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 ensure_synch_cs_set (thread);
369 EnterCriticalSection (thread->synch_cs);
371 thread->state |= ThreadState_Stopped;
372 thread->state &= ~ThreadState_Background;
374 LeaveCriticalSection (thread->synch_cs);
377 An interruption request has leaked to cleanup. Adjust the global counter.
379 This can happen is the abort source thread finds the abortee (this) thread
380 in unmanaged code. If this thread never trips back to managed code or check
381 the local flag it will be left set and positively unbalance the global counter.
383 Leaving the counter unbalanced will cause a performance degradation since all threads
384 will now keep checking their local flags all the time.
386 if (InterlockedExchange (&thread->interruption_requested, 0))
387 InterlockedDecrement (&thread_interruption_requested);
389 /* if the thread is not in the hash it has been removed already */
390 if (!handle_remove (thread)) {
391 /* This needs to be called even if handle_remove () fails */
392 if (mono_thread_cleanup_fn)
393 mono_thread_cleanup_fn (thread);
396 mono_release_type_locks (thread);
398 mono_profiler_thread_end (thread->tid);
400 if (thread == mono_thread_internal_current ())
401 mono_thread_pop_appdomain_ref ();
403 thread->cached_culture_info = NULL;
405 mono_free_static_data (thread->static_data, TRUE);
406 thread->static_data = NULL;
407 ref_stack_destroy (thread->appdomain_refs);
408 thread->appdomain_refs = NULL;
410 if (mono_thread_cleanup_fn)
411 mono_thread_cleanup_fn (thread);
413 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
417 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
420 g_assert ((offset & 0x80000000) == 0);
421 offset &= 0x7fffffff;
422 idx = (offset >> 24) - 1;
423 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
427 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
429 static MonoClassField *current_thread_field = NULL;
433 if (!current_thread_field) {
434 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
435 g_assert (current_thread_field);
438 mono_class_vtable (domain, mono_defaults.thread_class);
439 mono_domain_lock (domain);
440 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
441 mono_domain_unlock (domain);
444 return get_thread_static_data (thread, offset);
448 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
450 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
452 g_assert (current->obj.vtable->domain == domain);
454 g_assert (!*current_thread_ptr);
455 *current_thread_ptr = current;
458 static MonoInternalThread*
459 create_internal_thread_object (void)
461 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
462 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
466 create_thread_object (MonoDomain *domain)
468 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
469 return (MonoThread*)mono_gc_alloc_mature (vt);
473 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
475 MonoThread *thread = create_thread_object (domain);
476 MONO_OBJECT_SETREF (thread, internal_thread, internal);
481 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
483 MonoDomain *domain = mono_get_root_domain ();
485 if (!candidate || candidate->obj.vtable->domain != domain)
486 candidate = new_thread_with_internal (domain, thread);
487 set_current_thread_for_domain (domain, thread, candidate);
488 g_assert (!thread->root_domain_thread);
489 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
492 static guint32 WINAPI start_wrapper_internal(void *data)
494 MonoThreadInfo *info;
495 struct StartInfo *start_info=(struct StartInfo *)data;
496 guint32 (*start_func)(void *);
500 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
503 MonoInternalThread *internal = start_info->obj->internal_thread;
504 MonoObject *start_delegate = start_info->delegate;
505 MonoDomain *domain = start_info->obj->obj.vtable->domain;
507 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
509 /* We can be sure start_info->obj->tid and
510 * start_info->obj->handle have been set, because the thread
511 * was created suspended, and these values were set before the
515 info = mono_thread_info_current ();
517 internal->thread_info = info;
522 SET_CURRENT_OBJECT (internal);
524 mono_monitor_init_tls ();
526 /* Every thread references the appdomain which created it */
527 mono_thread_push_appdomain_ref (domain);
529 if (!mono_domain_set (domain, FALSE)) {
530 /* No point in raising an appdomain_unloaded exception here */
531 /* FIXME: Cleanup here */
532 mono_thread_pop_appdomain_ref ();
536 start_func = start_info->func;
537 start_arg = start_info->start_arg;
539 /* We have to do this here because mono_thread_new_init()
540 requires that root_domain_thread is set up. */
541 thread_adjust_static_data (internal);
542 init_root_domain_thread (internal, start_info->obj);
544 /* This MUST be called before any managed code can be
545 * executed, as it calls the callback function that (for the
546 * jit) sets the lmf marker.
548 mono_thread_new_init (tid, &tid, start_func);
549 internal->stack_ptr = &tid;
551 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
553 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
555 /* On 2.0 profile (and higher), set explicitly since state might have been
557 if (internal->apartment_state == ThreadApartmentState_Unknown)
558 internal->apartment_state = ThreadApartmentState_MTA;
560 mono_thread_init_apartment_state ();
562 if(internal->start_notify!=NULL) {
563 /* Let the thread that called Start() know we're
566 ReleaseSemaphore (internal->start_notify, 1, NULL);
569 mono_threads_lock ();
570 mono_g_hash_table_remove (thread_start_args, start_info->obj);
571 mono_threads_unlock ();
573 mono_thread_set_execution_context (start_info->obj->ec_to_set);
574 start_info->obj->ec_to_set = NULL;
577 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
581 * Call this after calling start_notify, since the profiler callback might want
582 * to lock the thread, and the lock is held by thread_start () which waits for
585 mono_profiler_thread_start (tid);
587 /* start_func is set only for unmanaged start functions */
589 start_func (start_arg);
592 g_assert (start_delegate != NULL);
593 args [0] = start_arg;
594 /* we may want to handle the exception here. See comment below on unhandled exceptions */
595 mono_runtime_delegate_invoke (start_delegate, args, NULL);
598 /* If the thread calls ExitThread at all, this remaining code
599 * will not be executed, but the main thread will eventually
600 * call thread_cleanup() on this thread's behalf.
603 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
605 thread_cleanup (internal);
607 /* Do any cleanup needed for apartment state. This
608 * cannot be done in thread_cleanup since thread_cleanup could be
609 * called for a thread other than the current thread.
610 * mono_thread_cleanup_apartment_state cleans up apartment
611 * for the current thead */
612 mono_thread_cleanup_apartment_state ();
614 /* Remove the reference to the thread object in the TLS data,
615 * so the thread object can be finalized. This won't be
616 * reached if the thread threw an uncaught exception, so those
617 * thread handles will stay referenced :-( (This is due to
618 * missing support for scanning thread-specific data in the
619 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
622 SET_CURRENT_OBJECT (NULL);
623 mono_domain_unset ();
628 static guint32 WINAPI start_wrapper(void *data)
632 /* Avoid scanning the frames above this frame during a GC */
633 mono_gc_set_stack_end ((void*)&dummy);
635 return start_wrapper_internal (data);
638 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
640 if (mono_thread_start_cb) {
641 mono_thread_start_cb (tid, stack_start, func);
645 void mono_threads_set_default_stacksize (guint32 stacksize)
647 default_stacksize = stacksize;
650 guint32 mono_threads_get_default_stacksize (void)
652 return default_stacksize;
656 * mono_create_thread:
658 * This is a wrapper around CreateThread which handles differences in the type of
659 * the the 'tid' argument.
661 gpointer mono_create_thread (WapiSecurityAttributes *security,
662 guint32 stacksize, WapiThreadStart start,
663 gpointer param, guint32 create, gsize *tid)
670 res = mono_threads_CreateThread (security, stacksize, start, param, create, &real_tid);
674 res = CreateThread (security, stacksize, start, param, create, tid);
681 * The thread start argument may be an object reference, and there is
682 * no ref to keep it alive when the new thread is started but not yet
683 * registered with the collector. So we store it in a GC tracked hash
686 * LOCKING: Assumes the threads lock is held.
689 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
691 if (thread_start_args == NULL) {
692 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
693 thread_start_args = mono_g_hash_table_new (NULL, NULL);
695 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
699 * mono_thread_create_internal:
701 * If NO_DETACH is TRUE, then the thread is not detached using pthread_detach (). This is needed to fix the race condition where waiting for a thred to exit only waits for its exit event to be
702 * signalled, which can cause shutdown crashes if the thread shutdown code accesses data already freed by the runtime shutdown.
703 * Currently, this is only used for the finalizer thread.
706 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, gboolean no_detach, guint32 stack_size)
709 MonoInternalThread *internal;
710 HANDLE thread_handle;
711 struct StartInfo *start_info;
713 guint32 create_flags;
715 thread = create_thread_object (domain);
716 internal = create_internal_thread_object ();
717 MONO_OBJECT_SETREF (thread, internal_thread, internal);
719 start_info=g_new0 (struct StartInfo, 1);
720 start_info->func = func;
721 start_info->obj = thread;
722 start_info->start_arg = arg;
724 mono_threads_lock ();
726 mono_threads_unlock ();
730 if (threads_starting_up == NULL) {
731 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
732 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
735 register_thread_start_argument (thread, start_info);
736 mono_g_hash_table_insert (threads_starting_up, thread, thread);
737 mono_threads_unlock ();
740 stack_size = default_stacksize_for_thread (internal);
742 /* Create suspended, so we can do some housekeeping before the thread
745 create_flags = CREATE_SUSPENDED;
748 create_flags |= CREATE_NO_DETACH;
750 thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
752 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
753 if (thread_handle == NULL) {
754 /* The thread couldn't be created, so throw an exception */
755 mono_threads_lock ();
756 mono_g_hash_table_remove (threads_starting_up, thread);
757 mono_threads_unlock ();
759 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
763 internal->handle=thread_handle;
765 internal->apartment_state=ThreadApartmentState_Unknown;
766 internal->thread_pinning_ref = internal;
767 internal->managed_id = get_next_managed_thread_id ();
768 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
770 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
771 InitializeCriticalSection (internal->synch_cs);
773 internal->threadpool_thread = threadpool_thread;
774 if (threadpool_thread)
775 mono_thread_set_state (internal, ThreadState_Background);
777 if (handle_store (thread))
778 ResumeThread (thread_handle);
780 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
781 if (mono_check_corlib_version () == NULL)
782 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
788 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
790 mono_thread_create_internal (domain, func, arg, FALSE, FALSE, 0);
794 * mono_thread_get_stack_bounds:
796 * Return the address and size of the current threads stack. Return NULL as the
797 * stack address if the stack address cannot be determined.
