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;
724 mono_threads_lock ();
727 mono_threads_unlock ();
731 * The thread start argument may be an object reference, and there is
732 * no ref to keep it alive when the new thread is started but not yet
733 * registered with the collector. So we store it in a GC tracked hash
736 if (thread_start_args == NULL) {
737 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
738 thread_start_args = mono_g_hash_table_new (NULL, NULL);
740 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
741 if (threads_starting_up == NULL) {
742 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
743 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
745 mono_g_hash_table_insert (threads_starting_up, thread, thread);
746 mono_threads_unlock ();
748 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
749 if (!internal->start_notify) {
750 mono_threads_lock ();
751 mono_g_hash_table_remove (threads_starting_up, thread);
752 mono_threads_unlock ();
753 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
759 stack_size = default_stacksize_for_thread (internal);
761 /* Create suspended, so we can do some housekeeping before the thread
764 create_flags = CREATE_SUSPENDED;
765 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
766 stack_size, create_flags, &tid);
767 if (thread_handle == NULL) {
768 /* The thread couldn't be created, so throw an exception */
769 mono_threads_lock ();
770 mono_g_hash_table_remove (threads_starting_up, thread);
771 mono_threads_unlock ();
773 if (throw_on_failure)
774 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
776 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
779 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
781 internal->handle = thread_handle;
782 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
784 internal->threadpool_thread = threadpool_thread;
785 if (threadpool_thread)
786 mono_thread_set_state (internal, ThreadState_Background);
788 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
790 /* Only store the handle when the thread is about to be
791 * launched, to avoid the main thread deadlocking while trying
792 * to clean up a thread that will never be signalled.
794 if (!handle_store (thread, FALSE))
797 mono_thread_info_resume (tid);
799 if (internal->start_notify) {
801 * Wait for the thread to set up its TLS data etc, so
802 * theres no potential race condition if someone tries
803 * to look up the data believing the thread has
806 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
808 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
809 CloseHandle (internal->start_notify);
810 internal->start_notify = NULL;
813 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
818 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
820 if (mono_thread_start_cb) {
821 mono_thread_start_cb (tid, stack_start, func);
825 void mono_threads_set_default_stacksize (guint32 stacksize)
827 default_stacksize = stacksize;
830 guint32 mono_threads_get_default_stacksize (void)
832 return default_stacksize;
836 * mono_thread_create_internal:
840 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
843 MonoInternalThread *internal;
844 StartInfo *start_info;
847 thread = create_thread_object (domain);
848 internal = create_internal_thread ();
849 MONO_OBJECT_SETREF (thread, internal_thread, internal);
851 start_info = g_new0 (StartInfo, 1);
852 start_info->func = func;
853 start_info->obj = thread;
854 start_info->start_arg = arg;
856 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
860 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
861 if (mono_check_corlib_version () == NULL)
862 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
868 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
870 mono_thread_create_internal (domain, func, arg, FALSE, 0);
874 mono_thread_attach (MonoDomain *domain)
876 return mono_thread_attach_full (domain, FALSE);
880 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
882 MonoThreadInfo *info;
883 MonoInternalThread *thread;
884 MonoThread *current_thread;
885 HANDLE thread_handle;
888 if ((thread = mono_thread_internal_current ())) {
889 if (domain != mono_domain_get ())
890 mono_domain_set (domain, TRUE);
891 /* Already attached */
892 return mono_thread_current ();
895 if (!mono_gc_register_thread (&domain)) {
896 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 ());
899 thread = create_internal_thread ();
901 thread_handle = mono_thread_info_open_handle ();
902 g_assert (thread_handle);
904 tid=GetCurrentThreadId ();
906 thread->handle=thread_handle;
908 #ifdef PLATFORM_ANDROID
909 thread->android_tid = (gpointer) gettid ();
911 thread->stack_ptr = &tid;
913 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
915 info = mono_thread_info_current ();
917 thread->thread_info = info;
919 current_thread = new_thread_with_internal (domain, thread);
921 if (!handle_store (current_thread, force_attach)) {
922 /* Mono is shutting down, so just wait for the end */
927 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
929 SET_CURRENT_OBJECT (thread);
930 mono_domain_set (domain, TRUE);
932 mono_monitor_init_tls ();
934 thread_adjust_static_data (thread);
936 init_root_domain_thread (thread, current_thread);
937 if (domain != mono_get_root_domain ())
938 set_current_thread_for_domain (domain, thread, current_thread);
941 if (mono_thread_attach_cb) {
945 mono_thread_info_get_stack_bounds (&staddr, &stsize);
948 mono_thread_attach_cb (tid, &tid);
950 mono_thread_attach_cb (tid, staddr + stsize);
953 // FIXME: Need a separate callback
954 mono_profiler_thread_start (tid);
956 return current_thread;
960 mono_thread_detach_internal (MonoInternalThread *thread)
962 g_return_if_fail (thread != NULL);
964 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
966 thread_cleanup (thread);
968 SET_CURRENT_OBJECT (NULL);
969 mono_domain_unset ();
971 /* Don't need to CloseHandle this thread, even though we took a
972 * reference in mono_thread_attach (), because the GC will do it
973 * when the Thread object is finalised.
978 mono_thread_detach (MonoThread *thread)
981 mono_thread_detach_internal (thread->internal_thread);
987 MonoInternalThread *thread = mono_thread_internal_current ();
989 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
991 thread_cleanup (thread);
992 SET_CURRENT_OBJECT (NULL);
993 mono_domain_unset ();
995 /* we could add a callback here for embedders to use. */
996 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
997 exit (mono_environment_exitcode_get ());
998 mono_thread_info_exit ();
1002 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1004 MonoInternalThread *internal = create_internal_thread ();
1006 internal->state = ThreadState_Unstarted;
1008 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1012 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
1015 StartInfo *start_info;
1016 MonoInternalThread *internal;
1019 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1021 if (!this->internal_thread)
1022 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1023 internal = this->internal_thread;
1025 LOCK_THREAD (internal);
1027 if ((internal->state & ThreadState_Unstarted) == 0) {
1028 UNLOCK_THREAD (internal);
1029 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1033 if ((internal->state & ThreadState_Aborted) != 0) {
1034 UNLOCK_THREAD (internal);
1037 /* This is freed in start_wrapper */
1038 start_info = g_new0 (StartInfo, 1);
1039 start_info->func = NULL;
1040 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1041 start_info->delegate = start;
1042 start_info->obj = this;
1043 g_assert (this->obj.vtable->domain == mono_domain_get ());
1045 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1047 UNLOCK_THREAD (internal);
1051 internal->state &= ~ThreadState_Unstarted;
1053 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1055 UNLOCK_THREAD (internal);
1056 return internal->handle;
1060 * This is called from the finalizer of the internal thread object.
1063 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1065 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1068 * Since threads keep a reference to their thread object while running, by the time this function is called,
1069 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1070 * when thread_cleanup () can be called after this.
1073 CloseHandle (thread);
1075 if (this->synch_cs) {
1076 CRITICAL_SECTION *synch_cs = this->synch_cs;
1077 this->synch_cs = NULL;
1078 DeleteCriticalSection (synch_cs);
1083 void *name = this->name;
1089 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1092 MonoInternalThread *thread = mono_thread_internal_current ();
1094 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1096 mono_thread_current_check_pending_interrupt ();
1099 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1101 res = SleepEx(ms,TRUE);
1103 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1105 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1106 MonoException* exc = mono_thread_execute_interruption (thread);
1108 mono_raise_exception (exc);
1120 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1125 ves_icall_System_Threading_Thread_GetDomainID (void)
1127 return mono_domain_get()->domain_id;
1131 ves_icall_System_Threading_Thread_Yield (void)
1133 return mono_thread_info_yield ();
1137 * mono_thread_get_name:
1139 * Return the name of the thread. NAME_LEN is set to the length of the name.
