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__) || defined(__FreeBSD__)
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 #if defined(PLATFORM_MACOSX) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
59 void *pthread_get_stackaddr_np(pthread_t);
60 size_t pthread_get_stacksize_np(pthread_t);
63 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
64 #define THREAD_DEBUG(a)
65 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
66 #define THREAD_WAIT_DEBUG(a)
67 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
68 #define LIBGC_DEBUG(a)
70 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
71 #define SPIN_LOCK(i) do { \
72 if (SPIN_TRYLOCK (i)) \
76 #define SPIN_UNLOCK(i) i = 0
78 /* Provide this for systems with glib < 2.6 */
79 #ifndef G_GSIZE_FORMAT
80 # if GLIB_SIZEOF_LONG == 8
81 # define G_GSIZE_FORMAT "lu"
83 # define G_GSIZE_FORMAT "u"
89 guint32 (*func)(void *);
105 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
106 struct _MonoThreadDomainTls {
107 MonoThreadDomainTls *next;
115 MonoThreadDomainTls *freelist;
118 /* Number of cached culture objects in the MonoThread->cached_culture_info array
119 * (per-type): we use the first NUM entries for CultureInfo and the last for
120 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
122 #define NUM_CACHED_CULTURES 4
123 #define CULTURES_START_IDX 0
124 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
126 /* Controls access to the 'threads' hash table */
127 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
128 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
129 static CRITICAL_SECTION threads_mutex;
131 /* Controls access to context static data */
132 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
133 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
134 static CRITICAL_SECTION contexts_mutex;
136 /* Holds current status of static data heap */
137 static StaticDataInfo thread_static_info;
138 static StaticDataInfo context_static_info;
140 /* The hash of existing threads (key is thread ID, value is
141 * MonoInternalThread*) that need joining before exit
143 static MonoGHashTable *threads=NULL;
146 * Threads which are starting up and they are not in the 'threads' hash yet.
147 * When handle_store is called for a thread, it will be removed from this hash table.
148 * Protected by mono_threads_lock ().
150 static MonoGHashTable *threads_starting_up = NULL;
152 /* Maps a MonoThread to its start argument */
153 /* Protected by mono_threads_lock () */
154 static MonoGHashTable *thread_start_args = NULL;
156 /* The TLS key that holds the MonoObject assigned to each thread */
157 static MonoNativeTlsKey current_object_key;
159 #ifdef MONO_HAVE_FAST_TLS
160 /* we need to use both the Tls* functions and __thread because
161 * the gc needs to see all the threads
163 MONO_FAST_TLS_DECLARE(tls_current_object);
164 #define SET_CURRENT_OBJECT(x) do { \
165 MONO_FAST_TLS_SET (tls_current_object, x); \
166 mono_native_tls_set_value (current_object_key, x); \
168 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
170 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
171 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
174 /* function called at thread start */
175 static MonoThreadStartCB mono_thread_start_cb = NULL;
177 /* function called at thread attach */
178 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
180 /* function called at thread cleanup */
181 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
183 /* function called to notify the runtime about a pending exception on the current thread */
184 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
186 /* The default stack size for each thread */
187 static guint32 default_stacksize = 0;
188 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
190 static void thread_adjust_static_data (MonoInternalThread *thread);
191 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
192 static void mono_init_static_data_info (StaticDataInfo *static_data);
193 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
194 static gboolean mono_thread_resume (MonoInternalThread* thread);
195 static void mono_thread_start (MonoThread *thread);
196 static void signal_thread_state_change (MonoInternalThread *thread);
197 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
198 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
199 static void self_suspend_internal (MonoInternalThread *thread);
200 static gboolean resume_thread_internal (MonoInternalThread *thread);
202 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
203 static void ref_stack_destroy (gpointer rs);
205 /* Spin lock for InterlockedXXX 64 bit functions */
206 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
207 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
208 static CRITICAL_SECTION interlocked_mutex;
210 /* global count of thread interruptions requested */
211 static gint32 thread_interruption_requested = 0;
213 /* Event signaled when a thread changes its background mode */
214 static HANDLE background_change_event;
216 static gboolean shutting_down = FALSE;
218 static gint32 managed_thread_id_counter = 0;
221 get_next_managed_thread_id (void)
223 return InterlockedIncrement (&managed_thread_id_counter);
227 mono_thread_get_tls_key (void)
229 return current_object_key;
233 mono_thread_get_tls_offset (void)
236 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
240 /* handle_store() and handle_remove() manage the array of threads that
241 * still need to be waited for when the main thread exits.
243 * If handle_store() returns FALSE the thread must not be started
244 * because Mono is shutting down.
246 static gboolean handle_store(MonoThread *thread)
248 mono_threads_lock ();
250 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
252 if (threads_starting_up)
253 mono_g_hash_table_remove (threads_starting_up, thread);
256 mono_threads_unlock ();
261 MONO_GC_REGISTER_ROOT_FIXED (threads);
262 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
265 /* We don't need to duplicate thread->handle, because it is
266 * only closed when the thread object is finalized by the GC.
268 g_assert (thread->internal_thread);
269 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
270 thread->internal_thread);
272 mono_threads_unlock ();
277 static gboolean handle_remove(MonoInternalThread *thread)
280 gsize tid = thread->tid;
282 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
284 mono_threads_lock ();
287 /* We have to check whether the thread object for the
288 * tid is still the same in the table because the
289 * thread might have been destroyed and the tid reused
290 * in the meantime, in which case the tid would be in
291 * the table, but with another thread object.
293 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
294 mono_g_hash_table_remove (threads, (gpointer)tid);
303 mono_threads_unlock ();
305 /* Don't close the handle here, wait for the object finalizer
306 * to do it. Otherwise, the following race condition applies:
308 * 1) Thread exits (and handle_remove() closes the handle)
310 * 2) Some other handle is reassigned the same slot
312 * 3) Another thread tries to join the first thread, and
313 * blocks waiting for the reassigned handle to be signalled
314 * (which might never happen). This is possible, because the
315 * thread calling Join() still has a reference to the first
321 static void ensure_synch_cs_set (MonoInternalThread *thread)
323 CRITICAL_SECTION *synch_cs;
325 if (thread->synch_cs != NULL) {
329 synch_cs = g_new0 (CRITICAL_SECTION, 1);
330 InitializeCriticalSection (synch_cs);
332 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
333 synch_cs, NULL) != NULL) {
334 /* Another thread must have installed this CS */
335 DeleteCriticalSection (synch_cs);
341 * NOTE: this function can be called also for threads different from the current one:
342 * make sure no code called from it will ever assume it is run on the thread that is
343 * getting cleaned up.
345 static void thread_cleanup (MonoInternalThread *thread)
347 g_assert (thread != NULL);
349 if (thread->abort_state_handle) {
350 mono_gchandle_free (thread->abort_state_handle);
351 thread->abort_state_handle = 0;
353 thread->abort_exc = NULL;
354 thread->current_appcontext = NULL;
357 * This is necessary because otherwise we might have
358 * cross-domain references which will not get cleaned up when
359 * the target domain is unloaded.
361 if (thread->cached_culture_info) {
363 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
364 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
367 /* if the thread is not in the hash it has been removed already */
368 if (!handle_remove (thread)) {
369 /* This needs to be called even if handle_remove () fails */
370 if (mono_thread_cleanup_fn)
371 mono_thread_cleanup_fn (thread);
374 mono_release_type_locks (thread);
376 ensure_synch_cs_set (thread);
378 EnterCriticalSection (thread->synch_cs);
380 thread->state |= ThreadState_Stopped;
381 thread->state &= ~ThreadState_Background;
383 LeaveCriticalSection (thread->synch_cs);
385 mono_profiler_thread_end (thread->tid);
387 if (thread == mono_thread_internal_current ())
388 mono_thread_pop_appdomain_ref ();
390 thread->cached_culture_info = NULL;
392 mono_free_static_data (thread->static_data, TRUE);
393 thread->static_data = NULL;
394 ref_stack_destroy (thread->appdomain_refs);
395 thread->appdomain_refs = NULL;
397 if (mono_thread_cleanup_fn)
398 mono_thread_cleanup_fn (thread);
400 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
404 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
407 g_assert ((offset & 0x80000000) == 0);
408 offset &= 0x7fffffff;
409 idx = (offset >> 24) - 1;
410 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
414 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
416 static MonoClassField *current_thread_field = NULL;
420 if (!current_thread_field) {
421 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
422 g_assert (current_thread_field);
425 mono_class_vtable (domain, mono_defaults.thread_class);
426 mono_domain_lock (domain);
427 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
428 mono_domain_unlock (domain);
431 return get_thread_static_data (thread, offset);
435 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
437 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
439 g_assert (current->obj.vtable->domain == domain);
441 g_assert (!*current_thread_ptr);
442 *current_thread_ptr = current;
445 static MonoInternalThread*
446 create_internal_thread_object (void)
448 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
449 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
453 create_thread_object (MonoDomain *domain)
455 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
456 return (MonoThread*)mono_gc_alloc_mature (vt);
460 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
462 MonoThread *thread = create_thread_object (domain);
463 MONO_OBJECT_SETREF (thread, internal_thread, internal);
468 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
470 MonoDomain *domain = mono_get_root_domain ();
472 if (!candidate || candidate->obj.vtable->domain != domain)
473 candidate = new_thread_with_internal (domain, thread);
474 set_current_thread_for_domain (domain, thread, candidate);
475 g_assert (!thread->root_domain_thread);
476 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
479 static guint32 WINAPI start_wrapper_internal(void *data)
481 MonoThreadInfo *info;
482 struct StartInfo *start_info=(struct StartInfo *)data;
483 guint32 (*start_func)(void *);
487 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
490 MonoInternalThread *internal = start_info->obj->internal_thread;
491 MonoObject *start_delegate = start_info->delegate;
492 MonoDomain *domain = start_info->obj->obj.vtable->domain;
494 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
496 /* We can be sure start_info->obj->tid and
497 * start_info->obj->handle have been set, because the thread
498 * was created suspended, and these values were set before the
502 info = mono_thread_info_current ();
504 internal->thread_info = info;
509 SET_CURRENT_OBJECT (internal);
511 mono_monitor_init_tls ();
513 /* Every thread references the appdomain which created it */
514 mono_thread_push_appdomain_ref (domain);
516 if (!mono_domain_set (domain, FALSE)) {
517 /* No point in raising an appdomain_unloaded exception here */
518 /* FIXME: Cleanup here */
519 mono_thread_pop_appdomain_ref ();
523 start_func = start_info->func;
524 start_arg = start_info->start_arg;
526 /* We have to do this here because mono_thread_new_init()
527 requires that root_domain_thread is set up. */
528 thread_adjust_static_data (internal);
529 init_root_domain_thread (internal, start_info->obj);
531 /* This MUST be called before any managed code can be
532 * executed, as it calls the callback function that (for the
533 * jit) sets the lmf marker.
