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 = (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 numhandles = mono_array_length(mono_handles);
1373 handles = g_new0(HANDLE, numhandles);
1375 for(i = 0; i < numhandles; i++) {
1376 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1377 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1384 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1386 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1388 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1392 if(ret==WAIT_FAILED) {
1393 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1395 } else if(ret==WAIT_TIMEOUT) {
1396 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1403 /* FIXME: exitContext isnt documented */
1404 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1406 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1410 MonoObject *waitHandle;
1411 MonoInternalThread *thread = mono_thread_internal_current ();
1413 /* Do this WaitSleepJoin check before creating objects */
1414 mono_thread_current_check_pending_interrupt ();
1416 numhandles = mono_array_length(mono_handles);
1417 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1420 for(i = 0; i < numhandles; i++) {
1421 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1422 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1429 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1431 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1433 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1435 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1438 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1440 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1441 return ret - WAIT_OBJECT_0;
1443 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1444 return ret - WAIT_ABANDONED_0;
1451 /* FIXME: exitContext isnt documented */
1452 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1455 MonoInternalThread *thread = mono_thread_internal_current ();
1457 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1463 mono_thread_current_check_pending_interrupt ();
1465 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1467 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1469 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1471 if(ret==WAIT_FAILED) {
1472 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1474 } else if(ret==WAIT_TIMEOUT) {
1475 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1483 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1486 MonoInternalThread *thread = mono_thread_internal_current ();
1491 mono_thread_current_check_pending_interrupt ();
1493 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1495 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1497 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1499 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1502 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1509 mutex = CreateMutex (NULL, owned, NULL);
1511 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1513 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1521 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1522 return(ReleaseMutex (handle));
1525 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1531 *error = ERROR_SUCCESS;
1533 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1535 *error = GetLastError ();
1542 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1549 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1551 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1552 mono_string_chars (name));
1554 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1562 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1566 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1571 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1575 *error = ERROR_SUCCESS;
1577 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1579 *error = GetLastError ();
1585 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1592 event = CreateEvent (NULL, manual, initial, NULL);
1594 event = CreateEvent (NULL, manual, initial,
1595 mono_string_chars (name));
1597 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1605 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1606 return (SetEvent(handle));
1609 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1610 return (ResetEvent(handle));
1614 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1615 CloseHandle (handle);
1618 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1624 *error = ERROR_SUCCESS;
1626 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1628 *error = GetLastError ();
1634 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1636 return InterlockedIncrement (location);
1639 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1641 #if SIZEOF_VOID_P == 4
1642 if (G_UNLIKELY ((size_t)location & 0x7)) {
1644 mono_interlocked_lock ();
1647 mono_interlocked_unlock ();
1651 return InterlockedIncrement64 (location);
1654 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1656 return InterlockedDecrement(location);
1659 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1661 #if SIZEOF_VOID_P == 4
1662 if (G_UNLIKELY ((size_t)location & 0x7)) {
1664 mono_interlocked_lock ();
1667 mono_interlocked_unlock ();
1671 return InterlockedDecrement64 (location);
1674 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1676 return InterlockedExchange(location, value);
1679 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1682 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1683 mono_gc_wbarrier_generic_nostore (location);
1687 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1689 return InterlockedExchangePointer(location, value);
1692 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1694 IntFloatUnion val, ret;
1697 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1703 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1705 #if SIZEOF_VOID_P == 4
1706 if (G_UNLIKELY ((size_t)location & 0x7)) {
1708 mono_interlocked_lock ();
1711 mono_interlocked_unlock ();
1715 return InterlockedExchange64 (location, value);
1719 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1721 LongDoubleUnion val, ret;
1724 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1729 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1731 return InterlockedCompareExchange(location, value, comparand);
1734 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1737 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1738 mono_gc_wbarrier_generic_nostore (location);
1742 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1744 return InterlockedCompareExchangePointer(location, value, comparand);
1747 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1749 IntFloatUnion val, ret, cmp;
1752 cmp.fval = comparand;
1753 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1759 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1761 #if SIZEOF_VOID_P == 8
1762 LongDoubleUnion val, comp, ret;
1765 comp.fval = comparand;
1766 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1772 mono_interlocked_lock ();
1774 if (old == comparand)
1776 mono_interlocked_unlock ();
1783 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1785 #if SIZEOF_VOID_P == 4
1786 if (G_UNLIKELY ((size_t)location & 0x7)) {
1788 mono_interlocked_lock ();
1790 if (old == comparand)
1792 mono_interlocked_unlock ();
1796 return InterlockedCompareExchange64 (location, value, comparand);
1800 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1803 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1804 mono_gc_wbarrier_generic_nostore (location);
1809 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1812 res = InterlockedExchangePointer ((gpointer *)location, value);
1813 mono_gc_wbarrier_generic_nostore (location);
1818 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1820 return InterlockedAdd (location, value);
1824 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1826 #if SIZEOF_VOID_P == 4
1827 if (G_UNLIKELY ((size_t)location & 0x7)) {
1829 mono_interlocked_lock ();
1832 mono_interlocked_unlock ();
1836 return InterlockedAdd64 (location, value);
1840 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1842 #if SIZEOF_VOID_P == 4
1843 if (G_UNLIKELY ((size_t)location & 0x7)) {
1845 mono_interlocked_lock ();
1847 mono_interlocked_unlock ();
1851 return InterlockedRead64 (location);
1855 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1857 mono_memory_barrier ();
1861 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1863 mono_thread_clr_state (this, state);
1865 if (state & ThreadState_Background) {
1866 /* If the thread changes the background mode, the main thread has to
1867 * be notified, since it has to rebuild the list of threads to
1870 SetEvent (background_change_event);
1875 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1877 mono_thread_set_state (this, state);
1879 if (state & ThreadState_Background) {
1880 /* If the thread changes the background mode, the main thread has to
1881 * be notified, since it has to rebuild the list of threads to
1884 SetEvent (background_change_event);
1889 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1895 state = this->state;
1897 UNLOCK_THREAD (this);
1902 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1904 MonoInternalThread *current;
1909 current = mono_thread_internal_current ();
1911 this->thread_interrupt_requested = TRUE;
1912 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1914 UNLOCK_THREAD (this);
1917 abort_thread_internal (this, TRUE, FALSE);
1921 void mono_thread_current_check_pending_interrupt ()
1923 MonoInternalThread *thread = mono_thread_internal_current ();
1924 gboolean throw = FALSE;
1926 LOCK_THREAD (thread);
1928 if (thread->thread_interrupt_requested) {
1930 thread->thread_interrupt_requested = FALSE;
1933 UNLOCK_THREAD (thread);
1936 mono_raise_exception (mono_get_exception_thread_interrupted ());
1941 mono_thread_get_abort_signal (void)
1945 #elif defined(PLATFORM_ANDROID)
1947 #elif !defined (SIGRTMIN)
1952 #endif /* SIGUSR1 */
1954 static int abort_signum = -1;
1956 if (abort_signum != -1)
1957 return abort_signum;
1958 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1959 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1960 struct sigaction sinfo;
1961 sigaction (i, NULL, &sinfo);
1962 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1967 /* fallback to the old way */
1969 #endif /* HOST_WIN32 */
1973 static void CALLBACK interruption_request_apc (ULONG_PTR param)
1975 MonoException* exc = mono_thread_request_interruption (FALSE);
1976 if (exc) mono_raise_exception (exc);
1978 #endif /* HOST_WIN32 */
1981 * signal_thread_state_change
1983 * Tells the thread that his state has changed and it has to enter the new
1984 * state as soon as possible.
1986 static void signal_thread_state_change (MonoInternalThread *thread)
1989 gpointer wait_handle;
1992 if (thread == mono_thread_internal_current ()) {
1993 /* Do it synchronously */
1994 MonoException *exc = mono_thread_request_interruption (FALSE);
1996 mono_raise_exception (exc);
2000 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2003 * This will cause waits to be broken.
