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 #if defined(__OpenBSD__)
22 #include <pthread_np.h>
25 #include <mono/metadata/object.h>
26 #include <mono/metadata/domain-internals.h>
27 #include <mono/metadata/profiler-private.h>
28 #include <mono/metadata/threads.h>
29 #include <mono/metadata/threadpool.h>
30 #include <mono/metadata/threads-types.h>
31 #include <mono/metadata/exception.h>
32 #include <mono/metadata/environment.h>
33 #include <mono/metadata/monitor.h>
34 #include <mono/metadata/gc-internal.h>
35 #include <mono/metadata/marshal.h>
36 #include <mono/io-layer/io-layer.h>
38 #include <mono/io-layer/threads.h>
40 #include <mono/metadata/object-internals.h>
41 #include <mono/metadata/mono-debug-debugger.h>
42 #include <mono/utils/mono-compiler.h>
43 #include <mono/utils/mono-mmap.h>
44 #include <mono/utils/mono-membar.h>
45 #include <mono/utils/mono-time.h>
46 #include <mono/utils/mono-threads.h>
47 #include <mono/utils/hazard-pointer.h>
48 #include <mono/utils/mono-tls.h>
50 #include <mono/metadata/gc-internal.h>
52 #ifdef PLATFORM_ANDROID
55 extern int tkill (pid_t tid, int signal);
58 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
59 #define THREAD_DEBUG(a)
60 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
61 #define THREAD_WAIT_DEBUG(a)
62 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
63 #define LIBGC_DEBUG(a)
65 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
66 #define SPIN_LOCK(i) do { \
67 if (SPIN_TRYLOCK (i)) \
71 #define SPIN_UNLOCK(i) i = 0
73 /* Provide this for systems with glib < 2.6 */
74 #ifndef G_GSIZE_FORMAT
75 # if GLIB_SIZEOF_LONG == 8
76 # define G_GSIZE_FORMAT "lu"
78 # define G_GSIZE_FORMAT "u"
84 guint32 (*func)(void *);
100 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
101 struct _MonoThreadDomainTls {
102 MonoThreadDomainTls *next;
110 MonoThreadDomainTls *freelist;
113 /* Number of cached culture objects in the MonoThread->cached_culture_info array
114 * (per-type): we use the first NUM entries for CultureInfo and the last for
115 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
117 #define NUM_CACHED_CULTURES 4
118 #define CULTURES_START_IDX 0
119 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
121 /* Controls access to the 'threads' hash table */
122 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
123 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
124 static CRITICAL_SECTION threads_mutex;
126 /* Controls access to context static data */
127 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
128 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
129 static CRITICAL_SECTION contexts_mutex;
131 /* Holds current status of static data heap */
132 static StaticDataInfo thread_static_info;
133 static StaticDataInfo context_static_info;
135 /* The hash of existing threads (key is thread ID, value is
136 * MonoInternalThread*) that need joining before exit
138 static MonoGHashTable *threads=NULL;
141 * Threads which are starting up and they are not in the 'threads' hash yet.
142 * When handle_store is called for a thread, it will be removed from this hash table.
143 * Protected by mono_threads_lock ().
145 static MonoGHashTable *threads_starting_up = NULL;
147 /* Maps a MonoThread to its start argument */
148 /* Protected by mono_threads_lock () */
149 static MonoGHashTable *thread_start_args = NULL;
151 /* The TLS key that holds the MonoObject assigned to each thread */
152 static MonoNativeTlsKey current_object_key;
154 #ifdef MONO_HAVE_FAST_TLS
155 /* we need to use both the Tls* functions and __thread because
156 * the gc needs to see all the threads
158 MONO_FAST_TLS_DECLARE(tls_current_object);
159 #define SET_CURRENT_OBJECT(x) do { \
160 MONO_FAST_TLS_SET (tls_current_object, x); \
161 mono_native_tls_set_value (current_object_key, x); \
163 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
165 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
166 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
169 /* function called at thread start */
170 static MonoThreadStartCB mono_thread_start_cb = NULL;
172 /* function called at thread attach */
173 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
175 /* function called at thread cleanup */
176 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
178 /* function called to notify the runtime about a pending exception on the current thread */
179 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
181 /* The default stack size for each thread */
182 static guint32 default_stacksize = 0;
183 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
185 static void thread_adjust_static_data (MonoInternalThread *thread);
186 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
187 static void mono_init_static_data_info (StaticDataInfo *static_data);
188 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
189 static gboolean mono_thread_resume (MonoInternalThread* thread);
190 static void mono_thread_start (MonoThread *thread);
191 static void signal_thread_state_change (MonoInternalThread *thread);
192 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
193 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
194 static void self_suspend_internal (MonoInternalThread *thread);
195 static gboolean resume_thread_internal (MonoInternalThread *thread);
197 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
198 static void ref_stack_destroy (gpointer rs);
200 /* Spin lock for InterlockedXXX 64 bit functions */
201 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
202 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
203 static CRITICAL_SECTION interlocked_mutex;
205 /* global count of thread interruptions requested */
206 static gint32 thread_interruption_requested = 0;
208 /* Event signaled when a thread changes its background mode */
209 static HANDLE background_change_event;
211 static gboolean shutting_down = FALSE;
213 static gint32 managed_thread_id_counter = 0;
216 get_next_managed_thread_id (void)
218 return InterlockedIncrement (&managed_thread_id_counter);
222 mono_thread_get_tls_key (void)
224 return current_object_key;
228 mono_thread_get_tls_offset (void)
231 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
235 /* handle_store() and handle_remove() manage the array of threads that
236 * still need to be waited for when the main thread exits.
238 * If handle_store() returns FALSE the thread must not be started
239 * because Mono is shutting down.
241 static gboolean handle_store(MonoThread *thread)
243 mono_threads_lock ();
245 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
247 if (threads_starting_up)
248 mono_g_hash_table_remove (threads_starting_up, thread);
251 mono_threads_unlock ();
256 MONO_GC_REGISTER_ROOT_FIXED (threads);
257 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
260 /* We don't need to duplicate thread->handle, because it is
261 * only closed when the thread object is finalized by the GC.
263 g_assert (thread->internal_thread);
264 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
265 thread->internal_thread);
267 mono_threads_unlock ();
272 static gboolean handle_remove(MonoInternalThread *thread)
275 gsize tid = thread->tid;
277 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
279 mono_threads_lock ();
282 /* We have to check whether the thread object for the
283 * tid is still the same in the table because the
284 * thread might have been destroyed and the tid reused
285 * in the meantime, in which case the tid would be in
286 * the table, but with another thread object.
288 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
289 mono_g_hash_table_remove (threads, (gpointer)tid);
298 mono_threads_unlock ();
300 /* Don't close the handle here, wait for the object finalizer
301 * to do it. Otherwise, the following race condition applies:
303 * 1) Thread exits (and handle_remove() closes the handle)
305 * 2) Some other handle is reassigned the same slot
307 * 3) Another thread tries to join the first thread, and
308 * blocks waiting for the reassigned handle to be signalled
309 * (which might never happen). This is possible, because the
310 * thread calling Join() still has a reference to the first
316 static void ensure_synch_cs_set (MonoInternalThread *thread)
318 CRITICAL_SECTION *synch_cs;
320 if (thread->synch_cs != NULL) {
324 synch_cs = g_new0 (CRITICAL_SECTION, 1);
325 InitializeCriticalSection (synch_cs);
327 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
328 synch_cs, NULL) != NULL) {
329 /* Another thread must have installed this CS */
330 DeleteCriticalSection (synch_cs);
336 * NOTE: this function can be called also for threads different from the current one:
337 * make sure no code called from it will ever assume it is run on the thread that is
338 * getting cleaned up.
340 static void thread_cleanup (MonoInternalThread *thread)
342 g_assert (thread != NULL);
344 if (thread->abort_state_handle) {
345 mono_gchandle_free (thread->abort_state_handle);
346 thread->abort_state_handle = 0;
348 thread->abort_exc = NULL;
349 thread->current_appcontext = NULL;
352 * This is necessary because otherwise we might have
353 * cross-domain references which will not get cleaned up when
354 * the target domain is unloaded.
356 if (thread->cached_culture_info) {
358 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
359 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
362 /* if the thread is not in the hash it has been removed already */
363 if (!handle_remove (thread)) {
364 /* This needs to be called even if handle_remove () fails */
365 if (mono_thread_cleanup_fn)
366 mono_thread_cleanup_fn (thread);
369 mono_release_type_locks (thread);
371 ensure_synch_cs_set (thread);
373 EnterCriticalSection (thread->synch_cs);
375 thread->state |= ThreadState_Stopped;
376 thread->state &= ~ThreadState_Background;
378 LeaveCriticalSection (thread->synch_cs);
380 mono_profiler_thread_end (thread->tid);
382 if (thread == mono_thread_internal_current ())
383 mono_thread_pop_appdomain_ref ();
385 thread->cached_culture_info = NULL;
387 mono_free_static_data (thread->static_data, TRUE);
388 thread->static_data = NULL;
389 ref_stack_destroy (thread->appdomain_refs);
390 thread->appdomain_refs = NULL;
392 if (mono_thread_cleanup_fn)
393 mono_thread_cleanup_fn (thread);
395 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
399 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
402 g_assert ((offset & 0x80000000) == 0);
403 offset &= 0x7fffffff;
404 idx = (offset >> 24) - 1;
405 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
409 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
411 static MonoClassField *current_thread_field = NULL;
415 if (!current_thread_field) {
416 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
417 g_assert (current_thread_field);
420 mono_class_vtable (domain, mono_defaults.thread_class);
421 mono_domain_lock (domain);
422 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
423 mono_domain_unlock (domain);
426 return get_thread_static_data (thread, offset);
430 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
432 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
434 g_assert (current->obj.vtable->domain == domain);
436 g_assert (!*current_thread_ptr);
437 *current_thread_ptr = current;
440 static MonoInternalThread*
441 create_internal_thread_object (void)
443 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
444 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
448 create_thread_object (MonoDomain *domain)
450 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
451 return (MonoThread*)mono_gc_alloc_mature (vt);
455 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
457 MonoThread *thread = create_thread_object (domain);
458 MONO_OBJECT_SETREF (thread, internal_thread, internal);
463 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
465 MonoDomain *domain = mono_get_root_domain ();
467 if (!candidate || candidate->obj.vtable->domain != domain)
468 candidate = new_thread_with_internal (domain, thread);
469 set_current_thread_for_domain (domain, thread, candidate);
470 g_assert (!thread->root_domain_thread);
471 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
474 static guint32 WINAPI start_wrapper_internal(void *data)
476 MonoThreadInfo *info;
477 struct StartInfo *start_info=(struct StartInfo *)data;
478 guint32 (*start_func)(void *);
482 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
485 MonoInternalThread *internal = start_info->obj->internal_thread;
486 MonoObject *start_delegate = start_info->delegate;
487 MonoDomain *domain = start_info->obj->obj.vtable->domain;
489 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
491 /* We can be sure start_info->obj->tid and
492 * start_info->obj->handle have been set, because the thread
493 * was created suspended, and these values were set before the
497 info = mono_thread_info_current ();
499 internal->thread_info = info;
504 SET_CURRENT_OBJECT (internal);
506 mono_monitor_init_tls ();
508 /* Every thread references the appdomain which created it */
509 mono_thread_push_appdomain_ref (domain);
511 if (!mono_domain_set (domain, FALSE)) {
512 /* No point in raising an appdomain_unloaded exception here */
513 /* FIXME: Cleanup here */
514 mono_thread_pop_appdomain_ref ();
518 start_func = start_info->func;
519 start_arg = start_info->start_arg;
521 /* We have to do this here because mono_thread_new_init()
522 requires that root_domain_thread is set up. */
523 thread_adjust_static_data (internal);
524 init_root_domain_thread (internal, start_info->obj);
526 /* This MUST be called before any managed code can be
527 * executed, as it calls the callback function that (for the
528 * jit) sets the lmf marker.