535 mono_thread_new_init (tid, &tid, start_func);
536 internal->stack_ptr = &tid;
538 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
540 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
542 /* On 2.0 profile (and higher), set explicitly since state might have been
544 if (internal->apartment_state == ThreadApartmentState_Unknown)
545 internal->apartment_state = ThreadApartmentState_MTA;
547 mono_thread_init_apartment_state ();
549 if(internal->start_notify!=NULL) {
550 /* Let the thread that called Start() know we're
553 ReleaseSemaphore (internal->start_notify, 1, NULL);
556 mono_threads_lock ();
557 mono_g_hash_table_remove (thread_start_args, start_info->obj);
558 mono_threads_unlock ();
560 mono_thread_set_execution_context (start_info->obj->ec_to_set);
561 start_info->obj->ec_to_set = NULL;
564 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
568 * Call this after calling start_notify, since the profiler callback might want
569 * to lock the thread, and the lock is held by thread_start () which waits for
572 mono_profiler_thread_start (tid);
574 /* start_func is set only for unmanaged start functions */
576 start_func (start_arg);
579 g_assert (start_delegate != NULL);
580 args [0] = start_arg;
581 /* we may want to handle the exception here. See comment below on unhandled exceptions */
582 mono_runtime_delegate_invoke (start_delegate, args, NULL);
585 /* If the thread calls ExitThread at all, this remaining code
586 * will not be executed, but the main thread will eventually
587 * call thread_cleanup() on this thread's behalf.
590 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
592 thread_cleanup (internal);
594 /* Do any cleanup needed for apartment state. This
595 * cannot be done in thread_cleanup since thread_cleanup could be
596 * called for a thread other than the current thread.
597 * mono_thread_cleanup_apartment_state cleans up apartment
598 * for the current thead */
599 mono_thread_cleanup_apartment_state ();
601 /* Remove the reference to the thread object in the TLS data,
602 * so the thread object can be finalized. This won't be
603 * reached if the thread threw an uncaught exception, so those
604 * thread handles will stay referenced :-( (This is due to
605 * missing support for scanning thread-specific data in the
606 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
609 SET_CURRENT_OBJECT (NULL);
610 mono_domain_unset ();
615 static guint32 WINAPI start_wrapper(void *data)
619 /* Avoid scanning the frames above this frame during a GC */
620 mono_gc_set_stack_end ((void*)&dummy);
622 return start_wrapper_internal (data);
625 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
627 if (mono_thread_start_cb) {
628 mono_thread_start_cb (tid, stack_start, func);
632 void mono_threads_set_default_stacksize (guint32 stacksize)
634 default_stacksize = stacksize;
637 guint32 mono_threads_get_default_stacksize (void)
639 return default_stacksize;
643 * mono_create_thread:
645 * This is a wrapper around CreateThread which handles differences in the type of
646 * the the 'tid' argument.
648 gpointer mono_create_thread (WapiSecurityAttributes *security,
649 guint32 stacksize, WapiThreadStart start,
650 gpointer param, guint32 create, gsize *tid)
657 res = mono_threads_CreateThread (security, stacksize, start, param, create, &real_tid);
661 res = CreateThread (security, stacksize, start, param, create, tid);
668 * The thread start argument may be an object reference, and there is
669 * no ref to keep it alive when the new thread is started but not yet
670 * registered with the collector. So we store it in a GC tracked hash
673 * LOCKING: Assumes the threads lock is held.
676 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
678 if (thread_start_args == NULL) {
679 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
680 thread_start_args = mono_g_hash_table_new (NULL, NULL);
682 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
685 MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
688 MonoInternalThread *internal;
689 HANDLE thread_handle;
690 struct StartInfo *start_info;
693 thread = create_thread_object (domain);
694 internal = create_internal_thread_object ();
695 MONO_OBJECT_SETREF (thread, internal_thread, internal);
697 start_info=g_new0 (struct StartInfo, 1);
698 start_info->func = func;
699 start_info->obj = thread;
700 start_info->start_arg = arg;
702 mono_threads_lock ();
704 mono_threads_unlock ();
708 if (threads_starting_up == NULL) {
709 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
710 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
713 register_thread_start_argument (thread, start_info);
714 mono_g_hash_table_insert (threads_starting_up, thread, thread);
715 mono_threads_unlock ();
718 stack_size = default_stacksize_for_thread (internal);
720 /* Create suspended, so we can do some housekeeping before the thread
723 thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
724 CREATE_SUSPENDED, &tid);
725 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
726 if (thread_handle == NULL) {
727 /* The thread couldn't be created, so throw an exception */
728 mono_threads_lock ();
729 mono_g_hash_table_remove (threads_starting_up, thread);
730 mono_threads_unlock ();
732 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
736 internal->handle=thread_handle;
738 internal->apartment_state=ThreadApartmentState_Unknown;
739 internal->thread_pinning_ref = internal;
740 internal->managed_id = get_next_managed_thread_id ();
741 MONO_GC_REGISTER_ROOT (internal->thread_pinning_ref);
743 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
744 InitializeCriticalSection (internal->synch_cs);
746 internal->threadpool_thread = threadpool_thread;
747 if (threadpool_thread)
748 mono_thread_set_state (internal, ThreadState_Background);
750 if (handle_store (thread))
751 ResumeThread (thread_handle);
757 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
759 mono_thread_create_internal (domain, func, arg, FALSE, 0);
763 * mono_thread_get_stack_bounds:
765 * Return the address and size of the current threads stack. Return NULL as the
766 * stack address if the stack address cannot be determined.
769 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
771 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
772 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
773 *stsize = pthread_get_stacksize_np (pthread_self ());
775 /* staddr points to the start of the stack, not the end */
777 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
779 /* FIXME: simplify the mess below */
780 #elif !defined(HOST_WIN32)
782 guint8 *current = (guint8*)&attr;
784 pthread_attr_init (&attr);
785 # ifdef HAVE_PTHREAD_GETATTR_NP
786 pthread_getattr_np (pthread_self(), &attr);
788 # ifdef HAVE_PTHREAD_ATTR_GET_NP
789 pthread_attr_get_np (pthread_self(), &attr);
792 pthread_attr_getstacksize (&attr, &stsize);
793 # elif defined(__OpenBSD__)
797 rslt = pthread_stackseg_np(pthread_self(), &ss);
798 g_assert (rslt == 0);
800 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
801 *stsize = ss.ss_size;
810 # if !defined(__OpenBSD__)
811 pthread_attr_getstack (&attr, (void**)staddr, stsize);
814 g_assert ((current > *staddr) && (current < *staddr + *stsize));
817 pthread_attr_destroy (&attr);
820 *stsize = (size_t)-1;
823 /* When running under emacs, sometimes staddr is not aligned to a page size */
824 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
828 mono_thread_attach (MonoDomain *domain)
830 MonoInternalThread *thread;
831 MonoThread *current_thread;
832 HANDLE thread_handle;
835 if ((thread = mono_thread_internal_current ())) {
836 if (domain != mono_domain_get ())
837 mono_domain_set (domain, TRUE);
838 /* Already attached */
839 return mono_thread_current ();
842 if (!mono_gc_register_thread (&domain)) {
843 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 ());
846 thread = create_internal_thread_object ();
848 thread_handle = GetCurrentThread ();
849 g_assert (thread_handle);
851 tid=GetCurrentThreadId ();
854 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
855 * refer to the thread from other threads for things like aborting.
857 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
858 THREAD_ALL_ACCESS, TRUE, 0);
860 thread->handle=thread_handle;
862 #ifdef PLATFORM_ANDROID
863 thread->android_tid = (gpointer) gettid ();
865 thread->apartment_state=ThreadApartmentState_Unknown;
866 thread->thread_pinning_ref = thread;
867 thread->managed_id = get_next_managed_thread_id ();
868 MONO_GC_REGISTER_ROOT (thread->thread_pinning_ref);
870 thread->stack_ptr = &tid;
872 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
873 InitializeCriticalSection (thread->synch_cs);
875 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
877 current_thread = new_thread_with_internal (domain, thread);
879 if (!handle_store (current_thread)) {
880 /* Mono is shutting down, so just wait for the end */
885 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
887 SET_CURRENT_OBJECT (thread);
888 mono_domain_set (domain, TRUE);
890 mono_monitor_init_tls ();
892 thread_adjust_static_data (thread);
894 init_root_domain_thread (thread, current_thread);
895 if (domain != mono_get_root_domain ())
896 set_current_thread_for_domain (domain, thread, current_thread);
899 if (mono_thread_attach_cb) {
903 mono_thread_get_stack_bounds (&staddr, &stsize);
906 mono_thread_attach_cb (tid, &tid);
908 mono_thread_attach_cb (tid, staddr + stsize);
911 // FIXME: Need a separate callback
912 mono_profiler_thread_start (tid);
914 return current_thread;
918 mono_thread_detach (MonoThread *thread)
920 g_return_if_fail (thread != NULL);
922 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
924 mono_profiler_thread_end (thread->internal_thread->tid);
926 thread_cleanup (thread->internal_thread);
928 SET_CURRENT_OBJECT (NULL);
929 mono_domain_unset ();
931 /* Don't need to CloseHandle this thread, even though we took a
932 * reference in mono_thread_attach (), because the GC will do it
933 * when the Thread object is finalised.
940 MonoInternalThread *thread = mono_thread_internal_current ();
942 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
944 thread_cleanup (thread);
945 SET_CURRENT_OBJECT (NULL);
946 mono_domain_unset ();
948 /* we could add a callback here for embedders to use. */
949 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
950 exit (mono_environment_exitcode_get ());
955 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
957 MonoInternalThread *internal = create_internal_thread_object ();
959 internal->state = ThreadState_Unstarted;
960 internal->apartment_state = ThreadApartmentState_Unknown;
961 internal->managed_id = get_next_managed_thread_id ();
963 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
966 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
969 guint32 (*start_func)(void *);
970 struct StartInfo *start_info;
973 MonoInternalThread *internal;
975 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
977 if (!this->internal_thread)
978 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
979 internal = this->internal_thread;
981 ensure_synch_cs_set (internal);
983 EnterCriticalSection (internal->synch_cs);
985 if ((internal->state & ThreadState_Unstarted) == 0) {
986 LeaveCriticalSection (internal->synch_cs);
987 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
991 if ((internal->state & ThreadState_Aborted) != 0) {
992 LeaveCriticalSection (internal->synch_cs);
997 /* This is freed in start_wrapper */
998 start_info = g_new0 (struct StartInfo, 1);
999 start_info->func = start_func;
1000 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1001 start_info->delegate = start;
1002 start_info->obj = this;
1003 g_assert (this->obj.vtable->domain == mono_domain_get ());
1005 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1006 if (internal->start_notify==NULL) {
1007 LeaveCriticalSection (internal->synch_cs);
1008 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1009 g_free (start_info);
1013 mono_threads_lock ();
1014 register_thread_start_argument (this, start_info);
1015 if (threads_starting_up == NULL) {
1016 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1017 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1019 mono_g_hash_table_insert (threads_starting_up, this, this);
1020 mono_threads_unlock ();
1022 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1023 CREATE_SUSPENDED, &tid);
1025 LeaveCriticalSection (internal->synch_cs);
1026 mono_threads_lock ();
1027 mono_g_hash_table_remove (threads_starting_up, this);
1028 mono_threads_unlock ();
1029 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1033 internal->handle=thread;
1035 internal->thread_pinning_ref = internal;
1036 MONO_GC_REGISTER_ROOT (internal->thread_pinning_ref);
1039 /* Don't call handle_store() here, delay it to Start.
