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)
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/threadpool.h>
25 #include <mono/metadata/threads-types.h>
26 #include <mono/metadata/exception.h>
27 #include <mono/metadata/environment.h>
28 #include <mono/metadata/monitor.h>
29 #include <mono/metadata/gc-internal.h>
30 #include <mono/metadata/marshal.h>
31 #include <mono/metadata/runtime.h>
32 #include <mono/io-layer/io-layer.h>
34 #include <mono/io-layer/threads.h>
36 #include <mono/metadata/object-internals.h>
37 #include <mono/metadata/mono-debug-debugger.h>
38 #include <mono/utils/mono-compiler.h>
39 #include <mono/utils/mono-mmap.h>
40 #include <mono/utils/mono-membar.h>
41 #include <mono/utils/mono-time.h>
42 #include <mono/utils/mono-threads.h>
43 #include <mono/utils/hazard-pointer.h>
44 #include <mono/utils/mono-tls.h>
45 #include <mono/utils/atomic.h>
46 #include <mono/utils/mono-memory-model.h>
48 #include <mono/metadata/gc-internal.h>
50 #ifdef PLATFORM_ANDROID
53 extern int tkill (pid_t tid, int signal);
56 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
57 #define THREAD_DEBUG(a)
58 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
59 #define THREAD_WAIT_DEBUG(a)
60 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
61 #define LIBGC_DEBUG(a)
63 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
64 #define SPIN_LOCK(i) do { \
65 if (SPIN_TRYLOCK (i)) \
69 #define SPIN_UNLOCK(i) i = 0
71 #define LOCK_THREAD(thread) lock_thread((thread))
72 #define UNLOCK_THREAD(thread) unlock_thread((thread))
74 /* Provide this for systems with glib < 2.6 */
75 #ifndef G_GSIZE_FORMAT
76 # if GLIB_SIZEOF_LONG == 8
77 # define G_GSIZE_FORMAT "lu"
79 # define G_GSIZE_FORMAT "u"
85 guint32 (*func)(void *);
101 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
102 struct _MonoThreadDomainTls {
103 MonoThreadDomainTls *next;
111 MonoThreadDomainTls *freelist;
114 /* Number of cached culture objects in the MonoThread->cached_culture_info array
115 * (per-type): we use the first NUM entries for CultureInfo and the last for
116 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
118 #define NUM_CACHED_CULTURES 4
119 #define CULTURES_START_IDX 0
120 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
122 /* Controls access to the 'threads' hash table */
123 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
124 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
125 static CRITICAL_SECTION threads_mutex;
127 /* Controls access to context static data */
128 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
129 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
130 static CRITICAL_SECTION contexts_mutex;
132 /* Controls access to the 'joinable_threads' hash table */
133 #define joinable_threads_lock() EnterCriticalSection (&joinable_threads_mutex)
134 #define joinable_threads_unlock() LeaveCriticalSection (&joinable_threads_mutex)
135 static CRITICAL_SECTION joinable_threads_mutex;
137 /* Holds current status of static data heap */
138 static StaticDataInfo thread_static_info;
139 static StaticDataInfo context_static_info;
141 /* The hash of existing threads (key is thread ID, value is
142 * MonoInternalThread*) that need joining before exit
144 static MonoGHashTable *threads=NULL;
147 * Threads which are starting up and they are not in the 'threads' hash yet.
148 * When handle_store is called for a thread, it will be removed from this hash table.
149 * Protected by mono_threads_lock ().
151 static MonoGHashTable *threads_starting_up = NULL;
153 /* Maps a MonoThread to its start argument */
154 /* Protected by mono_threads_lock () */
155 static MonoGHashTable *thread_start_args = NULL;
157 /* The TLS key that holds the MonoObject assigned to each thread */
158 static MonoNativeTlsKey current_object_key;
161 /* Protected by the threads lock */
162 static GHashTable *joinable_threads;
163 static int joinable_thread_count;
165 #ifdef MONO_HAVE_FAST_TLS
166 /* we need to use both the Tls* functions and __thread because
167 * the gc needs to see all the threads
169 MONO_FAST_TLS_DECLARE(tls_current_object);
170 #define SET_CURRENT_OBJECT(x) do { \
171 MONO_FAST_TLS_SET (tls_current_object, x); \
172 mono_native_tls_set_value (current_object_key, x); \
174 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
176 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
177 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
180 /* function called at thread start */
181 static MonoThreadStartCB mono_thread_start_cb = NULL;
183 /* function called at thread attach */
184 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
186 /* function called at thread cleanup */
187 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
189 /* function called to notify the runtime about a pending exception on the current thread */
190 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
192 /* The default stack size for each thread */
193 static guint32 default_stacksize = 0;
194 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
196 static void thread_adjust_static_data (MonoInternalThread *thread);
197 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
198 static void mono_init_static_data_info (StaticDataInfo *static_data);
199 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
200 static gboolean mono_thread_resume (MonoInternalThread* thread);
201 static void signal_thread_state_change (MonoInternalThread *thread);
202 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
203 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
204 static void self_suspend_internal (MonoInternalThread *thread);
205 static gboolean resume_thread_internal (MonoInternalThread *thread);
207 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
208 static void ref_stack_destroy (gpointer rs);
210 /* Spin lock for InterlockedXXX 64 bit functions */
211 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
212 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
213 static CRITICAL_SECTION interlocked_mutex;
215 /* global count of thread interruptions requested */
216 static gint32 thread_interruption_requested = 0;
218 /* Event signaled when a thread changes its background mode */
219 static HANDLE background_change_event;
221 static gboolean shutting_down = FALSE;
223 static gint32 managed_thread_id_counter = 0;
226 get_next_managed_thread_id (void)
228 return InterlockedIncrement (&managed_thread_id_counter);
232 mono_thread_get_tls_key (void)
234 return current_object_key;
238 mono_thread_get_tls_offset (void)
241 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
245 static inline MonoNativeThreadId
246 thread_get_tid (MonoInternalThread *thread)
248 /* We store the tid as a guint64 to keep the object layout constant between platforms */
249 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
252 /* handle_store() and handle_remove() manage the array of threads that
253 * still need to be waited for when the main thread exits.
255 * If handle_store() returns FALSE the thread must not be started
256 * because Mono is shutting down.
258 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
260 mono_threads_lock ();
262 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
264 if (threads_starting_up)
265 mono_g_hash_table_remove (threads_starting_up, thread);
267 if (shutting_down && !force_attach) {
268 mono_threads_unlock ();
273 MONO_GC_REGISTER_ROOT_FIXED (threads);
274 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
277 /* We don't need to duplicate thread->handle, because it is
278 * only closed when the thread object is finalized by the GC.
280 g_assert (thread->internal_thread);
281 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
282 thread->internal_thread);
284 mono_threads_unlock ();
289 static gboolean handle_remove(MonoInternalThread *thread)
292 gsize tid = thread->tid;
294 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
296 mono_threads_lock ();
299 /* We have to check whether the thread object for the
300 * tid is still the same in the table because the
301 * thread might have been destroyed and the tid reused
302 * in the meantime, in which case the tid would be in
303 * the table, but with another thread object.
305 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
306 mono_g_hash_table_remove (threads, (gpointer)tid);
315 mono_threads_unlock ();
317 /* Don't close the handle here, wait for the object finalizer
318 * to do it. Otherwise, the following race condition applies:
320 * 1) Thread exits (and handle_remove() closes the handle)
322 * 2) Some other handle is reassigned the same slot
324 * 3) Another thread tries to join the first thread, and
325 * blocks waiting for the reassigned handle to be signalled
326 * (which might never happen). This is possible, because the
327 * thread calling Join() still has a reference to the first
333 static void ensure_synch_cs_set (MonoInternalThread *thread)
335 CRITICAL_SECTION *synch_cs;
337 if (thread->synch_cs != NULL) {
341 synch_cs = g_new0 (CRITICAL_SECTION, 1);
342 InitializeCriticalSection (synch_cs);
344 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
345 synch_cs, NULL) != NULL) {
346 /* Another thread must have installed this CS */
347 DeleteCriticalSection (synch_cs);
353 lock_thread (MonoInternalThread *thread)
355 if (!thread->synch_cs)
356 ensure_synch_cs_set (thread);
358 g_assert (thread->synch_cs);
359 EnterCriticalSection (thread->synch_cs);
363 unlock_thread (MonoInternalThread *thread)
365 LeaveCriticalSection (thread->synch_cs);
369 * NOTE: this function can be called also for threads different from the current one:
370 * make sure no code called from it will ever assume it is run on the thread that is
371 * getting cleaned up.
373 static void thread_cleanup (MonoInternalThread *thread)
375 g_assert (thread != NULL);
377 if (thread->abort_state_handle) {
378 mono_gchandle_free (thread->abort_state_handle);
379 thread->abort_state_handle = 0;
381 thread->abort_exc = NULL;
382 thread->current_appcontext = NULL;
385 * This is necessary because otherwise we might have
386 * cross-domain references which will not get cleaned up when
387 * the target domain is unloaded.
389 if (thread->cached_culture_info) {
391 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
392 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
396 * thread->synch_cs can be NULL if this was called after
397 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
398 * This can happen only during shutdown.
399 * The shutting_down flag is not always set, so we can't assert on it.
401 if (thread->synch_cs)
402 LOCK_THREAD (thread);
404 thread->state |= ThreadState_Stopped;
405 thread->state &= ~ThreadState_Background;
407 if (thread->synch_cs)
408 UNLOCK_THREAD (thread);
411 An interruption request has leaked to cleanup. Adjust the global counter.
413 This can happen is the abort source thread finds the abortee (this) thread
414 in unmanaged code. If this thread never trips back to managed code or check
415 the local flag it will be left set and positively unbalance the global counter.
417 Leaving the counter unbalanced will cause a performance degradation since all threads
418 will now keep checking their local flags all the time.
420 if (InterlockedExchange (&thread->interruption_requested, 0))
421 InterlockedDecrement (&thread_interruption_requested);
423 /* if the thread is not in the hash it has been removed already */
424 if (!handle_remove (thread)) {
425 if (thread == mono_thread_internal_current ()) {
426 mono_domain_unset ();
427 mono_memory_barrier ();
429 /* This needs to be called even if handle_remove () fails */
430 if (mono_thread_cleanup_fn)
431 mono_thread_cleanup_fn (thread);
434 mono_release_type_locks (thread);
436 mono_profiler_thread_end (thread->tid);
438 if (thread == mono_thread_internal_current ()) {
440 * This will signal async signal handlers that the thread has exited.
441 * The profiler callback needs this to be set, so it cannot be done earlier.
