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 * We separate interruptions/exceptions into either sync (they can be processed anytime,
224 * normally as soon as they are set, and are set by the same thread) and async (they can't
225 * be processed inside abort protected blocks and are normally set by other threads). We
226 * can have both a pending sync and async interruption. In this case, the sync exception is
227 * processed first. Since we clean sync flag first, mono_thread_execute_interruption must
228 * also handle all sync type exceptions before the async type exceptions.
231 INTERRUPT_SYNC_REQUESTED_BIT = 0x1,
232 INTERRUPT_ASYNC_REQUESTED_BIT = 0x2,
233 INTERRUPT_REQUESTED_MASK = 0x3,
234 ABORT_PROT_BLOCK_SHIFT = 2,
235 ABORT_PROT_BLOCK_BITS = 8,
236 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
240 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
242 gsize state = thread->thread_state;
243 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
247 mono_threads_begin_abort_protected_block (void)
249 MonoInternalThread *thread = mono_thread_internal_current ();
250 gsize old_state, new_state;
253 old_state = thread->thread_state;
255 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
256 //bounds check abort_prot_count
257 g_assert (new_val > 0);
258 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
260 new_state = old_state + (1 << ABORT_PROT_BLOCK_SHIFT);
261 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
265 mono_thread_state_has_interruption (gsize state)
267 /* pending exception, self abort */
268 if (state & INTERRUPT_SYNC_REQUESTED_BIT)
271 /* abort, interruption, suspend */
272 if ((state & INTERRUPT_ASYNC_REQUESTED_BIT) && !(state & ABORT_PROT_BLOCK_MASK))
279 mono_threads_end_abort_protected_block (void)
281 MonoInternalThread *thread = mono_thread_internal_current ();
282 gsize old_state, new_state;
284 old_state = thread->thread_state;
286 //bounds check abort_prot_count
287 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
288 g_assert (new_val >= 0);
289 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
291 new_state = old_state - (1 << ABORT_PROT_BLOCK_SHIFT);
292 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
294 return mono_thread_state_has_interruption (new_state);
298 mono_thread_get_interruption_requested (MonoInternalThread *thread)
300 gsize state = thread->thread_state;
302 return mono_thread_state_has_interruption (state);
306 * Returns TRUE is there was a state change
307 * We clear a single interruption request, sync has priority.
310 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
312 gsize old_state, new_state;
314 old_state = thread->thread_state;
316 // no interruption to process
317 if (!(old_state & INTERRUPT_SYNC_REQUESTED_BIT) &&
318 (!(old_state & INTERRUPT_ASYNC_REQUESTED_BIT) || (old_state & ABORT_PROT_BLOCK_MASK)))
321 if (old_state & INTERRUPT_SYNC_REQUESTED_BIT)
322 new_state = old_state & ~INTERRUPT_SYNC_REQUESTED_BIT;
324 new_state = old_state & ~INTERRUPT_ASYNC_REQUESTED_BIT;
325 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
327 InterlockedDecrement (&thread_interruption_requested);
332 /* Returns TRUE is there was a state change and the interruption can be processed */
334 mono_thread_set_interruption_requested (MonoInternalThread *thread)
336 //always force when the current thread is doing it to itself.
337 gboolean sync = thread == mono_thread_internal_current ();
338 gsize old_state, new_state;
340 old_state = thread->thread_state;
343 if ((sync && (old_state & INTERRUPT_SYNC_REQUESTED_BIT)) ||
344 (!sync && (old_state & INTERRUPT_ASYNC_REQUESTED_BIT)))
348 new_state = old_state | INTERRUPT_SYNC_REQUESTED_BIT;
350 new_state = old_state | INTERRUPT_ASYNC_REQUESTED_BIT;
351 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
353 InterlockedIncrement (&thread_interruption_requested);
355 return sync || !(new_state & ABORT_PROT_BLOCK_MASK);
358 static inline MonoNativeThreadId
359 thread_get_tid (MonoInternalThread *thread)
361 /* We store the tid as a guint64 to keep the object layout constant between platforms */
362 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
365 static void ensure_synch_cs_set (MonoInternalThread *thread)
367 MonoCoopMutex *synch_cs;
369 if (thread->synch_cs != NULL) {
373 synch_cs = g_new0 (MonoCoopMutex, 1);
374 mono_coop_mutex_init_recursive (synch_cs);
376 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
377 synch_cs, NULL) != NULL) {
378 /* Another thread must have installed this CS */
379 mono_coop_mutex_destroy (synch_cs);
385 lock_thread (MonoInternalThread *thread)
387 if (!thread->synch_cs)
388 ensure_synch_cs_set (thread);
390 g_assert (thread->synch_cs);
392 mono_coop_mutex_lock (thread->synch_cs);
396 unlock_thread (MonoInternalThread *thread)
398 mono_coop_mutex_unlock (thread->synch_cs);
401 static inline gboolean
402 is_appdomainunloaded_exception (MonoClass *klass)
404 return klass == mono_class_get_appdomain_unloaded_exception_class ();
407 static inline gboolean
408 is_threadabort_exception (MonoClass *klass)
410 return klass == mono_defaults.threadabortexception_class;
414 * A special static data offset (guint32) consists of 3 parts:
416 * [0] 6-bit index into the array of chunks.
417 * [6] 25-bit offset into the array.
418 * [31] Bit indicating thread or context static.
423 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
434 } SpecialStaticOffset;
436 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
437 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
439 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
440 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
441 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
442 (((SpecialStaticOffset *) &(x))->fields.f)
445 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
447 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
449 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
450 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
452 return ((char *) thread->static_data [idx]) + off;
456 get_context_static_data (MonoAppContext *ctx, guint32 offset)
458 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
460 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
461 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
463 return ((char *) ctx->static_data [idx]) + off;
467 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
469 static MonoClassField *current_thread_field = NULL;
473 if (!current_thread_field) {
474 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
475 g_assert (current_thread_field);
478 mono_class_vtable (domain, mono_defaults.thread_class);
479 mono_domain_lock (domain);
480 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
481 mono_domain_unlock (domain);
484 return (MonoThread **)get_thread_static_data (thread, offset);
488 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
490 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
492 g_assert (current->obj.vtable->domain == domain);
494 g_assert (!*current_thread_ptr);
495 *current_thread_ptr = current;
499 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
505 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
508 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
509 /* only possible failure mode is OOM, from which we don't expect to recover. */
510 mono_error_assert_ok (&error);
512 MONO_OBJECT_SETREF (thread, internal_thread, internal);
517 static MonoInternalThread*
518 create_internal_thread_object (void)
521 MonoInternalThread *thread;
524 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
525 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
526 /* only possible failure mode is OOM, from which we don't exect to recover */
527 mono_error_assert_ok (&error);
529 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
530 mono_coop_mutex_init_recursive (thread->synch_cs);
532 thread->apartment_state = ThreadApartmentState_Unknown;
533 thread->managed_id = get_next_managed_thread_id ();
534 if (mono_gc_is_moving ()) {
535 thread->thread_pinning_ref = thread;
536 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
539 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
541 thread->suspended = g_new0 (MonoOSEvent, 1);
542 mono_os_event_init (thread->suspended, TRUE);
548 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
552 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
553 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
554 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
559 g_assert (internal->native_handle);
561 res = SetThreadPriority (internal->native_handle, priority - 2);
563 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
564 #else /* HOST_WIN32 */
567 struct sched_param param;
570 tid = thread_get_tid (internal);
572 res = pthread_getschedparam (tid, &policy, ¶m);
574 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
576 #ifdef _POSIX_PRIORITY_SCHEDULING
579 /* Necessary to get valid priority range */
581 min = sched_get_priority_min (policy);
582 max = sched_get_priority_max (policy);
584 if (max > 0 && min >= 0 && max > min) {
585 double srange, drange, sposition, dposition;
586 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
588 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
589 dposition = (sposition / srange) * drange;
590 param.sched_priority = (int)(dposition + min);
597 param.sched_priority = 50;
603 param.sched_priority = 0;
606 g_warning ("%s: unknown policy %d", __func__, policy);
611 res = pthread_setschedparam (tid, policy, ¶m);
614 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
617 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
619 #endif /* HOST_WIN32 */
623 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
626 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
628 MonoThreadInfo *info;
629 MonoInternalThread *internal;
630 MonoDomain *domain, *root_domain;
634 info = mono_thread_info_current ();
636 internal = thread->internal_thread;
637 internal->handle = mono_threads_open_thread_handle (info->handle);
639 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
641 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
642 internal->thread_info = info;
643 internal->small_id = info->small_id;
645 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
647 SET_CURRENT_OBJECT (internal);
649 domain = mono_object_domain (thread);
651 mono_thread_push_appdomain_ref (domain);
652 if (!mono_domain_set (domain, force_domain)) {
653 mono_thread_pop_appdomain_ref ();
657 mono_threads_lock ();
659 if (threads_starting_up)
660 mono_g_hash_table_remove (threads_starting_up, thread);
662 if (shutting_down && !force_attach) {
663 mono_threads_unlock ();
664 mono_thread_pop_appdomain_ref ();
669 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
672 /* We don't need to duplicate thread->handle, because it is
673 * only closed when the thread object is finalized by the GC. */
674 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
676 /* We have to do this here because mono_thread_start_cb
677 * requires that root_domain_thread is set up. */
678 if (thread_static_info.offset || thread_static_info.idx > 0) {
679 /* get the current allocated size */
680 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
681 mono_alloc_static_data (&internal->static_data, offset, TRUE);
684 mono_threads_unlock ();
686 root_domain = mono_get_root_domain ();
688 g_assert (!internal->root_domain_thread);
689 if (domain != root_domain)
690 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
692 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
694 if (domain != root_domain)
695 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
697 set_current_thread_for_domain (domain, internal, thread);
699 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
707 MonoObject *start_delegate;
708 MonoObject *start_delegate_arg;
709 MonoThreadStart start_func;
710 gpointer start_func_arg;
711 gboolean force_attach;
713 MonoCoopSem registered;
716 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
719 MonoThreadStart start_func;
720 void *start_func_arg;
723 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
727 MonoInternalThread *internal;
728 MonoObject *start_delegate;
729 MonoObject *start_delegate_arg;
732 thread = start_info->thread;
733 internal = thread->internal_thread;
734 domain = mono_object_domain (start_info->thread);
736 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
738 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
739 start_info->failed = TRUE;
741 mono_coop_sem_post (&start_info->registered);
743 if (InterlockedDecrement (&start_info->ref) == 0) {
744 mono_coop_sem_destroy (&start_info->registered);
751 mono_thread_internal_set_priority (internal, internal->priority);
755 start_delegate = start_info->start_delegate;
756 start_delegate_arg = start_info->start_delegate_arg;
757 start_func = start_info->start_func;
758 start_func_arg = start_info->start_func_arg;
760 /* This MUST be called before any managed code can be
761 * executed, as it calls the callback function that (for the
762 * jit) sets the lmf marker.