1040 * We can't join a thread (trying to will just block
1041 * forever) until it actually starts running, so don't
1042 * store the handle till then.
1045 mono_thread_start (this);
1047 internal->state &= ~ThreadState_Unstarted;
1049 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1051 LeaveCriticalSection (internal->synch_cs);
1056 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1058 MONO_ARCH_SAVE_REGS;
1060 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1063 CloseHandle (thread);
1065 if (this->synch_cs) {
1066 CRITICAL_SECTION *synch_cs = this->synch_cs;
1067 this->synch_cs = NULL;
1068 DeleteCriticalSection (synch_cs);
1073 void *name = this->name;
1079 static void mono_thread_start (MonoThread *thread)
1081 MonoInternalThread *internal = thread->internal_thread;
1083 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1085 /* Only store the handle when the thread is about to be
1086 * launched, to avoid the main thread deadlocking while trying
1087 * to clean up a thread that will never be signalled.
1089 if (!handle_store (thread))
1092 ResumeThread (internal->handle);
1094 if(internal->start_notify!=NULL) {
1095 /* Wait for the thread to set up its TLS data etc, so
1096 * theres no potential race condition if someone tries
1097 * to look up the data believing the thread has
1101 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1103 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1104 CloseHandle (internal->start_notify);
1105 internal->start_notify = NULL;
1108 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1111 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1114 MonoInternalThread *thread = mono_thread_internal_current ();
1116 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1118 mono_thread_current_check_pending_interrupt ();
1121 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1123 res = SleepEx(ms,TRUE);
1125 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1127 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1128 MonoException* exc = mono_thread_execute_interruption (thread);
1130 mono_raise_exception (exc);
1142 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1147 ves_icall_System_Threading_Thread_GetDomainID (void)
1149 MONO_ARCH_SAVE_REGS;
1151 return mono_domain_get()->domain_id;
1155 ves_icall_System_Threading_Thread_Yield (void)
1158 return SwitchToThread ();
1160 return sched_yield () == 0;
1165 * mono_thread_get_name:
1167 * Return the name of the thread. NAME_LEN is set to the length of the name.
1168 * Return NULL if the thread has no name. The returned memory is owned by the
1172 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1176 ensure_synch_cs_set (this_obj);
1178 EnterCriticalSection (this_obj->synch_cs);
1180 if (!this_obj->name) {
1184 *name_len = this_obj->name_len;
1185 res = g_new (gunichar2, this_obj->name_len);
1186 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1189 LeaveCriticalSection (this_obj->synch_cs);
1195 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1199 ensure_synch_cs_set (this_obj);
1201 EnterCriticalSection (this_obj->synch_cs);
1203 if (!this_obj->name)
1206 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1208 LeaveCriticalSection (this_obj->synch_cs);
1214 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1216 ensure_synch_cs_set (this_obj);
1218 EnterCriticalSection (this_obj->synch_cs);
1220 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1221 LeaveCriticalSection (this_obj->synch_cs);
1223 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1227 this_obj->name = g_new (gunichar2, mono_string_length (name));
1228 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1229 this_obj->name_len = mono_string_length (name);
1232 this_obj->name = NULL;
1235 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1237 LeaveCriticalSection (this_obj->synch_cs);
1238 if (this_obj->name) {
1239 char *tname = mono_string_to_utf8 (name);
1240 mono_profiler_thread_name (this_obj->tid, tname);
1246 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1248 mono_thread_set_name_internal (this_obj, name, TRUE);
1251 /* If the array is already in the requested domain, we just return it,
1252 otherwise we return a copy in that domain. */
1254 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1261 if (mono_object_domain (arr) == domain)
1264 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1265 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1270 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1272 return byte_array_to_domain (arr, mono_get_root_domain ());
1276 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1278 return byte_array_to_domain (arr, mono_domain_get ());
1282 mono_thread_current (void)
1284 MonoDomain *domain = mono_domain_get ();
1285 MonoInternalThread *internal = mono_thread_internal_current ();
1286 MonoThread **current_thread_ptr;
1288 g_assert (internal);
1289 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1291 if (!*current_thread_ptr) {
1292 g_assert (domain != mono_get_root_domain ());
1293 *current_thread_ptr = new_thread_with_internal (domain, internal);
1295 return *current_thread_ptr;
1299 mono_thread_internal_current (void)
1301 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1302 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1306 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1307 int ms, HANDLE thread)
1309 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1312 mono_thread_current_check_pending_interrupt ();
1314 ensure_synch_cs_set (this);
1316 EnterCriticalSection (this->synch_cs);
1318 if ((this->state & ThreadState_Unstarted) != 0) {
1319 LeaveCriticalSection (this->synch_cs);
1321 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1325 LeaveCriticalSection (this->synch_cs);
1330 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1332 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1334 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1336 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1338 if(ret==WAIT_OBJECT_0) {
1339 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1344 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1349 /* FIXME: exitContext isnt documented */
1350 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1356 MonoObject *waitHandle;
1357 MonoInternalThread *thread = mono_thread_internal_current ();
1359 /* Do this WaitSleepJoin check before creating objects */
1360 mono_thread_current_check_pending_interrupt ();
1362 numhandles = mono_array_length(mono_handles);
1363 handles = g_new0(HANDLE, numhandles);
1365 for(i = 0; i < numhandles; i++) {
1366 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1367 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1374 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1376 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1378 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1382 if(ret==WAIT_FAILED) {
1383 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1385 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1386 /* Do we want to try again if we get
1387 * WAIT_IO_COMPLETION? The documentation for
1388 * WaitHandle doesn't give any clues. (We'd have to
1389 * fiddle with the timeout if we retry.)
1391 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1398 /* FIXME: exitContext isnt documented */
1399 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1401 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1405 MonoObject *waitHandle;
1406 MonoInternalThread *thread = mono_thread_internal_current ();
1409 /* Do this WaitSleepJoin check before creating objects */
1410 mono_thread_current_check_pending_interrupt ();
1412 numhandles = mono_array_length(mono_handles);
1413 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1416 for(i = 0; i < numhandles; i++) {
1417 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1418 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1425 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1427 start = (ms == -1) ? 0 : mono_msec_ticks ();
1429 ret = WaitForMultipleObjectsEx (numhandles, handles, FALSE, ms, TRUE);
1430 if (ret != WAIT_IO_COMPLETION)
1435 diff = mono_msec_ticks () - start;
1440 } while (ms == -1 || ms > 0);
1442 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1444 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1447 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1449 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1450 return ret - WAIT_OBJECT_0;
1452 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1453 return ret - WAIT_ABANDONED_0;
1460 /* FIXME: exitContext isnt documented */
1461 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1464 MonoInternalThread *thread = mono_thread_internal_current ();
1466 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1472 mono_thread_current_check_pending_interrupt ();
1474 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1476 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1478 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1480 if(ret==WAIT_FAILED) {
1481 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1483 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1484 /* Do we want to try again if we get
1485 * WAIT_IO_COMPLETION? The documentation for
1486 * WaitHandle doesn't give any clues. (We'd have to
1487 * fiddle with the timeout if we retry.)
1489 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1497 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1500 MonoInternalThread *thread = mono_thread_internal_current ();
1502 MONO_ARCH_SAVE_REGS;
1507 mono_thread_current_check_pending_interrupt ();
1509 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1511 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1513 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1515 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1518 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1522 MONO_ARCH_SAVE_REGS;
1527 mutex = CreateMutex (NULL, owned, NULL);
1529 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1531 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1539 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1540 MONO_ARCH_SAVE_REGS;
1542 return(ReleaseMutex (handle));
1545 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1551 MONO_ARCH_SAVE_REGS;
1553 *error = ERROR_SUCCESS;
1555 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1557 *error = GetLastError ();
1564 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1568 MONO_ARCH_SAVE_REGS;
1573 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1575 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1576 mono_string_chars (name));
1578 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1586 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1590 MONO_ARCH_SAVE_REGS;
1592 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1597 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1601 MONO_ARCH_SAVE_REGS;
1603 *error = ERROR_SUCCESS;
1605 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1607 *error = GetLastError ();
1613 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1617 MONO_ARCH_SAVE_REGS;
1622 event = CreateEvent (NULL, manual, initial, NULL);
1624 event = CreateEvent (NULL, manual, initial,
1625 mono_string_chars (name));
1627 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1635 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1636 MONO_ARCH_SAVE_REGS;
1638 return (SetEvent(handle));
1641 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1642 MONO_ARCH_SAVE_REGS;
1644 return (ResetEvent(handle));
1648 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1649 MONO_ARCH_SAVE_REGS;
1651 CloseHandle (handle);
1654 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1660 MONO_ARCH_SAVE_REGS;
1662 *error = ERROR_SUCCESS;
1664 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1666 *error = GetLastError ();
1672 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1674 MONO_ARCH_SAVE_REGS;
1676 return InterlockedIncrement (location);
1679 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1683 MONO_ARCH_SAVE_REGS;
1685 mono_interlocked_lock ();
1689 mono_interlocked_unlock ();
1695 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1697 MONO_ARCH_SAVE_REGS;
1699 return InterlockedDecrement(location);
1702 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1706 MONO_ARCH_SAVE_REGS;
1708 mono_interlocked_lock ();
1712 mono_interlocked_unlock ();
1717 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1719 MONO_ARCH_SAVE_REGS;
1721 return InterlockedExchange(location, value);
1724 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1727 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1728 mono_gc_wbarrier_generic_nostore (location);
1732 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1734 return InterlockedExchangePointer(location, value);
1737 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1739 IntFloatUnion val, ret;
1741 MONO_ARCH_SAVE_REGS;
1744 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1750 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1752 #if SIZEOF_VOID_P == 8
1753 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1758 * According to MSDN, this function is only atomic with regards to the
1759 * other Interlocked functions on 32 bit platforms.
1761 mono_interlocked_lock ();
1764 mono_interlocked_unlock ();
1771 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1773 #if SIZEOF_VOID_P == 8
1774 LongDoubleUnion val, ret;
1777 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1784 * According to MSDN, this function is only atomic with regards to the
1785 * other Interlocked functions on 32 bit platforms.
