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/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/mono-threads-coop.h>
41 #include <mono/utils/hazard-pointer.h>
42 #include <mono/utils/mono-tls.h>
43 #include <mono/utils/atomic.h>
44 #include <mono/utils/mono-memory-model.h>
45 #include <mono/utils/mono-threads-coop.h>
46 #include <mono/utils/mono-error-internals.h>
47 #include <mono/utils/w32handle.h>
49 #include <mono/metadata/gc-internals.h>
50 #include <mono/metadata/reflection-internals.h>
56 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
57 #define USE_TKILL_ON_ANDROID 1
60 #ifdef PLATFORM_ANDROID
63 #ifdef USE_TKILL_ON_ANDROID
64 extern int tkill (pid_t tid, int signal);
68 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
69 #define THREAD_DEBUG(a)
70 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
71 #define THREAD_WAIT_DEBUG(a)
72 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
73 #define LIBGC_DEBUG(a)
75 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
76 #define SPIN_LOCK(i) do { \
77 if (SPIN_TRYLOCK (i)) \
81 #define SPIN_UNLOCK(i) i = 0
83 #define LOCK_THREAD(thread) lock_thread((thread))
84 #define UNLOCK_THREAD(thread) unlock_thread((thread))
96 typedef struct _StaticDataFreeList StaticDataFreeList;
97 struct _StaticDataFreeList {
98 StaticDataFreeList *next;
106 StaticDataFreeList *freelist;
109 /* Number of cached culture objects in the MonoThread->cached_culture_info array
110 * (per-type): we use the first NUM entries for CultureInfo and the last for
111 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
113 #define NUM_CACHED_CULTURES 4
114 #define CULTURES_START_IDX 0
115 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
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;
151 /* The TLS key that holds the MonoObject assigned to each thread */
152 static MonoNativeTlsKey current_object_key;
155 /* Protected by the threads lock */
156 static GHashTable *joinable_threads;
157 static int joinable_thread_count;
159 #ifdef MONO_HAVE_FAST_TLS
160 /* we need to use both the Tls* functions and __thread because
161 * the gc needs to see all the threads
163 MONO_FAST_TLS_DECLARE(tls_current_object);
164 #define SET_CURRENT_OBJECT(x) do { \
165 MONO_FAST_TLS_SET (tls_current_object, x); \
166 mono_native_tls_set_value (current_object_key, x); \
168 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
170 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
171 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
174 /* function called at thread start */
175 static MonoThreadStartCB mono_thread_start_cb = NULL;
177 /* function called at thread attach */
178 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
180 /* function called at thread cleanup */
181 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
183 /* The default stack size for each thread */
184 static guint32 default_stacksize = 0;
185 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
187 static void context_adjust_static_data (MonoAppContext *ctx);
188 static void mono_free_static_data (gpointer* static_data);
189 static void mono_init_static_data_info (StaticDataInfo *static_data);
190 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
191 static gboolean mono_thread_resume (MonoInternalThread* thread);
192 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
193 static void self_abort_internal (MonoError *error);
194 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
195 static void self_suspend_internal (void);
197 static MonoException* mono_thread_execute_interruption (void);
198 static void ref_stack_destroy (gpointer rs);
200 /* Spin lock for InterlockedXXX 64 bit functions */
201 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
202 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
203 static mono_mutex_t interlocked_mutex;
205 /* global count of thread interruptions requested */
206 static gint32 thread_interruption_requested = 0;
208 /* Event signaled when a thread changes its background mode */
209 static HANDLE background_change_event;
211 static gboolean shutting_down = FALSE;
213 static gint32 managed_thread_id_counter = 0;
215 /* Class lazy loading functions */
216 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
219 mono_threads_lock (void)
221 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
225 mono_threads_unlock (void)
227 mono_locks_coop_release (&threads_mutex, ThreadsLock);
232 get_next_managed_thread_id (void)
234 return InterlockedIncrement (&managed_thread_id_counter);
238 mono_thread_get_tls_key (void)
240 return current_object_key;
244 mono_thread_get_tls_offset (void)
249 if (current_object_key)
250 offset = current_object_key;
252 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
257 static inline MonoNativeThreadId
258 thread_get_tid (MonoInternalThread *thread)
260 /* We store the tid as a guint64 to keep the object layout constant between platforms */
261 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
264 static void ensure_synch_cs_set (MonoInternalThread *thread)
266 MonoCoopMutex *synch_cs;
268 if (thread->synch_cs != NULL) {
272 synch_cs = g_new0 (MonoCoopMutex, 1);
273 mono_coop_mutex_init_recursive (synch_cs);
275 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
276 synch_cs, NULL) != NULL) {
277 /* Another thread must have installed this CS */
278 mono_coop_mutex_destroy (synch_cs);
284 lock_thread (MonoInternalThread *thread)
286 if (!thread->synch_cs)
287 ensure_synch_cs_set (thread);
289 g_assert (thread->synch_cs);
291 mono_coop_mutex_lock (thread->synch_cs);
295 unlock_thread (MonoInternalThread *thread)
297 mono_coop_mutex_unlock (thread->synch_cs);
300 static inline gboolean
301 is_appdomainunloaded_exception (MonoClass *klass)
303 return klass == mono_class_get_appdomain_unloaded_exception_class ();
306 static inline gboolean
307 is_threadabort_exception (MonoClass *klass)
309 return klass == mono_defaults.threadabortexception_class;
313 * NOTE: this function can be called also for threads different from the current one:
314 * make sure no code called from it will ever assume it is run on the thread that is
315 * getting cleaned up.
317 static void thread_cleanup (MonoInternalThread *thread)
321 g_assert (thread != NULL);
323 if (thread->abort_state_handle) {
324 mono_gchandle_free (thread->abort_state_handle);
325 thread->abort_state_handle = 0;
327 thread->abort_exc = NULL;
328 thread->current_appcontext = NULL;
331 * This is necessary because otherwise we might have
332 * cross-domain references which will not get cleaned up when
333 * the target domain is unloaded.
335 if (thread->cached_culture_info) {
337 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
338 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
342 * thread->synch_cs can be NULL if this was called after
343 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
344 * This can happen only during shutdown.
345 * The shutting_down flag is not always set, so we can't assert on it.
347 if (thread->synch_cs)
348 LOCK_THREAD (thread);
350 thread->state |= ThreadState_Stopped;
351 thread->state &= ~ThreadState_Background;
353 if (thread->synch_cs)
354 UNLOCK_THREAD (thread);
357 An interruption request has leaked to cleanup. Adjust the global counter.
359 This can happen is the abort source thread finds the abortee (this) thread
360 in unmanaged code. If this thread never trips back to managed code or check
361 the local flag it will be left set and positively unbalance the global counter.
363 Leaving the counter unbalanced will cause a performance degradation since all threads
364 will now keep checking their local flags all the time.
366 if (InterlockedExchange (&thread->interruption_requested, 0))
367 InterlockedDecrement (&thread_interruption_requested);
369 mono_threads_lock ();
373 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
374 /* We have to check whether the thread object for the
375 * tid is still the same in the table because the
376 * thread might have been destroyed and the tid reused
377 * in the meantime, in which case the tid would be in
378 * the table, but with another thread object.
382 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
386 mono_threads_unlock ();
388 /* Don't close the handle here, wait for the object finalizer
389 * to do it. Otherwise, the following race condition applies:
391 * 1) Thread exits (and thread_cleanup() closes the handle)
393 * 2) Some other handle is reassigned the same slot
395 * 3) Another thread tries to join the first thread, and
396 * blocks waiting for the reassigned handle to be signalled
397 * (which might never happen). This is possible, because the
398 * thread calling Join() still has a reference to the first
402 /* if the thread is not in the hash it has been removed already */
404 if (thread == mono_thread_internal_current ()) {
405 mono_domain_unset ();
406 mono_memory_barrier ();
408 if (mono_thread_cleanup_fn)
409 mono_thread_cleanup_fn (thread_get_tid (thread));
412 mono_release_type_locks (thread);
414 /* Can happen when we attach the profiler helper thread in order to heapshot. */
415 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
416 mono_profiler_thread_end (thread->tid);
418 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
420 if (thread == mono_thread_internal_current ()) {
422 * This will signal async signal handlers that the thread has exited.
423 * The profiler callback needs this to be set, so it cannot be done earlier.
425 mono_domain_unset ();
426 mono_memory_barrier ();
429 if (thread == mono_thread_internal_current ())
430 mono_thread_pop_appdomain_ref ();
432 thread->cached_culture_info = NULL;
434 mono_free_static_data (thread->static_data);
435 thread->static_data = NULL;
436 ref_stack_destroy (thread->appdomain_refs);
437 thread->appdomain_refs = NULL;
439 if (mono_thread_cleanup_fn)
440 mono_thread_cleanup_fn (thread_get_tid (thread));
442 if (mono_gc_is_moving ()) {
443 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
444 thread->thread_pinning_ref = NULL;
450 * A special static data offset (guint32) consists of 3 parts:
452 * [0] 6-bit index into the array of chunks.
453 * [6] 25-bit offset into the array.
454 * [31] Bit indicating thread or context static.