443 mono_domain_unset ();
444 mono_memory_barrier ();
447 if (thread == mono_thread_internal_current ())
448 mono_thread_pop_appdomain_ref ();
450 thread->cached_culture_info = NULL;
452 mono_free_static_data (thread->static_data, TRUE);
453 thread->static_data = NULL;
454 ref_stack_destroy (thread->appdomain_refs);
455 thread->appdomain_refs = NULL;
457 if (mono_thread_cleanup_fn)
458 mono_thread_cleanup_fn (thread);
460 if (mono_gc_is_moving ()) {
461 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
462 thread->thread_pinning_ref = NULL;
467 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
470 g_assert ((offset & 0x80000000) == 0);
471 offset &= 0x7fffffff;
472 idx = (offset >> 24) - 1;
473 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
477 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
479 static MonoClassField *current_thread_field = NULL;
483 if (!current_thread_field) {
484 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
485 g_assert (current_thread_field);
488 mono_class_vtable (domain, mono_defaults.thread_class);
489 mono_domain_lock (domain);
490 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
491 mono_domain_unlock (domain);
494 return get_thread_static_data (thread, offset);
498 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
500 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
502 g_assert (current->obj.vtable->domain == domain);
504 g_assert (!*current_thread_ptr);
505 *current_thread_ptr = current;
509 create_thread_object (MonoDomain *domain)
511 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
512 return (MonoThread*)mono_gc_alloc_mature (vt);
516 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
518 MonoThread *thread = create_thread_object (domain);
519 MONO_OBJECT_SETREF (thread, internal_thread, internal);
523 static MonoInternalThread*
524 create_internal_thread (void)
526 MonoInternalThread *thread;
529 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
530 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
532 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
533 InitializeCriticalSection (thread->synch_cs);
535 thread->apartment_state = ThreadApartmentState_Unknown;
536 thread->managed_id = get_next_managed_thread_id ();
537 if (mono_gc_is_moving ()) {
538 thread->thread_pinning_ref = thread;
539 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
546 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
548 MonoDomain *domain = mono_get_root_domain ();
550 if (!candidate || candidate->obj.vtable->domain != domain)
551 candidate = new_thread_with_internal (domain, thread);
552 set_current_thread_for_domain (domain, thread, candidate);
553 g_assert (!thread->root_domain_thread);
554 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
557 static guint32 WINAPI start_wrapper_internal(void *data)
559 MonoThreadInfo *info;
560 StartInfo *start_info = (StartInfo *)data;
561 guint32 (*start_func)(void *);
565 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
568 MonoInternalThread *internal = start_info->obj->internal_thread;
569 MonoObject *start_delegate = start_info->delegate;
570 MonoDomain *domain = start_info->obj->obj.vtable->domain;
572 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
574 /* We can be sure start_info->obj->tid and
575 * start_info->obj->handle have been set, because the thread
576 * was created suspended, and these values were set before the
580 info = mono_thread_info_current ();
582 internal->thread_info = info;
587 SET_CURRENT_OBJECT (internal);
589 mono_monitor_init_tls ();
591 /* Every thread references the appdomain which created it */
592 mono_thread_push_appdomain_ref (domain);
594 if (!mono_domain_set (domain, FALSE)) {
595 /* No point in raising an appdomain_unloaded exception here */
596 /* FIXME: Cleanup here */
597 mono_thread_pop_appdomain_ref ();
601 start_func = start_info->func;
602 start_arg = start_info->start_arg;
604 /* We have to do this here because mono_thread_new_init()
605 requires that root_domain_thread is set up. */
606 thread_adjust_static_data (internal);
607 init_root_domain_thread (internal, start_info->obj);
609 /* This MUST be called before any managed code can be
610 * executed, as it calls the callback function that (for the
611 * jit) sets the lmf marker.
613 mono_thread_new_init (tid, &tid, start_func);
614 internal->stack_ptr = &tid;
616 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
618 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
620 /* On 2.0 profile (and higher), set explicitly since state might have been
622 if (internal->apartment_state == ThreadApartmentState_Unknown)
623 internal->apartment_state = ThreadApartmentState_MTA;
625 mono_thread_init_apartment_state ();
627 if(internal->start_notify!=NULL) {
628 /* Let the thread that called Start() know we're
631 ReleaseSemaphore (internal->start_notify, 1, NULL);
634 mono_threads_lock ();
635 mono_g_hash_table_remove (thread_start_args, start_info->obj);
636 mono_threads_unlock ();
638 mono_thread_set_execution_context (start_info->obj->ec_to_set);
639 start_info->obj->ec_to_set = NULL;
642 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
646 * Call this after calling start_notify, since the profiler callback might want
647 * to lock the thread, and the lock is held by thread_start () which waits for
650 mono_profiler_thread_start (tid);
652 /* if the name was set before starting, we didn't invoke the profiler callback */
653 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
654 char *tname = g_utf16_to_utf8 (internal->name, -1, NULL, NULL, NULL);
655 mono_profiler_thread_name (internal->tid, tname);
658 /* start_func is set only for unmanaged start functions */
660 start_func (start_arg);
663 g_assert (start_delegate != NULL);
664 args [0] = start_arg;
665 /* we may want to handle the exception here. See comment below on unhandled exceptions */
666 mono_runtime_delegate_invoke (start_delegate, args, NULL);
669 /* If the thread calls ExitThread at all, this remaining code
670 * will not be executed, but the main thread will eventually
671 * call thread_cleanup() on this thread's behalf.
674 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
676 /* Do any cleanup needed for apartment state. This
677 * cannot be done in thread_cleanup since thread_cleanup could be
678 * called for a thread other than the current thread.
679 * mono_thread_cleanup_apartment_state cleans up apartment
680 * for the current thead */
681 mono_thread_cleanup_apartment_state ();
683 thread_cleanup (internal);
687 /* Remove the reference to the thread object in the TLS data,
688 * so the thread object can be finalized. This won't be
689 * reached if the thread threw an uncaught exception, so those
690 * thread handles will stay referenced :-( (This is due to
691 * missing support for scanning thread-specific data in the
692 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
695 SET_CURRENT_OBJECT (NULL);
700 static guint32 WINAPI start_wrapper(void *data)
704 /* Avoid scanning the frames above this frame during a GC */
705 mono_gc_set_stack_end ((void*)&dummy);
707 return start_wrapper_internal (data);
713 * Common thread creation code.
714 * LOCKING: Acquires the threads lock.
717 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
718 gboolean throw_on_failure)
720 HANDLE thread_handle;
721 MonoNativeThreadId tid;
722 guint32 create_flags;
725 * Join joinable threads to prevent running out of threads since the finalizer
726 * thread might be blocked/backlogged.
728 mono_threads_join_threads ();
730 mono_threads_lock ();
733 mono_threads_unlock ();
737 * The thread start argument may be an object reference, and there is
738 * no ref to keep it alive when the new thread is started but not yet
739 * registered with the collector. So we store it in a GC tracked hash
742 if (thread_start_args == NULL) {
743 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
744 thread_start_args = mono_g_hash_table_new (NULL, NULL);
746 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
747 if (threads_starting_up == NULL) {
748 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
749 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
751 mono_g_hash_table_insert (threads_starting_up, thread, thread);
752 mono_threads_unlock ();
754 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
755 if (!internal->start_notify) {
756 mono_threads_lock ();
757 mono_g_hash_table_remove (threads_starting_up, thread);
758 mono_threads_unlock ();
759 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
765 stack_size = default_stacksize_for_thread (internal);
767 /* Create suspended, so we can do some housekeeping before the thread
770 create_flags = CREATE_SUSPENDED;
771 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
772 stack_size, create_flags, &tid);
773 if (thread_handle == NULL) {
774 /* The thread couldn't be created, so throw an exception */
775 mono_threads_lock ();
776 mono_g_hash_table_remove (threads_starting_up, thread);
777 mono_threads_unlock ();
779 if (throw_on_failure)
780 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
782 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
785 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
787 internal->handle = thread_handle;
788 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
790 internal->threadpool_thread = threadpool_thread;
791 if (threadpool_thread)
792 mono_thread_set_state (internal, ThreadState_Background);
794 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
796 /* Only store the handle when the thread is about to be
797 * launched, to avoid the main thread deadlocking while trying
798 * to clean up a thread that will never be signalled.
800 if (!handle_store (thread, FALSE))
803 mono_thread_info_resume (tid);
805 if (internal->start_notify) {
807 * Wait for the thread to set up its TLS data etc, so
808 * theres no potential race condition if someone tries
809 * to look up the data believing the thread has
812 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
814 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
815 CloseHandle (internal->start_notify);
816 internal->start_notify = NULL;
819 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
824 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
826 if (mono_thread_start_cb) {
827 mono_thread_start_cb (tid, stack_start, func);
831 void mono_threads_set_default_stacksize (guint32 stacksize)
833 default_stacksize = stacksize;
836 guint32 mono_threads_get_default_stacksize (void)
838 return default_stacksize;
842 * mono_thread_create_internal:
846 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
849 MonoInternalThread *internal;
850 StartInfo *start_info;
853 thread = create_thread_object (domain);
854 internal = create_internal_thread ();
855 MONO_OBJECT_SETREF (thread, internal_thread, internal);
857 start_info = g_new0 (StartInfo, 1);
858 start_info->func = func;
859 start_info->obj = thread;
860 start_info->start_arg = arg;
862 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
866 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
867 if (mono_check_corlib_version () == NULL)
868 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
874 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
876 mono_thread_create_internal (domain, func, arg, FALSE, 0);
880 mono_thread_attach (MonoDomain *domain)
882 return mono_thread_attach_full (domain, FALSE);
886 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
888 MonoThreadInfo *info;
889 MonoInternalThread *thread;
890 MonoThread *current_thread;
891 HANDLE thread_handle;
894 if ((thread = mono_thread_internal_current ())) {
895 if (domain != mono_domain_get ())
896 mono_domain_set (domain, TRUE);
897 /* Already attached */
898 return mono_thread_current ();
901 if (!mono_gc_register_thread (&domain)) {
902 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.", GetCurrentThreadId ());
905 thread = create_internal_thread ();
907 thread_handle = mono_thread_info_open_handle ();
908 g_assert (thread_handle);
910 tid=GetCurrentThreadId ();
912 thread->handle=thread_handle;
914 #ifdef PLATFORM_ANDROID
915 thread->android_tid = (gpointer) gettid ();
917 thread->stack_ptr = &tid;
919 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
921 info = mono_thread_info_current ();
923 thread->thread_info = info;
925 current_thread = new_thread_with_internal (domain, thread);
927 if (!handle_store (current_thread, force_attach)) {
928 /* Mono is shutting down, so just wait for the end */
933 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
935 SET_CURRENT_OBJECT (thread);
936 mono_domain_set (domain, TRUE);
938 mono_monitor_init_tls ();
940 thread_adjust_static_data (thread);
942 init_root_domain_thread (thread, current_thread);
943 if (domain != mono_get_root_domain ())
944 set_current_thread_for_domain (domain, thread, current_thread);
947 if (mono_thread_attach_cb) {
951 mono_thread_info_get_stack_bounds (&staddr, &stsize);
954 mono_thread_attach_cb (tid, &tid);
956 mono_thread_attach_cb (tid, staddr + stsize);
959 // FIXME: Need a separate callback
960 mono_profiler_thread_start (tid);
962 return current_thread;
966 mono_thread_detach_internal (MonoInternalThread *thread)
968 g_return_if_fail (thread != NULL);
970 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
972 thread_cleanup (thread);
974 SET_CURRENT_OBJECT (NULL);
975 mono_domain_unset ();
977 /* Don't need to CloseHandle this thread, even though we took a
978 * reference in mono_thread_attach (), because the GC will do it
979 * when the Thread object is finalised.