1787 mono_interlocked_lock ();
1790 mono_interlocked_unlock ();
1796 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1798 MONO_ARCH_SAVE_REGS;
1800 return InterlockedCompareExchange(location, value, comparand);
1803 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1806 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1807 mono_gc_wbarrier_generic_nostore (location);
1811 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1813 return InterlockedCompareExchangePointer(location, value, comparand);
1816 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1818 IntFloatUnion val, ret, cmp;
1820 MONO_ARCH_SAVE_REGS;
1823 cmp.fval = comparand;
1824 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1830 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1832 #if SIZEOF_VOID_P == 8
1833 LongDoubleUnion val, comp, ret;
1836 comp.fval = comparand;
1837 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1843 mono_interlocked_lock ();
1845 if (old == comparand)
1847 mono_interlocked_unlock ();
1854 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1856 #if SIZEOF_VOID_P == 8
1857 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1861 mono_interlocked_lock ();
1863 if (old == comparand)
1865 mono_interlocked_unlock ();
1872 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1875 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1876 mono_gc_wbarrier_generic_nostore (location);
1881 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1884 res = InterlockedExchangePointer ((gpointer *)location, value);
1885 mono_gc_wbarrier_generic_nostore (location);
1890 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1892 #if SIZEOF_VOID_P == 8
1893 /* Should be implemented as a JIT intrinsic */
1894 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1899 mono_interlocked_lock ();
1901 *location = orig + value;
1902 mono_interlocked_unlock ();
1904 return orig + value;
1909 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1911 #if SIZEOF_VOID_P == 8
1912 /* Should be implemented as a JIT intrinsic */
1913 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1918 mono_interlocked_lock ();
1920 *location = orig + value;
1921 mono_interlocked_unlock ();
1923 return orig + value;
1928 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1930 #if SIZEOF_VOID_P == 8
1931 /* 64 bit reads are already atomic */
1936 mono_interlocked_lock ();
1938 mono_interlocked_unlock ();
1945 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1947 mono_threads_lock ();
1948 mono_threads_unlock ();
1952 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1954 mono_thread_clr_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_SetState (MonoInternalThread* this, guint32 state)
1968 mono_thread_set_state (this, state);
1970 if (state & ThreadState_Background) {
1971 /* If the thread changes the background mode, the main thread has to
1972 * be notified, since it has to rebuild the list of threads to
1975 SetEvent (background_change_event);
1980 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1984 ensure_synch_cs_set (this);
1986 EnterCriticalSection (this->synch_cs);
1988 state = this->state;
1990 LeaveCriticalSection (this->synch_cs);
1995 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1997 MonoInternalThread *current;
2000 ensure_synch_cs_set (this);
2002 current = mono_thread_internal_current ();
2004 EnterCriticalSection (this->synch_cs);
2006 this->thread_interrupt_requested = TRUE;
2007 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2009 LeaveCriticalSection (this->synch_cs);
2012 abort_thread_internal (this, TRUE, FALSE);
2016 void mono_thread_current_check_pending_interrupt ()
2018 MonoInternalThread *thread = mono_thread_internal_current ();
2019 gboolean throw = FALSE;
2021 mono_debugger_check_interruption ();
2023 ensure_synch_cs_set (thread);
2025 EnterCriticalSection (thread->synch_cs);
2027 if (thread->thread_interrupt_requested) {
2029 thread->thread_interrupt_requested = FALSE;
2032 LeaveCriticalSection (thread->synch_cs);
2035 mono_raise_exception (mono_get_exception_thread_interrupted ());
2040 mono_thread_get_abort_signal (void)
2052 static int abort_signum = -1;
2054 if (abort_signum != -1)
2055 return abort_signum;
2056 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2057 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2058 struct sigaction sinfo;
2059 sigaction (i, NULL, &sinfo);
2060 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2065 /* fallback to the old way */
2068 #endif /* HOST_WIN32 */
2072 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2074 MonoException* exc = mono_thread_request_interruption (FALSE);
2075 if (exc) mono_raise_exception (exc);
2077 #endif /* HOST_WIN32 */
2080 * signal_thread_state_change
2082 * Tells the thread that his state has changed and it has to enter the new
2083 * state as soon as possible.
2085 static void signal_thread_state_change (MonoInternalThread *thread)
2087 if (thread == mono_thread_internal_current ()) {
2088 /* Do it synchronously */
2089 MonoException *exc = mono_thread_request_interruption (FALSE);
2091 mono_raise_exception (exc);
2095 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2097 /* fixme: store the state somewhere */
2098 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2101 * This will cause waits to be broken.
2102 * It will also prevent the thread from entering a wait, so if the thread returns
2103 * from the wait before it receives the abort signal, it will just spin in the wait
2104 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2107 wapi_interrupt_thread (thread->handle);
2108 #endif /* HOST_WIN32 */
2112 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2114 ensure_synch_cs_set (thread);
2116 EnterCriticalSection (thread->synch_cs);
2118 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2119 (thread->state & ThreadState_StopRequested) != 0 ||
2120 (thread->state & ThreadState_Stopped) != 0)
2122 LeaveCriticalSection (thread->synch_cs);
2126 if ((thread->state & ThreadState_Unstarted) != 0) {
2127 thread->state |= ThreadState_Aborted;
2128 LeaveCriticalSection (thread->synch_cs);
2132 thread->state |= ThreadState_AbortRequested;
2133 if (thread->abort_state_handle)
2134 mono_gchandle_free (thread->abort_state_handle);
2136 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2137 g_assert (thread->abort_state_handle);
2139 thread->abort_state_handle = 0;
2141 thread->abort_exc = NULL;
2144 * abort_exc is set in mono_thread_execute_interruption(),
2145 * triggered by the call to signal_thread_state_change(),
2146 * below. There's a point between where we have
2147 * abort_state_handle set, but abort_exc NULL, but that's not
2151 LeaveCriticalSection (thread->synch_cs);
2153 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2155 /* During shutdown, we can't wait for other threads */
2157 /* Make sure the thread is awake */
2158 mono_thread_resume (thread);
2160 abort_thread_internal (thread, TRUE, TRUE);
2164 ves_icall_System_Threading_Thread_ResetAbort (void)
2166 MonoInternalThread *thread = mono_thread_internal_current ();
2167 gboolean was_aborting;
2169 ensure_synch_cs_set (thread);
2171 EnterCriticalSection (thread->synch_cs);
2172 was_aborting = thread->state & ThreadState_AbortRequested;
2173 thread->state &= ~ThreadState_AbortRequested;
2174 LeaveCriticalSection (thread->synch_cs);
2176 if (!was_aborting) {
2177 const char *msg = "Unable to reset abort because no abort was requested";
2178 mono_raise_exception (mono_get_exception_thread_state (msg));
2180 thread->abort_exc = NULL;
2181 if (thread->abort_state_handle) {
2182 mono_gchandle_free (thread->abort_state_handle);
2183 /* This is actually not necessary - the handle
2184 only counts if the exception is set */
2185 thread->abort_state_handle = 0;
2190 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2192 ensure_synch_cs_set (thread);
2194 EnterCriticalSection (thread->synch_cs);
2196 thread->state &= ~ThreadState_AbortRequested;
2198 if (thread->abort_exc) {
2199 thread->abort_exc = NULL;
2200 if (thread->abort_state_handle) {
2201 mono_gchandle_free (thread->abort_state_handle);
2202 /* This is actually not necessary - the handle
2203 only counts if the exception is set */
2204 thread->abort_state_handle = 0;
2208 LeaveCriticalSection (thread->synch_cs);
2212 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2214 MonoInternalThread *thread = this->internal_thread;
2215 MonoObject *state, *deserialized = NULL, *exc;
2218 if (!thread->abort_state_handle)
2221 state = mono_gchandle_get_target (thread->abort_state_handle);
2224 domain = mono_domain_get ();
2225 if (mono_object_domain (state) == domain)
2228 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2230 if (!deserialized) {
2231 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2233 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2234 mono_raise_exception (invalid_op_exc);
2237 return deserialized;
2241 mono_thread_suspend (MonoInternalThread *thread)
2243 ensure_synch_cs_set (thread);
2245 EnterCriticalSection (thread->synch_cs);
2247 if ((thread->state & ThreadState_Unstarted) != 0 ||
2248 (thread->state & ThreadState_Aborted) != 0 ||
2249 (thread->state & ThreadState_Stopped) != 0)
2251 LeaveCriticalSection (thread->synch_cs);
2255 if ((thread->state & ThreadState_Suspended) != 0 ||
2256 (thread->state & ThreadState_SuspendRequested) != 0 ||
2257 (thread->state & ThreadState_StopRequested) != 0)
2259 LeaveCriticalSection (thread->synch_cs);
2263 thread->state |= ThreadState_SuspendRequested;
2265 LeaveCriticalSection (thread->synch_cs);
2267 suspend_thread_internal (thread, FALSE);
2272 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2274 if (!mono_thread_suspend (thread))
2275 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2279 mono_thread_resume (MonoInternalThread *thread)
2281 ensure_synch_cs_set (thread);
2283 EnterCriticalSection (thread->synch_cs);
2285 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2286 thread->state &= ~ThreadState_SuspendRequested;
2287 LeaveCriticalSection (thread->synch_cs);
2291 if ((thread->state & ThreadState_Suspended) == 0 ||
2292 (thread->state & ThreadState_Unstarted) != 0 ||
2293 (thread->state & ThreadState_Aborted) != 0 ||
2294 (thread->state & ThreadState_Stopped) != 0)
2296 LeaveCriticalSection (thread->synch_cs);
2300 return resume_thread_internal (thread);
2304 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2306 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2307 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2311 mono_threads_is_critical_method (MonoMethod *method)
2313 switch (method->wrapper_type) {
2314 case MONO_WRAPPER_RUNTIME_INVOKE:
2315 case MONO_WRAPPER_XDOMAIN_INVOKE:
2316 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2323 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2328 if (mono_threads_is_critical_method (m)) {
2329 *((gboolean*)data) = TRUE;
2336 is_running_protected_wrapper (void)
2338 gboolean found = FALSE;
2339 mono_stack_walk (find_wrapper, &found);
2343 void mono_thread_internal_stop (MonoInternalThread *thread)
2345 ensure_synch_cs_set (thread);
2347 EnterCriticalSection (thread->synch_cs);
2349 if ((thread->state & ThreadState_StopRequested) != 0 ||
2350 (thread->state & ThreadState_Stopped) != 0)
2352 LeaveCriticalSection (thread->synch_cs);
2356 /* Make sure the thread is awake */
2357 mono_thread_resume (thread);
2359 thread->state |= ThreadState_StopRequested;
2360 thread->state &= ~ThreadState_AbortRequested;
2362 LeaveCriticalSection (thread->synch_cs);
2364 abort_thread_internal (thread, TRUE, TRUE);
2367 void mono_thread_stop (MonoThread *thread)
2369 mono_thread_internal_stop (thread->internal_thread);
2373 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2375 return *((volatile gint8 *) (ptr));
2379 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2381 return *((volatile gint16 *) (ptr));
2385 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2387 return *((volatile gint32 *) (ptr));
2391 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2393 return *((volatile gint64 *) (ptr));
2397 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2399 return (void *) *((volatile void **) ptr);
2403 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2405 return *((volatile double *) (ptr));
2409 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2411 return *((volatile float *) (ptr));
2415 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2417 *((volatile gint8 *) ptr) = value;
2421 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2423 *((volatile gint16 *) ptr) = value;
2427 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2429 *((volatile gint32 *) ptr) = value;
2433 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2435 *((volatile gint64 *) ptr) = value;
2439 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2441 *((volatile void **) ptr) = value;
2445 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2447 mono_gc_wbarrier_generic_store (ptr, value);
2451 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2453 *((volatile double *) ptr) = value;
2457 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2459 *((volatile float *) ptr) = value;
2462 void mono_thread_init (MonoThreadStartCB start_cb,
2463 MonoThreadAttachCB attach_cb)
2465 InitializeCriticalSection(&threads_mutex);
2466 InitializeCriticalSection(&interlocked_mutex);
2467 InitializeCriticalSection(&contexts_mutex);
2469 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2470 g_assert(background_change_event != NULL);
2472 mono_init_static_data_info (&thread_static_info);
2473 mono_init_static_data_info (&context_static_info);
2475 MONO_FAST_TLS_INIT (tls_current_object);
2476 mono_native_tls_alloc (¤t_object_key, NULL);
2477 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2479 mono_thread_start_cb = start_cb;
2480 mono_thread_attach_cb = attach_cb;
2482 /* Get a pseudo handle to the current process. This is just a
2483 * kludge so that wapi can build a process handle if needed.