2004 * It will also prevent the thread from entering a wait, so if the thread returns
2005 * from the wait before it receives the abort signal, it will just spin in the wait
2006 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2009 wait_handle = wapi_prepare_interrupt_thread (thread->handle);
2011 /* fixme: store the state somewhere */
2012 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2014 wapi_finish_interrupt_thread (wait_handle);
2015 #endif /* HOST_WIN32 */
2019 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2021 LOCK_THREAD (thread);
2023 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2024 (thread->state & ThreadState_StopRequested) != 0 ||
2025 (thread->state & ThreadState_Stopped) != 0)
2027 UNLOCK_THREAD (thread);
2031 if ((thread->state & ThreadState_Unstarted) != 0) {
2032 thread->state |= ThreadState_Aborted;
2033 UNLOCK_THREAD (thread);
2037 thread->state |= ThreadState_AbortRequested;
2038 if (thread->abort_state_handle)
2039 mono_gchandle_free (thread->abort_state_handle);
2041 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2042 g_assert (thread->abort_state_handle);
2044 thread->abort_state_handle = 0;
2046 thread->abort_exc = NULL;
2049 * abort_exc is set in mono_thread_execute_interruption(),
2050 * triggered by the call to signal_thread_state_change(),
2051 * below. There's a point between where we have
2052 * abort_state_handle set, but abort_exc NULL, but that's not
2056 UNLOCK_THREAD (thread);
2058 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2060 /* During shutdown, we can't wait for other threads */
2062 /* Make sure the thread is awake */
2063 mono_thread_resume (thread);
2065 abort_thread_internal (thread, TRUE, TRUE);
2069 ves_icall_System_Threading_Thread_ResetAbort (void)
2071 MonoInternalThread *thread = mono_thread_internal_current ();
2072 gboolean was_aborting;
2074 LOCK_THREAD (thread);
2075 was_aborting = thread->state & ThreadState_AbortRequested;
2076 thread->state &= ~ThreadState_AbortRequested;
2077 UNLOCK_THREAD (thread);
2079 if (!was_aborting) {
2080 const char *msg = "Unable to reset abort because no abort was requested";
2081 mono_raise_exception (mono_get_exception_thread_state (msg));
2083 thread->abort_exc = NULL;
2084 if (thread->abort_state_handle) {
2085 mono_gchandle_free (thread->abort_state_handle);
2086 /* This is actually not necessary - the handle
2087 only counts if the exception is set */
2088 thread->abort_state_handle = 0;
2093 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2095 LOCK_THREAD (thread);
2097 thread->state &= ~ThreadState_AbortRequested;
2099 if (thread->abort_exc) {
2100 thread->abort_exc = NULL;
2101 if (thread->abort_state_handle) {
2102 mono_gchandle_free (thread->abort_state_handle);
2103 /* This is actually not necessary - the handle
2104 only counts if the exception is set */
2105 thread->abort_state_handle = 0;
2109 UNLOCK_THREAD (thread);
2113 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2115 MonoInternalThread *thread = this->internal_thread;
2116 MonoObject *state, *deserialized = NULL, *exc;
2119 if (!thread->abort_state_handle)
2122 state = mono_gchandle_get_target (thread->abort_state_handle);
2125 domain = mono_domain_get ();
2126 if (mono_object_domain (state) == domain)
2129 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2131 if (!deserialized) {
2132 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2134 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2135 mono_raise_exception (invalid_op_exc);
2138 return deserialized;
2142 mono_thread_suspend (MonoInternalThread *thread)
2144 LOCK_THREAD (thread);
2146 if ((thread->state & ThreadState_Unstarted) != 0 ||
2147 (thread->state & ThreadState_Aborted) != 0 ||
2148 (thread->state & ThreadState_Stopped) != 0)
2150 UNLOCK_THREAD (thread);
2154 if ((thread->state & ThreadState_Suspended) != 0 ||
2155 (thread->state & ThreadState_SuspendRequested) != 0 ||
2156 (thread->state & ThreadState_StopRequested) != 0)
2158 UNLOCK_THREAD (thread);
2162 thread->state |= ThreadState_SuspendRequested;
2164 UNLOCK_THREAD (thread);
2166 suspend_thread_internal (thread, FALSE);
2171 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2173 if (!mono_thread_suspend (thread))
2174 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2178 mono_thread_resume (MonoInternalThread *thread)
2180 LOCK_THREAD (thread);
2182 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2183 thread->state &= ~ThreadState_SuspendRequested;
2184 UNLOCK_THREAD (thread);
2188 if ((thread->state & ThreadState_Suspended) == 0 ||
2189 (thread->state & ThreadState_Unstarted) != 0 ||
2190 (thread->state & ThreadState_Aborted) != 0 ||
2191 (thread->state & ThreadState_Stopped) != 0)
2193 UNLOCK_THREAD (thread);
2197 return resume_thread_internal (thread);
2201 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2203 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2204 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2208 mono_threads_is_critical_method (MonoMethod *method)
2210 switch (method->wrapper_type) {
2211 case MONO_WRAPPER_RUNTIME_INVOKE:
2212 case MONO_WRAPPER_XDOMAIN_INVOKE:
2213 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2220 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2225 if (mono_threads_is_critical_method (m)) {
2226 *((gboolean*)data) = TRUE;
2233 is_running_protected_wrapper (void)
2235 gboolean found = FALSE;
2236 mono_stack_walk (find_wrapper, &found);
2240 void mono_thread_internal_stop (MonoInternalThread *thread)
2242 LOCK_THREAD (thread);
2244 if ((thread->state & ThreadState_StopRequested) != 0 ||
2245 (thread->state & ThreadState_Stopped) != 0)
2247 UNLOCK_THREAD (thread);
2251 /* Make sure the thread is awake */
2252 mono_thread_resume (thread);
2254 thread->state |= ThreadState_StopRequested;
2255 thread->state &= ~ThreadState_AbortRequested;
2257 UNLOCK_THREAD (thread);
2259 abort_thread_internal (thread, TRUE, TRUE);
2262 void mono_thread_stop (MonoThread *thread)
2264 mono_thread_internal_stop (thread->internal_thread);
2268 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2271 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2276 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2279 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2284 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2287 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2292 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2295 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2300 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2303 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2304 return (void *) tmp;
2308 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2310 volatile MonoObject *tmp;
2311 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2312 return (MonoObject *) tmp;
2316 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2319 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2324 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2327 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2332 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2334 return InterlockedRead8 (ptr);
2338 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2340 return InterlockedRead16 (ptr);
2344 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2346 return InterlockedRead (ptr);
2350 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2352 #if SIZEOF_VOID_P == 4
2353 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2355 mono_interlocked_lock ();
2356 val = *(gint64*)ptr;
2357 mono_interlocked_unlock ();
2361 return InterlockedRead64 (ptr);
2365 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2367 return InterlockedReadPointer (ptr);
2371 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2375 #if SIZEOF_VOID_P == 4
2376 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2378 mono_interlocked_lock ();
2379 val = *(double*)ptr;
2380 mono_interlocked_unlock ();
2385 u.ival = InterlockedRead64 (ptr);
2391 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2395 u.ival = InterlockedRead (ptr);
2401 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2403 return InterlockedReadPointer (ptr);
2407 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2409 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2413 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2415 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2419 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2421 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2425 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2427 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2431 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2433 mono_atomic_store_release ((volatile void **) ptr, value);
2437 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2439 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2443 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2445 mono_atomic_store_release ((volatile double *) ptr, value);
2449 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2451 mono_atomic_store_release ((volatile float *) ptr, value);
2455 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2457 InterlockedWrite8 (ptr, value);
2461 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2463 InterlockedWrite16 (ptr, value);
2467 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2469 InterlockedWrite (ptr, value);
2473 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2475 #if SIZEOF_VOID_P == 4
2476 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2477 mono_interlocked_lock ();
2478 *(gint64*)ptr = value;
2479 mono_interlocked_unlock ();
2484 InterlockedWrite64 (ptr, value);
2488 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2490 InterlockedWritePointer (ptr, value);
2494 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2498 #if SIZEOF_VOID_P == 4
2499 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2500 mono_interlocked_lock ();
2501 *(double*)ptr = value;
2502 mono_interlocked_unlock ();
2509 InterlockedWrite64 (ptr, u.ival);
2513 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2519 InterlockedWrite (ptr, u.ival);
2523 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2525 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2529 mono_thread_init_tls (void)
2531 MONO_FAST_TLS_INIT (tls_current_object);
2532 mono_native_tls_alloc (¤t_object_key, NULL);
2535 void mono_thread_init (MonoThreadStartCB start_cb,
2536 MonoThreadAttachCB attach_cb)
2538 InitializeCriticalSection(&threads_mutex);
2539 InitializeCriticalSection(&interlocked_mutex);
2540 InitializeCriticalSection(&contexts_mutex);
2541 InitializeCriticalSection(&joinable_threads_mutex);
2543 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2544 g_assert(background_change_event != NULL);
2546 mono_init_static_data_info (&thread_static_info);
2547 mono_init_static_data_info (&context_static_info);
2549 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2551 mono_thread_start_cb = start_cb;
2552 mono_thread_attach_cb = attach_cb;
2554 /* Get a pseudo handle to the current process. This is just a
2555 * kludge so that wapi can build a process handle if needed.