800 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
802 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
803 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
804 *stsize = pthread_get_stacksize_np (pthread_self ());
806 /* staddr points to the start of the stack, not the end */
808 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
810 /* FIXME: simplify the mess below */
811 #elif !defined(HOST_WIN32)
813 guint8 *current = (guint8*)&attr;
815 pthread_attr_init (&attr);
816 # ifdef HAVE_PTHREAD_GETATTR_NP
817 pthread_getattr_np (pthread_self(), &attr);
819 # ifdef HAVE_PTHREAD_ATTR_GET_NP
820 pthread_attr_get_np (pthread_self(), &attr);
823 pthread_attr_getstacksize (&attr, &stsize);
824 # elif defined(__OpenBSD__)
828 rslt = pthread_stackseg_np(pthread_self(), &ss);
829 g_assert (rslt == 0);
831 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
832 *stsize = ss.ss_size;
841 # if !defined(__OpenBSD__)
842 pthread_attr_getstack (&attr, (void**)staddr, stsize);
845 g_assert ((current > *staddr) && (current < *staddr + *stsize));
848 pthread_attr_destroy (&attr);
851 *stsize = (size_t)-1;
854 /* When running under emacs, sometimes staddr is not aligned to a page size */
855 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
859 mono_thread_attach (MonoDomain *domain)
861 MonoInternalThread *thread;
862 MonoThread *current_thread;
863 HANDLE thread_handle;
866 if ((thread = mono_thread_internal_current ())) {
867 if (domain != mono_domain_get ())
868 mono_domain_set (domain, TRUE);
869 /* Already attached */
870 return mono_thread_current ();
873 if (!mono_gc_register_thread (&domain)) {
874 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 ());
877 thread = create_internal_thread_object ();
879 thread_handle = GetCurrentThread ();
880 g_assert (thread_handle);
882 tid=GetCurrentThreadId ();
885 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
886 * refer to the thread from other threads for things like aborting.
888 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
889 THREAD_ALL_ACCESS, TRUE, 0);
891 thread->handle=thread_handle;
893 #ifdef PLATFORM_ANDROID
894 thread->android_tid = (gpointer) gettid ();
896 thread->apartment_state=ThreadApartmentState_Unknown;
897 thread->thread_pinning_ref = thread;
898 thread->managed_id = get_next_managed_thread_id ();
899 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
901 thread->stack_ptr = &tid;
903 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
904 InitializeCriticalSection (thread->synch_cs);
906 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
908 current_thread = new_thread_with_internal (domain, thread);
910 if (!handle_store (current_thread)) {
911 /* Mono is shutting down, so just wait for the end */
916 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
918 SET_CURRENT_OBJECT (thread);
919 mono_domain_set (domain, TRUE);
921 mono_monitor_init_tls ();
923 thread_adjust_static_data (thread);
925 init_root_domain_thread (thread, current_thread);
926 if (domain != mono_get_root_domain ())
927 set_current_thread_for_domain (domain, thread, current_thread);
930 if (mono_thread_attach_cb) {
934 mono_thread_get_stack_bounds (&staddr, &stsize);
937 mono_thread_attach_cb (tid, &tid);
939 mono_thread_attach_cb (tid, staddr + stsize);
942 // FIXME: Need a separate callback
943 mono_profiler_thread_start (tid);
945 return current_thread;
949 mono_thread_detach (MonoThread *thread)
951 g_return_if_fail (thread != NULL);
953 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
955 mono_profiler_thread_end (thread->internal_thread->tid);
957 thread_cleanup (thread->internal_thread);
959 SET_CURRENT_OBJECT (NULL);
960 mono_domain_unset ();
962 /* Don't need to CloseHandle this thread, even though we took a
963 * reference in mono_thread_attach (), because the GC will do it
964 * when the Thread object is finalised.
971 MonoInternalThread *thread = mono_thread_internal_current ();
973 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
975 thread_cleanup (thread);
976 SET_CURRENT_OBJECT (NULL);
977 mono_domain_unset ();
979 /* we could add a callback here for embedders to use. */
980 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
981 exit (mono_environment_exitcode_get ());
986 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
988 MonoInternalThread *internal = create_internal_thread_object ();
990 internal->state = ThreadState_Unstarted;
991 internal->apartment_state = ThreadApartmentState_Unknown;
992 internal->managed_id = get_next_managed_thread_id ();
994 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
997 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
1000 guint32 (*start_func)(void *);
1001 struct StartInfo *start_info;
1004 MonoInternalThread *internal;
1006 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1008 if (!this->internal_thread)
1009 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1010 internal = this->internal_thread;
1012 ensure_synch_cs_set (internal);
1014 EnterCriticalSection (internal->synch_cs);
1016 if ((internal->state & ThreadState_Unstarted) == 0) {
1017 LeaveCriticalSection (internal->synch_cs);
1018 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1022 if ((internal->state & ThreadState_Aborted) != 0) {
1023 LeaveCriticalSection (internal->synch_cs);
1028 /* This is freed in start_wrapper */
1029 start_info = g_new0 (struct StartInfo, 1);
1030 start_info->func = start_func;
1031 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1032 start_info->delegate = start;
1033 start_info->obj = this;
1034 g_assert (this->obj.vtable->domain == mono_domain_get ());
1036 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1037 if (internal->start_notify==NULL) {
1038 LeaveCriticalSection (internal->synch_cs);
1039 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1040 g_free (start_info);
1044 mono_threads_lock ();
1045 register_thread_start_argument (this, start_info);
1046 if (threads_starting_up == NULL) {
1047 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1048 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1050 mono_g_hash_table_insert (threads_starting_up, this, this);
1051 mono_threads_unlock ();
1053 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1054 CREATE_SUSPENDED, &tid);
1056 LeaveCriticalSection (internal->synch_cs);
1057 mono_threads_lock ();
1058 mono_g_hash_table_remove (threads_starting_up, this);
1059 mono_threads_unlock ();
1060 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1064 internal->handle=thread;
1066 internal->thread_pinning_ref = internal;
1067 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1070 /* Don't call handle_store() here, delay it to Start.
1071 * We can't join a thread (trying to will just block
1072 * forever) until it actually starts running, so don't
1073 * store the handle till then.
1076 mono_thread_start (this);
1078 internal->state &= ~ThreadState_Unstarted;
1080 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1082 LeaveCriticalSection (internal->synch_cs);
1087 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1089 MONO_ARCH_SAVE_REGS;
1091 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1094 CloseHandle (thread);
1096 if (this->synch_cs) {
1097 CRITICAL_SECTION *synch_cs = this->synch_cs;
1098 this->synch_cs = NULL;
1099 DeleteCriticalSection (synch_cs);
1104 void *name = this->name;
1110 static void mono_thread_start (MonoThread *thread)
1112 MonoInternalThread *internal = thread->internal_thread;
1114 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1116 /* Only store the handle when the thread is about to be
1117 * launched, to avoid the main thread deadlocking while trying
1118 * to clean up a thread that will never be signalled.
1120 if (!handle_store (thread))
1123 ResumeThread (internal->handle);
1125 if(internal->start_notify!=NULL) {
1126 /* Wait for the thread to set up its TLS data etc, so
1127 * theres no potential race condition if someone tries
1128 * to look up the data believing the thread has
1132 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1134 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1135 CloseHandle (internal->start_notify);
1136 internal->start_notify = NULL;
1139 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1142 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1145 MonoInternalThread *thread = mono_thread_internal_current ();
1147 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1149 mono_thread_current_check_pending_interrupt ();
1152 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1154 res = SleepEx(ms,TRUE);
1156 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1158 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1159 MonoException* exc = mono_thread_execute_interruption (thread);
1161 mono_raise_exception (exc);
1173 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1178 ves_icall_System_Threading_Thread_GetDomainID (void)
1180 MONO_ARCH_SAVE_REGS;
1182 return mono_domain_get()->domain_id;
1186 ves_icall_System_Threading_Thread_Yield (void)
1189 return SwitchToThread ();
1191 return sched_yield () == 0;
1196 * mono_thread_get_name:
1198 * Return the name of the thread. NAME_LEN is set to the length of the name.