459 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
470 } SpecialStaticOffset;
472 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
473 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
475 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
476 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
477 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
478 (((SpecialStaticOffset *) &(x))->fields.f)
481 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
483 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
485 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
486 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
488 return ((char *) thread->static_data [idx]) + off;
492 get_context_static_data (MonoAppContext *ctx, guint32 offset)
494 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
496 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
497 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
499 return ((char *) ctx->static_data [idx]) + off;
503 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
505 static MonoClassField *current_thread_field = NULL;
509 if (!current_thread_field) {
510 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
511 g_assert (current_thread_field);
514 mono_class_vtable (domain, mono_defaults.thread_class);
515 mono_domain_lock (domain);
516 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
517 mono_domain_unlock (domain);
520 return (MonoThread **)get_thread_static_data (thread, offset);
524 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
526 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
528 g_assert (current->obj.vtable->domain == domain);
530 g_assert (!*current_thread_ptr);
531 *current_thread_ptr = current;
535 create_thread_object (MonoDomain *domain)
538 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
539 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, &error);
540 /* only possible failure mode is OOM, from which we don't expect to recover. */
541 mono_error_assert_ok (&error);
546 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
550 thread = create_thread_object (domain);
551 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
553 MONO_OBJECT_SETREF (thread, internal_thread, internal);
558 static MonoInternalThread*
559 create_internal_thread (void)
562 MonoInternalThread *thread;
565 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
566 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
567 /* only possible failure mode is OOM, from which we don't exect to recover */
568 mono_error_assert_ok (&error);
570 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
571 mono_coop_mutex_init_recursive (thread->synch_cs);
573 thread->apartment_state = ThreadApartmentState_Unknown;
574 thread->managed_id = get_next_managed_thread_id ();
575 if (mono_gc_is_moving ()) {
576 thread->thread_pinning_ref = thread;
577 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
584 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
587 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
589 MonoThreadInfo *info;
590 MonoInternalThread *internal;
591 MonoDomain *domain, *root_domain;
595 info = mono_thread_info_current ();
597 internal = thread->internal_thread;
598 internal->handle = mono_thread_info_get_handle (info);
599 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
600 internal->thread_info = info;
601 internal->small_id = info->small_id;
602 internal->stack_ptr = stack_ptr;
604 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
606 SET_CURRENT_OBJECT (internal);
608 domain = mono_object_domain (thread);
610 mono_thread_push_appdomain_ref (domain);
611 if (!mono_domain_set (domain, force_domain)) {
612 mono_thread_pop_appdomain_ref ();
616 mono_threads_lock ();
618 if (threads_starting_up)
619 mono_g_hash_table_remove (threads_starting_up, thread);
621 if (shutting_down && !force_attach) {
622 mono_threads_unlock ();
627 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
628 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
631 /* We don't need to duplicate thread->handle, because it is
632 * only closed when the thread object is finalized by the GC. */
633 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
635 /* We have to do this here because mono_thread_start_cb
636 * requires that root_domain_thread is set up. */
637 if (thread_static_info.offset || thread_static_info.idx > 0) {
638 /* get the current allocated size */
639 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
640 mono_alloc_static_data (&internal->static_data, offset, TRUE);
643 mono_threads_unlock ();
645 root_domain = mono_get_root_domain ();
647 g_assert (!internal->root_domain_thread);
648 if (domain != root_domain)
649 MONO_OBJECT_SETREF (internal, root_domain_thread, new_thread_with_internal (root_domain, internal));
651 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
653 if (domain != root_domain)
654 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
656 set_current_thread_for_domain (domain, internal, thread);
658 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
666 MonoObject *start_delegate;
667 MonoObject *start_delegate_arg;
668 MonoThreadStart start_func;
669 gpointer start_func_arg;
671 MonoCoopSem registered;
674 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
677 MonoThreadStart start_func;
678 void *start_func_arg;
681 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
685 MonoInternalThread *internal;
686 MonoObject *start_delegate;
687 MonoObject *start_delegate_arg;
690 thread = start_info->thread;
691 internal = thread->internal_thread;
692 domain = mono_object_domain (start_info->thread);
694 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
696 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
697 start_info->failed = TRUE;
699 mono_coop_sem_post (&start_info->registered);
701 if (InterlockedDecrement (&start_info->ref) == 0) {
702 mono_coop_sem_destroy (&start_info->registered);
711 start_delegate = start_info->start_delegate;
712 start_delegate_arg = start_info->start_delegate_arg;
713 start_func = start_info->start_func;
714 start_func_arg = start_info->start_func_arg;
716 /* This MUST be called before any managed code can be
717 * executed, as it calls the callback function that (for the
718 * jit) sets the lmf marker.
721 if (mono_thread_start_cb)
722 mono_thread_start_cb (tid, stack_ptr, start_func);
724 /* On 2.0 profile (and higher), set explicitly since state might have been
726 if (internal->apartment_state == ThreadApartmentState_Unknown)
727 internal->apartment_state = ThreadApartmentState_MTA;
729 mono_thread_init_apartment_state ();
731 /* Let the thread that called Start() know we're ready */
732 mono_coop_sem_post (&start_info->registered);
734 if (InterlockedDecrement (&start_info->ref) == 0) {
735 mono_coop_sem_destroy (&start_info->registered);
739 /* start_info is not valid anymore */
743 * Call this after calling start_notify, since the profiler callback might want
744 * to lock the thread, and the lock is held by thread_start () which waits for
747 mono_profiler_thread_start (tid);
749 /* if the name was set before starting, we didn't invoke the profiler callback */
750 if (internal->name) {
751 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
752 mono_profiler_thread_name (internal->tid, tname);
753 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
757 /* start_func is set only for unmanaged start functions */
759 start_func (start_func_arg);
763 g_assert (start_delegate != NULL);
765 /* we may want to handle the exception here. See comment below on unhandled exceptions */
766 args [0] = (gpointer) start_delegate_arg;
767 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
769 if (!mono_error_ok (&error)) {
770 MonoException *ex = mono_error_convert_to_exception (&error);
772 g_assert (ex != NULL);
773 MonoClass *klass = mono_object_get_class (&ex->object);
774 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
775 !is_threadabort_exception (klass)) {
776 mono_unhandled_exception (&ex->object);
777 mono_invoke_unhandled_exception_hook (&ex->object);
778 g_assert_not_reached ();
781 mono_error_cleanup (&error);
785 /* If the thread calls ExitThread at all, this remaining code
786 * will not be executed, but the main thread will eventually
787 * call thread_cleanup() on this thread's behalf.
790 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
792 /* Do any cleanup needed for apartment state. This
793 * cannot be done in thread_cleanup since thread_cleanup could be
794 * called for a thread other than the current thread.
795 * mono_thread_cleanup_apartment_state cleans up apartment
796 * for the current thead */
797 mono_thread_cleanup_apartment_state ();
799 thread_cleanup (internal);
803 /* Remove the reference to the thread object in the TLS data,
804 * so the thread object can be finalized. This won't be
805 * reached if the thread threw an uncaught exception, so those
806 * thread handles will stay referenced :-( (This is due to
807 * missing support for scanning thread-specific data in the
808 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
811 SET_CURRENT_OBJECT (NULL);
816 static gsize WINAPI start_wrapper(void *data)
818 volatile gsize dummy;
820 /* Avoid scanning the frames above this frame during a GC */
821 mono_gc_set_stack_end ((void*)&dummy);
823 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
829 * Common thread creation code.
830 * LOCKING: Acquires the threads lock.
833 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
834 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
836 StartInfo *start_info = NULL;
837 HANDLE thread_handle;
838 MonoNativeThreadId tid;
843 g_assert (!start_func && !start_func_arg);
845 g_assert (!start_delegate);
848 * Join joinable threads to prevent running out of threads since the finalizer
849 * thread might be blocked/backlogged.
851 mono_threads_join_threads ();
853 mono_error_init (error);
855 mono_threads_lock ();
857 mono_threads_unlock ();
860 if (threads_starting_up == NULL) {
861 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
862 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
864 mono_g_hash_table_insert (threads_starting_up, thread, thread);
865 mono_threads_unlock ();
867 internal->threadpool_thread = threadpool_thread;
868 if (threadpool_thread)
869 mono_thread_set_state (internal, ThreadState_Background);
871 start_info = g_new0 (StartInfo, 1);
873 start_info->thread = thread;
874 start_info->start_delegate = start_delegate;
875 start_info->start_delegate_arg = thread->start_obj;
876 start_info->start_func = start_func;
877 start_info->start_func_arg = start_func_arg;
878 start_info->failed = FALSE;
879 mono_coop_sem_init (&start_info->registered, 0);
882 stack_size = default_stacksize_for_thread (internal);
884 tp.priority = thread->priority;
885 tp.stack_size = stack_size;
886 tp.creation_flags = 0;
888 thread_handle = mono_threads_create_thread (start_wrapper, start_info, &tp, &tid);
890 if (thread_handle == NULL) {
891 /* The thread couldn't be created, so set an exception */
892 mono_threads_lock ();
893 mono_g_hash_table_remove (threads_starting_up, thread);
894 mono_threads_unlock ();
895 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
896 /* ref is not going to be decremented in start_wrapper_internal */
897 InterlockedDecrement (&start_info->ref);
902 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
905 * Wait for the thread to set up its TLS data etc, so
906 * theres no potential race condition if someone tries
907 * to look up the data believing the thread has
911 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
913 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));
915 ret = !start_info->failed;
918 if (InterlockedDecrement (&start_info->ref) == 0) {
919 mono_coop_sem_destroy (&start_info->registered);
926 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
928 if (mono_thread_start_cb) {
929 mono_thread_start_cb (tid, stack_start, func);
933 void mono_threads_set_default_stacksize (guint32 stacksize)
935 default_stacksize = stacksize;
938 guint32 mono_threads_get_default_stacksize (void)
940 return default_stacksize;
944 * mono_thread_create_internal:
946 * ARG should not be a GC reference.
949 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
952 MonoInternalThread *internal;
955 mono_error_init (error);
957 thread = create_thread_object (domain);
958 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
960 internal = create_internal_thread ();
962 MONO_OBJECT_SETREF (thread, internal_thread, internal);
964 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
965 return_val_if_nok (error, NULL);
967 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
968 #ifndef MONO_CROSS_COMPILE
969 if (mono_check_corlib_version () == NULL)
970 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
977 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
980 if (!mono_thread_create_checked (domain, func, arg, &error))
981 mono_error_cleanup (&error);
985 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
987 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
991 mono_thread_attach (MonoDomain *domain)
993 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
999 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1001 MonoInternalThread *internal;
1003 MonoNativeThreadId tid;
1006 if ((internal = mono_thread_internal_current ())) {
1007 if (domain != mono_domain_get ())
1008 mono_domain_set (domain, TRUE);
1009 /* Already attached */
1010 return mono_thread_current ();
1013 if (!mono_gc_register_thread (&domain)) {
1014 g_error ("Thread %"G_GSIZE_FORMAT" calling into managed code is not registered with the GC. On UNIX, this can be fixed by #include-ing <gc.h> before <pthread.h> in the file containing the thread creation code.", mono_native_thread_id_get ());
1017 tid=mono_native_thread_id_get ();
1019 internal = create_internal_thread ();
1021 thread = new_thread_with_internal (domain, internal);
1023 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
1024 /* Mono is shutting down, so just wait for the end */
1026 mono_thread_info_sleep (10000, NULL);
1029 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1031 if (mono_thread_attach_cb) {
1035 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1038 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1040 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1043 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1044 if (!mono_thread_info_current ()->tools_thread)
1045 // FIXME: Need a separate callback
1046 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1052 mono_thread_detach_internal (MonoInternalThread *thread)
1054 g_return_if_fail (thread != NULL);
1056 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1058 thread_cleanup (thread);
1060 SET_CURRENT_OBJECT (NULL);
1061 mono_domain_unset ();
1063 /* Don't need to close the handle to this thread, even though we took a
1064 * reference in mono_thread_attach (), because the GC will do it
1065 * when the Thread object is finalised.
