2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/debug-internals.h>
33 #include <mono/utils/monobitset.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/mono-threads-coop.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
44 #include <mono/utils/mono-error-internals.h>
45 #include <mono/utils/os-event.h>
46 #include <mono/utils/mono-threads-debug.h>
47 #include <mono/metadata/w32handle.h>
48 #include <mono/metadata/w32event.h>
49 #include <mono/metadata/w32mutex.h>
51 #include <mono/metadata/reflection-internals.h>
52 #include <mono/metadata/abi-details.h>
53 #include <mono/metadata/w32error.h>
54 #include <mono/utils/w32api.h>
60 #if defined(HOST_WIN32)
64 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
65 #define USE_TKILL_ON_ANDROID 1
68 #ifdef PLATFORM_ANDROID
71 #ifdef USE_TKILL_ON_ANDROID
72 extern int tkill (pid_t tid, int signal);
76 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
77 #define THREAD_DEBUG(a)
78 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
79 #define THREAD_WAIT_DEBUG(a)
80 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
81 #define LIBGC_DEBUG(a)
83 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
84 #define SPIN_LOCK(i) do { \
85 if (SPIN_TRYLOCK (i)) \
89 #define SPIN_UNLOCK(i) i = 0
91 #define LOCK_THREAD(thread) lock_thread((thread))
92 #define UNLOCK_THREAD(thread) unlock_thread((thread))
104 typedef struct _StaticDataFreeList StaticDataFreeList;
105 struct _StaticDataFreeList {
106 StaticDataFreeList *next;
114 StaticDataFreeList *freelist;
117 /* Controls access to the 'threads' hash table */
118 static void mono_threads_lock (void);
119 static void mono_threads_unlock (void);
120 static MonoCoopMutex threads_mutex;
122 /* Controls access to the 'joinable_threads' hash table */
123 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
124 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
125 static mono_mutex_t joinable_threads_mutex;
127 /* Holds current status of static data heap */
128 static StaticDataInfo thread_static_info;
129 static StaticDataInfo context_static_info;
131 /* The hash of existing threads (key is thread ID, value is
132 * MonoInternalThread*) that need joining before exit
134 static MonoGHashTable *threads=NULL;
136 /* List of app context GC handles.
137 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
139 static GHashTable *contexts = NULL;
141 /* Cleanup queue for contexts. */
142 static MonoReferenceQueue *context_queue;
145 * Threads which are starting up and they are not in the 'threads' hash yet.
146 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
147 * Protected by mono_threads_lock ().
149 static MonoGHashTable *threads_starting_up = NULL;
152 /* Protected by the threads lock */
153 static GHashTable *joinable_threads;
154 static int joinable_thread_count;
156 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
157 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
159 /* function called at thread start */
160 static MonoThreadStartCB mono_thread_start_cb = NULL;
162 /* function called at thread attach */
163 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
165 /* function called at thread cleanup */
166 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
168 /* The default stack size for each thread */
169 static guint32 default_stacksize = 0;
170 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
172 static void context_adjust_static_data (MonoAppContext *ctx);
173 static void mono_free_static_data (gpointer* static_data);
174 static void mono_init_static_data_info (StaticDataInfo *static_data);
175 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
176 static gboolean mono_thread_resume (MonoInternalThread* thread);
177 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
178 static void self_abort_internal (MonoError *error);
179 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
180 static void self_suspend_internal (void);
182 static MonoException* mono_thread_execute_interruption (void);
183 static void ref_stack_destroy (gpointer rs);
185 /* Spin lock for InterlockedXXX 64 bit functions */
186 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
187 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
188 static mono_mutex_t interlocked_mutex;
190 /* global count of thread interruptions requested */
191 static gint32 thread_interruption_requested = 0;
193 /* Event signaled when a thread changes its background mode */
194 static MonoOSEvent background_change_event;
196 static gboolean shutting_down = FALSE;
198 static gint32 managed_thread_id_counter = 0;
200 /* Class lazy loading functions */
201 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
204 mono_threads_lock (void)
206 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
210 mono_threads_unlock (void)
212 mono_locks_coop_release (&threads_mutex, ThreadsLock);
217 get_next_managed_thread_id (void)
219 return InterlockedIncrement (&managed_thread_id_counter);
223 INTERRUPT_REQUESTED_BIT = 0x1,
224 INTERRUPT_REQUEST_DEFERRED_BIT = 0x2,
225 ABORT_PROT_BLOCK_SHIFT = 2,
226 ABORT_PROT_BLOCK_BITS = 8,
227 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
231 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
233 gsize state = thread->thread_state;
234 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
238 verify_thread_state (gsize state)
240 //can't have both INTERRUPT_REQUESTED_BIT and INTERRUPT_REQUEST_DEFERRED_BIT set at the same time
241 g_assert ((state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) != (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT));
243 //XXX This would be nice to be true, but can happen due to self-aborts (and possibly set-pending-exception)
244 //if prot_count > 0, INTERRUPT_REQUESTED_BIT must never be set
245 // int prot_count = (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
246 // g_assert (!(prot_count > 0 && (state & INTERRUPT_REQUESTED_BIT)));
250 mono_threads_begin_abort_protected_block (void)
252 MonoInternalThread *thread = mono_thread_internal_current ();
253 gsize old_state, new_state;
255 old_state = thread->thread_state;
256 verify_thread_state (old_state);
258 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
261 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) {
262 if (old_state & INTERRUPT_REQUESTED_BIT)
263 printf ("begin prot happy as it demoted interrupt to deferred interrupt\n");
264 new_state |= INTERRUPT_REQUEST_DEFERRED_BIT;
267 //bounds check abort_prot_count
268 g_assert (new_val > 0);
269 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
270 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
272 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
276 mono_threads_end_abort_protected_block (void)
278 MonoInternalThread *thread = mono_thread_internal_current ();
279 gsize old_state, new_state;
281 old_state = thread->thread_state;
282 verify_thread_state (old_state);
284 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
287 if ((old_state & INTERRUPT_REQUEST_DEFERRED_BIT) && new_val == 0) {
288 printf ("end abort on alert, promoted deferred to pront interrupt\n");
289 new_state |= INTERRUPT_REQUESTED_BIT;
292 //bounds check abort_prot_count
293 g_assert (new_val >= 0);
294 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
295 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
297 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
298 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
302 //Don't use this function, use inc/dec below
304 mono_thread_abort_prot_block_count_add (MonoInternalThread *thread, int val)
306 gsize old_state, new_state;
308 old_state = thread->thread_state;
309 verify_thread_state (old_state);
311 int new_val = val + ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
312 //bounds check abort_prot_count
313 g_assert (new_val >= 0);
314 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
315 new_state = (old_state & ~ABORT_PROT_BLOCK_MASK) | (new_val << ABORT_PROT_BLOCK_SHIFT);
317 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
321 mono_thread_inc_abort_prot_block_count (MonoInternalThread *thread)
323 mono_thread_abort_prot_block_count_add (thread, 1);
327 mono_thread_dec_abort_prot_block_count (MonoInternalThread *thread)
329 mono_thread_abort_prot_block_count_add (thread, -1);
333 mono_thread_get_interruption_requested (MonoInternalThread *thread)
335 gsize state = thread->thread_state;
336 return (state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
339 /* Returns TRUE is there was a state change */
341 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
343 gsize old_state, new_state;
345 old_state = thread->thread_state;
346 verify_thread_state (old_state);
349 if (!(old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)))
351 new_state = old_state & ~(INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT);
352 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
356 /* Returns TRUE is there was a state change */
358 mono_thread_set_interruption_requested (MonoInternalThread *thread)
360 //always force when the current thread is doing it to itself.
361 gboolean force_interrupt = thread == mono_thread_internal_current ();
362 gsize old_state, new_state;
364 old_state = thread->thread_state;
365 verify_thread_state (old_state);
367 int prot_count = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
369 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT))
372 //If there's an outstanding prot block, we queue it
373 if (prot_count && !force_interrupt) {
374 printf ("set interrupt unhappy, as it's only putting a deferred req %d\n", force_interrupt);
375 new_state = old_state | INTERRUPT_REQUEST_DEFERRED_BIT;
377 new_state = old_state | INTERRUPT_REQUESTED_BIT;
378 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
380 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
383 static inline MonoNativeThreadId
384 thread_get_tid (MonoInternalThread *thread)
386 /* We store the tid as a guint64 to keep the object layout constant between platforms */
387 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
390 static void ensure_synch_cs_set (MonoInternalThread *thread)
392 MonoCoopMutex *synch_cs;
394 if (thread->synch_cs != NULL) {
398 synch_cs = g_new0 (MonoCoopMutex, 1);
399 mono_coop_mutex_init_recursive (synch_cs);
401 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
402 synch_cs, NULL) != NULL) {
403 /* Another thread must have installed this CS */
404 mono_coop_mutex_destroy (synch_cs);
410 lock_thread (MonoInternalThread *thread)
412 if (!thread->synch_cs)
413 ensure_synch_cs_set (thread);
415 g_assert (thread->synch_cs);
417 mono_coop_mutex_lock (thread->synch_cs);
421 unlock_thread (MonoInternalThread *thread)
423 mono_coop_mutex_unlock (thread->synch_cs);
426 static inline gboolean
427 is_appdomainunloaded_exception (MonoClass *klass)
429 return klass == mono_class_get_appdomain_unloaded_exception_class ();
432 static inline gboolean
433 is_threadabort_exception (MonoClass *klass)
435 return klass == mono_defaults.threadabortexception_class;
439 * A special static data offset (guint32) consists of 3 parts:
441 * [0] 6-bit index into the array of chunks.
442 * [6] 25-bit offset into the array.
443 * [31] Bit indicating thread or context static.