1140 * Return NULL if the thread has no name. The returned memory is owned by the
1144 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1148 LOCK_THREAD (this_obj);
1150 if (!this_obj->name) {
1154 *name_len = this_obj->name_len;
1155 res = g_new (gunichar2, this_obj->name_len);
1156 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1159 UNLOCK_THREAD (this_obj);
1165 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1169 LOCK_THREAD (this_obj);
1171 if (!this_obj->name)
1174 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1176 UNLOCK_THREAD (this_obj);
1182 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1184 LOCK_THREAD (this_obj);
1186 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1187 UNLOCK_THREAD (this_obj);
1189 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1193 this_obj->name = g_new (gunichar2, mono_string_length (name));
1194 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1195 this_obj->name_len = mono_string_length (name);
1198 this_obj->name = NULL;
1201 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1203 UNLOCK_THREAD (this_obj);
1205 if (this_obj->name && this_obj->tid) {
1206 char *tname = mono_string_to_utf8 (name);
1207 mono_profiler_thread_name (this_obj->tid, tname);
1208 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1214 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1216 mono_thread_set_name_internal (this_obj, name, TRUE);
1219 /* If the array is already in the requested domain, we just return it,
1220 otherwise we return a copy in that domain. */
1222 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1229 if (mono_object_domain (arr) == domain)
1232 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1233 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1238 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1240 return byte_array_to_domain (arr, mono_get_root_domain ());
1244 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1246 return byte_array_to_domain (arr, mono_domain_get ());
1250 mono_thread_current (void)
1252 MonoDomain *domain = mono_domain_get ();
1253 MonoInternalThread *internal = mono_thread_internal_current ();
1254 MonoThread **current_thread_ptr;
1256 g_assert (internal);
1257 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1259 if (!*current_thread_ptr) {
1260 g_assert (domain != mono_get_root_domain ());
1261 *current_thread_ptr = new_thread_with_internal (domain, internal);
1263 return *current_thread_ptr;
1267 mono_thread_internal_current (void)
1269 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1270 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1274 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1275 int ms, HANDLE thread)
1277 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1280 mono_thread_current_check_pending_interrupt ();
1284 if ((this->state & ThreadState_Unstarted) != 0) {
1285 UNLOCK_THREAD (this);
1287 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1291 UNLOCK_THREAD (this);
1296 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1298 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1300 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1302 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1304 if(ret==WAIT_OBJECT_0) {
1305 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1310 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1316 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1324 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1327 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1329 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1331 if (ret != WAIT_IO_COMPLETION)
1334 exc = mono_thread_execute_interruption (thread);
1336 mono_raise_exception (exc);
1341 /* Re-calculate ms according to the time passed */
1342 diff_ms = (mono_100ns_ticks () - start) / 10000;
1343 if (diff_ms >= ms) {
1347 wait = ms - diff_ms;
1353 /* FIXME: exitContext isnt documented */
1354 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1360 MonoObject *waitHandle;
1361 MonoInternalThread *thread = mono_thread_internal_current ();
1363 /* Do this WaitSleepJoin check before creating objects */
1364 mono_thread_current_check_pending_interrupt ();
1366 numhandles = mono_array_length(mono_handles);
1367 handles = g_new0(HANDLE, numhandles);
1369 for(i = 0; i < numhandles; i++) {
1370 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1371 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1378 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1380 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1382 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1386 if(ret==WAIT_FAILED) {
1387 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1389 } else if(ret==WAIT_TIMEOUT) {
1390 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1397 /* FIXME: exitContext isnt documented */
1398 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1400 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1404 MonoObject *waitHandle;
1405 MonoInternalThread *thread = mono_thread_internal_current ();
1407 /* Do this WaitSleepJoin check before creating objects */
1408 mono_thread_current_check_pending_interrupt ();
1410 numhandles = mono_array_length(mono_handles);
1411 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1414 for(i = 0; i < numhandles; i++) {
1415 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1416 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1423 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1425 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1427 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1429 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1432 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1434 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1435 return ret - WAIT_OBJECT_0;
1437 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1438 return ret - WAIT_ABANDONED_0;
1445 /* FIXME: exitContext isnt documented */
1446 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1449 MonoInternalThread *thread = mono_thread_internal_current ();
1451 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1457 mono_thread_current_check_pending_interrupt ();
1459 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1461 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1463 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1465 if(ret==WAIT_FAILED) {
1466 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1468 } else if(ret==WAIT_TIMEOUT) {
1469 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1477 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1480 MonoInternalThread *thread = mono_thread_internal_current ();
1485 mono_thread_current_check_pending_interrupt ();
1487 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1489 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1491 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1493 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1496 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1503 mutex = CreateMutex (NULL, owned, NULL);
1505 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1507 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1515 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1516 return(ReleaseMutex (handle));
1519 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1525 *error = ERROR_SUCCESS;
1527 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1529 *error = GetLastError ();
1536 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1543 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1545 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1546 mono_string_chars (name));
1548 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1556 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1560 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1565 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1569 *error = ERROR_SUCCESS;
1571 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1573 *error = GetLastError ();
1579 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1586 event = CreateEvent (NULL, manual, initial, NULL);
1588 event = CreateEvent (NULL, manual, initial,
1589 mono_string_chars (name));
1591 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1599 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1600 return (SetEvent(handle));
1603 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1604 return (ResetEvent(handle));
1608 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1609 CloseHandle (handle);
1612 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1618 *error = ERROR_SUCCESS;
1620 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1622 *error = GetLastError ();
1628 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1630 return InterlockedIncrement (location);
1633 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1635 #if SIZEOF_VOID_P == 4
1636 if (G_UNLIKELY ((size_t)location & 0x7)) {
1638 mono_interlocked_lock ();
1641 mono_interlocked_unlock ();
1645 return InterlockedIncrement64 (location);
1648 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1650 return InterlockedDecrement(location);
1653 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1655 #if SIZEOF_VOID_P == 4
1656 if (G_UNLIKELY ((size_t)location & 0x7)) {
1658 mono_interlocked_lock ();
1661 mono_interlocked_unlock ();
1665 return InterlockedDecrement64 (location);
1668 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1670 return InterlockedExchange(location, value);
1673 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1676 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1677 mono_gc_wbarrier_generic_nostore (location);
1681 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1683 return InterlockedExchangePointer(location, value);
1686 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1688 IntFloatUnion val, ret;
1691 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1697 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1699 #if SIZEOF_VOID_P == 4
1700 if (G_UNLIKELY ((size_t)location & 0x7)) {
1702 mono_interlocked_lock ();
1705 mono_interlocked_unlock ();
1709 return InterlockedExchange64 (location, value);
1713 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1715 LongDoubleUnion val, ret;
1718 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1723 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1725 return InterlockedCompareExchange(location, value, comparand);
1728 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1731 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1732 mono_gc_wbarrier_generic_nostore (location);
1736 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1738 return InterlockedCompareExchangePointer(location, value, comparand);
1741 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1743 IntFloatUnion val, ret, cmp;
1746 cmp.fval = comparand;
1747 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1753 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1755 #if SIZEOF_VOID_P == 8
1756 LongDoubleUnion val, comp, ret;
1759 comp.fval = comparand;
1760 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1766 mono_interlocked_lock ();
1768 if (old == comparand)
1770 mono_interlocked_unlock ();
1777 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1779 #if SIZEOF_VOID_P == 4
1780 if (G_UNLIKELY ((size_t)location & 0x7)) {
1782 mono_interlocked_lock ();
1784 if (old == comparand)
1786 mono_interlocked_unlock ();
1790 return InterlockedCompareExchange64 (location, value, comparand);
1794 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1797 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1798 mono_gc_wbarrier_generic_nostore (location);
1803 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1806 res = InterlockedExchangePointer ((gpointer *)location, value);
1807 mono_gc_wbarrier_generic_nostore (location);
1812 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1814 return InterlockedAdd (location, value);
1818 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1820 #if SIZEOF_VOID_P == 4
1821 if (G_UNLIKELY ((size_t)location & 0x7)) {
1823 mono_interlocked_lock ();
1826 mono_interlocked_unlock ();
1830 return InterlockedAdd64 (location, value);
1834 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1836 #if SIZEOF_VOID_P == 4
1837 if (G_UNLIKELY ((size_t)location & 0x7)) {
1839 mono_interlocked_lock ();
1841 mono_interlocked_unlock ();
1845 return InterlockedRead64 (location);
1849 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1851 mono_memory_barrier ();
1855 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1857 mono_thread_clr_state (this, state);
1859 if (state & ThreadState_Background) {
1860 /* If the thread changes the background mode, the main thread has to
1861 * be notified, since it has to rebuild the list of threads to
1864 SetEvent (background_change_event);
1869 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1871 mono_thread_set_state (this, state);
1873 if (state & ThreadState_Background) {
1874 /* If the thread changes the background mode, the main thread has to
1875 * be notified, since it has to rebuild the list of threads to
1878 SetEvent (background_change_event);
1883 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1889 state = this->state;
1891 UNLOCK_THREAD (this);
1896 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1898 MonoInternalThread *current;
1903 current = mono_thread_internal_current ();
1905 this->thread_interrupt_requested = TRUE;
1906 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1908 UNLOCK_THREAD (this);
1911 abort_thread_internal (this, TRUE, FALSE);
1915 void mono_thread_current_check_pending_interrupt ()
1917 MonoInternalThread *thread = mono_thread_internal_current ();
1918 gboolean throw = FALSE;
1920 LOCK_THREAD (thread);
1922 if (thread->thread_interrupt_requested) {
1924 thread->thread_interrupt_requested = FALSE;
1927 UNLOCK_THREAD (thread);
1930 mono_raise_exception (mono_get_exception_thread_interrupted ());
1935 mono_thread_get_abort_signal (void)
1939 #elif defined(PLATFORM_ANDROID)
1941 #elif !defined (SIGRTMIN)
1946 #endif /* SIGUSR1 */
1948 static int abort_signum = -1;
1950 if (abort_signum != -1)
1951 return abort_signum;
1952 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1953 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1954 struct sigaction sinfo;
1955 sigaction (i, NULL, &sinfo);
1956 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1961 /* fallback to the old way */
1963 #endif /* HOST_WIN32 */
1967 static void CALLBACK interruption_request_apc (ULONG_PTR param)
1969 MonoException* exc = mono_thread_request_interruption (FALSE);
1970 if (exc) mono_raise_exception (exc);
1972 #endif /* HOST_WIN32 */
1975 * signal_thread_state_change
1977 * Tells the thread that his state has changed and it has to enter the new
1978 * state as soon as possible.
1980 static void signal_thread_state_change (MonoInternalThread *thread)
1983 gpointer wait_handle;
1986 if (thread == mono_thread_internal_current ()) {
1987 /* Do it synchronously */
1988 MonoException *exc = mono_thread_request_interruption (FALSE);
1990 mono_raise_exception (exc);
1994 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
1997 * This will cause waits to be broken.
