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/metadata/runtime.h>
37 #include <mono/io-layer/io-layer.h>
39 #include <mono/io-layer/threads.h>
41 #include <mono/metadata/object-internals.h>
42 #include <mono/metadata/mono-debug-debugger.h>
43 #include <mono/utils/mono-compiler.h>
44 #include <mono/utils/mono-mmap.h>
45 #include <mono/utils/mono-membar.h>
46 #include <mono/utils/mono-time.h>
47 #include <mono/utils/mono-threads.h>
48 #include <mono/utils/hazard-pointer.h>
49 #include <mono/utils/mono-tls.h>
51 #include <mono/metadata/gc-internal.h>
53 #ifdef PLATFORM_ANDROID
56 extern int tkill (pid_t tid, int signal);
59 #if defined(PLATFORM_MACOSX) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
60 void *pthread_get_stackaddr_np(pthread_t);
61 size_t pthread_get_stacksize_np(pthread_t);
64 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_DEBUG(a)
66 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
67 #define THREAD_WAIT_DEBUG(a)
68 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
69 #define LIBGC_DEBUG(a)
71 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
72 #define SPIN_LOCK(i) do { \
73 if (SPIN_TRYLOCK (i)) \
77 #define SPIN_UNLOCK(i) i = 0
79 /* Provide this for systems with glib < 2.6 */
80 #ifndef G_GSIZE_FORMAT
81 # if GLIB_SIZEOF_LONG == 8
82 # define G_GSIZE_FORMAT "lu"
84 # define G_GSIZE_FORMAT "u"
90 guint32 (*func)(void *);
106 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
107 struct _MonoThreadDomainTls {
108 MonoThreadDomainTls *next;
116 MonoThreadDomainTls *freelist;
119 /* Number of cached culture objects in the MonoThread->cached_culture_info array
120 * (per-type): we use the first NUM entries for CultureInfo and the last for
121 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
123 #define NUM_CACHED_CULTURES 4
124 #define CULTURES_START_IDX 0
125 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
127 /* Controls access to the 'threads' hash table */
128 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
129 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
130 static CRITICAL_SECTION threads_mutex;
132 /* Controls access to context static data */
133 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
134 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
135 static CRITICAL_SECTION contexts_mutex;
137 /* Holds current status of static data heap */
138 static StaticDataInfo thread_static_info;
139 static StaticDataInfo context_static_info;
141 /* The hash of existing threads (key is thread ID, value is
142 * MonoInternalThread*) that need joining before exit
144 static MonoGHashTable *threads=NULL;
147 * Threads which are starting up and they are not in the 'threads' hash yet.
148 * When handle_store is called for a thread, it will be removed from this hash table.
149 * Protected by mono_threads_lock ().
151 static MonoGHashTable *threads_starting_up = NULL;
153 /* Maps a MonoThread to its start argument */
154 /* Protected by mono_threads_lock () */
155 static MonoGHashTable *thread_start_args = NULL;
157 /* The TLS key that holds the MonoObject assigned to each thread */
158 static MonoNativeTlsKey current_object_key;
160 #ifdef MONO_HAVE_FAST_TLS
161 /* we need to use both the Tls* functions and __thread because
162 * the gc needs to see all the threads
164 MONO_FAST_TLS_DECLARE(tls_current_object);
165 #define SET_CURRENT_OBJECT(x) do { \
166 MONO_FAST_TLS_SET (tls_current_object, x); \
167 mono_native_tls_set_value (current_object_key, x); \
169 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
171 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
172 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
175 /* function called at thread start */
176 static MonoThreadStartCB mono_thread_start_cb = NULL;
178 /* function called at thread attach */
179 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
181 /* function called at thread cleanup */
182 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
184 /* function called to notify the runtime about a pending exception on the current thread */
185 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
187 /* The default stack size for each thread */
188 static guint32 default_stacksize = 0;
189 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
191 static void thread_adjust_static_data (MonoInternalThread *thread);
192 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
193 static void mono_init_static_data_info (StaticDataInfo *static_data);
194 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
195 static gboolean mono_thread_resume (MonoInternalThread* thread);
196 static void mono_thread_start (MonoThread *thread);
197 static void signal_thread_state_change (MonoInternalThread *thread);
198 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
199 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
200 static void self_suspend_internal (MonoInternalThread *thread);
201 static gboolean resume_thread_internal (MonoInternalThread *thread);
203 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
204 static void ref_stack_destroy (gpointer rs);
206 /* Spin lock for InterlockedXXX 64 bit functions */
207 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
208 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
209 static CRITICAL_SECTION interlocked_mutex;
211 /* global count of thread interruptions requested */
212 static gint32 thread_interruption_requested = 0;
214 /* Event signaled when a thread changes its background mode */
215 static HANDLE background_change_event;
217 static gboolean shutting_down = FALSE;
219 static gint32 managed_thread_id_counter = 0;
222 get_next_managed_thread_id (void)
224 return InterlockedIncrement (&managed_thread_id_counter);
228 mono_thread_get_tls_key (void)
230 return current_object_key;
234 mono_thread_get_tls_offset (void)
237 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
241 /* handle_store() and handle_remove() manage the array of threads that
242 * still need to be waited for when the main thread exits.
244 * If handle_store() returns FALSE the thread must not be started
245 * because Mono is shutting down.
247 static gboolean handle_store(MonoThread *thread)
249 mono_threads_lock ();
251 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
253 if (threads_starting_up)
254 mono_g_hash_table_remove (threads_starting_up, thread);
257 mono_threads_unlock ();
262 MONO_GC_REGISTER_ROOT_FIXED (threads);
263 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
266 /* We don't need to duplicate thread->handle, because it is
267 * only closed when the thread object is finalized by the GC.
269 g_assert (thread->internal_thread);
270 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
271 thread->internal_thread);
273 mono_threads_unlock ();
278 static gboolean handle_remove(MonoInternalThread *thread)
281 gsize tid = thread->tid;
283 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
285 mono_threads_lock ();
288 /* We have to check whether the thread object for the
289 * tid is still the same in the table because the
290 * thread might have been destroyed and the tid reused
291 * in the meantime, in which case the tid would be in
292 * the table, but with another thread object.
294 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
295 mono_g_hash_table_remove (threads, (gpointer)tid);
304 mono_threads_unlock ();
306 /* Don't close the handle here, wait for the object finalizer
307 * to do it. Otherwise, the following race condition applies:
309 * 1) Thread exits (and handle_remove() closes the handle)
311 * 2) Some other handle is reassigned the same slot
313 * 3) Another thread tries to join the first thread, and
314 * blocks waiting for the reassigned handle to be signalled
315 * (which might never happen). This is possible, because the
316 * thread calling Join() still has a reference to the first
322 static void ensure_synch_cs_set (MonoInternalThread *thread)
324 CRITICAL_SECTION *synch_cs;
326 if (thread->synch_cs != NULL) {
330 synch_cs = g_new0 (CRITICAL_SECTION, 1);
331 InitializeCriticalSection (synch_cs);
333 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
334 synch_cs, NULL) != NULL) {
335 /* Another thread must have installed this CS */
336 DeleteCriticalSection (synch_cs);
342 * NOTE: this function can be called also for threads different from the current one:
343 * make sure no code called from it will ever assume it is run on the thread that is
344 * getting cleaned up.
346 static void thread_cleanup (MonoInternalThread *thread)
348 g_assert (thread != NULL);
350 if (thread->abort_state_handle) {
351 mono_gchandle_free (thread->abort_state_handle);
352 thread->abort_state_handle = 0;
354 thread->abort_exc = NULL;
355 thread->current_appcontext = NULL;
358 * This is necessary because otherwise we might have
359 * cross-domain references which will not get cleaned up when
360 * the target domain is unloaded.