984 mono_thread_detach (MonoThread *thread)
987 mono_thread_detach_internal (thread->internal_thread);
993 MonoInternalThread *thread = mono_thread_internal_current ();
995 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
997 thread_cleanup (thread);
998 SET_CURRENT_OBJECT (NULL);
999 mono_domain_unset ();
1001 /* we could add a callback here for embedders to use. */
1002 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1003 exit (mono_environment_exitcode_get ());
1004 mono_thread_info_exit ();
1008 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1010 MonoInternalThread *internal = create_internal_thread ();
1012 internal->state = ThreadState_Unstarted;
1014 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1018 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
1021 StartInfo *start_info;
1022 MonoInternalThread *internal;
1025 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1027 if (!this->internal_thread)
1028 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1029 internal = this->internal_thread;
1031 LOCK_THREAD (internal);
1033 if ((internal->state & ThreadState_Unstarted) == 0) {
1034 UNLOCK_THREAD (internal);
1035 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1039 if ((internal->state & ThreadState_Aborted) != 0) {
1040 UNLOCK_THREAD (internal);
1043 /* This is freed in start_wrapper */
1044 start_info = g_new0 (StartInfo, 1);
1045 start_info->func = NULL;
1046 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1047 start_info->delegate = start;
1048 start_info->obj = this;
1049 g_assert (this->obj.vtable->domain == mono_domain_get ());
1051 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1053 UNLOCK_THREAD (internal);
1057 internal->state &= ~ThreadState_Unstarted;
1059 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1061 UNLOCK_THREAD (internal);
1062 return internal->handle;
1066 * This is called from the finalizer of the internal thread object.
1069 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1071 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1074 * Since threads keep a reference to their thread object while running, by the time this function is called,
1075 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1076 * when thread_cleanup () can be called after this.
1079 CloseHandle (thread);
1081 if (this->synch_cs) {
1082 CRITICAL_SECTION *synch_cs = this->synch_cs;
1083 this->synch_cs = NULL;
1084 DeleteCriticalSection (synch_cs);
1089 void *name = this->name;
1095 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1098 MonoInternalThread *thread = mono_thread_internal_current ();
1100 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1102 mono_thread_current_check_pending_interrupt ();
1105 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1107 res = SleepEx(ms,TRUE);
1109 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1111 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1112 MonoException* exc = mono_thread_execute_interruption (thread);
1114 mono_raise_exception (exc);
1126 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1131 ves_icall_System_Threading_Thread_GetDomainID (void)
1133 return mono_domain_get()->domain_id;
1137 ves_icall_System_Threading_Thread_Yield (void)
1139 return mono_thread_info_yield ();
1143 * mono_thread_get_name:
1145 * Return the name of the thread. NAME_LEN is set to the length of the name.
1146 * Return NULL if the thread has no name. The returned memory is owned by the
1150 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1154 LOCK_THREAD (this_obj);
1156 if (!this_obj->name) {
1160 *name_len = this_obj->name_len;
1161 res = g_new (gunichar2, this_obj->name_len);
1162 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1165 UNLOCK_THREAD (this_obj);
1171 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1175 LOCK_THREAD (this_obj);
1177 if (!this_obj->name)
1180 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1182 UNLOCK_THREAD (this_obj);
1188 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1190 LOCK_THREAD (this_obj);
1192 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1193 UNLOCK_THREAD (this_obj);
1195 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1199 this_obj->name = g_new (gunichar2, mono_string_length (name));
1200 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1201 this_obj->name_len = mono_string_length (name);
1204 this_obj->name = NULL;
1207 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1209 UNLOCK_THREAD (this_obj);
1211 if (this_obj->name && this_obj->tid) {
1212 char *tname = mono_string_to_utf8 (name);
1213 mono_profiler_thread_name (this_obj->tid, tname);
1214 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1220 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1222 mono_thread_set_name_internal (this_obj, name, TRUE);
1225 /* If the array is already in the requested domain, we just return it,
1226 otherwise we return a copy in that domain. */
1228 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1235 if (mono_object_domain (arr) == domain)
1238 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1239 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1244 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1246 return byte_array_to_domain (arr, mono_get_root_domain ());
1250 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1252 return byte_array_to_domain (arr, mono_domain_get ());
1256 mono_thread_current (void)
1258 MonoDomain *domain = mono_domain_get ();
1259 MonoInternalThread *internal = mono_thread_internal_current ();
1260 MonoThread **current_thread_ptr;
1262 g_assert (internal);
1263 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1265 if (!*current_thread_ptr) {
1266 g_assert (domain != mono_get_root_domain ());
1267 *current_thread_ptr = new_thread_with_internal (domain, internal);
1269 return *current_thread_ptr;
1273 mono_thread_internal_current (void)
1275 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1276 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1280 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1281 int ms, HANDLE thread)
1283 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1286 mono_thread_current_check_pending_interrupt ();
1290 if ((this->state & ThreadState_Unstarted) != 0) {
1291 UNLOCK_THREAD (this);
1293 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1297 UNLOCK_THREAD (this);
1302 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1304 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1306 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1308 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1310 if(ret==WAIT_OBJECT_0) {
1311 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1316 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1322 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1330 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1333 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1335 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1337 if (ret != WAIT_IO_COMPLETION)
1340 exc = mono_thread_execute_interruption (thread);
1342 mono_raise_exception (exc);
1347 /* Re-calculate ms according to the time passed */
1348 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1349 if (diff_ms >= ms) {
1353 wait = ms - diff_ms;
1359 /* FIXME: exitContext isnt documented */
1360 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1366 MonoObject *waitHandle;
1367 MonoInternalThread *thread = mono_thread_internal_current ();
1369 /* Do this WaitSleepJoin check before creating objects */
1370 mono_thread_current_check_pending_interrupt ();
1372 /* We fail in managed if the array has more than 64 elements */
1373 numhandles = (guint32)mono_array_length(mono_handles);
1374 handles = g_new0(HANDLE, numhandles);
1376 for(i = 0; i < numhandles; i++) {
1377 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1378 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1385 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1387 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1389 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1393 if(ret==WAIT_FAILED) {
1394 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1396 } else if(ret==WAIT_TIMEOUT) {
1397 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1404 /* FIXME: exitContext isnt documented */
1405 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1407 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1408 uintptr_t numhandles;
1411 MonoObject *waitHandle;
1412 MonoInternalThread *thread = mono_thread_internal_current ();
1414 /* Do this WaitSleepJoin check before creating objects */
1415 mono_thread_current_check_pending_interrupt ();
1417 numhandles = mono_array_length(mono_handles);
1418 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1421 for(i = 0; i < numhandles; i++) {
1422 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1423 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1430 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1432 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1434 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1436 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1439 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1441 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1442 return ret - WAIT_OBJECT_0;
1444 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1445 return ret - WAIT_ABANDONED_0;
1452 /* FIXME: exitContext isnt documented */
1453 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1456 MonoInternalThread *thread = mono_thread_internal_current ();
1458 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1464 mono_thread_current_check_pending_interrupt ();
1466 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1468 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1470 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1472 if(ret==WAIT_FAILED) {
1473 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1475 } else if(ret==WAIT_TIMEOUT) {
1476 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1484 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1487 MonoInternalThread *thread = mono_thread_internal_current ();
1492 mono_thread_current_check_pending_interrupt ();
1494 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1496 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1498 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1500 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1503 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1510 mutex = CreateMutex (NULL, owned, NULL);
1512 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1514 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1522 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1523 return(ReleaseMutex (handle));
1526 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1532 *error = ERROR_SUCCESS;
1534 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1536 *error = GetLastError ();
1543 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1550 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1552 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1553 mono_string_chars (name));
1555 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1563 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1567 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1572 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1576 *error = ERROR_SUCCESS;
1578 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1580 *error = GetLastError ();
1586 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1593 event = CreateEvent (NULL, manual, initial, NULL);
1595 event = CreateEvent (NULL, manual, initial,
1596 mono_string_chars (name));
1598 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1606 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1607 return (SetEvent(handle));
1610 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1611 return (ResetEvent(handle));
1615 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1616 CloseHandle (handle);
1619 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1625 *error = ERROR_SUCCESS;
1627 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1629 *error = GetLastError ();
1635 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1637 return InterlockedIncrement (location);
1640 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1642 #if SIZEOF_VOID_P == 4
1643 if (G_UNLIKELY ((size_t)location & 0x7)) {
1645 mono_interlocked_lock ();
1648 mono_interlocked_unlock ();
1652 return InterlockedIncrement64 (location);
1655 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1657 return InterlockedDecrement(location);
1660 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1662 #if SIZEOF_VOID_P == 4
1663 if (G_UNLIKELY ((size_t)location & 0x7)) {
1665 mono_interlocked_lock ();
1668 mono_interlocked_unlock ();
1672 return InterlockedDecrement64 (location);
1675 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1677 return InterlockedExchange(location, value);
1680 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1683 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1684 mono_gc_wbarrier_generic_nostore (location);
1688 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1690 return InterlockedExchangePointer(location, value);
1693 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1695 IntFloatUnion val, ret;
1698 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1704 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1706 #if SIZEOF_VOID_P == 4
1707 if (G_UNLIKELY ((size_t)location & 0x7)) {
1709 mono_interlocked_lock ();
1712 mono_interlocked_unlock ();
1716 return InterlockedExchange64 (location, value);
1720 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1722 LongDoubleUnion val, ret;
1725 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1730 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1732 return InterlockedCompareExchange(location, value, comparand);
1735 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1738 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1739 mono_gc_wbarrier_generic_nostore (location);
1743 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1745 return InterlockedCompareExchangePointer(location, value, comparand);
1748 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1750 IntFloatUnion val, ret, cmp;
1753 cmp.fval = comparand;
1754 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1760 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1762 #if SIZEOF_VOID_P == 8
1763 LongDoubleUnion val, comp, ret;
1766 comp.fval = comparand;
1767 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1773 mono_interlocked_lock ();
1775 if (old == comparand)
1777 mono_interlocked_unlock ();
1784 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1786 #if SIZEOF_VOID_P == 4
1787 if (G_UNLIKELY ((size_t)location & 0x7)) {
1789 mono_interlocked_lock ();
1791 if (old == comparand)
1793 mono_interlocked_unlock ();
1797 return InterlockedCompareExchange64 (location, value, comparand);
1801 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1804 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1805 mono_gc_wbarrier_generic_nostore (location);
1810 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1813 res = InterlockedExchangePointer ((gpointer *)location, value);
1814 mono_gc_wbarrier_generic_nostore (location);
1819 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1821 return InterlockedAdd (location, value);
1825 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1827 #if SIZEOF_VOID_P == 4
1828 if (G_UNLIKELY ((size_t)location & 0x7)) {
1830 mono_interlocked_lock ();
1833 mono_interlocked_unlock ();
1837 return InterlockedAdd64 (location, value);
1841 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1843 #if SIZEOF_VOID_P == 4
1844 if (G_UNLIKELY ((size_t)location & 0x7)) {
1846 mono_interlocked_lock ();
1848 mono_interlocked_unlock ();
1852 return InterlockedRead64 (location);
1856 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1858 mono_memory_barrier ();
1862 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1864 mono_thread_clr_state (this, state);
1866 if (state & ThreadState_Background) {
1867 /* If the thread changes the background mode, the main thread has to
1868 * be notified, since it has to rebuild the list of threads to
1871 SetEvent (background_change_event);
1876 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1878 mono_thread_set_state (this, state);
1880 if (state & ThreadState_Background) {
1881 /* If the thread changes the background mode, the main thread has to
1882 * be notified, since it has to rebuild the list of threads to
1885 SetEvent (background_change_event);
1890 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1896 state = this->state;
1898 UNLOCK_THREAD (this);
1903 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1905 MonoInternalThread *current;
1910 current = mono_thread_internal_current ();
1912 this->thread_interrupt_requested = TRUE;
1913 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1915 UNLOCK_THREAD (this);
1918 abort_thread_internal (this, TRUE, FALSE);
1922 void mono_thread_current_check_pending_interrupt ()
1924 MonoInternalThread *thread = mono_thread_internal_current ();
1925 gboolean throw = FALSE;
1927 LOCK_THREAD (thread);
1929 if (thread->thread_interrupt_requested) {
1931 thread->thread_interrupt_requested = FALSE;
1934 UNLOCK_THREAD (thread);
1937 mono_raise_exception (mono_get_exception_thread_interrupted ());
1942 mono_thread_get_abort_signal (void)
1946 #elif defined(PLATFORM_ANDROID)
1948 #elif !defined (SIGRTMIN)
1953 #endif /* SIGUSR1 */
1955 static int abort_signum = -1;
1957 if (abort_signum != -1)
1958 return abort_signum;
1959 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1960 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1961 struct sigaction sinfo;
1962 sigaction (i, NULL, &sinfo);
1963 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1968 /* fallback to the old way */
1970 #endif /* HOST_WIN32 */
1974 static void CALLBACK interruption_request_apc (ULONG_PTR param)
1976 MonoException* exc = mono_thread_request_interruption (FALSE);
1977 if (exc) mono_raise_exception (exc);
1979 #endif /* HOST_WIN32 */
1982 * signal_thread_state_change
1984 * Tells the thread that his state has changed and it has to enter the new
1985 * state as soon as possible.