1998 * It will also prevent the thread from entering a wait, so if the thread returns
1999 * from the wait before it receives the abort signal, it will just spin in the wait
2000 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2003 wait_handle = wapi_prepare_interrupt_thread (thread->handle);
2005 /* fixme: store the state somewhere */
2006 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2008 wapi_finish_interrupt_thread (wait_handle);
2009 #endif /* HOST_WIN32 */
2013 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2015 LOCK_THREAD (thread);
2017 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2018 (thread->state & ThreadState_StopRequested) != 0 ||
2019 (thread->state & ThreadState_Stopped) != 0)
2021 UNLOCK_THREAD (thread);
2025 if ((thread->state & ThreadState_Unstarted) != 0) {
2026 thread->state |= ThreadState_Aborted;
2027 UNLOCK_THREAD (thread);
2031 thread->state |= ThreadState_AbortRequested;
2032 if (thread->abort_state_handle)
2033 mono_gchandle_free (thread->abort_state_handle);
2035 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2036 g_assert (thread->abort_state_handle);
2038 thread->abort_state_handle = 0;
2040 thread->abort_exc = NULL;
2043 * abort_exc is set in mono_thread_execute_interruption(),
2044 * triggered by the call to signal_thread_state_change(),
2045 * below. There's a point between where we have
2046 * abort_state_handle set, but abort_exc NULL, but that's not
2050 UNLOCK_THREAD (thread);
2052 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2054 /* During shutdown, we can't wait for other threads */
2056 /* Make sure the thread is awake */
2057 mono_thread_resume (thread);
2059 abort_thread_internal (thread, TRUE, TRUE);
2063 ves_icall_System_Threading_Thread_ResetAbort (void)
2065 MonoInternalThread *thread = mono_thread_internal_current ();
2066 gboolean was_aborting;
2068 LOCK_THREAD (thread);
2069 was_aborting = thread->state & ThreadState_AbortRequested;
2070 thread->state &= ~ThreadState_AbortRequested;
2071 UNLOCK_THREAD (thread);
2073 if (!was_aborting) {
2074 const char *msg = "Unable to reset abort because no abort was requested";
2075 mono_raise_exception (mono_get_exception_thread_state (msg));
2077 thread->abort_exc = NULL;
2078 if (thread->abort_state_handle) {
2079 mono_gchandle_free (thread->abort_state_handle);
2080 /* This is actually not necessary - the handle
2081 only counts if the exception is set */
2082 thread->abort_state_handle = 0;
2087 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2089 LOCK_THREAD (thread);
2091 thread->state &= ~ThreadState_AbortRequested;
2093 if (thread->abort_exc) {
2094 thread->abort_exc = NULL;
2095 if (thread->abort_state_handle) {
2096 mono_gchandle_free (thread->abort_state_handle);
2097 /* This is actually not necessary - the handle
2098 only counts if the exception is set */
2099 thread->abort_state_handle = 0;
2103 UNLOCK_THREAD (thread);
2107 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2109 MonoInternalThread *thread = this->internal_thread;
2110 MonoObject *state, *deserialized = NULL, *exc;
2113 if (!thread->abort_state_handle)
2116 state = mono_gchandle_get_target (thread->abort_state_handle);
2119 domain = mono_domain_get ();
2120 if (mono_object_domain (state) == domain)
2123 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2125 if (!deserialized) {
2126 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2128 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2129 mono_raise_exception (invalid_op_exc);
2132 return deserialized;
2136 mono_thread_suspend (MonoInternalThread *thread)
2138 LOCK_THREAD (thread);
2140 if ((thread->state & ThreadState_Unstarted) != 0 ||
2141 (thread->state & ThreadState_Aborted) != 0 ||
2142 (thread->state & ThreadState_Stopped) != 0)
2144 UNLOCK_THREAD (thread);
2148 if ((thread->state & ThreadState_Suspended) != 0 ||
2149 (thread->state & ThreadState_SuspendRequested) != 0 ||
2150 (thread->state & ThreadState_StopRequested) != 0)
2152 UNLOCK_THREAD (thread);
2156 thread->state |= ThreadState_SuspendRequested;
2158 UNLOCK_THREAD (thread);
2160 suspend_thread_internal (thread, FALSE);
2165 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2167 if (!mono_thread_suspend (thread))
2168 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2172 mono_thread_resume (MonoInternalThread *thread)
2174 LOCK_THREAD (thread);
2176 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2177 thread->state &= ~ThreadState_SuspendRequested;
2178 UNLOCK_THREAD (thread);
2182 if ((thread->state & ThreadState_Suspended) == 0 ||
2183 (thread->state & ThreadState_Unstarted) != 0 ||
2184 (thread->state & ThreadState_Aborted) != 0 ||
2185 (thread->state & ThreadState_Stopped) != 0)
2187 UNLOCK_THREAD (thread);
2191 return resume_thread_internal (thread);
2195 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2197 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2198 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2202 mono_threads_is_critical_method (MonoMethod *method)
2204 switch (method->wrapper_type) {
2205 case MONO_WRAPPER_RUNTIME_INVOKE:
2206 case MONO_WRAPPER_XDOMAIN_INVOKE:
2207 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2214 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2219 if (mono_threads_is_critical_method (m)) {
2220 *((gboolean*)data) = TRUE;
2227 is_running_protected_wrapper (void)
2229 gboolean found = FALSE;
2230 mono_stack_walk (find_wrapper, &found);
2234 void mono_thread_internal_stop (MonoInternalThread *thread)
2236 LOCK_THREAD (thread);
2238 if ((thread->state & ThreadState_StopRequested) != 0 ||
2239 (thread->state & ThreadState_Stopped) != 0)
2241 UNLOCK_THREAD (thread);
2245 /* Make sure the thread is awake */
2246 mono_thread_resume (thread);
2248 thread->state |= ThreadState_StopRequested;
2249 thread->state &= ~ThreadState_AbortRequested;
2251 UNLOCK_THREAD (thread);
2253 abort_thread_internal (thread, TRUE, TRUE);
2256 void mono_thread_stop (MonoThread *thread)
2258 mono_thread_internal_stop (thread->internal_thread);
2262 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2265 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2270 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2273 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2278 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2281 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2286 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2289 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2294 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2297 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2298 return (void *) tmp;
2302 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2304 volatile MonoObject *tmp;
2305 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2306 return (MonoObject *) tmp;
2310 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2313 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2318 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2321 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2326 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2328 return InterlockedRead8 (ptr);
2332 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2334 return InterlockedRead16 (ptr);
2338 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2340 return InterlockedRead (ptr);
2344 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2346 #if SIZEOF_VOID_P == 4
2347 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2349 mono_interlocked_lock ();
2350 val = *(gint64*)ptr;
2351 mono_interlocked_unlock ();
2355 return InterlockedRead64 (ptr);
2359 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2361 return InterlockedReadPointer (ptr);
2365 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2369 #if SIZEOF_VOID_P == 4
2370 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2372 mono_interlocked_lock ();
2373 val = *(double*)ptr;
2374 mono_interlocked_unlock ();
2379 u.ival = InterlockedRead64 (ptr);
2385 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2389 u.ival = InterlockedRead (ptr);
2395 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2397 return InterlockedReadPointer (ptr);
2401 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2403 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2407 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2409 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2413 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2415 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2419 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2421 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2425 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2427 mono_atomic_store_release ((volatile void **) ptr, value);
2431 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2433 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2437 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2439 mono_atomic_store_release ((volatile double *) ptr, value);
2443 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2445 mono_atomic_store_release ((volatile float *) ptr, value);
2449 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2451 InterlockedWrite8 (ptr, value);
2455 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2457 InterlockedWrite16 (ptr, value);
2461 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2463 InterlockedWrite (ptr, value);
2467 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2469 #if SIZEOF_VOID_P == 4
2470 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2471 mono_interlocked_lock ();
2472 *(gint64*)ptr = value;
2473 mono_interlocked_unlock ();
2478 InterlockedWrite64 (ptr, value);
2482 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2484 InterlockedWritePointer (ptr, value);
2488 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2492 #if SIZEOF_VOID_P == 4
2493 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2494 mono_interlocked_lock ();
2495 *(double*)ptr = value;
2496 mono_interlocked_unlock ();
2503 InterlockedWrite64 (ptr, u.ival);
2507 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2513 InterlockedWrite (ptr, u.ival);
2517 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2519 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2523 mono_thread_init_tls (void)
2525 MONO_FAST_TLS_INIT (tls_current_object);
2526 mono_native_tls_alloc (¤t_object_key, NULL);
2529 void mono_thread_init (MonoThreadStartCB start_cb,
2530 MonoThreadAttachCB attach_cb)
2532 InitializeCriticalSection(&threads_mutex);
2533 InitializeCriticalSection(&interlocked_mutex);
2534 InitializeCriticalSection(&contexts_mutex);
2535 InitializeCriticalSection(&joinable_threads_mutex);
2537 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2538 g_assert(background_change_event != NULL);
2540 mono_init_static_data_info (&thread_static_info);
2541 mono_init_static_data_info (&context_static_info);
2543 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2545 mono_thread_start_cb = start_cb;
2546 mono_thread_attach_cb = attach_cb;
2548 /* Get a pseudo handle to the current process. This is just a
2549 * kludge so that wapi can build a process handle if needed.