448 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
459 } SpecialStaticOffset;
461 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
462 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
464 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
465 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
466 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
467 (((SpecialStaticOffset *) &(x))->fields.f)
470 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
472 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
474 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
475 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
477 return ((char *) thread->static_data [idx]) + off;
481 get_context_static_data (MonoAppContext *ctx, guint32 offset)
483 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
485 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
486 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
488 return ((char *) ctx->static_data [idx]) + off;
492 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
494 static MonoClassField *current_thread_field = NULL;
498 if (!current_thread_field) {
499 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
500 g_assert (current_thread_field);
503 mono_class_vtable (domain, mono_defaults.thread_class);
504 mono_domain_lock (domain);
505 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
506 mono_domain_unlock (domain);
509 return (MonoThread **)get_thread_static_data (thread, offset);
513 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
515 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
517 g_assert (current->obj.vtable->domain == domain);
519 g_assert (!*current_thread_ptr);
520 *current_thread_ptr = current;
524 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
530 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
533 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
534 /* only possible failure mode is OOM, from which we don't expect to recover. */
535 mono_error_assert_ok (&error);
537 MONO_OBJECT_SETREF (thread, internal_thread, internal);
542 static MonoInternalThread*
543 create_internal_thread_object (void)
546 MonoInternalThread *thread;
549 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
550 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
551 /* only possible failure mode is OOM, from which we don't exect to recover */
552 mono_error_assert_ok (&error);
554 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
555 mono_coop_mutex_init_recursive (thread->synch_cs);
557 thread->apartment_state = ThreadApartmentState_Unknown;
558 thread->managed_id = get_next_managed_thread_id ();
559 if (mono_gc_is_moving ()) {
560 thread->thread_pinning_ref = thread;
561 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
564 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
566 thread->suspended = g_new0 (MonoOSEvent, 1);
567 mono_os_event_init (thread->suspended, TRUE);
573 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
577 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
578 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
579 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
584 g_assert (internal->native_handle);
586 res = SetThreadPriority (internal->native_handle, priority - 2);
588 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
589 #else /* HOST_WIN32 */
592 struct sched_param param;
595 tid = thread_get_tid (internal);
597 res = pthread_getschedparam (tid, &policy, ¶m);
599 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
601 #ifdef _POSIX_PRIORITY_SCHEDULING
604 /* Necessary to get valid priority range */
606 min = sched_get_priority_min (policy);
607 max = sched_get_priority_max (policy);
609 if (max > 0 && min >= 0 && max > min) {
610 double srange, drange, sposition, dposition;
611 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
613 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
614 dposition = (sposition / srange) * drange;
615 param.sched_priority = (int)(dposition + min);
622 param.sched_priority = 50;
628 param.sched_priority = 0;
631 g_warning ("%s: unknown policy %d", __func__, policy);
636 res = pthread_setschedparam (tid, policy, ¶m);
639 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
642 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
644 #endif /* HOST_WIN32 */
648 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
651 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
653 MonoThreadInfo *info;
654 MonoInternalThread *internal;
655 MonoDomain *domain, *root_domain;
659 info = mono_thread_info_current ();
661 internal = thread->internal_thread;
662 internal->handle = mono_threads_open_thread_handle (info->handle);
664 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
666 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
667 internal->thread_info = info;
668 internal->small_id = info->small_id;
670 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
672 SET_CURRENT_OBJECT (internal);
674 domain = mono_object_domain (thread);
676 mono_thread_push_appdomain_ref (domain);
677 if (!mono_domain_set (domain, force_domain)) {
678 mono_thread_pop_appdomain_ref ();
682 mono_threads_lock ();
684 if (threads_starting_up)
685 mono_g_hash_table_remove (threads_starting_up, thread);
687 if (shutting_down && !force_attach) {
688 mono_threads_unlock ();
689 mono_thread_pop_appdomain_ref ();
694 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
697 /* We don't need to duplicate thread->handle, because it is
698 * only closed when the thread object is finalized by the GC. */
699 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
701 /* We have to do this here because mono_thread_start_cb
702 * requires that root_domain_thread is set up. */
703 if (thread_static_info.offset || thread_static_info.idx > 0) {
704 /* get the current allocated size */
705 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
706 mono_alloc_static_data (&internal->static_data, offset, TRUE);
709 mono_threads_unlock ();
711 root_domain = mono_get_root_domain ();
713 g_assert (!internal->root_domain_thread);
714 if (domain != root_domain)
715 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
717 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
719 if (domain != root_domain)
720 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
722 set_current_thread_for_domain (domain, internal, thread);
724 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
732 MonoObject *start_delegate;
733 MonoObject *start_delegate_arg;
734 MonoThreadStart start_func;
735 gpointer start_func_arg;
736 gboolean force_attach;
738 MonoCoopSem registered;
741 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
744 MonoThreadStart start_func;
745 void *start_func_arg;
748 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
752 MonoInternalThread *internal;
753 MonoObject *start_delegate;
754 MonoObject *start_delegate_arg;
757 thread = start_info->thread;
758 internal = thread->internal_thread;
759 domain = mono_object_domain (start_info->thread);
761 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
763 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
764 start_info->failed = TRUE;
766 mono_coop_sem_post (&start_info->registered);
768 if (InterlockedDecrement (&start_info->ref) == 0) {
769 mono_coop_sem_destroy (&start_info->registered);
776 mono_thread_internal_set_priority (internal, internal->priority);
780 start_delegate = start_info->start_delegate;
781 start_delegate_arg = start_info->start_delegate_arg;
782 start_func = start_info->start_func;
783 start_func_arg = start_info->start_func_arg;
785 /* This MUST be called before any managed code can be
786 * executed, as it calls the callback function that (for the
787 * jit) sets the lmf marker.
790 if (mono_thread_start_cb)
791 mono_thread_start_cb (tid, stack_ptr, start_func);
793 /* On 2.0 profile (and higher), set explicitly since state might have been
795 if (internal->apartment_state == ThreadApartmentState_Unknown)
796 internal->apartment_state = ThreadApartmentState_MTA;
798 mono_thread_init_apartment_state ();
800 /* Let the thread that called Start() know we're ready */
801 mono_coop_sem_post (&start_info->registered);
803 if (InterlockedDecrement (&start_info->ref) == 0) {
804 mono_coop_sem_destroy (&start_info->registered);
808 /* start_info is not valid anymore */
812 * Call this after calling start_notify, since the profiler callback might want
813 * to lock the thread, and the lock is held by thread_start () which waits for
816 mono_profiler_thread_start (tid);
818 /* if the name was set before starting, we didn't invoke the profiler callback */
819 if (internal->name) {
820 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
821 mono_profiler_thread_name (internal->tid, tname);
822 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
826 /* start_func is set only for unmanaged start functions */
828 start_func (start_func_arg);
832 g_assert (start_delegate != NULL);
834 /* we may want to handle the exception here. See comment below on unhandled exceptions */
835 args [0] = (gpointer) start_delegate_arg;
836 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
838 if (!mono_error_ok (&error)) {
839 MonoException *ex = mono_error_convert_to_exception (&error);
841 g_assert (ex != NULL);
842 MonoClass *klass = mono_object_get_class (&ex->object);
843 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
844 !is_threadabort_exception (klass)) {
845 mono_unhandled_exception (&ex->object);
846 mono_invoke_unhandled_exception_hook (&ex->object);
847 g_assert_not_reached ();
850 mono_error_cleanup (&error);
854 /* If the thread calls ExitThread at all, this remaining code
855 * will not be executed, but the main thread will eventually
856 * call mono_thread_detach_internal() on this thread's behalf.
859 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
861 /* Do any cleanup needed for apartment state. This
862 * cannot be done in mono_thread_detach_internal since
863 * mono_thread_detach_internal could be called for a
864 * thread other than the current thread.
865 * mono_thread_cleanup_apartment_state cleans up apartment
866 * for the current thead */
867 mono_thread_cleanup_apartment_state ();
869 mono_thread_detach_internal (internal);
877 start_wrapper (gpointer data)
879 StartInfo *start_info;
880 MonoThreadInfo *info;
883 start_info = (StartInfo*) data;
884 g_assert (start_info);
886 info = mono_thread_info_attach (&res);
887 info->runtime_thread = TRUE;
889 /* Run the actual main function of the thread */
890 res = start_wrapper_internal (start_info, &res);
892 mono_thread_info_exit (res);
894 g_assert_not_reached ();
900 * Common thread creation code.
901 * LOCKING: Acquires the threads lock.
904 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
905 MonoThreadCreateFlags flags, MonoError *error)
907 StartInfo *start_info = NULL;
908 MonoNativeThreadId tid;
910 gsize stack_set_size;
913 g_assert (!start_func && !start_func_arg);
915 g_assert (!start_delegate);
917 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
918 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
919 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
921 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
922 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
923 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
927 * Join joinable threads to prevent running out of threads since the finalizer
928 * thread might be blocked/backlogged.
930 mono_threads_join_threads ();
934 mono_threads_lock ();
935 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
936 mono_threads_unlock ();
939 if (threads_starting_up == NULL) {
940 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
942 mono_g_hash_table_insert (threads_starting_up, thread, thread);
943 mono_threads_unlock ();
945 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
946 if (internal->threadpool_thread)
947 mono_thread_set_state (internal, ThreadState_Background);
949 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
951 start_info = g_new0 (StartInfo, 1);
953 start_info->thread = thread;
954 start_info->start_delegate = start_delegate;
955 start_info->start_delegate_arg = thread->start_obj;
956 start_info->start_func = start_func;
957 start_info->start_func_arg = start_func_arg;
958 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
959 start_info->failed = FALSE;
960 mono_coop_sem_init (&start_info->registered, 0);
962 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
963 stack_set_size = default_stacksize_for_thread (internal);
967 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
968 /* The thread couldn't be created, so set an exception */
969 mono_threads_lock ();
970 mono_g_hash_table_remove (threads_starting_up, thread);
971 mono_threads_unlock ();
972 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
973 /* ref is not going to be decremented in start_wrapper_internal */
974 InterlockedDecrement (&start_info->ref);
979 internal->stack_size = (int) stack_set_size;
981 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
984 * Wait for the thread to set up its TLS data etc, so
985 * theres no potential race condition if someone tries
986 * to look up the data believing the thread has
990 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
992 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
994 ret = !start_info->failed;
997 if (InterlockedDecrement (&start_info->ref) == 0) {
998 mono_coop_sem_destroy (&start_info->registered);
1005 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1007 if (mono_thread_start_cb) {
1008 mono_thread_start_cb (tid, stack_start, func);
1012 void mono_threads_set_default_stacksize (guint32 stacksize)
1014 default_stacksize = stacksize;
1017 guint32 mono_threads_get_default_stacksize (void)
1019 return default_stacksize;
1023 * mono_thread_create_internal:
1025 * ARG should not be a GC reference.
1028 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1031 MonoInternalThread *internal;
1036 internal = create_internal_thread_object ();
1038 thread = create_thread_object (domain, internal);
1040 LOCK_THREAD (internal);
1042 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1044 UNLOCK_THREAD (internal);
1046 return_val_if_nok (error, NULL);
1051 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1054 if (!mono_thread_create_checked (domain, func, arg, &error))
1055 mono_error_cleanup (&error);
1059 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1061 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1065 mono_thread_attach (MonoDomain *domain)
1067 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1073 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1075 MonoInternalThread *internal;
1077 MonoThreadInfo *info;
1078 MonoNativeThreadId tid;
1081 if (mono_thread_internal_current_is_attached ()) {
1082 if (domain != mono_domain_get ())
1083 mono_domain_set (domain, TRUE);
1084 /* Already attached */
1085 return mono_thread_current ();
1088 info = mono_thread_info_attach (&stack_ptr);
1091 tid=mono_native_thread_id_get ();
1093 internal = create_internal_thread_object ();
1095 thread = create_thread_object (domain, internal);
1097 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1098 /* Mono is shutting down, so just wait for the end */
1100 mono_thread_info_sleep (10000, NULL);
1103 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1105 if (mono_thread_attach_cb) {
1109 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1112 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1114 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1117 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1118 if (!mono_thread_info_current ()->tools_thread)
1119 // FIXME: Need a separate callback
1120 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1126 mono_thread_detach_internal (MonoInternalThread *thread)
1130 g_assert (thread != NULL);
1132 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1135 mono_w32mutex_abandon ();
1138 if (thread->abort_state_handle) {
1139 mono_gchandle_free (thread->abort_state_handle);
1140 thread->abort_state_handle = 0;
1143 thread->abort_exc = NULL;
1144 thread->current_appcontext = NULL;
1147 * thread->synch_cs can be NULL if this was called after
1148 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1149 * This can happen only during shutdown.
1150 * The shutting_down flag is not always set, so we can't assert on it.
1152 if (thread->synch_cs)
1153 LOCK_THREAD (thread);
1155 thread->state |= ThreadState_Stopped;
1156 thread->state &= ~ThreadState_Background;
1158 if (thread->synch_cs)
1159 UNLOCK_THREAD (thread);
1162 An interruption request has leaked to cleanup. Adjust the global counter.
1164 This can happen is the abort source thread finds the abortee (this) thread
1165 in unmanaged code. If this thread never trips back to managed code or check
1166 the local flag it will be left set and positively unbalance the global counter.
1168 Leaving the counter unbalanced will cause a performance degradation since all threads
1169 will now keep checking their local flags all the time.
1171 if (mono_thread_clear_interruption_requested (thread))
1172 InterlockedDecrement (&thread_interruption_requested);
1174 mono_threads_lock ();
1178 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1179 /* We have to check whether the thread object for the
1180 * tid is still the same in the table because the
1181 * thread might have been destroyed and the tid reused
1182 * in the meantime, in which case the tid would be in
1183 * the table, but with another thread object.
1187 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1191 mono_threads_unlock ();
1193 /* Don't close the handle here, wait for the object finalizer
1194 * to do it. Otherwise, the following race condition applies:
1196 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1198 * 2) Some other handle is reassigned the same slot
1200 * 3) Another thread tries to join the first thread, and
1201 * blocks waiting for the reassigned handle to be signalled
1202 * (which might never happen). This is possible, because the
1203 * thread calling Join() still has a reference to the first
1207 /* if the thread is not in the hash it has been removed already */
1209 mono_domain_unset ();
1210 mono_memory_barrier ();
1212 if (mono_thread_cleanup_fn)
1213 mono_thread_cleanup_fn (thread_get_tid (thread));
1218 mono_release_type_locks (thread);
1220 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1221 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1222 mono_profiler_thread_end (thread->tid);
1224 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1227 * This will signal async signal handlers that the thread has exited.