362 if (thread->cached_culture_info) {
364 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
365 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
368 ensure_synch_cs_set (thread);
370 EnterCriticalSection (thread->synch_cs);
372 thread->state |= ThreadState_Stopped;
373 thread->state &= ~ThreadState_Background;
375 LeaveCriticalSection (thread->synch_cs);
378 An interruption request has leaked to cleanup. Adjust the global counter.
380 This can happen is the abort source thread finds the abortee (this) thread
381 in unmanaged code. If this thread never trips back to managed code or check
382 the local flag it will be left set and positively unbalance the global counter.
384 Leaving the counter unbalanced will cause a performance degradation since all threads
385 will now keep checking their local flags all the time.
387 if (InterlockedExchange (&thread->interruption_requested, 0))
388 InterlockedDecrement (&thread_interruption_requested);
390 /* if the thread is not in the hash it has been removed already */
391 if (!handle_remove (thread)) {
392 /* This needs to be called even if handle_remove () fails */
393 if (mono_thread_cleanup_fn)
394 mono_thread_cleanup_fn (thread);
397 mono_release_type_locks (thread);
399 mono_profiler_thread_end (thread->tid);
401 if (thread == mono_thread_internal_current ())
402 mono_thread_pop_appdomain_ref ();
404 thread->cached_culture_info = NULL;
406 mono_free_static_data (thread->static_data, TRUE);
407 thread->static_data = NULL;
408 ref_stack_destroy (thread->appdomain_refs);
409 thread->appdomain_refs = NULL;
411 if (mono_thread_cleanup_fn)
412 mono_thread_cleanup_fn (thread);
414 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
418 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
421 g_assert ((offset & 0x80000000) == 0);
422 offset &= 0x7fffffff;
423 idx = (offset >> 24) - 1;
424 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
428 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
430 static MonoClassField *current_thread_field = NULL;
434 if (!current_thread_field) {
435 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
436 g_assert (current_thread_field);
439 mono_class_vtable (domain, mono_defaults.thread_class);
440 mono_domain_lock (domain);
441 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
442 mono_domain_unlock (domain);
445 return get_thread_static_data (thread, offset);
449 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
451 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
453 g_assert (current->obj.vtable->domain == domain);
455 g_assert (!*current_thread_ptr);
456 *current_thread_ptr = current;
459 static MonoInternalThread*
460 create_internal_thread_object (void)
462 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
463 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
467 create_thread_object (MonoDomain *domain)
469 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
470 return (MonoThread*)mono_gc_alloc_mature (vt);
474 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
476 MonoThread *thread = create_thread_object (domain);
477 MONO_OBJECT_SETREF (thread, internal_thread, internal);
482 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
484 MonoDomain *domain = mono_get_root_domain ();
486 if (!candidate || candidate->obj.vtable->domain != domain)
487 candidate = new_thread_with_internal (domain, thread);
488 set_current_thread_for_domain (domain, thread, candidate);
489 g_assert (!thread->root_domain_thread);
490 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
493 static guint32 WINAPI start_wrapper_internal(void *data)
495 MonoThreadInfo *info;
496 struct StartInfo *start_info=(struct StartInfo *)data;
497 guint32 (*start_func)(void *);
501 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
504 MonoInternalThread *internal = start_info->obj->internal_thread;
505 MonoObject *start_delegate = start_info->delegate;
506 MonoDomain *domain = start_info->obj->obj.vtable->domain;
508 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
510 /* We can be sure start_info->obj->tid and
511 * start_info->obj->handle have been set, because the thread
512 * was created suspended, and these values were set before the
516 info = mono_thread_info_current ();
518 internal->thread_info = info;
523 SET_CURRENT_OBJECT (internal);
525 mono_monitor_init_tls ();
527 /* Every thread references the appdomain which created it */
528 mono_thread_push_appdomain_ref (domain);
530 if (!mono_domain_set (domain, FALSE)) {
531 /* No point in raising an appdomain_unloaded exception here */
532 /* FIXME: Cleanup here */
533 mono_thread_pop_appdomain_ref ();
537 start_func = start_info->func;
538 start_arg = start_info->start_arg;
540 /* We have to do this here because mono_thread_new_init()
541 requires that root_domain_thread is set up. */
542 thread_adjust_static_data (internal);
543 init_root_domain_thread (internal, start_info->obj);
545 /* This MUST be called before any managed code can be
546 * executed, as it calls the callback function that (for the
547 * jit) sets the lmf marker.
549 mono_thread_new_init (tid, &tid, start_func);
550 internal->stack_ptr = &tid;
552 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
554 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
556 /* On 2.0 profile (and higher), set explicitly since state might have been
558 if (internal->apartment_state == ThreadApartmentState_Unknown)
559 internal->apartment_state = ThreadApartmentState_MTA;
561 mono_thread_init_apartment_state ();
563 if(internal->start_notify!=NULL) {
564 /* Let the thread that called Start() know we're
567 ReleaseSemaphore (internal->start_notify, 1, NULL);
570 mono_threads_lock ();
571 mono_g_hash_table_remove (thread_start_args, start_info->obj);
572 mono_threads_unlock ();
574 mono_thread_set_execution_context (start_info->obj->ec_to_set);
575 start_info->obj->ec_to_set = NULL;
578 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
582 * Call this after calling start_notify, since the profiler callback might want
583 * to lock the thread, and the lock is held by thread_start () which waits for
586 mono_profiler_thread_start (tid);
588 /* start_func is set only for unmanaged start functions */
590 start_func (start_arg);
593 g_assert (start_delegate != NULL);
594 args [0] = start_arg;
595 /* we may want to handle the exception here. See comment below on unhandled exceptions */
596 mono_runtime_delegate_invoke (start_delegate, args, NULL);
599 /* If the thread calls ExitThread at all, this remaining code
600 * will not be executed, but the main thread will eventually
601 * call thread_cleanup() on this thread's behalf.
604 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
606 thread_cleanup (internal);
608 /* Do any cleanup needed for apartment state. This
609 * cannot be done in thread_cleanup since thread_cleanup could be
610 * called for a thread other than the current thread.
611 * mono_thread_cleanup_apartment_state cleans up apartment
612 * for the current thead */
613 mono_thread_cleanup_apartment_state ();
615 /* Remove the reference to the thread object in the TLS data,
616 * so the thread object can be finalized. This won't be
617 * reached if the thread threw an uncaught exception, so those
618 * thread handles will stay referenced :-( (This is due to
619 * missing support for scanning thread-specific data in the
620 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
623 SET_CURRENT_OBJECT (NULL);
624 mono_domain_unset ();
629 static guint32 WINAPI start_wrapper(void *data)
633 /* Avoid scanning the frames above this frame during a GC */
634 mono_gc_set_stack_end ((void*)&dummy);
636 return start_wrapper_internal (data);
639 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
641 if (mono_thread_start_cb) {
642 mono_thread_start_cb (tid, stack_start, func);
646 void mono_threads_set_default_stacksize (guint32 stacksize)
648 default_stacksize = stacksize;
651 guint32 mono_threads_get_default_stacksize (void)
653 return default_stacksize;
657 * mono_create_thread:
659 * This is a wrapper around CreateThread which handles differences in the type of
660 * the the 'tid' argument.
662 gpointer mono_create_thread (WapiSecurityAttributes *security,
663 guint32 stacksize, WapiThreadStart start,
664 gpointer param, guint32 create, gsize *tid)
671 res = mono_threads_CreateThread (security, stacksize, start, param, create, &real_tid);
675 res = CreateThread (security, stacksize, start, param, create, tid);
682 * The thread start argument may be an object reference, and there is
683 * no ref to keep it alive when the new thread is started but not yet
684 * registered with the collector. So we store it in a GC tracked hash
687 * LOCKING: Assumes the threads lock is held.