1070 mono_thread_detach (MonoThread *thread)
1073 mono_thread_detach_internal (thread->internal_thread);
1077 * mono_thread_detach_if_exiting:
1079 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1080 * This should be used at the end of embedding code which calls into managed code, and which
1081 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1084 mono_thread_detach_if_exiting (void)
1086 if (mono_thread_info_is_exiting ()) {
1087 MonoInternalThread *thread;
1089 thread = mono_thread_internal_current ();
1091 mono_thread_detach_internal (thread);
1092 mono_thread_info_detach ();
1100 mono_thread_exit (void)
1102 MonoInternalThread *thread = mono_thread_internal_current ();
1104 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1106 thread_cleanup (thread);
1107 SET_CURRENT_OBJECT (NULL);
1108 mono_domain_unset ();
1110 /* we could add a callback here for embedders to use. */
1111 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1112 exit (mono_environment_exitcode_get ());
1113 mono_thread_info_exit ();
1117 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1119 MonoInternalThread *internal;
1121 internal = create_internal_thread ();
1123 internal->state = ThreadState_Unstarted;
1125 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1129 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1133 MonoInternalThread *internal;
1136 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1138 if (!this_obj->internal_thread)
1139 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1140 internal = this_obj->internal_thread;
1142 LOCK_THREAD (internal);
1144 if ((internal->state & ThreadState_Unstarted) == 0) {
1145 UNLOCK_THREAD (internal);
1146 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1150 if ((internal->state & ThreadState_Aborted) != 0) {
1151 UNLOCK_THREAD (internal);
1155 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1157 mono_error_cleanup (&error);
1158 UNLOCK_THREAD (internal);
1162 internal->state &= ~ThreadState_Unstarted;
1164 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1166 UNLOCK_THREAD (internal);
1167 return internal->handle;
1171 * This is called from the finalizer of the internal thread object.
1174 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1176 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1179 * Since threads keep a reference to their thread object while running, by the time this function is called,
1180 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1181 * when thread_cleanup () can be called after this.
1184 mono_threads_close_thread_handle (thread);
1186 if (this_obj->synch_cs) {
1187 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1188 this_obj->synch_cs = NULL;
1189 mono_coop_mutex_destroy (synch_cs);
1193 if (this_obj->name) {
1194 void *name = this_obj->name;
1195 this_obj->name = NULL;
1201 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1204 MonoInternalThread *thread = mono_thread_internal_current ();
1206 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1208 if (mono_thread_current_check_pending_interrupt ())
1212 gboolean alerted = FALSE;
1214 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1216 res = mono_thread_info_sleep (ms, &alerted);
1218 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1221 MonoException* exc = mono_thread_execute_interruption ();
1223 mono_raise_exception (exc);
1235 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1240 ves_icall_System_Threading_Thread_GetDomainID (void)
1242 return mono_domain_get()->domain_id;
1246 ves_icall_System_Threading_Thread_Yield (void)
1248 return mono_thread_info_yield ();
1252 * mono_thread_get_name:
1254 * Return the name of the thread. NAME_LEN is set to the length of the name.
1255 * Return NULL if the thread has no name. The returned memory is owned by the
1259 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1263 LOCK_THREAD (this_obj);
1265 if (!this_obj->name) {
1269 *name_len = this_obj->name_len;
1270 res = g_new (gunichar2, this_obj->name_len);
1271 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1274 UNLOCK_THREAD (this_obj);
1280 * mono_thread_get_name_utf8:
1282 * Return the name of the thread in UTF-8.
1283 * Return NULL if the thread has no name.
1284 * The returned memory is owned by the caller.
1287 mono_thread_get_name_utf8 (MonoThread *thread)
1292 MonoInternalThread *internal = thread->internal_thread;
1293 if (internal == NULL)
1296 LOCK_THREAD (internal);
1298 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1300 UNLOCK_THREAD (internal);
1306 * mono_thread_get_managed_id:
1308 * Return the Thread.ManagedThreadId value of `thread`.
1309 * Returns -1 if `thread` is NULL.
1312 mono_thread_get_managed_id (MonoThread *thread)
1317 MonoInternalThread *internal = thread->internal_thread;
1318 if (internal == NULL)
1321 int32_t id = internal->managed_id;
1327 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1332 mono_error_init (&error);
1334 LOCK_THREAD (this_obj);
1336 if (!this_obj->name)
1339 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1341 UNLOCK_THREAD (this_obj);
1343 if (mono_error_set_pending_exception (&error))
1350 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1352 LOCK_THREAD (this_obj);
1354 mono_error_init (error);
1356 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1357 UNLOCK_THREAD (this_obj);
1359 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1362 if (this_obj->name) {
1363 g_free (this_obj->name);
1364 this_obj->name_len = 0;
1367 this_obj->name = g_new (gunichar2, mono_string_length (name));
1368 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1369 this_obj->name_len = mono_string_length (name);
1372 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1375 this_obj->name = NULL;
1378 UNLOCK_THREAD (this_obj);
1380 if (this_obj->name && this_obj->tid) {
1381 char *tname = mono_string_to_utf8_checked (name, error);
1382 return_if_nok (error);
1383 mono_profiler_thread_name (this_obj->tid, tname);
1384 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1390 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1393 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1394 mono_error_set_pending_exception (&error);
1398 * ves_icall_System_Threading_Thread_GetPriority_internal:
1399 * @param this_obj: The MonoInternalThread on which to operate.
1401 * Gets the priority of the given thread.
1402 * @return: The priority of the given thread.
1405 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1408 MonoInternalThread *internal = this_obj->internal_thread;
1410 LOCK_THREAD (internal);
1411 if (internal->handle != NULL)
1412 priority = mono_thread_info_get_priority ((MonoThreadInfo*) internal->thread_info);
1414 priority = this_obj->priority;
1415 UNLOCK_THREAD (internal);
1420 * ves_icall_System_Threading_Thread_SetPriority_internal:
1421 * @param this_obj: The MonoInternalThread on which to operate.
1422 * @param priority: The priority to set.
1424 * Sets the priority of the given thread.
1427 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1429 MonoInternalThread *internal = this_obj->internal_thread;
1431 LOCK_THREAD (internal);
1432 this_obj->priority = priority;
1433 if (internal->handle != NULL)
1434 mono_thread_info_set_priority ((MonoThreadInfo*) internal->thread_info, this_obj->priority);
1435 UNLOCK_THREAD (internal);
1438 /* If the array is already in the requested domain, we just return it,
1439 otherwise we return a copy in that domain. */
1441 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1445 mono_error_init (error);
1449 if (mono_object_domain (arr) == domain)
1452 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1453 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1458 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1461 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1462 mono_error_set_pending_exception (&error);
1467 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1470 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1471 mono_error_set_pending_exception (&error);
1476 mono_thread_current (void)
1478 MonoDomain *domain = mono_domain_get ();
1479 MonoInternalThread *internal = mono_thread_internal_current ();
1480 MonoThread **current_thread_ptr;
1482 g_assert (internal);
1483 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1485 if (!*current_thread_ptr) {
1486 g_assert (domain != mono_get_root_domain ());
1487 *current_thread_ptr = new_thread_with_internal (domain, internal);
1489 return *current_thread_ptr;
1492 /* Return the thread object belonging to INTERNAL in the current domain */
1494 mono_thread_current_for_thread (MonoInternalThread *internal)
1496 MonoDomain *domain = mono_domain_get ();
1497 MonoThread **current_thread_ptr;
1499 g_assert (internal);
1500 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1502 if (!*current_thread_ptr) {
1503 g_assert (domain != mono_get_root_domain ());
1504 *current_thread_ptr = new_thread_with_internal (domain, internal);
1506 return *current_thread_ptr;
1510 mono_thread_internal_current (void)
1512 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1513 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1518 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1520 MonoInternalThread *thread = this_obj->internal_thread;
1521 HANDLE handle = thread->handle;
1522 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1525 if (mono_thread_current_check_pending_interrupt ())
1528 LOCK_THREAD (thread);
1530 if ((thread->state & ThreadState_Unstarted) != 0) {
1531 UNLOCK_THREAD (thread);
1533 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1537 UNLOCK_THREAD (thread);
1542 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1544 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1547 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1550 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1552 if(ret==WAIT_OBJECT_0) {
1553 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1558 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1563 #define MANAGED_WAIT_FAILED 0x7fffffff
1566 map_native_wait_result_to_managed (gint32 val)
1568 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1569 return val == WAIT_FAILED ? MANAGED_WAIT_FAILED : val;
1573 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1581 mono_error_init (error);
1583 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1586 if (numhandles != 1)
1587 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE);
1589 ret = WaitForSingleObjectEx (handles [0], ms, TRUE);
1592 if (ret != WAIT_IO_COMPLETION)
1595 exc = mono_thread_execute_interruption ();
1597 mono_error_set_exception_instance (error, exc);
1604 /* Re-calculate ms according to the time passed */
1605 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1606 if (diff_ms >= ms) {
1610 wait = ms - diff_ms;
1616 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1623 MonoObject *waitHandle;
1624 MonoInternalThread *thread = mono_thread_internal_current ();
1626 /* Do this WaitSleepJoin check before creating objects */
1627 if (mono_thread_current_check_pending_interrupt ())
1628 return map_native_wait_result_to_managed (WAIT_FAILED);
1630 /* We fail in managed if the array has more than 64 elements */
1631 numhandles = (guint32)mono_array_length(mono_handles);
1632 handles = g_new0(HANDLE, numhandles);
1634 for(i = 0; i < numhandles; i++) {
1635 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1636 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1643 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1645 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1647 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1651 mono_error_set_pending_exception (&error);
1653 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1654 return map_native_wait_result_to_managed (ret);
1657 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1660 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1661 uintptr_t numhandles;
1664 MonoObject *waitHandle;
1665 MonoInternalThread *thread = mono_thread_internal_current ();
1667 /* Do this WaitSleepJoin check before creating objects */
1668 if (mono_thread_current_check_pending_interrupt ())
1669 return map_native_wait_result_to_managed (WAIT_FAILED);
1671 numhandles = mono_array_length(mono_handles);
1672 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1673 return map_native_wait_result_to_managed (WAIT_FAILED);
1675 for(i = 0; i < numhandles; i++) {
1676 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1677 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1684 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1686 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1688 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1690 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1692 mono_error_set_pending_exception (&error);
1694 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1696 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1697 return map_native_wait_result_to_managed (ret - WAIT_OBJECT_0);
1699 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1700 return map_native_wait_result_to_managed (ret - WAIT_ABANDONED_0);
1703 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1704 return map_native_wait_result_to_managed (ret);
1708 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1712 MonoInternalThread *thread = mono_thread_internal_current ();
1714 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1720 if (mono_thread_current_check_pending_interrupt ())
1721 return map_native_wait_result_to_managed (WAIT_FAILED);
1723 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1725 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1727 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1729 mono_error_set_pending_exception (&error);
1730 return map_native_wait_result_to_managed (ret);
1734 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1737 MonoInternalThread *thread = mono_thread_internal_current ();
1742 if (mono_thread_current_check_pending_interrupt ())
1743 return map_native_wait_result_to_managed (WAIT_FAILED);