765 if (mono_thread_start_cb)
766 mono_thread_start_cb (tid, stack_ptr, start_func);
768 /* On 2.0 profile (and higher), set explicitly since state might have been
770 if (internal->apartment_state == ThreadApartmentState_Unknown)
771 internal->apartment_state = ThreadApartmentState_MTA;
773 mono_thread_init_apartment_state ();
775 /* Let the thread that called Start() know we're ready */
776 mono_coop_sem_post (&start_info->registered);
778 if (InterlockedDecrement (&start_info->ref) == 0) {
779 mono_coop_sem_destroy (&start_info->registered);
783 /* start_info is not valid anymore */
787 * Call this after calling start_notify, since the profiler callback might want
788 * to lock the thread, and the lock is held by thread_start () which waits for
791 mono_profiler_thread_start (tid);
793 /* if the name was set before starting, we didn't invoke the profiler callback */
794 if (internal->name) {
795 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
796 mono_profiler_thread_name (internal->tid, tname);
797 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
801 /* start_func is set only for unmanaged start functions */
803 start_func (start_func_arg);
807 g_assert (start_delegate != NULL);
809 /* we may want to handle the exception here. See comment below on unhandled exceptions */
810 args [0] = (gpointer) start_delegate_arg;
811 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
813 if (!mono_error_ok (&error)) {
814 MonoException *ex = mono_error_convert_to_exception (&error);
816 g_assert (ex != NULL);
817 MonoClass *klass = mono_object_get_class (&ex->object);
818 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
819 !is_threadabort_exception (klass)) {
820 mono_unhandled_exception (&ex->object);
821 mono_invoke_unhandled_exception_hook (&ex->object);
822 g_assert_not_reached ();
825 mono_error_cleanup (&error);
829 /* If the thread calls ExitThread at all, this remaining code
830 * will not be executed, but the main thread will eventually
831 * call mono_thread_detach_internal() on this thread's behalf.
834 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
836 /* Do any cleanup needed for apartment state. This
837 * cannot be done in mono_thread_detach_internal since
838 * mono_thread_detach_internal could be called for a
839 * thread other than the current thread.
840 * mono_thread_cleanup_apartment_state cleans up apartment
841 * for the current thead */
842 mono_thread_cleanup_apartment_state ();
844 mono_thread_detach_internal (internal);
852 start_wrapper (gpointer data)
854 StartInfo *start_info;
855 MonoThreadInfo *info;
858 start_info = (StartInfo*) data;
859 g_assert (start_info);
861 info = mono_thread_info_attach (&res);
862 info->runtime_thread = TRUE;
864 /* Run the actual main function of the thread */
865 res = start_wrapper_internal (start_info, &res);
867 mono_thread_info_exit (res);
869 g_assert_not_reached ();
875 * Common thread creation code.
876 * LOCKING: Acquires the threads lock.
879 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
880 MonoThreadCreateFlags flags, MonoError *error)
882 StartInfo *start_info = NULL;
883 MonoNativeThreadId tid;
885 gsize stack_set_size;
888 g_assert (!start_func && !start_func_arg);
890 g_assert (!start_delegate);
892 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
893 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
894 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
896 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
897 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
898 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
902 * Join joinable threads to prevent running out of threads since the finalizer
903 * thread might be blocked/backlogged.
905 mono_threads_join_threads ();
909 mono_threads_lock ();
910 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
911 mono_threads_unlock ();
914 if (threads_starting_up == NULL) {
915 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
917 mono_g_hash_table_insert (threads_starting_up, thread, thread);
918 mono_threads_unlock ();
920 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
921 if (internal->threadpool_thread)
922 mono_thread_set_state (internal, ThreadState_Background);
924 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
926 start_info = g_new0 (StartInfo, 1);
928 start_info->thread = thread;
929 start_info->start_delegate = start_delegate;
930 start_info->start_delegate_arg = thread->start_obj;
931 start_info->start_func = start_func;
932 start_info->start_func_arg = start_func_arg;
933 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
934 start_info->failed = FALSE;
935 mono_coop_sem_init (&start_info->registered, 0);
937 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
938 stack_set_size = default_stacksize_for_thread (internal);
942 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
943 /* The thread couldn't be created, so set an exception */
944 mono_threads_lock ();
945 mono_g_hash_table_remove (threads_starting_up, thread);
946 mono_threads_unlock ();
947 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
948 /* ref is not going to be decremented in start_wrapper_internal */
949 InterlockedDecrement (&start_info->ref);
954 internal->stack_size = (int) stack_set_size;
956 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
959 * Wait for the thread to set up its TLS data etc, so
960 * theres no potential race condition if someone tries
961 * to look up the data believing the thread has
965 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
967 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));
969 ret = !start_info->failed;
972 if (InterlockedDecrement (&start_info->ref) == 0) {
973 mono_coop_sem_destroy (&start_info->registered);
980 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
982 if (mono_thread_start_cb) {
983 mono_thread_start_cb (tid, stack_start, func);
987 void mono_threads_set_default_stacksize (guint32 stacksize)
989 default_stacksize = stacksize;
992 guint32 mono_threads_get_default_stacksize (void)
994 return default_stacksize;
998 * mono_thread_create_internal:
1000 * ARG should not be a GC reference.
1003 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1006 MonoInternalThread *internal;
1011 internal = create_internal_thread_object ();
1013 thread = create_thread_object (domain, internal);
1015 LOCK_THREAD (internal);
1017 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1019 UNLOCK_THREAD (internal);
1021 return_val_if_nok (error, NULL);
1026 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1029 if (!mono_thread_create_checked (domain, func, arg, &error))
1030 mono_error_cleanup (&error);
1034 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1036 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1040 mono_thread_attach (MonoDomain *domain)
1042 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1048 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1050 MonoInternalThread *internal;
1052 MonoThreadInfo *info;
1053 MonoNativeThreadId tid;
1056 if (mono_thread_internal_current_is_attached ()) {
1057 if (domain != mono_domain_get ())
1058 mono_domain_set (domain, TRUE);
1059 /* Already attached */
1060 return mono_thread_current ();
1063 info = mono_thread_info_attach (&stack_ptr);
1066 tid=mono_native_thread_id_get ();
1068 internal = create_internal_thread_object ();
1070 thread = create_thread_object (domain, internal);
1072 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1073 /* Mono is shutting down, so just wait for the end */
1075 mono_thread_info_sleep (10000, NULL);
1078 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1080 if (mono_thread_attach_cb) {
1084 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1087 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1089 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1092 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1093 if (!mono_thread_info_current ()->tools_thread)
1094 // FIXME: Need a separate callback
1095 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1101 mono_thread_detach_internal (MonoInternalThread *thread)
1105 g_assert (thread != NULL);
1107 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1110 mono_w32mutex_abandon ();
1113 if (thread->abort_state_handle) {
1114 mono_gchandle_free (thread->abort_state_handle);
1115 thread->abort_state_handle = 0;
1118 thread->abort_exc = NULL;
1119 thread->current_appcontext = NULL;
1122 * thread->synch_cs can be NULL if this was called after
1123 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1124 * This can happen only during shutdown.
1125 * The shutting_down flag is not always set, so we can't assert on it.
1127 if (thread->synch_cs)
1128 LOCK_THREAD (thread);
1130 thread->state |= ThreadState_Stopped;
1131 thread->state &= ~ThreadState_Background;
1133 if (thread->synch_cs)
1134 UNLOCK_THREAD (thread);
1137 An interruption request has leaked to cleanup. Adjust the global counter.
1139 This can happen is the abort source thread finds the abortee (this) thread
1140 in unmanaged code. If this thread never trips back to managed code or check
1141 the local flag it will be left set and positively unbalance the global counter.
1143 Leaving the counter unbalanced will cause a performance degradation since all threads
1144 will now keep checking their local flags all the time.
1146 mono_thread_clear_interruption_requested (thread);
1148 mono_threads_lock ();
1152 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1153 /* We have to check whether the thread object for the
1154 * tid is still the same in the table because the
1155 * thread might have been destroyed and the tid reused
1156 * in the meantime, in which case the tid would be in
1157 * the table, but with another thread object.
1161 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1165 mono_threads_unlock ();
1167 /* Don't close the handle here, wait for the object finalizer
1168 * to do it. Otherwise, the following race condition applies:
1170 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1172 * 2) Some other handle is reassigned the same slot
1174 * 3) Another thread tries to join the first thread, and
1175 * blocks waiting for the reassigned handle to be signalled
1176 * (which might never happen). This is possible, because the
1177 * thread calling Join() still has a reference to the first
1181 /* if the thread is not in the hash it has been removed already */
1183 mono_domain_unset ();
1184 mono_memory_barrier ();
1186 if (mono_thread_cleanup_fn)
1187 mono_thread_cleanup_fn (thread_get_tid (thread));
1192 mono_release_type_locks (thread);
1194 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1195 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1196 mono_profiler_thread_end (thread->tid);
1198 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1201 * This will signal async signal handlers that the thread has exited.
1202 * The profiler callback needs this to be set, so it cannot be done earlier.
1204 mono_domain_unset ();
1205 mono_memory_barrier ();
1207 if (thread == mono_thread_internal_current ())
1208 mono_thread_pop_appdomain_ref ();
1210 mono_free_static_data (thread->static_data);
1211 thread->static_data = NULL;
1212 ref_stack_destroy (thread->appdomain_refs);
1213 thread->appdomain_refs = NULL;
1215 g_assert (thread->suspended);
1216 mono_os_event_destroy (thread->suspended);
1217 g_free (thread->suspended);
1218 thread->suspended = NULL;
1220 if (mono_thread_cleanup_fn)
1221 mono_thread_cleanup_fn (thread_get_tid (thread));
1223 mono_memory_barrier ();
1225 if (mono_gc_is_moving ()) {
1226 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1227 thread->thread_pinning_ref = NULL;
1231 SET_CURRENT_OBJECT (NULL);
1232 mono_domain_unset ();
1234 /* Don't need to close the handle to this thread, even though we took a
1235 * reference in mono_thread_attach (), because the GC will do it
1236 * when the Thread object is finalised.
1241 mono_thread_detach (MonoThread *thread)
1244 mono_thread_detach_internal (thread->internal_thread);
1248 * mono_thread_detach_if_exiting:
1250 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1251 * This should be used at the end of embedding code which calls into managed code, and which
1252 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1255 mono_thread_detach_if_exiting (void)
1257 if (mono_thread_info_is_exiting ()) {
1258 MonoInternalThread *thread;
1260 thread = mono_thread_internal_current ();
1262 mono_thread_detach_internal (thread);
1263 mono_thread_info_detach ();
1271 mono_thread_internal_current_is_attached (void)
1273 MonoInternalThread *internal;
1275 internal = GET_CURRENT_OBJECT ();
1283 mono_thread_exit (void)
1285 MonoInternalThread *thread = mono_thread_internal_current ();
1287 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1289 mono_thread_detach_internal (thread);
1291 /* we could add a callback here for embedders to use. */
1292 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1293 exit (mono_environment_exitcode_get ());
1295 mono_thread_info_exit (0);
1299 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1301 MonoInternalThread *internal;
1303 internal = create_internal_thread_object ();
1305 internal->state = ThreadState_Unstarted;
1307 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1311 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1313 return mono_thread_current ();
1317 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1321 MonoInternalThread *internal;
1324 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1326 if (!this_obj->internal_thread)
1327 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1328 internal = this_obj->internal_thread;
1330 LOCK_THREAD (internal);
1332 if ((internal->state & ThreadState_Unstarted) == 0) {
1333 UNLOCK_THREAD (internal);
1334 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1338 if ((internal->state & ThreadState_Aborted) != 0) {
1339 UNLOCK_THREAD (internal);
1343 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1345 mono_error_cleanup (&error);
1346 UNLOCK_THREAD (internal);
1350 internal->state &= ~ThreadState_Unstarted;
1352 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1354 UNLOCK_THREAD (internal);
1355 return internal->handle;
1359 * This is called from the finalizer of the internal thread object.