1228 * The profiler callback needs this to be set, so it cannot be done earlier.
1230 mono_domain_unset ();
1231 mono_memory_barrier ();
1233 if (thread == mono_thread_internal_current ())
1234 mono_thread_pop_appdomain_ref ();
1236 mono_free_static_data (thread->static_data);
1237 thread->static_data = NULL;
1238 ref_stack_destroy (thread->appdomain_refs);
1239 thread->appdomain_refs = NULL;
1241 g_assert (thread->suspended);
1242 mono_os_event_destroy (thread->suspended);
1243 g_free (thread->suspended);
1244 thread->suspended = NULL;
1246 if (mono_thread_cleanup_fn)
1247 mono_thread_cleanup_fn (thread_get_tid (thread));
1249 mono_memory_barrier ();
1251 if (mono_gc_is_moving ()) {
1252 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1253 thread->thread_pinning_ref = NULL;
1257 SET_CURRENT_OBJECT (NULL);
1258 mono_domain_unset ();
1260 /* Don't need to close the handle to this thread, even though we took a
1261 * reference in mono_thread_attach (), because the GC will do it
1262 * when the Thread object is finalised.
1267 mono_thread_detach (MonoThread *thread)
1270 mono_thread_detach_internal (thread->internal_thread);
1274 * mono_thread_detach_if_exiting:
1276 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1277 * This should be used at the end of embedding code which calls into managed code, and which
1278 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1281 mono_thread_detach_if_exiting (void)
1283 if (mono_thread_info_is_exiting ()) {
1284 MonoInternalThread *thread;
1286 thread = mono_thread_internal_current ();
1288 mono_thread_detach_internal (thread);
1289 mono_thread_info_detach ();
1297 mono_thread_internal_current_is_attached (void)
1299 MonoInternalThread *internal;
1301 internal = GET_CURRENT_OBJECT ();
1309 mono_thread_exit (void)
1311 MonoInternalThread *thread = mono_thread_internal_current ();
1313 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1315 mono_thread_detach_internal (thread);
1317 /* we could add a callback here for embedders to use. */
1318 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1319 exit (mono_environment_exitcode_get ());
1321 mono_thread_info_exit (0);
1325 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1327 MonoInternalThread *internal;
1329 internal = create_internal_thread_object ();
1331 internal->state = ThreadState_Unstarted;
1333 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1337 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1339 return mono_thread_current ();
1343 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1347 MonoInternalThread *internal;
1350 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1352 if (!this_obj->internal_thread)
1353 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1354 internal = this_obj->internal_thread;
1356 LOCK_THREAD (internal);
1358 if ((internal->state & ThreadState_Unstarted) == 0) {
1359 UNLOCK_THREAD (internal);
1360 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1364 if ((internal->state & ThreadState_Aborted) != 0) {
1365 UNLOCK_THREAD (internal);
1369 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1371 mono_error_cleanup (&error);
1372 UNLOCK_THREAD (internal);
1376 internal->state &= ~ThreadState_Unstarted;
1378 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1380 UNLOCK_THREAD (internal);
1381 return internal->handle;
1385 * This is called from the finalizer of the internal thread object.
1388 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1390 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1393 * Since threads keep a reference to their thread object while running, by
1394 * the time this function is called, the thread has already exited/detached,
1395 * i.e. mono_thread_detach_internal () has ran. The exception is during
1396 * shutdown, when mono_thread_detach_internal () can be called after this.
1398 if (this_obj->handle) {
1399 mono_threads_close_thread_handle (this_obj->handle);
1400 this_obj->handle = NULL;
1404 CloseHandle (this_obj->native_handle);
1407 if (this_obj->synch_cs) {
1408 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1409 this_obj->synch_cs = NULL;
1410 mono_coop_mutex_destroy (synch_cs);
1414 if (this_obj->name) {
1415 void *name = this_obj->name;
1416 this_obj->name = NULL;
1422 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1425 MonoInternalThread *thread = mono_thread_internal_current ();
1427 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1429 if (mono_thread_current_check_pending_interrupt ())
1433 gboolean alerted = FALSE;
1435 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1437 res = mono_thread_info_sleep (ms, &alerted);
1439 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1442 MonoException* exc = mono_thread_execute_interruption ();
1444 mono_raise_exception (exc);
1446 // FIXME: !MONO_INFINITE_WAIT
1447 if (ms != MONO_INFINITE_WAIT)
1456 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1461 ves_icall_System_Threading_Thread_GetDomainID (void)
1463 return mono_domain_get()->domain_id;
1467 ves_icall_System_Threading_Thread_Yield (void)
1469 return mono_thread_info_yield ();
1473 * mono_thread_get_name:
1475 * Return the name of the thread. NAME_LEN is set to the length of the name.
1476 * Return NULL if the thread has no name. The returned memory is owned by the
1480 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1484 LOCK_THREAD (this_obj);
1486 if (!this_obj->name) {
1490 *name_len = this_obj->name_len;
1491 res = g_new (gunichar2, this_obj->name_len);
1492 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1495 UNLOCK_THREAD (this_obj);
1501 * mono_thread_get_name_utf8:
1503 * Return the name of the thread in UTF-8.
1504 * Return NULL if the thread has no name.
1505 * The returned memory is owned by the caller.
1508 mono_thread_get_name_utf8 (MonoThread *thread)
1513 MonoInternalThread *internal = thread->internal_thread;
1514 if (internal == NULL)
1517 LOCK_THREAD (internal);
1519 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1521 UNLOCK_THREAD (internal);
1527 * mono_thread_get_managed_id:
1529 * Return the Thread.ManagedThreadId value of `thread`.
1530 * Returns -1 if `thread` is NULL.
1533 mono_thread_get_managed_id (MonoThread *thread)
1538 MonoInternalThread *internal = thread->internal_thread;
1539 if (internal == NULL)
1542 int32_t id = internal->managed_id;
1548 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1553 error_init (&error);
1555 LOCK_THREAD (this_obj);
1557 if (!this_obj->name)
1560 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1562 UNLOCK_THREAD (this_obj);
1564 if (mono_error_set_pending_exception (&error))
1571 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1573 LOCK_THREAD (this_obj);
1578 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1579 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1580 UNLOCK_THREAD (this_obj);
1582 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1585 if (this_obj->name) {
1586 g_free (this_obj->name);
1587 this_obj->name_len = 0;
1590 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1591 this_obj->name_len = mono_string_length (name);
1594 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1597 this_obj->name = NULL;
1600 UNLOCK_THREAD (this_obj);
1602 if (this_obj->name && this_obj->tid) {
1603 char *tname = mono_string_to_utf8_checked (name, error);
1604 return_if_nok (error);
1605 mono_profiler_thread_name (this_obj->tid, tname);
1606 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1612 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1615 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1616 mono_error_set_pending_exception (&error);
1620 * ves_icall_System_Threading_Thread_GetPriority_internal:
1621 * @param this_obj: The MonoInternalThread on which to operate.
1623 * Gets the priority of the given thread.
1624 * @return: The priority of the given thread.
1627 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1630 MonoInternalThread *internal = this_obj->internal_thread;
1632 LOCK_THREAD (internal);
1633 priority = internal->priority;
1634 UNLOCK_THREAD (internal);
1640 * ves_icall_System_Threading_Thread_SetPriority_internal:
1641 * @param this_obj: The MonoInternalThread on which to operate.
1642 * @param priority: The priority to set.
1644 * Sets the priority of the given thread.
1647 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1649 MonoInternalThread *internal = this_obj->internal_thread;
1651 LOCK_THREAD (internal);
1652 internal->priority = priority;
1653 if (internal->thread_info != NULL)
1654 mono_thread_internal_set_priority (internal, priority);
1655 UNLOCK_THREAD (internal);
1658 /* If the array is already in the requested domain, we just return it,
1659 otherwise we return a copy in that domain. */
1661 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1669 if (mono_object_domain (arr) == domain)
1672 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1673 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1678 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1681 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1682 mono_error_set_pending_exception (&error);
1687 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1690 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1691 mono_error_set_pending_exception (&error);
1696 mono_thread_current (void)
1698 MonoDomain *domain = mono_domain_get ();
1699 MonoInternalThread *internal = mono_thread_internal_current ();
1700 MonoThread **current_thread_ptr;
1702 g_assert (internal);
1703 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1705 if (!*current_thread_ptr) {
1706 g_assert (domain != mono_get_root_domain ());
1707 *current_thread_ptr = create_thread_object (domain, internal);
1709 return *current_thread_ptr;
1712 /* Return the thread object belonging to INTERNAL in the current domain */
1714 mono_thread_current_for_thread (MonoInternalThread *internal)
1716 MonoDomain *domain = mono_domain_get ();
1717 MonoThread **current_thread_ptr;
1719 g_assert (internal);
1720 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1722 if (!*current_thread_ptr) {
1723 g_assert (domain != mono_get_root_domain ());
1724 *current_thread_ptr = create_thread_object (domain, internal);
1726 return *current_thread_ptr;
1730 mono_thread_internal_current (void)
1732 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1733 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1737 static MonoThreadInfoWaitRet
1738 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1741 MonoThreadInfoWaitRet ret;
1748 start = (ms == -1) ? 0 : mono_msec_ticks ();
1751 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1754 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1757 exc = mono_thread_execute_interruption ();
1759 mono_error_set_exception_instance (error, exc);
1766 /* Re-calculate ms according to the time passed */
1767 diff_ms = (gint32)(mono_msec_ticks () - start);
1768 if (diff_ms >= ms) {
1769 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1772 wait = ms - diff_ms;
1779 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1781 MonoInternalThread *thread = this_obj->internal_thread;
1782 MonoThreadHandle *handle = thread->handle;
1783 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1787 if (mono_thread_current_check_pending_interrupt ())
1790 LOCK_THREAD (thread);
1792 if ((thread->state & ThreadState_Unstarted) != 0) {
1793 UNLOCK_THREAD (thread);
1795 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1799 UNLOCK_THREAD (thread);
1802 ms=MONO_INFINITE_WAIT;
1804 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1806 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1808 ret=mono_join_uninterrupted (handle, ms, &error);
1810 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1812 mono_error_set_pending_exception (&error);
1814 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1815 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1820 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1825 #define MANAGED_WAIT_FAILED 0x7fffffff
1828 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1830 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1831 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1832 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1833 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1834 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1835 return WAIT_IO_COMPLETION;
1836 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1837 return WAIT_TIMEOUT;
1838 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1839 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1840 return MANAGED_WAIT_FAILED;
1842 g_error ("%s: unknown val value %d", __func__, val);
1846 static MonoW32HandleWaitRet
1847 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1850 MonoW32HandleWaitRet ret;
1857 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1861 if (numhandles != 1)
1862 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1864 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1866 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1867 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1868 #endif /* HOST_WIN32 */
1871 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1874 exc = mono_thread_execute_interruption ();
1876 mono_error_set_exception_instance (error, exc);
1883 /* Re-calculate ms according to the time passed */
1884 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1885 if (diff_ms >= ms) {
1886 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1889 wait = ms - diff_ms;
1895 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1900 MonoW32HandleWaitRet ret;
1902 MonoObject *waitHandle;
1903 MonoInternalThread *thread = mono_thread_internal_current ();
1905 /* Do this WaitSleepJoin check before creating objects */
1906 if (mono_thread_current_check_pending_interrupt ())
1907 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1909 /* We fail in managed if the array has more than 64 elements */
1910 numhandles = (guint32)mono_array_length(mono_handles);
1911 handles = g_new0(HANDLE, numhandles);
1913 for(i = 0; i < numhandles; i++) {
1914 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1915 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1919 ms=MONO_INFINITE_WAIT;
1922 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1924 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1926 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1930 mono_error_set_pending_exception (&error);
1932 return map_native_wait_result_to_managed (ret, numhandles);