1745 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1748 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1751 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1753 return map_native_wait_result_to_managed (ret);
1756 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1763 mutex = CreateMutex (NULL, owned, NULL);
1765 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1767 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1775 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1776 return(ReleaseMutex (handle));
1779 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1785 *error = ERROR_SUCCESS;
1787 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1789 *error = GetLastError ();
1796 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, gint32 *error)
1801 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1803 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1804 mono_string_chars (name));
1807 *error = GetLastError ();
1812 MonoBoolean ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, gint32 *prevcount)
1814 return ReleaseSemaphore (handle, releaseCount, prevcount);
1817 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1821 sem = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1823 *error = GetLastError ();
1828 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, gint32 *error)
1833 event = CreateEvent (NULL, manual, initial, NULL);
1835 event = CreateEvent (NULL, manual, initial,
1836 mono_string_chars (name));
1839 *error = GetLastError ();
1844 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1845 return (SetEvent(handle));
1848 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1849 return (ResetEvent(handle));
1853 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1854 CloseHandle (handle);
1857 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1863 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1865 *error = GetLastError ();
1867 *error = ERROR_SUCCESS;
1873 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1875 return InterlockedIncrement (location);
1878 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1880 #if SIZEOF_VOID_P == 4
1881 if (G_UNLIKELY ((size_t)location & 0x7)) {
1883 mono_interlocked_lock ();
1886 mono_interlocked_unlock ();
1890 return InterlockedIncrement64 (location);
1893 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1895 return InterlockedDecrement(location);
1898 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1900 #if SIZEOF_VOID_P == 4
1901 if (G_UNLIKELY ((size_t)location & 0x7)) {
1903 mono_interlocked_lock ();
1906 mono_interlocked_unlock ();
1910 return InterlockedDecrement64 (location);
1913 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1915 return InterlockedExchange(location, value);
1918 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1921 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1922 mono_gc_wbarrier_generic_nostore (location);
1926 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1928 return InterlockedExchangePointer(location, value);
1931 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1933 IntFloatUnion val, ret;
1936 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1942 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1944 #if SIZEOF_VOID_P == 4
1945 if (G_UNLIKELY ((size_t)location & 0x7)) {
1947 mono_interlocked_lock ();
1950 mono_interlocked_unlock ();
1954 return InterlockedExchange64 (location, value);
1958 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1960 LongDoubleUnion val, ret;
1963 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1968 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1970 return InterlockedCompareExchange(location, value, comparand);
1973 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1975 gint32 r = InterlockedCompareExchange(location, value, comparand);
1976 *success = r == comparand;
1980 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1983 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1984 mono_gc_wbarrier_generic_nostore (location);
1988 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1990 return InterlockedCompareExchangePointer(location, value, comparand);
1993 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1995 IntFloatUnion val, ret, cmp;
1998 cmp.fval = comparand;
1999 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2005 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2007 #if SIZEOF_VOID_P == 8
2008 LongDoubleUnion val, comp, ret;
2011 comp.fval = comparand;
2012 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2018 mono_interlocked_lock ();
2020 if (old == comparand)
2022 mono_interlocked_unlock ();
2029 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2031 #if SIZEOF_VOID_P == 4
2032 if (G_UNLIKELY ((size_t)location & 0x7)) {
2034 mono_interlocked_lock ();
2036 if (old == comparand)
2038 mono_interlocked_unlock ();
2042 return InterlockedCompareExchange64 (location, value, comparand);
2046 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2049 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2050 mono_gc_wbarrier_generic_nostore (location);
2055 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2058 MONO_CHECK_NULL (location, NULL);
2059 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2060 mono_gc_wbarrier_generic_nostore (location);
2065 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2067 return InterlockedAdd (location, value);
2071 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2073 #if SIZEOF_VOID_P == 4
2074 if (G_UNLIKELY ((size_t)location & 0x7)) {
2076 mono_interlocked_lock ();
2079 mono_interlocked_unlock ();
2083 return InterlockedAdd64 (location, value);
2087 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2089 #if SIZEOF_VOID_P == 4
2090 if (G_UNLIKELY ((size_t)location & 0x7)) {
2092 mono_interlocked_lock ();
2094 mono_interlocked_unlock ();
2098 return InterlockedRead64 (location);
2102 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2104 mono_memory_barrier ();
2108 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2110 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2112 if (state & ThreadState_Background) {
2113 /* If the thread changes the background mode, the main thread has to
2114 * be notified, since it has to rebuild the list of threads to
2117 SetEvent (background_change_event);
2122 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2124 mono_thread_set_state (this_obj, (MonoThreadState)state);
2126 if (state & ThreadState_Background) {
2127 /* If the thread changes the background mode, the main thread has to
2128 * be notified, since it has to rebuild the list of threads to
2131 SetEvent (background_change_event);
2136 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2140 LOCK_THREAD (this_obj);
2142 state = this_obj->state;
2144 UNLOCK_THREAD (this_obj);
2149 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2151 MonoInternalThread *current;
2153 MonoInternalThread *thread = this_obj->internal_thread;
2155 LOCK_THREAD (thread);
2157 current = mono_thread_internal_current ();
2159 thread->thread_interrupt_requested = TRUE;
2160 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2162 UNLOCK_THREAD (thread);
2165 async_abort_internal (thread, FALSE);
2170 * mono_thread_current_check_pending_interrupt:
2172 * Checks if there's a interruption request and set the pending exception if so.
2174 * @returns true if a pending exception was set
2177 mono_thread_current_check_pending_interrupt (void)
2179 MonoInternalThread *thread = mono_thread_internal_current ();
2180 gboolean throw_ = FALSE;
2182 LOCK_THREAD (thread);
2184 if (thread->thread_interrupt_requested) {
2186 thread->thread_interrupt_requested = FALSE;
2189 UNLOCK_THREAD (thread);
2192 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2197 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2199 LOCK_THREAD (thread);
2201 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2202 (thread->state & ThreadState_StopRequested) != 0 ||
2203 (thread->state & ThreadState_Stopped) != 0)
2205 UNLOCK_THREAD (thread);
2209 if ((thread->state & ThreadState_Unstarted) != 0) {
2210 thread->state |= ThreadState_Aborted;
2211 UNLOCK_THREAD (thread);
2215 thread->state |= ThreadState_AbortRequested;
2216 if (thread->abort_state_handle)
2217 mono_gchandle_free (thread->abort_state_handle);
2219 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2220 g_assert (thread->abort_state_handle);
2222 thread->abort_state_handle = 0;
2224 thread->abort_exc = NULL;
2226 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));
2228 /* During shutdown, we can't wait for other threads */
2230 /* Make sure the thread is awake */
2231 mono_thread_resume (thread);
2233 UNLOCK_THREAD (thread);
2238 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2240 if (!request_thread_abort (thread, state))
2243 if (thread == mono_thread_internal_current ()) {
2245 self_abort_internal (&error);
2246 mono_error_set_pending_exception (&error);
2248 async_abort_internal (thread, TRUE);
2253 * mono_thread_internal_abort:
2255 * Request thread @thread to be aborted.
2257 * @thread MUST NOT be the current thread.
2260 mono_thread_internal_abort (MonoInternalThread *thread)
2262 g_assert (thread != mono_thread_internal_current ());
2264 if (!request_thread_abort (thread, NULL))
2266 async_abort_internal (thread, TRUE);
2270 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2272 MonoInternalThread *thread = mono_thread_internal_current ();
2273 gboolean was_aborting;
2275 LOCK_THREAD (thread);
2276 was_aborting = thread->state & ThreadState_AbortRequested;
2277 thread->state &= ~ThreadState_AbortRequested;
2278 UNLOCK_THREAD (thread);
2280 if (!was_aborting) {
2281 const char *msg = "Unable to reset abort because no abort was requested";
2282 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2285 thread->abort_exc = NULL;
2286 if (thread->abort_state_handle) {
2287 mono_gchandle_free (thread->abort_state_handle);
2288 /* This is actually not necessary - the handle
2289 only counts if the exception is set */
2290 thread->abort_state_handle = 0;
2295 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2297 LOCK_THREAD (thread);
2299 thread->state &= ~ThreadState_AbortRequested;
2301 if (thread->abort_exc) {
2302 thread->abort_exc = NULL;
2303 if (thread->abort_state_handle) {
2304 mono_gchandle_free (thread->abort_state_handle);
2305 /* This is actually not necessary - the handle
2306 only counts if the exception is set */
2307 thread->abort_state_handle = 0;
2311 UNLOCK_THREAD (thread);
2315 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2318 MonoInternalThread *thread = this_obj->internal_thread;
2319 MonoObject *state, *deserialized = NULL;
2322 if (!thread->abort_state_handle)
2325 state = mono_gchandle_get_target (thread->abort_state_handle);
2328 domain = mono_domain_get ();
2329 if (mono_object_domain (state) == domain)
2332 deserialized = mono_object_xdomain_representation (state, domain, &error);
2334 if (!deserialized) {
2335 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2336 if (!is_ok (&error)) {
2337 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2338 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2340 mono_set_pending_exception (invalid_op_exc);
2344 return deserialized;
2348 mono_thread_suspend (MonoInternalThread *thread)
2350 LOCK_THREAD (thread);
2352 if ((thread->state & ThreadState_Unstarted) != 0 ||
2353 (thread->state & ThreadState_Aborted) != 0 ||
2354 (thread->state & ThreadState_Stopped) != 0)
2356 UNLOCK_THREAD (thread);
2360 if ((thread->state & ThreadState_Suspended) != 0 ||
2361 (thread->state & ThreadState_SuspendRequested) != 0 ||
2362 (thread->state & ThreadState_StopRequested) != 0)
2364 UNLOCK_THREAD (thread);
2368 thread->state |= ThreadState_SuspendRequested;
2370 if (thread == mono_thread_internal_current ()) {
2371 /* calls UNLOCK_THREAD (thread) */
2372 self_suspend_internal ();
2374 /* calls UNLOCK_THREAD (thread) */
2375 async_suspend_internal (thread, FALSE);
2382 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2384 if (!mono_thread_suspend (this_obj->internal_thread)) {
2385 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2390 /* LOCKING: LOCK_THREAD(thread) must be held */
2392 mono_thread_resume (MonoInternalThread *thread)
2394 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2395 thread->state &= ~ThreadState_SuspendRequested;
2399 if ((thread->state & ThreadState_Suspended) == 0 ||
2400 (thread->state & ThreadState_Unstarted) != 0 ||
2401 (thread->state & ThreadState_Aborted) != 0 ||
2402 (thread->state & ThreadState_Stopped) != 0)
2407 UNLOCK_THREAD (thread);
2409 /* Awake the thread */
2410 if (!mono_thread_info_resume (thread_get_tid (thread)))
2413 LOCK_THREAD (thread);
2415 thread->state &= ~ThreadState_Suspended;
2421 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2423 if (!thread->internal_thread) {
2424 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2426 LOCK_THREAD (thread->internal_thread);
2427 if (!mono_thread_resume (thread->internal_thread))
2428 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2429 UNLOCK_THREAD (thread->internal_thread);
2434 mono_threads_is_critical_method (MonoMethod *method)
2436 switch (method->wrapper_type) {
2437 case MONO_WRAPPER_RUNTIME_INVOKE:
2438 case MONO_WRAPPER_XDOMAIN_INVOKE:
2439 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2446 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2451 if (mono_threads_is_critical_method (m)) {
2452 *((gboolean*)data) = TRUE;
2459 is_running_protected_wrapper (void)
2461 gboolean found = FALSE;
2462 mono_stack_walk (find_wrapper, &found);
2467 request_thread_stop (MonoInternalThread *thread)
2469 LOCK_THREAD (thread);
2471 if ((thread->state & ThreadState_StopRequested) != 0 ||
2472 (thread->state & ThreadState_Stopped) != 0)
2474 UNLOCK_THREAD (thread);
2478 /* Make sure the thread is awake */
2479 mono_thread_resume (thread);
2481 thread->state |= ThreadState_StopRequested;
2482 thread->state &= ~ThreadState_AbortRequested;
2484 UNLOCK_THREAD (thread);
2489 * mono_thread_internal_stop:
2491 * Request thread @thread to stop.