530 mono_thread_new_init (tid, &tid, start_func);
531 internal->stack_ptr = &tid;
533 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
535 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
537 /* On 2.0 profile (and higher), set explicitly since state might have been
539 if (internal->apartment_state == ThreadApartmentState_Unknown)
540 internal->apartment_state = ThreadApartmentState_MTA;
542 mono_thread_init_apartment_state ();
544 if(internal->start_notify!=NULL) {
545 /* Let the thread that called Start() know we're
548 ReleaseSemaphore (internal->start_notify, 1, NULL);
551 mono_threads_lock ();
552 mono_g_hash_table_remove (thread_start_args, start_info->obj);
553 mono_threads_unlock ();
555 mono_thread_set_execution_context (start_info->obj->ec_to_set);
556 start_info->obj->ec_to_set = NULL;
559 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
563 * Call this after calling start_notify, since the profiler callback might want
564 * to lock the thread, and the lock is held by thread_start () which waits for
567 mono_profiler_thread_start (tid);
569 /* start_func is set only for unmanaged start functions */
571 start_func (start_arg);
574 g_assert (start_delegate != NULL);
575 args [0] = start_arg;
576 /* we may want to handle the exception here. See comment below on unhandled exceptions */
577 mono_runtime_delegate_invoke (start_delegate, args, NULL);
580 /* If the thread calls ExitThread at all, this remaining code
581 * will not be executed, but the main thread will eventually
582 * call thread_cleanup() on this thread's behalf.
585 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
587 thread_cleanup (internal);
589 /* Do any cleanup needed for apartment state. This
590 * cannot be done in thread_cleanup since thread_cleanup could be
591 * called for a thread other than the current thread.
592 * mono_thread_cleanup_apartment_state cleans up apartment
593 * for the current thead */
594 mono_thread_cleanup_apartment_state ();
596 /* Remove the reference to the thread object in the TLS data,
597 * so the thread object can be finalized. This won't be
598 * reached if the thread threw an uncaught exception, so those
599 * thread handles will stay referenced :-( (This is due to
600 * missing support for scanning thread-specific data in the
601 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
604 SET_CURRENT_OBJECT (NULL);
605 mono_domain_unset ();
610 static guint32 WINAPI start_wrapper(void *data)
615 /* Avoid scanning the frames above this frame during a GC */
616 mono_gc_set_stack_end ((void*)&dummy);
619 return start_wrapper_internal (data);
622 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
624 if (mono_thread_start_cb) {
625 mono_thread_start_cb (tid, stack_start, func);
629 void mono_threads_set_default_stacksize (guint32 stacksize)
631 default_stacksize = stacksize;
634 guint32 mono_threads_get_default_stacksize (void)
636 return default_stacksize;
640 * mono_create_thread:
642 * This is a wrapper around CreateThread which handles differences in the type of
643 * the the 'tid' argument.
645 gpointer mono_create_thread (WapiSecurityAttributes *security,
646 guint32 stacksize, WapiThreadStart start,
647 gpointer param, guint32 create, gsize *tid)
654 res = mono_threads_CreateThread (security, stacksize, start, param, create, &real_tid);
658 res = CreateThread (security, stacksize, start, param, create, tid);
665 * The thread start argument may be an object reference, and there is
666 * no ref to keep it alive when the new thread is started but not yet
667 * registered with the collector. So we store it in a GC tracked hash
670 * LOCKING: Assumes the threads lock is held.
673 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
675 if (thread_start_args == NULL) {
676 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
677 thread_start_args = mono_g_hash_table_new (NULL, NULL);
679 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
682 MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
685 MonoInternalThread *internal;
686 HANDLE thread_handle;
687 struct StartInfo *start_info;
690 thread = create_thread_object (domain);
691 internal = create_internal_thread_object ();
692 MONO_OBJECT_SETREF (thread, internal_thread, internal);
694 start_info=g_new0 (struct StartInfo, 1);
695 start_info->func = func;
696 start_info->obj = thread;
697 start_info->start_arg = arg;
699 mono_threads_lock ();
701 mono_threads_unlock ();
705 if (threads_starting_up == NULL) {
706 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
707 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
710 register_thread_start_argument (thread, start_info);
711 mono_g_hash_table_insert (threads_starting_up, thread, thread);
712 mono_threads_unlock ();
715 stack_size = default_stacksize_for_thread (internal);
717 /* Create suspended, so we can do some housekeeping before the thread
720 thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
721 CREATE_SUSPENDED, &tid);
722 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
723 if (thread_handle == NULL) {
724 /* The thread couldn't be created, so throw an exception */
725 mono_threads_lock ();
726 mono_g_hash_table_remove (threads_starting_up, thread);
727 mono_threads_unlock ();
729 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
733 internal->handle=thread_handle;
735 internal->apartment_state=ThreadApartmentState_Unknown;
736 internal->thread_pinning_ref = internal;
737 internal->managed_id = get_next_managed_thread_id ();
738 MONO_GC_REGISTER_ROOT (internal->thread_pinning_ref);
740 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
741 InitializeCriticalSection (internal->synch_cs);
743 internal->threadpool_thread = threadpool_thread;
744 if (threadpool_thread)
745 mono_thread_set_state (internal, ThreadState_Background);
747 if (handle_store (thread))
748 ResumeThread (thread_handle);
754 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
756 mono_thread_create_internal (domain, func, arg, FALSE, 0);
760 * mono_thread_get_stack_bounds:
762 * Return the address and size of the current threads stack. Return NULL as the
763 * stack address if the stack address cannot be determined.
766 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
768 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
769 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
770 *stsize = pthread_get_stacksize_np (pthread_self ());
772 /* staddr points to the start of the stack, not the end */
774 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
776 /* FIXME: simplify the mess below */
777 #elif !defined(HOST_WIN32)
779 guint8 *current = (guint8*)&attr;
781 pthread_attr_init (&attr);
782 # ifdef HAVE_PTHREAD_GETATTR_NP
783 pthread_getattr_np (pthread_self(), &attr);
785 # ifdef HAVE_PTHREAD_ATTR_GET_NP
786 pthread_attr_get_np (pthread_self(), &attr);
789 pthread_attr_getstacksize (&attr, &stsize);
790 # elif defined(__OpenBSD__)
794 rslt = pthread_stackseg_np(pthread_self(), &ss);
795 g_assert (rslt == 0);
797 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
798 *stsize = ss.ss_size;
807 # if !defined(__OpenBSD__)
808 pthread_attr_getstack (&attr, (void**)staddr, stsize);
811 g_assert ((current > *staddr) && (current < *staddr + *stsize));
814 pthread_attr_destroy (&attr);
817 *stsize = (size_t)-1;
820 /* When running under emacs, sometimes staddr is not aligned to a page size */
821 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
825 mono_thread_attach (MonoDomain *domain)
827 MonoInternalThread *thread;
828 MonoThread *current_thread;
829 HANDLE thread_handle;
832 if ((thread = mono_thread_internal_current ())) {
833 if (domain != mono_domain_get ())
834 mono_domain_set (domain, TRUE);
835 /* Already attached */
836 return mono_thread_current ();
839 if (!mono_gc_register_thread (&domain)) {
840 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 ());
843 thread = create_internal_thread_object ();
845 thread_handle = GetCurrentThread ();
846 g_assert (thread_handle);
848 tid=GetCurrentThreadId ();
851 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
852 * refer to the thread from other threads for things like aborting.
854 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
855 THREAD_ALL_ACCESS, TRUE, 0);
857 thread->handle=thread_handle;
859 #ifdef PLATFORM_ANDROID
860 thread->android_tid = (gpointer) gettid ();
862 thread->apartment_state=ThreadApartmentState_Unknown;
863 thread->thread_pinning_ref = thread;
864 thread->managed_id = get_next_managed_thread_id ();
865 MONO_GC_REGISTER_ROOT (thread->thread_pinning_ref);
867 thread->stack_ptr = &tid;
869 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
870 InitializeCriticalSection (thread->synch_cs);
872 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
874 current_thread = new_thread_with_internal (domain, thread);
876 if (!handle_store (current_thread)) {
877 /* Mono is shutting down, so just wait for the end */
882 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
884 SET_CURRENT_OBJECT (thread);
885 mono_domain_set (domain, TRUE);
887 mono_monitor_init_tls ();
889 thread_adjust_static_data (thread);
891 init_root_domain_thread (thread, current_thread);
892 if (domain != mono_get_root_domain ())
893 set_current_thread_for_domain (domain, thread, current_thread);
896 if (mono_thread_attach_cb) {
900 mono_thread_get_stack_bounds (&staddr, &stsize);
903 mono_thread_attach_cb (tid, &tid);
905 mono_thread_attach_cb (tid, staddr + stsize);
908 // FIXME: Need a separate callback
909 mono_profiler_thread_start (tid);
911 return current_thread;
915 mono_thread_detach (MonoThread *thread)
917 g_return_if_fail (thread != NULL);
919 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
921 thread_cleanup (thread->internal_thread);
923 SET_CURRENT_OBJECT (NULL);
924 mono_domain_unset ();
926 /* Don't need to CloseHandle this thread, even though we took a
927 * reference in mono_thread_attach (), because the GC will do it
928 * when the Thread object is finalised.
935 MonoInternalThread *thread = mono_thread_internal_current ();
937 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
939 thread_cleanup (thread);
940 SET_CURRENT_OBJECT (NULL);
941 mono_domain_unset ();
943 /* we could add a callback here for embedders to use. */
944 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
945 exit (mono_environment_exitcode_get ());
950 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
952 MonoInternalThread *internal = create_internal_thread_object ();
954 internal->state = ThreadState_Unstarted;
955 internal->apartment_state = ThreadApartmentState_Unknown;
956 internal->managed_id = get_next_managed_thread_id ();
958 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
961 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
964 guint32 (*start_func)(void *);
965 struct StartInfo *start_info;
968 MonoInternalThread *internal;
970 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
972 if (!this->internal_thread)
973 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
974 internal = this->internal_thread;
976 ensure_synch_cs_set (internal);
978 EnterCriticalSection (internal->synch_cs);
980 if ((internal->state & ThreadState_Unstarted) == 0) {
981 LeaveCriticalSection (internal->synch_cs);
982 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
986 if ((internal->state & ThreadState_Aborted) != 0) {
987 LeaveCriticalSection (internal->synch_cs);
992 /* This is freed in start_wrapper */
993 start_info = g_new0 (struct StartInfo, 1);
994 start_info->func = start_func;
995 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
996 start_info->delegate = start;
997 start_info->obj = this;
998 g_assert (this->obj.vtable->domain == mono_domain_get ());
1000 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1001 if (internal->start_notify==NULL) {
1002 LeaveCriticalSection (internal->synch_cs);
1003 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1004 g_free (start_info);
1008 mono_threads_lock ();
1009 register_thread_start_argument (this, start_info);
1010 if (threads_starting_up == NULL) {
1011 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1012 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1014 mono_g_hash_table_insert (threads_starting_up, this, this);
1015 mono_threads_unlock ();
1017 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1018 CREATE_SUSPENDED, &tid);
1020 LeaveCriticalSection (internal->synch_cs);
1021 mono_threads_lock ();
1022 mono_g_hash_table_remove (threads_starting_up, this);
1023 mono_threads_unlock ();
1024 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1028 internal->handle=thread;
1030 internal->thread_pinning_ref = internal;
1031 MONO_GC_REGISTER_ROOT (internal->thread_pinning_ref);
1034 /* Don't call handle_store() here, delay it to Start.