1935 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1938 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1939 uintptr_t numhandles;
1940 MonoW32HandleWaitRet ret;
1942 MonoObject *waitHandle;
1943 MonoInternalThread *thread = mono_thread_internal_current ();
1945 /* Do this WaitSleepJoin check before creating objects */
1946 if (mono_thread_current_check_pending_interrupt ())
1947 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1949 numhandles = mono_array_length(mono_handles);
1950 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1951 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1953 for(i = 0; i < numhandles; i++) {
1954 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1955 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1959 ms=MONO_INFINITE_WAIT;
1962 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1964 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1966 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1968 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1970 mono_error_set_pending_exception (&error);
1972 return map_native_wait_result_to_managed (ret, numhandles);
1975 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1978 MonoW32HandleWaitRet ret;
1979 MonoInternalThread *thread = mono_thread_internal_current ();
1981 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1984 ms=MONO_INFINITE_WAIT;
1987 if (mono_thread_current_check_pending_interrupt ())
1988 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1990 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1992 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1994 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1996 mono_error_set_pending_exception (&error);
1997 return map_native_wait_result_to_managed (ret, 1);
2001 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2003 MonoW32HandleWaitRet ret;
2004 MonoInternalThread *thread = mono_thread_internal_current ();
2007 ms = MONO_INFINITE_WAIT;
2009 if (mono_thread_current_check_pending_interrupt ())
2010 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2012 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2016 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2018 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2022 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2024 return map_native_wait_result_to_managed (ret, 1);
2027 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2029 return InterlockedIncrement (location);
2032 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2034 #if SIZEOF_VOID_P == 4
2035 if (G_UNLIKELY ((size_t)location & 0x7)) {
2037 mono_interlocked_lock ();
2040 mono_interlocked_unlock ();
2044 return InterlockedIncrement64 (location);
2047 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2049 return InterlockedDecrement(location);
2052 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2054 #if SIZEOF_VOID_P == 4
2055 if (G_UNLIKELY ((size_t)location & 0x7)) {
2057 mono_interlocked_lock ();
2060 mono_interlocked_unlock ();
2064 return InterlockedDecrement64 (location);
2067 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2069 return InterlockedExchange(location, value);
2072 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2075 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2076 mono_gc_wbarrier_generic_nostore (location);
2080 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2082 return InterlockedExchangePointer(location, value);
2085 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2087 IntFloatUnion val, ret;
2090 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2096 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2098 #if SIZEOF_VOID_P == 4
2099 if (G_UNLIKELY ((size_t)location & 0x7)) {
2101 mono_interlocked_lock ();
2104 mono_interlocked_unlock ();
2108 return InterlockedExchange64 (location, value);
2112 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2114 LongDoubleUnion val, ret;
2117 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2122 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2124 return InterlockedCompareExchange(location, value, comparand);
2127 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2129 gint32 r = InterlockedCompareExchange(location, value, comparand);
2130 *success = r == comparand;
2134 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2137 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2138 mono_gc_wbarrier_generic_nostore (location);
2142 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2144 return InterlockedCompareExchangePointer(location, value, comparand);
2147 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2149 IntFloatUnion val, ret, cmp;
2152 cmp.fval = comparand;
2153 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2159 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2161 #if SIZEOF_VOID_P == 8
2162 LongDoubleUnion val, comp, ret;
2165 comp.fval = comparand;
2166 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2172 mono_interlocked_lock ();
2174 if (old == comparand)
2176 mono_interlocked_unlock ();
2183 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2185 #if SIZEOF_VOID_P == 4
2186 if (G_UNLIKELY ((size_t)location & 0x7)) {
2188 mono_interlocked_lock ();
2190 if (old == comparand)
2192 mono_interlocked_unlock ();
2196 return InterlockedCompareExchange64 (location, value, comparand);
2200 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2203 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2204 mono_gc_wbarrier_generic_nostore (location);
2209 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2212 MONO_CHECK_NULL (location, NULL);
2213 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2214 mono_gc_wbarrier_generic_nostore (location);
2219 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2221 return InterlockedAdd (location, value);
2225 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2227 #if SIZEOF_VOID_P == 4
2228 if (G_UNLIKELY ((size_t)location & 0x7)) {
2230 mono_interlocked_lock ();
2233 mono_interlocked_unlock ();
2237 return InterlockedAdd64 (location, value);
2241 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2243 #if SIZEOF_VOID_P == 4
2244 if (G_UNLIKELY ((size_t)location & 0x7)) {
2246 mono_interlocked_lock ();
2248 mono_interlocked_unlock ();
2252 return InterlockedRead64 (location);
2256 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2258 mono_memory_barrier ();
2262 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2264 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2266 if (state & ThreadState_Background) {
2267 /* If the thread changes the background mode, the main thread has to
2268 * be notified, since it has to rebuild the list of threads to
2271 mono_os_event_set (&background_change_event);
2276 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2278 mono_thread_set_state (this_obj, (MonoThreadState)state);
2280 if (state & ThreadState_Background) {
2281 /* If the thread changes the background mode, the main thread has to
2282 * be notified, since it has to rebuild the list of threads to
2285 mono_os_event_set (&background_change_event);
2290 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2294 LOCK_THREAD (this_obj);
2296 state = this_obj->state;
2298 UNLOCK_THREAD (this_obj);
2303 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2305 MonoInternalThread *current;
2307 MonoInternalThread *thread = this_obj->internal_thread;
2309 LOCK_THREAD (thread);
2311 current = mono_thread_internal_current ();
2313 thread->thread_interrupt_requested = TRUE;
2314 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2316 UNLOCK_THREAD (thread);
2319 async_abort_internal (thread, FALSE);
2324 * mono_thread_current_check_pending_interrupt:
2326 * Checks if there's a interruption request and set the pending exception if so.
2328 * @returns true if a pending exception was set
2331 mono_thread_current_check_pending_interrupt (void)
2333 MonoInternalThread *thread = mono_thread_internal_current ();
2334 gboolean throw_ = FALSE;
2336 LOCK_THREAD (thread);
2338 if (thread->thread_interrupt_requested) {
2340 thread->thread_interrupt_requested = FALSE;
2343 UNLOCK_THREAD (thread);
2346 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2351 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2353 LOCK_THREAD (thread);
2355 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2357 UNLOCK_THREAD (thread);
2361 if ((thread->state & ThreadState_Unstarted) != 0) {
2362 thread->state |= ThreadState_Aborted;
2363 UNLOCK_THREAD (thread);
2367 thread->state |= ThreadState_AbortRequested;
2368 if (thread->abort_state_handle)
2369 mono_gchandle_free (thread->abort_state_handle);
2371 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2372 g_assert (thread->abort_state_handle);
2374 thread->abort_state_handle = 0;
2376 thread->abort_exc = NULL;
2378 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), thread, (gsize)thread->tid));
2380 /* During shutdown, we can't wait for other threads */
2382 /* Make sure the thread is awake */
2383 mono_thread_resume (thread);
2385 UNLOCK_THREAD (thread);
2390 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2392 if (!request_thread_abort (thread, state))
2395 if (thread == mono_thread_internal_current ()) {
2397 self_abort_internal (&error);
2398 mono_error_set_pending_exception (&error);
2400 async_abort_internal (thread, TRUE);
2405 * mono_thread_internal_abort:
2407 * Request thread @thread to be aborted.
2409 * @thread MUST NOT be the current thread.
2412 mono_thread_internal_abort (MonoInternalThread *thread)
2414 g_assert (thread != mono_thread_internal_current ());
2416 if (!request_thread_abort (thread, NULL))
2418 async_abort_internal (thread, TRUE);
2422 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2424 MonoInternalThread *thread = mono_thread_internal_current ();
2425 gboolean was_aborting;
2427 LOCK_THREAD (thread);
2428 was_aborting = thread->state & ThreadState_AbortRequested;
2429 thread->state &= ~ThreadState_AbortRequested;
2430 UNLOCK_THREAD (thread);
2432 if (!was_aborting) {
2433 const char *msg = "Unable to reset abort because no abort was requested";
2434 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2438 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2439 thread->abort_exc = NULL;
2440 if (thread->abort_state_handle) {
2441 mono_gchandle_free (thread->abort_state_handle);
2442 /* This is actually not necessary - the handle
2443 only counts if the exception is set */
2444 thread->abort_state_handle = 0;
2449 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2451 LOCK_THREAD (thread);
2453 thread->state &= ~ThreadState_AbortRequested;
2455 if (thread->abort_exc) {
2456 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2457 thread->abort_exc = NULL;
2458 if (thread->abort_state_handle) {
2459 mono_gchandle_free (thread->abort_state_handle);
2460 /* This is actually not necessary - the handle
2461 only counts if the exception is set */
2462 thread->abort_state_handle = 0;
2466 UNLOCK_THREAD (thread);
2470 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2473 MonoInternalThread *thread = this_obj->internal_thread;
2474 MonoObject *state, *deserialized = NULL;
2477 if (!thread->abort_state_handle)
2480 state = mono_gchandle_get_target (thread->abort_state_handle);
2483 domain = mono_domain_get ();
2484 if (mono_object_domain (state) == domain)
2487 deserialized = mono_object_xdomain_representation (state, domain, &error);
2489 if (!deserialized) {
2490 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2491 if (!is_ok (&error)) {
2492 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2493 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2495 mono_set_pending_exception (invalid_op_exc);
2499 return deserialized;
2503 mono_thread_suspend (MonoInternalThread *thread)
2505 LOCK_THREAD (thread);
2507 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2509 UNLOCK_THREAD (thread);
2513 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2515 UNLOCK_THREAD (thread);
2519 thread->state |= ThreadState_SuspendRequested;
2520 mono_os_event_reset (thread->suspended);
2522 if (thread == mono_thread_internal_current ()) {
2523 /* calls UNLOCK_THREAD (thread) */
2524 self_suspend_internal ();
2526 /* calls UNLOCK_THREAD (thread) */
2527 async_suspend_internal (thread, FALSE);
2534 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2536 if (!mono_thread_suspend (this_obj->internal_thread)) {
2537 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2542 /* LOCKING: LOCK_THREAD(thread) must be held */
2544 mono_thread_resume (MonoInternalThread *thread)
2546 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2547 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2548 thread->state &= ~ThreadState_SuspendRequested;
2549 mono_os_event_set (thread->suspended);
2553 if ((thread->state & ThreadState_Suspended) == 0 ||
2554 (thread->state & ThreadState_Unstarted) != 0 ||
2555 (thread->state & ThreadState_Aborted) != 0 ||
2556 (thread->state & ThreadState_Stopped) != 0)
2558 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2562 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2564 mono_os_event_set (thread->suspended);
2566 if (!thread->self_suspended) {
2567 UNLOCK_THREAD (thread);
2569 /* Awake the thread */
2570 if (!mono_thread_info_resume (thread_get_tid (thread)))
2573 LOCK_THREAD (thread);
2576 thread->state &= ~ThreadState_Suspended;
2582 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2584 if (!thread->internal_thread) {
2585 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2587 LOCK_THREAD (thread->internal_thread);
2588 if (!mono_thread_resume (thread->internal_thread))
2589 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2590 UNLOCK_THREAD (thread->internal_thread);
2595 mono_threads_is_critical_method (MonoMethod *method)
2597 switch (method->wrapper_type) {
2598 case MONO_WRAPPER_RUNTIME_INVOKE:
2599 case MONO_WRAPPER_XDOMAIN_INVOKE:
2600 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2607 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2612 if (mono_threads_is_critical_method (m)) {
2613 *((gboolean*)data) = TRUE;
2620 is_running_protected_wrapper (void)
2622 gboolean found = FALSE;
2623 mono_stack_walk (find_wrapper, &found);
2628 mono_thread_stop (MonoThread *thread)
2630 MonoInternalThread *internal = thread->internal_thread;
2632 if (!request_thread_abort (internal, NULL))
2635 if (internal == mono_thread_internal_current ()) {
2637 self_abort_internal (&error);
2639 This function is part of the embeding API and has no way to return the exception
2640 to be thrown. So what we do is keep the old behavior and raise the exception.