690 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
692 if (thread_start_args == NULL) {
693 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
694 thread_start_args = mono_g_hash_table_new (NULL, NULL);
696 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
699 MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
702 MonoInternalThread *internal;
703 HANDLE thread_handle;
704 struct StartInfo *start_info;
707 thread = create_thread_object (domain);
708 internal = create_internal_thread_object ();
709 MONO_OBJECT_SETREF (thread, internal_thread, internal);
711 start_info=g_new0 (struct StartInfo, 1);
712 start_info->func = func;
713 start_info->obj = thread;
714 start_info->start_arg = arg;
716 mono_threads_lock ();
718 mono_threads_unlock ();
722 if (threads_starting_up == NULL) {
723 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
724 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
727 register_thread_start_argument (thread, start_info);
728 mono_g_hash_table_insert (threads_starting_up, thread, thread);
729 mono_threads_unlock ();
732 stack_size = default_stacksize_for_thread (internal);
734 /* Create suspended, so we can do some housekeeping before the thread
737 thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
738 CREATE_SUSPENDED, &tid);
739 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
740 if (thread_handle == NULL) {
741 /* The thread couldn't be created, so throw an exception */
742 mono_threads_lock ();
743 mono_g_hash_table_remove (threads_starting_up, thread);
744 mono_threads_unlock ();
746 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
750 internal->handle=thread_handle;
752 internal->apartment_state=ThreadApartmentState_Unknown;
753 internal->thread_pinning_ref = internal;
754 internal->managed_id = get_next_managed_thread_id ();
755 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
757 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
758 InitializeCriticalSection (internal->synch_cs);
760 internal->threadpool_thread = threadpool_thread;
761 if (threadpool_thread)
762 mono_thread_set_state (internal, ThreadState_Background);
764 if (handle_store (thread))
765 ResumeThread (thread_handle);
767 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
768 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
774 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
776 mono_thread_create_internal (domain, func, arg, FALSE, 0);
780 * mono_thread_get_stack_bounds:
782 * Return the address and size of the current threads stack. Return NULL as the
783 * stack address if the stack address cannot be determined.
786 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
788 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
789 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
790 *stsize = pthread_get_stacksize_np (pthread_self ());
792 /* staddr points to the start of the stack, not the end */
794 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
796 /* FIXME: simplify the mess below */
797 #elif !defined(HOST_WIN32)
799 guint8 *current = (guint8*)&attr;
801 pthread_attr_init (&attr);
802 # ifdef HAVE_PTHREAD_GETATTR_NP
803 pthread_getattr_np (pthread_self(), &attr);
805 # ifdef HAVE_PTHREAD_ATTR_GET_NP
806 pthread_attr_get_np (pthread_self(), &attr);
809 pthread_attr_getstacksize (&attr, &stsize);
810 # elif defined(__OpenBSD__)
814 rslt = pthread_stackseg_np(pthread_self(), &ss);
815 g_assert (rslt == 0);
817 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
818 *stsize = ss.ss_size;
827 # if !defined(__OpenBSD__)
828 pthread_attr_getstack (&attr, (void**)staddr, stsize);
831 g_assert ((current > *staddr) && (current < *staddr + *stsize));
834 pthread_attr_destroy (&attr);
837 *stsize = (size_t)-1;
840 /* When running under emacs, sometimes staddr is not aligned to a page size */
841 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
845 mono_thread_attach (MonoDomain *domain)
847 MonoInternalThread *thread;
848 MonoThread *current_thread;
849 HANDLE thread_handle;
852 if ((thread = mono_thread_internal_current ())) {
853 if (domain != mono_domain_get ())
854 mono_domain_set (domain, TRUE);
855 /* Already attached */
856 return mono_thread_current ();
859 if (!mono_gc_register_thread (&domain)) {
860 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 ());
863 thread = create_internal_thread_object ();
865 thread_handle = GetCurrentThread ();
866 g_assert (thread_handle);
868 tid=GetCurrentThreadId ();
871 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
872 * refer to the thread from other threads for things like aborting.
874 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
875 THREAD_ALL_ACCESS, TRUE, 0);
877 thread->handle=thread_handle;
879 #ifdef PLATFORM_ANDROID
880 thread->android_tid = (gpointer) gettid ();
882 thread->apartment_state=ThreadApartmentState_Unknown;
883 thread->thread_pinning_ref = thread;
884 thread->managed_id = get_next_managed_thread_id ();
885 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
887 thread->stack_ptr = &tid;
889 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
890 InitializeCriticalSection (thread->synch_cs);
892 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
894 current_thread = new_thread_with_internal (domain, thread);
896 if (!handle_store (current_thread)) {
897 /* Mono is shutting down, so just wait for the end */
902 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
904 SET_CURRENT_OBJECT (thread);
905 mono_domain_set (domain, TRUE);
907 mono_monitor_init_tls ();
909 thread_adjust_static_data (thread);
911 init_root_domain_thread (thread, current_thread);
912 if (domain != mono_get_root_domain ())
913 set_current_thread_for_domain (domain, thread, current_thread);
916 if (mono_thread_attach_cb) {
920 mono_thread_get_stack_bounds (&staddr, &stsize);
923 mono_thread_attach_cb (tid, &tid);
925 mono_thread_attach_cb (tid, staddr + stsize);
928 // FIXME: Need a separate callback
929 mono_profiler_thread_start (tid);
931 return current_thread;
935 mono_thread_detach (MonoThread *thread)
937 g_return_if_fail (thread != NULL);
939 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
941 mono_profiler_thread_end (thread->internal_thread->tid);
943 thread_cleanup (thread->internal_thread);
945 SET_CURRENT_OBJECT (NULL);
946 mono_domain_unset ();
948 /* Don't need to CloseHandle this thread, even though we took a
949 * reference in mono_thread_attach (), because the GC will do it
950 * when the Thread object is finalised.
957 MonoInternalThread *thread = mono_thread_internal_current ();
959 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
961 thread_cleanup (thread);
962 SET_CURRENT_OBJECT (NULL);
963 mono_domain_unset ();
965 /* we could add a callback here for embedders to use. */
966 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
967 exit (mono_environment_exitcode_get ());
972 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
974 MonoInternalThread *internal = create_internal_thread_object ();
976 internal->state = ThreadState_Unstarted;
977 internal->apartment_state = ThreadApartmentState_Unknown;
978 internal->managed_id = get_next_managed_thread_id ();
980 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
983 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
986 guint32 (*start_func)(void *);
987 struct StartInfo *start_info;
990 MonoInternalThread *internal;
992 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
994 if (!this->internal_thread)
995 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
996 internal = this->internal_thread;
998 ensure_synch_cs_set (internal);
1000 EnterCriticalSection (internal->synch_cs);
1002 if ((internal->state & ThreadState_Unstarted) == 0) {
1003 LeaveCriticalSection (internal->synch_cs);
1004 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1008 if ((internal->state & ThreadState_Aborted) != 0) {
1009 LeaveCriticalSection (internal->synch_cs);
1014 /* This is freed in start_wrapper */
1015 start_info = g_new0 (struct StartInfo, 1);
1016 start_info->func = start_func;
1017 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1018 start_info->delegate = start;
1019 start_info->obj = this;
1020 g_assert (this->obj.vtable->domain == mono_domain_get ());
1022 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1023 if (internal->start_notify==NULL) {
1024 LeaveCriticalSection (internal->synch_cs);
1025 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1026 g_free (start_info);
1030 mono_threads_lock ();
1031 register_thread_start_argument (this, start_info);
1032 if (threads_starting_up == NULL) {
1033 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1034 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1036 mono_g_hash_table_insert (threads_starting_up, this, this);
1037 mono_threads_unlock ();
1039 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1040 CREATE_SUSPENDED, &tid);
1042 LeaveCriticalSection (internal->synch_cs);
1043 mono_threads_lock ();
1044 mono_g_hash_table_remove (threads_starting_up, this);
1045 mono_threads_unlock ();
1046 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1050 internal->handle=thread;
1052 internal->thread_pinning_ref = internal;
1053 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1056 /* Don't call handle_store() here, delay it to Start.
1057 * We can't join a thread (trying to will just block
1058 * forever) until it actually starts running, so don't
1059 * store the handle till then.