1987 static void signal_thread_state_change (MonoInternalThread *thread)
1990 gpointer wait_handle;
1993 if (thread == mono_thread_internal_current ()) {
1994 /* Do it synchronously */
1995 MonoException *exc = mono_thread_request_interruption (FALSE);
1997 mono_raise_exception (exc);
2001 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, (ULONG_PTR)NULL);
2004 * This will cause waits to be broken.
2005 * It will also prevent the thread from entering a wait, so if the thread returns
2006 * from the wait before it receives the abort signal, it will just spin in the wait
2007 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2010 wait_handle = wapi_prepare_interrupt_thread (thread->handle);
2012 /* fixme: store the state somewhere */
2013 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2015 wapi_finish_interrupt_thread (wait_handle);
2016 #endif /* HOST_WIN32 */
2020 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2022 LOCK_THREAD (thread);
2024 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2025 (thread->state & ThreadState_StopRequested) != 0 ||
2026 (thread->state & ThreadState_Stopped) != 0)
2028 UNLOCK_THREAD (thread);
2032 if ((thread->state & ThreadState_Unstarted) != 0) {
2033 thread->state |= ThreadState_Aborted;
2034 UNLOCK_THREAD (thread);
2038 thread->state |= ThreadState_AbortRequested;
2039 if (thread->abort_state_handle)
2040 mono_gchandle_free (thread->abort_state_handle);
2042 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2043 g_assert (thread->abort_state_handle);
2045 thread->abort_state_handle = 0;
2047 thread->abort_exc = NULL;
2050 * abort_exc is set in mono_thread_execute_interruption(),
2051 * triggered by the call to signal_thread_state_change(),
2052 * below. There's a point between where we have
2053 * abort_state_handle set, but abort_exc NULL, but that's not
2057 UNLOCK_THREAD (thread);
2059 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2061 /* During shutdown, we can't wait for other threads */
2063 /* Make sure the thread is awake */
2064 mono_thread_resume (thread);
2066 abort_thread_internal (thread, TRUE, TRUE);
2070 ves_icall_System_Threading_Thread_ResetAbort (void)
2072 MonoInternalThread *thread = mono_thread_internal_current ();
2073 gboolean was_aborting;
2075 LOCK_THREAD (thread);
2076 was_aborting = thread->state & ThreadState_AbortRequested;
2077 thread->state &= ~ThreadState_AbortRequested;
2078 UNLOCK_THREAD (thread);
2080 if (!was_aborting) {
2081 const char *msg = "Unable to reset abort because no abort was requested";
2082 mono_raise_exception (mono_get_exception_thread_state (msg));
2084 thread->abort_exc = NULL;
2085 if (thread->abort_state_handle) {
2086 mono_gchandle_free (thread->abort_state_handle);
2087 /* This is actually not necessary - the handle
2088 only counts if the exception is set */
2089 thread->abort_state_handle = 0;
2094 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2096 LOCK_THREAD (thread);
2098 thread->state &= ~ThreadState_AbortRequested;
2100 if (thread->abort_exc) {
2101 thread->abort_exc = NULL;
2102 if (thread->abort_state_handle) {
2103 mono_gchandle_free (thread->abort_state_handle);
2104 /* This is actually not necessary - the handle
2105 only counts if the exception is set */
2106 thread->abort_state_handle = 0;
2110 UNLOCK_THREAD (thread);
2114 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2116 MonoInternalThread *thread = this->internal_thread;
2117 MonoObject *state, *deserialized = NULL, *exc;
2120 if (!thread->abort_state_handle)
2123 state = mono_gchandle_get_target (thread->abort_state_handle);
2126 domain = mono_domain_get ();
2127 if (mono_object_domain (state) == domain)
2130 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2132 if (!deserialized) {
2133 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2135 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2136 mono_raise_exception (invalid_op_exc);
2139 return deserialized;
2143 mono_thread_suspend (MonoInternalThread *thread)
2145 LOCK_THREAD (thread);
2147 if ((thread->state & ThreadState_Unstarted) != 0 ||
2148 (thread->state & ThreadState_Aborted) != 0 ||
2149 (thread->state & ThreadState_Stopped) != 0)
2151 UNLOCK_THREAD (thread);
2155 if ((thread->state & ThreadState_Suspended) != 0 ||
2156 (thread->state & ThreadState_SuspendRequested) != 0 ||
2157 (thread->state & ThreadState_StopRequested) != 0)
2159 UNLOCK_THREAD (thread);
2163 thread->state |= ThreadState_SuspendRequested;
2165 UNLOCK_THREAD (thread);
2167 suspend_thread_internal (thread, FALSE);
2172 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2174 if (!mono_thread_suspend (thread))
2175 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2179 mono_thread_resume (MonoInternalThread *thread)
2181 LOCK_THREAD (thread);
2183 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2184 thread->state &= ~ThreadState_SuspendRequested;
2185 UNLOCK_THREAD (thread);
2189 if ((thread->state & ThreadState_Suspended) == 0 ||
2190 (thread->state & ThreadState_Unstarted) != 0 ||
2191 (thread->state & ThreadState_Aborted) != 0 ||
2192 (thread->state & ThreadState_Stopped) != 0)
2194 UNLOCK_THREAD (thread);
2198 return resume_thread_internal (thread);
2202 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2204 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2205 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2209 mono_threads_is_critical_method (MonoMethod *method)
2211 switch (method->wrapper_type) {
2212 case MONO_WRAPPER_RUNTIME_INVOKE:
2213 case MONO_WRAPPER_XDOMAIN_INVOKE:
2214 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2221 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2226 if (mono_threads_is_critical_method (m)) {
2227 *((gboolean*)data) = TRUE;
2234 is_running_protected_wrapper (void)
2236 gboolean found = FALSE;
2237 mono_stack_walk (find_wrapper, &found);
2241 void mono_thread_internal_stop (MonoInternalThread *thread)
2243 LOCK_THREAD (thread);
2245 if ((thread->state & ThreadState_StopRequested) != 0 ||
2246 (thread->state & ThreadState_Stopped) != 0)
2248 UNLOCK_THREAD (thread);
2252 /* Make sure the thread is awake */
2253 mono_thread_resume (thread);
2255 thread->state |= ThreadState_StopRequested;
2256 thread->state &= ~ThreadState_AbortRequested;
2258 UNLOCK_THREAD (thread);
2260 abort_thread_internal (thread, TRUE, TRUE);
2263 void mono_thread_stop (MonoThread *thread)
2265 mono_thread_internal_stop (thread->internal_thread);
2269 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2272 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2277 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2280 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2285 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2288 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2293 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2296 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2301 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2304 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2305 return (void *) tmp;
2309 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2311 volatile MonoObject *tmp;
2312 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2313 return (MonoObject *) tmp;
2317 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2320 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2325 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2328 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2333 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2335 return InterlockedRead8 (ptr);
2339 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2341 return InterlockedRead16 (ptr);
2345 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2347 return InterlockedRead (ptr);
2351 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2353 #if SIZEOF_VOID_P == 4
2354 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2356 mono_interlocked_lock ();
2357 val = *(gint64*)ptr;
2358 mono_interlocked_unlock ();
2362 return InterlockedRead64 (ptr);
2366 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2368 return InterlockedReadPointer (ptr);
2372 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2376 #if SIZEOF_VOID_P == 4
2377 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2379 mono_interlocked_lock ();
2380 val = *(double*)ptr;
2381 mono_interlocked_unlock ();
2386 u.ival = InterlockedRead64 (ptr);
2392 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2396 u.ival = InterlockedRead (ptr);
2402 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2404 return InterlockedReadPointer (ptr);
2408 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2410 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2414 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2416 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2420 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2422 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2426 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2428 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2432 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2434 mono_atomic_store_release ((volatile void **) ptr, value);
2438 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2440 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2444 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2446 mono_atomic_store_release ((volatile double *) ptr, value);
2450 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2452 mono_atomic_store_release ((volatile float *) ptr, value);
2456 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2458 InterlockedWrite8 (ptr, value);
2462 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2464 InterlockedWrite16 (ptr, value);
2468 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2470 InterlockedWrite (ptr, value);
2474 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2476 #if SIZEOF_VOID_P == 4
2477 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2478 mono_interlocked_lock ();
2479 *(gint64*)ptr = value;
2480 mono_interlocked_unlock ();
2485 InterlockedWrite64 (ptr, value);
2489 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2491 InterlockedWritePointer (ptr, value);
2495 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2499 #if SIZEOF_VOID_P == 4
2500 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2501 mono_interlocked_lock ();
2502 *(double*)ptr = value;
2503 mono_interlocked_unlock ();
2510 InterlockedWrite64 (ptr, u.ival);
2514 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2520 InterlockedWrite (ptr, u.ival);
2524 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2526 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2530 mono_thread_init_tls (void)
2532 MONO_FAST_TLS_INIT (tls_current_object);
2533 mono_native_tls_alloc (¤t_object_key, NULL);
2536 void mono_thread_init (MonoThreadStartCB start_cb,
2537 MonoThreadAttachCB attach_cb)
2539 InitializeCriticalSection(&threads_mutex);
2540 InitializeCriticalSection(&interlocked_mutex);
2541 InitializeCriticalSection(&contexts_mutex);
2542 InitializeCriticalSection(&joinable_threads_mutex);
2544 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2545 g_assert(background_change_event != NULL);
2547 mono_init_static_data_info (&thread_static_info);
2548 mono_init_static_data_info (&context_static_info);
2550 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2552 mono_thread_start_cb = start_cb;
2553 mono_thread_attach_cb = attach_cb;
2555 /* Get a pseudo handle to the current process. This is just a
2556 * kludge so that wapi can build a process handle if needed.
2557 * As a pseudo handle is returned, we don't need to clean
2560 GetCurrentProcess ();
2563 void mono_thread_cleanup (void)
2565 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2566 MonoThreadInfo *info;
2568 /* The main thread must abandon any held mutexes (particularly
2569 * important for named mutexes as they are shared across
2570 * processes, see bug 74680.) This will happen when the
2571 * thread exits, but if it's not running in a subthread it
2572 * won't exit in time.