2642 mono_error_raise_exception (&error); /* OK to throw, see note */
2644 async_abort_internal (internal, TRUE);
2649 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2651 gint8 tmp = *(volatile gint8 *)ptr;
2652 mono_memory_barrier ();
2657 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2659 gint16 tmp = *(volatile gint16 *)ptr;
2660 mono_memory_barrier ();
2665 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2667 gint32 tmp = *(volatile gint32 *)ptr;
2668 mono_memory_barrier ();
2673 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2675 gint64 tmp = *(volatile gint64 *)ptr;
2676 mono_memory_barrier ();
2681 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2683 volatile void *tmp = *(volatile void **)ptr;
2684 mono_memory_barrier ();
2685 return (void *) tmp;
2689 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2691 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2692 mono_memory_barrier ();
2693 return (MonoObject *) tmp;
2697 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2699 double tmp = *(volatile double *)ptr;
2700 mono_memory_barrier ();
2705 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2707 float tmp = *(volatile float *)ptr;
2708 mono_memory_barrier ();
2713 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2715 return InterlockedRead8 ((volatile gint8 *)ptr);
2719 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2721 return InterlockedRead16 ((volatile gint16 *)ptr);
2725 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2727 return InterlockedRead ((volatile gint32 *)ptr);
2731 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2733 #if SIZEOF_VOID_P == 4
2734 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2736 mono_interlocked_lock ();
2737 val = *(gint64*)ptr;
2738 mono_interlocked_unlock ();
2742 return InterlockedRead64 ((volatile gint64 *)ptr);
2746 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2748 return InterlockedReadPointer ((volatile gpointer *)ptr);
2752 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2756 #if SIZEOF_VOID_P == 4
2757 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2759 mono_interlocked_lock ();
2760 val = *(double*)ptr;
2761 mono_interlocked_unlock ();
2766 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2772 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2776 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2782 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2784 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2788 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2790 mono_memory_barrier ();
2791 *(volatile gint8 *)ptr = value;
2795 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2797 mono_memory_barrier ();
2798 *(volatile gint16 *)ptr = value;
2802 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2804 mono_memory_barrier ();
2805 *(volatile gint32 *)ptr = value;
2809 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2811 mono_memory_barrier ();
2812 *(volatile gint64 *)ptr = value;
2816 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2818 mono_memory_barrier ();
2819 *(volatile void **)ptr = value;
2823 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2825 mono_memory_barrier ();
2826 mono_gc_wbarrier_generic_store (ptr, value);
2830 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2832 mono_memory_barrier ();
2833 *(volatile double *)ptr = value;
2837 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2839 mono_memory_barrier ();
2840 *(volatile float *)ptr = value;
2844 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2846 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2850 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2852 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2856 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2858 InterlockedWrite ((volatile gint32 *)ptr, value);
2862 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2864 #if SIZEOF_VOID_P == 4
2865 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2866 mono_interlocked_lock ();
2867 *(gint64*)ptr = value;
2868 mono_interlocked_unlock ();
2873 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2877 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2879 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2883 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2887 #if SIZEOF_VOID_P == 4
2888 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2889 mono_interlocked_lock ();
2890 *(double*)ptr = value;
2891 mono_interlocked_unlock ();
2898 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2902 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2908 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2912 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2914 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2918 free_context (void *user_data)
2920 ContextStaticData *data = user_data;
2922 mono_threads_lock ();
2925 * There is no guarantee that, by the point this reference queue callback
2926 * has been invoked, the GC handle associated with the object will fail to
2927 * resolve as one might expect. So if we don't free and remove the GC
2928 * handle here, free_context_static_data_helper () could end up resolving
2929 * a GC handle to an actually-dead context which would contain a pointer
2930 * to an already-freed static data segment, resulting in a crash when
2933 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2935 mono_threads_unlock ();
2937 mono_gchandle_free (data->gc_handle);
2938 mono_free_static_data (data->static_data);
2943 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2945 mono_threads_lock ();
2947 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2950 contexts = g_hash_table_new (NULL, NULL);
2953 context_queue = mono_gc_reference_queue_new (free_context);
2955 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2956 g_hash_table_insert (contexts, gch, gch);
2959 * We use this intermediate structure to contain a duplicate pointer to
2960 * the static data because we can't rely on being able to resolve the GC
2961 * handle in the reference queue callback.
2963 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2964 data->gc_handle = GPOINTER_TO_UINT (gch);
2967 context_adjust_static_data (ctx);
2968 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2970 mono_threads_unlock ();
2972 mono_profiler_context_loaded (ctx);
2976 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2979 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2980 * cleanup in exceptional circumstances, we don't actually do any
2981 * cleanup work here. We instead do this via a reference queue.
2984 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2986 mono_profiler_context_unloaded (ctx);
2989 void mono_thread_init (MonoThreadStartCB start_cb,
2990 MonoThreadAttachCB attach_cb)
2992 mono_coop_mutex_init_recursive (&threads_mutex);
2994 mono_os_mutex_init_recursive(&interlocked_mutex);
2995 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2997 mono_os_event_init (&background_change_event, FALSE);
2999 mono_init_static_data_info (&thread_static_info);
3000 mono_init_static_data_info (&context_static_info);
3002 mono_thread_start_cb = start_cb;
3003 mono_thread_attach_cb = attach_cb;
3006 void mono_thread_cleanup (void)
3008 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3009 /* The main thread must abandon any held mutexes (particularly
3010 * important for named mutexes as they are shared across
3011 * processes, see bug 74680.) This will happen when the
3012 * thread exits, but if it's not running in a subthread it
3013 * won't exit in time.
3015 mono_w32mutex_abandon ();
3019 /* This stuff needs more testing, it seems one of these
3020 * critical sections can be locked when mono_thread_cleanup is
3023 mono_coop_mutex_destroy (&threads_mutex);
3024 mono_os_mutex_destroy (&interlocked_mutex);
3025 mono_os_mutex_destroy (&delayed_free_table_mutex);
3026 mono_os_mutex_destroy (&small_id_mutex);
3027 mono_os_event_destroy (&background_change_event);
3032 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3034 mono_thread_cleanup_fn = func;
3038 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3040 thread->internal_thread->manage_callback = func;
3044 static void print_tids (gpointer key, gpointer value, gpointer user)
3046 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3047 * sizeof(uint) and a cast to uint would overflow
3049 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3050 * print this as a pointer.
3052 g_message ("Waiting for: %p", key);
3057 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3058 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3063 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3066 MonoThreadInfoWaitRet ret;
3068 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3070 /* Add the thread state change event, so it wakes
3071 * up if a thread changes to background mode. */
3074 if (check_state_change)
3075 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3077 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3080 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3081 /* See the comment in build_wait_tids() */
3082 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3086 for( i = 0; i < wait->num; i++)
3087 mono_threads_close_thread_handle (wait->handles [i]);
3089 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3092 if (ret < wait->num) {
3093 MonoInternalThread *internal;
3095 internal = wait->threads [ret];
3097 mono_threads_lock ();
3098 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3099 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3100 mono_threads_unlock ();
3104 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3106 struct wait_data *wait=(struct wait_data *)user;
3108 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3109 MonoInternalThread *thread=(MonoInternalThread *)value;
3111 /* Ignore background threads, we abort them later */
3112 /* Do not lock here since it is not needed and the caller holds threads_lock */
3113 if (thread->state & ThreadState_Background) {
3114 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3115 return; /* just leave, ignore */
3118 if (mono_gc_is_finalizer_internal_thread (thread)) {
3119 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3123 if (thread == mono_thread_internal_current ()) {
3124 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3128 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3129 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3133 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3134 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3138 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3139 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3140 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3141 wait->threads[wait->num]=thread;
3144 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3146 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3151 /* Just ignore the rest, we can't do anything with
3158 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3160 struct wait_data *wait=(struct wait_data *)user;
3161 MonoNativeThreadId self = mono_native_thread_id_get ();
3162 MonoInternalThread *thread = (MonoInternalThread *)value;
3164 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3167 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3169 if (mono_gc_is_finalizer_internal_thread (thread))
3172 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3173 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3174 wait->threads[wait->num] = thread;
3177 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3178 mono_thread_internal_abort (thread);
3185 * mono_threads_set_shutting_down:
3187 * Is called by a thread that wants to shut down Mono. If the runtime is already
3188 * shutting down, the calling thread is suspended/stopped, and this function never
3192 mono_threads_set_shutting_down (void)
3194 MonoInternalThread *current_thread = mono_thread_internal_current ();
3196 mono_threads_lock ();
3198 if (shutting_down) {
3199 mono_threads_unlock ();
3201 /* Make sure we're properly suspended/stopped */
3203 LOCK_THREAD (current_thread);
3205 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3206 UNLOCK_THREAD (current_thread);
3207 mono_thread_execute_interruption ();
3209 UNLOCK_THREAD (current_thread);
3212 /*since we're killing the thread, detach it.*/
3213 mono_thread_detach_internal (current_thread);
3215 /* Wake up other threads potentially waiting for us */
3216 mono_thread_info_exit (0);
3218 shutting_down = TRUE;
3220 /* Not really a background state change, but this will
3221 * interrupt the main thread if it is waiting for all
3222 * the other threads.
3224 mono_os_event_set (&background_change_event);
3226 mono_threads_unlock ();
3230 void mono_thread_manage (void)
3232 struct wait_data wait_data;
3233 struct wait_data *wait = &wait_data;
3235 memset (wait, 0, sizeof (struct wait_data));
3236 /* join each thread that's still running */
3237 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3239 mono_threads_lock ();
3241 THREAD_DEBUG (g_message("%s: No threads", __func__));
3242 mono_threads_unlock ();
3245 mono_threads_unlock ();
3248 mono_threads_lock ();
3249 if (shutting_down) {
3250 /* somebody else is shutting down */
3251 mono_threads_unlock ();
3254 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3255 mono_g_hash_table_foreach (threads, print_tids, NULL));
3257 mono_os_event_reset (&background_change_event);
3259 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3260 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3261 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3262 mono_threads_unlock ();
3264 /* Something to wait for */
3265 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3266 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3267 } while(wait->num>0);
3269 /* Mono is shutting down, so just wait for the end */
3270 if (!mono_runtime_try_shutdown ()) {
3271 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3272 mono_thread_suspend (mono_thread_internal_current ());
3273 mono_thread_execute_interruption ();
3277 * Remove everything but the finalizer thread and self.
3278 * Also abort all the background threads
3281 mono_threads_lock ();
3284 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3285 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3286 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3288 mono_threads_unlock ();
3290 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3291 if (wait->num > 0) {
3292 /* Something to wait for */
3293 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3295 } while (wait->num > 0);
3298 * give the subthreads a chance to really quit (this is mainly needed
3299 * to get correct user and system times from getrusage/wait/time(1)).
3300 * This could be removed if we avoid pthread_detach() and use pthread_join().
3302 mono_thread_info_yield ();
3306 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3308 MonoInternalThread *thread = (MonoInternalThread*)value;
3309 struct wait_data *wait = (struct wait_data*)user_data;
3312 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3314 * This needs no locking.
3316 if ((thread->state & ThreadState_Suspended) != 0 ||
3317 (thread->state & ThreadState_Stopped) != 0)
3320 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3321 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3322 wait->threads [wait->num] = thread;
3328 * mono_thread_suspend_all_other_threads:
3330 * Suspend all managed threads except the finalizer thread and this thread. It is
3331 * not possible to resume them later.
3333 void mono_thread_suspend_all_other_threads (void)
3335 struct wait_data wait_data;
3336 struct wait_data *wait = &wait_data;
3338 MonoNativeThreadId self = mono_native_thread_id_get ();
3339 guint32 eventidx = 0;
3340 gboolean starting, finished;
3342 memset (wait, 0, sizeof (struct wait_data));
3344 * The other threads could be in an arbitrary state at this point, i.e.
3345 * they could be starting up, shutting down etc. This means that there could be
3346 * threads which are not even in the threads hash table yet.
3350 * First we set a barrier which will be checked by all threads before they
3351 * are added to the threads hash table, and they will exit if the flag is set.
3352 * This ensures that no threads could be added to the hash later.
3353 * We will use shutting_down as the barrier for now.
3355 g_assert (shutting_down);
3358 * We make multiple calls to WaitForMultipleObjects since:
3359 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3360 * - some threads could exit without becoming suspended
3365 * Make a copy of the hashtable since we can't do anything with
3366 * threads while threads_mutex is held.