1062 mono_thread_start (this);
1064 internal->state &= ~ThreadState_Unstarted;
1066 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1068 LeaveCriticalSection (internal->synch_cs);
1073 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1075 MONO_ARCH_SAVE_REGS;
1077 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1080 CloseHandle (thread);
1082 if (this->synch_cs) {
1083 CRITICAL_SECTION *synch_cs = this->synch_cs;
1084 this->synch_cs = NULL;
1085 DeleteCriticalSection (synch_cs);
1090 void *name = this->name;
1096 static void mono_thread_start (MonoThread *thread)
1098 MonoInternalThread *internal = thread->internal_thread;
1100 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1102 /* Only store the handle when the thread is about to be
1103 * launched, to avoid the main thread deadlocking while trying
1104 * to clean up a thread that will never be signalled.
1106 if (!handle_store (thread))
1109 ResumeThread (internal->handle);
1111 if(internal->start_notify!=NULL) {
1112 /* Wait for the thread to set up its TLS data etc, so
1113 * theres no potential race condition if someone tries
1114 * to look up the data believing the thread has
1118 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1120 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1121 CloseHandle (internal->start_notify);
1122 internal->start_notify = NULL;
1125 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1128 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1131 MonoInternalThread *thread = mono_thread_internal_current ();
1133 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1135 mono_thread_current_check_pending_interrupt ();
1138 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1140 res = SleepEx(ms,TRUE);
1142 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1144 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1145 MonoException* exc = mono_thread_execute_interruption (thread);
1147 mono_raise_exception (exc);
1159 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1164 ves_icall_System_Threading_Thread_GetDomainID (void)
1166 MONO_ARCH_SAVE_REGS;
1168 return mono_domain_get()->domain_id;
1172 ves_icall_System_Threading_Thread_Yield (void)
1175 return SwitchToThread ();
1177 return sched_yield () == 0;
1182 * mono_thread_get_name:
1184 * Return the name of the thread. NAME_LEN is set to the length of the name.
1185 * Return NULL if the thread has no name. The returned memory is owned by the
1189 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1193 ensure_synch_cs_set (this_obj);
1195 EnterCriticalSection (this_obj->synch_cs);
1197 if (!this_obj->name) {
1201 *name_len = this_obj->name_len;
1202 res = g_new (gunichar2, this_obj->name_len);
1203 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1206 LeaveCriticalSection (this_obj->synch_cs);
1212 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1216 ensure_synch_cs_set (this_obj);
1218 EnterCriticalSection (this_obj->synch_cs);
1220 if (!this_obj->name)
1223 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1225 LeaveCriticalSection (this_obj->synch_cs);
1231 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1233 ensure_synch_cs_set (this_obj);
1235 EnterCriticalSection (this_obj->synch_cs);
1237 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1238 LeaveCriticalSection (this_obj->synch_cs);
1240 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1244 this_obj->name = g_new (gunichar2, mono_string_length (name));
1245 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1246 this_obj->name_len = mono_string_length (name);
1249 this_obj->name = NULL;
1252 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1254 LeaveCriticalSection (this_obj->synch_cs);
1255 if (this_obj->name) {
1256 char *tname = mono_string_to_utf8 (name);
1257 mono_profiler_thread_name (this_obj->tid, tname);
1263 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1265 mono_thread_set_name_internal (this_obj, name, TRUE);
1268 /* If the array is already in the requested domain, we just return it,
1269 otherwise we return a copy in that domain. */
1271 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1278 if (mono_object_domain (arr) == domain)
1281 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1282 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1287 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1289 return byte_array_to_domain (arr, mono_get_root_domain ());
1293 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1295 return byte_array_to_domain (arr, mono_domain_get ());
1299 mono_thread_current (void)
1301 MonoDomain *domain = mono_domain_get ();
1302 MonoInternalThread *internal = mono_thread_internal_current ();
1303 MonoThread **current_thread_ptr;
1305 g_assert (internal);
1306 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1308 if (!*current_thread_ptr) {
1309 g_assert (domain != mono_get_root_domain ());
1310 *current_thread_ptr = new_thread_with_internal (domain, internal);
1312 return *current_thread_ptr;
1316 mono_thread_internal_current (void)
1318 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1319 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1323 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1324 int ms, HANDLE thread)
1326 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1329 mono_thread_current_check_pending_interrupt ();
1331 ensure_synch_cs_set (this);
1333 EnterCriticalSection (this->synch_cs);
1335 if ((this->state & ThreadState_Unstarted) != 0) {
1336 LeaveCriticalSection (this->synch_cs);
1338 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1342 LeaveCriticalSection (this->synch_cs);
1347 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1349 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1351 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1353 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1355 if(ret==WAIT_OBJECT_0) {
1356 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1361 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1366 /* FIXME: exitContext isnt documented */
1367 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1373 MonoObject *waitHandle;
1374 MonoInternalThread *thread = mono_thread_internal_current ();
1376 /* Do this WaitSleepJoin check before creating objects */
1377 mono_thread_current_check_pending_interrupt ();
1379 numhandles = mono_array_length(mono_handles);
1380 handles = g_new0(HANDLE, numhandles);
1382 for(i = 0; i < numhandles; i++) {
1383 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1384 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1391 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1393 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1395 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1399 if(ret==WAIT_FAILED) {
1400 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1402 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1403 /* Do we want to try again if we get
1404 * WAIT_IO_COMPLETION? The documentation for
1405 * WaitHandle doesn't give any clues. (We'd have to
1406 * fiddle with the timeout if we retry.)
1408 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1415 /* FIXME: exitContext isnt documented */
1416 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1418 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1422 MonoObject *waitHandle;
1423 MonoInternalThread *thread = mono_thread_internal_current ();
1426 /* Do this WaitSleepJoin check before creating objects */
1427 mono_thread_current_check_pending_interrupt ();
1429 numhandles = mono_array_length(mono_handles);
1430 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1433 for(i = 0; i < numhandles; i++) {
1434 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1435 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1442 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1444 start = (ms == -1) ? 0 : mono_msec_ticks ();
1446 ret = WaitForMultipleObjectsEx (numhandles, handles, FALSE, ms, TRUE);
1447 if (ret != WAIT_IO_COMPLETION)
1452 diff = mono_msec_ticks () - start;
1457 } while (ms == -1 || ms > 0);
1459 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1461 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1464 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1466 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1467 return ret - WAIT_OBJECT_0;
1469 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1470 return ret - WAIT_ABANDONED_0;
1477 /* FIXME: exitContext isnt documented */
1478 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1481 MonoInternalThread *thread = mono_thread_internal_current ();
1483 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1489 mono_thread_current_check_pending_interrupt ();
1491 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1493 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1495 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1497 if(ret==WAIT_FAILED) {
1498 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1500 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1501 /* Do we want to try again if we get
1502 * WAIT_IO_COMPLETION? The documentation for
1503 * WaitHandle doesn't give any clues. (We'd have to
1504 * fiddle with the timeout if we retry.)