2574 info = mono_thread_info_current ();
2575 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2579 /* This stuff needs more testing, it seems one of these
2580 * critical sections can be locked when mono_thread_cleanup is
2583 DeleteCriticalSection (&threads_mutex);
2584 DeleteCriticalSection (&interlocked_mutex);
2585 DeleteCriticalSection (&contexts_mutex);
2586 DeleteCriticalSection (&delayed_free_table_mutex);
2587 DeleteCriticalSection (&small_id_mutex);
2588 CloseHandle (background_change_event);
2591 mono_native_tls_free (current_object_key);
2595 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2597 mono_thread_cleanup_fn = func;
2601 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2603 thread->internal_thread->manage_callback = func;
2606 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2608 mono_thread_notify_pending_exc_fn = func;
2612 static void print_tids (gpointer key, gpointer value, gpointer user)
2614 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2615 * sizeof(uint) and a cast to uint would overflow
2617 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2618 * print this as a pointer.
2620 g_message ("Waiting for: %p", key);
2625 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2626 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2630 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2634 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2636 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2638 if(ret==WAIT_FAILED) {
2639 /* See the comment in build_wait_tids() */
2640 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2644 for(i=0; i<wait->num; i++)
2645 CloseHandle (wait->handles[i]);
2647 if (ret == WAIT_TIMEOUT)
2650 for(i=0; i<wait->num; i++) {
2651 gsize tid = wait->threads[i]->tid;
2654 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2655 * it can still run io-layer etc. code. So wait for it to really exit.
2656 * FIXME: This won't join threads which are not in the joinable_hash yet.
2658 mono_thread_join ((gpointer)tid);
2660 mono_threads_lock ();
2661 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2662 /* This thread must have been killed, because
2663 * it hasn't cleaned itself up. (It's just
2664 * possible that the thread exited before the
2665 * parent thread had a chance to store the
2666 * handle, and now there is another pointer to
2667 * the already-exited thread stored. In this
2668 * case, we'll just get two
2669 * mono_profiler_thread_end() calls for the
2673 mono_threads_unlock ();
2674 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2675 thread_cleanup (wait->threads[i]);
2677 mono_threads_unlock ();
2682 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2684 guint32 i, ret, count;
2686 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2688 /* Add the thread state change event, so it wakes up if a thread changes
2689 * to background mode.
2692 if (count < MAXIMUM_WAIT_OBJECTS) {
2693 wait->handles [count] = background_change_event;
2697 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2699 if(ret==WAIT_FAILED) {
2700 /* See the comment in build_wait_tids() */
2701 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2705 for(i=0; i<wait->num; i++)
2706 CloseHandle (wait->handles[i]);
2708 if (ret == WAIT_TIMEOUT)
2711 if (ret < wait->num) {
2712 gsize tid = wait->threads[ret]->tid;
2713 mono_threads_lock ();
2714 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2715 /* See comment in wait_for_tids about thread cleanup */
2716 mono_threads_unlock ();
2717 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2718 thread_cleanup (wait->threads [ret]);
2720 mono_threads_unlock ();
2724 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2726 struct wait_data *wait=(struct wait_data *)user;
2728 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2730 MonoInternalThread *thread=(MonoInternalThread *)value;
2732 /* Ignore background threads, we abort them later */
2733 /* Do not lock here since it is not needed and the caller holds threads_lock */
2734 if (thread->state & ThreadState_Background) {
2735 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2736 return; /* just leave, ignore */
2739 if (mono_gc_is_finalizer_internal_thread (thread)) {
2740 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2744 if (thread == mono_thread_internal_current ()) {
2745 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2749 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2750 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2754 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2755 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2759 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2760 if (handle == NULL) {
2761 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2765 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2766 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2767 wait->handles[wait->num]=handle;
2768 wait->threads[wait->num]=thread;
2771 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2773 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2778 /* Just ignore the rest, we can't do anything with
2785 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2787 struct wait_data *wait=(struct wait_data *)user;
2788 gsize self = GetCurrentThreadId ();
2789 MonoInternalThread *thread = value;
2792 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2795 /* The finalizer thread is not a background thread */
2796 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2797 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2799 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2803 /* printf ("A: %d\n", wait->num); */
2804 wait->handles[wait->num]=thread->handle;
2805 wait->threads[wait->num]=thread;
2808 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2809 mono_thread_internal_stop (thread);
2813 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2817 * mono_threads_set_shutting_down:
2819 * Is called by a thread that wants to shut down Mono. If the runtime is already
2820 * shutting down, the calling thread is suspended/stopped, and this function never
2824 mono_threads_set_shutting_down (void)
2826 MonoInternalThread *current_thread = mono_thread_internal_current ();
2828 mono_threads_lock ();
2830 if (shutting_down) {
2831 mono_threads_unlock ();
2833 /* Make sure we're properly suspended/stopped */
2835 LOCK_THREAD (current_thread);
2837 if ((current_thread->state & ThreadState_SuspendRequested) ||
2838 (current_thread->state & ThreadState_AbortRequested) ||
2839 (current_thread->state & ThreadState_StopRequested)) {
2840 UNLOCK_THREAD (current_thread);
2841 mono_thread_execute_interruption (current_thread);
2843 current_thread->state |= ThreadState_Stopped;
2844 UNLOCK_THREAD (current_thread);
2847 /*since we're killing the thread, unset the current domain.*/
2848 mono_domain_unset ();
2850 /* Wake up other threads potentially waiting for us */
2851 mono_thread_info_exit ();
2853 shutting_down = TRUE;
2855 /* Not really a background state change, but this will
2856 * interrupt the main thread if it is waiting for all
2857 * the other threads.
2859 SetEvent (background_change_event);
2861 mono_threads_unlock ();
2865 void mono_thread_manage (void)
2867 struct wait_data wait_data;
2868 struct wait_data *wait = &wait_data;
2870 memset (wait, 0, sizeof (struct wait_data));
2871 /* join each thread that's still running */
2872 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2874 mono_threads_lock ();
2876 THREAD_DEBUG (g_message("%s: No threads", __func__));
2877 mono_threads_unlock ();
2880 mono_threads_unlock ();
2883 mono_threads_lock ();
2884 if (shutting_down) {
2885 /* somebody else is shutting down */
2886 mono_threads_unlock ();
2889 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2890 mono_g_hash_table_foreach (threads, print_tids, NULL));
2892 ResetEvent (background_change_event);
2894 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2895 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2896 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2897 mono_threads_unlock ();
2899 /* Something to wait for */
2900 wait_for_tids_or_state_change (wait, INFINITE);
2902 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2903 } while(wait->num>0);
2905 /* Mono is shutting down, so just wait for the end */
2906 if (!mono_runtime_try_shutdown ()) {
2907 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2908 mono_thread_suspend (mono_thread_internal_current ());
2909 mono_thread_execute_interruption (mono_thread_internal_current ());
2913 * Remove everything but the finalizer thread and self.
2914 * Also abort all the background threads
2917 mono_threads_lock ();
2920 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2921 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2922 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2924 mono_threads_unlock ();
2926 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2928 /* Something to wait for */
2929 wait_for_tids (wait, INFINITE);
2931 } while (wait->num > 0);
2934 * give the subthreads a chance to really quit (this is mainly needed
2935 * to get correct user and system times from getrusage/wait/time(1)).
2936 * This could be removed if we avoid pthread_detach() and use pthread_join().
2939 mono_thread_info_yield ();
2943 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2945 MonoInternalThread *thread=(MonoInternalThread *)value;
2947 if(thread->tid != (gsize)user) {
2948 /*TerminateThread (thread->handle, -1);*/
2952 void mono_thread_abort_all_other_threads (void)
2954 gsize self = GetCurrentThreadId ();
2956 mono_threads_lock ();
2957 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2958 mono_g_hash_table_size (threads));
2959 mono_g_hash_table_foreach (threads, print_tids, NULL));
2961 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2963 mono_threads_unlock ();
2967 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2969 MonoInternalThread *thread = (MonoInternalThread*)value;
2970 struct wait_data *wait = (struct wait_data*)user_data;
2974 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2976 * This needs no locking.
2978 if ((thread->state & ThreadState_Suspended) != 0 ||
2979 (thread->state & ThreadState_Stopped) != 0)
2982 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2983 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2987 wait->handles [wait->num] = handle;
2988 wait->threads [wait->num] = thread;
2994 * mono_thread_suspend_all_other_threads:
2996 * Suspend all managed threads except the finalizer thread and this thread. It is
2997 * not possible to resume them later.
2999 void mono_thread_suspend_all_other_threads (void)
3001 struct wait_data wait_data;
3002 struct wait_data *wait = &wait_data;
3004 gsize self = GetCurrentThreadId ();
3006 guint32 eventidx = 0;
3007 gboolean starting, finished;
3009 memset (wait, 0, sizeof (struct wait_data));
3011 * The other threads could be in an arbitrary state at this point, i.e.
3012 * they could be starting up, shutting down etc. This means that there could be
3013 * threads which are not even in the threads hash table yet.
3017 * First we set a barrier which will be checked by all threads before they
3018 * are added to the threads hash table, and they will exit if the flag is set.
3019 * This ensures that no threads could be added to the hash later.
3020 * We will use shutting_down as the barrier for now.
3022 g_assert (shutting_down);
3025 * We make multiple calls to WaitForMultipleObjects since:
3026 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3027 * - some threads could exit without becoming suspended
3032 * Make a copy of the hashtable since we can't do anything with
3033 * threads while threads_mutex is held.
3036 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3037 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3038 mono_threads_lock ();
3039 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3040 mono_threads_unlock ();
3042 events = g_new0 (gpointer, wait->num);
3044 /* Get the suspended events that we'll be waiting for */
3045 for (i = 0; i < wait->num; ++i) {
3046 MonoInternalThread *thread = wait->threads [i];
3047 gboolean signal_suspend = FALSE;
3049 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3050 //CloseHandle (wait->handles [i]);
3051 wait->threads [i] = NULL; /* ignore this thread in next loop */
3055 LOCK_THREAD (thread);
3057 if (thread->suspended_event == NULL) {
3058 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3059 if (thread->suspended_event == NULL) {
3060 /* Forget this one and go on to the next */
3061 UNLOCK_THREAD (thread);
3066 if ((thread->state & ThreadState_Suspended) != 0 ||
3067 (thread->state & ThreadState_StopRequested) != 0 ||
3068 (thread->state & ThreadState_Stopped) != 0) {
3069 UNLOCK_THREAD (thread);
3070 CloseHandle (wait->handles [i]);
3071 wait->threads [i] = NULL; /* ignore this thread in next loop */
3075 if ((thread->state & ThreadState_SuspendRequested) == 0)
3076 signal_suspend = TRUE;
3078 events [eventidx++] = thread->suspended_event;
3080 /* Convert abort requests into suspend requests */
3081 if ((thread->state & ThreadState_AbortRequested) != 0)
3082 thread->state &= ~ThreadState_AbortRequested;
3084 thread->state |= ThreadState_SuspendRequested;
3086 UNLOCK_THREAD (thread);
3088 /* Signal the thread to suspend */
3089 if (mono_thread_info_new_interrupt_enabled ())
3090 suspend_thread_internal (thread, TRUE);
3091 else if (signal_suspend)
3092 signal_thread_state_change (thread);
3095 /*Only wait on the suspend event if we are using the old path */
3096 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3097 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3098 for (i = 0; i < wait->num; ++i) {
3099 MonoInternalThread *thread = wait->threads [i];
3104 LOCK_THREAD (thread);
3105 if ((thread->state & ThreadState_Suspended) != 0) {
3106 CloseHandle (thread->suspended_event);
3107 thread->suspended_event = NULL;
3109 UNLOCK_THREAD (thread);
3113 if (eventidx <= 0) {
3115 * If there are threads which are starting up, we wait until they
3116 * are suspended when they try to register in the threads hash.