2484 * As a pseudo handle is returned, we don't need to clean
2487 GetCurrentProcess ();
2490 void mono_thread_cleanup (void)
2492 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2493 /* The main thread must abandon any held mutexes (particularly
2494 * important for named mutexes as they are shared across
2495 * processes, see bug 74680.) This will happen when the
2496 * thread exits, but if it's not running in a subthread it
2497 * won't exit in time.
2499 /* Using non-w32 API is a nasty kludge, but I couldn't find
2500 * anything in the documentation that would let me do this
2501 * here yet still be safe to call on windows.
2503 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2507 /* This stuff needs more testing, it seems one of these
2508 * critical sections can be locked when mono_thread_cleanup is
2511 DeleteCriticalSection (&threads_mutex);
2512 DeleteCriticalSection (&interlocked_mutex);
2513 DeleteCriticalSection (&contexts_mutex);
2514 DeleteCriticalSection (&delayed_free_table_mutex);
2515 DeleteCriticalSection (&small_id_mutex);
2516 CloseHandle (background_change_event);
2519 mono_native_tls_free (current_object_key);
2523 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2525 mono_thread_cleanup_fn = func;
2529 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2531 thread->internal_thread->manage_callback = func;
2534 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2536 mono_thread_notify_pending_exc_fn = func;
2540 static void print_tids (gpointer key, gpointer value, gpointer user)
2542 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2543 * sizeof(uint) and a cast to uint would overflow
2545 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2546 * print this as a pointer.
2548 g_message ("Waiting for: %p", key);
2553 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2554 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2558 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2562 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2564 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2566 if(ret==WAIT_FAILED) {
2567 /* See the comment in build_wait_tids() */
2568 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2572 for(i=0; i<wait->num; i++)
2573 CloseHandle (wait->handles[i]);
2575 if (ret == WAIT_TIMEOUT)
2578 for(i=0; i<wait->num; i++) {
2579 gsize tid = wait->threads[i]->tid;
2581 mono_threads_lock ();
2582 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2583 /* This thread must have been killed, because
2584 * it hasn't cleaned itself up. (It's just
2585 * possible that the thread exited before the
2586 * parent thread had a chance to store the
2587 * handle, and now there is another pointer to
2588 * the already-exited thread stored. In this
2589 * case, we'll just get two
2590 * mono_profiler_thread_end() calls for the
2594 mono_threads_unlock ();
2595 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2596 thread_cleanup (wait->threads[i]);
2598 mono_threads_unlock ();
2603 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2605 guint32 i, ret, count;
2607 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2609 /* Add the thread state change event, so it wakes up if a thread changes
2610 * to background mode.
2613 if (count < MAXIMUM_WAIT_OBJECTS) {
2614 wait->handles [count] = background_change_event;
2618 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2620 if(ret==WAIT_FAILED) {
2621 /* See the comment in build_wait_tids() */
2622 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2626 for(i=0; i<wait->num; i++)
2627 CloseHandle (wait->handles[i]);
2629 if (ret == WAIT_TIMEOUT)
2632 if (ret < wait->num) {
2633 gsize tid = wait->threads[ret]->tid;
2634 mono_threads_lock ();
2635 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2636 /* See comment in wait_for_tids about thread cleanup */
2637 mono_threads_unlock ();
2638 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2639 thread_cleanup (wait->threads [ret]);
2641 mono_threads_unlock ();
2645 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2647 struct wait_data *wait=(struct wait_data *)user;
2649 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2651 MonoInternalThread *thread=(MonoInternalThread *)value;
2653 /* Ignore background threads, we abort them later */
2654 /* Do not lock here since it is not needed and the caller holds threads_lock */
2655 if (thread->state & ThreadState_Background) {
2656 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2657 return; /* just leave, ignore */
2660 if (mono_gc_is_finalizer_internal_thread (thread)) {
2661 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2665 if (thread == mono_thread_internal_current ()) {
2666 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2670 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2671 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2675 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2676 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2680 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2681 if (handle == NULL) {
2682 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2686 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2687 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2688 wait->handles[wait->num]=handle;
2689 wait->threads[wait->num]=thread;
2692 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2694 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2699 /* Just ignore the rest, we can't do anything with
2706 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2708 struct wait_data *wait=(struct wait_data *)user;
2709 gsize self = GetCurrentThreadId ();
2710 MonoInternalThread *thread = value;
2713 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2716 /* The finalizer thread is not a background thread */
2717 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2718 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2720 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2724 /* printf ("A: %d\n", wait->num); */
2725 wait->handles[wait->num]=thread->handle;
2726 wait->threads[wait->num]=thread;
2729 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2730 mono_thread_internal_stop (thread);
2734 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2738 * mono_threads_set_shutting_down:
2740 * Is called by a thread that wants to shut down Mono. If the runtime is already
2741 * shutting down, the calling thread is suspended/stopped, and this function never
2745 mono_threads_set_shutting_down (void)
2747 MonoInternalThread *current_thread = mono_thread_internal_current ();
2749 mono_threads_lock ();
2751 if (shutting_down) {
2752 mono_threads_unlock ();
2754 /* Make sure we're properly suspended/stopped */
2756 EnterCriticalSection (current_thread->synch_cs);
2758 if ((current_thread->state & ThreadState_SuspendRequested) ||
2759 (current_thread->state & ThreadState_AbortRequested) ||
2760 (current_thread->state & ThreadState_StopRequested)) {
2761 LeaveCriticalSection (current_thread->synch_cs);
2762 mono_thread_execute_interruption (current_thread);
2764 current_thread->state |= ThreadState_Stopped;
2765 LeaveCriticalSection (current_thread->synch_cs);
2768 /*since we're killing the thread, unset the current domain.*/
2769 mono_domain_unset ();
2771 /* Wake up other threads potentially waiting for us */
2774 shutting_down = TRUE;
2776 /* Not really a background state change, but this will
2777 * interrupt the main thread if it is waiting for all
2778 * the other threads.
2780 SetEvent (background_change_event);
2782 mono_threads_unlock ();
2787 * mono_threads_is_shutting_down:
2789 * Returns whether a thread has commenced shutdown of Mono. Note that
2790 * if the function returns FALSE the caller must not assume that
2791 * shutdown is not in progress, because the situation might have
2792 * changed since the function returned. For that reason this function
2793 * is of very limited utility.
2796 mono_threads_is_shutting_down (void)
2798 return shutting_down;
2801 void mono_thread_manage (void)
2803 struct wait_data wait_data;
2804 struct wait_data *wait = &wait_data;
2806 memset (wait, 0, sizeof (struct wait_data));
2807 /* join each thread that's still running */
2808 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2810 mono_threads_lock ();
2812 THREAD_DEBUG (g_message("%s: No threads", __func__));
2813 mono_threads_unlock ();
2816 mono_threads_unlock ();
2819 mono_threads_lock ();
2820 if (shutting_down) {
2821 /* somebody else is shutting down */
2822 mono_threads_unlock ();
2825 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2826 mono_g_hash_table_foreach (threads, print_tids, NULL));
2828 ResetEvent (background_change_event);
2830 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2831 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2832 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2833 mono_threads_unlock ();
2835 /* Something to wait for */
2836 wait_for_tids_or_state_change (wait, INFINITE);
2838 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2839 } while(wait->num>0);
2841 mono_threads_set_shutting_down ();
2843 /* No new threads will be created after this point */
2845 mono_runtime_set_shutting_down ();
2847 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2848 mono_thread_pool_cleanup ();
2851 * Remove everything but the finalizer thread and self.
2852 * Also abort all the background threads
2855 mono_threads_lock ();
2858 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2859 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2860 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2862 mono_threads_unlock ();
2864 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2866 /* Something to wait for */
2867 wait_for_tids (wait, INFINITE);
2869 } while (wait->num > 0);
2872 * give the subthreads a chance to really quit (this is mainly needed
2873 * to get correct user and system times from getrusage/wait/time(1)).
2874 * This could be removed if we avoid pthread_detach() and use pthread_join().
2881 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2883 MonoInternalThread *thread=(MonoInternalThread *)value;
2885 if(thread->tid != (gsize)user) {
2886 /*TerminateThread (thread->handle, -1);*/
2890 void mono_thread_abort_all_other_threads (void)
2892 gsize self = GetCurrentThreadId ();
2894 mono_threads_lock ();
2895 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2896 mono_g_hash_table_size (threads));
2897 mono_g_hash_table_foreach (threads, print_tids, NULL));
2899 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2901 mono_threads_unlock ();
2905 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2907 MonoInternalThread *thread = (MonoInternalThread*)value;
2908 struct wait_data *wait = (struct wait_data*)user_data;
2912 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2914 * This needs no locking.
2916 if ((thread->state & ThreadState_Suspended) != 0 ||
2917 (thread->state & ThreadState_Stopped) != 0)
2920 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2921 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2925 wait->handles [wait->num] = handle;
2926 wait->threads [wait->num] = thread;
2932 * mono_thread_suspend_all_other_threads:
2934 * Suspend all managed threads except the finalizer thread and this thread. It is
2935 * not possible to resume them later.
2937 void mono_thread_suspend_all_other_threads (void)
2939 struct wait_data wait_data;
2940 struct wait_data *wait = &wait_data;
2942 gsize self = GetCurrentThreadId ();
2944 guint32 eventidx = 0;
2945 gboolean starting, finished;
2947 memset (wait, 0, sizeof (struct wait_data));
2949 * The other threads could be in an arbitrary state at this point, i.e.
2950 * they could be starting up, shutting down etc. This means that there could be
2951 * threads which are not even in the threads hash table yet.
2955 * First we set a barrier which will be checked by all threads before they
2956 * are added to the threads hash table, and they will exit if the flag is set.
2957 * This ensures that no threads could be added to the hash later.
2958 * We will use shutting_down as the barrier for now.
2960 g_assert (shutting_down);
2963 * We make multiple calls to WaitForMultipleObjects since:
2964 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
2965 * - some threads could exit without becoming suspended
2970 * Make a copy of the hashtable since we can't do anything with
2971 * threads while threads_mutex is held.