1362 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1364 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1367 * Since threads keep a reference to their thread object while running, by
1368 * the time this function is called, the thread has already exited/detached,
1369 * i.e. mono_thread_detach_internal () has ran. The exception is during
1370 * shutdown, when mono_thread_detach_internal () can be called after this.
1372 if (this_obj->handle) {
1373 mono_threads_close_thread_handle (this_obj->handle);
1374 this_obj->handle = NULL;
1378 CloseHandle (this_obj->native_handle);
1381 if (this_obj->synch_cs) {
1382 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1383 this_obj->synch_cs = NULL;
1384 mono_coop_mutex_destroy (synch_cs);
1388 if (this_obj->name) {
1389 void *name = this_obj->name;
1390 this_obj->name = NULL;
1396 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1399 MonoInternalThread *thread = mono_thread_internal_current ();
1401 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1403 if (mono_thread_current_check_pending_interrupt ())
1407 gboolean alerted = FALSE;
1409 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1411 res = mono_thread_info_sleep (ms, &alerted);
1413 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1416 MonoException* exc = mono_thread_execute_interruption ();
1418 mono_raise_exception (exc);
1420 // FIXME: !MONO_INFINITE_WAIT
1421 if (ms != MONO_INFINITE_WAIT)
1430 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1435 ves_icall_System_Threading_Thread_GetDomainID (void)
1437 return mono_domain_get()->domain_id;
1441 ves_icall_System_Threading_Thread_Yield (void)
1443 return mono_thread_info_yield ();
1447 * mono_thread_get_name:
1449 * Return the name of the thread. NAME_LEN is set to the length of the name.
1450 * Return NULL if the thread has no name. The returned memory is owned by the
1454 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1458 LOCK_THREAD (this_obj);
1460 if (!this_obj->name) {
1464 *name_len = this_obj->name_len;
1465 res = g_new (gunichar2, this_obj->name_len);
1466 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1469 UNLOCK_THREAD (this_obj);
1475 * mono_thread_get_name_utf8:
1477 * Return the name of the thread in UTF-8.
1478 * Return NULL if the thread has no name.
1479 * The returned memory is owned by the caller.
1482 mono_thread_get_name_utf8 (MonoThread *thread)
1487 MonoInternalThread *internal = thread->internal_thread;
1488 if (internal == NULL)
1491 LOCK_THREAD (internal);
1493 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1495 UNLOCK_THREAD (internal);
1501 * mono_thread_get_managed_id:
1503 * Return the Thread.ManagedThreadId value of `thread`.
1504 * Returns -1 if `thread` is NULL.
1507 mono_thread_get_managed_id (MonoThread *thread)
1512 MonoInternalThread *internal = thread->internal_thread;
1513 if (internal == NULL)
1516 int32_t id = internal->managed_id;
1522 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1527 error_init (&error);
1529 LOCK_THREAD (this_obj);
1531 if (!this_obj->name)
1534 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1536 UNLOCK_THREAD (this_obj);
1538 if (mono_error_set_pending_exception (&error))
1545 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1547 LOCK_THREAD (this_obj);
1552 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1553 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1554 UNLOCK_THREAD (this_obj);
1556 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1559 if (this_obj->name) {
1560 g_free (this_obj->name);
1561 this_obj->name_len = 0;
1564 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1565 this_obj->name_len = mono_string_length (name);
1568 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1571 this_obj->name = NULL;
1574 UNLOCK_THREAD (this_obj);
1576 if (this_obj->name && this_obj->tid) {
1577 char *tname = mono_string_to_utf8_checked (name, error);
1578 return_if_nok (error);
1579 mono_profiler_thread_name (this_obj->tid, tname);
1580 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1586 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1589 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1590 mono_error_set_pending_exception (&error);
1594 * ves_icall_System_Threading_Thread_GetPriority_internal:
1595 * @param this_obj: The MonoInternalThread on which to operate.
1597 * Gets the priority of the given thread.
1598 * @return: The priority of the given thread.
1601 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1604 MonoInternalThread *internal = this_obj->internal_thread;
1606 LOCK_THREAD (internal);
1607 priority = internal->priority;
1608 UNLOCK_THREAD (internal);
1614 * ves_icall_System_Threading_Thread_SetPriority_internal:
1615 * @param this_obj: The MonoInternalThread on which to operate.
1616 * @param priority: The priority to set.
1618 * Sets the priority of the given thread.
1621 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1623 MonoInternalThread *internal = this_obj->internal_thread;
1625 LOCK_THREAD (internal);
1626 internal->priority = priority;
1627 if (internal->thread_info != NULL)
1628 mono_thread_internal_set_priority (internal, priority);
1629 UNLOCK_THREAD (internal);
1632 /* If the array is already in the requested domain, we just return it,
1633 otherwise we return a copy in that domain. */
1635 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1643 if (mono_object_domain (arr) == domain)
1646 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1647 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1652 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1655 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1656 mono_error_set_pending_exception (&error);
1661 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1664 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1665 mono_error_set_pending_exception (&error);
1670 mono_thread_current (void)
1672 MonoDomain *domain = mono_domain_get ();
1673 MonoInternalThread *internal = mono_thread_internal_current ();
1674 MonoThread **current_thread_ptr;
1676 g_assert (internal);
1677 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1679 if (!*current_thread_ptr) {
1680 g_assert (domain != mono_get_root_domain ());
1681 *current_thread_ptr = create_thread_object (domain, internal);
1683 return *current_thread_ptr;
1686 /* Return the thread object belonging to INTERNAL in the current domain */
1688 mono_thread_current_for_thread (MonoInternalThread *internal)
1690 MonoDomain *domain = mono_domain_get ();
1691 MonoThread **current_thread_ptr;
1693 g_assert (internal);
1694 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1696 if (!*current_thread_ptr) {
1697 g_assert (domain != mono_get_root_domain ());
1698 *current_thread_ptr = create_thread_object (domain, internal);
1700 return *current_thread_ptr;
1704 mono_thread_internal_current (void)
1706 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1707 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1711 static MonoThreadInfoWaitRet
1712 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1715 MonoThreadInfoWaitRet ret;
1722 start = (ms == -1) ? 0 : mono_msec_ticks ();
1725 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1728 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1731 exc = mono_thread_execute_interruption ();
1733 mono_error_set_exception_instance (error, exc);
1740 /* Re-calculate ms according to the time passed */
1741 diff_ms = (gint32)(mono_msec_ticks () - start);
1742 if (diff_ms >= ms) {
1743 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1746 wait = ms - diff_ms;
1753 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1755 MonoInternalThread *thread = this_obj->internal_thread;
1756 MonoThreadHandle *handle = thread->handle;
1757 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1761 if (mono_thread_current_check_pending_interrupt ())
1764 LOCK_THREAD (thread);
1766 if ((thread->state & ThreadState_Unstarted) != 0) {
1767 UNLOCK_THREAD (thread);
1769 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1773 UNLOCK_THREAD (thread);
1776 ms=MONO_INFINITE_WAIT;
1778 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1780 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1782 ret=mono_join_uninterrupted (handle, ms, &error);
1784 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1786 mono_error_set_pending_exception (&error);
1788 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1789 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1794 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1799 #define MANAGED_WAIT_FAILED 0x7fffffff
1802 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1804 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1805 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1806 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1807 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1808 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1809 return WAIT_IO_COMPLETION;
1810 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1811 return WAIT_TIMEOUT;
1812 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1813 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1814 return MANAGED_WAIT_FAILED;
1816 g_error ("%s: unknown val value %d", __func__, val);
1820 static MonoW32HandleWaitRet
1821 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1824 MonoW32HandleWaitRet ret;
1831 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1835 if (numhandles != 1)
1836 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1838 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1840 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1841 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1842 #endif /* HOST_WIN32 */
1845 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1848 exc = mono_thread_execute_interruption ();
1850 mono_error_set_exception_instance (error, exc);
1857 /* Re-calculate ms according to the time passed */
1858 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1859 if (diff_ms >= ms) {
1860 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1863 wait = ms - diff_ms;
1869 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1874 MonoW32HandleWaitRet ret;
1876 MonoObject *waitHandle;
1877 MonoInternalThread *thread = mono_thread_internal_current ();
1879 /* Do this WaitSleepJoin check before creating objects */
1880 if (mono_thread_current_check_pending_interrupt ())
1881 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1883 /* We fail in managed if the array has more than 64 elements */
1884 numhandles = (guint32)mono_array_length(mono_handles);
1885 handles = g_new0(HANDLE, numhandles);
1887 for(i = 0; i < numhandles; i++) {
1888 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1889 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1893 ms=MONO_INFINITE_WAIT;
1896 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1898 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1900 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1904 mono_error_set_pending_exception (&error);
1906 return map_native_wait_result_to_managed (ret, numhandles);
1909 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1912 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1913 uintptr_t numhandles;
1914 MonoW32HandleWaitRet ret;
1916 MonoObject *waitHandle;
1917 MonoInternalThread *thread = mono_thread_internal_current ();
1919 /* Do this WaitSleepJoin check before creating objects */
1920 if (mono_thread_current_check_pending_interrupt ())
1921 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1923 numhandles = mono_array_length(mono_handles);
1924 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1925 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1927 for(i = 0; i < numhandles; i++) {
1928 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1929 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1933 ms=MONO_INFINITE_WAIT;
1936 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1938 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1940 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1942 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1944 mono_error_set_pending_exception (&error);
1946 return map_native_wait_result_to_managed (ret, numhandles);
1949 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1952 MonoW32HandleWaitRet ret;
1953 MonoInternalThread *thread = mono_thread_internal_current ();
1955 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1958 ms=MONO_INFINITE_WAIT;
1961 if (mono_thread_current_check_pending_interrupt ())
1962 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1964 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1966 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1968 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1970 mono_error_set_pending_exception (&error);
1971 return map_native_wait_result_to_managed (ret, 1);
1975 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1977 MonoW32HandleWaitRet ret;
1978 MonoInternalThread *thread = mono_thread_internal_current ();
1981 ms = MONO_INFINITE_WAIT;
1983 if (mono_thread_current_check_pending_interrupt ())
1984 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1986 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1990 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1992 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1996 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1998 return map_native_wait_result_to_managed (ret, 1);
2001 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2003 return InterlockedIncrement (location);
2006 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2008 #if SIZEOF_VOID_P == 4
2009 if (G_UNLIKELY ((size_t)location & 0x7)) {
2011 mono_interlocked_lock ();
2014 mono_interlocked_unlock ();
2018 return InterlockedIncrement64 (location);
2021 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2023 return InterlockedDecrement(location);
2026 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2028 #if SIZEOF_VOID_P == 4
2029 if (G_UNLIKELY ((size_t)location & 0x7)) {
2031 mono_interlocked_lock ();
2034 mono_interlocked_unlock ();
2038 return InterlockedDecrement64 (location);
2041 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2043 return InterlockedExchange(location, value);
2046 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2049 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2050 mono_gc_wbarrier_generic_nostore (location);
2054 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2056 return InterlockedExchangePointer(location, value);
2059 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2061 IntFloatUnion val, ret;
2064 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2070 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2072 #if SIZEOF_VOID_P == 4
2073 if (G_UNLIKELY ((size_t)location & 0x7)) {
2075 mono_interlocked_lock ();
2078 mono_interlocked_unlock ();
2082 return InterlockedExchange64 (location, value);
2086 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2088 LongDoubleUnion val, ret;
2091 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2096 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2098 return InterlockedCompareExchange(location, value, comparand);
2101 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2103 gint32 r = InterlockedCompareExchange(location, value, comparand);
2104 *success = r == comparand;
2108 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2111 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2112 mono_gc_wbarrier_generic_nostore (location);
2116 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2118 return InterlockedCompareExchangePointer(location, value, comparand);
2121 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2123 IntFloatUnion val, ret, cmp;
2126 cmp.fval = comparand;
2127 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2133 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2135 #if SIZEOF_VOID_P == 8
2136 LongDoubleUnion val, comp, ret;
2139 comp.fval = comparand;
2140 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2146 mono_interlocked_lock ();
2148 if (old == comparand)
2150 mono_interlocked_unlock ();
2157 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2159 #if SIZEOF_VOID_P == 4
2160 if (G_UNLIKELY ((size_t)location & 0x7)) {
2162 mono_interlocked_lock ();
2164 if (old == comparand)
2166 mono_interlocked_unlock ();
2170 return InterlockedCompareExchange64 (location, value, comparand);
2174 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2177 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2178 mono_gc_wbarrier_generic_nostore (location);
2183 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2186 MONO_CHECK_NULL (location, NULL);
2187 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2188 mono_gc_wbarrier_generic_nostore (location);
2193 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2195 return InterlockedAdd (location, value);
2199 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2201 #if SIZEOF_VOID_P == 4
2202 if (G_UNLIKELY ((size_t)location & 0x7)) {
2204 mono_interlocked_lock ();
2207 mono_interlocked_unlock ();
2211 return InterlockedAdd64 (location, value);
2215 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2217 #if SIZEOF_VOID_P == 4
2218 if (G_UNLIKELY ((size_t)location & 0x7)) {
2220 mono_interlocked_lock ();
2222 mono_interlocked_unlock ();
2226 return InterlockedRead64 (location);
2230 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2232 mono_memory_barrier ();
2236 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2238 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2240 if (state & ThreadState_Background) {
2241 /* If the thread changes the background mode, the main thread has to
2242 * be notified, since it has to rebuild the list of threads to
2245 mono_os_event_set (&background_change_event);
2250 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2252 mono_thread_set_state (this_obj, (MonoThreadState)state);
2254 if (state & ThreadState_Background) {
2255 /* If the thread changes the background mode, the main thread has to
2256 * be notified, since it has to rebuild the list of threads to
2259 mono_os_event_set (&background_change_event);
2264 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2268 LOCK_THREAD (this_obj);
2270 state = this_obj->state;
2272 UNLOCK_THREAD (this_obj);
2277 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2279 MonoInternalThread *current;
2281 MonoInternalThread *thread = this_obj->internal_thread;
2283 LOCK_THREAD (thread);
2285 current = mono_thread_internal_current ();
2287 thread->thread_interrupt_requested = TRUE;
2288 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2290 UNLOCK_THREAD (thread);
2293 async_abort_internal (thread, FALSE);
2298 * mono_thread_current_check_pending_interrupt:
2300 * Checks if there's a interruption request and set the pending exception if so.