3117 * This is guaranteed to finish, since the threads which can create new
3118 * threads get suspended after a while.
3119 * FIXME: The finalizer thread can still create new threads.
3121 mono_threads_lock ();
3122 if (threads_starting_up)
3123 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3126 mono_threads_unlock ();
3138 collect_threads (gpointer key, gpointer value, gpointer user_data)
3140 MonoInternalThread *thread = (MonoInternalThread*)value;
3141 struct wait_data *wait = (struct wait_data*)user_data;
3144 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3145 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3149 wait->handles [wait->num] = handle;
3150 wait->threads [wait->num] = thread;
3155 static gboolean thread_dump_requested;
3157 static G_GNUC_UNUSED gboolean
3158 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3160 GString *p = (GString*)data;
3161 MonoMethod *method = NULL;
3163 method = mono_jit_info_get_method (frame->ji);
3166 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3167 g_string_append_printf (p, " %s\n", location);
3170 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3176 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3178 GString* text = g_string_new (0);
3180 GError *error = NULL;
3183 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3185 g_string_append_printf (text, "\n\"%s\"", name);
3188 else if (thread->threadpool_thread)
3189 g_string_append (text, "\n\"<threadpool thread>\"");
3191 g_string_append (text, "\n\"<unnamed thread>\"");
3194 /* This no longer works with remote unwinding */
3196 wapi_desc = wapi_current_thread_desc ();
3197 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3202 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3203 mono_thread_info_finish_suspend_and_resume (info);
3205 fprintf (stdout, "%s", text->str);
3207 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3208 OutputDebugStringA(text->str);
3211 g_string_free (text, TRUE);
3216 dump_thread (gpointer key, gpointer value, gpointer user)
3218 MonoInternalThread *thread = (MonoInternalThread *)value;
3219 MonoThreadInfo *info;
3221 if (thread == mono_thread_internal_current ())
3225 FIXME This still can hang if we stop a thread during malloc.
3226 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3227 that takes a callback and runs it with the target suspended.
3228 We probably should loop a bit around trying to get it to either managed code
3231 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3236 print_thread_dump (thread, info);
3240 mono_threads_perform_thread_dump (void)
3242 if (!thread_dump_requested)
3245 printf ("Full thread dump:\n");
3248 * Make a copy of the hashtable since we can't do anything with
3249 * threads while threads_mutex is held.
3251 mono_threads_lock ();
3252 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3253 mono_threads_unlock ();
3255 thread_dump_requested = FALSE;
3259 * mono_threads_request_thread_dump:
3261 * Ask all threads except the current to print their stacktrace to stdout.
3264 mono_threads_request_thread_dump (void)
3266 struct wait_data wait_data;
3267 struct wait_data *wait = &wait_data;
3270 /*The new thread dump code runs out of the finalizer thread. */
3271 if (mono_thread_info_new_interrupt_enabled ()) {
3272 thread_dump_requested = TRUE;
3273 mono_gc_finalize_notify ();
3278 memset (wait, 0, sizeof (struct wait_data));
3281 * Make a copy of the hashtable since we can't do anything with
3282 * threads while threads_mutex is held.
3284 mono_threads_lock ();
3285 mono_g_hash_table_foreach (threads, collect_threads, wait);
3286 mono_threads_unlock ();
3288 for (i = 0; i < wait->num; ++i) {
3289 MonoInternalThread *thread = wait->threads [i];
3291 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3292 (thread != mono_thread_internal_current ()) &&
3293 !thread->thread_dump_requested) {
3294 thread->thread_dump_requested = TRUE;
3296 signal_thread_state_change (thread);
3299 CloseHandle (wait->handles [i]);
3305 gint allocated; /* +1 so that refs [allocated] == NULL */
3309 typedef struct ref_stack RefStack;
3312 ref_stack_new (gint initial_size)
3316 initial_size = MAX (initial_size, 16) + 1;
3317 rs = g_new0 (RefStack, 1);
3318 rs->refs = g_new0 (gpointer, initial_size);
3319 rs->allocated = initial_size;
3324 ref_stack_destroy (gpointer ptr)
3335 ref_stack_push (RefStack *rs, gpointer ptr)
3337 g_assert (rs != NULL);
3339 if (rs->bottom >= rs->allocated) {
3340 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3341 rs->allocated <<= 1;
3342 rs->refs [rs->allocated] = NULL;
3344 rs->refs [rs->bottom++] = ptr;
3348 ref_stack_pop (RefStack *rs)
3350 if (rs == NULL || rs->bottom == 0)
3354 rs->refs [rs->bottom] = NULL;
3358 ref_stack_find (RefStack *rs, gpointer ptr)
3365 for (refs = rs->refs; refs && *refs; refs++) {
3373 * mono_thread_push_appdomain_ref:
3375 * Register that the current thread may have references to objects in domain
3376 * @domain on its stack. Each call to this function should be paired with a
3377 * call to pop_appdomain_ref.
3380 mono_thread_push_appdomain_ref (MonoDomain *domain)
3382 MonoInternalThread *thread = mono_thread_internal_current ();
3385 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3386 SPIN_LOCK (thread->lock_thread_id);
3387 if (thread->appdomain_refs == NULL)
3388 thread->appdomain_refs = ref_stack_new (16);
3389 ref_stack_push (thread->appdomain_refs, domain);
3390 SPIN_UNLOCK (thread->lock_thread_id);
3395 mono_thread_pop_appdomain_ref (void)
3397 MonoInternalThread *thread = mono_thread_internal_current ();
3400 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3401 SPIN_LOCK (thread->lock_thread_id);
3402 ref_stack_pop (thread->appdomain_refs);
3403 SPIN_UNLOCK (thread->lock_thread_id);
3408 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3411 SPIN_LOCK (thread->lock_thread_id);
3412 res = ref_stack_find (thread->appdomain_refs, domain);
3413 SPIN_UNLOCK (thread->lock_thread_id);
3418 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3420 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3423 typedef struct abort_appdomain_data {
3424 struct wait_data wait;
3426 } abort_appdomain_data;
3429 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3431 MonoInternalThread *thread = (MonoInternalThread*)value;
3432 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3433 MonoDomain *domain = data->domain;
3435 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3436 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3438 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3439 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3442 data->wait.handles [data->wait.num] = handle;
3443 data->wait.threads [data->wait.num] = thread;
3446 /* Just ignore the rest, we can't do anything with
3454 * mono_threads_abort_appdomain_threads:
3456 * Abort threads which has references to the given appdomain.
3459 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3461 #ifdef __native_client__
3465 abort_appdomain_data user_data;
3467 int orig_timeout = timeout;
3470 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3472 start_time = mono_msec_ticks ();
3474 mono_threads_lock ();
3476 user_data.domain = domain;
3477 user_data.wait.num = 0;
3478 /* This shouldn't take any locks */
3479 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3480 mono_threads_unlock ();
3482 if (user_data.wait.num > 0) {
3483 /* Abort the threads outside the threads lock */
3484 for (i = 0; i < user_data.wait.num; ++i)
3485 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3488 * We should wait for the threads either to abort, or to leave the
3489 * domain. We can't do the latter, so we wait with a timeout.
3491 wait_for_tids (&user_data.wait, 100);
3494 /* Update remaining time */
3495 timeout -= mono_msec_ticks () - start_time;
3496 start_time = mono_msec_ticks ();
3498 if (orig_timeout != -1 && timeout < 0)
3501 while (user_data.wait.num > 0);
3503 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3509 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3511 MonoInternalThread *thread = (MonoInternalThread*)value;
3512 MonoDomain *domain = (MonoDomain*)user_data;
3515 /* No locking needed here */
3516 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3518 if (thread->cached_culture_info) {
3519 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3520 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3521 if (obj && obj->vtable->domain == domain)
3522 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3528 * mono_threads_clear_cached_culture:
3530 * Clear the cached_current_culture from all threads if it is in the
3534 mono_threads_clear_cached_culture (MonoDomain *domain)
3536 mono_threads_lock ();
3537 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3538 mono_threads_unlock ();
3542 * mono_thread_get_undeniable_exception:
3544 * Return an exception which needs to be raised when leaving a catch clause.
3545 * This is used for undeniable exception propagation.
3548 mono_thread_get_undeniable_exception (void)
3550 MonoInternalThread *thread = mono_thread_internal_current ();
3552 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3554 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3555 * exception if the thread no longer references a dying appdomain.
3557 thread->abort_exc->trace_ips = NULL;
3558 thread->abort_exc->stack_trace = NULL;
3559 return thread->abort_exc;
3565 #if MONO_SMALL_CONFIG
3566 #define NUM_STATIC_DATA_IDX 4
3567 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3571 #define NUM_STATIC_DATA_IDX 8
3572 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3573 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3577 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3580 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3583 gpointer *static_data = addr;
3584 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3587 if (!static_data [i])
3589 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3590 ptr = static_data [i];
3591 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3592 uintptr_t bmap = static_reference_bitmaps [i][j];
3595 if ((bmap & 1) && *p) {
3606 * mono_alloc_static_data
3608 * Allocate memory blocks for storing threads or context static data
3611 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3613 guint idx = (offset >> 24) - 1;
3616 gpointer* static_data = *static_data_ptr;
3618 static void* tls_desc = NULL;
3619 if (mono_gc_user_markers_supported () && !tls_desc)
3620 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3621 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3622 *static_data_ptr = static_data;
3623 static_data [0] = static_data;
3626 for (i = 1; i <= idx; ++i) {
3627 if (static_data [i])
3629 if (mono_gc_user_markers_supported () && threadlocal)
3630 static_data [i] = g_malloc0 (static_data_size [i]);
3632 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3637 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3640 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3641 gpointer p = static_data [i];
3645 * At this point, the static data pointer array is still registered with the
3646 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3647 * data. Freeing the individual arrays without first nulling their slots
3648 * would make it possible for mark_tls_slots() to encounter a pointer to
3649 * such an already freed array. See bug #13813.
3651 static_data [i] = NULL;
3652 mono_memory_write_barrier ();
3653 if (mono_gc_user_markers_supported () && threadlocal)
3656 mono_gc_free_fixed (p);
3658 mono_gc_free_fixed (static_data);
3662 * mono_init_static_data_info
3664 * Initializes static data counters
3666 static void mono_init_static_data_info (StaticDataInfo *static_data)
3668 static_data->idx = 0;
3669 static_data->offset = 0;
3670 static_data->freelist = NULL;
3674 * mono_alloc_static_data_slot
3676 * Generates an offset for static data. static_data contains the counters
3677 * used to generate it.
3680 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3684 if (!static_data->idx && !static_data->offset) {
3686 * we use the first chunk of the first allocation also as
3687 * an array for the rest of the data
3689 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3691 static_data->offset += align - 1;
3692 static_data->offset &= ~(align - 1);
3693 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3694 static_data->idx ++;
3695 g_assert (size <= static_data_size [static_data->idx]);
3696 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3697 static_data->offset = 0;
3699 offset = static_data->offset | ((static_data->idx + 1) << 24);
3700 static_data->offset += size;
3705 * ensure thread static fields already allocated are valid for thread
3706 * This function is called when a thread is created or on thread attach.