1035 * We can't join a thread (trying to will just block
1036 * forever) until it actually starts running, so don't
1037 * store the handle till then.
1040 mono_thread_start (this);
1042 internal->state &= ~ThreadState_Unstarted;
1044 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1046 LeaveCriticalSection (internal->synch_cs);
1051 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1053 MONO_ARCH_SAVE_REGS;
1055 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1058 CloseHandle (thread);
1060 if (this->synch_cs) {
1061 CRITICAL_SECTION *synch_cs = this->synch_cs;
1062 this->synch_cs = NULL;
1063 DeleteCriticalSection (synch_cs);
1068 void *name = this->name;
1074 static void mono_thread_start (MonoThread *thread)
1076 MonoInternalThread *internal = thread->internal_thread;
1078 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1080 /* Only store the handle when the thread is about to be
1081 * launched, to avoid the main thread deadlocking while trying
1082 * to clean up a thread that will never be signalled.
1084 if (!handle_store (thread))
1087 ResumeThread (internal->handle);
1089 if(internal->start_notify!=NULL) {
1090 /* Wait for the thread to set up its TLS data etc, so
1091 * theres no potential race condition if someone tries
1092 * to look up the data believing the thread has
1096 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1098 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1099 CloseHandle (internal->start_notify);
1100 internal->start_notify = NULL;
1103 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1106 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1109 MonoInternalThread *thread = mono_thread_internal_current ();
1111 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1113 mono_thread_current_check_pending_interrupt ();
1116 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1118 res = SleepEx(ms,TRUE);
1120 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1122 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1123 MonoException* exc = mono_thread_execute_interruption (thread);
1125 mono_raise_exception (exc);
1137 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1142 ves_icall_System_Threading_Thread_GetDomainID (void)
1144 MONO_ARCH_SAVE_REGS;
1146 return mono_domain_get()->domain_id;
1150 ves_icall_System_Threading_Thread_Yield (void)
1153 return SwitchToThread ();
1155 return sched_yield () == 0;
1160 * mono_thread_get_name:
1162 * Return the name of the thread. NAME_LEN is set to the length of the name.
1163 * Return NULL if the thread has no name. The returned memory is owned by the
1167 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1171 ensure_synch_cs_set (this_obj);
1173 EnterCriticalSection (this_obj->synch_cs);
1175 if (!this_obj->name) {
1179 *name_len = this_obj->name_len;
1180 res = g_new (gunichar2, this_obj->name_len);
1181 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1184 LeaveCriticalSection (this_obj->synch_cs);
1190 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1194 ensure_synch_cs_set (this_obj);
1196 EnterCriticalSection (this_obj->synch_cs);
1198 if (!this_obj->name)
1201 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1203 LeaveCriticalSection (this_obj->synch_cs);
1209 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1211 ensure_synch_cs_set (this_obj);
1213 EnterCriticalSection (this_obj->synch_cs);
1215 if (this_obj->name) {
1216 LeaveCriticalSection (this_obj->synch_cs);
1218 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1222 this_obj->name = g_new (gunichar2, mono_string_length (name));
1223 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1224 this_obj->name_len = mono_string_length (name);
1227 this_obj->name = NULL;
1229 LeaveCriticalSection (this_obj->synch_cs);
1230 if (this_obj->name) {
1231 char *tname = mono_string_to_utf8 (name);
1232 mono_profiler_thread_name (this_obj->tid, tname);
1237 /* If the array is already in the requested domain, we just return it,
1238 otherwise we return a copy in that domain. */
1240 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1247 if (mono_object_domain (arr) == domain)
1250 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1251 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1256 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1258 return byte_array_to_domain (arr, mono_get_root_domain ());
1262 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1264 return byte_array_to_domain (arr, mono_domain_get ());
1268 mono_thread_current (void)
1270 MonoDomain *domain = mono_domain_get ();
1271 MonoInternalThread *internal = mono_thread_internal_current ();
1272 MonoThread **current_thread_ptr;
1274 g_assert (internal);
1275 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1277 if (!*current_thread_ptr) {
1278 g_assert (domain != mono_get_root_domain ());
1279 *current_thread_ptr = new_thread_with_internal (domain, internal);
1281 return *current_thread_ptr;
1285 mono_thread_internal_current (void)
1287 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1288 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1292 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1293 int ms, HANDLE thread)
1295 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1298 mono_thread_current_check_pending_interrupt ();
1300 ensure_synch_cs_set (this);
1302 EnterCriticalSection (this->synch_cs);
1304 if ((this->state & ThreadState_Unstarted) != 0) {
1305 LeaveCriticalSection (this->synch_cs);
1307 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1311 LeaveCriticalSection (this->synch_cs);
1316 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1318 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1320 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1322 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1324 if(ret==WAIT_OBJECT_0) {
1325 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1330 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1335 /* FIXME: exitContext isnt documented */
1336 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1342 MonoObject *waitHandle;
1343 MonoInternalThread *thread = mono_thread_internal_current ();
1345 /* Do this WaitSleepJoin check before creating objects */
1346 mono_thread_current_check_pending_interrupt ();
1348 numhandles = mono_array_length(mono_handles);
1349 handles = g_new0(HANDLE, numhandles);
1351 for(i = 0; i < numhandles; i++) {
1352 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1353 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1360 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1362 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1364 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1368 if(ret==WAIT_FAILED) {
1369 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1371 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1372 /* Do we want to try again if we get
1373 * WAIT_IO_COMPLETION? The documentation for
1374 * WaitHandle doesn't give any clues. (We'd have to
1375 * fiddle with the timeout if we retry.)
1377 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1384 /* FIXME: exitContext isnt documented */
1385 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1387 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1391 MonoObject *waitHandle;
1392 MonoInternalThread *thread = mono_thread_internal_current ();
1395 /* Do this WaitSleepJoin check before creating objects */
1396 mono_thread_current_check_pending_interrupt ();
1398 numhandles = mono_array_length(mono_handles);
1399 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1402 for(i = 0; i < numhandles; i++) {
1403 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1404 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1411 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1413 start = (ms == -1) ? 0 : mono_msec_ticks ();
1415 ret = WaitForMultipleObjectsEx (numhandles, handles, FALSE, ms, TRUE);
1416 if (ret != WAIT_IO_COMPLETION)
1421 diff = mono_msec_ticks () - start;
1426 } while (ms == -1 || ms > 0);
1428 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1430 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1433 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1435 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1436 return ret - WAIT_OBJECT_0;
1438 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1439 return ret - WAIT_ABANDONED_0;
1446 /* FIXME: exitContext isnt documented */
1447 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1450 MonoInternalThread *thread = mono_thread_internal_current ();
1452 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1458 mono_thread_current_check_pending_interrupt ();
1460 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1462 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1464 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1466 if(ret==WAIT_FAILED) {
1467 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1469 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1470 /* Do we want to try again if we get
1471 * WAIT_IO_COMPLETION? The documentation for
1472 * WaitHandle doesn't give any clues. (We'd have to
1473 * fiddle with the timeout if we retry.)
1475 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1483 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1486 MonoInternalThread *thread = mono_thread_internal_current ();
1488 MONO_ARCH_SAVE_REGS;
1493 mono_thread_current_check_pending_interrupt ();
1495 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1497 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1499 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1501 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1504 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1508 MONO_ARCH_SAVE_REGS;
1513 mutex = CreateMutex (NULL, owned, NULL);
1515 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1517 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1525 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1526 MONO_ARCH_SAVE_REGS;
1528 return(ReleaseMutex (handle));
1531 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1537 MONO_ARCH_SAVE_REGS;
1539 *error = ERROR_SUCCESS;
1541 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1543 *error = GetLastError ();
1550 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1554 MONO_ARCH_SAVE_REGS;
1559 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1561 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1562 mono_string_chars (name));
1564 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1572 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1576 MONO_ARCH_SAVE_REGS;
1578 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1583 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1587 MONO_ARCH_SAVE_REGS;
1589 *error = ERROR_SUCCESS;
1591 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1593 *error = GetLastError ();
1599 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1603 MONO_ARCH_SAVE_REGS;
1608 event = CreateEvent (NULL, manual, initial, NULL);
1610 event = CreateEvent (NULL, manual, initial,
1611 mono_string_chars (name));
1613 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1621 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1622 MONO_ARCH_SAVE_REGS;
1624 return (SetEvent(handle));
1627 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1628 MONO_ARCH_SAVE_REGS;
1630 return (ResetEvent(handle));
1634 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1635 MONO_ARCH_SAVE_REGS;
1637 CloseHandle (handle);
1640 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1646 MONO_ARCH_SAVE_REGS;
1648 *error = ERROR_SUCCESS;
1650 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1652 *error = GetLastError ();
1658 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1660 MONO_ARCH_SAVE_REGS;
1662 return InterlockedIncrement (location);
1665 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1669 MONO_ARCH_SAVE_REGS;
1671 mono_interlocked_lock ();
1675 mono_interlocked_unlock ();
1681 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1683 MONO_ARCH_SAVE_REGS;
1685 return InterlockedDecrement(location);
1688 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1692 MONO_ARCH_SAVE_REGS;
1694 mono_interlocked_lock ();
1698 mono_interlocked_unlock ();
1703 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1705 MONO_ARCH_SAVE_REGS;
1707 return InterlockedExchange(location, value);
1710 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1713 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1714 mono_gc_wbarrier_generic_nostore (location);
1718 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1720 return InterlockedExchangePointer(location, value);
1723 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1725 IntFloatUnion val, ret;
1727 MONO_ARCH_SAVE_REGS;
1730 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1736 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1738 #if SIZEOF_VOID_P == 8
1739 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1744 * According to MSDN, this function is only atomic with regards to the
1745 * other Interlocked functions on 32 bit platforms.
1747 mono_interlocked_lock ();
1750 mono_interlocked_unlock ();
1757 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1759 #if SIZEOF_VOID_P == 8
1760 LongDoubleUnion val, ret;
1763 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1770 * According to MSDN, this function is only atomic with regards to the
1771 * other Interlocked functions on 32 bit platforms.