2556 * As a pseudo handle is returned, we don't need to clean
2559 GetCurrentProcess ();
2562 void mono_thread_cleanup (void)
2564 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2565 MonoThreadInfo *info;
2567 /* The main thread must abandon any held mutexes (particularly
2568 * important for named mutexes as they are shared across
2569 * processes, see bug 74680.) This will happen when the
2570 * thread exits, but if it's not running in a subthread it
2571 * won't exit in time.
2573 info = mono_thread_info_current ();
2574 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2578 /* This stuff needs more testing, it seems one of these
2579 * critical sections can be locked when mono_thread_cleanup is
2582 DeleteCriticalSection (&threads_mutex);
2583 DeleteCriticalSection (&interlocked_mutex);
2584 DeleteCriticalSection (&contexts_mutex);
2585 DeleteCriticalSection (&delayed_free_table_mutex);
2586 DeleteCriticalSection (&small_id_mutex);
2587 CloseHandle (background_change_event);
2590 mono_native_tls_free (current_object_key);
2594 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2596 mono_thread_cleanup_fn = func;
2600 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2602 thread->internal_thread->manage_callback = func;
2605 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2607 mono_thread_notify_pending_exc_fn = func;
2611 static void print_tids (gpointer key, gpointer value, gpointer user)
2613 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2614 * sizeof(uint) and a cast to uint would overflow
2616 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2617 * print this as a pointer.
2619 g_message ("Waiting for: %p", key);
2624 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2625 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2629 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2633 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2635 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2637 if(ret==WAIT_FAILED) {
2638 /* See the comment in build_wait_tids() */
2639 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2643 for(i=0; i<wait->num; i++)
2644 CloseHandle (wait->handles[i]);
2646 if (ret == WAIT_TIMEOUT)
2649 for(i=0; i<wait->num; i++) {
2650 gsize tid = wait->threads[i]->tid;
2653 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2654 * it can still run io-layer etc. code. So wait for it to really exit.
2655 * FIXME: This won't join threads which are not in the joinable_hash yet.
2657 mono_thread_join ((gpointer)tid);
2659 mono_threads_lock ();
2660 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2661 /* This thread must have been killed, because
2662 * it hasn't cleaned itself up. (It's just
2663 * possible that the thread exited before the
2664 * parent thread had a chance to store the
2665 * handle, and now there is another pointer to
2666 * the already-exited thread stored. In this
2667 * case, we'll just get two
2668 * mono_profiler_thread_end() calls for the
2672 mono_threads_unlock ();
2673 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2674 thread_cleanup (wait->threads[i]);
2676 mono_threads_unlock ();
2681 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2683 guint32 i, ret, count;
2685 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2687 /* Add the thread state change event, so it wakes up if a thread changes
2688 * to background mode.
2691 if (count < MAXIMUM_WAIT_OBJECTS) {
2692 wait->handles [count] = background_change_event;
2696 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2698 if(ret==WAIT_FAILED) {
2699 /* See the comment in build_wait_tids() */
2700 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2704 for(i=0; i<wait->num; i++)
2705 CloseHandle (wait->handles[i]);
2707 if (ret == WAIT_TIMEOUT)
2710 if (ret < wait->num) {
2711 gsize tid = wait->threads[ret]->tid;
2712 mono_threads_lock ();
2713 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2714 /* See comment in wait_for_tids about thread cleanup */
2715 mono_threads_unlock ();
2716 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2717 thread_cleanup (wait->threads [ret]);
2719 mono_threads_unlock ();
2723 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2725 struct wait_data *wait=(struct wait_data *)user;
2727 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2729 MonoInternalThread *thread=(MonoInternalThread *)value;
2731 /* Ignore background threads, we abort them later */
2732 /* Do not lock here since it is not needed and the caller holds threads_lock */
2733 if (thread->state & ThreadState_Background) {
2734 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2735 return; /* just leave, ignore */
2738 if (mono_gc_is_finalizer_internal_thread (thread)) {
2739 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2743 if (thread == mono_thread_internal_current ()) {
2744 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2748 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2749 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2753 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2754 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2758 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2759 if (handle == NULL) {
2760 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2764 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2765 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2766 wait->handles[wait->num]=handle;
2767 wait->threads[wait->num]=thread;
2770 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2772 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2777 /* Just ignore the rest, we can't do anything with
2784 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2786 struct wait_data *wait=(struct wait_data *)user;
2787 gsize self = GetCurrentThreadId ();
2788 MonoInternalThread *thread = value;
2791 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2794 /* The finalizer thread is not a background thread */
2795 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2796 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2798 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2802 /* printf ("A: %d\n", wait->num); */
2803 wait->handles[wait->num]=thread->handle;
2804 wait->threads[wait->num]=thread;
2807 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2808 mono_thread_internal_stop (thread);
2812 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2816 * mono_threads_set_shutting_down:
2818 * Is called by a thread that wants to shut down Mono. If the runtime is already
2819 * shutting down, the calling thread is suspended/stopped, and this function never
2823 mono_threads_set_shutting_down (void)
2825 MonoInternalThread *current_thread = mono_thread_internal_current ();
2827 mono_threads_lock ();
2829 if (shutting_down) {
2830 mono_threads_unlock ();
2832 /* Make sure we're properly suspended/stopped */
2834 LOCK_THREAD (current_thread);
2836 if ((current_thread->state & ThreadState_SuspendRequested) ||
2837 (current_thread->state & ThreadState_AbortRequested) ||
2838 (current_thread->state & ThreadState_StopRequested)) {
2839 UNLOCK_THREAD (current_thread);
2840 mono_thread_execute_interruption (current_thread);
2842 current_thread->state |= ThreadState_Stopped;
2843 UNLOCK_THREAD (current_thread);
2846 /*since we're killing the thread, unset the current domain.*/
2847 mono_domain_unset ();
2849 /* Wake up other threads potentially waiting for us */
2850 mono_thread_info_exit ();
2852 shutting_down = TRUE;
2854 /* Not really a background state change, but this will
2855 * interrupt the main thread if it is waiting for all
2856 * the other threads.