2550 * As a pseudo handle is returned, we don't need to clean
2553 GetCurrentProcess ();
2556 void mono_thread_cleanup (void)
2558 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2559 MonoThreadInfo *info;
2561 /* The main thread must abandon any held mutexes (particularly
2562 * important for named mutexes as they are shared across
2563 * processes, see bug 74680.) This will happen when the
2564 * thread exits, but if it's not running in a subthread it
2565 * won't exit in time.
2567 info = mono_thread_info_current ();
2568 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2572 /* This stuff needs more testing, it seems one of these
2573 * critical sections can be locked when mono_thread_cleanup is
2576 DeleteCriticalSection (&threads_mutex);
2577 DeleteCriticalSection (&interlocked_mutex);
2578 DeleteCriticalSection (&contexts_mutex);
2579 DeleteCriticalSection (&delayed_free_table_mutex);
2580 DeleteCriticalSection (&small_id_mutex);
2581 CloseHandle (background_change_event);
2584 mono_native_tls_free (current_object_key);
2588 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2590 mono_thread_cleanup_fn = func;
2594 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2596 thread->internal_thread->manage_callback = func;
2599 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2601 mono_thread_notify_pending_exc_fn = func;
2605 static void print_tids (gpointer key, gpointer value, gpointer user)
2607 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2608 * sizeof(uint) and a cast to uint would overflow
2610 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2611 * print this as a pointer.
2613 g_message ("Waiting for: %p", key);
2618 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2619 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2623 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2627 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2629 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2631 if(ret==WAIT_FAILED) {
2632 /* See the comment in build_wait_tids() */
2633 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2637 for(i=0; i<wait->num; i++)
2638 CloseHandle (wait->handles[i]);
2640 if (ret == WAIT_TIMEOUT)
2643 for(i=0; i<wait->num; i++) {
2644 gsize tid = wait->threads[i]->tid;
2647 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2648 * it can still run io-layer etc. code. So wait for it to really exit.
2649 * FIXME: This won't join threads which are not in the joinable_hash yet.
2651 mono_thread_join ((gpointer)tid);
2653 mono_threads_lock ();
2654 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2655 /* This thread must have been killed, because
2656 * it hasn't cleaned itself up. (It's just
2657 * possible that the thread exited before the
2658 * parent thread had a chance to store the
2659 * handle, and now there is another pointer to
2660 * the already-exited thread stored. In this
2661 * case, we'll just get two
2662 * mono_profiler_thread_end() calls for the
2666 mono_threads_unlock ();
2667 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2668 thread_cleanup (wait->threads[i]);
2670 mono_threads_unlock ();
2675 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2677 guint32 i, ret, count;
2679 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2681 /* Add the thread state change event, so it wakes up if a thread changes
2682 * to background mode.
2685 if (count < MAXIMUM_WAIT_OBJECTS) {
2686 wait->handles [count] = background_change_event;
2690 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2692 if(ret==WAIT_FAILED) {
2693 /* See the comment in build_wait_tids() */
2694 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2698 for(i=0; i<wait->num; i++)
2699 CloseHandle (wait->handles[i]);
2701 if (ret == WAIT_TIMEOUT)
2704 if (ret < wait->num) {
2705 gsize tid = wait->threads[ret]->tid;
2706 mono_threads_lock ();
2707 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2708 /* See comment in wait_for_tids about thread cleanup */
2709 mono_threads_unlock ();
2710 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2711 thread_cleanup (wait->threads [ret]);
2713 mono_threads_unlock ();
2717 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2719 struct wait_data *wait=(struct wait_data *)user;
2721 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2723 MonoInternalThread *thread=(MonoInternalThread *)value;
2725 /* Ignore background threads, we abort them later */
2726 /* Do not lock here since it is not needed and the caller holds threads_lock */
2727 if (thread->state & ThreadState_Background) {
2728 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2729 return; /* just leave, ignore */
2732 if (mono_gc_is_finalizer_internal_thread (thread)) {
2733 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2737 if (thread == mono_thread_internal_current ()) {
2738 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2742 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2743 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2747 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2748 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2752 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2753 if (handle == NULL) {
2754 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2758 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2759 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2760 wait->handles[wait->num]=handle;
2761 wait->threads[wait->num]=thread;
2764 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2766 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2771 /* Just ignore the rest, we can't do anything with
2778 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2780 struct wait_data *wait=(struct wait_data *)user;
2781 gsize self = GetCurrentThreadId ();
2782 MonoInternalThread *thread = value;
2785 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2788 /* The finalizer thread is not a background thread */
2789 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2790 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2792 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2796 /* printf ("A: %d\n", wait->num); */
2797 wait->handles[wait->num]=thread->handle;
2798 wait->threads[wait->num]=thread;
2801 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2802 mono_thread_internal_stop (thread);
2806 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2810 * mono_threads_set_shutting_down:
2812 * Is called by a thread that wants to shut down Mono. If the runtime is already
2813 * shutting down, the calling thread is suspended/stopped, and this function never
2817 mono_threads_set_shutting_down (void)
2819 MonoInternalThread *current_thread = mono_thread_internal_current ();
2821 mono_threads_lock ();
2823 if (shutting_down) {
2824 mono_threads_unlock ();
2826 /* Make sure we're properly suspended/stopped */
2828 LOCK_THREAD (current_thread);
2830 if ((current_thread->state & ThreadState_SuspendRequested) ||
2831 (current_thread->state & ThreadState_AbortRequested) ||
2832 (current_thread->state & ThreadState_StopRequested)) {
2833 UNLOCK_THREAD (current_thread);
2834 mono_thread_execute_interruption (current_thread);
2836 current_thread->state |= ThreadState_Stopped;
2837 UNLOCK_THREAD (current_thread);
2840 /*since we're killing the thread, unset the current domain.*/
2841 mono_domain_unset ();
2843 /* Wake up other threads potentially waiting for us */
2844 mono_thread_info_exit ();
2846 shutting_down = TRUE;
2848 /* Not really a background state change, but this will
2849 * interrupt the main thread if it is waiting for all
2850 * the other threads.
2852 SetEvent (background_change_event);
2854 mono_threads_unlock ();
2858 void mono_thread_manage (void)
2860 struct wait_data wait_data;
2861 struct wait_data *wait = &wait_data;
2863 memset (wait, 0, sizeof (struct wait_data));
2864 /* join each thread that's still running */
2865 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2867 mono_threads_lock ();
2869 THREAD_DEBUG (g_message("%s: No threads", __func__));
2870 mono_threads_unlock ();
2873 mono_threads_unlock ();
2876 mono_threads_lock ();
2877 if (shutting_down) {
2878 /* somebody else is shutting down */
2879 mono_threads_unlock ();
2882 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2883 mono_g_hash_table_foreach (threads, print_tids, NULL));
2885 ResetEvent (background_change_event);
2887 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2888 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2889 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2890 mono_threads_unlock ();
2892 /* Something to wait for */
2893 wait_for_tids_or_state_change (wait, INFINITE);
2895 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2896 } while(wait->num>0);
2898 /* Mono is shutting down, so just wait for the end */
2899 if (!mono_runtime_try_shutdown ()) {
2900 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2901 mono_thread_suspend (mono_thread_internal_current ());
2902 mono_thread_execute_interruption (mono_thread_internal_current ());
2906 * Remove everything but the finalizer thread and self.
2907 * Also abort all the background threads
2910 mono_threads_lock ();
2913 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2914 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2915 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2917 mono_threads_unlock ();
2919 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2921 /* Something to wait for */
2922 wait_for_tids (wait, INFINITE);
2924 } while (wait->num > 0);
2927 * give the subthreads a chance to really quit (this is mainly needed
2928 * to get correct user and system times from getrusage/wait/time(1)).
2929 * This could be removed if we avoid pthread_detach() and use pthread_join().
2932 mono_thread_info_yield ();
2936 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2938 MonoInternalThread *thread=(MonoInternalThread *)value;
2940 if(thread->tid != (gsize)user) {
2941 /*TerminateThread (thread->handle, -1);*/
2945 void mono_thread_abort_all_other_threads (void)
2947 gsize self = GetCurrentThreadId ();
2949 mono_threads_lock ();
2950 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2951 mono_g_hash_table_size (threads));
2952 mono_g_hash_table_foreach (threads, print_tids, NULL));
2954 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2956 mono_threads_unlock ();
2960 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2962 MonoInternalThread *thread = (MonoInternalThread*)value;
2963 struct wait_data *wait = (struct wait_data*)user_data;
2967 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2969 * This needs no locking.
2971 if ((thread->state & ThreadState_Suspended) != 0 ||
2972 (thread->state & ThreadState_Stopped) != 0)
2975 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2976 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2980 wait->handles [wait->num] = handle;
2981 wait->threads [wait->num] = thread;
2987 * mono_thread_suspend_all_other_threads:
2989 * Suspend all managed threads except the finalizer thread and this thread. It is
2990 * not possible to resume them later.
2992 void mono_thread_suspend_all_other_threads (void)
2994 struct wait_data wait_data;
2995 struct wait_data *wait = &wait_data;
2997 gsize self = GetCurrentThreadId ();
2999 guint32 eventidx = 0;
3000 gboolean starting, finished;
3002 memset (wait, 0, sizeof (struct wait_data));
3004 * The other threads could be in an arbitrary state at this point, i.e.