1199 * Return NULL if the thread has no name. The returned memory is owned by the
1203 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1207 ensure_synch_cs_set (this_obj);
1209 EnterCriticalSection (this_obj->synch_cs);
1211 if (!this_obj->name) {
1215 *name_len = this_obj->name_len;
1216 res = g_new (gunichar2, this_obj->name_len);
1217 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1220 LeaveCriticalSection (this_obj->synch_cs);
1226 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1230 ensure_synch_cs_set (this_obj);
1232 EnterCriticalSection (this_obj->synch_cs);
1234 if (!this_obj->name)
1237 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1239 LeaveCriticalSection (this_obj->synch_cs);
1245 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1247 ensure_synch_cs_set (this_obj);
1249 EnterCriticalSection (this_obj->synch_cs);
1251 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1252 LeaveCriticalSection (this_obj->synch_cs);
1254 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1258 this_obj->name = g_new (gunichar2, mono_string_length (name));
1259 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1260 this_obj->name_len = mono_string_length (name);
1263 this_obj->name = NULL;
1266 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1268 LeaveCriticalSection (this_obj->synch_cs);
1269 if (this_obj->name) {
1270 char *tname = mono_string_to_utf8 (name);
1271 mono_profiler_thread_name (this_obj->tid, tname);
1277 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1279 mono_thread_set_name_internal (this_obj, name, TRUE);
1282 /* If the array is already in the requested domain, we just return it,
1283 otherwise we return a copy in that domain. */
1285 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1292 if (mono_object_domain (arr) == domain)
1295 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1296 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1301 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1303 return byte_array_to_domain (arr, mono_get_root_domain ());
1307 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1309 return byte_array_to_domain (arr, mono_domain_get ());
1313 mono_thread_current (void)
1315 MonoDomain *domain = mono_domain_get ();
1316 MonoInternalThread *internal = mono_thread_internal_current ();
1317 MonoThread **current_thread_ptr;
1319 g_assert (internal);
1320 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1322 if (!*current_thread_ptr) {
1323 g_assert (domain != mono_get_root_domain ());
1324 *current_thread_ptr = new_thread_with_internal (domain, internal);
1326 return *current_thread_ptr;
1330 mono_thread_internal_current (void)
1332 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1333 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1337 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1338 int ms, HANDLE thread)
1340 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1343 mono_thread_current_check_pending_interrupt ();
1345 ensure_synch_cs_set (this);
1347 EnterCriticalSection (this->synch_cs);
1349 if ((this->state & ThreadState_Unstarted) != 0) {
1350 LeaveCriticalSection (this->synch_cs);
1352 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1356 LeaveCriticalSection (this->synch_cs);
1361 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1363 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1365 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1367 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1369 if(ret==WAIT_OBJECT_0) {
1370 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1375 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1381 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1389 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1392 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1394 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1396 if (ret != WAIT_IO_COMPLETION)
1399 exc = mono_thread_execute_interruption (thread);
1401 mono_raise_exception (exc);
1406 /* Re-calculate ms according to the time passed */
1407 diff_ms = (mono_100ns_ticks () - start) / 10000;
1408 if (diff_ms >= ms) {
1412 wait = ms - diff_ms;
1418 /* FIXME: exitContext isnt documented */
1419 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1425 MonoObject *waitHandle;
1426 MonoInternalThread *thread = mono_thread_internal_current ();
1428 /* Do this WaitSleepJoin check before creating objects */
1429 mono_thread_current_check_pending_interrupt ();
1431 numhandles = mono_array_length(mono_handles);
1432 handles = g_new0(HANDLE, numhandles);
1434 for(i = 0; i < numhandles; i++) {
1435 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1436 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1443 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1445 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1447 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1451 if(ret==WAIT_FAILED) {
1452 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1454 } else if(ret==WAIT_TIMEOUT) {
1455 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1462 /* FIXME: exitContext isnt documented */
1463 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1465 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1469 MonoObject *waitHandle;
1470 MonoInternalThread *thread = mono_thread_internal_current ();
1472 /* Do this WaitSleepJoin check before creating objects */
1473 mono_thread_current_check_pending_interrupt ();
1475 numhandles = mono_array_length(mono_handles);
1476 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1479 for(i = 0; i < numhandles; i++) {
1480 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1481 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1488 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1490 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1492 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1494 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1497 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1499 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1500 return ret - WAIT_OBJECT_0;
1502 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1503 return ret - WAIT_ABANDONED_0;
1510 /* FIXME: exitContext isnt documented */
1511 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1514 MonoInternalThread *thread = mono_thread_internal_current ();
1516 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1522 mono_thread_current_check_pending_interrupt ();
1524 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1526 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1528 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1530 if(ret==WAIT_FAILED) {
1531 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1533 } else if(ret==WAIT_TIMEOUT) {
1534 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1542 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1545 MonoInternalThread *thread = mono_thread_internal_current ();
1547 MONO_ARCH_SAVE_REGS;
1552 mono_thread_current_check_pending_interrupt ();
1554 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1556 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1558 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1560 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1563 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1567 MONO_ARCH_SAVE_REGS;
1572 mutex = CreateMutex (NULL, owned, NULL);
1574 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1576 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1584 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1585 MONO_ARCH_SAVE_REGS;
1587 return(ReleaseMutex (handle));
1590 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1596 MONO_ARCH_SAVE_REGS;
1598 *error = ERROR_SUCCESS;
1600 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1602 *error = GetLastError ();
1609 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1613 MONO_ARCH_SAVE_REGS;
1618 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1620 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1621 mono_string_chars (name));
1623 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1631 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1635 MONO_ARCH_SAVE_REGS;
1637 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1642 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1646 MONO_ARCH_SAVE_REGS;
1648 *error = ERROR_SUCCESS;
1650 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1652 *error = GetLastError ();
1658 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1662 MONO_ARCH_SAVE_REGS;
1667 event = CreateEvent (NULL, manual, initial, NULL);
1669 event = CreateEvent (NULL, manual, initial,
1670 mono_string_chars (name));
1672 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1680 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1681 MONO_ARCH_SAVE_REGS;
1683 return (SetEvent(handle));
1686 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1687 MONO_ARCH_SAVE_REGS;
1689 return (ResetEvent(handle));
1693 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1694 MONO_ARCH_SAVE_REGS;
1696 CloseHandle (handle);
1699 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1705 MONO_ARCH_SAVE_REGS;
1707 *error = ERROR_SUCCESS;
1709 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1711 *error = GetLastError ();
1717 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1719 MONO_ARCH_SAVE_REGS;
1721 return InterlockedIncrement (location);
1724 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1728 MONO_ARCH_SAVE_REGS;
1730 mono_interlocked_lock ();
1734 mono_interlocked_unlock ();
1740 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1742 MONO_ARCH_SAVE_REGS;
1744 return InterlockedDecrement(location);
1747 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1751 MONO_ARCH_SAVE_REGS;
1753 mono_interlocked_lock ();
1757 mono_interlocked_unlock ();
1762 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1764 MONO_ARCH_SAVE_REGS;
1766 return InterlockedExchange(location, value);
1769 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1772 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1773 mono_gc_wbarrier_generic_nostore (location);
1777 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1779 return InterlockedExchangePointer(location, value);
1782 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1784 IntFloatUnion val, ret;
1786 MONO_ARCH_SAVE_REGS;
1789 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1795 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1797 #if SIZEOF_VOID_P == 8
1798 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1803 * According to MSDN, this function is only atomic with regards to the
1804 * other Interlocked functions on 32 bit platforms.
1806 mono_interlocked_lock ();
1809 mono_interlocked_unlock ();
1816 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1818 #if SIZEOF_VOID_P == 8
1819 LongDoubleUnion val, ret;
1822 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1829 * According to MSDN, this function is only atomic with regards to the
1830 * other Interlocked functions on 32 bit platforms.
1832 mono_interlocked_lock ();
1835 mono_interlocked_unlock ();
1841 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1843 MONO_ARCH_SAVE_REGS;
1845 return InterlockedCompareExchange(location, value, comparand);
1848 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1851 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1852 mono_gc_wbarrier_generic_nostore (location);
1856 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1858 return InterlockedCompareExchangePointer(location, value, comparand);
1861 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1863 IntFloatUnion val, ret, cmp;
1865 MONO_ARCH_SAVE_REGS;
1868 cmp.fval = comparand;
1869 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1875 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1877 #if SIZEOF_VOID_P == 8
1878 LongDoubleUnion val, comp, ret;
1881 comp.fval = comparand;
1882 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1888 mono_interlocked_lock ();
1890 if (old == comparand)
1892 mono_interlocked_unlock ();
1899 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1901 #if SIZEOF_VOID_P == 8
1902 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1906 mono_interlocked_lock ();
1908 if (old == comparand)
1910 mono_interlocked_unlock ();
1917 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1920 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1921 mono_gc_wbarrier_generic_nostore (location);
1926 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1929 res = InterlockedExchangePointer ((gpointer *)location, value);
1930 mono_gc_wbarrier_generic_nostore (location);
1935 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1937 #if SIZEOF_VOID_P == 8
1938 /* Should be implemented as a JIT intrinsic */
1939 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1944 mono_interlocked_lock ();
1946 *location = orig + value;
1947 mono_interlocked_unlock ();
1949 return orig + value;
1954 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1956 #if SIZEOF_VOID_P == 8
1957 /* Should be implemented as a JIT intrinsic */
1958 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1963 mono_interlocked_lock ();
1965 *location = orig + value;
1966 mono_interlocked_unlock ();
1968 return orig + value;
1973 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1975 #if SIZEOF_VOID_P == 8
1976 /* 64 bit reads are already atomic */
1981 mono_interlocked_lock ();
1983 mono_interlocked_unlock ();
1990 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1992 mono_threads_lock ();
1993 mono_threads_unlock ();
1997 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1999 mono_thread_clr_state (this, state);
2001 if (state & ThreadState_Background) {
2002 /* If the thread changes the background mode, the main thread has to
2003 * be notified, since it has to rebuild the list of threads to
2006 SetEvent (background_change_event);
2011 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2013 mono_thread_set_state (this, state);
2015 if (state & ThreadState_Background) {
2016 /* If the thread changes the background mode, the main thread has to
2017 * be notified, since it has to rebuild the list of threads to
2020 SetEvent (background_change_event);
2025 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2029 ensure_synch_cs_set (this);
2031 EnterCriticalSection (this->synch_cs);
2033 state = this->state;
2035 LeaveCriticalSection (this->synch_cs);
2040 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2042 MonoInternalThread *current;
2045 ensure_synch_cs_set (this);
2047 current = mono_thread_internal_current ();
2049 EnterCriticalSection (this->synch_cs);
2051 this->thread_interrupt_requested = TRUE;
2052 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2054 LeaveCriticalSection (this->synch_cs);
2057 abort_thread_internal (this, TRUE, FALSE);
2061 void mono_thread_current_check_pending_interrupt ()
2063 MonoInternalThread *thread = mono_thread_internal_current ();
2064 gboolean throw = FALSE;
2066 mono_debugger_check_interruption ();
2068 ensure_synch_cs_set (thread);
2070 EnterCriticalSection (thread->synch_cs);
2072 if (thread->thread_interrupt_requested) {
2074 thread->thread_interrupt_requested = FALSE;
2077 LeaveCriticalSection (thread->synch_cs);
2080 mono_raise_exception (mono_get_exception_thread_interrupted ());
2085 mono_thread_get_abort_signal (void)
2089 #elif defined(PLATFORM_ANDROID)
2091 #elif !defined (SIGRTMIN)
2096 #endif /* SIGUSR1 */
2098 static int abort_signum = -1;
2100 if (abort_signum != -1)
2101 return abort_signum;
2102 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2103 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2104 struct sigaction sinfo;
2105 sigaction (i, NULL, &sinfo);
2106 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2111 /* fallback to the old way */
2113 #endif /* HOST_WIN32 */
2117 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2119 MonoException* exc = mono_thread_request_interruption (FALSE);
2120 if (exc) mono_raise_exception (exc);
2122 #endif /* HOST_WIN32 */
2125 * signal_thread_state_change
2127 * Tells the thread that his state has changed and it has to enter the new
2128 * state as soon as possible.
2130 static void signal_thread_state_change (MonoInternalThread *thread)
2132 if (thread == mono_thread_internal_current ()) {
2133 /* Do it synchronously */
2134 MonoException *exc = mono_thread_request_interruption (FALSE);
2136 mono_raise_exception (exc);
2140 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2142 /* fixme: store the state somewhere */
2143 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2146 * This will cause waits to be broken.