2858 SetEvent (background_change_event);
2860 mono_threads_unlock ();
2864 void mono_thread_manage (void)
2866 struct wait_data wait_data;
2867 struct wait_data *wait = &wait_data;
2869 memset (wait, 0, sizeof (struct wait_data));
2870 /* join each thread that's still running */
2871 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2873 mono_threads_lock ();
2875 THREAD_DEBUG (g_message("%s: No threads", __func__));
2876 mono_threads_unlock ();
2879 mono_threads_unlock ();
2882 mono_threads_lock ();
2883 if (shutting_down) {
2884 /* somebody else is shutting down */
2885 mono_threads_unlock ();
2888 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2889 mono_g_hash_table_foreach (threads, print_tids, NULL));
2891 ResetEvent (background_change_event);
2893 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2894 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2895 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2896 mono_threads_unlock ();
2898 /* Something to wait for */
2899 wait_for_tids_or_state_change (wait, INFINITE);
2901 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2902 } while(wait->num>0);
2904 /* Mono is shutting down, so just wait for the end */
2905 if (!mono_runtime_try_shutdown ()) {
2906 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2907 mono_thread_suspend (mono_thread_internal_current ());
2908 mono_thread_execute_interruption (mono_thread_internal_current ());
2912 * Remove everything but the finalizer thread and self.
2913 * Also abort all the background threads
2916 mono_threads_lock ();
2919 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2920 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2921 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2923 mono_threads_unlock ();
2925 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2927 /* Something to wait for */
2928 wait_for_tids (wait, INFINITE);
2930 } while (wait->num > 0);
2933 * give the subthreads a chance to really quit (this is mainly needed
2934 * to get correct user and system times from getrusage/wait/time(1)).
2935 * This could be removed if we avoid pthread_detach() and use pthread_join().
2938 mono_thread_info_yield ();
2942 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2944 MonoInternalThread *thread=(MonoInternalThread *)value;
2946 if(thread->tid != (gsize)user) {
2947 /*TerminateThread (thread->handle, -1);*/
2951 void mono_thread_abort_all_other_threads (void)
2953 gsize self = GetCurrentThreadId ();
2955 mono_threads_lock ();
2956 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2957 mono_g_hash_table_size (threads));
2958 mono_g_hash_table_foreach (threads, print_tids, NULL));
2960 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2962 mono_threads_unlock ();
2966 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2968 MonoInternalThread *thread = (MonoInternalThread*)value;
2969 struct wait_data *wait = (struct wait_data*)user_data;
2973 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2975 * This needs no locking.
2977 if ((thread->state & ThreadState_Suspended) != 0 ||
2978 (thread->state & ThreadState_Stopped) != 0)
2981 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2982 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2986 wait->handles [wait->num] = handle;
2987 wait->threads [wait->num] = thread;
2993 * mono_thread_suspend_all_other_threads:
2995 * Suspend all managed threads except the finalizer thread and this thread. It is
2996 * not possible to resume them later.
2998 void mono_thread_suspend_all_other_threads (void)
3000 struct wait_data wait_data;
3001 struct wait_data *wait = &wait_data;
3003 gsize self = GetCurrentThreadId ();
3005 guint32 eventidx = 0;
3006 gboolean starting, finished;
3008 memset (wait, 0, sizeof (struct wait_data));
3010 * The other threads could be in an arbitrary state at this point, i.e.
3011 * they could be starting up, shutting down etc. This means that there could be
3012 * threads which are not even in the threads hash table yet.
3016 * First we set a barrier which will be checked by all threads before they
3017 * are added to the threads hash table, and they will exit if the flag is set.
3018 * This ensures that no threads could be added to the hash later.
3019 * We will use shutting_down as the barrier for now.
3021 g_assert (shutting_down);
3024 * We make multiple calls to WaitForMultipleObjects since:
3025 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3026 * - some threads could exit without becoming suspended
3031 * Make a copy of the hashtable since we can't do anything with
3032 * threads while threads_mutex is held.
3035 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3036 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3037 mono_threads_lock ();
3038 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3039 mono_threads_unlock ();
3041 events = g_new0 (gpointer, wait->num);
3043 /* Get the suspended events that we'll be waiting for */
3044 for (i = 0; i < wait->num; ++i) {
3045 MonoInternalThread *thread = wait->threads [i];
3046 gboolean signal_suspend = FALSE;
3048 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3049 //CloseHandle (wait->handles [i]);
3050 wait->threads [i] = NULL; /* ignore this thread in next loop */
3054 LOCK_THREAD (thread);
3056 if (thread->suspended_event == NULL) {
3057 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3058 if (thread->suspended_event == NULL) {
3059 /* Forget this one and go on to the next */
3060 UNLOCK_THREAD (thread);
3065 if ((thread->state & ThreadState_Suspended) != 0 ||
3066 (thread->state & ThreadState_StopRequested) != 0 ||
3067 (thread->state & ThreadState_Stopped) != 0) {
3068 UNLOCK_THREAD (thread);
3069 CloseHandle (wait->handles [i]);
3070 wait->threads [i] = NULL; /* ignore this thread in next loop */
3074 if ((thread->state & ThreadState_SuspendRequested) == 0)
3075 signal_suspend = TRUE;
3077 events [eventidx++] = thread->suspended_event;
3079 /* Convert abort requests into suspend requests */
3080 if ((thread->state & ThreadState_AbortRequested) != 0)
3081 thread->state &= ~ThreadState_AbortRequested;
3083 thread->state |= ThreadState_SuspendRequested;
3085 UNLOCK_THREAD (thread);
3087 /* Signal the thread to suspend */
3088 if (mono_thread_info_new_interrupt_enabled ())
3089 suspend_thread_internal (thread, TRUE);
3090 else if (signal_suspend)
3091 signal_thread_state_change (thread);
3094 /*Only wait on the suspend event if we are using the old path */
3095 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3096 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3097 for (i = 0; i < wait->num; ++i) {
3098 MonoInternalThread *thread = wait->threads [i];
3103 LOCK_THREAD (thread);
3104 if ((thread->state & ThreadState_Suspended) != 0) {
3105 CloseHandle (thread->suspended_event);
3106 thread->suspended_event = NULL;
3108 UNLOCK_THREAD (thread);
3112 if (eventidx <= 0) {
3114 * If there are threads which are starting up, we wait until they
3115 * are suspended when they try to register in the threads hash.
3116 * This is guaranteed to finish, since the threads which can create new
3117 * threads get suspended after a while.
3118 * FIXME: The finalizer thread can still create new threads.
3120 mono_threads_lock ();
3121 if (threads_starting_up)
3122 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3125 mono_threads_unlock ();
3137 collect_threads (gpointer key, gpointer value, gpointer user_data)
3139 MonoInternalThread *thread = (MonoInternalThread*)value;
3140 struct wait_data *wait = (struct wait_data*)user_data;
3143 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3144 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3148 wait->handles [wait->num] = handle;
3149 wait->threads [wait->num] = thread;
3154 static gboolean thread_dump_requested;
3156 static G_GNUC_UNUSED gboolean
3157 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3159 GString *p = (GString*)data;
3160 MonoMethod *method = NULL;
3162 method = mono_jit_info_get_method (frame->ji);
3165 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3166 g_string_append_printf (p, " %s\n", location);
3169 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3175 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3177 GString* text = g_string_new (0);
3179 GError *error = NULL;
3182 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3184 g_string_append_printf (text, "\n\"%s\"", name);
3187 else if (thread->threadpool_thread)
3188 g_string_append (text, "\n\"<threadpool thread>\"");
3190 g_string_append (text, "\n\"<unnamed thread>\"");
3193 /* This no longer works with remote unwinding */
3195 wapi_desc = wapi_current_thread_desc ();
3196 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3201 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3202 mono_thread_info_finish_suspend_and_resume (info);
3204 fprintf (stdout, "%s", text->str);
3206 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3207 OutputDebugStringA(text->str);
3210 g_string_free (text, TRUE);
3215 dump_thread (gpointer key, gpointer value, gpointer user)
3217 MonoInternalThread *thread = (MonoInternalThread *)value;
3218 MonoThreadInfo *info;
3220 if (thread == mono_thread_internal_current ())
3224 FIXME This still can hang if we stop a thread during malloc.
3225 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3226 that takes a callback and runs it with the target suspended.
3227 We probably should loop a bit around trying to get it to either managed code
3230 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3235 print_thread_dump (thread, info);
3239 mono_threads_perform_thread_dump (void)
3241 if (!thread_dump_requested)
3244 printf ("Full thread dump:\n");
3247 * Make a copy of the hashtable since we can't do anything with
3248 * threads while threads_mutex is held.