3005 * they could be starting up, shutting down etc. This means that there could be
3006 * threads which are not even in the threads hash table yet.
3010 * First we set a barrier which will be checked by all threads before they
3011 * are added to the threads hash table, and they will exit if the flag is set.
3012 * This ensures that no threads could be added to the hash later.
3013 * We will use shutting_down as the barrier for now.
3015 g_assert (shutting_down);
3018 * We make multiple calls to WaitForMultipleObjects since:
3019 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3020 * - some threads could exit without becoming suspended
3025 * Make a copy of the hashtable since we can't do anything with
3026 * threads while threads_mutex is held.
3029 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3030 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3031 mono_threads_lock ();
3032 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3033 mono_threads_unlock ();
3035 events = g_new0 (gpointer, wait->num);
3037 /* Get the suspended events that we'll be waiting for */
3038 for (i = 0; i < wait->num; ++i) {
3039 MonoInternalThread *thread = wait->threads [i];
3040 gboolean signal_suspend = FALSE;
3042 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3043 //CloseHandle (wait->handles [i]);
3044 wait->threads [i] = NULL; /* ignore this thread in next loop */
3048 LOCK_THREAD (thread);
3050 if (thread->suspended_event == NULL) {
3051 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3052 if (thread->suspended_event == NULL) {
3053 /* Forget this one and go on to the next */
3054 UNLOCK_THREAD (thread);
3059 if ((thread->state & ThreadState_Suspended) != 0 ||
3060 (thread->state & ThreadState_StopRequested) != 0 ||
3061 (thread->state & ThreadState_Stopped) != 0) {
3062 UNLOCK_THREAD (thread);
3063 CloseHandle (wait->handles [i]);
3064 wait->threads [i] = NULL; /* ignore this thread in next loop */
3068 if ((thread->state & ThreadState_SuspendRequested) == 0)
3069 signal_suspend = TRUE;
3071 events [eventidx++] = thread->suspended_event;
3073 /* Convert abort requests into suspend requests */
3074 if ((thread->state & ThreadState_AbortRequested) != 0)
3075 thread->state &= ~ThreadState_AbortRequested;
3077 thread->state |= ThreadState_SuspendRequested;
3079 UNLOCK_THREAD (thread);
3081 /* Signal the thread to suspend */
3082 if (mono_thread_info_new_interrupt_enabled ())
3083 suspend_thread_internal (thread, TRUE);
3084 else if (signal_suspend)
3085 signal_thread_state_change (thread);
3088 /*Only wait on the suspend event if we are using the old path */
3089 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3090 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3091 for (i = 0; i < wait->num; ++i) {
3092 MonoInternalThread *thread = wait->threads [i];
3097 LOCK_THREAD (thread);
3098 if ((thread->state & ThreadState_Suspended) != 0) {
3099 CloseHandle (thread->suspended_event);
3100 thread->suspended_event = NULL;
3102 UNLOCK_THREAD (thread);
3106 if (eventidx <= 0) {
3108 * If there are threads which are starting up, we wait until they
3109 * are suspended when they try to register in the threads hash.
3110 * This is guaranteed to finish, since the threads which can create new
3111 * threads get suspended after a while.
3112 * FIXME: The finalizer thread can still create new threads.
3114 mono_threads_lock ();
3115 if (threads_starting_up)
3116 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3119 mono_threads_unlock ();
3131 collect_threads (gpointer key, gpointer value, gpointer user_data)
3133 MonoInternalThread *thread = (MonoInternalThread*)value;
3134 struct wait_data *wait = (struct wait_data*)user_data;
3137 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3138 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3142 wait->handles [wait->num] = handle;
3143 wait->threads [wait->num] = thread;
3148 static gboolean thread_dump_requested;
3150 static G_GNUC_UNUSED gboolean
3151 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3153 GString *p = (GString*)data;
3154 MonoMethod *method = NULL;
3156 method = mono_jit_info_get_method (frame->ji);
3159 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3160 g_string_append_printf (p, " %s\n", location);
3163 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3169 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3171 GString* text = g_string_new (0);
3173 GError *error = NULL;
3176 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3178 g_string_append_printf (text, "\n\"%s\"", name);
3181 else if (thread->threadpool_thread)
3182 g_string_append (text, "\n\"<threadpool thread>\"");
3184 g_string_append (text, "\n\"<unnamed thread>\"");
3187 /* This no longer works with remote unwinding */
3189 wapi_desc = wapi_current_thread_desc ();
3190 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3195 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3196 mono_thread_info_finish_suspend_and_resume (info);
3198 fprintf (stdout, "%s", text->str);
3200 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3201 OutputDebugStringA(text->str);
3204 g_string_free (text, TRUE);
3209 dump_thread (gpointer key, gpointer value, gpointer user)
3211 MonoInternalThread *thread = (MonoInternalThread *)value;
3212 MonoThreadInfo *info;
3214 if (thread == mono_thread_internal_current ())
3218 FIXME This still can hang if we stop a thread during malloc.
3219 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3220 that takes a callback and runs it with the target suspended.
3221 We probably should loop a bit around trying to get it to either managed code
3224 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3229 print_thread_dump (thread, info);
3233 mono_threads_perform_thread_dump (void)
3235 if (!thread_dump_requested)
3238 printf ("Full thread dump:\n");
3241 * Make a copy of the hashtable since we can't do anything with
3242 * threads while threads_mutex is held.
3244 mono_threads_lock ();
3245 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3246 mono_threads_unlock ();
3248 thread_dump_requested = FALSE;
3252 * mono_threads_request_thread_dump:
3254 * Ask all threads except the current to print their stacktrace to stdout.
3257 mono_threads_request_thread_dump (void)
3259 struct wait_data wait_data;
3260 struct wait_data *wait = &wait_data;
3263 /*The new thread dump code runs out of the finalizer thread. */
3264 if (mono_thread_info_new_interrupt_enabled ()) {
3265 thread_dump_requested = TRUE;
3266 mono_gc_finalize_notify ();
3271 memset (wait, 0, sizeof (struct wait_data));
3274 * Make a copy of the hashtable since we can't do anything with
3275 * threads while threads_mutex is held.
3277 mono_threads_lock ();
3278 mono_g_hash_table_foreach (threads, collect_threads, wait);
3279 mono_threads_unlock ();
3281 for (i = 0; i < wait->num; ++i) {
3282 MonoInternalThread *thread = wait->threads [i];
3284 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3285 (thread != mono_thread_internal_current ()) &&
3286 !thread->thread_dump_requested) {
3287 thread->thread_dump_requested = TRUE;
3289 signal_thread_state_change (thread);
3292 CloseHandle (wait->handles [i]);
3298 gint allocated; /* +1 so that refs [allocated] == NULL */
3302 typedef struct ref_stack RefStack;
3305 ref_stack_new (gint initial_size)
3309 initial_size = MAX (initial_size, 16) + 1;
3310 rs = g_new0 (RefStack, 1);
3311 rs->refs = g_new0 (gpointer, initial_size);
3312 rs->allocated = initial_size;
3317 ref_stack_destroy (gpointer ptr)
3328 ref_stack_push (RefStack *rs, gpointer ptr)
3330 g_assert (rs != NULL);
3332 if (rs->bottom >= rs->allocated) {
3333 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3334 rs->allocated <<= 1;
3335 rs->refs [rs->allocated] = NULL;
3337 rs->refs [rs->bottom++] = ptr;
3341 ref_stack_pop (RefStack *rs)
3343 if (rs == NULL || rs->bottom == 0)
3347 rs->refs [rs->bottom] = NULL;
3351 ref_stack_find (RefStack *rs, gpointer ptr)
3358 for (refs = rs->refs; refs && *refs; refs++) {
3366 * mono_thread_push_appdomain_ref:
3368 * Register that the current thread may have references to objects in domain
3369 * @domain on its stack. Each call to this function should be paired with a
3370 * call to pop_appdomain_ref.
3373 mono_thread_push_appdomain_ref (MonoDomain *domain)
3375 MonoInternalThread *thread = mono_thread_internal_current ();
3378 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3379 SPIN_LOCK (thread->lock_thread_id);
3380 if (thread->appdomain_refs == NULL)
3381 thread->appdomain_refs = ref_stack_new (16);
3382 ref_stack_push (thread->appdomain_refs, domain);
3383 SPIN_UNLOCK (thread->lock_thread_id);
3388 mono_thread_pop_appdomain_ref (void)
3390 MonoInternalThread *thread = mono_thread_internal_current ();
3393 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3394 SPIN_LOCK (thread->lock_thread_id);
3395 ref_stack_pop (thread->appdomain_refs);
3396 SPIN_UNLOCK (thread->lock_thread_id);
3401 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3404 SPIN_LOCK (thread->lock_thread_id);
3405 res = ref_stack_find (thread->appdomain_refs, domain);
3406 SPIN_UNLOCK (thread->lock_thread_id);
3411 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3413 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3416 typedef struct abort_appdomain_data {
3417 struct wait_data wait;
3419 } abort_appdomain_data;
3422 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3424 MonoInternalThread *thread = (MonoInternalThread*)value;
3425 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3426 MonoDomain *domain = data->domain;
3428 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3429 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3431 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3432 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3435 data->wait.handles [data->wait.num] = handle;
3436 data->wait.threads [data->wait.num] = thread;
3439 /* Just ignore the rest, we can't do anything with
3447 * mono_threads_abort_appdomain_threads:
3449 * Abort threads which has references to the given appdomain.