2302 * @returns true if a pending exception was set
2305 mono_thread_current_check_pending_interrupt (void)
2307 MonoInternalThread *thread = mono_thread_internal_current ();
2308 gboolean throw_ = FALSE;
2310 LOCK_THREAD (thread);
2312 if (thread->thread_interrupt_requested) {
2314 thread->thread_interrupt_requested = FALSE;
2317 UNLOCK_THREAD (thread);
2320 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2325 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2327 LOCK_THREAD (thread);
2329 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2331 UNLOCK_THREAD (thread);
2335 if ((thread->state & ThreadState_Unstarted) != 0) {
2336 thread->state |= ThreadState_Aborted;
2337 UNLOCK_THREAD (thread);
2341 thread->state |= ThreadState_AbortRequested;
2342 if (thread->abort_state_handle)
2343 mono_gchandle_free (thread->abort_state_handle);
2345 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2346 g_assert (thread->abort_state_handle);
2348 thread->abort_state_handle = 0;
2350 thread->abort_exc = NULL;
2352 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));
2354 /* During shutdown, we can't wait for other threads */
2356 /* Make sure the thread is awake */
2357 mono_thread_resume (thread);
2359 UNLOCK_THREAD (thread);
2364 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2366 if (!request_thread_abort (thread, state))
2369 if (thread == mono_thread_internal_current ()) {
2371 self_abort_internal (&error);
2372 mono_error_set_pending_exception (&error);
2374 async_abort_internal (thread, TRUE);
2379 * mono_thread_internal_abort:
2381 * Request thread @thread to be aborted.
2383 * @thread MUST NOT be the current thread.
2386 mono_thread_internal_abort (MonoInternalThread *thread)
2388 g_assert (thread != mono_thread_internal_current ());
2390 if (!request_thread_abort (thread, NULL))
2392 async_abort_internal (thread, TRUE);
2396 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2398 MonoInternalThread *thread = mono_thread_internal_current ();
2399 gboolean was_aborting;
2401 LOCK_THREAD (thread);
2402 was_aborting = thread->state & ThreadState_AbortRequested;
2403 thread->state &= ~ThreadState_AbortRequested;
2404 UNLOCK_THREAD (thread);
2406 if (!was_aborting) {
2407 const char *msg = "Unable to reset abort because no abort was requested";
2408 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2412 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2413 thread->abort_exc = NULL;
2414 if (thread->abort_state_handle) {
2415 mono_gchandle_free (thread->abort_state_handle);
2416 /* This is actually not necessary - the handle
2417 only counts if the exception is set */
2418 thread->abort_state_handle = 0;
2423 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2425 LOCK_THREAD (thread);
2427 thread->state &= ~ThreadState_AbortRequested;
2429 if (thread->abort_exc) {
2430 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2431 thread->abort_exc = NULL;
2432 if (thread->abort_state_handle) {
2433 mono_gchandle_free (thread->abort_state_handle);
2434 /* This is actually not necessary - the handle
2435 only counts if the exception is set */
2436 thread->abort_state_handle = 0;
2440 UNLOCK_THREAD (thread);
2444 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2447 MonoInternalThread *thread = this_obj->internal_thread;
2448 MonoObject *state, *deserialized = NULL;
2451 if (!thread->abort_state_handle)
2454 state = mono_gchandle_get_target (thread->abort_state_handle);
2457 domain = mono_domain_get ();
2458 if (mono_object_domain (state) == domain)
2461 deserialized = mono_object_xdomain_representation (state, domain, &error);
2463 if (!deserialized) {
2464 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2465 if (!is_ok (&error)) {
2466 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2467 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2469 mono_set_pending_exception (invalid_op_exc);
2473 return deserialized;
2477 mono_thread_suspend (MonoInternalThread *thread)
2479 LOCK_THREAD (thread);
2481 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2483 UNLOCK_THREAD (thread);
2487 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2489 UNLOCK_THREAD (thread);
2493 thread->state |= ThreadState_SuspendRequested;
2494 mono_os_event_reset (thread->suspended);
2496 if (thread == mono_thread_internal_current ()) {
2497 /* calls UNLOCK_THREAD (thread) */
2498 self_suspend_internal ();
2500 /* calls UNLOCK_THREAD (thread) */
2501 async_suspend_internal (thread, FALSE);
2508 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2510 if (!mono_thread_suspend (this_obj->internal_thread)) {
2511 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2516 /* LOCKING: LOCK_THREAD(thread) must be held */
2518 mono_thread_resume (MonoInternalThread *thread)
2520 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2521 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2522 thread->state &= ~ThreadState_SuspendRequested;
2523 mono_os_event_set (thread->suspended);
2527 if ((thread->state & ThreadState_Suspended) == 0 ||
2528 (thread->state & ThreadState_Unstarted) != 0 ||
2529 (thread->state & ThreadState_Aborted) != 0 ||
2530 (thread->state & ThreadState_Stopped) != 0)
2532 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2536 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2538 mono_os_event_set (thread->suspended);
2540 if (!thread->self_suspended) {
2541 UNLOCK_THREAD (thread);
2543 /* Awake the thread */
2544 if (!mono_thread_info_resume (thread_get_tid (thread)))
2547 LOCK_THREAD (thread);
2550 thread->state &= ~ThreadState_Suspended;
2556 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2558 if (!thread->internal_thread) {
2559 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2561 LOCK_THREAD (thread->internal_thread);
2562 if (!mono_thread_resume (thread->internal_thread))
2563 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2564 UNLOCK_THREAD (thread->internal_thread);
2569 mono_threads_is_critical_method (MonoMethod *method)
2571 switch (method->wrapper_type) {
2572 case MONO_WRAPPER_RUNTIME_INVOKE:
2573 case MONO_WRAPPER_XDOMAIN_INVOKE:
2574 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2581 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2586 if (mono_threads_is_critical_method (m)) {
2587 *((gboolean*)data) = TRUE;
2594 is_running_protected_wrapper (void)
2596 gboolean found = FALSE;
2597 mono_stack_walk (find_wrapper, &found);
2602 mono_thread_stop (MonoThread *thread)
2604 MonoInternalThread *internal = thread->internal_thread;
2606 if (!request_thread_abort (internal, NULL))
2609 if (internal == mono_thread_internal_current ()) {
2611 self_abort_internal (&error);
2613 This function is part of the embeding API and has no way to return the exception
2614 to be thrown. So what we do is keep the old behavior and raise the exception.