2147 * It will also prevent the thread from entering a wait, so if the thread returns
2148 * from the wait before it receives the abort signal, it will just spin in the wait
2149 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2152 wapi_interrupt_thread (thread->handle);
2153 #endif /* HOST_WIN32 */
2157 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2159 ensure_synch_cs_set (thread);
2161 EnterCriticalSection (thread->synch_cs);
2163 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2164 (thread->state & ThreadState_StopRequested) != 0 ||
2165 (thread->state & ThreadState_Stopped) != 0)
2167 LeaveCriticalSection (thread->synch_cs);
2171 if ((thread->state & ThreadState_Unstarted) != 0) {
2172 thread->state |= ThreadState_Aborted;
2173 LeaveCriticalSection (thread->synch_cs);
2177 thread->state |= ThreadState_AbortRequested;
2178 if (thread->abort_state_handle)
2179 mono_gchandle_free (thread->abort_state_handle);
2181 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2182 g_assert (thread->abort_state_handle);
2184 thread->abort_state_handle = 0;
2186 thread->abort_exc = NULL;
2189 * abort_exc is set in mono_thread_execute_interruption(),
2190 * triggered by the call to signal_thread_state_change(),
2191 * below. There's a point between where we have
2192 * abort_state_handle set, but abort_exc NULL, but that's not
2196 LeaveCriticalSection (thread->synch_cs);
2198 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2200 /* During shutdown, we can't wait for other threads */
2202 /* Make sure the thread is awake */
2203 mono_thread_resume (thread);
2205 abort_thread_internal (thread, TRUE, TRUE);
2209 ves_icall_System_Threading_Thread_ResetAbort (void)
2211 MonoInternalThread *thread = mono_thread_internal_current ();
2212 gboolean was_aborting;
2214 ensure_synch_cs_set (thread);
2216 EnterCriticalSection (thread->synch_cs);
2217 was_aborting = thread->state & ThreadState_AbortRequested;
2218 thread->state &= ~ThreadState_AbortRequested;
2219 LeaveCriticalSection (thread->synch_cs);
2221 if (!was_aborting) {
2222 const char *msg = "Unable to reset abort because no abort was requested";
2223 mono_raise_exception (mono_get_exception_thread_state (msg));
2225 thread->abort_exc = NULL;
2226 if (thread->abort_state_handle) {
2227 mono_gchandle_free (thread->abort_state_handle);
2228 /* This is actually not necessary - the handle
2229 only counts if the exception is set */
2230 thread->abort_state_handle = 0;
2235 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2237 ensure_synch_cs_set (thread);
2239 EnterCriticalSection (thread->synch_cs);
2241 thread->state &= ~ThreadState_AbortRequested;
2243 if (thread->abort_exc) {
2244 thread->abort_exc = NULL;
2245 if (thread->abort_state_handle) {
2246 mono_gchandle_free (thread->abort_state_handle);
2247 /* This is actually not necessary - the handle
2248 only counts if the exception is set */
2249 thread->abort_state_handle = 0;
2253 LeaveCriticalSection (thread->synch_cs);
2257 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2259 MonoInternalThread *thread = this->internal_thread;
2260 MonoObject *state, *deserialized = NULL, *exc;
2263 if (!thread->abort_state_handle)
2266 state = mono_gchandle_get_target (thread->abort_state_handle);
2269 domain = mono_domain_get ();
2270 if (mono_object_domain (state) == domain)
2273 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2275 if (!deserialized) {
2276 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2278 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2279 mono_raise_exception (invalid_op_exc);
2282 return deserialized;
2286 mono_thread_suspend (MonoInternalThread *thread)
2288 ensure_synch_cs_set (thread);
2290 EnterCriticalSection (thread->synch_cs);
2292 if ((thread->state & ThreadState_Unstarted) != 0 ||
2293 (thread->state & ThreadState_Aborted) != 0 ||
2294 (thread->state & ThreadState_Stopped) != 0)
2296 LeaveCriticalSection (thread->synch_cs);
2300 if ((thread->state & ThreadState_Suspended) != 0 ||
2301 (thread->state & ThreadState_SuspendRequested) != 0 ||
2302 (thread->state & ThreadState_StopRequested) != 0)
2304 LeaveCriticalSection (thread->synch_cs);
2308 thread->state |= ThreadState_SuspendRequested;
2310 LeaveCriticalSection (thread->synch_cs);
2312 suspend_thread_internal (thread, FALSE);
2317 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2319 if (!mono_thread_suspend (thread))
2320 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2324 mono_thread_resume (MonoInternalThread *thread)
2326 ensure_synch_cs_set (thread);
2328 EnterCriticalSection (thread->synch_cs);
2330 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2331 thread->state &= ~ThreadState_SuspendRequested;
2332 LeaveCriticalSection (thread->synch_cs);
2336 if ((thread->state & ThreadState_Suspended) == 0 ||
2337 (thread->state & ThreadState_Unstarted) != 0 ||
2338 (thread->state & ThreadState_Aborted) != 0 ||
2339 (thread->state & ThreadState_Stopped) != 0)
2341 LeaveCriticalSection (thread->synch_cs);
2345 return resume_thread_internal (thread);
2349 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2351 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2352 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2356 mono_threads_is_critical_method (MonoMethod *method)
2358 switch (method->wrapper_type) {
2359 case MONO_WRAPPER_RUNTIME_INVOKE:
2360 case MONO_WRAPPER_XDOMAIN_INVOKE:
2361 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2368 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2373 if (mono_threads_is_critical_method (m)) {
2374 *((gboolean*)data) = TRUE;
2381 is_running_protected_wrapper (void)
2383 gboolean found = FALSE;
2384 mono_stack_walk (find_wrapper, &found);
2388 void mono_thread_internal_stop (MonoInternalThread *thread)
2390 ensure_synch_cs_set (thread);
2392 EnterCriticalSection (thread->synch_cs);
2394 if ((thread->state & ThreadState_StopRequested) != 0 ||
2395 (thread->state & ThreadState_Stopped) != 0)
2397 LeaveCriticalSection (thread->synch_cs);
2401 /* Make sure the thread is awake */
2402 mono_thread_resume (thread);
2404 thread->state |= ThreadState_StopRequested;
2405 thread->state &= ~ThreadState_AbortRequested;
2407 LeaveCriticalSection (thread->synch_cs);
2409 abort_thread_internal (thread, TRUE, TRUE);
2412 void mono_thread_stop (MonoThread *thread)
2414 mono_thread_internal_stop (thread->internal_thread);
2418 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2420 return *((volatile gint8 *) (ptr));
2424 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2426 return *((volatile gint16 *) (ptr));
2430 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2432 return *((volatile gint32 *) (ptr));
2436 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2438 return *((volatile gint64 *) (ptr));
2442 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2444 return (void *) *((volatile void **) ptr);
2448 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2450 return *((volatile double *) (ptr));
2454 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2456 return *((volatile float *) (ptr));
2460 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2462 *((volatile gint8 *) ptr) = value;
2466 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2468 *((volatile gint16 *) ptr) = value;
2472 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2474 *((volatile gint32 *) ptr) = value;
2478 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2480 *((volatile gint64 *) ptr) = value;
2484 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2486 *((volatile void **) ptr) = value;
2490 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2492 mono_gc_wbarrier_generic_store (ptr, value);
2496 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2498 *((volatile double *) ptr) = value;
2502 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2504 *((volatile float *) ptr) = value;
2507 void mono_thread_init (MonoThreadStartCB start_cb,
2508 MonoThreadAttachCB attach_cb)
2510 InitializeCriticalSection(&threads_mutex);
2511 InitializeCriticalSection(&interlocked_mutex);
2512 InitializeCriticalSection(&contexts_mutex);
2514 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2515 g_assert(background_change_event != NULL);
2517 mono_init_static_data_info (&thread_static_info);
2518 mono_init_static_data_info (&context_static_info);
2520 MONO_FAST_TLS_INIT (tls_current_object);
2521 mono_native_tls_alloc (¤t_object_key, NULL);
2522 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2524 mono_thread_start_cb = start_cb;
2525 mono_thread_attach_cb = attach_cb;
2527 /* Get a pseudo handle to the current process. This is just a
2528 * kludge so that wapi can build a process handle if needed.
2529 * As a pseudo handle is returned, we don't need to clean
2532 GetCurrentProcess ();
2535 void mono_thread_cleanup (void)
2537 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2538 /* The main thread must abandon any held mutexes (particularly
2539 * important for named mutexes as they are shared across
2540 * processes, see bug 74680.) This will happen when the
2541 * thread exits, but if it's not running in a subthread it
2542 * won't exit in time.
2544 /* Using non-w32 API is a nasty kludge, but I couldn't find
2545 * anything in the documentation that would let me do this
2546 * here yet still be safe to call on windows.
2548 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2552 /* This stuff needs more testing, it seems one of these
2553 * critical sections can be locked when mono_thread_cleanup is
2556 DeleteCriticalSection (&threads_mutex);
2557 DeleteCriticalSection (&interlocked_mutex);
2558 DeleteCriticalSection (&contexts_mutex);
2559 DeleteCriticalSection (&delayed_free_table_mutex);
2560 DeleteCriticalSection (&small_id_mutex);
2561 CloseHandle (background_change_event);
2564 mono_native_tls_free (current_object_key);
2568 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2570 mono_thread_cleanup_fn = func;
2574 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2576 thread->internal_thread->manage_callback = func;
2579 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2581 mono_thread_notify_pending_exc_fn = func;
2585 static void print_tids (gpointer key, gpointer value, gpointer user)
2587 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2588 * sizeof(uint) and a cast to uint would overflow
2590 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2591 * print this as a pointer.
2593 g_message ("Waiting for: %p", key);
2598 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2599 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2603 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2607 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2609 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2611 if(ret==WAIT_FAILED) {
2612 /* See the comment in build_wait_tids() */
2613 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2617 for(i=0; i<wait->num; i++)
2618 CloseHandle (wait->handles[i]);
2620 if (ret == WAIT_TIMEOUT)
2623 for(i=0; i<wait->num; i++) {
2624 gsize tid = wait->threads[i]->tid;
2626 mono_threads_lock ();
2627 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2628 /* This thread must have been killed, because
2629 * it hasn't cleaned itself up. (It's just
2630 * possible that the thread exited before the
2631 * parent thread had a chance to store the
2632 * handle, and now there is another pointer to
2633 * the already-exited thread stored. In this
2634 * case, we'll just get two
2635 * mono_profiler_thread_end() calls for the
2639 mono_threads_unlock ();
2640 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2641 thread_cleanup (wait->threads[i]);
2643 mono_threads_unlock ();
2648 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2650 guint32 i, ret, count;
2652 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2654 /* Add the thread state change event, so it wakes up if a thread changes
2655 * to background mode.