1773 mono_interlocked_lock ();
1776 mono_interlocked_unlock ();
1782 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1784 MONO_ARCH_SAVE_REGS;
1786 return InterlockedCompareExchange(location, value, comparand);
1789 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1792 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1793 mono_gc_wbarrier_generic_nostore (location);
1797 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1799 return InterlockedCompareExchangePointer(location, value, comparand);
1802 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1804 IntFloatUnion val, ret, cmp;
1806 MONO_ARCH_SAVE_REGS;
1809 cmp.fval = comparand;
1810 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1816 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1818 #if SIZEOF_VOID_P == 8
1819 LongDoubleUnion val, comp, ret;
1822 comp.fval = comparand;
1823 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1829 mono_interlocked_lock ();
1831 if (old == comparand)
1833 mono_interlocked_unlock ();
1840 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1842 #if SIZEOF_VOID_P == 8
1843 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1847 mono_interlocked_lock ();
1849 if (old == comparand)
1851 mono_interlocked_unlock ();
1858 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1861 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1862 mono_gc_wbarrier_generic_nostore (location);
1867 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1870 res = InterlockedExchangePointer ((gpointer *)location, value);
1871 mono_gc_wbarrier_generic_nostore (location);
1876 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1878 #if SIZEOF_VOID_P == 8
1879 /* Should be implemented as a JIT intrinsic */
1880 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1885 mono_interlocked_lock ();
1887 *location = orig + value;
1888 mono_interlocked_unlock ();
1890 return orig + value;
1895 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1897 #if SIZEOF_VOID_P == 8
1898 /* Should be implemented as a JIT intrinsic */
1899 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1904 mono_interlocked_lock ();
1906 *location = orig + value;
1907 mono_interlocked_unlock ();
1909 return orig + value;
1914 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1916 #if SIZEOF_VOID_P == 8
1917 /* 64 bit reads are already atomic */
1922 mono_interlocked_lock ();
1924 mono_interlocked_unlock ();
1931 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1933 mono_threads_lock ();
1934 mono_threads_unlock ();
1938 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1940 mono_thread_clr_state (this, state);
1942 if (state & ThreadState_Background) {
1943 /* If the thread changes the background mode, the main thread has to
1944 * be notified, since it has to rebuild the list of threads to
1947 SetEvent (background_change_event);
1952 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1954 mono_thread_set_state (this, state);
1956 if (state & ThreadState_Background) {
1957 /* If the thread changes the background mode, the main thread has to
1958 * be notified, since it has to rebuild the list of threads to
1961 SetEvent (background_change_event);
1966 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1970 ensure_synch_cs_set (this);
1972 EnterCriticalSection (this->synch_cs);
1974 state = this->state;
1976 LeaveCriticalSection (this->synch_cs);
1981 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1983 MonoInternalThread *current;
1986 ensure_synch_cs_set (this);
1988 current = mono_thread_internal_current ();
1990 EnterCriticalSection (this->synch_cs);
1992 this->thread_interrupt_requested = TRUE;
1993 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1995 LeaveCriticalSection (this->synch_cs);
1998 abort_thread_internal (this, TRUE, FALSE);
2002 void mono_thread_current_check_pending_interrupt ()
2004 MonoInternalThread *thread = mono_thread_internal_current ();
2005 gboolean throw = FALSE;
2007 mono_debugger_check_interruption ();
2009 ensure_synch_cs_set (thread);
2011 EnterCriticalSection (thread->synch_cs);
2013 if (thread->thread_interrupt_requested) {
2015 thread->thread_interrupt_requested = FALSE;
2018 LeaveCriticalSection (thread->synch_cs);
2021 mono_raise_exception (mono_get_exception_thread_interrupted ());
2026 mono_thread_get_abort_signal (void)
2038 static int abort_signum = -1;
2040 if (abort_signum != -1)
2041 return abort_signum;
2042 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2043 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2044 struct sigaction sinfo;
2045 sigaction (i, NULL, &sinfo);
2046 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2051 /* fallback to the old way */
2054 #endif /* HOST_WIN32 */
2058 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2060 MonoException* exc = mono_thread_request_interruption (FALSE);
2061 if (exc) mono_raise_exception (exc);
2063 #endif /* HOST_WIN32 */
2066 * signal_thread_state_change
2068 * Tells the thread that his state has changed and it has to enter the new
2069 * state as soon as possible.
2071 static void signal_thread_state_change (MonoInternalThread *thread)
2073 if (thread == mono_thread_internal_current ()) {
2074 /* Do it synchronously */
2075 MonoException *exc = mono_thread_request_interruption (FALSE);
2077 mono_raise_exception (exc);
2081 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2083 /* fixme: store the state somewhere */
2084 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2087 * This will cause waits to be broken.
2088 * It will also prevent the thread from entering a wait, so if the thread returns
2089 * from the wait before it receives the abort signal, it will just spin in the wait
2090 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2093 wapi_interrupt_thread (thread->handle);
2094 #endif /* HOST_WIN32 */
2098 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2100 ensure_synch_cs_set (thread);
2102 EnterCriticalSection (thread->synch_cs);
2104 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2105 (thread->state & ThreadState_StopRequested) != 0 ||
2106 (thread->state & ThreadState_Stopped) != 0)
2108 LeaveCriticalSection (thread->synch_cs);
2112 if ((thread->state & ThreadState_Unstarted) != 0) {
2113 thread->state |= ThreadState_Aborted;
2114 LeaveCriticalSection (thread->synch_cs);
2118 thread->state |= ThreadState_AbortRequested;
2119 if (thread->abort_state_handle)
2120 mono_gchandle_free (thread->abort_state_handle);
2122 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2123 g_assert (thread->abort_state_handle);
2125 thread->abort_state_handle = 0;
2127 thread->abort_exc = NULL;
2130 * abort_exc is set in mono_thread_execute_interruption(),
2131 * triggered by the call to signal_thread_state_change(),
2132 * below. There's a point between where we have
2133 * abort_state_handle set, but abort_exc NULL, but that's not
2137 LeaveCriticalSection (thread->synch_cs);
2139 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2141 /* During shutdown, we can't wait for other threads */
2143 /* Make sure the thread is awake */
2144 mono_thread_resume (thread);
2146 abort_thread_internal (thread, TRUE, TRUE);
2150 ves_icall_System_Threading_Thread_ResetAbort (void)
2152 MonoInternalThread *thread = mono_thread_internal_current ();
2153 gboolean was_aborting;
2155 ensure_synch_cs_set (thread);
2157 EnterCriticalSection (thread->synch_cs);
2158 was_aborting = thread->state & ThreadState_AbortRequested;
2159 thread->state &= ~ThreadState_AbortRequested;
2160 LeaveCriticalSection (thread->synch_cs);
2162 if (!was_aborting) {
2163 const char *msg = "Unable to reset abort because no abort was requested";
2164 mono_raise_exception (mono_get_exception_thread_state (msg));
2166 thread->abort_exc = NULL;
2167 if (thread->abort_state_handle) {
2168 mono_gchandle_free (thread->abort_state_handle);
2169 /* This is actually not necessary - the handle
2170 only counts if the exception is set */
2171 thread->abort_state_handle = 0;
2176 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2178 ensure_synch_cs_set (thread);
2180 EnterCriticalSection (thread->synch_cs);
2182 thread->state &= ~ThreadState_AbortRequested;
2184 if (thread->abort_exc) {
2185 thread->abort_exc = NULL;
2186 if (thread->abort_state_handle) {
2187 mono_gchandle_free (thread->abort_state_handle);
2188 /* This is actually not necessary - the handle
2189 only counts if the exception is set */
2190 thread->abort_state_handle = 0;
2194 LeaveCriticalSection (thread->synch_cs);
2198 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2200 MonoInternalThread *thread = this->internal_thread;
2201 MonoObject *state, *deserialized = NULL, *exc;
2204 if (!thread->abort_state_handle)
2207 state = mono_gchandle_get_target (thread->abort_state_handle);
2210 domain = mono_domain_get ();
2211 if (mono_object_domain (state) == domain)
2214 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2216 if (!deserialized) {
2217 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2219 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2220 mono_raise_exception (invalid_op_exc);
2223 return deserialized;
2227 mono_thread_suspend (MonoInternalThread *thread)
2229 ensure_synch_cs_set (thread);
2231 EnterCriticalSection (thread->synch_cs);
2233 if ((thread->state & ThreadState_Unstarted) != 0 ||
2234 (thread->state & ThreadState_Aborted) != 0 ||
2235 (thread->state & ThreadState_Stopped) != 0)
2237 LeaveCriticalSection (thread->synch_cs);
2241 if ((thread->state & ThreadState_Suspended) != 0 ||
2242 (thread->state & ThreadState_SuspendRequested) != 0 ||
2243 (thread->state & ThreadState_StopRequested) != 0)
2245 LeaveCriticalSection (thread->synch_cs);
2249 thread->state |= ThreadState_SuspendRequested;
2251 LeaveCriticalSection (thread->synch_cs);
2253 suspend_thread_internal (thread, FALSE);
2258 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2260 if (!mono_thread_suspend (thread))
2261 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2265 mono_thread_resume (MonoInternalThread *thread)
2267 ensure_synch_cs_set (thread);
2269 EnterCriticalSection (thread->synch_cs);
2271 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2272 thread->state &= ~ThreadState_SuspendRequested;
2273 LeaveCriticalSection (thread->synch_cs);
2277 if ((thread->state & ThreadState_Suspended) == 0 ||
2278 (thread->state & ThreadState_Unstarted) != 0 ||
2279 (thread->state & ThreadState_Aborted) != 0 ||
2280 (thread->state & ThreadState_Stopped) != 0)
2282 LeaveCriticalSection (thread->synch_cs);
2286 return resume_thread_internal (thread);
2290 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2292 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2293 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2297 mono_threads_is_critical_method (MonoMethod *method)
2299 switch (method->wrapper_type) {
2300 case MONO_WRAPPER_RUNTIME_INVOKE:
2301 case MONO_WRAPPER_XDOMAIN_INVOKE:
2302 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2309 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2314 if (mono_threads_is_critical_method (m)) {
2315 *((gboolean*)data) = TRUE;
2322 is_running_protected_wrapper (void)
2324 gboolean found = FALSE;
2325 mono_stack_walk (find_wrapper, &found);
2329 void mono_thread_internal_stop (MonoInternalThread *thread)
2331 ensure_synch_cs_set (thread);
2333 EnterCriticalSection (thread->synch_cs);
2335 if ((thread->state & ThreadState_StopRequested) != 0 ||
2336 (thread->state & ThreadState_Stopped) != 0)
2338 LeaveCriticalSection (thread->synch_cs);
2342 /* Make sure the thread is awake */
2343 mono_thread_resume (thread);
2345 thread->state |= ThreadState_StopRequested;
2346 thread->state &= ~ThreadState_AbortRequested;
2348 LeaveCriticalSection (thread->synch_cs);
2350 abort_thread_internal (thread, TRUE, TRUE);
2353 void mono_thread_stop (MonoThread *thread)
2355 mono_thread_internal_stop (thread->internal_thread);
2359 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2361 return *((volatile gint8 *) (ptr));
2365 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2367 return *((volatile gint16 *) (ptr));
2371 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2373 return *((volatile gint32 *) (ptr));
2377 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2379 return *((volatile gint64 *) (ptr));
2383 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2385 return (void *) *((volatile void **) ptr);
2389 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2391 return *((volatile double *) (ptr));
2395 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2397 return *((volatile float *) (ptr));
2401 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2403 *((volatile gint8 *) ptr) = value;
2407 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2409 *((volatile gint16 *) ptr) = value;
2413 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2415 *((volatile gint32 *) ptr) = value;
2419 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2421 *((volatile gint64 *) ptr) = value;
2425 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2427 *((volatile void **) ptr) = value;
2431 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2433 mono_gc_wbarrier_generic_store (ptr, value);
2437 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2439 *((volatile double *) ptr) = value;
2443 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2445 *((volatile float *) ptr) = value;
2448 void mono_thread_init (MonoThreadStartCB start_cb,
2449 MonoThreadAttachCB attach_cb)
2451 InitializeCriticalSection(&threads_mutex);
2452 InitializeCriticalSection(&interlocked_mutex);
2453 InitializeCriticalSection(&contexts_mutex);
2455 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2456 g_assert(background_change_event != NULL);
2458 mono_init_static_data_info (&thread_static_info);
2459 mono_init_static_data_info (&context_static_info);
2461 MONO_FAST_TLS_INIT (tls_current_object);
2462 mono_native_tls_alloc (¤t_object_key, NULL);
2463 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2465 mono_thread_start_cb = start_cb;
2466 mono_thread_attach_cb = attach_cb;
2468 /* Get a pseudo handle to the current process. This is just a
2469 * kludge so that wapi can build a process handle if needed.