3250 mono_threads_lock ();
3251 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3252 mono_threads_unlock ();
3254 thread_dump_requested = FALSE;
3258 * mono_threads_request_thread_dump:
3260 * Ask all threads except the current to print their stacktrace to stdout.
3263 mono_threads_request_thread_dump (void)
3265 struct wait_data wait_data;
3266 struct wait_data *wait = &wait_data;
3269 /*The new thread dump code runs out of the finalizer thread. */
3270 if (mono_thread_info_new_interrupt_enabled ()) {
3271 thread_dump_requested = TRUE;
3272 mono_gc_finalize_notify ();
3277 memset (wait, 0, sizeof (struct wait_data));
3280 * Make a copy of the hashtable since we can't do anything with
3281 * threads while threads_mutex is held.
3283 mono_threads_lock ();
3284 mono_g_hash_table_foreach (threads, collect_threads, wait);
3285 mono_threads_unlock ();
3287 for (i = 0; i < wait->num; ++i) {
3288 MonoInternalThread *thread = wait->threads [i];
3290 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3291 (thread != mono_thread_internal_current ()) &&
3292 !thread->thread_dump_requested) {
3293 thread->thread_dump_requested = TRUE;
3295 signal_thread_state_change (thread);
3298 CloseHandle (wait->handles [i]);
3304 gint allocated; /* +1 so that refs [allocated] == NULL */
3308 typedef struct ref_stack RefStack;
3311 ref_stack_new (gint initial_size)
3315 initial_size = MAX (initial_size, 16) + 1;
3316 rs = g_new0 (RefStack, 1);
3317 rs->refs = g_new0 (gpointer, initial_size);
3318 rs->allocated = initial_size;
3323 ref_stack_destroy (gpointer ptr)
3334 ref_stack_push (RefStack *rs, gpointer ptr)
3336 g_assert (rs != NULL);
3338 if (rs->bottom >= rs->allocated) {
3339 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3340 rs->allocated <<= 1;
3341 rs->refs [rs->allocated] = NULL;
3343 rs->refs [rs->bottom++] = ptr;
3347 ref_stack_pop (RefStack *rs)
3349 if (rs == NULL || rs->bottom == 0)
3353 rs->refs [rs->bottom] = NULL;
3357 ref_stack_find (RefStack *rs, gpointer ptr)
3364 for (refs = rs->refs; refs && *refs; refs++) {
3372 * mono_thread_push_appdomain_ref:
3374 * Register that the current thread may have references to objects in domain
3375 * @domain on its stack. Each call to this function should be paired with a
3376 * call to pop_appdomain_ref.
3379 mono_thread_push_appdomain_ref (MonoDomain *domain)
3381 MonoInternalThread *thread = mono_thread_internal_current ();
3384 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3385 SPIN_LOCK (thread->lock_thread_id);
3386 if (thread->appdomain_refs == NULL)
3387 thread->appdomain_refs = ref_stack_new (16);
3388 ref_stack_push (thread->appdomain_refs, domain);
3389 SPIN_UNLOCK (thread->lock_thread_id);
3394 mono_thread_pop_appdomain_ref (void)
3396 MonoInternalThread *thread = mono_thread_internal_current ();
3399 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3400 SPIN_LOCK (thread->lock_thread_id);
3401 ref_stack_pop (thread->appdomain_refs);
3402 SPIN_UNLOCK (thread->lock_thread_id);
3407 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3410 SPIN_LOCK (thread->lock_thread_id);
3411 res = ref_stack_find (thread->appdomain_refs, domain);
3412 SPIN_UNLOCK (thread->lock_thread_id);
3417 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3419 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3422 typedef struct abort_appdomain_data {
3423 struct wait_data wait;
3425 } abort_appdomain_data;
3428 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3430 MonoInternalThread *thread = (MonoInternalThread*)value;
3431 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3432 MonoDomain *domain = data->domain;
3434 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3435 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3437 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3438 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3441 data->wait.handles [data->wait.num] = handle;
3442 data->wait.threads [data->wait.num] = thread;
3445 /* Just ignore the rest, we can't do anything with
3453 * mono_threads_abort_appdomain_threads:
3455 * Abort threads which has references to the given appdomain.
3458 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3460 #ifdef __native_client__
3464 abort_appdomain_data user_data;
3466 int orig_timeout = timeout;
3469 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3471 start_time = mono_msec_ticks ();
3473 mono_threads_lock ();
3475 user_data.domain = domain;
3476 user_data.wait.num = 0;
3477 /* This shouldn't take any locks */
3478 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3479 mono_threads_unlock ();
3481 if (user_data.wait.num > 0) {
3482 /* Abort the threads outside the threads lock */
3483 for (i = 0; i < user_data.wait.num; ++i)
3484 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3487 * We should wait for the threads either to abort, or to leave the
3488 * domain. We can't do the latter, so we wait with a timeout.
3490 wait_for_tids (&user_data.wait, 100);
3493 /* Update remaining time */
3494 timeout -= mono_msec_ticks () - start_time;
3495 start_time = mono_msec_ticks ();
3497 if (orig_timeout != -1 && timeout < 0)
3500 while (user_data.wait.num > 0);
3502 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3508 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3510 MonoInternalThread *thread = (MonoInternalThread*)value;
3511 MonoDomain *domain = (MonoDomain*)user_data;
3514 /* No locking needed here */
3515 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3517 if (thread->cached_culture_info) {
3518 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3519 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3520 if (obj && obj->vtable->domain == domain)
3521 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3527 * mono_threads_clear_cached_culture:
3529 * Clear the cached_current_culture from all threads if it is in the
3533 mono_threads_clear_cached_culture (MonoDomain *domain)
3535 mono_threads_lock ();
3536 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3537 mono_threads_unlock ();
3541 * mono_thread_get_undeniable_exception:
3543 * Return an exception which needs to be raised when leaving a catch clause.
3544 * This is used for undeniable exception propagation.
3547 mono_thread_get_undeniable_exception (void)
3549 MonoInternalThread *thread = mono_thread_internal_current ();
3551 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3553 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3554 * exception if the thread no longer references a dying appdomain.
3556 thread->abort_exc->trace_ips = NULL;
3557 thread->abort_exc->stack_trace = NULL;
3558 return thread->abort_exc;
3564 #if MONO_SMALL_CONFIG
3565 #define NUM_STATIC_DATA_IDX 4
3566 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3570 #define NUM_STATIC_DATA_IDX 8
3571 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3572 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3576 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3579 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3582 gpointer *static_data = addr;
3583 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3586 if (!static_data [i])
3588 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3589 ptr = static_data [i];
3590 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3591 uintptr_t bmap = static_reference_bitmaps [i][j];
3594 if ((bmap & 1) && *p) {
3605 * mono_alloc_static_data
3607 * Allocate memory blocks for storing threads or context static data
3610 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3612 guint idx = (offset >> 24) - 1;
3615 gpointer* static_data = *static_data_ptr;
3617 static void* tls_desc = NULL;
3618 if (mono_gc_user_markers_supported () && !tls_desc)
3619 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3620 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3621 *static_data_ptr = static_data;
3622 static_data [0] = static_data;
3625 for (i = 1; i <= idx; ++i) {
3626 if (static_data [i])
3628 if (mono_gc_user_markers_supported () && threadlocal)
3629 static_data [i] = g_malloc0 (static_data_size [i]);
3631 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3636 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3639 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3640 gpointer p = static_data [i];
3644 * At this point, the static data pointer array is still registered with the
3645 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3646 * data. Freeing the individual arrays without first nulling their slots
3647 * would make it possible for mark_tls_slots() to encounter a pointer to
3648 * such an already freed array. See bug #13813.