2658 if (count < MAXIMUM_WAIT_OBJECTS) {
2659 wait->handles [count] = background_change_event;
2663 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2665 if(ret==WAIT_FAILED) {
2666 /* See the comment in build_wait_tids() */
2667 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2671 for(i=0; i<wait->num; i++)
2672 CloseHandle (wait->handles[i]);
2674 if (ret == WAIT_TIMEOUT)
2677 if (ret < wait->num) {
2678 gsize tid = wait->threads[ret]->tid;
2679 mono_threads_lock ();
2680 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2681 /* See comment in wait_for_tids about thread cleanup */
2682 mono_threads_unlock ();
2683 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2684 thread_cleanup (wait->threads [ret]);
2686 mono_threads_unlock ();
2690 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2692 struct wait_data *wait=(struct wait_data *)user;
2694 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2696 MonoInternalThread *thread=(MonoInternalThread *)value;
2698 /* Ignore background threads, we abort them later */
2699 /* Do not lock here since it is not needed and the caller holds threads_lock */
2700 if (thread->state & ThreadState_Background) {
2701 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2702 return; /* just leave, ignore */
2705 if (mono_gc_is_finalizer_internal_thread (thread)) {
2706 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2710 if (thread == mono_thread_internal_current ()) {
2711 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2715 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2716 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2720 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2721 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2725 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2726 if (handle == NULL) {
2727 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2731 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2732 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2733 wait->handles[wait->num]=handle;
2734 wait->threads[wait->num]=thread;
2737 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2739 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2744 /* Just ignore the rest, we can't do anything with
2751 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2753 struct wait_data *wait=(struct wait_data *)user;
2754 gsize self = GetCurrentThreadId ();
2755 MonoInternalThread *thread = value;
2758 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2761 /* The finalizer thread is not a background thread */
2762 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2763 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2765 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2769 /* printf ("A: %d\n", wait->num); */
2770 wait->handles[wait->num]=thread->handle;
2771 wait->threads[wait->num]=thread;
2774 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2775 mono_thread_internal_stop (thread);
2779 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2783 * mono_threads_set_shutting_down:
2785 * Is called by a thread that wants to shut down Mono. If the runtime is already
2786 * shutting down, the calling thread is suspended/stopped, and this function never
2790 mono_threads_set_shutting_down (void)
2792 MonoInternalThread *current_thread = mono_thread_internal_current ();
2794 mono_threads_lock ();
2796 if (shutting_down) {
2797 mono_threads_unlock ();
2799 /* Make sure we're properly suspended/stopped */
2801 EnterCriticalSection (current_thread->synch_cs);
2803 if ((current_thread->state & ThreadState_SuspendRequested) ||
2804 (current_thread->state & ThreadState_AbortRequested) ||
2805 (current_thread->state & ThreadState_StopRequested)) {
2806 LeaveCriticalSection (current_thread->synch_cs);
2807 mono_thread_execute_interruption (current_thread);
2809 current_thread->state |= ThreadState_Stopped;
2810 LeaveCriticalSection (current_thread->synch_cs);
2813 /*since we're killing the thread, unset the current domain.*/
2814 mono_domain_unset ();
2816 /* Wake up other threads potentially waiting for us */
2819 shutting_down = TRUE;
2821 /* Not really a background state change, but this will
2822 * interrupt the main thread if it is waiting for all
2823 * the other threads.
2825 SetEvent (background_change_event);
2827 mono_threads_unlock ();
2832 * mono_threads_is_shutting_down:
2834 * Returns whether a thread has commenced shutdown of Mono. Note that
2835 * if the function returns FALSE the caller must not assume that
2836 * shutdown is not in progress, because the situation might have
2837 * changed since the function returned. For that reason this function
2838 * is of very limited utility.
2841 mono_threads_is_shutting_down (void)
2843 return shutting_down;
2846 void mono_thread_manage (void)
2848 struct wait_data wait_data;
2849 struct wait_data *wait = &wait_data;
2851 memset (wait, 0, sizeof (struct wait_data));
2852 /* join each thread that's still running */
2853 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2855 mono_threads_lock ();
2857 THREAD_DEBUG (g_message("%s: No threads", __func__));
2858 mono_threads_unlock ();
2861 mono_threads_unlock ();
2864 mono_threads_lock ();
2865 if (shutting_down) {
2866 /* somebody else is shutting down */
2867 mono_threads_unlock ();
2870 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2871 mono_g_hash_table_foreach (threads, print_tids, NULL));
2873 ResetEvent (background_change_event);
2875 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2876 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2877 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2878 mono_threads_unlock ();
2880 /* Something to wait for */
2881 wait_for_tids_or_state_change (wait, INFINITE);
2883 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2884 } while(wait->num>0);
2886 mono_threads_set_shutting_down ();
2888 /* No new threads will be created after this point */
2890 mono_runtime_set_shutting_down ();
2892 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2893 mono_thread_pool_cleanup ();
2896 * Remove everything but the finalizer thread and self.
2897 * Also abort all the background threads
2900 mono_threads_lock ();
2903 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2904 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2905 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2907 mono_threads_unlock ();
2909 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2911 /* Something to wait for */
2912 wait_for_tids (wait, INFINITE);
2914 } while (wait->num > 0);
2917 * give the subthreads a chance to really quit (this is mainly needed
2918 * to get correct user and system times from getrusage/wait/time(1)).
2919 * This could be removed if we avoid pthread_detach() and use pthread_join().
2926 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2928 MonoInternalThread *thread=(MonoInternalThread *)value;
2930 if(thread->tid != (gsize)user) {
2931 /*TerminateThread (thread->handle, -1);*/
2935 void mono_thread_abort_all_other_threads (void)
2937 gsize self = GetCurrentThreadId ();
2939 mono_threads_lock ();
2940 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2941 mono_g_hash_table_size (threads));
2942 mono_g_hash_table_foreach (threads, print_tids, NULL));
2944 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2946 mono_threads_unlock ();
2950 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2952 MonoInternalThread *thread = (MonoInternalThread*)value;
2953 struct wait_data *wait = (struct wait_data*)user_data;
2957 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2959 * This needs no locking.
2961 if ((thread->state & ThreadState_Suspended) != 0 ||
2962 (thread->state & ThreadState_Stopped) != 0)
2965 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2966 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2970 wait->handles [wait->num] = handle;
2971 wait->threads [wait->num] = thread;
2977 * mono_thread_suspend_all_other_threads:
2979 * Suspend all managed threads except the finalizer thread and this thread. It is
2980 * not possible to resume them later.
2982 void mono_thread_suspend_all_other_threads (void)
2984 struct wait_data wait_data;
2985 struct wait_data *wait = &wait_data;
2987 gsize self = GetCurrentThreadId ();
2989 guint32 eventidx = 0;
2990 gboolean starting, finished;
2992 memset (wait, 0, sizeof (struct wait_data));
2994 * The other threads could be in an arbitrary state at this point, i.e.
2995 * they could be starting up, shutting down etc. This means that there could be
2996 * threads which are not even in the threads hash table yet.
3000 * First we set a barrier which will be checked by all threads before they
3001 * are added to the threads hash table, and they will exit if the flag is set.
3002 * This ensures that no threads could be added to the hash later.
3003 * We will use shutting_down as the barrier for now.
3005 g_assert (shutting_down);
3008 * We make multiple calls to WaitForMultipleObjects since:
3009 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3010 * - some threads could exit without becoming suspended
3015 * Make a copy of the hashtable since we can't do anything with
3016 * threads while threads_mutex is held.
3019 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3020 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3021 mono_threads_lock ();
3022 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3023 mono_threads_unlock ();
3025 events = g_new0 (gpointer, wait->num);
3027 /* Get the suspended events that we'll be waiting for */
3028 for (i = 0; i < wait->num; ++i) {
3029 MonoInternalThread *thread = wait->threads [i];
3030 gboolean signal_suspend = FALSE;
3032 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3033 //CloseHandle (wait->handles [i]);
3034 wait->threads [i] = NULL; /* ignore this thread in next loop */
3038 ensure_synch_cs_set (thread);
3040 EnterCriticalSection (thread->synch_cs);
3042 if (thread->suspended_event == NULL) {
3043 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3044 if (thread->suspended_event == NULL) {
3045 /* Forget this one and go on to the next */
3046 LeaveCriticalSection (thread->synch_cs);
3051 if ((thread->state & ThreadState_Suspended) != 0 ||
3052 (thread->state & ThreadState_StopRequested) != 0 ||
3053 (thread->state & ThreadState_Stopped) != 0) {
3054 LeaveCriticalSection (thread->synch_cs);
3055 CloseHandle (wait->handles [i]);
3056 wait->threads [i] = NULL; /* ignore this thread in next loop */
3060 if ((thread->state & ThreadState_SuspendRequested) == 0)
3061 signal_suspend = TRUE;
3063 events [eventidx++] = thread->suspended_event;
3065 /* Convert abort requests into suspend requests */
3066 if ((thread->state & ThreadState_AbortRequested) != 0)
3067 thread->state &= ~ThreadState_AbortRequested;
3069 thread->state |= ThreadState_SuspendRequested;
3071 LeaveCriticalSection (thread->synch_cs);
3073 /* Signal the thread to suspend */
3074 if (mono_thread_info_new_interrupt_enabled ())
3075 suspend_thread_internal (thread, TRUE);
3076 else if (signal_suspend)
3077 signal_thread_state_change (thread);
3080 /*Only wait on the suspend event if we are using the old path */
3081 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3082 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3083 for (i = 0; i < wait->num; ++i) {
3084 MonoInternalThread *thread = wait->threads [i];
3089 ensure_synch_cs_set (thread);
3091 EnterCriticalSection (thread->synch_cs);
3092 if ((thread->state & ThreadState_Suspended) != 0) {
3093 CloseHandle (thread->suspended_event);
3094 thread->suspended_event = NULL;
3096 LeaveCriticalSection (thread->synch_cs);
3100 if (eventidx <= 0) {
3102 * If there are threads which are starting up, we wait until they
3103 * are suspended when they try to register in the threads hash.
3104 * This is guaranteed to finish, since the threads which can create new
3105 * threads get suspended after a while.
3106 * FIXME: The finalizer thread can still create new threads.