2470 * As a pseudo handle is returned, we don't need to clean
2473 GetCurrentProcess ();
2476 void mono_thread_cleanup (void)
2478 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2479 /* The main thread must abandon any held mutexes (particularly
2480 * important for named mutexes as they are shared across
2481 * processes, see bug 74680.) This will happen when the
2482 * thread exits, but if it's not running in a subthread it
2483 * won't exit in time.
2485 /* Using non-w32 API is a nasty kludge, but I couldn't find
2486 * anything in the documentation that would let me do this
2487 * here yet still be safe to call on windows.
2489 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2493 /* This stuff needs more testing, it seems one of these
2494 * critical sections can be locked when mono_thread_cleanup is
2497 DeleteCriticalSection (&threads_mutex);
2498 DeleteCriticalSection (&interlocked_mutex);
2499 DeleteCriticalSection (&contexts_mutex);
2500 DeleteCriticalSection (&delayed_free_table_mutex);
2501 DeleteCriticalSection (&small_id_mutex);
2502 CloseHandle (background_change_event);
2505 mono_native_tls_free (current_object_key);
2509 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2511 mono_thread_cleanup_fn = func;
2515 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2517 thread->internal_thread->manage_callback = func;
2520 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2522 mono_thread_notify_pending_exc_fn = func;
2526 static void print_tids (gpointer key, gpointer value, gpointer user)
2528 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2529 * sizeof(uint) and a cast to uint would overflow
2531 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2532 * print this as a pointer.
2534 g_message ("Waiting for: %p", key);
2539 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2540 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2544 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2548 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2550 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2552 if(ret==WAIT_FAILED) {
2553 /* See the comment in build_wait_tids() */
2554 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2558 for(i=0; i<wait->num; i++)
2559 CloseHandle (wait->handles[i]);
2561 if (ret == WAIT_TIMEOUT)
2564 for(i=0; i<wait->num; i++) {
2565 gsize tid = wait->threads[i]->tid;
2567 mono_threads_lock ();
2568 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2569 /* This thread must have been killed, because
2570 * it hasn't cleaned itself up. (It's just
2571 * possible that the thread exited before the
2572 * parent thread had a chance to store the
2573 * handle, and now there is another pointer to
2574 * the already-exited thread stored. In this
2575 * case, we'll just get two
2576 * mono_profiler_thread_end() calls for the
2580 mono_threads_unlock ();
2581 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2582 thread_cleanup (wait->threads[i]);
2584 mono_threads_unlock ();
2589 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2591 guint32 i, ret, count;
2593 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2595 /* Add the thread state change event, so it wakes up if a thread changes
2596 * to background mode.
2599 if (count < MAXIMUM_WAIT_OBJECTS) {
2600 wait->handles [count] = background_change_event;
2604 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2606 if(ret==WAIT_FAILED) {
2607 /* See the comment in build_wait_tids() */
2608 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2612 for(i=0; i<wait->num; i++)
2613 CloseHandle (wait->handles[i]);
2615 if (ret == WAIT_TIMEOUT)
2618 if (ret < wait->num) {
2619 gsize tid = wait->threads[ret]->tid;
2620 mono_threads_lock ();
2621 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2622 /* See comment in wait_for_tids about thread cleanup */
2623 mono_threads_unlock ();
2624 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2625 thread_cleanup (wait->threads [ret]);
2627 mono_threads_unlock ();
2631 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2633 struct wait_data *wait=(struct wait_data *)user;
2635 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2637 MonoInternalThread *thread=(MonoInternalThread *)value;
2639 /* Ignore background threads, we abort them later */
2640 /* Do not lock here since it is not needed and the caller holds threads_lock */
2641 if (thread->state & ThreadState_Background) {
2642 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2643 return; /* just leave, ignore */
2646 if (mono_gc_is_finalizer_internal_thread (thread)) {
2647 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2651 if (thread == mono_thread_internal_current ()) {
2652 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2656 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2657 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2661 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2662 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2666 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2667 if (handle == NULL) {
2668 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2672 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2673 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2674 wait->handles[wait->num]=handle;
2675 wait->threads[wait->num]=thread;
2678 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2680 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2685 /* Just ignore the rest, we can't do anything with
2692 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2694 struct wait_data *wait=(struct wait_data *)user;
2695 gsize self = GetCurrentThreadId ();
2696 MonoInternalThread *thread = value;
2699 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2702 /* The finalizer thread is not a background thread */
2703 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2704 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2706 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2710 /* printf ("A: %d\n", wait->num); */
2711 wait->handles[wait->num]=thread->handle;
2712 wait->threads[wait->num]=thread;
2715 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2716 mono_thread_internal_stop (thread);
2720 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2724 * mono_threads_set_shutting_down:
2726 * Is called by a thread that wants to shut down Mono. If the runtime is already
2727 * shutting down, the calling thread is suspended/stopped, and this function never
2731 mono_threads_set_shutting_down (void)
2733 MonoInternalThread *current_thread = mono_thread_internal_current ();
2735 mono_threads_lock ();
2737 if (shutting_down) {
2738 mono_threads_unlock ();
2740 /* Make sure we're properly suspended/stopped */
2742 EnterCriticalSection (current_thread->synch_cs);
2744 if ((current_thread->state & ThreadState_SuspendRequested) ||
2745 (current_thread->state & ThreadState_AbortRequested) ||
2746 (current_thread->state & ThreadState_StopRequested)) {
2747 LeaveCriticalSection (current_thread->synch_cs);
2748 mono_thread_execute_interruption (current_thread);
2750 current_thread->state |= ThreadState_Stopped;
2751 LeaveCriticalSection (current_thread->synch_cs);
2754 /*since we're killing the thread, unset the current domain.*/
2755 mono_domain_unset ();
2757 /* Wake up other threads potentially waiting for us */
2760 shutting_down = TRUE;
2762 /* Not really a background state change, but this will
2763 * interrupt the main thread if it is waiting for all
2764 * the other threads.
2766 SetEvent (background_change_event);
2768 mono_threads_unlock ();
2773 * mono_threads_is_shutting_down:
2775 * Returns whether a thread has commenced shutdown of Mono. Note that
2776 * if the function returns FALSE the caller must not assume that
2777 * shutdown is not in progress, because the situation might have
2778 * changed since the function returned. For that reason this function
2779 * is of very limited utility.
2782 mono_threads_is_shutting_down (void)
2784 return shutting_down;
2787 void mono_thread_manage (void)
2789 struct wait_data wait_data;
2790 struct wait_data *wait = &wait_data;
2792 memset (wait, 0, sizeof (struct wait_data));
2793 /* join each thread that's still running */
2794 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2796 mono_threads_lock ();
2798 THREAD_DEBUG (g_message("%s: No threads", __func__));
2799 mono_threads_unlock ();
2802 mono_threads_unlock ();
2805 mono_threads_lock ();
2806 if (shutting_down) {
2807 /* somebody else is shutting down */
2808 mono_threads_unlock ();
2811 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2812 mono_g_hash_table_foreach (threads, print_tids, NULL));
2814 ResetEvent (background_change_event);
2816 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2817 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2818 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2819 mono_threads_unlock ();
2821 /* Something to wait for */
2822 wait_for_tids_or_state_change (wait, INFINITE);
2824 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2825 } while(wait->num>0);
2827 mono_threads_set_shutting_down ();
2829 /* No new threads will be created after this point */
2831 mono_runtime_set_shutting_down ();
2833 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2834 mono_thread_pool_cleanup ();
2837 * Remove everything but the finalizer thread and self.
2838 * Also abort all the background threads
2841 mono_threads_lock ();
2844 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2845 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2846 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2848 mono_threads_unlock ();
2850 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2852 /* Something to wait for */
2853 wait_for_tids (wait, INFINITE);
2855 } while (wait->num > 0);
2858 * give the subthreads a chance to really quit (this is mainly needed
2859 * to get correct user and system times from getrusage/wait/time(1)).
2860 * This could be removed if we avoid pthread_detach() and use pthread_join().
2867 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2869 MonoInternalThread *thread=(MonoInternalThread *)value;
2871 if(thread->tid != (gsize)user) {
2872 /*TerminateThread (thread->handle, -1);*/
2876 void mono_thread_abort_all_other_threads (void)
2878 gsize self = GetCurrentThreadId ();
2880 mono_threads_lock ();
2881 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2882 mono_g_hash_table_size (threads));
2883 mono_g_hash_table_foreach (threads, print_tids, NULL));
2885 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2887 mono_threads_unlock ();
2891 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2893 MonoInternalThread *thread = (MonoInternalThread*)value;
2894 struct wait_data *wait = (struct wait_data*)user_data;
2898 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2900 * This needs no locking.
2902 if ((thread->state & ThreadState_Suspended) != 0 ||
2903 (thread->state & ThreadState_Stopped) != 0)
2906 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2907 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2911 wait->handles [wait->num] = handle;
2912 wait->threads [wait->num] = thread;
2918 * mono_thread_suspend_all_other_threads:
2920 * Suspend all managed threads except the finalizer thread and this thread. It is
2921 * not possible to resume them later.
2923 void mono_thread_suspend_all_other_threads (void)
2925 struct wait_data wait_data;
2926 struct wait_data *wait = &wait_data;
2928 gsize self = GetCurrentThreadId ();
2930 guint32 eventidx = 0;
2931 gboolean starting, finished;
2933 memset (wait, 0, sizeof (struct wait_data));
2935 * The other threads could be in an arbitrary state at this point, i.e.
2936 * they could be starting up, shutting down etc. This means that there could be
2937 * threads which are not even in the threads hash table yet.
2941 * First we set a barrier which will be checked by all threads before they
2942 * are added to the threads hash table, and they will exit if the flag is set.
2943 * This ensures that no threads could be added to the hash later.
2944 * We will use shutting_down as the barrier for now.
2946 g_assert (shutting_down);
2949 * We make multiple calls to WaitForMultipleObjects since:
2950 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
2951 * - some threads could exit without becoming suspended
2956 * Make a copy of the hashtable since we can't do anything with
2957 * threads while threads_mutex is held.