3369 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3370 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3371 mono_threads_lock ();
3372 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3373 mono_threads_unlock ();
3376 /* Get the suspended events that we'll be waiting for */
3377 for (i = 0; i < wait->num; ++i) {
3378 MonoInternalThread *thread = wait->threads [i];
3380 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3381 || mono_gc_is_finalizer_internal_thread (thread)
3382 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3384 mono_threads_close_thread_handle (wait->handles [i]);
3385 wait->threads [i] = NULL;
3389 LOCK_THREAD (thread);
3391 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3392 UNLOCK_THREAD (thread);
3393 mono_threads_close_thread_handle (wait->handles [i]);
3394 wait->threads [i] = NULL;
3400 /* Convert abort requests into suspend requests */
3401 if ((thread->state & ThreadState_AbortRequested) != 0)
3402 thread->state &= ~ThreadState_AbortRequested;
3404 thread->state |= ThreadState_SuspendRequested;
3405 mono_os_event_reset (thread->suspended);
3407 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3408 async_suspend_internal (thread, TRUE);
3410 mono_threads_close_thread_handle (wait->handles [i]);
3411 wait->threads [i] = NULL;
3413 if (eventidx <= 0) {
3415 * If there are threads which are starting up, we wait until they
3416 * are suspended when they try to register in the threads hash.
3417 * This is guaranteed to finish, since the threads which can create new
3418 * threads get suspended after a while.
3419 * FIXME: The finalizer thread can still create new threads.
3421 mono_threads_lock ();
3422 if (threads_starting_up)
3423 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3426 mono_threads_unlock ();
3428 mono_thread_info_sleep (100, NULL);
3436 MonoInternalThread *thread;
3437 MonoStackFrameInfo *frames;
3438 int nframes, max_frames;
3439 int nthreads, max_threads;
3440 MonoInternalThread **threads;
3441 } ThreadDumpUserData;
3443 static gboolean thread_dump_requested;
3445 /* This needs to be async safe */
3447 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3449 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3451 if (ud->nframes < ud->max_frames) {
3452 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3459 /* This needs to be async safe */
3460 static SuspendThreadResult
3461 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3463 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3464 MonoInternalThread *thread = user_data->thread;
3467 /* This no longer works with remote unwinding */
3468 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3469 mono_thread_internal_describe (thread, text);
3470 g_string_append (text, "\n");
3473 if (thread == mono_thread_internal_current ())
3474 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3476 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3478 return MonoResumeThread;
3482 int nthreads, max_threads;
3483 MonoInternalThread **threads;
3484 } CollectThreadsUserData;
3487 collect_thread (gpointer key, gpointer value, gpointer user)
3489 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3490 MonoInternalThread *thread = (MonoInternalThread *)value;
3492 if (ud->nthreads < ud->max_threads)
3493 ud->threads [ud->nthreads ++] = thread;
3497 * Collect running threads into the THREADS array.
3498 * THREADS should be an array allocated on the stack.
3501 collect_threads (MonoInternalThread **thread_array, int max_threads)
3503 CollectThreadsUserData ud;
3505 memset (&ud, 0, sizeof (ud));
3506 /* This array contains refs, but its on the stack, so its ok */
3507 ud.threads = thread_array;
3508 ud.max_threads = max_threads;
3510 mono_threads_lock ();
3511 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3512 mono_threads_unlock ();
3518 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3520 GString* text = g_string_new (0);
3522 GError *error = NULL;
3525 ud->thread = thread;
3528 /* Collect frames for the thread */
3529 if (thread == mono_thread_internal_current ()) {
3530 get_thread_dump (mono_thread_info_current (), ud);
3532 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3536 * Do all the non async-safe work outside of get_thread_dump.
3539 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3541 g_string_append_printf (text, "\n\"%s\"", name);
3544 else if (thread->threadpool_thread) {
3545 g_string_append (text, "\n\"<threadpool thread>\"");
3547 g_string_append (text, "\n\"<unnamed thread>\"");
3550 for (i = 0; i < ud->nframes; ++i) {
3551 MonoStackFrameInfo *frame = &ud->frames [i];
3552 MonoMethod *method = NULL;
3554 if (frame->type == FRAME_TYPE_MANAGED)
3555 method = mono_jit_info_get_method (frame->ji);
3558 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3559 g_string_append_printf (text, " %s\n", location);
3562 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3566 fprintf (stdout, "%s", text->str);
3568 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3569 OutputDebugStringA(text->str);
3572 g_string_free (text, TRUE);
3577 mono_threads_perform_thread_dump (void)
3579 ThreadDumpUserData ud;
3580 MonoInternalThread *thread_array [128];
3581 int tindex, nthreads;
3583 if (!thread_dump_requested)
3586 printf ("Full thread dump:\n");
3588 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3589 nthreads = collect_threads (thread_array, 128);
3591 memset (&ud, 0, sizeof (ud));
3592 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3593 ud.max_frames = 256;
3595 for (tindex = 0; tindex < nthreads; ++tindex)
3596 dump_thread (thread_array [tindex], &ud);
3600 thread_dump_requested = FALSE;
3603 /* Obtain the thread dump of all threads */
3605 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3608 ThreadDumpUserData ud;
3609 MonoInternalThread *thread_array [128];
3610 MonoDomain *domain = mono_domain_get ();
3611 MonoDebugSourceLocation *location;
3612 int tindex, nthreads;
3616 *out_threads = NULL;
3617 *out_stack_frames = NULL;
3619 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3620 nthreads = collect_threads (thread_array, 128);
3622 memset (&ud, 0, sizeof (ud));
3623 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3624 ud.max_frames = 256;
3626 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3629 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3633 for (tindex = 0; tindex < nthreads; ++tindex) {
3634 MonoInternalThread *thread = thread_array [tindex];
3635 MonoArray *thread_frames;
3641 /* Collect frames for the thread */
3642 if (thread == mono_thread_internal_current ()) {
3643 get_thread_dump (mono_thread_info_current (), &ud);
3645 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3648 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3650 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3653 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3655 for (i = 0; i < ud.nframes; ++i) {
3656 MonoStackFrameInfo *frame = &ud.frames [i];
3657 MonoMethod *method = NULL;
3658 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3662 sf->native_offset = frame->native_offset;
3664 if (frame->type == FRAME_TYPE_MANAGED)
3665 method = mono_jit_info_get_method (frame->ji);
3668 sf->method_address = (gsize) frame->ji->code_start;
3670 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3673 MONO_OBJECT_SETREF (sf, method, rm);
3675 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3677 sf->il_offset = location->il_offset;
3679 if (location && location->source_file) {
3680 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3681 sf->line = location->row;
3682 sf->column = location->column;
3684 mono_debug_free_source_location (location);
3689 mono_array_setref (thread_frames, i, sf);
3695 return is_ok (error);
3699 * mono_threads_request_thread_dump:
3701 * Ask all threads except the current to print their stacktrace to stdout.
3704 mono_threads_request_thread_dump (void)
3706 /*The new thread dump code runs out of the finalizer thread. */
3707 thread_dump_requested = TRUE;
3708 mono_gc_finalize_notify ();
3713 gint allocated; /* +1 so that refs [allocated] == NULL */
3717 typedef struct ref_stack RefStack;
3720 ref_stack_new (gint initial_size)
3724 initial_size = MAX (initial_size, 16) + 1;
3725 rs = g_new0 (RefStack, 1);
3726 rs->refs = g_new0 (gpointer, initial_size);
3727 rs->allocated = initial_size;
3732 ref_stack_destroy (gpointer ptr)
3734 RefStack *rs = (RefStack *)ptr;
3743 ref_stack_push (RefStack *rs, gpointer ptr)
3745 g_assert (rs != NULL);
3747 if (rs->bottom >= rs->allocated) {
3748 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3749 rs->allocated <<= 1;
3750 rs->refs [rs->allocated] = NULL;
3752 rs->refs [rs->bottom++] = ptr;
3756 ref_stack_pop (RefStack *rs)
3758 if (rs == NULL || rs->bottom == 0)
3762 rs->refs [rs->bottom] = NULL;
3766 ref_stack_find (RefStack *rs, gpointer ptr)
3773 for (refs = rs->refs; refs && *refs; refs++) {
3781 * mono_thread_push_appdomain_ref:
3783 * Register that the current thread may have references to objects in domain
3784 * @domain on its stack. Each call to this function should be paired with a
3785 * call to pop_appdomain_ref.
3788 mono_thread_push_appdomain_ref (MonoDomain *domain)
3790 MonoInternalThread *thread = mono_thread_internal_current ();
3793 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3794 SPIN_LOCK (thread->lock_thread_id);
3795 if (thread->appdomain_refs == NULL)
3796 thread->appdomain_refs = ref_stack_new (16);
3797 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3798 SPIN_UNLOCK (thread->lock_thread_id);
3803 mono_thread_pop_appdomain_ref (void)
3805 MonoInternalThread *thread = mono_thread_internal_current ();
3808 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3809 SPIN_LOCK (thread->lock_thread_id);
3810 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3811 SPIN_UNLOCK (thread->lock_thread_id);
3816 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3819 SPIN_LOCK (thread->lock_thread_id);
3820 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3821 SPIN_UNLOCK (thread->lock_thread_id);
3826 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3828 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3831 typedef struct abort_appdomain_data {
3832 struct wait_data wait;
3834 } abort_appdomain_data;
3837 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3839 MonoInternalThread *thread = (MonoInternalThread*)value;
3840 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3841 MonoDomain *domain = data->domain;
3843 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3844 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3846 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3847 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3848 data->wait.threads [data->wait.num] = thread;
3851 /* Just ignore the rest, we can't do anything with
3859 * mono_threads_abort_appdomain_threads:
3861 * Abort threads which has references to the given appdomain.
3864 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3866 #ifdef __native_client__
3870 abort_appdomain_data user_data;
3872 int orig_timeout = timeout;
3875 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3877 start_time = mono_msec_ticks ();
3879 mono_threads_lock ();
3881 user_data.domain = domain;
3882 user_data.wait.num = 0;
3883 /* This shouldn't take any locks */
3884 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3885 mono_threads_unlock ();
3887 if (user_data.wait.num > 0) {
3888 /* Abort the threads outside the threads lock */
3889 for (i = 0; i < user_data.wait.num; ++i)
3890 mono_thread_internal_abort (user_data.wait.threads [i]);
3893 * We should wait for the threads either to abort, or to leave the
3894 * domain. We can't do the latter, so we wait with a timeout.
3896 wait_for_tids (&user_data.wait, 100, FALSE);
3899 /* Update remaining time */
3900 timeout -= mono_msec_ticks () - start_time;
3901 start_time = mono_msec_ticks ();
3903 if (orig_timeout != -1 && timeout < 0)
3906 while (user_data.wait.num > 0);
3908 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3914 * mono_thread_get_undeniable_exception:
3916 * Return an exception which needs to be raised when leaving a catch clause.
3917 * This is used for undeniable exception propagation.
3920 mono_thread_get_undeniable_exception (void)
3922 MonoInternalThread *thread = mono_thread_internal_current ();
3924 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3927 // We don't want to have our exception effect calls made by
3928 // the catching block
3930 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3934 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3935 * exception if the thread no longer references a dying appdomain.
3937 thread->abort_exc->trace_ips = NULL;
3938 thread->abort_exc->stack_trace = NULL;
3939 return thread->abort_exc;
3942 #if MONO_SMALL_CONFIG
3943 #define NUM_STATIC_DATA_IDX 4
3944 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3948 #define NUM_STATIC_DATA_IDX 8
3949 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3950 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3954 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3955 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3958 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3960 gpointer *static_data = (gpointer *)addr;
3962 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3963 void **ptr = (void **)static_data [i];
3968 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3969 void **p = ptr + idx;
3972 mark_func ((MonoObject**)p, gc_data);
3978 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3980 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3984 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3986 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3990 * mono_alloc_static_data
3992 * Allocate memory blocks for storing threads or context static data
3995 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3997 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4000 gpointer* static_data = *static_data_ptr;
4002 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4003 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4005 if (mono_gc_user_markers_supported ()) {
4006 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4007 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4009 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4010 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4013 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4014 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4015 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4016 *static_data_ptr = static_data;
4017 static_data [0] = static_data;
4020 for (i = 1; i <= idx; ++i) {
4021 if (static_data [i])
4024 if (mono_gc_user_markers_supported ())
4025 static_data [i] = g_malloc0 (static_data_size [i]);
4027 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4028 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4029 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4034 mono_free_static_data (gpointer* static_data)
4037 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4038 gpointer p = static_data [i];
4042 * At this point, the static data pointer array is still registered with the
4043 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4044 * data. Freeing the individual arrays without first nulling their slots
4045 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4046 * such an already freed array. See bug #13813.