3650 static_data [i] = NULL;
3651 mono_memory_write_barrier ();
3652 if (mono_gc_user_markers_supported () && threadlocal)
3655 mono_gc_free_fixed (p);
3657 mono_gc_free_fixed (static_data);
3661 * mono_init_static_data_info
3663 * Initializes static data counters
3665 static void mono_init_static_data_info (StaticDataInfo *static_data)
3667 static_data->idx = 0;
3668 static_data->offset = 0;
3669 static_data->freelist = NULL;
3673 * mono_alloc_static_data_slot
3675 * Generates an offset for static data. static_data contains the counters
3676 * used to generate it.
3679 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3683 if (!static_data->idx && !static_data->offset) {
3685 * we use the first chunk of the first allocation also as
3686 * an array for the rest of the data
3688 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3690 static_data->offset += align - 1;
3691 static_data->offset &= ~(align - 1);
3692 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3693 static_data->idx ++;
3694 g_assert (size <= static_data_size [static_data->idx]);
3695 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3696 static_data->offset = 0;
3698 offset = static_data->offset | ((static_data->idx + 1) << 24);
3699 static_data->offset += size;
3704 * ensure thread static fields already allocated are valid for thread
3705 * This function is called when a thread is created or on thread attach.
3708 thread_adjust_static_data (MonoInternalThread *thread)
3712 mono_threads_lock ();
3713 if (thread_static_info.offset || thread_static_info.idx > 0) {
3714 /* get the current allocated size */
3715 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3716 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3718 mono_threads_unlock ();
3722 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3724 MonoInternalThread *thread = value;
3725 guint32 offset = GPOINTER_TO_UINT (user);
3727 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3730 static MonoThreadDomainTls*
3731 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3733 MonoThreadDomainTls* prev = NULL;
3734 MonoThreadDomainTls* tmp = static_data->freelist;
3736 if (tmp->size == size) {
3738 prev->next = tmp->next;
3740 static_data->freelist = tmp->next;
3750 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3753 int idx = (offset >> 24) - 1;
3755 if (!static_reference_bitmaps [idx])
3756 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3757 rb = static_reference_bitmaps [idx];
3759 offset /= sizeof (gpointer);
3760 /* offset is now the bitmap offset */
3761 for (i = 0; i < numbits; ++i) {
3762 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3763 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3768 clear_reference_bitmap (guint32 offset, guint32 size)
3770 int idx = (offset >> 24) - 1;
3772 rb = static_reference_bitmaps [idx];
3774 offset /= sizeof (gpointer);
3775 size /= sizeof (gpointer);
3777 /* offset is now the bitmap offset */
3778 for (; offset < size; ++offset)
3779 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3783 * The offset for a special static variable is composed of three parts:
3784 * a bit that indicates the type of static data (0:thread, 1:context),
3785 * an index in the array of chunks of memory for the thread (thread->static_data)
3786 * and an offset in that chunk of mem. This allows allocating less memory in the
3791 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3794 if (static_type == SPECIAL_STATIC_THREAD) {
3795 MonoThreadDomainTls *item;
3796 mono_threads_lock ();
3797 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3798 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3800 offset = item->offset;
3803 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3805 update_tls_reference_bitmap (offset, bitmap, numbits);
3806 /* This can be called during startup */
3807 if (threads != NULL)
3808 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3809 mono_threads_unlock ();
3811 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3812 mono_contexts_lock ();
3813 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3814 mono_contexts_unlock ();
3815 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3821 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3823 /* The high bit means either thread (0) or static (1) data. */
3825 guint32 static_type = (offset & 0x80000000);
3828 offset &= 0x7fffffff;
3829 idx = (offset >> 24) - 1;
3831 if (static_type == 0) {
3832 return get_thread_static_data (thread, offset);
3834 /* Allocate static data block under demand, since we don't have a list
3837 MonoAppContext *context = mono_context_get ();
3838 if (!context->static_data || !context->static_data [idx]) {
3839 mono_contexts_lock ();
3840 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3841 mono_contexts_unlock ();
3843 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3848 mono_get_special_static_data (guint32 offset)
3850 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3859 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3861 MonoInternalThread *thread = value;
3862 TlsOffsetSize *data = user;
3863 int idx = (data->offset >> 24) - 1;
3866 if (!thread->static_data || !thread->static_data [idx])
3868 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3869 mono_gc_bzero_atomic (ptr, data->size);
3873 do_free_special_slot (guint32 offset, guint32 size)
3875 guint32 static_type = (offset & 0x80000000);
3876 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3877 if (static_type == 0) {
3879 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3880 data.offset = offset & 0x7fffffff;
3882 clear_reference_bitmap (data.offset, data.size);
3883 if (threads != NULL)
3884 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3885 item->offset = offset;
3888 if (!mono_runtime_is_shutting_down ()) {
3889 item->next = thread_static_info.freelist;
3890 thread_static_info.freelist = item;
3892 /* We could be called during shutdown after mono_thread_cleanup () is called */
3896 /* FIXME: free context static data as well */
3901 do_free_special (gpointer key, gpointer value, gpointer data)
3903 MonoClassField *field = key;
3904 guint32 offset = GPOINTER_TO_UINT (value);
3907 size = mono_type_size (field->type, &align);
3908 do_free_special_slot (offset, size);
3912 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3914 mono_threads_lock ();
3915 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3916 mono_threads_unlock ();
3920 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3922 mono_threads_lock ();
3923 do_free_special_slot (offset, size);
3924 mono_threads_unlock ();
3928 * allocates room in the thread local area for storing an instance of the struct type
3929 * the allocation is kept track of in domain->tlsrec_list.
3932 mono_thread_alloc_tls (MonoReflectionType *type)
3934 MonoDomain *domain = mono_domain_get ();
3936 MonoTlsDataRecord *tlsrec;
3939 gsize default_bitmap [4] = {0};
3940 uint32_t tls_offset;
3944 klass = mono_class_from_mono_type (type->type);
3945 /* TlsDatum is a struct, so we subtract the object header size offset */
3946 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3947 size = mono_type_size (type->type, &align);
3948 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3949 if (bitmap != default_bitmap)
3951 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3952 tlsrec->tls_offset = tls_offset;
3953 tlsrec->size = size;
3954 mono_domain_lock (domain);
3955 tlsrec->next = domain->tlsrec_list;
3956 domain->tlsrec_list = tlsrec;
3957 mono_domain_unlock (domain);
3962 mono_thread_destroy_tls (uint32_t tls_offset)
3964 MonoTlsDataRecord *prev = NULL;
3965 MonoTlsDataRecord *cur;
3967 MonoDomain *domain = mono_domain_get ();
3968 mono_domain_lock (domain);
3969 cur = domain->tlsrec_list;
3971 if (cur->tls_offset == tls_offset) {
3973 prev->next = cur->next;
3975 domain->tlsrec_list = cur->next;
3983 mono_domain_unlock (domain);
3985 mono_special_static_data_free_slot (tls_offset, size);
3989 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3992 mono_thread_destroy_domain_tls (MonoDomain *domain)
3994 while (domain->tlsrec_list)
3995 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3998 static MonoClassField *local_slots = NULL;
4001 /* local tls data to get locals_slot from a thread */
4004 /* index in the locals_slot array */
4009 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4011 LocalSlotID *sid = user_data;
4012 MonoInternalThread *thread = (MonoInternalThread*)value;
4013 MonoArray *slots_array;
4015 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4016 * it is for the right domain, so we need to check if it is allocated an initialized
4017 * for the current thread.