2493 * @thread MUST NOT be the current thread.
2496 mono_thread_internal_stop (MonoInternalThread *thread)
2498 g_assert (thread != mono_thread_internal_current ());
2500 if (!request_thread_stop (thread))
2503 async_abort_internal (thread, TRUE);
2506 void mono_thread_stop (MonoThread *thread)
2508 MonoInternalThread *internal = thread->internal_thread;
2510 if (!request_thread_stop (internal))
2513 if (internal == mono_thread_internal_current ()) {
2515 self_abort_internal (&error);
2517 This function is part of the embeding API and has no way to return the exception
2518 to be thrown. So what we do is keep the old behavior and raise the exception.
2520 mono_error_raise_exception (&error); /* OK to throw, see note */
2522 async_abort_internal (internal, TRUE);
2527 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2529 gint8 tmp = *(volatile gint8 *)ptr;
2530 mono_memory_barrier ();
2535 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2537 gint16 tmp = *(volatile gint16 *)ptr;
2538 mono_memory_barrier ();
2543 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2545 gint32 tmp = *(volatile gint32 *)ptr;
2546 mono_memory_barrier ();
2551 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2553 gint64 tmp = *(volatile gint64 *)ptr;
2554 mono_memory_barrier ();
2559 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2561 volatile void *tmp = *(volatile void **)ptr;
2562 mono_memory_barrier ();
2563 return (void *) tmp;
2567 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2569 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2570 mono_memory_barrier ();
2571 return (MonoObject *) tmp;
2575 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2577 double tmp = *(volatile double *)ptr;
2578 mono_memory_barrier ();
2583 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2585 float tmp = *(volatile float *)ptr;
2586 mono_memory_barrier ();
2591 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2593 return InterlockedRead8 ((volatile gint8 *)ptr);
2597 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2599 return InterlockedRead16 ((volatile gint16 *)ptr);
2603 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2605 return InterlockedRead ((volatile gint32 *)ptr);
2609 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2611 #if SIZEOF_VOID_P == 4
2612 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2614 mono_interlocked_lock ();
2615 val = *(gint64*)ptr;
2616 mono_interlocked_unlock ();
2620 return InterlockedRead64 ((volatile gint64 *)ptr);
2624 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2626 return InterlockedReadPointer ((volatile gpointer *)ptr);
2630 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2634 #if SIZEOF_VOID_P == 4
2635 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2637 mono_interlocked_lock ();
2638 val = *(double*)ptr;
2639 mono_interlocked_unlock ();
2644 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2650 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2654 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2660 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2662 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2666 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2668 mono_memory_barrier ();
2669 *(volatile gint8 *)ptr = value;
2673 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2675 mono_memory_barrier ();
2676 *(volatile gint16 *)ptr = value;
2680 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2682 mono_memory_barrier ();
2683 *(volatile gint32 *)ptr = value;
2687 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2689 mono_memory_barrier ();
2690 *(volatile gint64 *)ptr = value;
2694 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2696 mono_memory_barrier ();
2697 *(volatile void **)ptr = value;
2701 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2703 mono_memory_barrier ();
2704 mono_gc_wbarrier_generic_store (ptr, value);
2708 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2710 mono_memory_barrier ();
2711 *(volatile double *)ptr = value;
2715 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2717 mono_memory_barrier ();
2718 *(volatile float *)ptr = value;
2722 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2724 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2728 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2730 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2734 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2736 InterlockedWrite ((volatile gint32 *)ptr, value);
2740 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2742 #if SIZEOF_VOID_P == 4
2743 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2744 mono_interlocked_lock ();
2745 *(gint64*)ptr = value;
2746 mono_interlocked_unlock ();
2751 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2755 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2757 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2761 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2765 #if SIZEOF_VOID_P == 4
2766 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2767 mono_interlocked_lock ();
2768 *(double*)ptr = value;
2769 mono_interlocked_unlock ();
2776 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2780 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2786 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2790 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2792 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2796 free_context (void *user_data)
2798 ContextStaticData *data = user_data;
2800 mono_threads_lock ();
2803 * There is no guarantee that, by the point this reference queue callback
2804 * has been invoked, the GC handle associated with the object will fail to
2805 * resolve as one might expect. So if we don't free and remove the GC
2806 * handle here, free_context_static_data_helper () could end up resolving
2807 * a GC handle to an actually-dead context which would contain a pointer
2808 * to an already-freed static data segment, resulting in a crash when
2811 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2813 mono_threads_unlock ();
2815 mono_gchandle_free (data->gc_handle);
2816 mono_free_static_data (data->static_data);
2821 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2823 mono_threads_lock ();
2825 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2828 contexts = g_hash_table_new (NULL, NULL);
2831 context_queue = mono_gc_reference_queue_new (free_context);
2833 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2834 g_hash_table_insert (contexts, gch, gch);
2837 * We use this intermediate structure to contain a duplicate pointer to
2838 * the static data because we can't rely on being able to resolve the GC
2839 * handle in the reference queue callback.
2841 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2842 data->gc_handle = GPOINTER_TO_UINT (gch);
2845 context_adjust_static_data (ctx);
2846 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2848 mono_threads_unlock ();
2850 mono_profiler_context_loaded (ctx);
2854 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2857 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2858 * cleanup in exceptional circumstances, we don't actually do any
2859 * cleanup work here. We instead do this via a reference queue.
2862 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2864 mono_profiler_context_unloaded (ctx);
2868 mono_thread_init_tls (void)
2870 MONO_FAST_TLS_INIT (tls_current_object);
2871 mono_native_tls_alloc (¤t_object_key, NULL);
2874 void mono_thread_init (MonoThreadStartCB start_cb,
2875 MonoThreadAttachCB attach_cb)
2877 mono_coop_mutex_init_recursive (&threads_mutex);
2879 mono_os_mutex_init_recursive(&interlocked_mutex);
2880 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2882 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2883 g_assert(background_change_event != NULL);
2885 mono_init_static_data_info (&thread_static_info);
2886 mono_init_static_data_info (&context_static_info);
2888 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2890 mono_thread_start_cb = start_cb;
2891 mono_thread_attach_cb = attach_cb;
2893 /* Get a pseudo handle to the current process. This is just a
2894 * kludge so that wapi can build a process handle if needed.
2895 * As a pseudo handle is returned, we don't need to clean
2898 GetCurrentProcess ();
2901 void mono_thread_cleanup (void)
2903 #if !defined(RUN_IN_SUBTHREAD)
2904 /* The main thread must abandon any held mutexes (particularly
2905 * important for named mutexes as they are shared across
2906 * processes, see bug 74680.) This will happen when the
2907 * thread exits, but if it's not running in a subthread it
2908 * won't exit in time.
2910 mono_thread_info_set_exited (mono_thread_info_current ());
2914 /* This stuff needs more testing, it seems one of these
2915 * critical sections can be locked when mono_thread_cleanup is
2918 mono_coop_mutex_destroy (&threads_mutex);
2919 mono_os_mutex_destroy (&interlocked_mutex);
2920 mono_os_mutex_destroy (&delayed_free_table_mutex);
2921 mono_os_mutex_destroy (&small_id_mutex);
2922 CloseHandle (background_change_event);
2925 mono_native_tls_free (current_object_key);
2929 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2931 mono_thread_cleanup_fn = func;
2935 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2937 thread->internal_thread->manage_callback = func;
2941 static void print_tids (gpointer key, gpointer value, gpointer user)
2943 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2944 * sizeof(uint) and a cast to uint would overflow
2946 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2947 * print this as a pointer.
2949 g_message ("Waiting for: %p", key);
2954 HANDLE handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2955 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2960 wait_for_tids (struct wait_data *wait, guint32 timeout)
2964 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2967 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2970 if(ret==WAIT_FAILED) {
2971 /* See the comment in build_wait_tids() */
2972 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2976 for(i=0; i<wait->num; i++)
2977 mono_threads_close_thread_handle (wait->handles [i]);
2979 if (ret == WAIT_TIMEOUT)
2982 for(i=0; i<wait->num; i++) {
2983 gsize tid = wait->threads[i]->tid;
2986 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2987 * it can still run io-layer etc. code. So wait for it to really exit.
2988 * FIXME: This won't join threads which are not in the joinable_hash yet.
2990 mono_thread_join ((gpointer)tid);
2992 mono_threads_lock ();
2993 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2994 /* This thread must have been killed, because
2995 * it hasn't cleaned itself up. (It's just
2996 * possible that the thread exited before the
2997 * parent thread had a chance to store the
2998 * handle, and now there is another pointer to
2999 * the already-exited thread stored. In this
3000 * case, we'll just get two
3001 * mono_profiler_thread_end() calls for the
3005 mono_threads_unlock ();
3006 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
3007 thread_cleanup (wait->threads[i]);
3009 mono_threads_unlock ();
3014 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
3016 guint32 i, ret, count;
3018 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3020 /* Add the thread state change event, so it wakes up if a thread changes
3021 * to background mode.