1506 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1514 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1517 MonoInternalThread *thread = mono_thread_internal_current ();
1519 MONO_ARCH_SAVE_REGS;
1524 mono_thread_current_check_pending_interrupt ();
1526 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1528 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1530 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1532 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1535 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1539 MONO_ARCH_SAVE_REGS;
1544 mutex = CreateMutex (NULL, owned, NULL);
1546 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1548 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1556 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1557 MONO_ARCH_SAVE_REGS;
1559 return(ReleaseMutex (handle));
1562 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1568 MONO_ARCH_SAVE_REGS;
1570 *error = ERROR_SUCCESS;
1572 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1574 *error = GetLastError ();
1581 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1585 MONO_ARCH_SAVE_REGS;
1590 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1592 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1593 mono_string_chars (name));
1595 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1603 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1607 MONO_ARCH_SAVE_REGS;
1609 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1614 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1618 MONO_ARCH_SAVE_REGS;
1620 *error = ERROR_SUCCESS;
1622 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1624 *error = GetLastError ();
1630 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1634 MONO_ARCH_SAVE_REGS;
1639 event = CreateEvent (NULL, manual, initial, NULL);
1641 event = CreateEvent (NULL, manual, initial,
1642 mono_string_chars (name));
1644 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1652 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1653 MONO_ARCH_SAVE_REGS;
1655 return (SetEvent(handle));
1658 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1659 MONO_ARCH_SAVE_REGS;
1661 return (ResetEvent(handle));
1665 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1666 MONO_ARCH_SAVE_REGS;
1668 CloseHandle (handle);
1671 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1677 MONO_ARCH_SAVE_REGS;
1679 *error = ERROR_SUCCESS;
1681 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1683 *error = GetLastError ();
1689 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1691 MONO_ARCH_SAVE_REGS;
1693 return InterlockedIncrement (location);
1696 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1700 MONO_ARCH_SAVE_REGS;
1702 mono_interlocked_lock ();
1706 mono_interlocked_unlock ();
1712 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1714 MONO_ARCH_SAVE_REGS;
1716 return InterlockedDecrement(location);
1719 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1723 MONO_ARCH_SAVE_REGS;
1725 mono_interlocked_lock ();
1729 mono_interlocked_unlock ();
1734 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1736 MONO_ARCH_SAVE_REGS;
1738 return InterlockedExchange(location, value);
1741 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1744 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1745 mono_gc_wbarrier_generic_nostore (location);
1749 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1751 return InterlockedExchangePointer(location, value);
1754 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1756 IntFloatUnion val, ret;
1758 MONO_ARCH_SAVE_REGS;
1761 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1767 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1769 #if SIZEOF_VOID_P == 8
1770 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1775 * According to MSDN, this function is only atomic with regards to the
1776 * other Interlocked functions on 32 bit platforms.
1778 mono_interlocked_lock ();
1781 mono_interlocked_unlock ();
1788 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1790 #if SIZEOF_VOID_P == 8
1791 LongDoubleUnion val, ret;
1794 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1801 * According to MSDN, this function is only atomic with regards to the
1802 * other Interlocked functions on 32 bit platforms.
1804 mono_interlocked_lock ();
1807 mono_interlocked_unlock ();
1813 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1815 MONO_ARCH_SAVE_REGS;
1817 return InterlockedCompareExchange(location, value, comparand);
1820 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1823 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1824 mono_gc_wbarrier_generic_nostore (location);
1828 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1830 return InterlockedCompareExchangePointer(location, value, comparand);
1833 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1835 IntFloatUnion val, ret, cmp;
1837 MONO_ARCH_SAVE_REGS;
1840 cmp.fval = comparand;
1841 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1847 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1849 #if SIZEOF_VOID_P == 8
1850 LongDoubleUnion val, comp, ret;
1853 comp.fval = comparand;
1854 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1860 mono_interlocked_lock ();
1862 if (old == comparand)
1864 mono_interlocked_unlock ();
1871 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1873 #if SIZEOF_VOID_P == 8
1874 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1878 mono_interlocked_lock ();
1880 if (old == comparand)
1882 mono_interlocked_unlock ();
1889 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1892 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1893 mono_gc_wbarrier_generic_nostore (location);
1898 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1901 res = InterlockedExchangePointer ((gpointer *)location, value);
1902 mono_gc_wbarrier_generic_nostore (location);
1907 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1909 #if SIZEOF_VOID_P == 8
1910 /* Should be implemented as a JIT intrinsic */
1911 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1916 mono_interlocked_lock ();
1918 *location = orig + value;
1919 mono_interlocked_unlock ();
1921 return orig + value;
1926 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1928 #if SIZEOF_VOID_P == 8
1929 /* Should be implemented as a JIT intrinsic */
1930 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1935 mono_interlocked_lock ();
1937 *location = orig + value;
1938 mono_interlocked_unlock ();
1940 return orig + value;
1945 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1947 #if SIZEOF_VOID_P == 8
1948 /* 64 bit reads are already atomic */
1953 mono_interlocked_lock ();
1955 mono_interlocked_unlock ();
1962 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1964 mono_threads_lock ();
1965 mono_threads_unlock ();
1969 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1971 mono_thread_clr_state (this, state);
1973 if (state & ThreadState_Background) {
1974 /* If the thread changes the background mode, the main thread has to
1975 * be notified, since it has to rebuild the list of threads to
1978 SetEvent (background_change_event);
1983 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1985 mono_thread_set_state (this, state);
1987 if (state & ThreadState_Background) {
1988 /* If the thread changes the background mode, the main thread has to
1989 * be notified, since it has to rebuild the list of threads to
1992 SetEvent (background_change_event);
1997 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2001 ensure_synch_cs_set (this);
2003 EnterCriticalSection (this->synch_cs);
2005 state = this->state;
2007 LeaveCriticalSection (this->synch_cs);
2012 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2014 MonoInternalThread *current;
2017 ensure_synch_cs_set (this);
2019 current = mono_thread_internal_current ();
2021 EnterCriticalSection (this->synch_cs);
2023 this->thread_interrupt_requested = TRUE;
2024 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2026 LeaveCriticalSection (this->synch_cs);
2029 abort_thread_internal (this, TRUE, FALSE);
2033 void mono_thread_current_check_pending_interrupt ()
2035 MonoInternalThread *thread = mono_thread_internal_current ();
2036 gboolean throw = FALSE;
2038 mono_debugger_check_interruption ();
2040 ensure_synch_cs_set (thread);
2042 EnterCriticalSection (thread->synch_cs);
2044 if (thread->thread_interrupt_requested) {
2046 thread->thread_interrupt_requested = FALSE;
2049 LeaveCriticalSection (thread->synch_cs);
2052 mono_raise_exception (mono_get_exception_thread_interrupted ());
2057 mono_thread_get_abort_signal (void)
2069 static int abort_signum = -1;
2071 if (abort_signum != -1)
2072 return abort_signum;
2073 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2074 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2075 struct sigaction sinfo;
2076 sigaction (i, NULL, &sinfo);
2077 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2082 /* fallback to the old way */
2085 #endif /* HOST_WIN32 */
2089 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2091 MonoException* exc = mono_thread_request_interruption (FALSE);
2092 if (exc) mono_raise_exception (exc);
2094 #endif /* HOST_WIN32 */
2097 * signal_thread_state_change
2099 * Tells the thread that his state has changed and it has to enter the new
2100 * state as soon as possible.
2102 static void signal_thread_state_change (MonoInternalThread *thread)
2104 if (thread == mono_thread_internal_current ()) {
2105 /* Do it synchronously */
2106 MonoException *exc = mono_thread_request_interruption (FALSE);
2108 mono_raise_exception (exc);
2112 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2114 /* fixme: store the state somewhere */
2115 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2118 * This will cause waits to be broken.