2960 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2961 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2962 mono_threads_lock ();
2963 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
2964 mono_threads_unlock ();
2966 events = g_new0 (gpointer, wait->num);
2968 /* Get the suspended events that we'll be waiting for */
2969 for (i = 0; i < wait->num; ++i) {
2970 MonoInternalThread *thread = wait->threads [i];
2971 gboolean signal_suspend = FALSE;
2973 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2974 //CloseHandle (wait->handles [i]);
2975 wait->threads [i] = NULL; /* ignore this thread in next loop */
2979 ensure_synch_cs_set (thread);
2981 EnterCriticalSection (thread->synch_cs);
2983 if (thread->suspended_event == NULL) {
2984 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2985 if (thread->suspended_event == NULL) {
2986 /* Forget this one and go on to the next */
2987 LeaveCriticalSection (thread->synch_cs);
2992 if ((thread->state & ThreadState_Suspended) != 0 ||
2993 (thread->state & ThreadState_StopRequested) != 0 ||
2994 (thread->state & ThreadState_Stopped) != 0) {
2995 LeaveCriticalSection (thread->synch_cs);
2996 CloseHandle (wait->handles [i]);
2997 wait->threads [i] = NULL; /* ignore this thread in next loop */
3001 if ((thread->state & ThreadState_SuspendRequested) == 0)
3002 signal_suspend = TRUE;
3004 events [eventidx++] = thread->suspended_event;
3006 /* Convert abort requests into suspend requests */
3007 if ((thread->state & ThreadState_AbortRequested) != 0)
3008 thread->state &= ~ThreadState_AbortRequested;
3010 thread->state |= ThreadState_SuspendRequested;
3012 LeaveCriticalSection (thread->synch_cs);
3014 /* Signal the thread to suspend */
3015 if (mono_thread_info_new_interrupt_enabled ())
3016 suspend_thread_internal (thread, TRUE);
3017 else if (signal_suspend)
3018 signal_thread_state_change (thread);
3021 /*Only wait on the suspend event if we are using the old path */
3022 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3023 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3024 for (i = 0; i < wait->num; ++i) {
3025 MonoInternalThread *thread = wait->threads [i];
3030 ensure_synch_cs_set (thread);
3032 EnterCriticalSection (thread->synch_cs);
3033 if ((thread->state & ThreadState_Suspended) != 0) {
3034 CloseHandle (thread->suspended_event);
3035 thread->suspended_event = NULL;
3037 LeaveCriticalSection (thread->synch_cs);
3041 if (eventidx <= 0) {
3043 * If there are threads which are starting up, we wait until they
3044 * are suspended when they try to register in the threads hash.
3045 * This is guaranteed to finish, since the threads which can create new
3046 * threads get suspended after a while.
3047 * FIXME: The finalizer thread can still create new threads.
3049 mono_threads_lock ();
3050 if (threads_starting_up)
3051 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3054 mono_threads_unlock ();
3066 collect_threads (gpointer key, gpointer value, gpointer user_data)
3068 MonoInternalThread *thread = (MonoInternalThread*)value;
3069 struct wait_data *wait = (struct wait_data*)user_data;
3072 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3073 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3077 wait->handles [wait->num] = handle;
3078 wait->threads [wait->num] = thread;
3083 static gboolean thread_dump_requested;
3085 static G_GNUC_UNUSED gboolean
3086 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3088 GString *p = (GString*)data;
3089 MonoMethod *method = NULL;
3091 method = frame->ji->method;
3094 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3095 g_string_append_printf (p, " %s\n", location);
3098 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3104 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3106 GString* text = g_string_new (0);
3108 GError *error = NULL;
3111 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3113 g_string_append_printf (text, "\n\"%s\"", name);
3116 else if (thread->threadpool_thread)
3117 g_string_append (text, "\n\"<threadpool thread>\"");
3119 g_string_append (text, "\n\"<unnamed thread>\"");
3122 /* This no longer works with remote unwinding */
3124 wapi_desc = wapi_current_thread_desc ();
3125 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3130 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3131 mono_thread_info_resume (mono_thread_info_get_tid (info));
3133 fprintf (stdout, "%s", text->str);
3135 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3136 OutputDebugStringA(text->str);
3139 g_string_free (text, TRUE);
3144 dump_thread (gpointer key, gpointer value, gpointer user)
3146 MonoInternalThread *thread = (MonoInternalThread *)value;
3147 MonoThreadInfo *info;
3149 if (thread == mono_thread_internal_current ())
3153 FIXME This still can hang if we stop a thread during malloc.
3154 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3155 that takes a callback and runs it with the target suspended.
3156 We probably should loop a bit around trying to get it to either managed code
3159 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3164 print_thread_dump (thread, info);
3168 mono_threads_perform_thread_dump (void)
3170 if (!thread_dump_requested)
3173 printf ("Full thread dump:\n");
3176 * Make a copy of the hashtable since we can't do anything with
3177 * threads while threads_mutex is held.
3179 mono_threads_lock ();
3180 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3181 mono_threads_unlock ();
3183 thread_dump_requested = FALSE;
3187 * mono_threads_request_thread_dump:
3189 * Ask all threads except the current to print their stacktrace to stdout.
3192 mono_threads_request_thread_dump (void)
3194 struct wait_data wait_data;
3195 struct wait_data *wait = &wait_data;
3198 /*The new thread dump code runs out of the finalizer thread. */
3199 if (mono_thread_info_new_interrupt_enabled ()) {
3200 thread_dump_requested = TRUE;
3201 mono_gc_finalize_notify ();
3206 memset (wait, 0, sizeof (struct wait_data));
3209 * Make a copy of the hashtable since we can't do anything with
3210 * threads while threads_mutex is held.
3212 mono_threads_lock ();
3213 mono_g_hash_table_foreach (threads, collect_threads, wait);
3214 mono_threads_unlock ();
3216 for (i = 0; i < wait->num; ++i) {
3217 MonoInternalThread *thread = wait->threads [i];
3219 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3220 (thread != mono_thread_internal_current ()) &&
3221 !thread->thread_dump_requested) {
3222 thread->thread_dump_requested = TRUE;
3224 signal_thread_state_change (thread);
3227 CloseHandle (wait->handles [i]);
3233 gint allocated; /* +1 so that refs [allocated] == NULL */
3237 typedef struct ref_stack RefStack;
3240 ref_stack_new (gint initial_size)
3244 initial_size = MAX (initial_size, 16) + 1;
3245 rs = g_new0 (RefStack, 1);
3246 rs->refs = g_new0 (gpointer, initial_size);
3247 rs->allocated = initial_size;
3252 ref_stack_destroy (gpointer ptr)
3263 ref_stack_push (RefStack *rs, gpointer ptr)
3265 g_assert (rs != NULL);
3267 if (rs->bottom >= rs->allocated) {
3268 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3269 rs->allocated <<= 1;
3270 rs->refs [rs->allocated] = NULL;
3272 rs->refs [rs->bottom++] = ptr;
3276 ref_stack_pop (RefStack *rs)
3278 if (rs == NULL || rs->bottom == 0)
3282 rs->refs [rs->bottom] = NULL;
3286 ref_stack_find (RefStack *rs, gpointer ptr)
3293 for (refs = rs->refs; refs && *refs; refs++) {
3301 * mono_thread_push_appdomain_ref:
3303 * Register that the current thread may have references to objects in domain
3304 * @domain on its stack. Each call to this function should be paired with a
3305 * call to pop_appdomain_ref.
3308 mono_thread_push_appdomain_ref (MonoDomain *domain)
3310 MonoInternalThread *thread = mono_thread_internal_current ();
3313 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3314 SPIN_LOCK (thread->lock_thread_id);
3315 if (thread->appdomain_refs == NULL)
3316 thread->appdomain_refs = ref_stack_new (16);
3317 ref_stack_push (thread->appdomain_refs, domain);
3318 SPIN_UNLOCK (thread->lock_thread_id);
3323 mono_thread_pop_appdomain_ref (void)
3325 MonoInternalThread *thread = mono_thread_internal_current ();
3328 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3329 SPIN_LOCK (thread->lock_thread_id);
3330 ref_stack_pop (thread->appdomain_refs);
3331 SPIN_UNLOCK (thread->lock_thread_id);
3336 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3339 SPIN_LOCK (thread->lock_thread_id);
3340 res = ref_stack_find (thread->appdomain_refs, domain);
3341 SPIN_UNLOCK (thread->lock_thread_id);
3346 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3348 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3351 typedef struct abort_appdomain_data {
3352 struct wait_data wait;
3354 } abort_appdomain_data;
3357 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3359 MonoInternalThread *thread = (MonoInternalThread*)value;
3360 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3361 MonoDomain *domain = data->domain;
3363 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3364 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3366 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3367 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3370 data->wait.handles [data->wait.num] = handle;
3371 data->wait.threads [data->wait.num] = thread;
3374 /* Just ignore the rest, we can't do anything with
3382 * mono_threads_abort_appdomain_threads:
3384 * Abort threads which has references to the given appdomain.
3387 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3389 abort_appdomain_data user_data;
3391 int orig_timeout = timeout;
3394 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3396 start_time = mono_msec_ticks ();
3398 mono_threads_lock ();
3400 user_data.domain = domain;
3401 user_data.wait.num = 0;
3402 /* This shouldn't take any locks */
3403 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3404 mono_threads_unlock ();
3406 if (user_data.wait.num > 0) {
3407 /* Abort the threads outside the threads lock */
3408 for (i = 0; i < user_data.wait.num; ++i)
3409 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3412 * We should wait for the threads either to abort, or to leave the
3413 * domain. We can't do the latter, so we wait with a timeout.
3415 wait_for_tids (&user_data.wait, 100);
3418 /* Update remaining time */
3419 timeout -= mono_msec_ticks () - start_time;
3420 start_time = mono_msec_ticks ();
3422 if (orig_timeout != -1 && timeout < 0)
3425 while (user_data.wait.num > 0);
3427 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3433 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3435 MonoInternalThread *thread = (MonoInternalThread*)value;
3436 MonoDomain *domain = (MonoDomain*)user_data;
3439 /* No locking needed here */
3440 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3442 if (thread->cached_culture_info) {
3443 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3444 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3445 if (obj && obj->vtable->domain == domain)
3446 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3452 * mono_threads_clear_cached_culture:
3454 * Clear the cached_current_culture from all threads if it is in the
3458 mono_threads_clear_cached_culture (MonoDomain *domain)
3460 mono_threads_lock ();
3461 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3462 mono_threads_unlock ();
3466 * mono_thread_get_undeniable_exception:
3468 * Return an exception which needs to be raised when leaving a catch clause.
3469 * This is used for undeniable exception propagation.
3472 mono_thread_get_undeniable_exception (void)
3474 MonoInternalThread *thread = mono_thread_internal_current ();
3476 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3478 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3479 * exception if the thread no longer references a dying appdomain.