3452 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3454 #ifdef __native_client__
3458 abort_appdomain_data user_data;
3460 int orig_timeout = timeout;
3463 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3465 start_time = mono_msec_ticks ();
3467 mono_threads_lock ();
3469 user_data.domain = domain;
3470 user_data.wait.num = 0;
3471 /* This shouldn't take any locks */
3472 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3473 mono_threads_unlock ();
3475 if (user_data.wait.num > 0) {
3476 /* Abort the threads outside the threads lock */
3477 for (i = 0; i < user_data.wait.num; ++i)
3478 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3481 * We should wait for the threads either to abort, or to leave the
3482 * domain. We can't do the latter, so we wait with a timeout.
3484 wait_for_tids (&user_data.wait, 100);
3487 /* Update remaining time */
3488 timeout -= mono_msec_ticks () - start_time;
3489 start_time = mono_msec_ticks ();
3491 if (orig_timeout != -1 && timeout < 0)
3494 while (user_data.wait.num > 0);
3496 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3502 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3504 MonoInternalThread *thread = (MonoInternalThread*)value;
3505 MonoDomain *domain = (MonoDomain*)user_data;
3508 /* No locking needed here */
3509 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3511 if (thread->cached_culture_info) {
3512 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3513 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3514 if (obj && obj->vtable->domain == domain)
3515 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3521 * mono_threads_clear_cached_culture:
3523 * Clear the cached_current_culture from all threads if it is in the
3527 mono_threads_clear_cached_culture (MonoDomain *domain)
3529 mono_threads_lock ();
3530 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3531 mono_threads_unlock ();
3535 * mono_thread_get_undeniable_exception:
3537 * Return an exception which needs to be raised when leaving a catch clause.
3538 * This is used for undeniable exception propagation.
3541 mono_thread_get_undeniable_exception (void)
3543 MonoInternalThread *thread = mono_thread_internal_current ();
3545 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3547 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3548 * exception if the thread no longer references a dying appdomain.
3550 thread->abort_exc->trace_ips = NULL;
3551 thread->abort_exc->stack_trace = NULL;
3552 return thread->abort_exc;
3558 #if MONO_SMALL_CONFIG
3559 #define NUM_STATIC_DATA_IDX 4
3560 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3564 #define NUM_STATIC_DATA_IDX 8
3565 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3566 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3570 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3573 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3576 gpointer *static_data = addr;
3577 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3580 if (!static_data [i])
3582 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3583 ptr = static_data [i];
3584 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3585 uintptr_t bmap = static_reference_bitmaps [i][j];
3588 if ((bmap & 1) && *p) {
3599 * mono_alloc_static_data
3601 * Allocate memory blocks for storing threads or context static data
3604 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3606 guint idx = (offset >> 24) - 1;
3609 gpointer* static_data = *static_data_ptr;
3611 static void* tls_desc = NULL;
3612 if (mono_gc_user_markers_supported () && !tls_desc)
3613 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3614 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3615 *static_data_ptr = static_data;
3616 static_data [0] = static_data;
3619 for (i = 1; i <= idx; ++i) {
3620 if (static_data [i])
3622 if (mono_gc_user_markers_supported () && threadlocal)
3623 static_data [i] = g_malloc0 (static_data_size [i]);
3625 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3630 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3633 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3634 gpointer p = static_data [i];
3638 * At this point, the static data pointer array is still registered with the
3639 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3640 * data. Freeing the individual arrays without first nulling their slots
3641 * would make it possible for mark_tls_slots() to encounter a pointer to
3642 * such an already freed array. See bug #13813.
3644 static_data [i] = NULL;
3645 mono_memory_write_barrier ();
3646 if (mono_gc_user_markers_supported () && threadlocal)
3649 mono_gc_free_fixed (p);
3651 mono_gc_free_fixed (static_data);
3655 * mono_init_static_data_info
3657 * Initializes static data counters
3659 static void mono_init_static_data_info (StaticDataInfo *static_data)
3661 static_data->idx = 0;
3662 static_data->offset = 0;
3663 static_data->freelist = NULL;
3667 * mono_alloc_static_data_slot
3669 * Generates an offset for static data. static_data contains the counters
3670 * used to generate it.
3673 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3677 if (!static_data->idx && !static_data->offset) {
3679 * we use the first chunk of the first allocation also as
3680 * an array for the rest of the data
3682 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3684 static_data->offset += align - 1;
3685 static_data->offset &= ~(align - 1);
3686 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3687 static_data->idx ++;
3688 g_assert (size <= static_data_size [static_data->idx]);
3689 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3690 static_data->offset = 0;
3692 offset = static_data->offset | ((static_data->idx + 1) << 24);
3693 static_data->offset += size;
3698 * ensure thread static fields already allocated are valid for thread
3699 * This function is called when a thread is created or on thread attach.
3702 thread_adjust_static_data (MonoInternalThread *thread)
3706 mono_threads_lock ();
3707 if (thread_static_info.offset || thread_static_info.idx > 0) {
3708 /* get the current allocated size */
3709 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3710 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3712 mono_threads_unlock ();
3716 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3718 MonoInternalThread *thread = value;
3719 guint32 offset = GPOINTER_TO_UINT (user);
3721 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3724 static MonoThreadDomainTls*
3725 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3727 MonoThreadDomainTls* prev = NULL;
3728 MonoThreadDomainTls* tmp = static_data->freelist;
3730 if (tmp->size == size) {
3732 prev->next = tmp->next;
3734 static_data->freelist = tmp->next;
3744 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3747 int idx = (offset >> 24) - 1;
3749 if (!static_reference_bitmaps [idx])
3750 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3751 rb = static_reference_bitmaps [idx];
3753 offset /= sizeof (gpointer);
3754 /* offset is now the bitmap offset */
3755 for (i = 0; i < numbits; ++i) {
3756 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3757 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3762 clear_reference_bitmap (guint32 offset, guint32 size)
3764 int idx = (offset >> 24) - 1;
3766 rb = static_reference_bitmaps [idx];
3768 offset /= sizeof (gpointer);
3769 size /= sizeof (gpointer);
3771 /* offset is now the bitmap offset */
3772 for (; offset < size; ++offset)
3773 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3777 * The offset for a special static variable is composed of three parts:
3778 * a bit that indicates the type of static data (0:thread, 1:context),
3779 * an index in the array of chunks of memory for the thread (thread->static_data)
3780 * and an offset in that chunk of mem. This allows allocating less memory in the
3785 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3788 if (static_type == SPECIAL_STATIC_THREAD) {
3789 MonoThreadDomainTls *item;
3790 mono_threads_lock ();
3791 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3792 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3794 offset = item->offset;
3797 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3799 update_tls_reference_bitmap (offset, bitmap, numbits);
3800 /* This can be called during startup */
3801 if (threads != NULL)
3802 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3803 mono_threads_unlock ();
3805 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3806 mono_contexts_lock ();
3807 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3808 mono_contexts_unlock ();
3809 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3815 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3817 /* The high bit means either thread (0) or static (1) data. */
3819 guint32 static_type = (offset & 0x80000000);
3822 offset &= 0x7fffffff;
3823 idx = (offset >> 24) - 1;
3825 if (static_type == 0) {
3826 return get_thread_static_data (thread, offset);
3828 /* Allocate static data block under demand, since we don't have a list
3831 MonoAppContext *context = mono_context_get ();
3832 if (!context->static_data || !context->static_data [idx]) {
3833 mono_contexts_lock ();
3834 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3835 mono_contexts_unlock ();
3837 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3842 mono_get_special_static_data (guint32 offset)
3844 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3853 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3855 MonoInternalThread *thread = value;
3856 TlsOffsetSize *data = user;
3857 int idx = (data->offset >> 24) - 1;
3860 if (!thread->static_data || !thread->static_data [idx])
3862 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3863 mono_gc_bzero_atomic (ptr, data->size);
3867 do_free_special_slot (guint32 offset, guint32 size)
3869 guint32 static_type = (offset & 0x80000000);
3870 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3871 if (static_type == 0) {
3873 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3874 data.offset = offset & 0x7fffffff;
3876 clear_reference_bitmap (data.offset, data.size);
3877 if (threads != NULL)
3878 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3879 item->offset = offset;
3882 if (!mono_runtime_is_shutting_down ()) {
3883 item->next = thread_static_info.freelist;
3884 thread_static_info.freelist = item;
3886 /* We could be called during shutdown after mono_thread_cleanup () is called */
3890 /* FIXME: free context static data as well */
3895 do_free_special (gpointer key, gpointer value, gpointer data)
3897 MonoClassField *field = key;
3898 guint32 offset = GPOINTER_TO_UINT (value);
3901 size = mono_type_size (field->type, &align);
3902 do_free_special_slot (offset, size);
3906 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3908 mono_threads_lock ();
3909 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3910 mono_threads_unlock ();
3914 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3916 mono_threads_lock ();
3917 do_free_special_slot (offset, size);
3918 mono_threads_unlock ();
3922 * allocates room in the thread local area for storing an instance of the struct type
3923 * the allocation is kept track of in domain->tlsrec_list.