4019 /*g_print ("handling thread %p\n", thread);*/
4020 if (!thread->static_data || !thread->static_data [sid->idx])
4022 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4023 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4025 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4029 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4037 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4039 g_warning ("local_slots field not found in Thread class");
4043 domain = mono_domain_get ();
4044 mono_domain_lock (domain);
4045 if (domain->special_static_fields)
4046 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4047 mono_domain_unlock (domain);
4050 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4051 sid.offset = GPOINTER_TO_UINT (addr);
4052 sid.offset &= 0x7fffffff;
4053 sid.idx = (sid.offset >> 24) - 1;
4054 mono_threads_lock ();
4055 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4056 mono_threads_unlock ();
4058 /* FIXME: clear the slot for MonoAppContexts, too */
4063 static void CALLBACK dummy_apc (ULONG_PTR param)
4069 * mono_thread_execute_interruption
4071 * Performs the operation that the requested thread state requires (abort,
4074 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4076 LOCK_THREAD (thread);
4078 /* MonoThread::interruption_requested can only be changed with atomics */
4079 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4080 /* this will consume pending APC calls */
4082 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4084 InterlockedDecrement (&thread_interruption_requested);
4086 /* Clear the interrupted flag of the thread so it can wait again */
4087 wapi_clear_interruption ();
4091 if ((thread->state & ThreadState_AbortRequested) != 0) {
4092 UNLOCK_THREAD (thread);
4093 if (thread->abort_exc == NULL) {
4095 * This might be racy, but it has to be called outside the lock
4096 * since it calls managed code.
4098 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4100 return thread->abort_exc;
4102 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4103 self_suspend_internal (thread);
4106 else if ((thread->state & ThreadState_StopRequested) != 0) {
4107 /* FIXME: do this through the JIT? */
4109 UNLOCK_THREAD (thread);
4111 mono_thread_exit ();
4113 } else if (thread->pending_exception) {
4116 exc = thread->pending_exception;
4117 thread->pending_exception = NULL;
4119 UNLOCK_THREAD (thread);
4121 } else if (thread->thread_interrupt_requested) {
4123 thread->thread_interrupt_requested = FALSE;
4124 UNLOCK_THREAD (thread);
4126 return(mono_get_exception_thread_interrupted ());
4129 UNLOCK_THREAD (thread);
4135 * mono_thread_request_interruption
4137 * A signal handler can call this method to request the interruption of a
4138 * thread. The result of the interruption will depend on the current state of
4139 * the thread. If the result is an exception that needs to be throw, it is
4140 * provided as return value.
4143 mono_thread_request_interruption (gboolean running_managed)
4145 MonoInternalThread *thread = mono_thread_internal_current ();
4147 /* The thread may already be stopping */
4152 if (thread->interrupt_on_stop &&
4153 thread->state & ThreadState_StopRequested &&
4154 thread->state & ThreadState_Background)
4158 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4160 InterlockedIncrement (&thread_interruption_requested);
4162 if (!running_managed || is_running_protected_wrapper ()) {
4163 /* Can't stop while in unmanaged code. Increase the global interruption
4164 request count. When exiting the unmanaged method the count will be
4165 checked and the thread will be interrupted. */
4167 if (mono_thread_notify_pending_exc_fn && !running_managed)
4168 /* The JIT will notify the thread about the interruption */
4169 /* This shouldn't take any locks */
4170 mono_thread_notify_pending_exc_fn ();
4172 /* this will awake the thread if it is in WaitForSingleObject
4174 /* Our implementation of this function ignores the func argument */
4176 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4178 wapi_self_interrupt ();
4183 return mono_thread_execute_interruption (thread);
4187 /*This function should be called by a thread after it has exited all of
4188 * its handle blocks at interruption time.*/
4190 mono_thread_resume_interruption (void)
4192 MonoInternalThread *thread = mono_thread_internal_current ();
4193 gboolean still_aborting;
4195 /* The thread may already be stopping */
4199 LOCK_THREAD (thread);
4200 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4201 UNLOCK_THREAD (thread);
4203 /*This can happen if the protected block called Thread::ResetAbort*/
4204 if (!still_aborting)
4207 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4209 InterlockedIncrement (&thread_interruption_requested);
4212 wapi_self_interrupt ();
4214 return mono_thread_execute_interruption (thread);
4217 gboolean mono_thread_interruption_requested ()
4219 if (thread_interruption_requested) {
4220 MonoInternalThread *thread = mono_thread_internal_current ();
4221 /* The thread may already be stopping */
4223 return (thread->interruption_requested);
4228 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4230 MonoInternalThread *thread = mono_thread_internal_current ();
4232 /* The thread may already be stopping */
4236 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4237 MonoException* exc = mono_thread_execute_interruption (thread);
4238 if (exc) mono_raise_exception (exc);
4243 * Performs the interruption of the current thread, if one has been requested,
4244 * and the thread is not running a protected wrapper.
4246 void mono_thread_interruption_checkpoint ()
4248 mono_thread_interruption_checkpoint_request (FALSE);
4252 * Performs the interruption of the current thread, if one has been requested.
4254 void mono_thread_force_interruption_checkpoint ()
4256 mono_thread_interruption_checkpoint_request (TRUE);
4260 * mono_thread_get_and_clear_pending_exception:
4262 * Return any pending exceptions for the current thread and clear it as a side effect.
4265 mono_thread_get_and_clear_pending_exception (void)
4267 MonoInternalThread *thread = mono_thread_internal_current ();
4269 /* The thread may already be stopping */
4273 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4274 return mono_thread_execute_interruption (thread);
4277 if (thread->pending_exception) {
4278 MonoException *exc = thread->pending_exception;
4280 thread->pending_exception = NULL;
4288 * mono_set_pending_exception:
4290 * Set the pending exception of the current thread to EXC.
4291 * The exception will be thrown when execution returns to managed code.
4294 mono_set_pending_exception (MonoException *exc)
4296 MonoInternalThread *thread = mono_thread_internal_current ();
4298 /* The thread may already be stopping */
4302 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4304 mono_thread_request_interruption (FALSE);
4308 * mono_thread_interruption_request_flag:
4310 * Returns the address of a flag that will be non-zero if an interruption has
4311 * been requested for a thread. The thread to interrupt may not be the current
4312 * thread, so an additional call to mono_thread_interruption_requested() or
4313 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4316 gint32* mono_thread_interruption_request_flag ()
4318 return &thread_interruption_requested;
4322 mono_thread_init_apartment_state (void)
4325 MonoInternalThread* thread = mono_thread_internal_current ();
4327 /* Positive return value indicates success, either
4328 * S_OK if this is first CoInitialize call, or
4329 * S_FALSE if CoInitialize already called, but with same
4330 * threading model. A negative value indicates failure,
4331 * probably due to trying to change the threading model.
4333 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4334 ? COINIT_APARTMENTTHREADED
4335 : COINIT_MULTITHREADED) < 0) {
4336 thread->apartment_state = ThreadApartmentState_Unknown;
4342 mono_thread_cleanup_apartment_state (void)
4345 MonoInternalThread* thread = mono_thread_internal_current ();
4347 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4354 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4356 LOCK_THREAD (thread);
4357 thread->state |= state;
4358 UNLOCK_THREAD (thread);
4362 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4364 LOCK_THREAD (thread);
4365 thread->state &= ~state;
4366 UNLOCK_THREAD (thread);
4370 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4372 gboolean ret = FALSE;
4374 LOCK_THREAD (thread);
4376 if ((thread->state & test) != 0) {
4380 UNLOCK_THREAD (thread);
4385 //static MonoClassField *execution_context_field;
4388 get_execution_context_addr (void)
4390 MonoDomain *domain = mono_domain_get ();
4391 guint32 offset = domain->execution_context_field_offset;
4394 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4397 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4399 mono_domain_lock (domain);
4400 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4401 mono_domain_unlock (domain);
4404 domain->execution_context_field_offset = offset;
4407 return (MonoObject**) mono_get_special_static_data (offset);
4411 mono_thread_get_execution_context (void)
4413 return *get_execution_context_addr ();
4417 mono_thread_set_execution_context (MonoObject *ec)
4419 *get_execution_context_addr () = ec;
4422 static gboolean has_tls_get = FALSE;
4425 mono_runtime_set_has_tls_get (gboolean val)
4431 mono_runtime_has_tls_get (void)
4437 mono_thread_kill (MonoInternalThread *thread, int signal)
4439 #ifdef __native_client__
4440 /* Workaround pthread_kill abort() in NaCl glibc. */
4444 /* Win32 uses QueueUserAPC and callers of this are guarded */
4445 g_assert_not_reached ();
4447 # ifdef PTHREAD_POINTER_ID
4448 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4450 # ifdef PLATFORM_ANDROID
4451 if (thread->android_tid != 0) {
4453 int old_errno = errno;
4455 ret = tkill ((pid_t) thread->android_tid, signal);
4464 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4466 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4473 self_interrupt_thread (void *_unused)
4475 MonoThreadInfo *info = mono_thread_info_current ();
4476 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4477 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4478 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4479 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4483 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4487 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4491 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4493 MonoJitInfo **dest = data;
4499 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4501 MonoJitInfo *ji = NULL;
4504 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4509 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4512 MonoThreadInfo *info = NULL;
4513 gboolean protected_wrapper;
4514 gboolean running_managed;
4516 if (!mono_thread_info_new_interrupt_enabled ()) {
4517 signal_thread_state_change (thread);
4522 FIXME this is insanely broken, it doesn't cause interruption to happen
4523 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4525 if (thread == mono_thread_internal_current ()) {
4526 /* Do it synchronously */
4527 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4529 mono_raise_exception (exc);
4531 wapi_interrupt_thread (thread->handle);
4536 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4537 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4541 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4542 mono_thread_info_finish_suspend_and_resume (info);
4546 /*someone is already interrupting it*/
4547 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4548 mono_thread_info_finish_suspend_and_resume (info);
4551 InterlockedIncrement (&thread_interruption_requested);
4553 ji = mono_thread_info_get_last_managed (info);
4554 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4555 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4557 if (!protected_wrapper && running_managed) {
4558 /*We are in managed code*/
4559 /*Set the thread to call */
4560 if (install_async_abort)
4561 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4562 mono_thread_info_finish_suspend_and_resume (info);
4564 gpointer interrupt_handle;
4566 * This will cause waits to be broken.