3481 thread->abort_exc->trace_ips = NULL;
3482 thread->abort_exc->stack_trace = NULL;
3483 return thread->abort_exc;
3489 #if MONO_SMALL_CONFIG
3490 #define NUM_STATIC_DATA_IDX 4
3491 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3495 #define NUM_STATIC_DATA_IDX 8
3496 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3497 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3501 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3505 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3508 gpointer *static_data = addr;
3509 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3512 if (!static_data [i])
3514 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3515 ptr = static_data [i];
3516 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3517 uintptr_t bmap = static_reference_bitmaps [i][j];
3520 if ((bmap & 1) && *p) {
3532 * mono_alloc_static_data
3534 * Allocate memory blocks for storing threads or context static data
3537 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3539 guint idx = (offset >> 24) - 1;
3542 gpointer* static_data = *static_data_ptr;
3544 static void* tls_desc = NULL;
3547 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3549 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3550 *static_data_ptr = static_data;
3551 static_data [0] = static_data;
3554 for (i = 1; i <= idx; ++i) {
3555 if (static_data [i])
3558 static_data [i] = threadlocal?g_malloc0 (static_data_size [i]):mono_gc_alloc_fixed (static_data_size [i], NULL);
3560 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3566 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3569 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3570 if (!static_data [i])
3574 g_free (static_data [i]);
3576 mono_gc_free_fixed (static_data [i]);
3578 mono_gc_free_fixed (static_data [i]);
3581 mono_gc_free_fixed (static_data);
3585 * mono_init_static_data_info
3587 * Initializes static data counters
3589 static void mono_init_static_data_info (StaticDataInfo *static_data)
3591 static_data->idx = 0;
3592 static_data->offset = 0;
3593 static_data->freelist = NULL;
3597 * mono_alloc_static_data_slot
3599 * Generates an offset for static data. static_data contains the counters
3600 * used to generate it.
3603 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3607 if (!static_data->idx && !static_data->offset) {
3609 * we use the first chunk of the first allocation also as
3610 * an array for the rest of the data
3612 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3614 static_data->offset += align - 1;
3615 static_data->offset &= ~(align - 1);
3616 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3617 static_data->idx ++;
3618 g_assert (size <= static_data_size [static_data->idx]);
3619 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3620 static_data->offset = 0;
3622 offset = static_data->offset | ((static_data->idx + 1) << 24);
3623 static_data->offset += size;
3628 * ensure thread static fields already allocated are valid for thread
3629 * This function is called when a thread is created or on thread attach.
3632 thread_adjust_static_data (MonoInternalThread *thread)
3636 mono_threads_lock ();
3637 if (thread_static_info.offset || thread_static_info.idx > 0) {
3638 /* get the current allocated size */
3639 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3640 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3642 mono_threads_unlock ();
3646 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3648 MonoInternalThread *thread = value;
3649 guint32 offset = GPOINTER_TO_UINT (user);
3651 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3654 static MonoThreadDomainTls*
3655 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3657 MonoThreadDomainTls* prev = NULL;
3658 MonoThreadDomainTls* tmp = static_data->freelist;
3660 if (tmp->size == size) {
3662 prev->next = tmp->next;
3664 static_data->freelist = tmp->next;
3673 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int max_set)
3676 int idx = (offset >> 24) - 1;
3678 if (!static_reference_bitmaps [idx])
3679 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3680 rb = static_reference_bitmaps [idx];
3682 offset /= sizeof (gpointer);
3683 /* offset is now the bitmap offset */
3684 for (i = 0; i < max_set; ++i) {
3685 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3686 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3691 clear_reference_bitmap (guint32 offset, guint32 size)
3693 int idx = (offset >> 24) - 1;
3695 rb = static_reference_bitmaps [idx];
3697 offset /= sizeof (gpointer);
3698 size /= sizeof (gpointer);
3700 /* offset is now the bitmap offset */
3701 for (; offset < size; ++offset)
3702 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3706 * The offset for a special static variable is composed of three parts:
3707 * a bit that indicates the type of static data (0:thread, 1:context),
3708 * an index in the array of chunks of memory for the thread (thread->static_data)
3709 * and an offset in that chunk of mem. This allows allocating less memory in the
3714 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int max_set)
3717 if (static_type == SPECIAL_STATIC_THREAD) {
3718 MonoThreadDomainTls *item;
3719 mono_threads_lock ();
3720 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3721 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3723 offset = item->offset;
3726 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3728 update_tls_reference_bitmap (offset, bitmap, max_set);
3729 /* This can be called during startup */
3730 if (threads != NULL)
3731 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3732 mono_threads_unlock ();
3734 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3735 mono_contexts_lock ();
3736 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3737 mono_contexts_unlock ();
3738 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3744 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3746 /* The high bit means either thread (0) or static (1) data. */
3748 guint32 static_type = (offset & 0x80000000);
3751 offset &= 0x7fffffff;
3752 idx = (offset >> 24) - 1;
3754 if (static_type == 0) {
3755 return get_thread_static_data (thread, offset);
3757 /* Allocate static data block under demand, since we don't have a list
3760 MonoAppContext *context = mono_context_get ();
3761 if (!context->static_data || !context->static_data [idx]) {
3762 mono_contexts_lock ();
3763 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3764 mono_contexts_unlock ();
3766 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3771 mono_get_special_static_data (guint32 offset)
3773 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3782 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3784 MonoInternalThread *thread = value;
3785 TlsOffsetSize *data = user;
3786 int idx = (data->offset >> 24) - 1;
3789 if (!thread->static_data || !thread->static_data [idx])
3791 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3792 mono_gc_bzero (ptr, data->size);
3796 do_free_special_slot (guint32 offset, guint32 size)
3798 guint32 static_type = (offset & 0x80000000);
3799 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3800 if (static_type == 0) {
3802 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3803 data.offset = offset & 0x7fffffff;
3805 clear_reference_bitmap (data.offset, data.size);
3806 if (threads != NULL)
3807 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3808 item->offset = offset;
3811 if (!mono_runtime_is_shutting_down ()) {
3812 item->next = thread_static_info.freelist;
3813 thread_static_info.freelist = item;
3815 /* We could be called during shutdown after mono_thread_cleanup () is called */
3819 /* FIXME: free context static data as well */
3824 do_free_special (gpointer key, gpointer value, gpointer data)
3826 MonoClassField *field = key;
3827 guint32 offset = GPOINTER_TO_UINT (value);
3830 size = mono_type_size (field->type, &align);
3831 do_free_special_slot (offset, size);
3835 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3837 mono_threads_lock ();
3838 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3839 mono_threads_unlock ();
3843 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3845 mono_threads_lock ();
3846 do_free_special_slot (offset, size);
3847 mono_threads_unlock ();
3851 * allocates room in the thread local area for storing an instance of the struct type
3852 * the allocation is kept track of in domain->tlsrec_list.
3855 mono_thread_alloc_tls (MonoReflectionType *type)
3857 MonoDomain *domain = mono_domain_get ();
3859 MonoTlsDataRecord *tlsrec;
3862 gsize default_bitmap [4] = {0};
3863 uint32_t tls_offset;
3867 klass = mono_class_from_mono_type (type->type);
3868 /* TlsDatum is a struct, so we subtract the object header size offset */
3869 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3870 size = mono_type_size (type->type, &align);
3871 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, bitmap, max_set);
3872 if (bitmap != default_bitmap)
3874 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3875 tlsrec->tls_offset = tls_offset;
3876 tlsrec->size = size;
3877 mono_domain_lock (domain);
3878 tlsrec->next = domain->tlsrec_list;
3879 domain->tlsrec_list = tlsrec;
3880 mono_domain_unlock (domain);
3885 mono_thread_destroy_tls (uint32_t tls_offset)
3887 MonoTlsDataRecord *prev = NULL;
3888 MonoTlsDataRecord *cur;
3890 MonoDomain *domain = mono_domain_get ();
3891 mono_domain_lock (domain);
3892 cur = domain->tlsrec_list;
3894 if (cur->tls_offset == tls_offset) {
3896 prev->next = cur->next;
3898 domain->tlsrec_list = cur->next;
3906 mono_domain_unlock (domain);
3908 mono_special_static_data_free_slot (tls_offset, size);
3912 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3915 mono_thread_destroy_domain_tls (MonoDomain *domain)
3917 while (domain->tlsrec_list)
3918 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3921 static MonoClassField *local_slots = NULL;
3924 /* local tls data to get locals_slot from a thread */
3927 /* index in the locals_slot array */
3932 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3934 LocalSlotID *sid = user_data;
3935 MonoInternalThread *thread = (MonoInternalThread*)value;
3936 MonoArray *slots_array;
3938 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3939 * it is for the right domain, so we need to check if it is allocated an initialized
3940 * for the current thread.
3942 /*g_print ("handling thread %p\n", thread);*/
3943 if (!thread->static_data || !thread->static_data [sid->idx])
3945 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3946 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3948 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3952 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3960 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3962 g_warning ("local_slots field not found in Thread class");
3966 domain = mono_domain_get ();
3967 mono_domain_lock (domain);
3968 if (domain->special_static_fields)
3969 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3970 mono_domain_unlock (domain);
3973 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3974 sid.offset = GPOINTER_TO_UINT (addr);
3975 sid.offset &= 0x7fffffff;
3976 sid.idx = (sid.offset >> 24) - 1;
3977 mono_threads_lock ();
3978 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3979 mono_threads_unlock ();
3981 /* FIXME: clear the slot for MonoAppContexts, too */
3986 static void CALLBACK dummy_apc (ULONG_PTR param)
3990 static guint32 dummy_apc (gpointer param)
3997 * mono_thread_execute_interruption
3999 * Performs the operation that the requested thread state requires (abort,
4002 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4004 ensure_synch_cs_set (thread);
4006 EnterCriticalSection (thread->synch_cs);
4008 /* MonoThread::interruption_requested can only be changed with atomics */
4009 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4010 /* this will consume pending APC calls */
4011 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4012 InterlockedDecrement (&thread_interruption_requested);
4014 /* Clear the interrupted flag of the thread so it can wait again */
4015 wapi_clear_interruption ();
4019 if ((thread->state & ThreadState_AbortRequested) != 0) {
4020 LeaveCriticalSection (thread->synch_cs);
4021 if (thread->abort_exc == NULL) {
4023 * This might be racy, but it has to be called outside the lock
4024 * since it calls managed code.
4026 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4028 return thread->abort_exc;
4030 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4031 self_suspend_internal (thread);
4034 else if ((thread->state & ThreadState_StopRequested) != 0) {
4035 /* FIXME: do this through the JIT? */
4037 LeaveCriticalSection (thread->synch_cs);
4039 mono_thread_exit ();
4041 } else if (thread->pending_exception) {
4044 exc = thread->pending_exception;
4045 thread->pending_exception = NULL;
4047 LeaveCriticalSection (thread->synch_cs);
4049 } else if (thread->thread_interrupt_requested) {
4051 thread->thread_interrupt_requested = FALSE;
4052 LeaveCriticalSection (thread->synch_cs);
4054 return(mono_get_exception_thread_interrupted ());
4057 LeaveCriticalSection (thread->synch_cs);
4063 * mono_thread_request_interruption
4065 * A signal handler can call this method to request the interruption of a
4066 * thread. The result of the interruption will depend on the current state of
4067 * the thread. If the result is an exception that needs to be throw, it is
4068 * provided as return value.