2974 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2975 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2976 mono_threads_lock ();
2977 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
2978 mono_threads_unlock ();
2980 events = g_new0 (gpointer, wait->num);
2982 /* Get the suspended events that we'll be waiting for */
2983 for (i = 0; i < wait->num; ++i) {
2984 MonoInternalThread *thread = wait->threads [i];
2985 gboolean signal_suspend = FALSE;
2987 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2988 //CloseHandle (wait->handles [i]);
2989 wait->threads [i] = NULL; /* ignore this thread in next loop */
2993 ensure_synch_cs_set (thread);
2995 EnterCriticalSection (thread->synch_cs);
2997 if (thread->suspended_event == NULL) {
2998 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2999 if (thread->suspended_event == NULL) {
3000 /* Forget this one and go on to the next */
3001 LeaveCriticalSection (thread->synch_cs);
3006 if ((thread->state & ThreadState_Suspended) != 0 ||
3007 (thread->state & ThreadState_StopRequested) != 0 ||
3008 (thread->state & ThreadState_Stopped) != 0) {
3009 LeaveCriticalSection (thread->synch_cs);
3010 CloseHandle (wait->handles [i]);
3011 wait->threads [i] = NULL; /* ignore this thread in next loop */
3015 if ((thread->state & ThreadState_SuspendRequested) == 0)
3016 signal_suspend = TRUE;
3018 events [eventidx++] = thread->suspended_event;
3020 /* Convert abort requests into suspend requests */
3021 if ((thread->state & ThreadState_AbortRequested) != 0)
3022 thread->state &= ~ThreadState_AbortRequested;
3024 thread->state |= ThreadState_SuspendRequested;
3026 LeaveCriticalSection (thread->synch_cs);
3028 /* Signal the thread to suspend */
3029 if (mono_thread_info_new_interrupt_enabled ())
3030 suspend_thread_internal (thread, TRUE);
3031 else if (signal_suspend)
3032 signal_thread_state_change (thread);
3035 /*Only wait on the suspend event if we are using the old path */
3036 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3037 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3038 for (i = 0; i < wait->num; ++i) {
3039 MonoInternalThread *thread = wait->threads [i];
3044 ensure_synch_cs_set (thread);
3046 EnterCriticalSection (thread->synch_cs);
3047 if ((thread->state & ThreadState_Suspended) != 0) {
3048 CloseHandle (thread->suspended_event);
3049 thread->suspended_event = NULL;
3051 LeaveCriticalSection (thread->synch_cs);
3055 if (eventidx <= 0) {
3057 * If there are threads which are starting up, we wait until they
3058 * are suspended when they try to register in the threads hash.
3059 * This is guaranteed to finish, since the threads which can create new
3060 * threads get suspended after a while.
3061 * FIXME: The finalizer thread can still create new threads.
3063 mono_threads_lock ();
3064 if (threads_starting_up)
3065 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3068 mono_threads_unlock ();
3080 collect_threads (gpointer key, gpointer value, gpointer user_data)
3082 MonoInternalThread *thread = (MonoInternalThread*)value;
3083 struct wait_data *wait = (struct wait_data*)user_data;
3086 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3087 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3091 wait->handles [wait->num] = handle;
3092 wait->threads [wait->num] = thread;
3097 static gboolean thread_dump_requested;
3099 static G_GNUC_UNUSED gboolean
3100 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3102 GString *p = (GString*)data;
3103 MonoMethod *method = NULL;
3105 method = frame->ji->method;
3108 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3109 g_string_append_printf (p, " %s\n", location);
3112 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3118 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3120 GString* text = g_string_new (0);
3122 GError *error = NULL;
3125 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3127 g_string_append_printf (text, "\n\"%s\"", name);
3130 else if (thread->threadpool_thread)
3131 g_string_append (text, "\n\"<threadpool thread>\"");
3133 g_string_append (text, "\n\"<unnamed thread>\"");
3136 /* This no longer works with remote unwinding */
3138 wapi_desc = wapi_current_thread_desc ();
3139 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3144 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3145 mono_thread_info_resume (mono_thread_info_get_tid (info));
3147 fprintf (stdout, "%s", text->str);
3149 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3150 OutputDebugStringA(text->str);
3153 g_string_free (text, TRUE);
3158 dump_thread (gpointer key, gpointer value, gpointer user)
3160 MonoInternalThread *thread = (MonoInternalThread *)value;
3161 MonoThreadInfo *info;
3163 if (thread == mono_thread_internal_current ())
3167 FIXME This still can hang if we stop a thread during malloc.
3168 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3169 that takes a callback and runs it with the target suspended.
3170 We probably should loop a bit around trying to get it to either managed code
3173 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3178 print_thread_dump (thread, info);
3182 mono_threads_perform_thread_dump (void)
3184 if (!thread_dump_requested)
3187 printf ("Full thread dump:\n");
3190 * Make a copy of the hashtable since we can't do anything with
3191 * threads while threads_mutex is held.
3193 mono_threads_lock ();
3194 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3195 mono_threads_unlock ();
3197 thread_dump_requested = FALSE;
3201 * mono_threads_request_thread_dump:
3203 * Ask all threads except the current to print their stacktrace to stdout.
3206 mono_threads_request_thread_dump (void)
3208 struct wait_data wait_data;
3209 struct wait_data *wait = &wait_data;
3212 /*The new thread dump code runs out of the finalizer thread. */
3213 if (mono_thread_info_new_interrupt_enabled ()) {
3214 thread_dump_requested = TRUE;
3215 mono_gc_finalize_notify ();
3220 memset (wait, 0, sizeof (struct wait_data));
3223 * Make a copy of the hashtable since we can't do anything with
3224 * threads while threads_mutex is held.
3226 mono_threads_lock ();
3227 mono_g_hash_table_foreach (threads, collect_threads, wait);
3228 mono_threads_unlock ();
3230 for (i = 0; i < wait->num; ++i) {
3231 MonoInternalThread *thread = wait->threads [i];
3233 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3234 (thread != mono_thread_internal_current ()) &&
3235 !thread->thread_dump_requested) {
3236 thread->thread_dump_requested = TRUE;
3238 signal_thread_state_change (thread);
3241 CloseHandle (wait->handles [i]);
3247 gint allocated; /* +1 so that refs [allocated] == NULL */
3251 typedef struct ref_stack RefStack;
3254 ref_stack_new (gint initial_size)
3258 initial_size = MAX (initial_size, 16) + 1;
3259 rs = g_new0 (RefStack, 1);
3260 rs->refs = g_new0 (gpointer, initial_size);
3261 rs->allocated = initial_size;
3266 ref_stack_destroy (gpointer ptr)
3277 ref_stack_push (RefStack *rs, gpointer ptr)
3279 g_assert (rs != NULL);
3281 if (rs->bottom >= rs->allocated) {
3282 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3283 rs->allocated <<= 1;
3284 rs->refs [rs->allocated] = NULL;
3286 rs->refs [rs->bottom++] = ptr;
3290 ref_stack_pop (RefStack *rs)
3292 if (rs == NULL || rs->bottom == 0)
3296 rs->refs [rs->bottom] = NULL;
3300 ref_stack_find (RefStack *rs, gpointer ptr)
3307 for (refs = rs->refs; refs && *refs; refs++) {
3315 * mono_thread_push_appdomain_ref:
3317 * Register that the current thread may have references to objects in domain
3318 * @domain on its stack. Each call to this function should be paired with a
3319 * call to pop_appdomain_ref.
3322 mono_thread_push_appdomain_ref (MonoDomain *domain)
3324 MonoInternalThread *thread = mono_thread_internal_current ();
3327 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3328 SPIN_LOCK (thread->lock_thread_id);
3329 if (thread->appdomain_refs == NULL)
3330 thread->appdomain_refs = ref_stack_new (16);
3331 ref_stack_push (thread->appdomain_refs, domain);
3332 SPIN_UNLOCK (thread->lock_thread_id);
3337 mono_thread_pop_appdomain_ref (void)
3339 MonoInternalThread *thread = mono_thread_internal_current ();
3342 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3343 SPIN_LOCK (thread->lock_thread_id);
3344 ref_stack_pop (thread->appdomain_refs);
3345 SPIN_UNLOCK (thread->lock_thread_id);
3350 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3353 SPIN_LOCK (thread->lock_thread_id);
3354 res = ref_stack_find (thread->appdomain_refs, domain);
3355 SPIN_UNLOCK (thread->lock_thread_id);
3360 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3362 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3365 typedef struct abort_appdomain_data {
3366 struct wait_data wait;
3368 } abort_appdomain_data;
3371 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3373 MonoInternalThread *thread = (MonoInternalThread*)value;
3374 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3375 MonoDomain *domain = data->domain;
3377 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3378 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3380 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3381 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3384 data->wait.handles [data->wait.num] = handle;
3385 data->wait.threads [data->wait.num] = thread;
3388 /* Just ignore the rest, we can't do anything with
3396 * mono_threads_abort_appdomain_threads:
3398 * Abort threads which has references to the given appdomain.
3401 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3403 abort_appdomain_data user_data;
3405 int orig_timeout = timeout;
3408 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3410 start_time = mono_msec_ticks ();
3412 mono_threads_lock ();
3414 user_data.domain = domain;
3415 user_data.wait.num = 0;
3416 /* This shouldn't take any locks */
3417 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3418 mono_threads_unlock ();
3420 if (user_data.wait.num > 0) {
3421 /* Abort the threads outside the threads lock */
3422 for (i = 0; i < user_data.wait.num; ++i)
3423 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3426 * We should wait for the threads either to abort, or to leave the
3427 * domain. We can't do the latter, so we wait with a timeout.
3429 wait_for_tids (&user_data.wait, 100);
3432 /* Update remaining time */
3433 timeout -= mono_msec_ticks () - start_time;
3434 start_time = mono_msec_ticks ();
3436 if (orig_timeout != -1 && timeout < 0)
3439 while (user_data.wait.num > 0);
3441 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3447 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3449 MonoInternalThread *thread = (MonoInternalThread*)value;
3450 MonoDomain *domain = (MonoDomain*)user_data;
3453 /* No locking needed here */
3454 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3456 if (thread->cached_culture_info) {
3457 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3458 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3459 if (obj && obj->vtable->domain == domain)
3460 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3466 * mono_threads_clear_cached_culture:
3468 * Clear the cached_current_culture from all threads if it is in the
3472 mono_threads_clear_cached_culture (MonoDomain *domain)
3474 mono_threads_lock ();
3475 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3476 mono_threads_unlock ();
3480 * mono_thread_get_undeniable_exception:
3482 * Return an exception which needs to be raised when leaving a catch clause.
3483 * This is used for undeniable exception propagation.
3486 mono_thread_get_undeniable_exception (void)
3488 MonoInternalThread *thread = mono_thread_internal_current ();
3490 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3492 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3493 * exception if the thread no longer references a dying appdomain.