3024 if (count < MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3025 wait->handles [count] = background_change_event;
3030 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
3033 if(ret==WAIT_FAILED) {
3034 /* See the comment in build_wait_tids() */
3035 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3039 for(i=0; i<wait->num; i++)
3040 mono_threads_close_thread_handle (wait->handles [i]);
3042 if (ret == WAIT_TIMEOUT)
3045 if (ret < wait->num) {
3046 gsize tid = wait->threads[ret]->tid;
3047 mono_threads_lock ();
3048 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3049 /* See comment in wait_for_tids about thread cleanup */
3050 mono_threads_unlock ();
3051 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
3052 thread_cleanup (wait->threads [ret]);
3054 mono_threads_unlock ();
3058 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3060 struct wait_data *wait=(struct wait_data *)user;
3062 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3064 MonoInternalThread *thread=(MonoInternalThread *)value;
3066 /* Ignore background threads, we abort them later */
3067 /* Do not lock here since it is not needed and the caller holds threads_lock */
3068 if (thread->state & ThreadState_Background) {
3069 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3070 return; /* just leave, ignore */
3073 if (mono_gc_is_finalizer_internal_thread (thread)) {
3074 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3078 if (thread == mono_thread_internal_current ()) {
3079 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3083 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3084 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3088 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3089 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3093 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3094 if (handle == NULL) {
3095 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3099 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3100 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3101 wait->handles[wait->num]=handle;
3102 wait->threads[wait->num]=thread;
3105 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3107 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3112 /* Just ignore the rest, we can't do anything with
3119 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3121 struct wait_data *wait=(struct wait_data *)user;
3122 MonoNativeThreadId self = mono_native_thread_id_get ();
3123 MonoInternalThread *thread = (MonoInternalThread *)value;
3126 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3129 /* The finalizer thread is not a background thread */
3130 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3131 && (thread->state & ThreadState_Background) != 0
3132 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3134 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3138 wait->handles[wait->num] = handle;
3139 wait->threads[wait->num] = thread;
3142 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3143 mono_thread_internal_abort (thread);
3147 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3148 && !mono_gc_is_finalizer_internal_thread (thread);
3152 * mono_threads_set_shutting_down:
3154 * Is called by a thread that wants to shut down Mono. If the runtime is already
3155 * shutting down, the calling thread is suspended/stopped, and this function never
3159 mono_threads_set_shutting_down (void)
3161 MonoInternalThread *current_thread = mono_thread_internal_current ();
3163 mono_threads_lock ();
3165 if (shutting_down) {
3166 mono_threads_unlock ();
3168 /* Make sure we're properly suspended/stopped */
3170 LOCK_THREAD (current_thread);
3172 if ((current_thread->state & ThreadState_SuspendRequested) ||
3173 (current_thread->state & ThreadState_AbortRequested) ||
3174 (current_thread->state & ThreadState_StopRequested)) {
3175 UNLOCK_THREAD (current_thread);
3176 mono_thread_execute_interruption ();
3178 current_thread->state |= ThreadState_Stopped;
3179 UNLOCK_THREAD (current_thread);
3182 /*since we're killing the thread, unset the current domain.*/
3183 mono_domain_unset ();
3185 /* Wake up other threads potentially waiting for us */
3186 mono_thread_info_exit ();
3188 shutting_down = TRUE;
3190 /* Not really a background state change, but this will
3191 * interrupt the main thread if it is waiting for all
3192 * the other threads.
3194 SetEvent (background_change_event);
3196 mono_threads_unlock ();
3200 void mono_thread_manage (void)
3202 struct wait_data wait_data;
3203 struct wait_data *wait = &wait_data;
3205 memset (wait, 0, sizeof (struct wait_data));
3206 /* join each thread that's still running */
3207 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3209 mono_threads_lock ();
3211 THREAD_DEBUG (g_message("%s: No threads", __func__));
3212 mono_threads_unlock ();
3215 mono_threads_unlock ();
3218 mono_threads_lock ();
3219 if (shutting_down) {
3220 /* somebody else is shutting down */
3221 mono_threads_unlock ();
3224 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3225 mono_g_hash_table_foreach (threads, print_tids, NULL));
3227 ResetEvent (background_change_event);
3229 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3230 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3231 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3232 mono_threads_unlock ();
3234 /* Something to wait for */
3235 wait_for_tids_or_state_change (wait, INFINITE);
3237 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3238 } while(wait->num>0);
3240 /* Mono is shutting down, so just wait for the end */
3241 if (!mono_runtime_try_shutdown ()) {
3242 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3243 mono_thread_suspend (mono_thread_internal_current ());
3244 mono_thread_execute_interruption ();
3248 * Remove everything but the finalizer thread and self.
3249 * Also abort all the background threads
3252 mono_threads_lock ();
3255 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3256 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3257 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3259 mono_threads_unlock ();
3261 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3263 /* Something to wait for */
3264 wait_for_tids (wait, INFINITE);
3266 } while (wait->num > 0);
3269 * give the subthreads a chance to really quit (this is mainly needed
3270 * to get correct user and system times from getrusage/wait/time(1)).
3271 * This could be removed if we avoid pthread_detach() and use pthread_join().
3273 mono_thread_info_yield ();
3277 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3279 MonoInternalThread *thread = (MonoInternalThread*)value;
3280 struct wait_data *wait = (struct wait_data*)user_data;
3284 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3286 * This needs no locking.
3288 if ((thread->state & ThreadState_Suspended) != 0 ||
3289 (thread->state & ThreadState_Stopped) != 0)
3292 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3293 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3297 wait->handles [wait->num] = handle;
3298 wait->threads [wait->num] = thread;
3304 * mono_thread_suspend_all_other_threads:
3306 * Suspend all managed threads except the finalizer thread and this thread. It is
3307 * not possible to resume them later.
3309 void mono_thread_suspend_all_other_threads (void)
3311 struct wait_data wait_data;
3312 struct wait_data *wait = &wait_data;
3314 MonoNativeThreadId self = mono_native_thread_id_get ();
3315 guint32 eventidx = 0;
3316 gboolean starting, finished;
3318 memset (wait, 0, sizeof (struct wait_data));
3320 * The other threads could be in an arbitrary state at this point, i.e.
3321 * they could be starting up, shutting down etc. This means that there could be
3322 * threads which are not even in the threads hash table yet.
3326 * First we set a barrier which will be checked by all threads before they
3327 * are added to the threads hash table, and they will exit if the flag is set.
3328 * This ensures that no threads could be added to the hash later.
3329 * We will use shutting_down as the barrier for now.
3331 g_assert (shutting_down);
3334 * We make multiple calls to WaitForMultipleObjects since:
3335 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3336 * - some threads could exit without becoming suspended
3341 * Make a copy of the hashtable since we can't do anything with
3342 * threads while threads_mutex is held.
3345 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3346 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3347 mono_threads_lock ();
3348 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3349 mono_threads_unlock ();
3352 /* Get the suspended events that we'll be waiting for */
3353 for (i = 0; i < wait->num; ++i) {
3354 MonoInternalThread *thread = wait->threads [i];
3356 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3357 || mono_gc_is_finalizer_internal_thread (thread)
3358 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3360 //mono_threads_close_thread_handle (wait->handles [i]);
3361 wait->threads [i] = NULL; /* ignore this thread in next loop */
3365 LOCK_THREAD (thread);
3367 if ((thread->state & ThreadState_Suspended) != 0 ||
3368 (thread->state & ThreadState_StopRequested) != 0 ||
3369 (thread->state & ThreadState_Stopped) != 0) {
3370 UNLOCK_THREAD (thread);
3371 mono_threads_close_thread_handle (wait->handles [i]);
3372 wait->threads [i] = NULL; /* ignore this thread in next loop */
3378 /* Convert abort requests into suspend requests */
3379 if ((thread->state & ThreadState_AbortRequested) != 0)
3380 thread->state &= ~ThreadState_AbortRequested;
3382 thread->state |= ThreadState_SuspendRequested;
3384 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3385 async_suspend_internal (thread, TRUE);
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_info_describe (info, 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;
3588 mono_error_init (error);
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 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3824 data->wait.handles [data->wait.num] = handle;
3825 data->wait.threads [data->wait.num] = thread;
3828 /* Just ignore the rest, we can't do anything with
3836 * mono_threads_abort_appdomain_threads:
3838 * Abort threads which has references to the given appdomain.
3841 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3843 #ifdef __native_client__
3847 abort_appdomain_data user_data;
3849 int orig_timeout = timeout;
3852 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3854 start_time = mono_msec_ticks ();
3856 mono_threads_lock ();
3858 user_data.domain = domain;
3859 user_data.wait.num = 0;
3860 /* This shouldn't take any locks */
3861 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3862 mono_threads_unlock ();
3864 if (user_data.wait.num > 0) {
3865 /* Abort the threads outside the threads lock */
3866 for (i = 0; i < user_data.wait.num; ++i)
3867 mono_thread_internal_abort (user_data.wait.threads [i]);
3870 * We should wait for the threads either to abort, or to leave the
3871 * domain. We can't do the latter, so we wait with a timeout.
3873 wait_for_tids (&user_data.wait, 100);
3876 /* Update remaining time */
3877 timeout -= mono_msec_ticks () - start_time;
3878 start_time = mono_msec_ticks ();
3880 if (orig_timeout != -1 && timeout < 0)
3883 while (user_data.wait.num > 0);
3885 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3891 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3893 MonoInternalThread *thread = (MonoInternalThread*)value;
3894 MonoDomain *domain = (MonoDomain*)user_data;
3897 /* No locking needed here */
3898 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3900 if (thread->cached_culture_info) {
3901 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3902 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3903 if (obj && obj->vtable->domain == domain)
3904 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3910 * mono_threads_clear_cached_culture:
3912 * Clear the cached_current_culture from all threads if it is in the
3916 mono_threads_clear_cached_culture (MonoDomain *domain)
3918 mono_threads_lock ();
3919 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3920 mono_threads_unlock ();
3924 * mono_thread_get_undeniable_exception:
3926 * Return an exception which needs to be raised when leaving a catch clause.
3927 * This is used for undeniable exception propagation.
3930 mono_thread_get_undeniable_exception (void)
3932 MonoInternalThread *thread = mono_thread_internal_current ();
3934 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3936 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3937 * exception if the thread no longer references a dying appdomain.
3939 thread->abort_exc->trace_ips = NULL;
3940 thread->abort_exc->stack_trace = NULL;
3941 return thread->abort_exc;
3947 #if MONO_SMALL_CONFIG
3948 #define NUM_STATIC_DATA_IDX 4
3949 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3953 #define NUM_STATIC_DATA_IDX 8
3954 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3955 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3959 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3960 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3963 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3965 gpointer *static_data = (gpointer *)addr;
3967 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3968 void **ptr = (void **)static_data [i];
3973 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3974 void **p = ptr + idx;
3977 mark_func ((MonoObject**)p, gc_data);
3983 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3985 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3989 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3991 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3995 * mono_alloc_static_data
3997 * Allocate memory blocks for storing threads or context static data
4000 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4002 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4005 gpointer* static_data = *static_data_ptr;
4007 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4008 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4010 if (mono_gc_user_markers_supported ()) {
4011 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4012 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4014 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4015 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4018 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4019 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4020 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4021 *static_data_ptr = static_data;
4022 static_data [0] = static_data;
4025 for (i = 1; i <= idx; ++i) {
4026 if (static_data [i])
4029 if (mono_gc_user_markers_supported ())
4030 static_data [i] = g_malloc0 (static_data_size [i]);
4032 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4033 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4034 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4039 mono_free_static_data (gpointer* static_data)
4042 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4043 gpointer p = static_data [i];
4047 * At this point, the static data pointer array is still registered with the
4048 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4049 * data. Freeing the individual arrays without first nulling their slots
4050 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4051 * such an already freed array. See bug #13813.
4053 static_data [i] = NULL;
4054 mono_memory_write_barrier ();
4055 if (mono_gc_user_markers_supported ())
4058 mono_gc_free_fixed (p);
4060 mono_gc_free_fixed (static_data);
4064 * mono_init_static_data_info
4066 * Initializes static data counters
4068 static void mono_init_static_data_info (StaticDataInfo *static_data)
4070 static_data->idx = 0;
4071 static_data->offset = 0;
4072 static_data->freelist = NULL;
4076 * mono_alloc_static_data_slot
4078 * Generates an offset for static data. static_data contains the counters
4079 * used to generate it.