4071 mono_thread_request_interruption (gboolean running_managed)
4073 MonoInternalThread *thread = mono_thread_internal_current ();
4075 /* The thread may already be stopping */
4080 if (thread->interrupt_on_stop &&
4081 thread->state & ThreadState_StopRequested &&
4082 thread->state & ThreadState_Background)
4086 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4089 if (!running_managed || is_running_protected_wrapper ()) {
4090 /* Can't stop while in unmanaged code. Increase the global interruption
4091 request count. When exiting the unmanaged method the count will be
4092 checked and the thread will be interrupted. */
4094 InterlockedIncrement (&thread_interruption_requested);
4096 if (mono_thread_notify_pending_exc_fn && !running_managed)
4097 /* The JIT will notify the thread about the interruption */
4098 /* This shouldn't take any locks */
4099 mono_thread_notify_pending_exc_fn ();
4101 /* this will awake the thread if it is in WaitForSingleObject
4103 /* Our implementation of this function ignores the func argument */
4104 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4108 return mono_thread_execute_interruption (thread);
4112 /*This function should be called by a thread after it has exited all of
4113 * its handle blocks at interruption time.*/
4115 mono_thread_resume_interruption (void)
4117 MonoInternalThread *thread = mono_thread_internal_current ();
4118 gboolean still_aborting;
4120 /* The thread may already be stopping */
4124 ensure_synch_cs_set (thread);
4125 EnterCriticalSection (thread->synch_cs);
4126 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4127 LeaveCriticalSection (thread->synch_cs);
4129 /*This can happen if the protected block called Thread::ResetAbort*/
4130 if (!still_aborting)
4133 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4135 InterlockedIncrement (&thread_interruption_requested);
4138 wapi_self_interrupt ();
4140 return mono_thread_execute_interruption (thread);
4143 gboolean mono_thread_interruption_requested ()
4145 if (thread_interruption_requested) {
4146 MonoInternalThread *thread = mono_thread_internal_current ();
4147 /* The thread may already be stopping */
4149 return (thread->interruption_requested);
4154 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4156 MonoInternalThread *thread = mono_thread_internal_current ();
4158 /* The thread may already be stopping */
4162 mono_debugger_check_interruption ();
4164 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4165 MonoException* exc = mono_thread_execute_interruption (thread);
4166 if (exc) mono_raise_exception (exc);
4171 * Performs the interruption of the current thread, if one has been requested,
4172 * and the thread is not running a protected wrapper.
4174 void mono_thread_interruption_checkpoint ()
4176 mono_thread_interruption_checkpoint_request (FALSE);
4180 * Performs the interruption of the current thread, if one has been requested.
4182 void mono_thread_force_interruption_checkpoint ()
4184 mono_thread_interruption_checkpoint_request (TRUE);
4188 * mono_thread_get_and_clear_pending_exception:
4190 * Return any pending exceptions for the current thread and clear it as a side effect.
4193 mono_thread_get_and_clear_pending_exception (void)
4195 MonoInternalThread *thread = mono_thread_internal_current ();
4197 /* The thread may already be stopping */
4201 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4202 return mono_thread_execute_interruption (thread);
4205 if (thread->pending_exception) {
4206 MonoException *exc = thread->pending_exception;
4208 thread->pending_exception = NULL;
4216 * mono_set_pending_exception:
4218 * Set the pending exception of the current thread to EXC.
4219 * The exception will be thrown when execution returns to managed code.
4222 mono_set_pending_exception (MonoException *exc)
4224 MonoInternalThread *thread = mono_thread_internal_current ();
4226 /* The thread may already be stopping */
4230 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4232 mono_thread_request_interruption (FALSE);
4236 * mono_thread_interruption_request_flag:
4238 * Returns the address of a flag that will be non-zero if an interruption has
4239 * been requested for a thread. The thread to interrupt may not be the current
4240 * thread, so an additional call to mono_thread_interruption_requested() or
4241 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4244 gint32* mono_thread_interruption_request_flag ()
4246 return &thread_interruption_requested;
4250 mono_thread_init_apartment_state (void)
4253 MonoInternalThread* thread = mono_thread_internal_current ();
4255 /* Positive return value indicates success, either
4256 * S_OK if this is first CoInitialize call, or
4257 * S_FALSE if CoInitialize already called, but with same
4258 * threading model. A negative value indicates failure,
4259 * probably due to trying to change the threading model.
4261 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4262 ? COINIT_APARTMENTTHREADED
4263 : COINIT_MULTITHREADED) < 0) {
4264 thread->apartment_state = ThreadApartmentState_Unknown;
4270 mono_thread_cleanup_apartment_state (void)
4273 MonoInternalThread* thread = mono_thread_internal_current ();
4275 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4282 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4284 ensure_synch_cs_set (thread);
4286 EnterCriticalSection (thread->synch_cs);
4287 thread->state |= state;
4288 LeaveCriticalSection (thread->synch_cs);
4292 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4294 ensure_synch_cs_set (thread);
4296 EnterCriticalSection (thread->synch_cs);
4297 thread->state &= ~state;
4298 LeaveCriticalSection (thread->synch_cs);
4302 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4304 gboolean ret = FALSE;
4306 ensure_synch_cs_set (thread);
4308 EnterCriticalSection (thread->synch_cs);
4310 if ((thread->state & test) != 0) {
4314 LeaveCriticalSection (thread->synch_cs);
4319 //static MonoClassField *execution_context_field;
4322 get_execution_context_addr (void)
4324 MonoDomain *domain = mono_domain_get ();
4325 guint32 offset = domain->execution_context_field_offset;
4328 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4331 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4333 mono_domain_lock (domain);
4334 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4335 mono_domain_unlock (domain);
4338 domain->execution_context_field_offset = offset;
4341 return (MonoObject**) mono_get_special_static_data (offset);
4345 mono_thread_get_execution_context (void)
4347 return *get_execution_context_addr ();
4351 mono_thread_set_execution_context (MonoObject *ec)
4353 *get_execution_context_addr () = ec;
4356 static gboolean has_tls_get = FALSE;
4359 mono_runtime_set_has_tls_get (gboolean val)
4365 mono_runtime_has_tls_get (void)
4371 mono_thread_kill (MonoInternalThread *thread, int signal)
4374 /* Win32 uses QueueUserAPC and callers of this are guarded */
4375 g_assert_not_reached ();
4377 # ifdef PTHREAD_POINTER_ID
4378 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4380 # ifdef PLATFORM_ANDROID
4381 if (thread->android_tid != 0) {
4383 int old_errno = errno;
4385 ret = tkill ((pid_t) thread->android_tid, signal);
4394 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4396 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4403 self_interrupt_thread (void *_unused)
4405 MonoThreadInfo *info = mono_thread_info_current ();
4406 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4407 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4408 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4409 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4413 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4417 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4421 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4423 MonoJitInfo **dest = data;
4429 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4431 MonoJitInfo *ji = NULL;
4432 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4437 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4440 MonoThreadInfo *info = NULL;
4441 gboolean protected_wrapper;
4442 gboolean running_managed;
4444 if (!mono_thread_info_new_interrupt_enabled ()) {
4445 signal_thread_state_change (thread);
4450 FIXME this is insanely broken, it doesn't cause interruption to happen
4451 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4453 if (thread == mono_thread_internal_current ()) {
4454 /* Do it synchronously */
4455 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4457 mono_raise_exception (exc);
4459 wapi_interrupt_thread (thread->handle);
4464 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4465 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4469 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4470 mono_thread_info_resume (mono_thread_info_get_tid (info));
4474 /*someone is already interrupting it*/
4475 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4476 mono_thread_info_resume (mono_thread_info_get_tid (info));
4480 ji = mono_thread_info_get_last_managed (info);
4481 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4482 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4484 if (!protected_wrapper && running_managed) {
4485 /*We are in managed code*/
4486 /*Set the thread to call */
4487 if (install_async_abort)
4488 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4489 mono_thread_info_resume (mono_thread_info_get_tid (info));
4491 gpointer interrupt_handle;
4493 * This will cause waits to be broken.
4494 * It will also prevent the thread from entering a wait, so if the thread returns
4495 * from the wait before it receives the abort signal, it will just spin in the wait
4496 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4499 InterlockedIncrement (&thread_interruption_requested);
4501 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4503 mono_thread_info_resume (mono_thread_info_get_tid (info));
4505 wapi_finish_interrupt_thread (interrupt_handle);
4508 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4512 transition_to_suspended (MonoInternalThread *thread)
4514 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4515 g_assert (0); /*FIXME we should not reach this */
4516 /*Make sure we balance the suspend count.*/
4517 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4519 thread->state &= ~ThreadState_SuspendRequested;
4520 thread->state |= ThreadState_Suspended;
4522 LeaveCriticalSection (thread->synch_cs);
4526 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4528 if (!mono_thread_info_new_interrupt_enabled ()) {
4529 signal_thread_state_change (thread);
4533 EnterCriticalSection (thread->synch_cs);
4534 if (thread == mono_thread_internal_current ()) {
4535 transition_to_suspended (thread);
4536 mono_thread_info_self_suspend ();
4538 MonoThreadInfo *info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt);
4539 MonoJitInfo *ji = mono_thread_info_get_last_managed (info);
4540 gboolean protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4541 gboolean running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4543 if (running_managed && !protected_wrapper) {
4544 transition_to_suspended (thread);
4546 gpointer interrupt_handle;
4548 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4549 InterlockedIncrement (&thread_interruption_requested);
4552 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4554 mono_thread_info_resume (mono_thread_info_get_tid (info));
4557 wapi_finish_interrupt_thread (interrupt_handle);
4559 LeaveCriticalSection (thread->synch_cs);
4564 /*This is called with @thread synch_cs held and it must release it*/
4566 self_suspend_internal (MonoInternalThread *thread)
4568 if (!mono_thread_info_new_interrupt_enabled ()) {
4569 thread->state &= ~ThreadState_SuspendRequested;
4570 thread->state |= ThreadState_Suspended;
4571 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4572 if (thread->suspend_event == NULL) {
4573 LeaveCriticalSection (thread->synch_cs);
4576 if (thread->suspended_event)
4577 SetEvent (thread->suspended_event);
4579 LeaveCriticalSection (thread->synch_cs);
4581 if (shutting_down) {
4582 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4587 WaitForSingleObject (thread->suspend_event, INFINITE);
4589 EnterCriticalSection (thread->synch_cs);
4591 CloseHandle (thread->suspend_event);
4592 thread->suspend_event = NULL;
4593 thread->state &= ~ThreadState_Suspended;
4595 /* The thread that requested the resume will have replaced this event
4596 * and will be waiting for it
4598 SetEvent (thread->resume_event);
4600 LeaveCriticalSection (thread->synch_cs);
4604 transition_to_suspended (thread);
4605 mono_thread_info_self_suspend ();
4608 /*This is called with @thread synch_cs held and it must release it*/
4610 resume_thread_internal (MonoInternalThread *thread)
4612 if (!mono_thread_info_new_interrupt_enabled ()) {
4613 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4614 if (thread->resume_event == NULL) {
4615 LeaveCriticalSection (thread->synch_cs);
4619 /* Awake the thread */
4620 SetEvent (thread->suspend_event);
4622 LeaveCriticalSection (thread->synch_cs);
4624 /* Wait for the thread to awake */
4625 WaitForSingleObject (thread->resume_event, INFINITE);
4626 CloseHandle (thread->resume_event);
4627 thread->resume_event = NULL;
4631 LeaveCriticalSection (thread->synch_cs);
4632 /* Awake the thread */
4633 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4635 EnterCriticalSection (thread->synch_cs);
4636 thread->state &= ~ThreadState_Suspended;
4637 LeaveCriticalSection (thread->synch_cs);