2616 mono_error_raise_exception (&error); /* OK to throw, see note */
2618 async_abort_internal (internal, TRUE);
2623 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2625 gint8 tmp = *(volatile gint8 *)ptr;
2626 mono_memory_barrier ();
2631 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2633 gint16 tmp = *(volatile gint16 *)ptr;
2634 mono_memory_barrier ();
2639 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2641 gint32 tmp = *(volatile gint32 *)ptr;
2642 mono_memory_barrier ();
2647 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2649 gint64 tmp = *(volatile gint64 *)ptr;
2650 mono_memory_barrier ();
2655 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2657 volatile void *tmp = *(volatile void **)ptr;
2658 mono_memory_barrier ();
2659 return (void *) tmp;
2663 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2665 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2666 mono_memory_barrier ();
2667 return (MonoObject *) tmp;
2671 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2673 double tmp = *(volatile double *)ptr;
2674 mono_memory_barrier ();
2679 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2681 float tmp = *(volatile float *)ptr;
2682 mono_memory_barrier ();
2687 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2689 return InterlockedRead8 ((volatile gint8 *)ptr);
2693 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2695 return InterlockedRead16 ((volatile gint16 *)ptr);
2699 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2701 return InterlockedRead ((volatile gint32 *)ptr);
2705 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2707 #if SIZEOF_VOID_P == 4
2708 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2710 mono_interlocked_lock ();
2711 val = *(gint64*)ptr;
2712 mono_interlocked_unlock ();
2716 return InterlockedRead64 ((volatile gint64 *)ptr);
2720 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2722 return InterlockedReadPointer ((volatile gpointer *)ptr);
2726 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2730 #if SIZEOF_VOID_P == 4
2731 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2733 mono_interlocked_lock ();
2734 val = *(double*)ptr;
2735 mono_interlocked_unlock ();
2740 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2746 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2750 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2756 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2758 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2762 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2764 mono_memory_barrier ();
2765 *(volatile gint8 *)ptr = value;
2769 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2771 mono_memory_barrier ();
2772 *(volatile gint16 *)ptr = value;
2776 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2778 mono_memory_barrier ();
2779 *(volatile gint32 *)ptr = value;
2783 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2785 mono_memory_barrier ();
2786 *(volatile gint64 *)ptr = value;
2790 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2792 mono_memory_barrier ();
2793 *(volatile void **)ptr = value;
2797 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2799 mono_memory_barrier ();
2800 mono_gc_wbarrier_generic_store (ptr, value);
2804 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2806 mono_memory_barrier ();
2807 *(volatile double *)ptr = value;
2811 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2813 mono_memory_barrier ();
2814 *(volatile float *)ptr = value;
2818 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2820 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2824 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2826 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2830 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2832 InterlockedWrite ((volatile gint32 *)ptr, value);
2836 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2838 #if SIZEOF_VOID_P == 4
2839 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2840 mono_interlocked_lock ();
2841 *(gint64*)ptr = value;
2842 mono_interlocked_unlock ();
2847 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2851 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2853 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2857 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2861 #if SIZEOF_VOID_P == 4
2862 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2863 mono_interlocked_lock ();
2864 *(double*)ptr = value;
2865 mono_interlocked_unlock ();
2872 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2876 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2882 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2886 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2888 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2892 free_context (void *user_data)
2894 ContextStaticData *data = user_data;
2896 mono_threads_lock ();
2899 * There is no guarantee that, by the point this reference queue callback
2900 * has been invoked, the GC handle associated with the object will fail to
2901 * resolve as one might expect. So if we don't free and remove the GC
2902 * handle here, free_context_static_data_helper () could end up resolving
2903 * a GC handle to an actually-dead context which would contain a pointer
2904 * to an already-freed static data segment, resulting in a crash when
2907 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2909 mono_threads_unlock ();
2911 mono_gchandle_free (data->gc_handle);
2912 mono_free_static_data (data->static_data);
2917 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2919 mono_threads_lock ();
2921 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2924 contexts = g_hash_table_new (NULL, NULL);
2927 context_queue = mono_gc_reference_queue_new (free_context);
2929 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2930 g_hash_table_insert (contexts, gch, gch);
2933 * We use this intermediate structure to contain a duplicate pointer to
2934 * the static data because we can't rely on being able to resolve the GC
2935 * handle in the reference queue callback.
2937 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2938 data->gc_handle = GPOINTER_TO_UINT (gch);
2941 context_adjust_static_data (ctx);
2942 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2944 mono_threads_unlock ();
2946 mono_profiler_context_loaded (ctx);
2950 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2953 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2954 * cleanup in exceptional circumstances, we don't actually do any
2955 * cleanup work here. We instead do this via a reference queue.
2958 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2960 mono_profiler_context_unloaded (ctx);
2963 void mono_thread_init (MonoThreadStartCB start_cb,
2964 MonoThreadAttachCB attach_cb)
2966 mono_coop_mutex_init_recursive (&threads_mutex);
2968 mono_os_mutex_init_recursive(&interlocked_mutex);
2969 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2971 mono_os_event_init (&background_change_event, FALSE);
2973 mono_init_static_data_info (&thread_static_info);
2974 mono_init_static_data_info (&context_static_info);
2976 mono_thread_start_cb = start_cb;
2977 mono_thread_attach_cb = attach_cb;
2980 void mono_thread_cleanup (void)
2982 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
2983 /* The main thread must abandon any held mutexes (particularly
2984 * important for named mutexes as they are shared across
2985 * processes, see bug 74680.) This will happen when the
2986 * thread exits, but if it's not running in a subthread it
2987 * won't exit in time.
2989 mono_w32mutex_abandon ();
2993 /* This stuff needs more testing, it seems one of these
2994 * critical sections can be locked when mono_thread_cleanup is
2997 mono_coop_mutex_destroy (&threads_mutex);
2998 mono_os_mutex_destroy (&interlocked_mutex);
2999 mono_os_mutex_destroy (&delayed_free_table_mutex);
3000 mono_os_mutex_destroy (&small_id_mutex);
3001 mono_os_event_destroy (&background_change_event);
3006 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3008 mono_thread_cleanup_fn = func;
3012 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3014 thread->internal_thread->manage_callback = func;
3018 static void print_tids (gpointer key, gpointer value, gpointer user)
3020 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3021 * sizeof(uint) and a cast to uint would overflow
3023 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3024 * print this as a pointer.
3026 g_message ("Waiting for: %p", key);
3031 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3032 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3037 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3040 MonoThreadInfoWaitRet ret;
3042 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3044 /* Add the thread state change event, so it wakes
3045 * up if a thread changes to background mode. */
3048 if (check_state_change)
3049 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3051 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3054 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3055 /* See the comment in build_wait_tids() */
3056 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3060 for( i = 0; i < wait->num; i++)
3061 mono_threads_close_thread_handle (wait->handles [i]);
3063 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3066 if (ret < wait->num) {
3067 MonoInternalThread *internal;
3069 internal = wait->threads [ret];
3071 mono_threads_lock ();
3072 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3073 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3074 mono_threads_unlock ();
3078 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3080 struct wait_data *wait=(struct wait_data *)user;
3082 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3083 MonoInternalThread *thread=(MonoInternalThread *)value;
3085 /* Ignore background threads, we abort them later */
3086 /* Do not lock here since it is not needed and the caller holds threads_lock */
3087 if (thread->state & ThreadState_Background) {
3088 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3089 return; /* just leave, ignore */
3092 if (mono_gc_is_finalizer_internal_thread (thread)) {
3093 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3097 if (thread == mono_thread_internal_current ()) {
3098 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3102 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3103 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3107 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3108 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3112 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3113 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3114 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3115 wait->threads[wait->num]=thread;
3118 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3120 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3125 /* Just ignore the rest, we can't do anything with
3132 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3134 struct wait_data *wait=(struct wait_data *)user;
3135 MonoNativeThreadId self = mono_native_thread_id_get ();
3136 MonoInternalThread *thread = (MonoInternalThread *)value;
3138 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3141 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3143 if (mono_gc_is_finalizer_internal_thread (thread))
3146 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3147 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3148 wait->threads[wait->num] = thread;
3151 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3152 mono_thread_internal_abort (thread);
3159 * mono_threads_set_shutting_down:
3161 * Is called by a thread that wants to shut down Mono. If the runtime is already
3162 * shutting down, the calling thread is suspended/stopped, and this function never
3166 mono_threads_set_shutting_down (void)
3168 MonoInternalThread *current_thread = mono_thread_internal_current ();
3170 mono_threads_lock ();
3172 if (shutting_down) {
3173 mono_threads_unlock ();
3175 /* Make sure we're properly suspended/stopped */
3177 LOCK_THREAD (current_thread);
3179 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3180 UNLOCK_THREAD (current_thread);
3181 mono_thread_execute_interruption ();
3183 UNLOCK_THREAD (current_thread);
3186 /*since we're killing the thread, detach it.*/
3187 mono_thread_detach_internal (current_thread);
3189 /* Wake up other threads potentially waiting for us */
3190 mono_thread_info_exit (0);
3192 shutting_down = TRUE;
3194 /* Not really a background state change, but this will
3195 * interrupt the main thread if it is waiting for all
3196 * the other threads.
3198 mono_os_event_set (&background_change_event);
3200 mono_threads_unlock ();
3204 void mono_thread_manage (void)
3206 struct wait_data wait_data;
3207 struct wait_data *wait = &wait_data;
3209 memset (wait, 0, sizeof (struct wait_data));
3210 /* join each thread that's still running */
3211 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3213 mono_threads_lock ();
3215 THREAD_DEBUG (g_message("%s: No threads", __func__));
3216 mono_threads_unlock ();
3219 mono_threads_unlock ();
3222 mono_threads_lock ();
3223 if (shutting_down) {
3224 /* somebody else is shutting down */
3225 mono_threads_unlock ();
3228 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3229 mono_g_hash_table_foreach (threads, print_tids, NULL));
3231 mono_os_event_reset (&background_change_event);
3233 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3234 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3235 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3236 mono_threads_unlock ();
3238 /* Something to wait for */
3239 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3240 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3241 } while(wait->num>0);
3243 /* Mono is shutting down, so just wait for the end */
3244 if (!mono_runtime_try_shutdown ()) {
3245 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3246 mono_thread_suspend (mono_thread_internal_current ());
3247 mono_thread_execute_interruption ();
3251 * Remove everything but the finalizer thread and self.
3252 * Also abort all the background threads
3255 mono_threads_lock ();
3258 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3259 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3260 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3262 mono_threads_unlock ();
3264 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3265 if (wait->num > 0) {
3266 /* Something to wait for */
3267 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3269 } while (wait->num > 0);
3272 * give the subthreads a chance to really quit (this is mainly needed
3273 * to get correct user and system times from getrusage/wait/time(1)).
3274 * This could be removed if we avoid pthread_detach() and use pthread_join().
3276 mono_thread_info_yield ();
3280 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3282 MonoInternalThread *thread = (MonoInternalThread*)value;
3283 struct wait_data *wait = (struct wait_data*)user_data;
3286 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3288 * This needs no locking.
3290 if ((thread->state & ThreadState_Suspended) != 0 ||
3291 (thread->state & ThreadState_Stopped) != 0)
3294 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3295 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3296 wait->threads [wait->num] = thread;
3302 * mono_thread_suspend_all_other_threads:
3304 * Suspend all managed threads except the finalizer thread and this thread. It is
3305 * not possible to resume them later.
3307 void mono_thread_suspend_all_other_threads (void)
3309 struct wait_data wait_data;
3310 struct wait_data *wait = &wait_data;
3312 MonoNativeThreadId self = mono_native_thread_id_get ();
3313 guint32 eventidx = 0;
3314 gboolean starting, finished;
3316 memset (wait, 0, sizeof (struct wait_data));
3318 * The other threads could be in an arbitrary state at this point, i.e.
3319 * they could be starting up, shutting down etc. This means that there could be
3320 * threads which are not even in the threads hash table yet.
3324 * First we set a barrier which will be checked by all threads before they
3325 * are added to the threads hash table, and they will exit if the flag is set.
3326 * This ensures that no threads could be added to the hash later.
3327 * We will use shutting_down as the barrier for now.
3329 g_assert (shutting_down);
3332 * We make multiple calls to WaitForMultipleObjects since:
3333 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3334 * - some threads could exit without becoming suspended
3339 * Make a copy of the hashtable since we can't do anything with
3340 * threads while threads_mutex is held.
3343 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3344 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3345 mono_threads_lock ();
3346 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3347 mono_threads_unlock ();
3350 /* Get the suspended events that we'll be waiting for */
3351 for (i = 0; i < wait->num; ++i) {
3352 MonoInternalThread *thread = wait->threads [i];
3354 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3355 || mono_gc_is_finalizer_internal_thread (thread)
3356 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3358 mono_threads_close_thread_handle (wait->handles [i]);
3359 wait->threads [i] = NULL;
3363 LOCK_THREAD (thread);
3365 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3366 UNLOCK_THREAD (thread);
3367 mono_threads_close_thread_handle (wait->handles [i]);
3368 wait->threads [i] = NULL;
3374 /* Convert abort requests into suspend requests */
3375 if ((thread->state & ThreadState_AbortRequested) != 0)
3376 thread->state &= ~ThreadState_AbortRequested;
3378 thread->state |= ThreadState_SuspendRequested;
3379 mono_os_event_reset (thread->suspended);
3381 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3382 async_suspend_internal (thread, TRUE);
3384 mono_threads_close_thread_handle (wait->handles [i]);
3385 wait->threads [i] = NULL;
3387 if (eventidx <= 0) {
3389 * If there are threads which are starting up, we wait until they
3390 * are suspended when they try to register in the threads hash.