3108 mono_threads_lock ();
3109 if (threads_starting_up)
3110 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3113 mono_threads_unlock ();
3125 collect_threads (gpointer key, gpointer value, gpointer user_data)
3127 MonoInternalThread *thread = (MonoInternalThread*)value;
3128 struct wait_data *wait = (struct wait_data*)user_data;
3131 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3132 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3136 wait->handles [wait->num] = handle;
3137 wait->threads [wait->num] = thread;
3142 static gboolean thread_dump_requested;
3144 static G_GNUC_UNUSED gboolean
3145 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3147 GString *p = (GString*)data;
3148 MonoMethod *method = NULL;
3150 method = frame->ji->method;
3153 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3154 g_string_append_printf (p, " %s\n", location);
3157 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3163 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3165 GString* text = g_string_new (0);
3167 GError *error = NULL;
3170 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3172 g_string_append_printf (text, "\n\"%s\"", name);
3175 else if (thread->threadpool_thread)
3176 g_string_append (text, "\n\"<threadpool thread>\"");
3178 g_string_append (text, "\n\"<unnamed thread>\"");
3181 /* This no longer works with remote unwinding */
3183 wapi_desc = wapi_current_thread_desc ();
3184 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3189 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3190 mono_thread_info_resume (mono_thread_info_get_tid (info));
3192 fprintf (stdout, "%s", text->str);
3194 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3195 OutputDebugStringA(text->str);
3198 g_string_free (text, TRUE);
3203 dump_thread (gpointer key, gpointer value, gpointer user)
3205 MonoInternalThread *thread = (MonoInternalThread *)value;
3206 MonoThreadInfo *info;
3208 if (thread == mono_thread_internal_current ())
3212 FIXME This still can hang if we stop a thread during malloc.
3213 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3214 that takes a callback and runs it with the target suspended.
3215 We probably should loop a bit around trying to get it to either managed code
3218 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3223 print_thread_dump (thread, info);
3227 mono_threads_perform_thread_dump (void)
3229 if (!thread_dump_requested)
3232 printf ("Full thread dump:\n");
3235 * Make a copy of the hashtable since we can't do anything with
3236 * threads while threads_mutex is held.
3238 mono_threads_lock ();
3239 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3240 mono_threads_unlock ();
3242 thread_dump_requested = FALSE;
3246 * mono_threads_request_thread_dump:
3248 * Ask all threads except the current to print their stacktrace to stdout.
3251 mono_threads_request_thread_dump (void)
3253 struct wait_data wait_data;
3254 struct wait_data *wait = &wait_data;
3257 /*The new thread dump code runs out of the finalizer thread. */
3258 if (mono_thread_info_new_interrupt_enabled ()) {
3259 thread_dump_requested = TRUE;
3260 mono_gc_finalize_notify ();
3265 memset (wait, 0, sizeof (struct wait_data));
3268 * Make a copy of the hashtable since we can't do anything with
3269 * threads while threads_mutex is held.
3271 mono_threads_lock ();
3272 mono_g_hash_table_foreach (threads, collect_threads, wait);
3273 mono_threads_unlock ();
3275 for (i = 0; i < wait->num; ++i) {
3276 MonoInternalThread *thread = wait->threads [i];
3278 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3279 (thread != mono_thread_internal_current ()) &&
3280 !thread->thread_dump_requested) {
3281 thread->thread_dump_requested = TRUE;
3283 signal_thread_state_change (thread);
3286 CloseHandle (wait->handles [i]);
3292 gint allocated; /* +1 so that refs [allocated] == NULL */
3296 typedef struct ref_stack RefStack;
3299 ref_stack_new (gint initial_size)
3303 initial_size = MAX (initial_size, 16) + 1;
3304 rs = g_new0 (RefStack, 1);
3305 rs->refs = g_new0 (gpointer, initial_size);
3306 rs->allocated = initial_size;
3311 ref_stack_destroy (gpointer ptr)
3322 ref_stack_push (RefStack *rs, gpointer ptr)
3324 g_assert (rs != NULL);
3326 if (rs->bottom >= rs->allocated) {
3327 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3328 rs->allocated <<= 1;
3329 rs->refs [rs->allocated] = NULL;
3331 rs->refs [rs->bottom++] = ptr;
3335 ref_stack_pop (RefStack *rs)
3337 if (rs == NULL || rs->bottom == 0)
3341 rs->refs [rs->bottom] = NULL;
3345 ref_stack_find (RefStack *rs, gpointer ptr)
3352 for (refs = rs->refs; refs && *refs; refs++) {
3360 * mono_thread_push_appdomain_ref:
3362 * Register that the current thread may have references to objects in domain
3363 * @domain on its stack. Each call to this function should be paired with a
3364 * call to pop_appdomain_ref.
3367 mono_thread_push_appdomain_ref (MonoDomain *domain)
3369 MonoInternalThread *thread = mono_thread_internal_current ();
3372 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3373 SPIN_LOCK (thread->lock_thread_id);
3374 if (thread->appdomain_refs == NULL)
3375 thread->appdomain_refs = ref_stack_new (16);
3376 ref_stack_push (thread->appdomain_refs, domain);
3377 SPIN_UNLOCK (thread->lock_thread_id);
3382 mono_thread_pop_appdomain_ref (void)
3384 MonoInternalThread *thread = mono_thread_internal_current ();
3387 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3388 SPIN_LOCK (thread->lock_thread_id);
3389 ref_stack_pop (thread->appdomain_refs);
3390 SPIN_UNLOCK (thread->lock_thread_id);
3395 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3398 SPIN_LOCK (thread->lock_thread_id);
3399 res = ref_stack_find (thread->appdomain_refs, domain);
3400 SPIN_UNLOCK (thread->lock_thread_id);
3405 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3407 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3410 typedef struct abort_appdomain_data {
3411 struct wait_data wait;
3413 } abort_appdomain_data;
3416 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3418 MonoInternalThread *thread = (MonoInternalThread*)value;
3419 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3420 MonoDomain *domain = data->domain;
3422 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3423 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3425 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3426 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3429 data->wait.handles [data->wait.num] = handle;
3430 data->wait.threads [data->wait.num] = thread;
3433 /* Just ignore the rest, we can't do anything with
3441 * mono_threads_abort_appdomain_threads:
3443 * Abort threads which has references to the given appdomain.
3446 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3448 abort_appdomain_data user_data;
3450 int orig_timeout = timeout;
3453 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3455 start_time = mono_msec_ticks ();
3457 mono_threads_lock ();
3459 user_data.domain = domain;
3460 user_data.wait.num = 0;
3461 /* This shouldn't take any locks */
3462 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3463 mono_threads_unlock ();
3465 if (user_data.wait.num > 0) {
3466 /* Abort the threads outside the threads lock */
3467 for (i = 0; i < user_data.wait.num; ++i)
3468 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3471 * We should wait for the threads either to abort, or to leave the
3472 * domain. We can't do the latter, so we wait with a timeout.
3474 wait_for_tids (&user_data.wait, 100);
3477 /* Update remaining time */
3478 timeout -= mono_msec_ticks () - start_time;
3479 start_time = mono_msec_ticks ();
3481 if (orig_timeout != -1 && timeout < 0)
3484 while (user_data.wait.num > 0);
3486 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3492 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3494 MonoInternalThread *thread = (MonoInternalThread*)value;
3495 MonoDomain *domain = (MonoDomain*)user_data;
3498 /* No locking needed here */
3499 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3501 if (thread->cached_culture_info) {
3502 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3503 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3504 if (obj && obj->vtable->domain == domain)
3505 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3511 * mono_threads_clear_cached_culture:
3513 * Clear the cached_current_culture from all threads if it is in the
3517 mono_threads_clear_cached_culture (MonoDomain *domain)
3519 mono_threads_lock ();
3520 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3521 mono_threads_unlock ();
3525 * mono_thread_get_undeniable_exception:
3527 * Return an exception which needs to be raised when leaving a catch clause.
3528 * This is used for undeniable exception propagation.
3531 mono_thread_get_undeniable_exception (void)
3533 MonoInternalThread *thread = mono_thread_internal_current ();
3535 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3537 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3538 * exception if the thread no longer references a dying appdomain.
3540 thread->abort_exc->trace_ips = NULL;
3541 thread->abort_exc->stack_trace = NULL;
3542 return thread->abort_exc;
3548 #if MONO_SMALL_CONFIG
3549 #define NUM_STATIC_DATA_IDX 4
3550 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3554 #define NUM_STATIC_DATA_IDX 8
3555 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3556 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3560 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3563 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3566 gpointer *static_data = addr;
3567 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3570 if (!static_data [i])
3572 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3573 ptr = static_data [i];
3574 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3575 uintptr_t bmap = static_reference_bitmaps [i][j];
3578 if ((bmap & 1) && *p) {
3589 * mono_alloc_static_data
3591 * Allocate memory blocks for storing threads or context static data
3594 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3596 guint idx = (offset >> 24) - 1;
3599 gpointer* static_data = *static_data_ptr;
3601 static void* tls_desc = NULL;
3602 if (mono_gc_user_markers_supported () && !tls_desc)
3603 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3604 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3605 *static_data_ptr = static_data;
3606 static_data [0] = static_data;
3609 for (i = 1; i <= idx; ++i) {
3610 if (static_data [i])
3612 if (mono_gc_user_markers_supported () && threadlocal)
3613 static_data [i] = g_malloc0 (static_data_size [i]);
3615 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3620 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3623 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3624 if (!static_data [i])
3626 if (mono_gc_user_markers_supported () && threadlocal)
3627 g_free (static_data [i]);
3629 mono_gc_free_fixed (static_data [i]);
3631 mono_gc_free_fixed (static_data);
3635 * mono_init_static_data_info
3637 * Initializes static data counters
3639 static void mono_init_static_data_info (StaticDataInfo *static_data)
3641 static_data->idx = 0;
3642 static_data->offset = 0;
3643 static_data->freelist = NULL;
3647 * mono_alloc_static_data_slot
3649 * Generates an offset for static data. static_data contains the counters
3650 * used to generate it.
3653 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3657 if (!static_data->idx && !static_data->offset) {
3659 * we use the first chunk of the first allocation also as
3660 * an array for the rest of the data
3662 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3664 static_data->offset += align - 1;
3665 static_data->offset &= ~(align - 1);
3666 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3667 static_data->idx ++;
3668 g_assert (size <= static_data_size [static_data->idx]);
3669 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3670 static_data->offset = 0;
3672 offset = static_data->offset | ((static_data->idx + 1) << 24);
3673 static_data->offset += size;
3678 * ensure thread static fields already allocated are valid for thread
3679 * This function is called when a thread is created or on thread attach.