2119 * It will also prevent the thread from entering a wait, so if the thread returns
2120 * from the wait before it receives the abort signal, it will just spin in the wait
2121 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2124 wapi_interrupt_thread (thread->handle);
2125 #endif /* HOST_WIN32 */
2129 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2131 ensure_synch_cs_set (thread);
2133 EnterCriticalSection (thread->synch_cs);
2135 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2136 (thread->state & ThreadState_StopRequested) != 0 ||
2137 (thread->state & ThreadState_Stopped) != 0)
2139 LeaveCriticalSection (thread->synch_cs);
2143 if ((thread->state & ThreadState_Unstarted) != 0) {
2144 thread->state |= ThreadState_Aborted;
2145 LeaveCriticalSection (thread->synch_cs);
2149 thread->state |= ThreadState_AbortRequested;
2150 if (thread->abort_state_handle)
2151 mono_gchandle_free (thread->abort_state_handle);
2153 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2154 g_assert (thread->abort_state_handle);
2156 thread->abort_state_handle = 0;
2158 thread->abort_exc = NULL;
2161 * abort_exc is set in mono_thread_execute_interruption(),
2162 * triggered by the call to signal_thread_state_change(),
2163 * below. There's a point between where we have
2164 * abort_state_handle set, but abort_exc NULL, but that's not
2168 LeaveCriticalSection (thread->synch_cs);
2170 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2172 /* During shutdown, we can't wait for other threads */
2174 /* Make sure the thread is awake */
2175 mono_thread_resume (thread);
2177 abort_thread_internal (thread, TRUE, TRUE);
2181 ves_icall_System_Threading_Thread_ResetAbort (void)
2183 MonoInternalThread *thread = mono_thread_internal_current ();
2184 gboolean was_aborting;
2186 ensure_synch_cs_set (thread);
2188 EnterCriticalSection (thread->synch_cs);
2189 was_aborting = thread->state & ThreadState_AbortRequested;
2190 thread->state &= ~ThreadState_AbortRequested;
2191 LeaveCriticalSection (thread->synch_cs);
2193 if (!was_aborting) {
2194 const char *msg = "Unable to reset abort because no abort was requested";
2195 mono_raise_exception (mono_get_exception_thread_state (msg));
2197 thread->abort_exc = NULL;
2198 if (thread->abort_state_handle) {
2199 mono_gchandle_free (thread->abort_state_handle);
2200 /* This is actually not necessary - the handle
2201 only counts if the exception is set */
2202 thread->abort_state_handle = 0;
2207 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2209 ensure_synch_cs_set (thread);
2211 EnterCriticalSection (thread->synch_cs);
2213 thread->state &= ~ThreadState_AbortRequested;
2215 if (thread->abort_exc) {
2216 thread->abort_exc = NULL;
2217 if (thread->abort_state_handle) {
2218 mono_gchandle_free (thread->abort_state_handle);
2219 /* This is actually not necessary - the handle
2220 only counts if the exception is set */
2221 thread->abort_state_handle = 0;
2225 LeaveCriticalSection (thread->synch_cs);
2229 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2231 MonoInternalThread *thread = this->internal_thread;
2232 MonoObject *state, *deserialized = NULL, *exc;
2235 if (!thread->abort_state_handle)
2238 state = mono_gchandle_get_target (thread->abort_state_handle);
2241 domain = mono_domain_get ();
2242 if (mono_object_domain (state) == domain)
2245 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2247 if (!deserialized) {
2248 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2250 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2251 mono_raise_exception (invalid_op_exc);
2254 return deserialized;
2258 mono_thread_suspend (MonoInternalThread *thread)
2260 ensure_synch_cs_set (thread);
2262 EnterCriticalSection (thread->synch_cs);
2264 if ((thread->state & ThreadState_Unstarted) != 0 ||
2265 (thread->state & ThreadState_Aborted) != 0 ||
2266 (thread->state & ThreadState_Stopped) != 0)
2268 LeaveCriticalSection (thread->synch_cs);
2272 if ((thread->state & ThreadState_Suspended) != 0 ||
2273 (thread->state & ThreadState_SuspendRequested) != 0 ||
2274 (thread->state & ThreadState_StopRequested) != 0)
2276 LeaveCriticalSection (thread->synch_cs);
2280 thread->state |= ThreadState_SuspendRequested;
2282 LeaveCriticalSection (thread->synch_cs);
2284 suspend_thread_internal (thread, FALSE);
2289 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2291 if (!mono_thread_suspend (thread))
2292 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2296 mono_thread_resume (MonoInternalThread *thread)
2298 ensure_synch_cs_set (thread);
2300 EnterCriticalSection (thread->synch_cs);
2302 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2303 thread->state &= ~ThreadState_SuspendRequested;
2304 LeaveCriticalSection (thread->synch_cs);
2308 if ((thread->state & ThreadState_Suspended) == 0 ||
2309 (thread->state & ThreadState_Unstarted) != 0 ||
2310 (thread->state & ThreadState_Aborted) != 0 ||
2311 (thread->state & ThreadState_Stopped) != 0)
2313 LeaveCriticalSection (thread->synch_cs);
2317 return resume_thread_internal (thread);
2321 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2323 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2324 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2328 mono_threads_is_critical_method (MonoMethod *method)
2330 switch (method->wrapper_type) {
2331 case MONO_WRAPPER_RUNTIME_INVOKE:
2332 case MONO_WRAPPER_XDOMAIN_INVOKE:
2333 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2340 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2345 if (mono_threads_is_critical_method (m)) {
2346 *((gboolean*)data) = TRUE;
2353 is_running_protected_wrapper (void)
2355 gboolean found = FALSE;
2356 mono_stack_walk (find_wrapper, &found);
2360 void mono_thread_internal_stop (MonoInternalThread *thread)
2362 ensure_synch_cs_set (thread);
2364 EnterCriticalSection (thread->synch_cs);
2366 if ((thread->state & ThreadState_StopRequested) != 0 ||
2367 (thread->state & ThreadState_Stopped) != 0)
2369 LeaveCriticalSection (thread->synch_cs);
2373 /* Make sure the thread is awake */
2374 mono_thread_resume (thread);
2376 thread->state |= ThreadState_StopRequested;
2377 thread->state &= ~ThreadState_AbortRequested;
2379 LeaveCriticalSection (thread->synch_cs);
2381 abort_thread_internal (thread, TRUE, TRUE);
2384 void mono_thread_stop (MonoThread *thread)
2386 mono_thread_internal_stop (thread->internal_thread);
2390 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2392 return *((volatile gint8 *) (ptr));
2396 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2398 return *((volatile gint16 *) (ptr));
2402 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2404 return *((volatile gint32 *) (ptr));
2408 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2410 return *((volatile gint64 *) (ptr));
2414 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2416 return (void *) *((volatile void **) ptr);
2420 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2422 return *((volatile double *) (ptr));
2426 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2428 return *((volatile float *) (ptr));
2432 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2434 *((volatile gint8 *) ptr) = value;
2438 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2440 *((volatile gint16 *) ptr) = value;
2444 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2446 *((volatile gint32 *) ptr) = value;
2450 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2452 *((volatile gint64 *) ptr) = value;
2456 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2458 *((volatile void **) ptr) = value;
2462 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2464 mono_gc_wbarrier_generic_store (ptr, value);
2468 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2470 *((volatile double *) ptr) = value;
2474 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2476 *((volatile float *) ptr) = value;
2479 void mono_thread_init (MonoThreadStartCB start_cb,
2480 MonoThreadAttachCB attach_cb)
2482 InitializeCriticalSection(&threads_mutex);
2483 InitializeCriticalSection(&interlocked_mutex);
2484 InitializeCriticalSection(&contexts_mutex);
2486 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2487 g_assert(background_change_event != NULL);
2489 mono_init_static_data_info (&thread_static_info);
2490 mono_init_static_data_info (&context_static_info);
2492 MONO_FAST_TLS_INIT (tls_current_object);
2493 mono_native_tls_alloc (¤t_object_key, NULL);
2494 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2496 mono_thread_start_cb = start_cb;
2497 mono_thread_attach_cb = attach_cb;
2499 /* Get a pseudo handle to the current process. This is just a
2500 * kludge so that wapi can build a process handle if needed.
2501 * As a pseudo handle is returned, we don't need to clean
2504 GetCurrentProcess ();
2507 void mono_thread_cleanup (void)
2509 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2510 /* The main thread must abandon any held mutexes (particularly
2511 * important for named mutexes as they are shared across
2512 * processes, see bug 74680.) This will happen when the
2513 * thread exits, but if it's not running in a subthread it
2514 * won't exit in time.
2516 /* Using non-w32 API is a nasty kludge, but I couldn't find
2517 * anything in the documentation that would let me do this
2518 * here yet still be safe to call on windows.