3391 * This is guaranteed to finish, since the threads which can create new
3392 * threads get suspended after a while.
3393 * FIXME: The finalizer thread can still create new threads.
3395 mono_threads_lock ();
3396 if (threads_starting_up)
3397 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3400 mono_threads_unlock ();
3402 mono_thread_info_sleep (100, NULL);
3410 MonoInternalThread *thread;
3411 MonoStackFrameInfo *frames;
3412 int nframes, max_frames;
3413 int nthreads, max_threads;
3414 MonoInternalThread **threads;
3415 } ThreadDumpUserData;
3417 static gboolean thread_dump_requested;
3419 /* This needs to be async safe */
3421 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3423 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3425 if (ud->nframes < ud->max_frames) {
3426 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3433 /* This needs to be async safe */
3434 static SuspendThreadResult
3435 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3437 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3438 MonoInternalThread *thread = user_data->thread;
3441 /* This no longer works with remote unwinding */
3442 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3443 mono_thread_internal_describe (thread, text);
3444 g_string_append (text, "\n");
3447 if (thread == mono_thread_internal_current ())
3448 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3450 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3452 return MonoResumeThread;
3456 int nthreads, max_threads;
3457 MonoInternalThread **threads;
3458 } CollectThreadsUserData;
3461 collect_thread (gpointer key, gpointer value, gpointer user)
3463 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3464 MonoInternalThread *thread = (MonoInternalThread *)value;
3466 if (ud->nthreads < ud->max_threads)
3467 ud->threads [ud->nthreads ++] = thread;
3471 * Collect running threads into the THREADS array.
3472 * THREADS should be an array allocated on the stack.
3475 collect_threads (MonoInternalThread **thread_array, int max_threads)
3477 CollectThreadsUserData ud;
3479 memset (&ud, 0, sizeof (ud));
3480 /* This array contains refs, but its on the stack, so its ok */
3481 ud.threads = thread_array;
3482 ud.max_threads = max_threads;
3484 mono_threads_lock ();
3485 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3486 mono_threads_unlock ();
3492 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3494 GString* text = g_string_new (0);
3496 GError *error = NULL;
3499 ud->thread = thread;
3502 /* Collect frames for the thread */
3503 if (thread == mono_thread_internal_current ()) {
3504 get_thread_dump (mono_thread_info_current (), ud);
3506 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3510 * Do all the non async-safe work outside of get_thread_dump.
3513 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3515 g_string_append_printf (text, "\n\"%s\"", name);
3518 else if (thread->threadpool_thread) {
3519 g_string_append (text, "\n\"<threadpool thread>\"");
3521 g_string_append (text, "\n\"<unnamed thread>\"");
3524 for (i = 0; i < ud->nframes; ++i) {
3525 MonoStackFrameInfo *frame = &ud->frames [i];
3526 MonoMethod *method = NULL;
3528 if (frame->type == FRAME_TYPE_MANAGED)
3529 method = mono_jit_info_get_method (frame->ji);
3532 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3533 g_string_append_printf (text, " %s\n", location);
3536 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3540 fprintf (stdout, "%s", text->str);
3542 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3543 OutputDebugStringA(text->str);
3546 g_string_free (text, TRUE);
3551 mono_threads_perform_thread_dump (void)
3553 ThreadDumpUserData ud;
3554 MonoInternalThread *thread_array [128];
3555 int tindex, nthreads;
3557 if (!thread_dump_requested)
3560 printf ("Full thread dump:\n");
3562 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3563 nthreads = collect_threads (thread_array, 128);
3565 memset (&ud, 0, sizeof (ud));
3566 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3567 ud.max_frames = 256;
3569 for (tindex = 0; tindex < nthreads; ++tindex)
3570 dump_thread (thread_array [tindex], &ud);
3574 thread_dump_requested = FALSE;
3577 /* Obtain the thread dump of all threads */
3579 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3582 ThreadDumpUserData ud;
3583 MonoInternalThread *thread_array [128];
3584 MonoDomain *domain = mono_domain_get ();
3585 MonoDebugSourceLocation *location;
3586 int tindex, nthreads;
3590 *out_threads = NULL;
3591 *out_stack_frames = NULL;
3593 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3594 nthreads = collect_threads (thread_array, 128);
3596 memset (&ud, 0, sizeof (ud));
3597 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3598 ud.max_frames = 256;
3600 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3603 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3607 for (tindex = 0; tindex < nthreads; ++tindex) {
3608 MonoInternalThread *thread = thread_array [tindex];
3609 MonoArray *thread_frames;
3615 /* Collect frames for the thread */
3616 if (thread == mono_thread_internal_current ()) {
3617 get_thread_dump (mono_thread_info_current (), &ud);
3619 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3622 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3624 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3627 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3629 for (i = 0; i < ud.nframes; ++i) {
3630 MonoStackFrameInfo *frame = &ud.frames [i];
3631 MonoMethod *method = NULL;
3632 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3636 sf->native_offset = frame->native_offset;
3638 if (frame->type == FRAME_TYPE_MANAGED)
3639 method = mono_jit_info_get_method (frame->ji);
3642 sf->method_address = (gsize) frame->ji->code_start;
3644 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3647 MONO_OBJECT_SETREF (sf, method, rm);
3649 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3651 sf->il_offset = location->il_offset;
3653 if (location && location->source_file) {
3654 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3655 sf->line = location->row;
3656 sf->column = location->column;
3658 mono_debug_free_source_location (location);
3663 mono_array_setref (thread_frames, i, sf);
3669 return is_ok (error);
3673 * mono_threads_request_thread_dump:
3675 * Ask all threads except the current to print their stacktrace to stdout.
3678 mono_threads_request_thread_dump (void)
3680 /*The new thread dump code runs out of the finalizer thread. */
3681 thread_dump_requested = TRUE;
3682 mono_gc_finalize_notify ();
3687 gint allocated; /* +1 so that refs [allocated] == NULL */
3691 typedef struct ref_stack RefStack;
3694 ref_stack_new (gint initial_size)
3698 initial_size = MAX (initial_size, 16) + 1;
3699 rs = g_new0 (RefStack, 1);
3700 rs->refs = g_new0 (gpointer, initial_size);
3701 rs->allocated = initial_size;
3706 ref_stack_destroy (gpointer ptr)
3708 RefStack *rs = (RefStack *)ptr;
3717 ref_stack_push (RefStack *rs, gpointer ptr)
3719 g_assert (rs != NULL);
3721 if (rs->bottom >= rs->allocated) {
3722 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3723 rs->allocated <<= 1;
3724 rs->refs [rs->allocated] = NULL;
3726 rs->refs [rs->bottom++] = ptr;
3730 ref_stack_pop (RefStack *rs)
3732 if (rs == NULL || rs->bottom == 0)
3736 rs->refs [rs->bottom] = NULL;
3740 ref_stack_find (RefStack *rs, gpointer ptr)
3747 for (refs = rs->refs; refs && *refs; refs++) {
3755 * mono_thread_push_appdomain_ref:
3757 * Register that the current thread may have references to objects in domain
3758 * @domain on its stack. Each call to this function should be paired with a
3759 * call to pop_appdomain_ref.
3762 mono_thread_push_appdomain_ref (MonoDomain *domain)
3764 MonoInternalThread *thread = mono_thread_internal_current ();
3767 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3768 SPIN_LOCK (thread->lock_thread_id);
3769 if (thread->appdomain_refs == NULL)
3770 thread->appdomain_refs = ref_stack_new (16);
3771 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3772 SPIN_UNLOCK (thread->lock_thread_id);
3777 mono_thread_pop_appdomain_ref (void)
3779 MonoInternalThread *thread = mono_thread_internal_current ();
3782 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3783 SPIN_LOCK (thread->lock_thread_id);
3784 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3785 SPIN_UNLOCK (thread->lock_thread_id);
3790 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3793 SPIN_LOCK (thread->lock_thread_id);
3794 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3795 SPIN_UNLOCK (thread->lock_thread_id);
3800 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3802 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3805 typedef struct abort_appdomain_data {
3806 struct wait_data wait;
3808 } abort_appdomain_data;
3811 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3813 MonoInternalThread *thread = (MonoInternalThread*)value;
3814 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3815 MonoDomain *domain = data->domain;
3817 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3818 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3820 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3821 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3822 data->wait.threads [data->wait.num] = thread;
3825 /* Just ignore the rest, we can't do anything with
3833 * mono_threads_abort_appdomain_threads:
3835 * Abort threads which has references to the given appdomain.
3838 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3840 #ifdef __native_client__
3844 abort_appdomain_data user_data;
3846 int orig_timeout = timeout;
3849 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3851 start_time = mono_msec_ticks ();
3853 mono_threads_lock ();
3855 user_data.domain = domain;
3856 user_data.wait.num = 0;
3857 /* This shouldn't take any locks */
3858 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3859 mono_threads_unlock ();
3861 if (user_data.wait.num > 0) {
3862 /* Abort the threads outside the threads lock */
3863 for (i = 0; i < user_data.wait.num; ++i)
3864 mono_thread_internal_abort (user_data.wait.threads [i]);
3867 * We should wait for the threads either to abort, or to leave the
3868 * domain. We can't do the latter, so we wait with a timeout.
3870 wait_for_tids (&user_data.wait, 100, FALSE);
3873 /* Update remaining time */
3874 timeout -= mono_msec_ticks () - start_time;
3875 start_time = mono_msec_ticks ();
3877 if (orig_timeout != -1 && timeout < 0)
3880 while (user_data.wait.num > 0);
3882 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3888 * mono_thread_get_undeniable_exception:
3890 * Return an exception which needs to be raised when leaving a catch clause.
3891 * This is used for undeniable exception propagation.
3894 mono_thread_get_undeniable_exception (void)
3896 MonoInternalThread *thread = mono_thread_internal_current ();
3898 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3901 // We don't want to have our exception effect calls made by
3902 // the catching block
3904 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3908 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3909 * exception if the thread no longer references a dying appdomain.
3911 thread->abort_exc->trace_ips = NULL;
3912 thread->abort_exc->stack_trace = NULL;
3913 return thread->abort_exc;
3916 #if MONO_SMALL_CONFIG
3917 #define NUM_STATIC_DATA_IDX 4
3918 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3922 #define NUM_STATIC_DATA_IDX 8
3923 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3924 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3928 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3929 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3932 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3934 gpointer *static_data = (gpointer *)addr;
3936 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3937 void **ptr = (void **)static_data [i];
3942 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3943 void **p = ptr + idx;
3946 mark_func ((MonoObject**)p, gc_data);
3952 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3954 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3958 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3960 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3964 * mono_alloc_static_data
3966 * Allocate memory blocks for storing threads or context static data
3969 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3971 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3974 gpointer* static_data = *static_data_ptr;
3976 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3977 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3979 if (mono_gc_user_markers_supported ()) {
3980 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3981 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3983 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3984 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3987 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3988 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3989 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3990 *static_data_ptr = static_data;
3991 static_data [0] = static_data;
3994 for (i = 1; i <= idx; ++i) {
3995 if (static_data [i])
3998 if (mono_gc_user_markers_supported ())
3999 static_data [i] = g_malloc0 (static_data_size [i]);
4001 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4002 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4003 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4008 mono_free_static_data (gpointer* static_data)
4011 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4012 gpointer p = static_data [i];
4016 * At this point, the static data pointer array is still registered with the
4017 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4018 * data. Freeing the individual arrays without first nulling their slots
4019 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4020 * such an already freed array. See bug #13813.