3682 thread_adjust_static_data (MonoInternalThread *thread)
3686 mono_threads_lock ();
3687 if (thread_static_info.offset || thread_static_info.idx > 0) {
3688 /* get the current allocated size */
3689 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3690 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3692 mono_threads_unlock ();
3696 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3698 MonoInternalThread *thread = value;
3699 guint32 offset = GPOINTER_TO_UINT (user);
3701 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3704 static MonoThreadDomainTls*
3705 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3707 MonoThreadDomainTls* prev = NULL;
3708 MonoThreadDomainTls* tmp = static_data->freelist;
3710 if (tmp->size == size) {
3712 prev->next = tmp->next;
3714 static_data->freelist = tmp->next;
3723 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3726 int idx = (offset >> 24) - 1;
3728 if (!static_reference_bitmaps [idx])
3729 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3730 rb = static_reference_bitmaps [idx];
3732 offset /= sizeof (gpointer);
3733 /* offset is now the bitmap offset */
3734 for (i = 0; i < numbits; ++i) {
3735 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3736 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3741 clear_reference_bitmap (guint32 offset, guint32 size)
3743 int idx = (offset >> 24) - 1;
3745 rb = static_reference_bitmaps [idx];
3747 offset /= sizeof (gpointer);
3748 size /= sizeof (gpointer);
3750 /* offset is now the bitmap offset */
3751 for (; offset < size; ++offset)
3752 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3756 * The offset for a special static variable is composed of three parts:
3757 * a bit that indicates the type of static data (0:thread, 1:context),
3758 * an index in the array of chunks of memory for the thread (thread->static_data)
3759 * and an offset in that chunk of mem. This allows allocating less memory in the
3764 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3767 if (static_type == SPECIAL_STATIC_THREAD) {
3768 MonoThreadDomainTls *item;
3769 mono_threads_lock ();
3770 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3771 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3773 offset = item->offset;
3776 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3778 update_tls_reference_bitmap (offset, bitmap, numbits);
3779 /* This can be called during startup */
3780 if (threads != NULL)
3781 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3782 mono_threads_unlock ();
3784 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3785 mono_contexts_lock ();
3786 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3787 mono_contexts_unlock ();
3788 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3794 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3796 /* The high bit means either thread (0) or static (1) data. */
3798 guint32 static_type = (offset & 0x80000000);
3801 offset &= 0x7fffffff;
3802 idx = (offset >> 24) - 1;
3804 if (static_type == 0) {
3805 return get_thread_static_data (thread, offset);
3807 /* Allocate static data block under demand, since we don't have a list
3810 MonoAppContext *context = mono_context_get ();
3811 if (!context->static_data || !context->static_data [idx]) {
3812 mono_contexts_lock ();
3813 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3814 mono_contexts_unlock ();
3816 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3821 mono_get_special_static_data (guint32 offset)
3823 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3832 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3834 MonoInternalThread *thread = value;
3835 TlsOffsetSize *data = user;
3836 int idx = (data->offset >> 24) - 1;
3839 if (!thread->static_data || !thread->static_data [idx])
3841 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3842 mono_gc_bzero (ptr, data->size);
3846 do_free_special_slot (guint32 offset, guint32 size)
3848 guint32 static_type = (offset & 0x80000000);
3849 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3850 if (static_type == 0) {
3852 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3853 data.offset = offset & 0x7fffffff;
3855 clear_reference_bitmap (data.offset, data.size);
3856 if (threads != NULL)
3857 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3858 item->offset = offset;
3861 if (!mono_runtime_is_shutting_down ()) {
3862 item->next = thread_static_info.freelist;
3863 thread_static_info.freelist = item;
3865 /* We could be called during shutdown after mono_thread_cleanup () is called */
3869 /* FIXME: free context static data as well */
3874 do_free_special (gpointer key, gpointer value, gpointer data)
3876 MonoClassField *field = key;
3877 guint32 offset = GPOINTER_TO_UINT (value);
3880 size = mono_type_size (field->type, &align);
3881 do_free_special_slot (offset, size);
3885 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3887 mono_threads_lock ();
3888 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3889 mono_threads_unlock ();
3893 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3895 mono_threads_lock ();
3896 do_free_special_slot (offset, size);
3897 mono_threads_unlock ();
3901 * allocates room in the thread local area for storing an instance of the struct type
3902 * the allocation is kept track of in domain->tlsrec_list.
3905 mono_thread_alloc_tls (MonoReflectionType *type)
3907 MonoDomain *domain = mono_domain_get ();
3909 MonoTlsDataRecord *tlsrec;
3912 gsize default_bitmap [4] = {0};
3913 uint32_t tls_offset;
3917 klass = mono_class_from_mono_type (type->type);
3918 /* TlsDatum is a struct, so we subtract the object header size offset */
3919 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3920 size = mono_type_size (type->type, &align);
3921 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3922 if (bitmap != default_bitmap)
3924 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3925 tlsrec->tls_offset = tls_offset;
3926 tlsrec->size = size;
3927 mono_domain_lock (domain);
3928 tlsrec->next = domain->tlsrec_list;
3929 domain->tlsrec_list = tlsrec;
3930 mono_domain_unlock (domain);
3935 mono_thread_destroy_tls (uint32_t tls_offset)
3937 MonoTlsDataRecord *prev = NULL;
3938 MonoTlsDataRecord *cur;
3940 MonoDomain *domain = mono_domain_get ();
3941 mono_domain_lock (domain);
3942 cur = domain->tlsrec_list;
3944 if (cur->tls_offset == tls_offset) {
3946 prev->next = cur->next;
3948 domain->tlsrec_list = cur->next;
3956 mono_domain_unlock (domain);
3958 mono_special_static_data_free_slot (tls_offset, size);
3962 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3965 mono_thread_destroy_domain_tls (MonoDomain *domain)
3967 while (domain->tlsrec_list)
3968 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3971 static MonoClassField *local_slots = NULL;
3974 /* local tls data to get locals_slot from a thread */
3977 /* index in the locals_slot array */
3982 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3984 LocalSlotID *sid = user_data;
3985 MonoInternalThread *thread = (MonoInternalThread*)value;
3986 MonoArray *slots_array;
3988 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3989 * it is for the right domain, so we need to check if it is allocated an initialized
3990 * for the current thread.
3992 /*g_print ("handling thread %p\n", thread);*/
3993 if (!thread->static_data || !thread->static_data [sid->idx])
3995 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3996 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3998 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4002 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4010 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4012 g_warning ("local_slots field not found in Thread class");
4016 domain = mono_domain_get ();
4017 mono_domain_lock (domain);
4018 if (domain->special_static_fields)
4019 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4020 mono_domain_unlock (domain);
4023 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4024 sid.offset = GPOINTER_TO_UINT (addr);
4025 sid.offset &= 0x7fffffff;
4026 sid.idx = (sid.offset >> 24) - 1;
4027 mono_threads_lock ();
4028 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4029 mono_threads_unlock ();
4031 /* FIXME: clear the slot for MonoAppContexts, too */
4036 static void CALLBACK dummy_apc (ULONG_PTR param)
4040 static guint32 dummy_apc (gpointer param)
4047 * mono_thread_execute_interruption
4049 * Performs the operation that the requested thread state requires (abort,
4052 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4054 ensure_synch_cs_set (thread);
4056 EnterCriticalSection (thread->synch_cs);
4058 /* MonoThread::interruption_requested can only be changed with atomics */
4059 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4060 /* this will consume pending APC calls */
4061 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4062 InterlockedDecrement (&thread_interruption_requested);
4064 /* Clear the interrupted flag of the thread so it can wait again */
4065 wapi_clear_interruption ();
4069 if ((thread->state & ThreadState_AbortRequested) != 0) {
4070 LeaveCriticalSection (thread->synch_cs);
4071 if (thread->abort_exc == NULL) {
4073 * This might be racy, but it has to be called outside the lock
4074 * since it calls managed code.
4076 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4078 return thread->abort_exc;
4080 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4081 self_suspend_internal (thread);
4084 else if ((thread->state & ThreadState_StopRequested) != 0) {
4085 /* FIXME: do this through the JIT? */
4087 LeaveCriticalSection (thread->synch_cs);
4089 mono_thread_exit ();
4091 } else if (thread->pending_exception) {
4094 exc = thread->pending_exception;
4095 thread->pending_exception = NULL;
4097 LeaveCriticalSection (thread->synch_cs);
4099 } else if (thread->thread_interrupt_requested) {
4101 thread->thread_interrupt_requested = FALSE;
4102 LeaveCriticalSection (thread->synch_cs);
4104 return(mono_get_exception_thread_interrupted ());
4107 LeaveCriticalSection (thread->synch_cs);
4113 * mono_thread_request_interruption
4115 * A signal handler can call this method to request the interruption of a
4116 * thread. The result of the interruption will depend on the current state of
4117 * the thread. If the result is an exception that needs to be throw, it is
4118 * provided as return value.
4121 mono_thread_request_interruption (gboolean running_managed)
4123 MonoInternalThread *thread = mono_thread_internal_current ();
4125 /* The thread may already be stopping */
4130 if (thread->interrupt_on_stop &&
4131 thread->state & ThreadState_StopRequested &&
4132 thread->state & ThreadState_Background)
4136 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4138 InterlockedIncrement (&thread_interruption_requested);
4140 if (!running_managed || is_running_protected_wrapper ()) {
4141 /* Can't stop while in unmanaged code. Increase the global interruption
4142 request count. When exiting the unmanaged method the count will be
4143 checked and the thread will be interrupted. */
4146 if (mono_thread_notify_pending_exc_fn && !running_managed)
4147 /* The JIT will notify the thread about the interruption */
4148 /* This shouldn't take any locks */
4149 mono_thread_notify_pending_exc_fn ();
4151 /* this will awake the thread if it is in WaitForSingleObject
4153 /* Our implementation of this function ignores the func argument */
4154 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4158 return mono_thread_execute_interruption (thread);
4162 /*This function should be called by a thread after it has exited all of
4163 * its handle blocks at interruption time.*/
4165 mono_thread_resume_interruption (void)
4167 MonoInternalThread *thread = mono_thread_internal_current ();
4168 gboolean still_aborting;
4170 /* The thread may already be stopping */
4174 ensure_synch_cs_set (thread);
4175 EnterCriticalSection (thread->synch_cs);
4176 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4177 LeaveCriticalSection (thread->synch_cs);
4179 /*This can happen if the protected block called Thread::ResetAbort*/
4180 if (!still_aborting)
4183 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4185 InterlockedIncrement (&thread_interruption_requested);
4188 wapi_self_interrupt ();
4190 return mono_thread_execute_interruption (thread);
4193 gboolean mono_thread_interruption_requested ()
4195 if (thread_interruption_requested) {
4196 MonoInternalThread *thread = mono_thread_internal_current ();
4197 /* The thread may already be stopping */
4199 return (thread->interruption_requested);
4204 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4206 MonoInternalThread *thread = mono_thread_internal_current ();
4208 /* The thread may already be stopping */
4212 mono_debugger_check_interruption ();
4214 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4215 MonoException* exc = mono_thread_execute_interruption (thread);
4216 if (exc) mono_raise_exception (exc);
4221 * Performs the interruption of the current thread, if one has been requested,
4222 * and the thread is not running a protected wrapper.