3709 thread_adjust_static_data (MonoInternalThread *thread)
3713 mono_threads_lock ();
3714 if (thread_static_info.offset || thread_static_info.idx > 0) {
3715 /* get the current allocated size */
3716 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3717 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3719 mono_threads_unlock ();
3723 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3725 MonoInternalThread *thread = value;
3726 guint32 offset = GPOINTER_TO_UINT (user);
3728 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3731 static MonoThreadDomainTls*
3732 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3734 MonoThreadDomainTls* prev = NULL;
3735 MonoThreadDomainTls* tmp = static_data->freelist;
3737 if (tmp->size == size) {
3739 prev->next = tmp->next;
3741 static_data->freelist = tmp->next;
3750 #if SIZEOF_VOID_P == 4
3757 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3760 int idx = (offset >> 24) - 1;
3762 if (!static_reference_bitmaps [idx])
3763 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3764 rb = static_reference_bitmaps [idx];
3766 offset /= sizeof (gpointer);
3767 /* offset is now the bitmap offset */
3768 for (i = 0; i < numbits; ++i) {
3769 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3770 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (ONE_P << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3775 clear_reference_bitmap (guint32 offset, guint32 size)
3777 int idx = (offset >> 24) - 1;
3779 rb = static_reference_bitmaps [idx];
3781 offset /= sizeof (gpointer);
3782 size /= sizeof (gpointer);
3784 /* offset is now the bitmap offset */
3785 for (; offset < size; ++offset)
3786 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3790 * The offset for a special static variable is composed of three parts:
3791 * a bit that indicates the type of static data (0:thread, 1:context),
3792 * an index in the array of chunks of memory for the thread (thread->static_data)
3793 * and an offset in that chunk of mem. This allows allocating less memory in the
3798 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3801 if (static_type == SPECIAL_STATIC_THREAD) {
3802 MonoThreadDomainTls *item;
3803 mono_threads_lock ();
3804 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3805 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3807 offset = item->offset;
3810 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3812 update_tls_reference_bitmap (offset, bitmap, numbits);
3813 /* This can be called during startup */
3814 if (threads != NULL)
3815 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3816 mono_threads_unlock ();
3818 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3819 mono_contexts_lock ();
3820 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3821 mono_contexts_unlock ();
3822 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3828 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3830 /* The high bit means either thread (0) or static (1) data. */
3832 guint32 static_type = (offset & 0x80000000);
3835 offset &= 0x7fffffff;
3836 idx = (offset >> 24) - 1;
3838 if (static_type == 0) {
3839 return get_thread_static_data (thread, offset);
3841 /* Allocate static data block under demand, since we don't have a list
3844 MonoAppContext *context = mono_context_get ();
3845 if (!context->static_data || !context->static_data [idx]) {
3846 mono_contexts_lock ();
3847 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3848 mono_contexts_unlock ();
3850 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3855 mono_get_special_static_data (guint32 offset)
3857 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3866 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3868 MonoInternalThread *thread = value;
3869 TlsOffsetSize *data = user;
3870 int idx = (data->offset >> 24) - 1;
3873 if (!thread->static_data || !thread->static_data [idx])
3875 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3876 mono_gc_bzero_atomic (ptr, data->size);
3880 do_free_special_slot (guint32 offset, guint32 size)
3882 guint32 static_type = (offset & 0x80000000);
3883 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3884 if (static_type == 0) {
3886 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3887 data.offset = offset & 0x7fffffff;
3889 clear_reference_bitmap (data.offset, data.size);
3890 if (threads != NULL)
3891 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3892 item->offset = offset;
3895 if (!mono_runtime_is_shutting_down ()) {
3896 item->next = thread_static_info.freelist;
3897 thread_static_info.freelist = item;
3899 /* We could be called during shutdown after mono_thread_cleanup () is called */
3903 /* FIXME: free context static data as well */
3908 do_free_special (gpointer key, gpointer value, gpointer data)
3910 MonoClassField *field = key;
3911 guint32 offset = GPOINTER_TO_UINT (value);
3914 size = mono_type_size (field->type, &align);
3915 do_free_special_slot (offset, size);
3919 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3921 mono_threads_lock ();
3922 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3923 mono_threads_unlock ();
3927 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3929 mono_threads_lock ();
3930 do_free_special_slot (offset, size);
3931 mono_threads_unlock ();
3935 * allocates room in the thread local area for storing an instance of the struct type
3936 * the allocation is kept track of in domain->tlsrec_list.
3939 mono_thread_alloc_tls (MonoReflectionType *type)
3941 MonoDomain *domain = mono_domain_get ();
3943 MonoTlsDataRecord *tlsrec;
3946 gsize default_bitmap [4] = {0};
3947 uint32_t tls_offset;
3951 klass = mono_class_from_mono_type (type->type);
3952 /* TlsDatum is a struct, so we subtract the object header size offset */
3953 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3954 size = mono_type_size (type->type, &align);
3955 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3956 if (bitmap != default_bitmap)
3958 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3959 tlsrec->tls_offset = tls_offset;
3960 tlsrec->size = size;
3961 mono_domain_lock (domain);
3962 tlsrec->next = domain->tlsrec_list;
3963 domain->tlsrec_list = tlsrec;
3964 mono_domain_unlock (domain);
3969 mono_thread_destroy_tls (uint32_t tls_offset)
3971 MonoTlsDataRecord *prev = NULL;
3972 MonoTlsDataRecord *cur;
3974 MonoDomain *domain = mono_domain_get ();
3975 mono_domain_lock (domain);
3976 cur = domain->tlsrec_list;
3978 if (cur->tls_offset == tls_offset) {
3980 prev->next = cur->next;
3982 domain->tlsrec_list = cur->next;
3990 mono_domain_unlock (domain);
3992 mono_special_static_data_free_slot (tls_offset, size);
3996 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3999 mono_thread_destroy_domain_tls (MonoDomain *domain)
4001 while (domain->tlsrec_list)
4002 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4005 static MonoClassField *local_slots = NULL;
4008 /* local tls data to get locals_slot from a thread */
4011 /* index in the locals_slot array */
4016 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4018 LocalSlotID *sid = user_data;
4019 MonoInternalThread *thread = (MonoInternalThread*)value;
4020 MonoArray *slots_array;
4022 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4023 * it is for the right domain, so we need to check if it is allocated an initialized
4024 * for the current thread.
4026 /*g_print ("handling thread %p\n", thread);*/
4027 if (!thread->static_data || !thread->static_data [sid->idx])
4029 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4030 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4032 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4036 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4044 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4046 g_warning ("local_slots field not found in Thread class");
4050 domain = mono_domain_get ();
4051 mono_domain_lock (domain);
4052 if (domain->special_static_fields)
4053 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4054 mono_domain_unlock (domain);
4057 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4058 sid.offset = GPOINTER_TO_UINT (addr);
4059 sid.offset &= 0x7fffffff;
4060 sid.idx = (sid.offset >> 24) - 1;
4061 mono_threads_lock ();
4062 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4063 mono_threads_unlock ();
4065 /* FIXME: clear the slot for MonoAppContexts, too */
4070 static void CALLBACK dummy_apc (ULONG_PTR param)
4076 * mono_thread_execute_interruption
4078 * Performs the operation that the requested thread state requires (abort,
4081 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4083 LOCK_THREAD (thread);
4085 /* MonoThread::interruption_requested can only be changed with atomics */
4086 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4087 /* this will consume pending APC calls */
4089 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4091 InterlockedDecrement (&thread_interruption_requested);
4093 /* Clear the interrupted flag of the thread so it can wait again */
4094 wapi_clear_interruption ();
4098 if ((thread->state & ThreadState_AbortRequested) != 0) {
4099 UNLOCK_THREAD (thread);
4100 if (thread->abort_exc == NULL) {
4102 * This might be racy, but it has to be called outside the lock
4103 * since it calls managed code.
4105 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4107 return thread->abort_exc;
4109 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4110 self_suspend_internal (thread);
4113 else if ((thread->state & ThreadState_StopRequested) != 0) {
4114 /* FIXME: do this through the JIT? */
4116 UNLOCK_THREAD (thread);
4118 mono_thread_exit ();
4120 } else if (thread->pending_exception) {
4123 exc = thread->pending_exception;
4124 thread->pending_exception = NULL;
4126 UNLOCK_THREAD (thread);
4128 } else if (thread->thread_interrupt_requested) {
4130 thread->thread_interrupt_requested = FALSE;
4131 UNLOCK_THREAD (thread);
4133 return(mono_get_exception_thread_interrupted ());
4136 UNLOCK_THREAD (thread);
4142 * mono_thread_request_interruption
4144 * A signal handler can call this method to request the interruption of a
4145 * thread. The result of the interruption will depend on the current state of
4146 * the thread. If the result is an exception that needs to be throw, it is
4147 * provided as return value.
4150 mono_thread_request_interruption (gboolean running_managed)
4152 MonoInternalThread *thread = mono_thread_internal_current ();
4154 /* The thread may already be stopping */
4159 if (thread->interrupt_on_stop &&
4160 thread->state & ThreadState_StopRequested &&
4161 thread->state & ThreadState_Background)
4165 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4167 InterlockedIncrement (&thread_interruption_requested);
4169 if (!running_managed || is_running_protected_wrapper ()) {
4170 /* Can't stop while in unmanaged code. Increase the global interruption
4171 request count. When exiting the unmanaged method the count will be
4172 checked and the thread will be interrupted. */
4174 if (mono_thread_notify_pending_exc_fn && !running_managed)
4175 /* The JIT will notify the thread about the interruption */
4176 /* This shouldn't take any locks */
4177 mono_thread_notify_pending_exc_fn ();
4179 /* this will awake the thread if it is in WaitForSingleObject
4181 /* Our implementation of this function ignores the func argument */
4183 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4185 wapi_self_interrupt ();
4190 return mono_thread_execute_interruption (thread);
4194 /*This function should be called by a thread after it has exited all of
4195 * its handle blocks at interruption time.*/
4197 mono_thread_resume_interruption (void)
4199 MonoInternalThread *thread = mono_thread_internal_current ();
4200 gboolean still_aborting;
4202 /* The thread may already be stopping */
4206 LOCK_THREAD (thread);
4207 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4208 UNLOCK_THREAD (thread);
4210 /*This can happen if the protected block called Thread::ResetAbort*/
4211 if (!still_aborting)
4214 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4216 InterlockedIncrement (&thread_interruption_requested);
4219 wapi_self_interrupt ();
4221 return mono_thread_execute_interruption (thread);
4224 gboolean mono_thread_interruption_requested ()
4226 if (thread_interruption_requested) {
4227 MonoInternalThread *thread = mono_thread_internal_current ();
4228 /* The thread may already be stopping */
4230 return (thread->interruption_requested);
4235 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4237 MonoInternalThread *thread = mono_thread_internal_current ();
4239 /* The thread may already be stopping */
4243 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4244 MonoException* exc = mono_thread_execute_interruption (thread);
4245 if (exc) mono_raise_exception (exc);
4250 * Performs the interruption of the current thread, if one has been requested,
4251 * and the thread is not running a protected wrapper.
4253 void mono_thread_interruption_checkpoint ()
4255 mono_thread_interruption_checkpoint_request (FALSE);
4259 * Performs the interruption of the current thread, if one has been requested.