3926 mono_thread_alloc_tls (MonoReflectionType *type)
3928 MonoDomain *domain = mono_domain_get ();
3930 MonoTlsDataRecord *tlsrec;
3933 gsize default_bitmap [4] = {0};
3934 uint32_t tls_offset;
3938 klass = mono_class_from_mono_type (type->type);
3939 /* TlsDatum is a struct, so we subtract the object header size offset */
3940 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3941 size = mono_type_size (type->type, &align);
3942 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3943 if (bitmap != default_bitmap)
3945 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3946 tlsrec->tls_offset = tls_offset;
3947 tlsrec->size = size;
3948 mono_domain_lock (domain);
3949 tlsrec->next = domain->tlsrec_list;
3950 domain->tlsrec_list = tlsrec;
3951 mono_domain_unlock (domain);
3956 mono_thread_destroy_tls (uint32_t tls_offset)
3958 MonoTlsDataRecord *prev = NULL;
3959 MonoTlsDataRecord *cur;
3961 MonoDomain *domain = mono_domain_get ();
3962 mono_domain_lock (domain);
3963 cur = domain->tlsrec_list;
3965 if (cur->tls_offset == tls_offset) {
3967 prev->next = cur->next;
3969 domain->tlsrec_list = cur->next;
3977 mono_domain_unlock (domain);
3979 mono_special_static_data_free_slot (tls_offset, size);
3983 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3986 mono_thread_destroy_domain_tls (MonoDomain *domain)
3988 while (domain->tlsrec_list)
3989 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3992 static MonoClassField *local_slots = NULL;
3995 /* local tls data to get locals_slot from a thread */
3998 /* index in the locals_slot array */
4003 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4005 LocalSlotID *sid = user_data;
4006 MonoInternalThread *thread = (MonoInternalThread*)value;
4007 MonoArray *slots_array;
4009 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4010 * it is for the right domain, so we need to check if it is allocated an initialized
4011 * for the current thread.
4013 /*g_print ("handling thread %p\n", thread);*/
4014 if (!thread->static_data || !thread->static_data [sid->idx])
4016 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4017 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4019 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4023 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4031 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4033 g_warning ("local_slots field not found in Thread class");
4037 domain = mono_domain_get ();
4038 mono_domain_lock (domain);
4039 if (domain->special_static_fields)
4040 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4041 mono_domain_unlock (domain);
4044 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4045 sid.offset = GPOINTER_TO_UINT (addr);
4046 sid.offset &= 0x7fffffff;
4047 sid.idx = (sid.offset >> 24) - 1;
4048 mono_threads_lock ();
4049 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4050 mono_threads_unlock ();
4052 /* FIXME: clear the slot for MonoAppContexts, too */
4057 static void CALLBACK dummy_apc (ULONG_PTR param)
4063 * mono_thread_execute_interruption
4065 * Performs the operation that the requested thread state requires (abort,
4068 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4070 LOCK_THREAD (thread);
4072 /* MonoThread::interruption_requested can only be changed with atomics */
4073 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4074 /* this will consume pending APC calls */
4076 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4078 InterlockedDecrement (&thread_interruption_requested);
4080 /* Clear the interrupted flag of the thread so it can wait again */
4081 wapi_clear_interruption ();
4085 if ((thread->state & ThreadState_AbortRequested) != 0) {
4086 UNLOCK_THREAD (thread);
4087 if (thread->abort_exc == NULL) {
4089 * This might be racy, but it has to be called outside the lock
4090 * since it calls managed code.
4092 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4094 return thread->abort_exc;
4096 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4097 self_suspend_internal (thread);
4100 else if ((thread->state & ThreadState_StopRequested) != 0) {
4101 /* FIXME: do this through the JIT? */
4103 UNLOCK_THREAD (thread);
4105 mono_thread_exit ();
4107 } else if (thread->pending_exception) {
4110 exc = thread->pending_exception;
4111 thread->pending_exception = NULL;
4113 UNLOCK_THREAD (thread);
4115 } else if (thread->thread_interrupt_requested) {
4117 thread->thread_interrupt_requested = FALSE;
4118 UNLOCK_THREAD (thread);
4120 return(mono_get_exception_thread_interrupted ());
4123 UNLOCK_THREAD (thread);
4129 * mono_thread_request_interruption
4131 * A signal handler can call this method to request the interruption of a
4132 * thread. The result of the interruption will depend on the current state of
4133 * the thread. If the result is an exception that needs to be throw, it is
4134 * provided as return value.
4137 mono_thread_request_interruption (gboolean running_managed)
4139 MonoInternalThread *thread = mono_thread_internal_current ();
4141 /* The thread may already be stopping */
4146 if (thread->interrupt_on_stop &&
4147 thread->state & ThreadState_StopRequested &&
4148 thread->state & ThreadState_Background)
4152 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4154 InterlockedIncrement (&thread_interruption_requested);
4156 if (!running_managed || is_running_protected_wrapper ()) {
4157 /* Can't stop while in unmanaged code. Increase the global interruption
4158 request count. When exiting the unmanaged method the count will be
4159 checked and the thread will be interrupted. */
4161 if (mono_thread_notify_pending_exc_fn && !running_managed)
4162 /* The JIT will notify the thread about the interruption */
4163 /* This shouldn't take any locks */
4164 mono_thread_notify_pending_exc_fn ();
4166 /* this will awake the thread if it is in WaitForSingleObject
4168 /* Our implementation of this function ignores the func argument */
4170 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4172 wapi_self_interrupt ();
4177 return mono_thread_execute_interruption (thread);
4181 /*This function should be called by a thread after it has exited all of
4182 * its handle blocks at interruption time.*/
4184 mono_thread_resume_interruption (void)
4186 MonoInternalThread *thread = mono_thread_internal_current ();
4187 gboolean still_aborting;
4189 /* The thread may already be stopping */
4193 LOCK_THREAD (thread);
4194 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4195 UNLOCK_THREAD (thread);
4197 /*This can happen if the protected block called Thread::ResetAbort*/
4198 if (!still_aborting)
4201 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4203 InterlockedIncrement (&thread_interruption_requested);
4206 wapi_self_interrupt ();
4208 return mono_thread_execute_interruption (thread);
4211 gboolean mono_thread_interruption_requested ()
4213 if (thread_interruption_requested) {
4214 MonoInternalThread *thread = mono_thread_internal_current ();
4215 /* The thread may already be stopping */
4217 return (thread->interruption_requested);
4222 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4224 MonoInternalThread *thread = mono_thread_internal_current ();
4226 /* The thread may already be stopping */
4230 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4231 MonoException* exc = mono_thread_execute_interruption (thread);
4232 if (exc) mono_raise_exception (exc);
4237 * Performs the interruption of the current thread, if one has been requested,
4238 * and the thread is not running a protected wrapper.
4240 void mono_thread_interruption_checkpoint ()
4242 mono_thread_interruption_checkpoint_request (FALSE);
4246 * Performs the interruption of the current thread, if one has been requested.
4248 void mono_thread_force_interruption_checkpoint ()
4250 mono_thread_interruption_checkpoint_request (TRUE);
4254 * mono_thread_get_and_clear_pending_exception:
4256 * Return any pending exceptions for the current thread and clear it as a side effect.
4259 mono_thread_get_and_clear_pending_exception (void)
4261 MonoInternalThread *thread = mono_thread_internal_current ();
4263 /* The thread may already be stopping */
4267 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4268 return mono_thread_execute_interruption (thread);
4271 if (thread->pending_exception) {
4272 MonoException *exc = thread->pending_exception;
4274 thread->pending_exception = NULL;
4282 * mono_set_pending_exception:
4284 * Set the pending exception of the current thread to EXC.
4285 * The exception will be thrown when execution returns to managed code.
4288 mono_set_pending_exception (MonoException *exc)
4290 MonoInternalThread *thread = mono_thread_internal_current ();
4292 /* The thread may already be stopping */
4296 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4298 mono_thread_request_interruption (FALSE);
4302 * mono_thread_interruption_request_flag:
4304 * Returns the address of a flag that will be non-zero if an interruption has
4305 * been requested for a thread. The thread to interrupt may not be the current
4306 * thread, so an additional call to mono_thread_interruption_requested() or
4307 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4310 gint32* mono_thread_interruption_request_flag ()
4312 return &thread_interruption_requested;
4316 mono_thread_init_apartment_state (void)
4319 MonoInternalThread* thread = mono_thread_internal_current ();
4321 /* Positive return value indicates success, either
4322 * S_OK if this is first CoInitialize call, or
4323 * S_FALSE if CoInitialize already called, but with same
4324 * threading model. A negative value indicates failure,
4325 * probably due to trying to change the threading model.