4048 static_data [i] = NULL;
4049 mono_memory_write_barrier ();
4050 if (mono_gc_user_markers_supported ())
4053 mono_gc_free_fixed (p);
4055 mono_gc_free_fixed (static_data);
4059 * mono_init_static_data_info
4061 * Initializes static data counters
4063 static void mono_init_static_data_info (StaticDataInfo *static_data)
4065 static_data->idx = 0;
4066 static_data->offset = 0;
4067 static_data->freelist = NULL;
4071 * mono_alloc_static_data_slot
4073 * Generates an offset for static data. static_data contains the counters
4074 * used to generate it.
4077 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4079 if (!static_data->idx && !static_data->offset) {
4081 * we use the first chunk of the first allocation also as
4082 * an array for the rest of the data
4084 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4086 static_data->offset += align - 1;
4087 static_data->offset &= ~(align - 1);
4088 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4089 static_data->idx ++;
4090 g_assert (size <= static_data_size [static_data->idx]);
4091 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4092 static_data->offset = 0;
4094 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4095 static_data->offset += size;
4100 * LOCKING: requires that threads_mutex is held
4103 context_adjust_static_data (MonoAppContext *ctx)
4105 if (context_static_info.offset || context_static_info.idx > 0) {
4106 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4107 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4108 ctx->data->static_data = ctx->static_data;
4113 * LOCKING: requires that threads_mutex is held
4116 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4118 MonoInternalThread *thread = (MonoInternalThread *)value;
4119 guint32 offset = GPOINTER_TO_UINT (user);
4121 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4125 * LOCKING: requires that threads_mutex is held
4128 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4130 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4135 guint32 offset = GPOINTER_TO_UINT (user);
4136 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4137 ctx->data->static_data = ctx->static_data;
4140 static StaticDataFreeList*
4141 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4143 StaticDataFreeList* prev = NULL;
4144 StaticDataFreeList* tmp = static_data->freelist;
4146 if (tmp->size == size) {
4148 prev->next = tmp->next;
4150 static_data->freelist = tmp->next;
4159 #if SIZEOF_VOID_P == 4
4166 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4168 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4170 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4171 MonoBitSet *rb = sets [idx];
4172 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4173 offset /= sizeof (uintptr_t);
4174 /* offset is now the bitmap offset */
4175 for (int i = 0; i < numbits; ++i) {
4176 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4177 mono_bitset_set_fast (rb, offset + i);
4182 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4184 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4185 MonoBitSet *rb = sets [idx];
4186 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4187 offset /= sizeof (uintptr_t);
4188 /* offset is now the bitmap offset */
4189 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4190 mono_bitset_clear_fast (rb, offset + i);
4194 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4196 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4198 StaticDataInfo *info;
4201 if (static_type == SPECIAL_STATIC_THREAD) {
4202 info = &thread_static_info;
4203 sets = thread_reference_bitmaps;
4205 info = &context_static_info;
4206 sets = context_reference_bitmaps;
4209 mono_threads_lock ();
4211 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4215 offset = item->offset;
4218 offset = mono_alloc_static_data_slot (info, size, align);
4221 update_reference_bitmap (sets, offset, bitmap, numbits);
4223 if (static_type == SPECIAL_STATIC_THREAD) {
4224 /* This can be called during startup */
4225 if (threads != NULL)
4226 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4228 if (contexts != NULL)
4229 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4231 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4234 mono_threads_unlock ();
4240 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4242 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4244 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4245 return get_thread_static_data (thread, offset);
4247 return get_context_static_data (thread->current_appcontext, offset);
4252 mono_get_special_static_data (guint32 offset)
4254 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4263 * LOCKING: requires that threads_mutex is held
4266 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4268 MonoInternalThread *thread = (MonoInternalThread *)value;
4269 OffsetSize *data = (OffsetSize *)user;
4270 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4271 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4274 if (!thread->static_data || !thread->static_data [idx])
4276 ptr = ((char*) thread->static_data [idx]) + off;
4277 mono_gc_bzero_atomic (ptr, data->size);
4281 * LOCKING: requires that threads_mutex is held
4284 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4286 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4291 OffsetSize *data = (OffsetSize *)user;
4292 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4293 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4296 if (!ctx->static_data || !ctx->static_data [idx])
4299 ptr = ((char*) ctx->static_data [idx]) + off;
4300 mono_gc_bzero_atomic (ptr, data->size);
4304 do_free_special_slot (guint32 offset, guint32 size)
4306 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4308 StaticDataInfo *info;
4310 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4311 info = &thread_static_info;
4312 sets = thread_reference_bitmaps;
4314 info = &context_static_info;
4315 sets = context_reference_bitmaps;
4318 guint32 data_offset = offset;
4319 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4320 OffsetSize data = { data_offset, size };
4322 clear_reference_bitmap (sets, data.offset, data.size);
4324 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4325 if (threads != NULL)
4326 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4328 if (contexts != NULL)
4329 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4332 if (!mono_runtime_is_shutting_down ()) {
4333 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4335 item->offset = offset;
4338 item->next = info->freelist;
4339 info->freelist = item;
4344 do_free_special (gpointer key, gpointer value, gpointer data)
4346 MonoClassField *field = (MonoClassField *)key;
4347 guint32 offset = GPOINTER_TO_UINT (value);
4350 size = mono_type_size (field->type, &align);
4351 do_free_special_slot (offset, size);
4355 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4357 mono_threads_lock ();
4359 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4361 mono_threads_unlock ();
4365 static void CALLBACK dummy_apc (ULONG_PTR param)
4371 * mono_thread_execute_interruption
4373 * Performs the operation that the requested thread state requires (abort,
4376 static MonoException*
4377 mono_thread_execute_interruption (void)
4379 MonoInternalThread *thread = mono_thread_internal_current ();
4380 MonoThread *sys_thread = mono_thread_current ();
4382 LOCK_THREAD (thread);
4384 /* MonoThread::interruption_requested can only be changed with atomics */
4385 if (mono_thread_clear_interruption_requested (thread)) {
4386 /* this will consume pending APC calls */
4388 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4390 InterlockedDecrement (&thread_interruption_requested);
4392 /* Clear the interrupted flag of the thread so it can wait again */
4393 mono_thread_info_clear_self_interrupt ();
4396 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4397 if (sys_thread->pending_exception) {
4400 exc = sys_thread->pending_exception;
4401 sys_thread->pending_exception = NULL;
4403 UNLOCK_THREAD (thread);
4405 } else if (thread->state & (ThreadState_AbortRequested)) {
4406 UNLOCK_THREAD (thread);
4407 g_assert (sys_thread->pending_exception == NULL);
4408 if (thread->abort_exc == NULL) {
4410 * This might be racy, but it has to be called outside the lock
4411 * since it calls managed code.
4413 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4415 return thread->abort_exc;
4416 } else if (thread->state & (ThreadState_SuspendRequested)) {
4417 /* calls UNLOCK_THREAD (thread) */
4418 self_suspend_internal ();
4420 } else if (thread->thread_interrupt_requested) {
4422 thread->thread_interrupt_requested = FALSE;
4423 UNLOCK_THREAD (thread);
4425 return(mono_get_exception_thread_interrupted ());
4428 UNLOCK_THREAD (thread);
4434 * mono_thread_request_interruption
4436 * A signal handler can call this method to request the interruption of a
4437 * thread. The result of the interruption will depend on the current state of
4438 * the thread. If the result is an exception that needs to be throw, it is
4439 * provided as return value.
4442 mono_thread_request_interruption (gboolean running_managed)
4444 MonoInternalThread *thread = mono_thread_internal_current ();
4446 /* The thread may already be stopping */
4450 if (!mono_thread_set_interruption_requested (thread))
4452 InterlockedIncrement (&thread_interruption_requested);
4454 if (!running_managed || is_running_protected_wrapper ()) {
4455 /* Can't stop while in unmanaged code. Increase the global interruption
4456 request count. When exiting the unmanaged method the count will be
4457 checked and the thread will be interrupted. */
4459 /* this will awake the thread if it is in WaitForSingleObject
4461 /* Our implementation of this function ignores the func argument */
4463 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4465 mono_thread_info_self_interrupt ();
4470 return mono_thread_execute_interruption ();
4474 /*This function should be called by a thread after it has exited all of
4475 * its handle blocks at interruption time.*/
4477 mono_thread_resume_interruption (void)
4479 MonoInternalThread *thread = mono_thread_internal_current ();
4480 gboolean still_aborting;
4482 /* The thread may already be stopping */
4486 LOCK_THREAD (thread);
4487 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4488 UNLOCK_THREAD (thread);
4490 /*This can happen if the protected block called Thread::ResetAbort*/
4491 if (!still_aborting)
4494 if (!mono_thread_set_interruption_requested (thread))
4496 InterlockedIncrement (&thread_interruption_requested);
4498 mono_thread_info_self_interrupt ();
4500 return mono_thread_execute_interruption ();
4503 gboolean mono_thread_interruption_requested ()
4505 if (thread_interruption_requested) {
4506 MonoInternalThread *thread = mono_thread_internal_current ();
4507 /* The thread may already be stopping */
4509 return mono_thread_get_interruption_requested (thread);
4514 static MonoException*
4515 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4517 MonoInternalThread *thread = mono_thread_internal_current ();
4519 /* The thread may already be stopping */
4522 if (!mono_thread_get_interruption_requested (thread))
4524 if (!bypass_abort_protection && is_running_protected_wrapper ())
4527 return mono_thread_execute_interruption ();
4531 * Performs the interruption of the current thread, if one has been requested,
4532 * and the thread is not running a protected wrapper.
4533 * Return the exception which needs to be thrown, if any.
4536 mono_thread_interruption_checkpoint (void)
4538 return mono_thread_interruption_checkpoint_request (FALSE);
4542 * Performs the interruption of the current thread, if one has been requested.
4543 * Return the exception which needs to be thrown, if any.
4546 mono_thread_force_interruption_checkpoint_noraise (void)
4548 return mono_thread_interruption_checkpoint_request (TRUE);
4552 * mono_set_pending_exception:
4554 * Set the pending exception of the current thread to EXC.
4555 * The exception will be thrown when execution returns to managed code.
4558 mono_set_pending_exception (MonoException *exc)
4560 MonoThread *thread = mono_thread_current ();
4562 /* The thread may already be stopping */
4566 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4568 mono_thread_request_interruption (FALSE);
4572 * mono_thread_interruption_request_flag:
4574 * Returns the address of a flag that will be non-zero if an interruption has
4575 * been requested for a thread. The thread to interrupt may not be the current
4576 * thread, so an additional call to mono_thread_interruption_requested() or
4577 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4580 gint32* mono_thread_interruption_request_flag ()
4582 return &thread_interruption_requested;
4586 mono_thread_init_apartment_state (void)
4589 MonoInternalThread* thread = mono_thread_internal_current ();
4591 /* Positive return value indicates success, either
4592 * S_OK if this is first CoInitialize call, or
4593 * S_FALSE if CoInitialize already called, but with same
4594 * threading model. A negative value indicates failure,
4595 * probably due to trying to change the threading model.
4597 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4598 ? COINIT_APARTMENTTHREADED
4599 : COINIT_MULTITHREADED) < 0) {
4600 thread->apartment_state = ThreadApartmentState_Unknown;
4606 mono_thread_cleanup_apartment_state (void)
4609 MonoInternalThread* thread = mono_thread_internal_current ();
4611 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4618 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4620 LOCK_THREAD (thread);
4621 thread->state |= state;
4622 UNLOCK_THREAD (thread);
4626 * mono_thread_test_and_set_state:
4628 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4630 * Returns TRUE is @set was OR'd in.