3495 thread->abort_exc->trace_ips = NULL;
3496 thread->abort_exc->stack_trace = NULL;
3497 return thread->abort_exc;
3503 #if MONO_SMALL_CONFIG
3504 #define NUM_STATIC_DATA_IDX 4
3505 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3509 #define NUM_STATIC_DATA_IDX 8
3510 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3511 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3515 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3518 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3521 gpointer *static_data = addr;
3522 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3525 if (!static_data [i])
3527 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3528 ptr = static_data [i];
3529 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3530 uintptr_t bmap = static_reference_bitmaps [i][j];
3533 if ((bmap & 1) && *p) {
3544 * mono_alloc_static_data
3546 * Allocate memory blocks for storing threads or context static data
3549 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3551 guint idx = (offset >> 24) - 1;
3554 gpointer* static_data = *static_data_ptr;
3556 static void* tls_desc = NULL;
3557 if (mono_gc_user_markers_supported () && !tls_desc)
3558 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3559 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3560 *static_data_ptr = static_data;
3561 static_data [0] = static_data;
3564 for (i = 1; i <= idx; ++i) {
3565 if (static_data [i])
3567 if (mono_gc_user_markers_supported () && threadlocal)
3568 static_data [i] = g_malloc0 (static_data_size [i]);
3570 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3575 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3578 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3579 if (!static_data [i])
3581 if (mono_gc_user_markers_supported () && threadlocal)
3582 g_free (static_data [i]);
3584 mono_gc_free_fixed (static_data [i]);
3586 mono_gc_free_fixed (static_data);
3590 * mono_init_static_data_info
3592 * Initializes static data counters
3594 static void mono_init_static_data_info (StaticDataInfo *static_data)
3596 static_data->idx = 0;
3597 static_data->offset = 0;
3598 static_data->freelist = NULL;
3602 * mono_alloc_static_data_slot
3604 * Generates an offset for static data. static_data contains the counters
3605 * used to generate it.
3608 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3612 if (!static_data->idx && !static_data->offset) {
3614 * we use the first chunk of the first allocation also as
3615 * an array for the rest of the data
3617 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3619 static_data->offset += align - 1;
3620 static_data->offset &= ~(align - 1);
3621 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3622 static_data->idx ++;
3623 g_assert (size <= static_data_size [static_data->idx]);
3624 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3625 static_data->offset = 0;
3627 offset = static_data->offset | ((static_data->idx + 1) << 24);
3628 static_data->offset += size;
3633 * ensure thread static fields already allocated are valid for thread
3634 * This function is called when a thread is created or on thread attach.
3637 thread_adjust_static_data (MonoInternalThread *thread)
3641 mono_threads_lock ();
3642 if (thread_static_info.offset || thread_static_info.idx > 0) {
3643 /* get the current allocated size */
3644 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3645 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3647 mono_threads_unlock ();
3651 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3653 MonoInternalThread *thread = value;
3654 guint32 offset = GPOINTER_TO_UINT (user);
3656 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3659 static MonoThreadDomainTls*
3660 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3662 MonoThreadDomainTls* prev = NULL;
3663 MonoThreadDomainTls* tmp = static_data->freelist;
3665 if (tmp->size == size) {
3667 prev->next = tmp->next;
3669 static_data->freelist = tmp->next;
3678 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int max_set)
3681 int idx = (offset >> 24) - 1;
3683 if (!static_reference_bitmaps [idx])
3684 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3685 rb = static_reference_bitmaps [idx];
3687 offset /= sizeof (gpointer);
3688 /* offset is now the bitmap offset */
3689 for (i = 0; i < max_set; ++i) {
3690 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3691 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3696 clear_reference_bitmap (guint32 offset, guint32 size)
3698 int idx = (offset >> 24) - 1;
3700 rb = static_reference_bitmaps [idx];
3702 offset /= sizeof (gpointer);
3703 size /= sizeof (gpointer);
3705 /* offset is now the bitmap offset */
3706 for (; offset < size; ++offset)
3707 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3711 * The offset for a special static variable is composed of three parts:
3712 * a bit that indicates the type of static data (0:thread, 1:context),
3713 * an index in the array of chunks of memory for the thread (thread->static_data)
3714 * and an offset in that chunk of mem. This allows allocating less memory in the
3719 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int max_set)
3722 if (static_type == SPECIAL_STATIC_THREAD) {
3723 MonoThreadDomainTls *item;
3724 mono_threads_lock ();
3725 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3726 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3728 offset = item->offset;
3731 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3733 update_tls_reference_bitmap (offset, bitmap, max_set);
3734 /* This can be called during startup */
3735 if (threads != NULL)
3736 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3737 mono_threads_unlock ();
3739 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3740 mono_contexts_lock ();
3741 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3742 mono_contexts_unlock ();
3743 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3749 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3751 /* The high bit means either thread (0) or static (1) data. */
3753 guint32 static_type = (offset & 0x80000000);
3756 offset &= 0x7fffffff;
3757 idx = (offset >> 24) - 1;
3759 if (static_type == 0) {
3760 return get_thread_static_data (thread, offset);
3762 /* Allocate static data block under demand, since we don't have a list
3765 MonoAppContext *context = mono_context_get ();
3766 if (!context->static_data || !context->static_data [idx]) {
3767 mono_contexts_lock ();
3768 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3769 mono_contexts_unlock ();
3771 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3776 mono_get_special_static_data (guint32 offset)
3778 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3787 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3789 MonoInternalThread *thread = value;
3790 TlsOffsetSize *data = user;
3791 int idx = (data->offset >> 24) - 1;
3794 if (!thread->static_data || !thread->static_data [idx])
3796 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3797 mono_gc_bzero (ptr, data->size);
3801 do_free_special_slot (guint32 offset, guint32 size)
3803 guint32 static_type = (offset & 0x80000000);
3804 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3805 if (static_type == 0) {
3807 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3808 data.offset = offset & 0x7fffffff;
3810 clear_reference_bitmap (data.offset, data.size);
3811 if (threads != NULL)
3812 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3813 item->offset = offset;
3816 if (!mono_runtime_is_shutting_down ()) {
3817 item->next = thread_static_info.freelist;
3818 thread_static_info.freelist = item;
3820 /* We could be called during shutdown after mono_thread_cleanup () is called */
3824 /* FIXME: free context static data as well */
3829 do_free_special (gpointer key, gpointer value, gpointer data)
3831 MonoClassField *field = key;
3832 guint32 offset = GPOINTER_TO_UINT (value);
3835 size = mono_type_size (field->type, &align);
3836 do_free_special_slot (offset, size);
3840 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3842 mono_threads_lock ();
3843 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3844 mono_threads_unlock ();
3848 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3850 mono_threads_lock ();
3851 do_free_special_slot (offset, size);
3852 mono_threads_unlock ();
3856 * allocates room in the thread local area for storing an instance of the struct type
3857 * the allocation is kept track of in domain->tlsrec_list.
3860 mono_thread_alloc_tls (MonoReflectionType *type)
3862 MonoDomain *domain = mono_domain_get ();
3864 MonoTlsDataRecord *tlsrec;
3867 gsize default_bitmap [4] = {0};
3868 uint32_t tls_offset;
3872 klass = mono_class_from_mono_type (type->type);
3873 /* TlsDatum is a struct, so we subtract the object header size offset */
3874 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3875 size = mono_type_size (type->type, &align);
3876 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set);
3877 if (bitmap != default_bitmap)
3879 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3880 tlsrec->tls_offset = tls_offset;
3881 tlsrec->size = size;
3882 mono_domain_lock (domain);
3883 tlsrec->next = domain->tlsrec_list;
3884 domain->tlsrec_list = tlsrec;
3885 mono_domain_unlock (domain);
3890 mono_thread_destroy_tls (uint32_t tls_offset)
3892 MonoTlsDataRecord *prev = NULL;
3893 MonoTlsDataRecord *cur;
3895 MonoDomain *domain = mono_domain_get ();
3896 mono_domain_lock (domain);
3897 cur = domain->tlsrec_list;
3899 if (cur->tls_offset == tls_offset) {
3901 prev->next = cur->next;
3903 domain->tlsrec_list = cur->next;
3911 mono_domain_unlock (domain);
3913 mono_special_static_data_free_slot (tls_offset, size);
3917 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3920 mono_thread_destroy_domain_tls (MonoDomain *domain)
3922 while (domain->tlsrec_list)
3923 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3926 static MonoClassField *local_slots = NULL;
3929 /* local tls data to get locals_slot from a thread */
3932 /* index in the locals_slot array */
3937 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3939 LocalSlotID *sid = user_data;
3940 MonoInternalThread *thread = (MonoInternalThread*)value;
3941 MonoArray *slots_array;
3943 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3944 * it is for the right domain, so we need to check if it is allocated an initialized
3945 * for the current thread.
3947 /*g_print ("handling thread %p\n", thread);*/
3948 if (!thread->static_data || !thread->static_data [sid->idx])
3950 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3951 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3953 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3957 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3965 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3967 g_warning ("local_slots field not found in Thread class");
3971 domain = mono_domain_get ();
3972 mono_domain_lock (domain);
3973 if (domain->special_static_fields)
3974 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3975 mono_domain_unlock (domain);
3978 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3979 sid.offset = GPOINTER_TO_UINT (addr);
3980 sid.offset &= 0x7fffffff;
3981 sid.idx = (sid.offset >> 24) - 1;
3982 mono_threads_lock ();
3983 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3984 mono_threads_unlock ();
3986 /* FIXME: clear the slot for MonoAppContexts, too */
3991 static void CALLBACK dummy_apc (ULONG_PTR param)
3995 static guint32 dummy_apc (gpointer param)
4002 * mono_thread_execute_interruption
4004 * Performs the operation that the requested thread state requires (abort,
4007 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4009 ensure_synch_cs_set (thread);
4011 EnterCriticalSection (thread->synch_cs);
4013 /* MonoThread::interruption_requested can only be changed with atomics */
4014 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4015 /* this will consume pending APC calls */
4016 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4017 InterlockedDecrement (&thread_interruption_requested);
4019 /* Clear the interrupted flag of the thread so it can wait again */
4020 wapi_clear_interruption ();
4024 if ((thread->state & ThreadState_AbortRequested) != 0) {
4025 LeaveCriticalSection (thread->synch_cs);
4026 if (thread->abort_exc == NULL) {
4028 * This might be racy, but it has to be called outside the lock
4029 * since it calls managed code.
4031 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4033 return thread->abort_exc;
4035 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4036 self_suspend_internal (thread);
4039 else if ((thread->state & ThreadState_StopRequested) != 0) {
4040 /* FIXME: do this through the JIT? */
4042 LeaveCriticalSection (thread->synch_cs);
4044 mono_thread_exit ();
4046 } else if (thread->pending_exception) {
4049 exc = thread->pending_exception;
4050 thread->pending_exception = NULL;
4052 LeaveCriticalSection (thread->synch_cs);
4054 } else if (thread->thread_interrupt_requested) {
4056 thread->thread_interrupt_requested = FALSE;
4057 LeaveCriticalSection (thread->synch_cs);
4059 return(mono_get_exception_thread_interrupted ());
4062 LeaveCriticalSection (thread->synch_cs);
4068 * mono_thread_request_interruption
4070 * A signal handler can call this method to request the interruption of a
4071 * thread. The result of the interruption will depend on the current state of
4072 * the thread. If the result is an exception that needs to be throw, it is
4073 * provided as return value.