4327 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4328 ? COINIT_APARTMENTTHREADED
4329 : COINIT_MULTITHREADED) < 0) {
4330 thread->apartment_state = ThreadApartmentState_Unknown;
4336 mono_thread_cleanup_apartment_state (void)
4339 MonoInternalThread* thread = mono_thread_internal_current ();
4341 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4348 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4350 LOCK_THREAD (thread);
4351 thread->state |= state;
4352 UNLOCK_THREAD (thread);
4356 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4358 LOCK_THREAD (thread);
4359 thread->state &= ~state;
4360 UNLOCK_THREAD (thread);
4364 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4366 gboolean ret = FALSE;
4368 LOCK_THREAD (thread);
4370 if ((thread->state & test) != 0) {
4374 UNLOCK_THREAD (thread);
4379 //static MonoClassField *execution_context_field;
4382 get_execution_context_addr (void)
4384 MonoDomain *domain = mono_domain_get ();
4385 guint32 offset = domain->execution_context_field_offset;
4388 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4391 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4393 mono_domain_lock (domain);
4394 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4395 mono_domain_unlock (domain);
4398 domain->execution_context_field_offset = offset;
4401 return (MonoObject**) mono_get_special_static_data (offset);
4405 mono_thread_get_execution_context (void)
4407 return *get_execution_context_addr ();
4411 mono_thread_set_execution_context (MonoObject *ec)
4413 *get_execution_context_addr () = ec;
4416 static gboolean has_tls_get = FALSE;
4419 mono_runtime_set_has_tls_get (gboolean val)
4425 mono_runtime_has_tls_get (void)
4431 mono_thread_kill (MonoInternalThread *thread, int signal)
4433 #ifdef __native_client__
4434 /* Workaround pthread_kill abort() in NaCl glibc. */
4438 /* Win32 uses QueueUserAPC and callers of this are guarded */
4439 g_assert_not_reached ();
4441 # ifdef PTHREAD_POINTER_ID
4442 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4444 # ifdef PLATFORM_ANDROID
4445 if (thread->android_tid != 0) {
4447 int old_errno = errno;
4449 ret = tkill ((pid_t) thread->android_tid, signal);
4458 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4460 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4467 self_interrupt_thread (void *_unused)
4469 MonoThreadInfo *info = mono_thread_info_current ();
4470 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4471 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4472 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4473 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4477 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4481 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4485 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4487 MonoJitInfo **dest = data;
4493 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4495 MonoJitInfo *ji = NULL;
4498 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4503 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4506 MonoThreadInfo *info = NULL;
4507 gboolean protected_wrapper;
4508 gboolean running_managed;
4510 if (!mono_thread_info_new_interrupt_enabled ()) {
4511 signal_thread_state_change (thread);
4516 FIXME this is insanely broken, it doesn't cause interruption to happen
4517 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4519 if (thread == mono_thread_internal_current ()) {
4520 /* Do it synchronously */
4521 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4523 mono_raise_exception (exc);
4525 wapi_interrupt_thread (thread->handle);
4530 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4531 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4535 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4536 mono_thread_info_finish_suspend_and_resume (info);
4540 /*someone is already interrupting it*/
4541 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4542 mono_thread_info_finish_suspend_and_resume (info);
4545 InterlockedIncrement (&thread_interruption_requested);
4547 ji = mono_thread_info_get_last_managed (info);
4548 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4549 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4551 if (!protected_wrapper && running_managed) {
4552 /*We are in managed code*/
4553 /*Set the thread to call */
4554 if (install_async_abort)
4555 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4556 mono_thread_info_finish_suspend_and_resume (info);
4558 gpointer interrupt_handle;
4560 * This will cause waits to be broken.
4561 * It will also prevent the thread from entering a wait, so if the thread returns
4562 * from the wait before it receives the abort signal, it will just spin in the wait
4563 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4567 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4569 mono_thread_info_finish_suspend_and_resume (info);
4571 wapi_finish_interrupt_thread (interrupt_handle);
4574 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4578 transition_to_suspended (MonoInternalThread *thread, MonoThreadInfo *info)
4580 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4581 g_assert (0); /*FIXME we should not reach this */
4582 /*Make sure we balance the suspend count.*/
4584 mono_thread_info_finish_suspend_and_resume (info);
4586 thread->state &= ~ThreadState_SuspendRequested;
4587 thread->state |= ThreadState_Suspended;
4589 mono_thread_info_finish_suspend (info);
4591 UNLOCK_THREAD (thread);
4595 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4597 if (!mono_thread_info_new_interrupt_enabled ()) {
4598 signal_thread_state_change (thread);
4602 LOCK_THREAD (thread);
4603 if (thread == mono_thread_internal_current ()) {
4604 transition_to_suspended (thread, NULL);
4605 mono_thread_info_self_suspend ();
4607 MonoThreadInfo *info;
4609 gboolean protected_wrapper;
4610 gboolean running_managed;
4612 /*A null info usually means the thread is already dead. */
4613 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4614 UNLOCK_THREAD (thread);
4618 ji = mono_thread_info_get_last_managed (info);
4619 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4620 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4622 if (running_managed && !protected_wrapper) {
4623 transition_to_suspended (thread, info);
4625 gpointer interrupt_handle;
4627 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4628 InterlockedIncrement (&thread_interruption_requested);
4631 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4633 mono_thread_info_finish_suspend_and_resume (info);
4636 wapi_finish_interrupt_thread (interrupt_handle);
4638 UNLOCK_THREAD (thread);
4643 /*This is called with @thread synch_cs held and it must release it*/
4645 self_suspend_internal (MonoInternalThread *thread)
4647 if (!mono_thread_info_new_interrupt_enabled ()) {
4648 thread->state &= ~ThreadState_SuspendRequested;
4649 thread->state |= ThreadState_Suspended;
4650 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4651 if (thread->suspend_event == NULL) {
4652 UNLOCK_THREAD (thread);
4655 if (thread->suspended_event)
4656 SetEvent (thread->suspended_event);
4658 UNLOCK_THREAD (thread);
4660 if (shutting_down) {
4661 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4666 WaitForSingleObject (thread->suspend_event, INFINITE);
4668 LOCK_THREAD (thread);
4670 CloseHandle (thread->suspend_event);
4671 thread->suspend_event = NULL;
4672 thread->state &= ~ThreadState_Suspended;
4674 /* The thread that requested the resume will have replaced this event
4675 * and will be waiting for it
4677 SetEvent (thread->resume_event);
4679 UNLOCK_THREAD (thread);
4683 transition_to_suspended (thread, NULL);
4684 mono_thread_info_self_suspend ();
4687 /*This is called with @thread synch_cs held and it must release it*/
4689 resume_thread_internal (MonoInternalThread *thread)
4691 if (!mono_thread_info_new_interrupt_enabled ()) {
4692 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4693 if (thread->resume_event == NULL) {
4694 UNLOCK_THREAD (thread);
4698 /* Awake the thread */
4699 SetEvent (thread->suspend_event);
4701 UNLOCK_THREAD (thread);
4703 /* Wait for the thread to awake */
4704 WaitForSingleObject (thread->resume_event, INFINITE);
4705 CloseHandle (thread->resume_event);
4706 thread->resume_event = NULL;
4710 UNLOCK_THREAD (thread);
4711 /* Awake the thread */
4712 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4714 LOCK_THREAD (thread);
4715 thread->state &= ~ThreadState_Suspended;
4716 UNLOCK_THREAD (thread);
4722 * mono_thread_is_foreign:
4723 * @thread: the thread to query
4725 * This function allows one to determine if a thread was created by the mono runtime and has
4726 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4728 * Returns: true if @thread was not created by the runtime.
4731 mono_thread_is_foreign (MonoThread *thread)
4733 MonoThreadInfo *info = thread->internal_thread->thread_info;
4734 return info->runtime_thread == FALSE;
4738 * mono_add_joinable_thread:
4740 * Add TID to the list of joinable threads.
4741 * LOCKING: Acquires the threads lock.
4744 mono_threads_add_joinable_thread (gpointer tid)
4748 * We cannot detach from threads because it causes problems like
4749 * 2fd16f60/r114307. So we collect them and join them when
4750 * we have time (in he finalizer thread).
4752 joinable_threads_lock ();
4753 if (!joinable_threads)
4754 joinable_threads = g_hash_table_new (NULL, NULL);
4755 g_hash_table_insert (joinable_threads, tid, tid);
4756 joinable_thread_count ++;
4757 joinable_threads_unlock ();
4759 mono_gc_finalize_notify ();
4764 * mono_threads_join_threads:
4766 * Join all joinable threads. This is called from the finalizer thread.
4767 * LOCKING: Acquires the threads lock.
4770 mono_threads_join_threads (void)
4773 GHashTableIter iter;
4780 if (!joinable_thread_count)
4784 joinable_threads_lock ();
4786 if (g_hash_table_size (joinable_threads)) {
4787 g_hash_table_iter_init (&iter, joinable_threads);
4788 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4789 thread = (pthread_t)tid;
4790 g_hash_table_remove (joinable_threads, key);
4791 joinable_thread_count --;
4794 joinable_threads_unlock ();
4796 if (thread != pthread_self ())
4797 /* This shouldn't block */
4798 pthread_join (thread, NULL);
4809 * Wait for thread TID to exit.
4810 * LOCKING: Acquires the threads lock.
4813 mono_thread_join (gpointer tid)
4817 gboolean found = FALSE;
4819 joinable_threads_lock ();
4820 if (!joinable_threads)
4821 joinable_threads = g_hash_table_new (NULL, NULL);
4822 if (g_hash_table_lookup (joinable_threads, tid)) {
4823 g_hash_table_remove (joinable_threads, tid);
4824 joinable_thread_count --;
4827 joinable_threads_unlock ();
4830 thread = (pthread_t)tid;
4831 pthread_join (thread, NULL);