4082 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4084 if (!static_data->idx && !static_data->offset) {
4086 * we use the first chunk of the first allocation also as
4087 * an array for the rest of the data
4089 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4091 static_data->offset += align - 1;
4092 static_data->offset &= ~(align - 1);
4093 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4094 static_data->idx ++;
4095 g_assert (size <= static_data_size [static_data->idx]);
4096 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4097 static_data->offset = 0;
4099 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4100 static_data->offset += size;
4105 * LOCKING: requires that threads_mutex is held
4108 context_adjust_static_data (MonoAppContext *ctx)
4110 if (context_static_info.offset || context_static_info.idx > 0) {
4111 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4112 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4113 ctx->data->static_data = ctx->static_data;
4118 * LOCKING: requires that threads_mutex is held
4121 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4123 MonoInternalThread *thread = (MonoInternalThread *)value;
4124 guint32 offset = GPOINTER_TO_UINT (user);
4126 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4130 * LOCKING: requires that threads_mutex is held
4133 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4135 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4140 guint32 offset = GPOINTER_TO_UINT (user);
4141 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4142 ctx->data->static_data = ctx->static_data;
4145 static StaticDataFreeList*
4146 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4148 StaticDataFreeList* prev = NULL;
4149 StaticDataFreeList* tmp = static_data->freelist;
4151 if (tmp->size == size) {
4153 prev->next = tmp->next;
4155 static_data->freelist = tmp->next;
4164 #if SIZEOF_VOID_P == 4
4171 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4173 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4175 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4176 MonoBitSet *rb = sets [idx];
4177 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4178 offset /= sizeof (uintptr_t);
4179 /* offset is now the bitmap offset */
4180 for (int i = 0; i < numbits; ++i) {
4181 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4182 mono_bitset_set_fast (rb, offset + i);
4187 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4189 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4190 MonoBitSet *rb = sets [idx];
4191 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4192 offset /= sizeof (uintptr_t);
4193 /* offset is now the bitmap offset */
4194 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4195 mono_bitset_clear_fast (rb, offset + i);
4199 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4201 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4203 StaticDataInfo *info;
4206 if (static_type == SPECIAL_STATIC_THREAD) {
4207 info = &thread_static_info;
4208 sets = thread_reference_bitmaps;
4210 info = &context_static_info;
4211 sets = context_reference_bitmaps;
4214 mono_threads_lock ();
4216 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4220 offset = item->offset;
4223 offset = mono_alloc_static_data_slot (info, size, align);
4226 update_reference_bitmap (sets, offset, bitmap, numbits);
4228 if (static_type == SPECIAL_STATIC_THREAD) {
4229 /* This can be called during startup */
4230 if (threads != NULL)
4231 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4233 if (contexts != NULL)
4234 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4236 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4239 mono_threads_unlock ();
4245 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4247 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4249 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4250 return get_thread_static_data (thread, offset);
4252 return get_context_static_data (thread->current_appcontext, offset);
4257 mono_get_special_static_data (guint32 offset)
4259 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4268 * LOCKING: requires that threads_mutex is held
4271 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4273 MonoInternalThread *thread = (MonoInternalThread *)value;
4274 OffsetSize *data = (OffsetSize *)user;
4275 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4276 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4279 if (!thread->static_data || !thread->static_data [idx])
4281 ptr = ((char*) thread->static_data [idx]) + off;
4282 mono_gc_bzero_atomic (ptr, data->size);
4286 * LOCKING: requires that threads_mutex is held
4289 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4291 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4296 OffsetSize *data = (OffsetSize *)user;
4297 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4298 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4301 if (!ctx->static_data || !ctx->static_data [idx])
4304 ptr = ((char*) ctx->static_data [idx]) + off;
4305 mono_gc_bzero_atomic (ptr, data->size);
4309 do_free_special_slot (guint32 offset, guint32 size)
4311 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4313 StaticDataInfo *info;
4315 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4316 info = &thread_static_info;
4317 sets = thread_reference_bitmaps;
4319 info = &context_static_info;
4320 sets = context_reference_bitmaps;
4323 guint32 data_offset = offset;
4324 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4325 OffsetSize data = { data_offset, size };
4327 clear_reference_bitmap (sets, data.offset, data.size);
4329 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4330 if (threads != NULL)
4331 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4333 if (contexts != NULL)
4334 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4337 if (!mono_runtime_is_shutting_down ()) {
4338 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4340 item->offset = offset;
4343 item->next = info->freelist;
4344 info->freelist = item;
4349 do_free_special (gpointer key, gpointer value, gpointer data)
4351 MonoClassField *field = (MonoClassField *)key;
4352 guint32 offset = GPOINTER_TO_UINT (value);
4355 size = mono_type_size (field->type, &align);
4356 do_free_special_slot (offset, size);
4360 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4362 mono_threads_lock ();
4364 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4366 mono_threads_unlock ();
4370 static void CALLBACK dummy_apc (ULONG_PTR param)
4376 * mono_thread_execute_interruption
4378 * Performs the operation that the requested thread state requires (abort,
4381 static MonoException*
4382 mono_thread_execute_interruption (void)
4384 MonoInternalThread *thread = mono_thread_internal_current ();
4385 MonoThread *sys_thread = mono_thread_current ();
4387 LOCK_THREAD (thread);
4389 /* MonoThread::interruption_requested can only be changed with atomics */
4390 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4391 /* this will consume pending APC calls */
4393 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4395 InterlockedDecrement (&thread_interruption_requested);
4397 /* Clear the interrupted flag of the thread so it can wait again */
4398 mono_thread_info_clear_self_interrupt ();
4401 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4402 if (sys_thread->pending_exception) {
4405 exc = sys_thread->pending_exception;
4406 sys_thread->pending_exception = NULL;
4408 UNLOCK_THREAD (thread);
4410 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4411 UNLOCK_THREAD (thread);
4412 g_assert (sys_thread->pending_exception == NULL);
4413 if (thread->abort_exc == NULL) {
4415 * This might be racy, but it has to be called outside the lock
4416 * since it calls managed code.
4418 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4420 return thread->abort_exc;
4422 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4423 /* calls UNLOCK_THREAD (thread) */
4424 self_suspend_internal ();
4427 else if ((thread->state & ThreadState_StopRequested) != 0) {
4428 /* FIXME: do this through the JIT? */
4430 UNLOCK_THREAD (thread);
4432 mono_thread_exit ();
4434 } else if (thread->thread_interrupt_requested) {
4436 thread->thread_interrupt_requested = FALSE;
4437 UNLOCK_THREAD (thread);
4439 return(mono_get_exception_thread_interrupted ());
4442 UNLOCK_THREAD (thread);
4448 * mono_thread_request_interruption
4450 * A signal handler can call this method to request the interruption of a
4451 * thread. The result of the interruption will depend on the current state of
4452 * the thread. If the result is an exception that needs to be throw, it is
4453 * provided as return value.
4456 mono_thread_request_interruption (gboolean running_managed)
4458 MonoInternalThread *thread = mono_thread_internal_current ();
4460 /* The thread may already be stopping */
4465 if (thread->interrupt_on_stop &&
4466 thread->state & ThreadState_StopRequested &&
4467 thread->state & ThreadState_Background)
4470 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4472 InterlockedIncrement (&thread_interruption_requested);
4474 if (!running_managed || is_running_protected_wrapper ()) {
4475 /* Can't stop while in unmanaged code. Increase the global interruption
4476 request count. When exiting the unmanaged method the count will be
4477 checked and the thread will be interrupted. */
4479 /* this will awake the thread if it is in WaitForSingleObject
4481 /* Our implementation of this function ignores the func argument */
4483 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4485 mono_thread_info_self_interrupt ();
4490 return mono_thread_execute_interruption ();
4494 /*This function should be called by a thread after it has exited all of
4495 * its handle blocks at interruption time.*/
4497 mono_thread_resume_interruption (void)
4499 MonoInternalThread *thread = mono_thread_internal_current ();
4500 gboolean still_aborting;
4502 /* The thread may already be stopping */
4506 LOCK_THREAD (thread);
4507 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4508 UNLOCK_THREAD (thread);
4510 /*This can happen if the protected block called Thread::ResetAbort*/
4511 if (!still_aborting)
4514 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4516 InterlockedIncrement (&thread_interruption_requested);
4518 mono_thread_info_self_interrupt ();
4520 return mono_thread_execute_interruption ();
4523 gboolean mono_thread_interruption_requested ()
4525 if (thread_interruption_requested) {
4526 MonoInternalThread *thread = mono_thread_internal_current ();
4527 /* The thread may already be stopping */
4529 return (thread->interruption_requested);
4534 static MonoException*
4535 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4537 MonoInternalThread *thread = mono_thread_internal_current ();
4539 /* The thread may already be stopping */
4543 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4544 MonoException* exc = mono_thread_execute_interruption ();
4552 * Performs the interruption of the current thread, if one has been requested,
4553 * and the thread is not running a protected wrapper.
4554 * Return the exception which needs to be thrown, if any.
4557 mono_thread_interruption_checkpoint (void)
4559 return mono_thread_interruption_checkpoint_request (FALSE);
4563 * Performs the interruption of the current thread, if one has been requested.
4564 * Return the exception which needs to be thrown, if any.
4567 mono_thread_force_interruption_checkpoint_noraise (void)
4569 return mono_thread_interruption_checkpoint_request (TRUE);
4573 * mono_set_pending_exception:
4575 * Set the pending exception of the current thread to EXC.
4576 * The exception will be thrown when execution returns to managed code.
4579 mono_set_pending_exception (MonoException *exc)
4581 MonoThread *thread = mono_thread_current ();
4583 /* The thread may already be stopping */
4587 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4589 mono_thread_request_interruption (FALSE);
4593 * mono_thread_interruption_request_flag:
4595 * Returns the address of a flag that will be non-zero if an interruption has
4596 * been requested for a thread. The thread to interrupt may not be the current
4597 * thread, so an additional call to mono_thread_interruption_requested() or
4598 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4601 gint32* mono_thread_interruption_request_flag ()
4603 return &thread_interruption_requested;
4607 mono_thread_init_apartment_state (void)
4610 MonoInternalThread* thread = mono_thread_internal_current ();
4612 /* Positive return value indicates success, either
4613 * S_OK if this is first CoInitialize call, or
4614 * S_FALSE if CoInitialize already called, but with same
4615 * threading model. A negative value indicates failure,
4616 * probably due to trying to change the threading model.