4022 static_data [i] = NULL;
4023 mono_memory_write_barrier ();
4024 if (mono_gc_user_markers_supported ())
4027 mono_gc_free_fixed (p);
4029 mono_gc_free_fixed (static_data);
4033 * mono_init_static_data_info
4035 * Initializes static data counters
4037 static void mono_init_static_data_info (StaticDataInfo *static_data)
4039 static_data->idx = 0;
4040 static_data->offset = 0;
4041 static_data->freelist = NULL;
4045 * mono_alloc_static_data_slot
4047 * Generates an offset for static data. static_data contains the counters
4048 * used to generate it.
4051 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4053 if (!static_data->idx && !static_data->offset) {
4055 * we use the first chunk of the first allocation also as
4056 * an array for the rest of the data
4058 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4060 static_data->offset += align - 1;
4061 static_data->offset &= ~(align - 1);
4062 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4063 static_data->idx ++;
4064 g_assert (size <= static_data_size [static_data->idx]);
4065 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4066 static_data->offset = 0;
4068 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4069 static_data->offset += size;
4074 * LOCKING: requires that threads_mutex is held
4077 context_adjust_static_data (MonoAppContext *ctx)
4079 if (context_static_info.offset || context_static_info.idx > 0) {
4080 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4081 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4082 ctx->data->static_data = ctx->static_data;
4087 * LOCKING: requires that threads_mutex is held
4090 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4092 MonoInternalThread *thread = (MonoInternalThread *)value;
4093 guint32 offset = GPOINTER_TO_UINT (user);
4095 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4099 * LOCKING: requires that threads_mutex is held
4102 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4104 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4109 guint32 offset = GPOINTER_TO_UINT (user);
4110 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4111 ctx->data->static_data = ctx->static_data;
4114 static StaticDataFreeList*
4115 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4117 StaticDataFreeList* prev = NULL;
4118 StaticDataFreeList* tmp = static_data->freelist;
4120 if (tmp->size == size) {
4122 prev->next = tmp->next;
4124 static_data->freelist = tmp->next;
4133 #if SIZEOF_VOID_P == 4
4140 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4142 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4144 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4145 MonoBitSet *rb = sets [idx];
4146 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4147 offset /= sizeof (uintptr_t);
4148 /* offset is now the bitmap offset */
4149 for (int i = 0; i < numbits; ++i) {
4150 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4151 mono_bitset_set_fast (rb, offset + i);
4156 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4158 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4159 MonoBitSet *rb = sets [idx];
4160 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4161 offset /= sizeof (uintptr_t);
4162 /* offset is now the bitmap offset */
4163 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4164 mono_bitset_clear_fast (rb, offset + i);
4168 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4170 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4172 StaticDataInfo *info;
4175 if (static_type == SPECIAL_STATIC_THREAD) {
4176 info = &thread_static_info;
4177 sets = thread_reference_bitmaps;
4179 info = &context_static_info;
4180 sets = context_reference_bitmaps;
4183 mono_threads_lock ();
4185 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4189 offset = item->offset;
4192 offset = mono_alloc_static_data_slot (info, size, align);
4195 update_reference_bitmap (sets, offset, bitmap, numbits);
4197 if (static_type == SPECIAL_STATIC_THREAD) {
4198 /* This can be called during startup */
4199 if (threads != NULL)
4200 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4202 if (contexts != NULL)
4203 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4205 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4208 mono_threads_unlock ();
4214 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4216 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4218 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4219 return get_thread_static_data (thread, offset);
4221 return get_context_static_data (thread->current_appcontext, offset);
4226 mono_get_special_static_data (guint32 offset)
4228 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4237 * LOCKING: requires that threads_mutex is held
4240 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4242 MonoInternalThread *thread = (MonoInternalThread *)value;
4243 OffsetSize *data = (OffsetSize *)user;
4244 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4245 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4248 if (!thread->static_data || !thread->static_data [idx])
4250 ptr = ((char*) thread->static_data [idx]) + off;
4251 mono_gc_bzero_atomic (ptr, data->size);
4255 * LOCKING: requires that threads_mutex is held
4258 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4260 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4265 OffsetSize *data = (OffsetSize *)user;
4266 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4267 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4270 if (!ctx->static_data || !ctx->static_data [idx])
4273 ptr = ((char*) ctx->static_data [idx]) + off;
4274 mono_gc_bzero_atomic (ptr, data->size);
4278 do_free_special_slot (guint32 offset, guint32 size)
4280 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4282 StaticDataInfo *info;
4284 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4285 info = &thread_static_info;
4286 sets = thread_reference_bitmaps;
4288 info = &context_static_info;
4289 sets = context_reference_bitmaps;
4292 guint32 data_offset = offset;
4293 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4294 OffsetSize data = { data_offset, size };
4296 clear_reference_bitmap (sets, data.offset, data.size);
4298 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4299 if (threads != NULL)
4300 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4302 if (contexts != NULL)
4303 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4306 if (!mono_runtime_is_shutting_down ()) {
4307 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4309 item->offset = offset;
4312 item->next = info->freelist;
4313 info->freelist = item;
4318 do_free_special (gpointer key, gpointer value, gpointer data)
4320 MonoClassField *field = (MonoClassField *)key;
4321 guint32 offset = GPOINTER_TO_UINT (value);
4324 size = mono_type_size (field->type, &align);
4325 do_free_special_slot (offset, size);
4329 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4331 mono_threads_lock ();
4333 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4335 mono_threads_unlock ();
4339 static void CALLBACK dummy_apc (ULONG_PTR param)
4345 * mono_thread_execute_interruption
4347 * Performs the operation that the requested thread state requires (abort,
4350 static MonoException*
4351 mono_thread_execute_interruption (void)
4353 MonoInternalThread *thread = mono_thread_internal_current ();
4354 MonoThread *sys_thread = mono_thread_current ();
4356 LOCK_THREAD (thread);
4358 /* MonoThread::interruption_requested can only be changed with atomics */
4359 if (mono_thread_clear_interruption_requested (thread)) {
4360 /* this will consume pending APC calls */
4362 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4364 /* Clear the interrupted flag of the thread so it can wait again */
4365 mono_thread_info_clear_self_interrupt ();
4368 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4369 if (sys_thread->pending_exception) {
4372 exc = sys_thread->pending_exception;
4373 sys_thread->pending_exception = NULL;
4375 UNLOCK_THREAD (thread);
4377 } else if (thread->state & (ThreadState_AbortRequested)) {
4378 UNLOCK_THREAD (thread);
4379 g_assert (sys_thread->pending_exception == NULL);
4380 if (thread->abort_exc == NULL) {
4382 * This might be racy, but it has to be called outside the lock
4383 * since it calls managed code.
4385 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4387 return thread->abort_exc;
4388 } else if (thread->state & (ThreadState_SuspendRequested)) {
4389 /* calls UNLOCK_THREAD (thread) */
4390 self_suspend_internal ();
4392 } else if (thread->thread_interrupt_requested) {
4394 thread->thread_interrupt_requested = FALSE;
4395 UNLOCK_THREAD (thread);
4397 return(mono_get_exception_thread_interrupted ());
4400 UNLOCK_THREAD (thread);
4406 * mono_thread_request_interruption
4408 * A signal handler can call this method to request the interruption of a
4409 * thread. The result of the interruption will depend on the current state of
4410 * the thread. If the result is an exception that needs to be throw, it is
4411 * provided as return value.
4414 mono_thread_request_interruption (gboolean running_managed)
4416 MonoInternalThread *thread = mono_thread_internal_current ();
4418 /* The thread may already be stopping */
4422 if (!mono_thread_set_interruption_requested (thread))
4425 if (!running_managed || is_running_protected_wrapper ()) {
4426 /* Can't stop while in unmanaged code. Increase the global interruption
4427 request count. When exiting the unmanaged method the count will be
4428 checked and the thread will be interrupted. */
4430 /* this will awake the thread if it is in WaitForSingleObject
4432 /* Our implementation of this function ignores the func argument */
4434 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4436 mono_thread_info_self_interrupt ();
4441 return mono_thread_execute_interruption ();
4445 /*This function should be called by a thread after it has exited all of
4446 * its handle blocks at interruption time.*/
4448 mono_thread_resume_interruption (gboolean exec)
4450 MonoInternalThread *thread = mono_thread_internal_current ();
4451 gboolean still_aborting;
4453 /* The thread may already be stopping */
4457 LOCK_THREAD (thread);
4458 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4459 UNLOCK_THREAD (thread);
4461 /*This can happen if the protected block called Thread::ResetAbort*/
4462 if (!still_aborting)
4465 if (!mono_thread_set_interruption_requested (thread))
4468 mono_thread_info_self_interrupt ();
4471 return mono_thread_execute_interruption ();
4476 gboolean mono_thread_interruption_requested ()
4478 if (thread_interruption_requested) {
4479 MonoInternalThread *thread = mono_thread_internal_current ();
4480 /* The thread may already be stopping */
4482 return mono_thread_get_interruption_requested (thread);
4487 static MonoException*
4488 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4490 MonoInternalThread *thread = mono_thread_internal_current ();
4492 /* The thread may already be stopping */
4495 if (!mono_thread_get_interruption_requested (thread))
4497 if (!bypass_abort_protection && is_running_protected_wrapper ())
4500 return mono_thread_execute_interruption ();
4504 * Performs the interruption of the current thread, if one has been requested,
4505 * and the thread is not running a protected wrapper.
4506 * Return the exception which needs to be thrown, if any.
4509 mono_thread_interruption_checkpoint (void)
4511 return mono_thread_interruption_checkpoint_request (FALSE);
4515 * Performs the interruption of the current thread, if one has been requested.
4516 * Return the exception which needs to be thrown, if any.
4519 mono_thread_force_interruption_checkpoint_noraise (void)
4521 return mono_thread_interruption_checkpoint_request (TRUE);
4525 * mono_set_pending_exception:
4527 * Set the pending exception of the current thread to EXC.
4528 * The exception will be thrown when execution returns to managed code.
4531 mono_set_pending_exception (MonoException *exc)
4533 MonoThread *thread = mono_thread_current ();
4535 /* The thread may already be stopping */
4539 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4541 mono_thread_request_interruption (FALSE);
4545 * mono_thread_interruption_request_flag:
4547 * Returns the address of a flag that will be non-zero if an interruption has
4548 * been requested for a thread. The thread to interrupt may not be the current
4549 * thread, so an additional call to mono_thread_interruption_requested() or
4550 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4553 gint32* mono_thread_interruption_request_flag ()
4555 return &thread_interruption_requested;
4559 mono_thread_init_apartment_state (void)
4562 MonoInternalThread* thread = mono_thread_internal_current ();
4564 /* Positive return value indicates success, either
4565 * S_OK if this is first CoInitialize call, or
4566 * S_FALSE if CoInitialize already called, but with same
4567 * threading model. A negative value indicates failure,
4568 * probably due to trying to change the threading model.
4570 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4571 ? COINIT_APARTMENTTHREADED
4572 : COINIT_MULTITHREADED) < 0) {
4573 thread->apartment_state = ThreadApartmentState_Unknown;
4579 mono_thread_cleanup_apartment_state (void)
4582 MonoInternalThread* thread = mono_thread_internal_current ();
4584 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4591 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4593 LOCK_THREAD (thread);
4594 thread->state |= state;
4595 UNLOCK_THREAD (thread);
4599 * mono_thread_test_and_set_state:
4601 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4603 * Returns TRUE is @set was OR'd in.