4224 void mono_thread_interruption_checkpoint ()
4226 mono_thread_interruption_checkpoint_request (FALSE);
4230 * Performs the interruption of the current thread, if one has been requested.
4232 void mono_thread_force_interruption_checkpoint ()
4234 mono_thread_interruption_checkpoint_request (TRUE);
4238 * mono_thread_get_and_clear_pending_exception:
4240 * Return any pending exceptions for the current thread and clear it as a side effect.
4243 mono_thread_get_and_clear_pending_exception (void)
4245 MonoInternalThread *thread = mono_thread_internal_current ();
4247 /* The thread may already be stopping */
4251 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4252 return mono_thread_execute_interruption (thread);
4255 if (thread->pending_exception) {
4256 MonoException *exc = thread->pending_exception;
4258 thread->pending_exception = NULL;
4266 * mono_set_pending_exception:
4268 * Set the pending exception of the current thread to EXC.
4269 * The exception will be thrown when execution returns to managed code.
4272 mono_set_pending_exception (MonoException *exc)
4274 MonoInternalThread *thread = mono_thread_internal_current ();
4276 /* The thread may already be stopping */
4280 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4282 mono_thread_request_interruption (FALSE);
4286 * mono_thread_interruption_request_flag:
4288 * Returns the address of a flag that will be non-zero if an interruption has
4289 * been requested for a thread. The thread to interrupt may not be the current
4290 * thread, so an additional call to mono_thread_interruption_requested() or
4291 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4294 gint32* mono_thread_interruption_request_flag ()
4296 return &thread_interruption_requested;
4300 mono_thread_init_apartment_state (void)
4303 MonoInternalThread* thread = mono_thread_internal_current ();
4305 /* Positive return value indicates success, either
4306 * S_OK if this is first CoInitialize call, or
4307 * S_FALSE if CoInitialize already called, but with same
4308 * threading model. A negative value indicates failure,
4309 * probably due to trying to change the threading model.
4311 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4312 ? COINIT_APARTMENTTHREADED
4313 : COINIT_MULTITHREADED) < 0) {
4314 thread->apartment_state = ThreadApartmentState_Unknown;
4320 mono_thread_cleanup_apartment_state (void)
4323 MonoInternalThread* thread = mono_thread_internal_current ();
4325 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4332 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4334 ensure_synch_cs_set (thread);
4336 EnterCriticalSection (thread->synch_cs);
4337 thread->state |= state;
4338 LeaveCriticalSection (thread->synch_cs);
4342 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4344 ensure_synch_cs_set (thread);
4346 EnterCriticalSection (thread->synch_cs);
4347 thread->state &= ~state;
4348 LeaveCriticalSection (thread->synch_cs);
4352 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4354 gboolean ret = FALSE;
4356 ensure_synch_cs_set (thread);
4358 EnterCriticalSection (thread->synch_cs);
4360 if ((thread->state & test) != 0) {
4364 LeaveCriticalSection (thread->synch_cs);
4369 //static MonoClassField *execution_context_field;
4372 get_execution_context_addr (void)
4374 MonoDomain *domain = mono_domain_get ();
4375 guint32 offset = domain->execution_context_field_offset;
4378 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4381 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4383 mono_domain_lock (domain);
4384 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4385 mono_domain_unlock (domain);
4388 domain->execution_context_field_offset = offset;
4391 return (MonoObject**) mono_get_special_static_data (offset);
4395 mono_thread_get_execution_context (void)
4397 return *get_execution_context_addr ();
4401 mono_thread_set_execution_context (MonoObject *ec)
4403 *get_execution_context_addr () = ec;
4406 static gboolean has_tls_get = FALSE;
4409 mono_runtime_set_has_tls_get (gboolean val)
4415 mono_runtime_has_tls_get (void)
4421 mono_thread_kill (MonoInternalThread *thread, int signal)
4424 /* Win32 uses QueueUserAPC and callers of this are guarded */
4425 g_assert_not_reached ();
4427 # ifdef PTHREAD_POINTER_ID
4428 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4430 # ifdef PLATFORM_ANDROID
4431 if (thread->android_tid != 0) {
4433 int old_errno = errno;
4435 ret = tkill ((pid_t) thread->android_tid, signal);
4444 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4446 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4453 self_interrupt_thread (void *_unused)
4455 MonoThreadInfo *info = mono_thread_info_current ();
4456 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4457 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4458 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4459 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4463 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4467 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4471 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4473 MonoJitInfo **dest = data;
4479 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4481 MonoJitInfo *ji = NULL;
4484 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4489 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4492 MonoThreadInfo *info = NULL;
4493 gboolean protected_wrapper;
4494 gboolean running_managed;
4496 if (!mono_thread_info_new_interrupt_enabled ()) {
4497 signal_thread_state_change (thread);
4502 FIXME this is insanely broken, it doesn't cause interruption to happen
4503 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4505 if (thread == mono_thread_internal_current ()) {
4506 /* Do it synchronously */
4507 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4509 mono_raise_exception (exc);
4511 wapi_interrupt_thread (thread->handle);
4516 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4517 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4521 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4522 mono_thread_info_resume (mono_thread_info_get_tid (info));
4526 /*someone is already interrupting it*/
4527 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4528 mono_thread_info_resume (mono_thread_info_get_tid (info));
4531 InterlockedIncrement (&thread_interruption_requested);
4533 ji = mono_thread_info_get_last_managed (info);
4534 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4535 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4537 if (!protected_wrapper && running_managed) {
4538 /*We are in managed code*/
4539 /*Set the thread to call */
4540 if (install_async_abort)
4541 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4542 mono_thread_info_resume (mono_thread_info_get_tid (info));
4544 gpointer interrupt_handle;
4546 * This will cause waits to be broken.
4547 * It will also prevent the thread from entering a wait, so if the thread returns
4548 * from the wait before it receives the abort signal, it will just spin in the wait
4549 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4553 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4555 mono_thread_info_resume (mono_thread_info_get_tid (info));
4557 wapi_finish_interrupt_thread (interrupt_handle);
4560 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4564 transition_to_suspended (MonoInternalThread *thread)
4566 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4567 g_assert (0); /*FIXME we should not reach this */
4568 /*Make sure we balance the suspend count.*/
4569 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4571 thread->state &= ~ThreadState_SuspendRequested;
4572 thread->state |= ThreadState_Suspended;
4574 LeaveCriticalSection (thread->synch_cs);
4578 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4580 if (!mono_thread_info_new_interrupt_enabled ()) {
4581 signal_thread_state_change (thread);
4585 EnterCriticalSection (thread->synch_cs);
4586 if (thread == mono_thread_internal_current ()) {
4587 transition_to_suspended (thread);
4588 mono_thread_info_self_suspend ();
4590 MonoThreadInfo *info;
4592 gboolean protected_wrapper;
4593 gboolean running_managed;
4595 /*A null info usually means the thread is already dead. */
4596 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt)))
4599 ji = mono_thread_info_get_last_managed (info);
4600 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4601 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4603 if (running_managed && !protected_wrapper) {
4604 transition_to_suspended (thread);
4606 gpointer interrupt_handle;
4608 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4609 InterlockedIncrement (&thread_interruption_requested);
4612 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4614 mono_thread_info_resume (mono_thread_info_get_tid (info));
4617 wapi_finish_interrupt_thread (interrupt_handle);
4619 LeaveCriticalSection (thread->synch_cs);
4624 /*This is called with @thread synch_cs held and it must release it*/
4626 self_suspend_internal (MonoInternalThread *thread)
4628 if (!mono_thread_info_new_interrupt_enabled ()) {
4629 thread->state &= ~ThreadState_SuspendRequested;
4630 thread->state |= ThreadState_Suspended;
4631 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4632 if (thread->suspend_event == NULL) {
4633 LeaveCriticalSection (thread->synch_cs);
4636 if (thread->suspended_event)
4637 SetEvent (thread->suspended_event);
4639 LeaveCriticalSection (thread->synch_cs);
4641 if (shutting_down) {
4642 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4647 WaitForSingleObject (thread->suspend_event, INFINITE);
4649 EnterCriticalSection (thread->synch_cs);
4651 CloseHandle (thread->suspend_event);
4652 thread->suspend_event = NULL;
4653 thread->state &= ~ThreadState_Suspended;
4655 /* The thread that requested the resume will have replaced this event
4656 * and will be waiting for it
4658 SetEvent (thread->resume_event);
4660 LeaveCriticalSection (thread->synch_cs);
4664 transition_to_suspended (thread);
4665 mono_thread_info_self_suspend ();
4668 /*This is called with @thread synch_cs held and it must release it*/
4670 resume_thread_internal (MonoInternalThread *thread)
4672 if (!mono_thread_info_new_interrupt_enabled ()) {
4673 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4674 if (thread->resume_event == NULL) {
4675 LeaveCriticalSection (thread->synch_cs);
4679 /* Awake the thread */
4680 SetEvent (thread->suspend_event);
4682 LeaveCriticalSection (thread->synch_cs);
4684 /* Wait for the thread to awake */
4685 WaitForSingleObject (thread->resume_event, INFINITE);
4686 CloseHandle (thread->resume_event);
4687 thread->resume_event = NULL;
4691 LeaveCriticalSection (thread->synch_cs);
4692 /* Awake the thread */
4693 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4695 EnterCriticalSection (thread->synch_cs);
4696 thread->state &= ~ThreadState_Suspended;
4697 LeaveCriticalSection (thread->synch_cs);