4261 void mono_thread_force_interruption_checkpoint ()
4263 mono_thread_interruption_checkpoint_request (TRUE);
4267 * mono_thread_get_and_clear_pending_exception:
4269 * Return any pending exceptions for the current thread and clear it as a side effect.
4272 mono_thread_get_and_clear_pending_exception (void)
4274 MonoInternalThread *thread = mono_thread_internal_current ();
4276 /* The thread may already be stopping */
4280 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4281 return mono_thread_execute_interruption (thread);
4284 if (thread->pending_exception) {
4285 MonoException *exc = thread->pending_exception;
4287 thread->pending_exception = NULL;
4295 * mono_set_pending_exception:
4297 * Set the pending exception of the current thread to EXC.
4298 * The exception will be thrown when execution returns to managed code.
4301 mono_set_pending_exception (MonoException *exc)
4303 MonoInternalThread *thread = mono_thread_internal_current ();
4305 /* The thread may already be stopping */
4309 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4311 mono_thread_request_interruption (FALSE);
4315 * mono_thread_interruption_request_flag:
4317 * Returns the address of a flag that will be non-zero if an interruption has
4318 * been requested for a thread. The thread to interrupt may not be the current
4319 * thread, so an additional call to mono_thread_interruption_requested() or
4320 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4323 gint32* mono_thread_interruption_request_flag ()
4325 return &thread_interruption_requested;
4329 mono_thread_init_apartment_state (void)
4332 MonoInternalThread* thread = mono_thread_internal_current ();
4334 /* Positive return value indicates success, either
4335 * S_OK if this is first CoInitialize call, or
4336 * S_FALSE if CoInitialize already called, but with same
4337 * threading model. A negative value indicates failure,
4338 * probably due to trying to change the threading model.
4340 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4341 ? COINIT_APARTMENTTHREADED
4342 : COINIT_MULTITHREADED) < 0) {
4343 thread->apartment_state = ThreadApartmentState_Unknown;
4349 mono_thread_cleanup_apartment_state (void)
4352 MonoInternalThread* thread = mono_thread_internal_current ();
4354 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4361 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4363 LOCK_THREAD (thread);
4364 thread->state |= state;
4365 UNLOCK_THREAD (thread);
4369 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4371 LOCK_THREAD (thread);
4372 thread->state &= ~state;
4373 UNLOCK_THREAD (thread);
4377 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4379 gboolean ret = FALSE;
4381 LOCK_THREAD (thread);
4383 if ((thread->state & test) != 0) {
4387 UNLOCK_THREAD (thread);
4392 //static MonoClassField *execution_context_field;
4395 get_execution_context_addr (void)
4397 MonoDomain *domain = mono_domain_get ();
4398 guint32 offset = domain->execution_context_field_offset;
4401 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4404 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4406 mono_domain_lock (domain);
4407 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4408 mono_domain_unlock (domain);
4411 domain->execution_context_field_offset = offset;
4414 return (MonoObject**) mono_get_special_static_data (offset);
4418 mono_thread_get_execution_context (void)
4420 return *get_execution_context_addr ();
4424 mono_thread_set_execution_context (MonoObject *ec)
4426 *get_execution_context_addr () = ec;
4429 static gboolean has_tls_get = FALSE;
4432 mono_runtime_set_has_tls_get (gboolean val)
4438 mono_runtime_has_tls_get (void)
4444 mono_thread_kill (MonoInternalThread *thread, int signal)
4446 #ifdef __native_client__
4447 /* Workaround pthread_kill abort() in NaCl glibc. */
4451 /* Win32 uses QueueUserAPC and callers of this are guarded */
4452 g_assert_not_reached ();
4454 # ifdef PTHREAD_POINTER_ID
4455 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4457 # ifdef PLATFORM_ANDROID
4458 if (thread->android_tid != 0) {
4460 int old_errno = errno;
4462 ret = tkill ((pid_t) thread->android_tid, signal);
4471 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4473 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4480 self_interrupt_thread (void *_unused)
4482 MonoThreadInfo *info = mono_thread_info_current ();
4483 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4484 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4485 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4486 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4490 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4494 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4498 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4500 MonoJitInfo **dest = data;
4506 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4508 MonoJitInfo *ji = NULL;
4511 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4516 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4519 MonoThreadInfo *info = NULL;
4520 gboolean protected_wrapper;
4521 gboolean running_managed;
4523 if (!mono_thread_info_new_interrupt_enabled ()) {
4524 signal_thread_state_change (thread);
4529 FIXME this is insanely broken, it doesn't cause interruption to happen
4530 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4532 if (thread == mono_thread_internal_current ()) {
4533 /* Do it synchronously */
4534 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4536 mono_raise_exception (exc);
4538 wapi_interrupt_thread (thread->handle);
4543 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4544 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4548 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4549 mono_thread_info_finish_suspend_and_resume (info);
4553 /*someone is already interrupting it*/
4554 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4555 mono_thread_info_finish_suspend_and_resume (info);
4558 InterlockedIncrement (&thread_interruption_requested);
4560 ji = mono_thread_info_get_last_managed (info);
4561 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4562 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4564 if (!protected_wrapper && running_managed) {
4565 /*We are in managed code*/
4566 /*Set the thread to call */
4567 if (install_async_abort)
4568 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4569 mono_thread_info_finish_suspend_and_resume (info);
4572 * This will cause waits to be broken.
4573 * It will also prevent the thread from entering a wait, so if the thread returns
4574 * from the wait before it receives the abort signal, it will just spin in the wait
4575 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4579 gpointer interrupt_handle;
4580 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4582 mono_thread_info_finish_suspend_and_resume (info);
4584 wapi_finish_interrupt_thread (interrupt_handle);
4587 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4591 transition_to_suspended (MonoInternalThread *thread, MonoThreadInfo *info)
4593 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4594 g_assert (0); /*FIXME we should not reach this */
4595 /*Make sure we balance the suspend count.*/
4597 mono_thread_info_finish_suspend_and_resume (info);
4599 thread->state &= ~ThreadState_SuspendRequested;
4600 thread->state |= ThreadState_Suspended;
4602 mono_thread_info_finish_suspend (info);
4604 UNLOCK_THREAD (thread);
4608 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4610 if (!mono_thread_info_new_interrupt_enabled ()) {
4611 signal_thread_state_change (thread);
4615 LOCK_THREAD (thread);
4616 if (thread == mono_thread_internal_current ()) {
4617 transition_to_suspended (thread, NULL);
4618 mono_thread_info_self_suspend ();
4620 MonoThreadInfo *info;
4622 gboolean protected_wrapper;
4623 gboolean running_managed;
4625 /*A null info usually means the thread is already dead. */
4626 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4627 UNLOCK_THREAD (thread);
4631 ji = mono_thread_info_get_last_managed (info);
4632 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4633 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4635 if (running_managed && !protected_wrapper) {
4636 transition_to_suspended (thread, info);
4639 gpointer interrupt_handle;
4642 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4643 InterlockedIncrement (&thread_interruption_requested);
4646 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4648 mono_thread_info_finish_suspend_and_resume (info);
4651 wapi_finish_interrupt_thread (interrupt_handle);
4653 UNLOCK_THREAD (thread);
4658 /*This is called with @thread synch_cs held and it must release it*/
4660 self_suspend_internal (MonoInternalThread *thread)
4662 if (!mono_thread_info_new_interrupt_enabled ()) {
4663 thread->state &= ~ThreadState_SuspendRequested;
4664 thread->state |= ThreadState_Suspended;
4665 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4666 if (thread->suspend_event == NULL) {
4667 UNLOCK_THREAD (thread);
4670 if (thread->suspended_event)
4671 SetEvent (thread->suspended_event);
4673 UNLOCK_THREAD (thread);
4675 if (shutting_down) {
4676 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4681 WaitForSingleObject (thread->suspend_event, INFINITE);
4683 LOCK_THREAD (thread);
4685 CloseHandle (thread->suspend_event);
4686 thread->suspend_event = NULL;
4687 thread->state &= ~ThreadState_Suspended;
4689 /* The thread that requested the resume will have replaced this event
4690 * and will be waiting for it
4692 SetEvent (thread->resume_event);
4694 UNLOCK_THREAD (thread);
4698 transition_to_suspended (thread, NULL);
4699 mono_thread_info_self_suspend ();
4702 /*This is called with @thread synch_cs held and it must release it*/
4704 resume_thread_internal (MonoInternalThread *thread)
4706 if (!mono_thread_info_new_interrupt_enabled ()) {
4707 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4708 if (thread->resume_event == NULL) {
4709 UNLOCK_THREAD (thread);
4713 /* Awake the thread */
4714 SetEvent (thread->suspend_event);
4716 UNLOCK_THREAD (thread);
4718 /* Wait for the thread to awake */
4719 WaitForSingleObject (thread->resume_event, INFINITE);
4720 CloseHandle (thread->resume_event);
4721 thread->resume_event = NULL;
4725 UNLOCK_THREAD (thread);
4726 /* Awake the thread */
4727 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4729 LOCK_THREAD (thread);
4730 thread->state &= ~ThreadState_Suspended;
4731 UNLOCK_THREAD (thread);
4737 * mono_thread_is_foreign:
4738 * @thread: the thread to query
4740 * This function allows one to determine if a thread was created by the mono runtime and has
4741 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4743 * Returns: true if @thread was not created by the runtime.
4746 mono_thread_is_foreign (MonoThread *thread)
4748 MonoThreadInfo *info = thread->internal_thread->thread_info;
4749 return info->runtime_thread == FALSE;
4753 * mono_add_joinable_thread:
4755 * Add TID to the list of joinable threads.
4756 * LOCKING: Acquires the threads lock.
4759 mono_threads_add_joinable_thread (gpointer tid)
4763 * We cannot detach from threads because it causes problems like
4764 * 2fd16f60/r114307. So we collect them and join them when
4765 * we have time (in he finalizer thread).
4767 joinable_threads_lock ();
4768 if (!joinable_threads)
4769 joinable_threads = g_hash_table_new (NULL, NULL);
4770 g_hash_table_insert (joinable_threads, tid, tid);
4771 joinable_thread_count ++;
4772 joinable_threads_unlock ();
4774 mono_gc_finalize_notify ();
4779 * mono_threads_join_threads:
4781 * Join all joinable threads. This is called from the finalizer thread.
4782 * LOCKING: Acquires the threads lock.
4785 mono_threads_join_threads (void)
4788 GHashTableIter iter;
4795 if (!joinable_thread_count)
4799 joinable_threads_lock ();
4801 if (g_hash_table_size (joinable_threads)) {
4802 g_hash_table_iter_init (&iter, joinable_threads);
4803 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4804 thread = (pthread_t)tid;
4805 g_hash_table_remove (joinable_threads, key);
4806 joinable_thread_count --;
4809 joinable_threads_unlock ();
4811 if (thread != pthread_self ())
4812 /* This shouldn't block */
4813 pthread_join (thread, NULL);
4824 * Wait for thread TID to exit.
4825 * LOCKING: Acquires the threads lock.
4828 mono_thread_join (gpointer tid)
4832 gboolean found = FALSE;
4834 joinable_threads_lock ();
4835 if (!joinable_threads)
4836 joinable_threads = g_hash_table_new (NULL, NULL);
4837 if (g_hash_table_lookup (joinable_threads, tid)) {
4838 g_hash_table_remove (joinable_threads, tid);
4839 joinable_thread_count --;
4842 joinable_threads_unlock ();
4845 thread = (pthread_t)tid;
4846 pthread_join (thread, NULL);