4606 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4608 LOCK_THREAD (thread);
4610 if ((thread->state & test) != 0) {
4611 UNLOCK_THREAD (thread);
4615 thread->state |= set;
4616 UNLOCK_THREAD (thread);
4622 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4624 LOCK_THREAD (thread);
4625 thread->state &= ~state;
4626 UNLOCK_THREAD (thread);
4630 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4632 gboolean ret = FALSE;
4634 LOCK_THREAD (thread);
4636 if ((thread->state & test) != 0) {
4640 UNLOCK_THREAD (thread);
4646 self_interrupt_thread (void *_unused)
4649 MonoThreadInfo *info;
4651 exc = mono_thread_execute_interruption ();
4653 if (mono_threads_is_coop_enabled ()) {
4654 /* We can return from an async call in coop, as
4655 * it's simply called when exiting the safepoint */
4659 g_error ("%s: we can't resume from an async call", __func__);
4662 info = mono_thread_info_current ();
4664 /* We must use _with_context since we didn't trampoline into the runtime */
4665 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. */
4669 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4673 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4677 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4679 MonoJitInfo **dest = (MonoJitInfo **)data;
4685 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4687 MonoJitInfo *ji = NULL;
4692 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4693 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4694 * where we hold runtime locks.
4696 if (!mono_threads_is_coop_enabled ())
4697 mono_thread_info_set_is_async_context (TRUE);
4698 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4699 if (!mono_threads_is_coop_enabled ())
4700 mono_thread_info_set_is_async_context (FALSE);
4705 MonoInternalThread *thread;
4706 gboolean install_async_abort;
4707 MonoThreadInfoInterruptToken *interrupt_token;
4710 static SuspendThreadResult
4711 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4713 AbortThreadData *data = (AbortThreadData *)ud;
4714 MonoInternalThread *thread = data->thread;
4715 MonoJitInfo *ji = NULL;
4716 gboolean protected_wrapper;
4717 gboolean running_managed;
4719 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4720 return MonoResumeThread;
4722 /*someone is already interrupting it*/
4723 if (!mono_thread_set_interruption_requested (thread))
4724 return MonoResumeThread;
4726 ji = mono_thread_info_get_last_managed (info);
4727 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4728 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4730 if (!protected_wrapper && running_managed) {
4731 /*We are in managed code*/
4732 /*Set the thread to call */
4733 if (data->install_async_abort)
4734 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4735 return MonoResumeThread;
4738 * This will cause waits to be broken.
4739 * It will also prevent the thread from entering a wait, so if the thread returns
4740 * from the wait before it receives the abort signal, it will just spin in the wait
4741 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4744 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4746 return MonoResumeThread;
4751 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4753 AbortThreadData data;
4755 g_assert (thread != mono_thread_internal_current ());
4757 data.thread = thread;
4758 data.install_async_abort = install_async_abort;
4759 data.interrupt_token = NULL;
4761 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4762 if (data.interrupt_token)
4763 mono_thread_info_finish_interrupt (data.interrupt_token);
4764 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4768 self_abort_internal (MonoError *error)
4774 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4775 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4778 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.
4780 exc = mono_thread_request_interruption (TRUE);
4782 mono_error_set_exception_instance (error, exc);
4784 mono_thread_info_self_interrupt ();
4788 MonoInternalThread *thread;
4790 MonoThreadInfoInterruptToken *interrupt_token;
4791 } SuspendThreadData;
4793 static SuspendThreadResult
4794 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4796 SuspendThreadData *data = (SuspendThreadData *)ud;
4797 MonoInternalThread *thread = data->thread;
4798 MonoJitInfo *ji = NULL;
4799 gboolean protected_wrapper;
4800 gboolean running_managed;
4802 ji = mono_thread_info_get_last_managed (info);
4803 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4804 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4806 if (running_managed && !protected_wrapper) {
4807 if (mono_threads_is_coop_enabled ()) {
4808 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4809 return MonoResumeThread;
4811 thread->state &= ~ThreadState_SuspendRequested;
4812 thread->state |= ThreadState_Suspended;
4813 return KeepSuspended;
4816 mono_thread_set_interruption_requested (thread);
4817 if (data->interrupt)
4818 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4820 return MonoResumeThread;
4824 /* LOCKING: called with @thread synch_cs held, and releases it */
4826 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4828 SuspendThreadData data;
4830 g_assert (thread != mono_thread_internal_current ());
4832 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4834 thread->self_suspended = FALSE;
4836 data.thread = thread;
4837 data.interrupt = interrupt;
4838 data.interrupt_token = NULL;
4840 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4841 if (data.interrupt_token)
4842 mono_thread_info_finish_interrupt (data.interrupt_token);
4844 UNLOCK_THREAD (thread);
4847 /* LOCKING: called with @thread synch_cs held, and releases it */
4849 self_suspend_internal (void)
4851 MonoInternalThread *thread;
4853 MonoOSEventWaitRet res;
4855 thread = mono_thread_internal_current ();
4857 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4859 thread->self_suspended = TRUE;
4861 thread->state &= ~ThreadState_SuspendRequested;
4862 thread->state |= ThreadState_Suspended;
4864 UNLOCK_THREAD (thread);
4866 event = thread->suspended;
4869 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4870 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4875 suspend_for_shutdown_async_call (gpointer unused)
4878 mono_thread_info_yield ();
4881 static SuspendThreadResult
4882 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4884 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4885 return MonoResumeThread;
4889 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4891 g_assert (thread != mono_thread_internal_current ());
4893 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4897 * mono_thread_is_foreign:
4898 * @thread: the thread to query
4900 * This function allows one to determine if a thread was created by the mono runtime and has
4901 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4903 * Returns: TRUE if @thread was not created by the runtime.
4906 mono_thread_is_foreign (MonoThread *thread)
4908 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4909 return info->runtime_thread == FALSE;
4913 * mono_add_joinable_thread:
4915 * Add TID to the list of joinable threads.
4916 * LOCKING: Acquires the threads lock.
4919 mono_threads_add_joinable_thread (gpointer tid)
4923 * We cannot detach from threads because it causes problems like
4924 * 2fd16f60/r114307. So we collect them and join them when
4925 * we have time (in he finalizer thread).
4927 joinable_threads_lock ();
4928 if (!joinable_threads)
4929 joinable_threads = g_hash_table_new (NULL, NULL);
4930 g_hash_table_insert (joinable_threads, tid, tid);
4931 joinable_thread_count ++;
4932 joinable_threads_unlock ();
4934 mono_gc_finalize_notify ();
4939 * mono_threads_join_threads:
4941 * Join all joinable threads. This is called from the finalizer thread.
4942 * LOCKING: Acquires the threads lock.
4945 mono_threads_join_threads (void)
4948 GHashTableIter iter;
4955 if (!joinable_thread_count)
4959 joinable_threads_lock ();
4961 if (g_hash_table_size (joinable_threads)) {
4962 g_hash_table_iter_init (&iter, joinable_threads);
4963 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4964 thread = (pthread_t)tid;
4965 g_hash_table_remove (joinable_threads, key);
4966 joinable_thread_count --;
4969 joinable_threads_unlock ();
4971 if (thread != pthread_self ()) {
4973 /* This shouldn't block */
4974 mono_threads_join_lock ();
4975 mono_native_thread_join (thread);
4976 mono_threads_join_unlock ();
4989 * Wait for thread TID to exit.
4990 * LOCKING: Acquires the threads lock.
4993 mono_thread_join (gpointer tid)
4997 gboolean found = FALSE;
4999 joinable_threads_lock ();
5000 if (!joinable_threads)
5001 joinable_threads = g_hash_table_new (NULL, NULL);
5002 if (g_hash_table_lookup (joinable_threads, tid)) {
5003 g_hash_table_remove (joinable_threads, tid);
5004 joinable_thread_count --;
5007 joinable_threads_unlock ();
5010 thread = (pthread_t)tid;
5012 mono_native_thread_join (thread);
5018 mono_thread_internal_unhandled_exception (MonoObject* exc)
5020 MonoClass *klass = exc->vtable->klass;
5021 if (is_threadabort_exception (klass)) {
5022 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5023 } else if (!is_appdomainunloaded_exception (klass)
5024 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5025 mono_unhandled_exception (exc);
5026 if (mono_environment_exitcode_get () == 1) {
5027 mono_environment_exitcode_set (255);
5028 mono_invoke_unhandled_exception_hook (exc);
5029 g_assert_not_reached ();
5035 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5038 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5039 mono_error_set_pending_exception (&error);
5043 * mono_threads_attach_coop: called by native->managed wrappers
5047 * - @return: the original domain which needs to be restored, or NULL.
5050 * - @dummy: contains the original domain
5051 * - @return: a cookie containing current MonoThreadInfo*.
5054 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5057 gboolean fresh_thread = FALSE;
5060 /* Happens when called from AOTed code which is only used in the root domain. */
5061 domain = mono_get_root_domain ();
5066 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5067 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5068 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5069 * we're only responsible for making the cookie. */
5070 if (mono_threads_is_coop_enabled ()) {
5071 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5072 fresh_thread = !info || !mono_thread_info_is_live (info);
5075 if (!mono_thread_internal_current ()) {
5076 mono_thread_attach_full (domain, FALSE);
5079 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5082 orig = mono_domain_get ();
5084 mono_domain_set (domain, TRUE);
5086 if (!mono_threads_is_coop_enabled ())
5087 return orig != domain ? orig : NULL;
5091 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5092 * return the right cookie. */
5093 return mono_threads_enter_gc_unsafe_region_cookie ();
5096 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5097 return mono_threads_enter_gc_unsafe_region (dummy);
5102 * mono_threads_detach_coop: called by native->managed wrappers
5105 * - @cookie: the original domain which needs to be restored, or NULL.
5109 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5110 * - @dummy: contains the original domain
5113 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5115 MonoDomain *domain, *orig;
5117 if (!mono_threads_is_coop_enabled ()) {
5118 orig = (MonoDomain*) cookie;
5120 mono_domain_set (orig, TRUE);
5122 orig = (MonoDomain*) *dummy;
5124 domain = mono_domain_get ();
5127 /* it won't do anything if cookie is NULL
5128 * thread state RUNNING -> (RUNNING|BLOCKING) */
5129 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5131 if (orig != domain) {
5133 mono_domain_unset ();
5135 mono_domain_set (orig, TRUE);
5141 /* Returns TRUE if the current thread is ready to be interrupted. */
5143 mono_threads_is_ready_to_be_interrupted (void)
5145 MonoInternalThread *thread;
5147 thread = mono_thread_internal_current ();
5148 LOCK_THREAD (thread);
5149 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5150 UNLOCK_THREAD (thread);
5154 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5155 UNLOCK_THREAD (thread);
5159 UNLOCK_THREAD (thread);
5165 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5167 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5169 if (internal->thread_info) {
5170 g_string_append (text, ", state : ");
5171 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5174 if (internal->owned_mutexes) {
5177 g_string_append (text, ", owns : [");
5178 for (i = 0; i < internal->owned_mutexes->len; i++)
5179 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5180 g_string_append (text, "]");
5185 mono_thread_internal_is_current (MonoInternalThread *internal)
5187 g_assert (internal);
5188 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));