4633 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4635 LOCK_THREAD (thread);
4637 if ((thread->state & test) != 0) {
4638 UNLOCK_THREAD (thread);
4642 thread->state |= set;
4643 UNLOCK_THREAD (thread);
4649 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4651 LOCK_THREAD (thread);
4652 thread->state &= ~state;
4653 UNLOCK_THREAD (thread);
4657 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4659 gboolean ret = FALSE;
4661 LOCK_THREAD (thread);
4663 if ((thread->state & test) != 0) {
4667 UNLOCK_THREAD (thread);
4673 self_interrupt_thread (void *_unused)
4676 MonoThreadInfo *info;
4678 exc = mono_thread_execute_interruption ();
4680 if (mono_threads_is_coop_enabled ()) {
4681 /* We can return from an async call in coop, as
4682 * it's simply called when exiting the safepoint */
4686 g_error ("%s: we can't resume from an async call", __func__);
4689 info = mono_thread_info_current ();
4691 /* We must use _with_context since we didn't trampoline into the runtime */
4692 mono_raise_exception_with_context (exc, &info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX].ctx); /* FIXME using thread_saved_state [ASYNC_SUSPEND_STATE_INDEX] can race with another suspend coming in. */
4696 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4700 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4704 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4706 MonoJitInfo **dest = (MonoJitInfo **)data;
4712 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4714 MonoJitInfo *ji = NULL;
4719 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4720 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4721 * where we hold runtime locks.
4723 if (!mono_threads_is_coop_enabled ())
4724 mono_thread_info_set_is_async_context (TRUE);
4725 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4726 if (!mono_threads_is_coop_enabled ())
4727 mono_thread_info_set_is_async_context (FALSE);
4732 MonoInternalThread *thread;
4733 gboolean install_async_abort;
4734 MonoThreadInfoInterruptToken *interrupt_token;
4737 static SuspendThreadResult
4738 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4740 AbortThreadData *data = (AbortThreadData *)ud;
4741 MonoInternalThread *thread = data->thread;
4742 MonoJitInfo *ji = NULL;
4743 gboolean protected_wrapper;
4744 gboolean running_managed;
4746 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4747 return MonoResumeThread;
4749 /*someone is already interrupting it*/
4750 if (!mono_thread_set_interruption_requested (thread))
4751 return MonoResumeThread;
4753 InterlockedIncrement (&thread_interruption_requested);
4755 ji = mono_thread_info_get_last_managed (info);
4756 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4757 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4759 if (!protected_wrapper && running_managed) {
4760 /*We are in managed code*/
4761 /*Set the thread to call */
4762 if (data->install_async_abort)
4763 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4764 return MonoResumeThread;
4767 * This will cause waits to be broken.
4768 * It will also prevent the thread from entering a wait, so if the thread returns
4769 * from the wait before it receives the abort signal, it will just spin in the wait
4770 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4773 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4775 return MonoResumeThread;
4780 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4782 AbortThreadData data;
4784 g_assert (thread != mono_thread_internal_current ());
4786 data.thread = thread;
4787 data.install_async_abort = install_async_abort;
4788 data.interrupt_token = NULL;
4790 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4791 if (data.interrupt_token)
4792 mono_thread_info_finish_interrupt (data.interrupt_token);
4793 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4797 self_abort_internal (MonoError *error)
4803 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4804 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4807 Self aborts ignore the protected block logic and raise the TAE regardless. This is verified by one of the tests in mono/tests/abort-cctor.cs.
4809 exc = mono_thread_request_interruption (TRUE);
4811 mono_error_set_exception_instance (error, exc);
4813 mono_thread_info_self_interrupt ();
4817 MonoInternalThread *thread;
4819 MonoThreadInfoInterruptToken *interrupt_token;
4820 } SuspendThreadData;
4822 static SuspendThreadResult
4823 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4825 SuspendThreadData *data = (SuspendThreadData *)ud;
4826 MonoInternalThread *thread = data->thread;
4827 MonoJitInfo *ji = NULL;
4828 gboolean protected_wrapper;
4829 gboolean running_managed;
4831 ji = mono_thread_info_get_last_managed (info);
4832 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4833 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4835 if (running_managed && !protected_wrapper) {
4836 if (mono_threads_is_coop_enabled ()) {
4837 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4838 return MonoResumeThread;
4840 thread->state &= ~ThreadState_SuspendRequested;
4841 thread->state |= ThreadState_Suspended;
4842 return KeepSuspended;
4845 if (mono_thread_set_interruption_requested (thread))
4846 InterlockedIncrement (&thread_interruption_requested);
4847 if (data->interrupt)
4848 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4850 return MonoResumeThread;
4854 /* LOCKING: called with @thread synch_cs held, and releases it */
4856 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4858 SuspendThreadData data;
4860 g_assert (thread != mono_thread_internal_current ());
4862 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4864 thread->self_suspended = FALSE;
4866 data.thread = thread;
4867 data.interrupt = interrupt;
4868 data.interrupt_token = NULL;
4870 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4871 if (data.interrupt_token)
4872 mono_thread_info_finish_interrupt (data.interrupt_token);
4874 UNLOCK_THREAD (thread);
4877 /* LOCKING: called with @thread synch_cs held, and releases it */
4879 self_suspend_internal (void)
4881 MonoInternalThread *thread;
4883 MonoOSEventWaitRet res;
4885 thread = mono_thread_internal_current ();
4887 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4889 thread->self_suspended = TRUE;
4891 thread->state &= ~ThreadState_SuspendRequested;
4892 thread->state |= ThreadState_Suspended;
4894 UNLOCK_THREAD (thread);
4896 event = thread->suspended;
4899 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4900 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4905 suspend_for_shutdown_async_call (gpointer unused)
4908 mono_thread_info_yield ();
4911 static SuspendThreadResult
4912 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4914 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4915 return MonoResumeThread;
4919 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4921 g_assert (thread != mono_thread_internal_current ());
4923 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4927 * mono_thread_is_foreign:
4928 * @thread: the thread to query
4930 * This function allows one to determine if a thread was created by the mono runtime and has
4931 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4933 * Returns: TRUE if @thread was not created by the runtime.
4936 mono_thread_is_foreign (MonoThread *thread)
4938 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4939 return info->runtime_thread == FALSE;
4943 * mono_add_joinable_thread:
4945 * Add TID to the list of joinable threads.
4946 * LOCKING: Acquires the threads lock.
4949 mono_threads_add_joinable_thread (gpointer tid)
4953 * We cannot detach from threads because it causes problems like
4954 * 2fd16f60/r114307. So we collect them and join them when
4955 * we have time (in he finalizer thread).
4957 joinable_threads_lock ();
4958 if (!joinable_threads)
4959 joinable_threads = g_hash_table_new (NULL, NULL);
4960 g_hash_table_insert (joinable_threads, tid, tid);
4961 joinable_thread_count ++;
4962 joinable_threads_unlock ();
4964 mono_gc_finalize_notify ();
4969 * mono_threads_join_threads:
4971 * Join all joinable threads. This is called from the finalizer thread.
4972 * LOCKING: Acquires the threads lock.
4975 mono_threads_join_threads (void)
4978 GHashTableIter iter;
4985 if (!joinable_thread_count)
4989 joinable_threads_lock ();
4991 if (g_hash_table_size (joinable_threads)) {
4992 g_hash_table_iter_init (&iter, joinable_threads);
4993 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4994 thread = (pthread_t)tid;
4995 g_hash_table_remove (joinable_threads, key);
4996 joinable_thread_count --;
4999 joinable_threads_unlock ();
5001 if (thread != pthread_self ()) {
5003 /* This shouldn't block */
5004 mono_threads_join_lock ();
5005 mono_native_thread_join (thread);
5006 mono_threads_join_unlock ();
5019 * Wait for thread TID to exit.
5020 * LOCKING: Acquires the threads lock.
5023 mono_thread_join (gpointer tid)
5027 gboolean found = FALSE;
5029 joinable_threads_lock ();
5030 if (!joinable_threads)
5031 joinable_threads = g_hash_table_new (NULL, NULL);
5032 if (g_hash_table_lookup (joinable_threads, tid)) {
5033 g_hash_table_remove (joinable_threads, tid);
5034 joinable_thread_count --;
5037 joinable_threads_unlock ();
5040 thread = (pthread_t)tid;
5042 mono_native_thread_join (thread);
5048 mono_thread_internal_unhandled_exception (MonoObject* exc)
5050 MonoClass *klass = exc->vtable->klass;
5051 if (is_threadabort_exception (klass)) {
5052 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5053 } else if (!is_appdomainunloaded_exception (klass)
5054 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5055 mono_unhandled_exception (exc);
5056 if (mono_environment_exitcode_get () == 1) {
5057 mono_environment_exitcode_set (255);
5058 mono_invoke_unhandled_exception_hook (exc);
5059 g_assert_not_reached ();
5065 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5068 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5069 mono_error_set_pending_exception (&error);
5073 * mono_threads_attach_coop: called by native->managed wrappers
5077 * - @return: the original domain which needs to be restored, or NULL.
5080 * - @dummy: contains the original domain
5081 * - @return: a cookie containing current MonoThreadInfo*.
5084 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5087 gboolean fresh_thread = FALSE;
5090 /* Happens when called from AOTed code which is only used in the root domain. */
5091 domain = mono_get_root_domain ();
5096 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5097 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5098 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5099 * we're only responsible for making the cookie. */
5100 if (mono_threads_is_coop_enabled ()) {
5101 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5102 fresh_thread = !info || !mono_thread_info_is_live (info);
5105 if (!mono_thread_internal_current ()) {
5106 mono_thread_attach_full (domain, FALSE);
5109 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5112 orig = mono_domain_get ();
5114 mono_domain_set (domain, TRUE);
5116 if (!mono_threads_is_coop_enabled ())
5117 return orig != domain ? orig : NULL;
5121 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5122 * return the right cookie. */
5123 return mono_threads_enter_gc_unsafe_region_cookie ();
5126 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5127 return mono_threads_enter_gc_unsafe_region (dummy);
5132 * mono_threads_detach_coop: called by native->managed wrappers
5135 * - @cookie: the original domain which needs to be restored, or NULL.
5139 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5140 * - @dummy: contains the original domain
5143 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5145 MonoDomain *domain, *orig;
5147 if (!mono_threads_is_coop_enabled ()) {
5148 orig = (MonoDomain*) cookie;
5150 mono_domain_set (orig, TRUE);
5152 orig = (MonoDomain*) *dummy;
5154 domain = mono_domain_get ();
5157 /* it won't do anything if cookie is NULL
5158 * thread state RUNNING -> (RUNNING|BLOCKING) */
5159 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5161 if (orig != domain) {
5163 mono_domain_unset ();
5165 mono_domain_set (orig, TRUE);
5171 mono_thread_try_resume_interruption (void)
5173 MonoInternalThread *thread;
5175 thread = mono_thread_internal_current ();
5176 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
5178 if (mono_thread_get_abort_prot_block_count (thread) > 0 || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5181 return mono_thread_resume_interruption ();
5185 /* Returns TRUE if the current thread is ready to be interrupted. */
5187 mono_threads_is_ready_to_be_interrupted (void)
5189 MonoInternalThread *thread;
5191 thread = mono_thread_internal_current ();
5192 LOCK_THREAD (thread);
5193 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5194 UNLOCK_THREAD (thread);
5198 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5199 UNLOCK_THREAD (thread);
5203 UNLOCK_THREAD (thread);
5209 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5211 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5213 if (internal->thread_info) {
5214 g_string_append (text, ", state : ");
5215 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5218 if (internal->owned_mutexes) {
5221 g_string_append (text, ", owns : [");
5222 for (i = 0; i < internal->owned_mutexes->len; i++)
5223 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5224 g_string_append (text, "]");
5229 mono_thread_internal_is_current (MonoInternalThread *internal)
5231 g_assert (internal);
5232 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));