4567 * It will also prevent the thread from entering a wait, so if the thread returns
4568 * from the wait before it receives the abort signal, it will just spin in the wait
4569 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4573 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4575 mono_thread_info_finish_suspend_and_resume (info);
4577 wapi_finish_interrupt_thread (interrupt_handle);
4580 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4584 transition_to_suspended (MonoInternalThread *thread, MonoThreadInfo *info)
4586 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4587 g_assert (0); /*FIXME we should not reach this */
4588 /*Make sure we balance the suspend count.*/
4590 mono_thread_info_finish_suspend_and_resume (info);
4592 thread->state &= ~ThreadState_SuspendRequested;
4593 thread->state |= ThreadState_Suspended;
4595 mono_thread_info_finish_suspend (info);
4597 UNLOCK_THREAD (thread);
4601 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4603 if (!mono_thread_info_new_interrupt_enabled ()) {
4604 signal_thread_state_change (thread);
4608 LOCK_THREAD (thread);
4609 if (thread == mono_thread_internal_current ()) {
4610 transition_to_suspended (thread, NULL);
4611 mono_thread_info_self_suspend ();
4613 MonoThreadInfo *info;
4615 gboolean protected_wrapper;
4616 gboolean running_managed;
4618 /*A null info usually means the thread is already dead. */
4619 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4620 UNLOCK_THREAD (thread);
4624 ji = mono_thread_info_get_last_managed (info);
4625 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4626 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4628 if (running_managed && !protected_wrapper) {
4629 transition_to_suspended (thread, info);
4631 gpointer interrupt_handle;
4633 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4634 InterlockedIncrement (&thread_interruption_requested);
4637 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4639 mono_thread_info_finish_suspend_and_resume (info);
4642 wapi_finish_interrupt_thread (interrupt_handle);
4644 UNLOCK_THREAD (thread);
4649 /*This is called with @thread synch_cs held and it must release it*/
4651 self_suspend_internal (MonoInternalThread *thread)
4653 if (!mono_thread_info_new_interrupt_enabled ()) {
4654 thread->state &= ~ThreadState_SuspendRequested;
4655 thread->state |= ThreadState_Suspended;
4656 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4657 if (thread->suspend_event == NULL) {
4658 UNLOCK_THREAD (thread);
4661 if (thread->suspended_event)
4662 SetEvent (thread->suspended_event);
4664 UNLOCK_THREAD (thread);
4666 if (shutting_down) {
4667 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4672 WaitForSingleObject (thread->suspend_event, INFINITE);
4674 LOCK_THREAD (thread);
4676 CloseHandle (thread->suspend_event);
4677 thread->suspend_event = NULL;
4678 thread->state &= ~ThreadState_Suspended;
4680 /* The thread that requested the resume will have replaced this event
4681 * and will be waiting for it
4683 SetEvent (thread->resume_event);
4685 UNLOCK_THREAD (thread);
4689 transition_to_suspended (thread, NULL);
4690 mono_thread_info_self_suspend ();
4693 /*This is called with @thread synch_cs held and it must release it*/
4695 resume_thread_internal (MonoInternalThread *thread)
4697 if (!mono_thread_info_new_interrupt_enabled ()) {
4698 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4699 if (thread->resume_event == NULL) {
4700 UNLOCK_THREAD (thread);
4704 /* Awake the thread */
4705 SetEvent (thread->suspend_event);
4707 UNLOCK_THREAD (thread);
4709 /* Wait for the thread to awake */
4710 WaitForSingleObject (thread->resume_event, INFINITE);
4711 CloseHandle (thread->resume_event);
4712 thread->resume_event = NULL;
4716 UNLOCK_THREAD (thread);
4717 /* Awake the thread */
4718 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4720 LOCK_THREAD (thread);
4721 thread->state &= ~ThreadState_Suspended;
4722 UNLOCK_THREAD (thread);
4728 * mono_thread_is_foreign:
4729 * @thread: the thread to query
4731 * This function allows one to determine if a thread was created by the mono runtime and has
4732 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4734 * Returns: true if @thread was not created by the runtime.
4737 mono_thread_is_foreign (MonoThread *thread)
4739 MonoThreadInfo *info = thread->internal_thread->thread_info;
4740 return info->runtime_thread == FALSE;
4744 * mono_add_joinable_thread:
4746 * Add TID to the list of joinable threads.
4747 * LOCKING: Acquires the threads lock.
4750 mono_threads_add_joinable_thread (gpointer tid)
4754 * We cannot detach from threads because it causes problems like
4755 * 2fd16f60/r114307. So we collect them and join them when
4756 * we have time (in he finalizer thread).
4758 joinable_threads_lock ();
4759 if (!joinable_threads)
4760 joinable_threads = g_hash_table_new (NULL, NULL);
4761 g_hash_table_insert (joinable_threads, tid, tid);
4762 joinable_thread_count ++;
4763 joinable_threads_unlock ();
4765 mono_gc_finalize_notify ();
4770 * mono_threads_join_threads:
4772 * Join all joinable threads. This is called from the finalizer thread.
4773 * LOCKING: Acquires the threads lock.
4776 mono_threads_join_threads (void)
4779 GHashTableIter iter;
4786 if (!joinable_thread_count)
4790 joinable_threads_lock ();
4792 if (g_hash_table_size (joinable_threads)) {
4793 g_hash_table_iter_init (&iter, joinable_threads);
4794 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4795 thread = (pthread_t)tid;
4796 g_hash_table_remove (joinable_threads, key);
4797 joinable_thread_count --;
4800 joinable_threads_unlock ();
4802 if (thread != pthread_self ())
4803 /* This shouldn't block */
4804 pthread_join (thread, NULL);
4815 * Wait for thread TID to exit.
4816 * LOCKING: Acquires the threads lock.
4819 mono_thread_join (gpointer tid)
4823 gboolean found = FALSE;
4825 joinable_threads_lock ();
4826 if (!joinable_threads)
4827 joinable_threads = g_hash_table_new (NULL, NULL);
4828 if (g_hash_table_lookup (joinable_threads, tid)) {
4829 g_hash_table_remove (joinable_threads, tid);
4830 joinable_thread_count --;
4833 joinable_threads_unlock ();
4836 thread = (pthread_t)tid;
4837 pthread_join (thread, NULL);