4076 mono_thread_request_interruption (gboolean running_managed)
4078 MonoInternalThread *thread = mono_thread_internal_current ();
4080 /* The thread may already be stopping */
4085 if (thread->interrupt_on_stop &&
4086 thread->state & ThreadState_StopRequested &&
4087 thread->state & ThreadState_Background)
4091 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4094 if (!running_managed || is_running_protected_wrapper ()) {
4095 /* Can't stop while in unmanaged code. Increase the global interruption
4096 request count. When exiting the unmanaged method the count will be
4097 checked and the thread will be interrupted. */
4099 InterlockedIncrement (&thread_interruption_requested);
4101 if (mono_thread_notify_pending_exc_fn && !running_managed)
4102 /* The JIT will notify the thread about the interruption */
4103 /* This shouldn't take any locks */
4104 mono_thread_notify_pending_exc_fn ();
4106 /* this will awake the thread if it is in WaitForSingleObject
4108 /* Our implementation of this function ignores the func argument */
4109 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4113 return mono_thread_execute_interruption (thread);
4117 /*This function should be called by a thread after it has exited all of
4118 * its handle blocks at interruption time.*/
4120 mono_thread_resume_interruption (void)
4122 MonoInternalThread *thread = mono_thread_internal_current ();
4123 gboolean still_aborting;
4125 /* The thread may already be stopping */
4129 ensure_synch_cs_set (thread);
4130 EnterCriticalSection (thread->synch_cs);
4131 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4132 LeaveCriticalSection (thread->synch_cs);
4134 /*This can happen if the protected block called Thread::ResetAbort*/
4135 if (!still_aborting)
4138 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4140 InterlockedIncrement (&thread_interruption_requested);
4143 wapi_self_interrupt ();
4145 return mono_thread_execute_interruption (thread);
4148 gboolean mono_thread_interruption_requested ()
4150 if (thread_interruption_requested) {
4151 MonoInternalThread *thread = mono_thread_internal_current ();
4152 /* The thread may already be stopping */
4154 return (thread->interruption_requested);
4159 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4161 MonoInternalThread *thread = mono_thread_internal_current ();
4163 /* The thread may already be stopping */
4167 mono_debugger_check_interruption ();
4169 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4170 MonoException* exc = mono_thread_execute_interruption (thread);
4171 if (exc) mono_raise_exception (exc);
4176 * Performs the interruption of the current thread, if one has been requested,
4177 * and the thread is not running a protected wrapper.
4179 void mono_thread_interruption_checkpoint ()
4181 mono_thread_interruption_checkpoint_request (FALSE);
4185 * Performs the interruption of the current thread, if one has been requested.
4187 void mono_thread_force_interruption_checkpoint ()
4189 mono_thread_interruption_checkpoint_request (TRUE);
4193 * mono_thread_get_and_clear_pending_exception:
4195 * Return any pending exceptions for the current thread and clear it as a side effect.
4198 mono_thread_get_and_clear_pending_exception (void)
4200 MonoInternalThread *thread = mono_thread_internal_current ();
4202 /* The thread may already be stopping */
4206 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4207 return mono_thread_execute_interruption (thread);
4210 if (thread->pending_exception) {
4211 MonoException *exc = thread->pending_exception;
4213 thread->pending_exception = NULL;
4221 * mono_set_pending_exception:
4223 * Set the pending exception of the current thread to EXC.
4224 * The exception will be thrown when execution returns to managed code.
4227 mono_set_pending_exception (MonoException *exc)
4229 MonoInternalThread *thread = mono_thread_internal_current ();
4231 /* The thread may already be stopping */
4235 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4237 mono_thread_request_interruption (FALSE);
4241 * mono_thread_interruption_request_flag:
4243 * Returns the address of a flag that will be non-zero if an interruption has
4244 * been requested for a thread. The thread to interrupt may not be the current
4245 * thread, so an additional call to mono_thread_interruption_requested() or
4246 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4249 gint32* mono_thread_interruption_request_flag ()
4251 return &thread_interruption_requested;
4255 mono_thread_init_apartment_state (void)
4258 MonoInternalThread* thread = mono_thread_internal_current ();
4260 /* Positive return value indicates success, either
4261 * S_OK if this is first CoInitialize call, or
4262 * S_FALSE if CoInitialize already called, but with same
4263 * threading model. A negative value indicates failure,
4264 * probably due to trying to change the threading model.
4266 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4267 ? COINIT_APARTMENTTHREADED
4268 : COINIT_MULTITHREADED) < 0) {
4269 thread->apartment_state = ThreadApartmentState_Unknown;
4275 mono_thread_cleanup_apartment_state (void)
4278 MonoInternalThread* thread = mono_thread_internal_current ();
4280 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4287 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4289 ensure_synch_cs_set (thread);
4291 EnterCriticalSection (thread->synch_cs);
4292 thread->state |= state;
4293 LeaveCriticalSection (thread->synch_cs);
4297 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4299 ensure_synch_cs_set (thread);
4301 EnterCriticalSection (thread->synch_cs);
4302 thread->state &= ~state;
4303 LeaveCriticalSection (thread->synch_cs);
4307 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4309 gboolean ret = FALSE;
4311 ensure_synch_cs_set (thread);
4313 EnterCriticalSection (thread->synch_cs);
4315 if ((thread->state & test) != 0) {
4319 LeaveCriticalSection (thread->synch_cs);
4324 //static MonoClassField *execution_context_field;
4327 get_execution_context_addr (void)
4329 MonoDomain *domain = mono_domain_get ();
4330 guint32 offset = domain->execution_context_field_offset;
4333 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4336 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4338 mono_domain_lock (domain);
4339 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4340 mono_domain_unlock (domain);
4343 domain->execution_context_field_offset = offset;
4346 return (MonoObject**) mono_get_special_static_data (offset);
4350 mono_thread_get_execution_context (void)
4352 return *get_execution_context_addr ();
4356 mono_thread_set_execution_context (MonoObject *ec)
4358 *get_execution_context_addr () = ec;
4361 static gboolean has_tls_get = FALSE;
4364 mono_runtime_set_has_tls_get (gboolean val)
4370 mono_runtime_has_tls_get (void)
4376 mono_thread_kill (MonoInternalThread *thread, int signal)
4379 /* Win32 uses QueueUserAPC and callers of this are guarded */
4380 g_assert_not_reached ();
4382 # ifdef PTHREAD_POINTER_ID
4383 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4385 # ifdef PLATFORM_ANDROID
4386 if (thread->android_tid != 0) {
4388 int old_errno = errno;
4390 ret = tkill ((pid_t) thread->android_tid, signal);
4399 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4401 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4408 self_interrupt_thread (void *_unused)
4410 MonoThreadInfo *info = mono_thread_info_current ();
4411 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4412 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4413 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4414 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4418 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4422 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4426 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4428 MonoJitInfo **dest = data;
4434 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4436 MonoJitInfo *ji = NULL;
4437 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4442 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4445 MonoThreadInfo *info = NULL;
4446 gboolean protected_wrapper;
4447 gboolean running_managed;
4449 if (!mono_thread_info_new_interrupt_enabled ()) {
4450 signal_thread_state_change (thread);
4455 FIXME this is insanely broken, it doesn't cause interruption to happen
4456 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4458 if (thread == mono_thread_internal_current ()) {
4459 /* Do it synchronously */
4460 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4462 mono_raise_exception (exc);
4464 wapi_interrupt_thread (thread->handle);
4469 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4470 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4474 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4475 mono_thread_info_resume (mono_thread_info_get_tid (info));
4479 /*someone is already interrupting it*/
4480 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4481 mono_thread_info_resume (mono_thread_info_get_tid (info));
4485 ji = mono_thread_info_get_last_managed (info);
4486 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4487 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4489 if (!protected_wrapper && running_managed) {
4490 /*We are in managed code*/
4491 /*Set the thread to call */
4492 if (install_async_abort)
4493 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4494 mono_thread_info_resume (mono_thread_info_get_tid (info));
4496 gpointer interrupt_handle;
4498 * This will cause waits to be broken.
4499 * It will also prevent the thread from entering a wait, so if the thread returns
4500 * from the wait before it receives the abort signal, it will just spin in the wait
4501 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4504 InterlockedIncrement (&thread_interruption_requested);
4506 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4508 mono_thread_info_resume (mono_thread_info_get_tid (info));
4510 wapi_finish_interrupt_thread (interrupt_handle);
4513 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4517 transition_to_suspended (MonoInternalThread *thread)
4519 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4520 g_assert (0); /*FIXME we should not reach this */
4521 /*Make sure we balance the suspend count.*/
4522 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4524 thread->state &= ~ThreadState_SuspendRequested;
4525 thread->state |= ThreadState_Suspended;
4527 LeaveCriticalSection (thread->synch_cs);
4531 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4533 if (!mono_thread_info_new_interrupt_enabled ()) {
4534 signal_thread_state_change (thread);
4538 EnterCriticalSection (thread->synch_cs);
4539 if (thread == mono_thread_internal_current ()) {
4540 transition_to_suspended (thread);
4541 mono_thread_info_self_suspend ();
4543 MonoThreadInfo *info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt);
4544 MonoJitInfo *ji = mono_thread_info_get_last_managed (info);
4545 gboolean protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4546 gboolean running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4548 if (running_managed && !protected_wrapper) {
4549 transition_to_suspended (thread);
4551 gpointer interrupt_handle;
4553 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4554 InterlockedIncrement (&thread_interruption_requested);
4557 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4559 mono_thread_info_resume (mono_thread_info_get_tid (info));
4562 wapi_finish_interrupt_thread (interrupt_handle);
4564 LeaveCriticalSection (thread->synch_cs);
4569 /*This is called with @thread synch_cs held and it must release it*/
4571 self_suspend_internal (MonoInternalThread *thread)
4573 if (!mono_thread_info_new_interrupt_enabled ()) {
4574 thread->state &= ~ThreadState_SuspendRequested;
4575 thread->state |= ThreadState_Suspended;
4576 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4577 if (thread->suspend_event == NULL) {
4578 LeaveCriticalSection (thread->synch_cs);
4581 if (thread->suspended_event)
4582 SetEvent (thread->suspended_event);
4584 LeaveCriticalSection (thread->synch_cs);
4586 if (shutting_down) {
4587 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4592 WaitForSingleObject (thread->suspend_event, INFINITE);
4594 EnterCriticalSection (thread->synch_cs);
4596 CloseHandle (thread->suspend_event);
4597 thread->suspend_event = NULL;
4598 thread->state &= ~ThreadState_Suspended;
4600 /* The thread that requested the resume will have replaced this event
4601 * and will be waiting for it
4603 SetEvent (thread->resume_event);
4605 LeaveCriticalSection (thread->synch_cs);
4609 transition_to_suspended (thread);
4610 mono_thread_info_self_suspend ();
4613 /*This is called with @thread synch_cs held and it must release it*/
4615 resume_thread_internal (MonoInternalThread *thread)
4617 if (!mono_thread_info_new_interrupt_enabled ()) {
4618 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4619 if (thread->resume_event == NULL) {
4620 LeaveCriticalSection (thread->synch_cs);
4624 /* Awake the thread */
4625 SetEvent (thread->suspend_event);
4627 LeaveCriticalSection (thread->synch_cs);
4629 /* Wait for the thread to awake */
4630 WaitForSingleObject (thread->resume_event, INFINITE);
4631 CloseHandle (thread->resume_event);
4632 thread->resume_event = NULL;
4636 LeaveCriticalSection (thread->synch_cs);
4637 /* Awake the thread */
4638 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4640 EnterCriticalSection (thread->synch_cs);
4641 thread->state &= ~ThreadState_Suspended;
4642 LeaveCriticalSection (thread->synch_cs);