4618 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4619 ? COINIT_APARTMENTTHREADED
4620 : COINIT_MULTITHREADED) < 0) {
4621 thread->apartment_state = ThreadApartmentState_Unknown;
4627 mono_thread_cleanup_apartment_state (void)
4630 MonoInternalThread* thread = mono_thread_internal_current ();
4632 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4639 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4641 LOCK_THREAD (thread);
4642 thread->state |= state;
4643 UNLOCK_THREAD (thread);
4647 * mono_thread_test_and_set_state:
4649 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4651 * Returns TRUE is @set was OR'd in.
4654 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4656 LOCK_THREAD (thread);
4658 if ((thread->state & test) != 0) {
4659 UNLOCK_THREAD (thread);
4663 thread->state |= set;
4664 UNLOCK_THREAD (thread);
4670 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4672 LOCK_THREAD (thread);
4673 thread->state &= ~state;
4674 UNLOCK_THREAD (thread);
4678 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4680 gboolean ret = FALSE;
4682 LOCK_THREAD (thread);
4684 if ((thread->state & test) != 0) {
4688 UNLOCK_THREAD (thread);
4693 static gboolean has_tls_get = FALSE;
4696 mono_runtime_set_has_tls_get (gboolean val)
4702 mono_runtime_has_tls_get (void)
4708 self_interrupt_thread (void *_unused)
4710 MonoThreadInfo *info = mono_thread_info_current ();
4711 MonoException *exc = mono_thread_execute_interruption ();
4712 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4713 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. */
4714 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4718 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4722 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4726 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4728 MonoJitInfo **dest = (MonoJitInfo **)data;
4734 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4736 MonoJitInfo *ji = NULL;
4741 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4742 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4743 * where we hold runtime locks.
4745 if (!mono_threads_is_coop_enabled ())
4746 mono_thread_info_set_is_async_context (TRUE);
4747 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4748 if (!mono_threads_is_coop_enabled ())
4749 mono_thread_info_set_is_async_context (FALSE);
4754 MonoInternalThread *thread;
4755 gboolean install_async_abort;
4756 MonoThreadInfoInterruptToken *interrupt_token;
4759 static SuspendThreadResult
4760 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4762 AbortThreadData *data = (AbortThreadData *)ud;
4763 MonoInternalThread *thread = data->thread;
4764 MonoJitInfo *ji = NULL;
4765 gboolean protected_wrapper;
4766 gboolean running_managed;
4768 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4769 return MonoResumeThread;
4772 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4773 The protected block code will give them a chance when appropriate.
4775 if (thread->abort_protected_block_count)
4776 return MonoResumeThread;
4778 /*someone is already interrupting it*/
4779 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4780 return MonoResumeThread;
4782 InterlockedIncrement (&thread_interruption_requested);
4784 ji = mono_thread_info_get_last_managed (info);
4785 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4786 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4788 if (!protected_wrapper && running_managed) {
4789 /*We are in managed code*/
4790 /*Set the thread to call */
4791 if (data->install_async_abort)
4792 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4793 return MonoResumeThread;
4796 * This will cause waits to be broken.
4797 * It will also prevent the thread from entering a wait, so if the thread returns
4798 * from the wait before it receives the abort signal, it will just spin in the wait
4799 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4802 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4804 return MonoResumeThread;
4809 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4811 AbortThreadData data;
4813 g_assert (thread != mono_thread_internal_current ());
4815 data.thread = thread;
4816 data.install_async_abort = install_async_abort;
4817 data.interrupt_token = NULL;
4819 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4820 if (data.interrupt_token)
4821 mono_thread_info_finish_interrupt (data.interrupt_token);
4822 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4826 self_abort_internal (MonoError *error)
4830 mono_error_init (error);
4832 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4833 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4836 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.
4838 exc = mono_thread_request_interruption (TRUE);
4840 mono_error_set_exception_instance (error, exc);
4842 mono_thread_info_self_interrupt ();
4846 MonoInternalThread *thread;
4848 MonoThreadInfoInterruptToken *interrupt_token;
4849 } SuspendThreadData;
4851 static SuspendThreadResult
4852 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4854 SuspendThreadData *data = (SuspendThreadData *)ud;
4855 MonoInternalThread *thread = data->thread;
4856 MonoJitInfo *ji = NULL;
4857 gboolean protected_wrapper;
4858 gboolean running_managed;
4860 ji = mono_thread_info_get_last_managed (info);
4861 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4862 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4864 if (running_managed && !protected_wrapper) {
4865 thread->state &= ~ThreadState_SuspendRequested;
4866 thread->state |= ThreadState_Suspended;
4867 return KeepSuspended;
4869 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4870 InterlockedIncrement (&thread_interruption_requested);
4871 if (data->interrupt)
4872 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4874 return MonoResumeThread;
4878 /* LOCKING: called with @thread synch_cs held, and releases it */
4880 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4882 SuspendThreadData data;
4884 g_assert (thread != mono_thread_internal_current ());
4886 data.thread = thread;
4887 data.interrupt = interrupt;
4888 data.interrupt_token = NULL;
4890 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4891 if (data.interrupt_token)
4892 mono_thread_info_finish_interrupt (data.interrupt_token);
4894 UNLOCK_THREAD (thread);
4897 /* LOCKING: called with @thread synch_cs held, and releases it */
4899 self_suspend_internal (void)
4901 MonoInternalThread *thread;
4903 thread = mono_thread_internal_current ();
4905 mono_thread_info_begin_self_suspend ();
4906 thread->state &= ~ThreadState_SuspendRequested;
4907 thread->state |= ThreadState_Suspended;
4909 UNLOCK_THREAD (thread);
4911 mono_thread_info_end_self_suspend ();
4915 * mono_thread_is_foreign:
4916 * @thread: the thread to query
4918 * This function allows one to determine if a thread was created by the mono runtime and has
4919 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4921 * Returns: TRUE if @thread was not created by the runtime.
4924 mono_thread_is_foreign (MonoThread *thread)
4926 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4927 return info->runtime_thread == FALSE;
4931 * mono_add_joinable_thread:
4933 * Add TID to the list of joinable threads.
4934 * LOCKING: Acquires the threads lock.
4937 mono_threads_add_joinable_thread (gpointer tid)
4941 * We cannot detach from threads because it causes problems like
4942 * 2fd16f60/r114307. So we collect them and join them when
4943 * we have time (in he finalizer thread).
4945 joinable_threads_lock ();
4946 if (!joinable_threads)
4947 joinable_threads = g_hash_table_new (NULL, NULL);
4948 g_hash_table_insert (joinable_threads, tid, tid);
4949 joinable_thread_count ++;
4950 joinable_threads_unlock ();
4952 mono_gc_finalize_notify ();
4957 * mono_threads_join_threads:
4959 * Join all joinable threads. This is called from the finalizer thread.
4960 * LOCKING: Acquires the threads lock.
4963 mono_threads_join_threads (void)
4966 GHashTableIter iter;
4973 if (!joinable_thread_count)
4977 joinable_threads_lock ();
4979 if (g_hash_table_size (joinable_threads)) {
4980 g_hash_table_iter_init (&iter, joinable_threads);
4981 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4982 thread = (pthread_t)tid;
4983 g_hash_table_remove (joinable_threads, key);
4984 joinable_thread_count --;
4987 joinable_threads_unlock ();
4989 if (thread != pthread_self ()) {
4991 /* This shouldn't block */
4992 pthread_join (thread, NULL);
5005 * Wait for thread TID to exit.
5006 * LOCKING: Acquires the threads lock.
5009 mono_thread_join (gpointer tid)
5013 gboolean found = FALSE;
5015 joinable_threads_lock ();
5016 if (!joinable_threads)
5017 joinable_threads = g_hash_table_new (NULL, NULL);
5018 if (g_hash_table_lookup (joinable_threads, tid)) {
5019 g_hash_table_remove (joinable_threads, tid);
5020 joinable_thread_count --;
5023 joinable_threads_unlock ();
5026 thread = (pthread_t)tid;
5028 pthread_join (thread, NULL);
5034 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5036 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5037 mono_thread_interruption_checkpoint ();
5041 mono_thread_internal_unhandled_exception (MonoObject* exc)
5043 MonoClass *klass = exc->vtable->klass;
5044 if (is_threadabort_exception (klass)) {
5045 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5046 } else if (!is_appdomainunloaded_exception (klass)
5047 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5048 mono_unhandled_exception (exc);
5049 if (mono_environment_exitcode_get () == 1) {
5050 mono_environment_exitcode_set (255);
5051 mono_invoke_unhandled_exception_hook (exc);
5052 g_assert_not_reached ();
5058 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5061 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5062 mono_error_set_pending_exception (&error);
5066 * mono_threads_attach_coop: called by native->managed wrappers
5070 * - @return: the original domain which needs to be restored, or NULL.
5073 * - @dummy: contains the original domain
5074 * - @return: a cookie containing current MonoThreadInfo*.
5077 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5080 gboolean fresh_thread = FALSE;
5083 /* Happens when called from AOTed code which is only used in the root domain. */
5084 domain = mono_get_root_domain ();
5089 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5090 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5091 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5092 * we're only responsible for making the cookie. */
5093 if (mono_threads_is_coop_enabled ()) {
5094 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5095 fresh_thread = !info || !mono_thread_info_is_live (info);
5098 if (!mono_thread_internal_current ()) {
5099 mono_thread_attach_full (domain, FALSE);
5102 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5105 orig = mono_domain_get ();
5107 mono_domain_set (domain, TRUE);
5109 if (!mono_threads_is_coop_enabled ())
5110 return orig != domain ? orig : NULL;
5114 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5115 * return the right cookie. */
5116 return mono_threads_enter_gc_unsafe_region_cookie ();
5119 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5120 return mono_threads_enter_gc_unsafe_region (dummy);
5125 * mono_threads_detach_coop: called by native->managed wrappers
5128 * - @cookie: the original domain which needs to be restored, or NULL.
5132 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5133 * - @dummy: contains the original domain
5136 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5138 MonoDomain *domain, *orig;
5140 if (!mono_threads_is_coop_enabled ()) {
5141 orig = (MonoDomain*) cookie;
5143 mono_domain_set (orig, TRUE);
5145 orig = (MonoDomain*) *dummy;
5147 domain = mono_domain_get ();
5150 /* it won't do anything if cookie is NULL
5151 * thread state RUNNING -> (RUNNING|BLOCKING) */
5152 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5154 if (orig != domain) {
5156 mono_domain_unset ();
5158 mono_domain_set (orig, TRUE);
5164 mono_threads_begin_abort_protected_block (void)
5166 MonoInternalThread *thread;
5168 thread = mono_thread_internal_current ();
5169 ++thread->abort_protected_block_count;
5170 mono_memory_barrier ();
5174 mono_threads_end_abort_protected_block (void)
5176 MonoInternalThread *thread;
5178 thread = mono_thread_internal_current ();
5180 mono_memory_barrier ();
5181 --thread->abort_protected_block_count;
5185 mono_thread_try_resume_interruption (void)
5187 MonoInternalThread *thread;
5189 thread = mono_thread_internal_current ();
5190 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5193 return mono_thread_resume_interruption ();