2520 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2524 /* This stuff needs more testing, it seems one of these
2525 * critical sections can be locked when mono_thread_cleanup is
2528 DeleteCriticalSection (&threads_mutex);
2529 DeleteCriticalSection (&interlocked_mutex);
2530 DeleteCriticalSection (&contexts_mutex);
2531 DeleteCriticalSection (&delayed_free_table_mutex);
2532 DeleteCriticalSection (&small_id_mutex);
2533 CloseHandle (background_change_event);
2536 mono_native_tls_free (current_object_key);
2540 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2542 mono_thread_cleanup_fn = func;
2546 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2548 thread->internal_thread->manage_callback = func;
2551 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2553 mono_thread_notify_pending_exc_fn = func;
2557 static void print_tids (gpointer key, gpointer value, gpointer user)
2559 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2560 * sizeof(uint) and a cast to uint would overflow
2562 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2563 * print this as a pointer.
2565 g_message ("Waiting for: %p", key);
2570 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2571 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2575 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2579 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2581 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2583 if(ret==WAIT_FAILED) {
2584 /* See the comment in build_wait_tids() */
2585 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2589 for(i=0; i<wait->num; i++)
2590 CloseHandle (wait->handles[i]);
2592 if (ret == WAIT_TIMEOUT)
2595 for(i=0; i<wait->num; i++) {
2596 gsize tid = wait->threads[i]->tid;
2598 mono_threads_lock ();
2599 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2600 /* This thread must have been killed, because
2601 * it hasn't cleaned itself up. (It's just
2602 * possible that the thread exited before the
2603 * parent thread had a chance to store the
2604 * handle, and now there is another pointer to
2605 * the already-exited thread stored. In this
2606 * case, we'll just get two
2607 * mono_profiler_thread_end() calls for the
2611 mono_threads_unlock ();
2612 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2613 thread_cleanup (wait->threads[i]);
2615 mono_threads_unlock ();
2620 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2622 guint32 i, ret, count;
2624 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2626 /* Add the thread state change event, so it wakes up if a thread changes
2627 * to background mode.
2630 if (count < MAXIMUM_WAIT_OBJECTS) {
2631 wait->handles [count] = background_change_event;
2635 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2637 if(ret==WAIT_FAILED) {
2638 /* See the comment in build_wait_tids() */
2639 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2643 for(i=0; i<wait->num; i++)
2644 CloseHandle (wait->handles[i]);
2646 if (ret == WAIT_TIMEOUT)
2649 if (ret < wait->num) {
2650 gsize tid = wait->threads[ret]->tid;
2651 mono_threads_lock ();
2652 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2653 /* See comment in wait_for_tids about thread cleanup */
2654 mono_threads_unlock ();
2655 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2656 thread_cleanup (wait->threads [ret]);
2658 mono_threads_unlock ();
2662 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2664 struct wait_data *wait=(struct wait_data *)user;
2666 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2668 MonoInternalThread *thread=(MonoInternalThread *)value;
2670 /* Ignore background threads, we abort them later */
2671 /* Do not lock here since it is not needed and the caller holds threads_lock */
2672 if (thread->state & ThreadState_Background) {
2673 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2674 return; /* just leave, ignore */
2677 if (mono_gc_is_finalizer_internal_thread (thread)) {
2678 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2682 if (thread == mono_thread_internal_current ()) {
2683 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2687 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2688 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2692 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2693 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2697 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2698 if (handle == NULL) {
2699 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2703 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2704 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2705 wait->handles[wait->num]=handle;
2706 wait->threads[wait->num]=thread;
2709 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2711 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2716 /* Just ignore the rest, we can't do anything with
2723 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2725 struct wait_data *wait=(struct wait_data *)user;
2726 gsize self = GetCurrentThreadId ();
2727 MonoInternalThread *thread = value;
2730 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2733 /* The finalizer thread is not a background thread */
2734 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2735 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2737 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2741 /* printf ("A: %d\n", wait->num); */
2742 wait->handles[wait->num]=thread->handle;
2743 wait->threads[wait->num]=thread;
2746 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2747 mono_thread_internal_stop (thread);
2751 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2755 * mono_threads_set_shutting_down:
2757 * Is called by a thread that wants to shut down Mono. If the runtime is already
2758 * shutting down, the calling thread is suspended/stopped, and this function never
2762 mono_threads_set_shutting_down (void)
2764 MonoInternalThread *current_thread = mono_thread_internal_current ();
2766 mono_threads_lock ();
2768 if (shutting_down) {
2769 mono_threads_unlock ();
2771 /* Make sure we're properly suspended/stopped */
2773 EnterCriticalSection (current_thread->synch_cs);
2775 if ((current_thread->state & ThreadState_SuspendRequested) ||
2776 (current_thread->state & ThreadState_AbortRequested) ||
2777 (current_thread->state & ThreadState_StopRequested)) {
2778 LeaveCriticalSection (current_thread->synch_cs);
2779 mono_thread_execute_interruption (current_thread);
2781 current_thread->state |= ThreadState_Stopped;
2782 LeaveCriticalSection (current_thread->synch_cs);
2785 /*since we're killing the thread, unset the current domain.*/
2786 mono_domain_unset ();
2788 /* Wake up other threads potentially waiting for us */
2791 shutting_down = TRUE;
2793 /* Not really a background state change, but this will
2794 * interrupt the main thread if it is waiting for all
2795 * the other threads.
2797 SetEvent (background_change_event);
2799 mono_threads_unlock ();
2804 * mono_threads_is_shutting_down:
2806 * Returns whether a thread has commenced shutdown of Mono. Note that
2807 * if the function returns FALSE the caller must not assume that
2808 * shutdown is not in progress, because the situation might have
2809 * changed since the function returned. For that reason this function
2810 * is of very limited utility.
2813 mono_threads_is_shutting_down (void)
2815 return shutting_down;
2818 void mono_thread_manage (void)
2820 struct wait_data wait_data;
2821 struct wait_data *wait = &wait_data;
2823 memset (wait, 0, sizeof (struct wait_data));
2824 /* join each thread that's still running */
2825 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2827 mono_threads_lock ();
2829 THREAD_DEBUG (g_message("%s: No threads", __func__));
2830 mono_threads_unlock ();
2833 mono_threads_unlock ();
2836 mono_threads_lock ();
2837 if (shutting_down) {
2838 /* somebody else is shutting down */
2839 mono_threads_unlock ();
2842 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2843 mono_g_hash_table_foreach (threads, print_tids, NULL));
2845 ResetEvent (background_change_event);
2847 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2848 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2849 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2850 mono_threads_unlock ();
2852 /* Something to wait for */
2853 wait_for_tids_or_state_change (wait, INFINITE);
2855 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2856 } while(wait->num>0);
2858 #ifndef MONO_CROSS_COMPILE
2859 mono_runtime_shutdown ();
2862 mono_threads_set_shutting_down ();
2864 /* No new threads will be created after this point */
2866 mono_runtime_set_shutting_down ();
2868 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2869 mono_thread_pool_cleanup ();
2872 * Remove everything but the finalizer thread and self.
2873 * Also abort all the background threads
2876 mono_threads_lock ();
2879 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2880 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2881 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2883 mono_threads_unlock ();
2885 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2887 /* Something to wait for */
2888 wait_for_tids (wait, INFINITE);
2890 } while (wait->num > 0);
2893 * give the subthreads a chance to really quit (this is mainly needed
2894 * to get correct user and system times from getrusage/wait/time(1)).
2895 * This could be removed if we avoid pthread_detach() and use pthread_join().
2902 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2904 MonoInternalThread *thread=(MonoInternalThread *)value;
2906 if(thread->tid != (gsize)user) {
2907 /*TerminateThread (thread->handle, -1);*/
2911 void mono_thread_abort_all_other_threads (void)
2913 gsize self = GetCurrentThreadId ();
2915 mono_threads_lock ();
2916 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2917 mono_g_hash_table_size (threads));
2918 mono_g_hash_table_foreach (threads, print_tids, NULL));
2920 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2922 mono_threads_unlock ();
2926 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2928 MonoInternalThread *thread = (MonoInternalThread*)value;
2929 struct wait_data *wait = (struct wait_data*)user_data;
2933 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2935 * This needs no locking.
2937 if ((thread->state & ThreadState_Suspended) != 0 ||
2938 (thread->state & ThreadState_Stopped) != 0)
2941 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2942 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2946 wait->handles [wait->num] = handle;
2947 wait->threads [wait->num] = thread;
2953 * mono_thread_suspend_all_other_threads:
2955 * Suspend all managed threads except the finalizer thread and this thread. It is
2956 * not possible to resume them later.
2958 void mono_thread_suspend_all_other_threads (void)
2960 struct wait_data wait_data;
2961 struct wait_data *wait = &wait_data;
2963 gsize self = GetCurrentThreadId ();
2965 guint32 eventidx = 0;
2966 gboolean starting, finished;
2968 memset (wait, 0, sizeof (struct wait_data));
2970 * The other threads could be in an arbitrary state at this point, i.e.
2971 * they could be starting up, shutting down etc. This means that there could be
2972 * threads which are not even in the threads hash table yet.
2976 * First we set a barrier which will be checked by all threads before they
2977 * are added to the threads hash table, and they will exit if the flag is set.
2978 * This ensures that no threads could be added to the hash later.
2979 * We will use shutting_down as the barrier for now.
2981 g_assert (shutting_down);
2984 * We make multiple calls to WaitForMultipleObjects since:
2985 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
2986 * - some threads could exit without becoming suspended
2991 * Make a copy of the hashtable since we can't do anything with
2992 * threads while threads_mutex is held.
2995 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2996 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2997 mono_threads_lock ();
2998 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
2999 mono_threads_unlock ();
3001 events = g_new0 (gpointer, wait->num);
3003 /* Get the suspended events that we'll be waiting for */
3004 for (i = 0; i < wait->num; ++i) {
3005 MonoInternalThread *thread = wait->threads [i];
3006 gboolean signal_suspend = FALSE;
3008 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3009 //CloseHandle (wait->handles [i]);
3010 wait->threads [i] = NULL; /* ignore this thread in next loop */
3014 ensure_synch_cs_set (thread);
3016 EnterCriticalSection (thread->synch_cs);
3018 if (thread->suspended_event == NULL) {
3019 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3020 if (thread->suspended_event == NULL) {
3021 /* Forget this one and go on to the next */
3022 LeaveCriticalSection (thread->synch_cs);
3027 if ((thread->state & ThreadState_Suspended) != 0 ||
3028 (thread->state & ThreadState_StopRequested) != 0 ||
3029 (thread->state & ThreadState_Stopped) != 0) {
3030 LeaveCriticalSection (thread->synch_cs);
3031 CloseHandle (wait->handles [i]);
3032 wait->threads [i] = NULL; /* ignore this thread in next loop */
3036 if ((thread->state & ThreadState_SuspendRequested) == 0)
3037 signal_suspend = TRUE;
3039 events [eventidx++] = thread->suspended_event;
3041 /* Convert abort requests into suspend requests */
3042 if ((thread->state & ThreadState_AbortRequested) != 0)
3043 thread->state &= ~ThreadState_AbortRequested;
3045 thread->state |= ThreadState_SuspendRequested;
3047 LeaveCriticalSection (thread->synch_cs);
3049 /* Signal the thread to suspend */
3050 if (mono_thread_info_new_interrupt_enabled ())
3051 suspend_thread_internal (thread, TRUE);
3052 else if (signal_suspend)
3053 signal_thread_state_change (thread);
3056 /*Only wait on the suspend event if we are using the old path */
3057 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3058 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3059 for (i = 0; i < wait->num; ++i) {
3060 MonoInternalThread *thread = wait->threads [i];
3065 ensure_synch_cs_set (thread);
3067 EnterCriticalSection (thread->synch_cs);
3068 if ((thread->state & ThreadState_Suspended) != 0) {
3069 CloseHandle (thread->suspended_event);
3070 thread->suspended_event = NULL;
3072 LeaveCriticalSection (thread->synch_cs);
3076 if (eventidx <= 0) {
3078 * If there are threads which are starting up, we wait until they
3079 * are suspended when they try to register in the threads hash.
3080 * This is guaranteed to finish, since the threads which can create new
3081 * threads get suspended after a while.
3082 * FIXME: The finalizer thread can still create new threads.
3084 mono_threads_lock ();
3085 if (threads_starting_up)
3086 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3089 mono_threads_unlock ();
3101 collect_threads (gpointer key, gpointer value, gpointer user_data)
3103 MonoInternalThread *thread = (MonoInternalThread*)value;
3104 struct wait_data *wait = (struct wait_data*)user_data;
3107 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3108 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3112 wait->handles [wait->num] = handle;
3113 wait->threads [wait->num] = thread;
3118 static gboolean thread_dump_requested;
3120 static G_GNUC_UNUSED gboolean
3121 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3123 GString *p = (GString*)data;
3124 MonoMethod *method = NULL;
3126 method = frame->ji->method;
3129 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3130 g_string_append_printf (p, " %s\n", location);
3133 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3139 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3141 GString* text = g_string_new (0);
3143 GError *error = NULL;
3146 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3148 g_string_append_printf (text, "\n\"%s\"", name);
3151 else if (thread->threadpool_thread)
3152 g_string_append (text, "\n\"<threadpool thread>\"");
3154 g_string_append (text, "\n\"<unnamed thread>\"");
3157 /* This no longer works with remote unwinding */
3159 wapi_desc = wapi_current_thread_desc ();
3160 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3165 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3166 mono_thread_info_resume (mono_thread_info_get_tid (info));
3168 fprintf (stdout, "%s", text->str);
3170 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3171 OutputDebugStringA(text->str);
3174 g_string_free (text, TRUE);
3179 dump_thread (gpointer key, gpointer value, gpointer user)
3181 MonoInternalThread *thread = (MonoInternalThread *)value;
3182 MonoThreadInfo *info;
3184 if (thread == mono_thread_internal_current ())
3188 FIXME This still can hang if we stop a thread during malloc.
3189 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3190 that takes a callback and runs it with the target suspended.
3191 We probably should loop a bit around trying to get it to either managed code
3194 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3199 print_thread_dump (thread, info);
3203 mono_threads_perform_thread_dump (void)
3205 if (!thread_dump_requested)
3208 printf ("Full thread dump:\n");
3211 * Make a copy of the hashtable since we can't do anything with
3212 * threads while threads_mutex is held.
3214 mono_threads_lock ();
3215 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3216 mono_threads_unlock ();
3218 thread_dump_requested = FALSE;
3222 * mono_threads_request_thread_dump:
3224 * Ask all threads except the current to print their stacktrace to stdout.
3227 mono_threads_request_thread_dump (void)
3229 struct wait_data wait_data;
3230 struct wait_data *wait = &wait_data;
3233 /*The new thread dump code runs out of the finalizer thread. */
3234 if (mono_thread_info_new_interrupt_enabled ()) {
3235 thread_dump_requested = TRUE;
3236 mono_gc_finalize_notify ();
3241 memset (wait, 0, sizeof (struct wait_data));
3244 * Make a copy of the hashtable since we can't do anything with
3245 * threads while threads_mutex is held.
3247 mono_threads_lock ();
3248 mono_g_hash_table_foreach (threads, collect_threads, wait);
3249 mono_threads_unlock ();
3251 for (i = 0; i < wait->num; ++i) {
3252 MonoInternalThread *thread = wait->threads [i];
3254 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3255 (thread != mono_thread_internal_current ()) &&
3256 !thread->thread_dump_requested) {
3257 thread->thread_dump_requested = TRUE;
3259 signal_thread_state_change (thread);
3262 CloseHandle (wait->handles [i]);
3268 gint allocated; /* +1 so that refs [allocated] == NULL */
3272 typedef struct ref_stack RefStack;
3275 ref_stack_new (gint initial_size)
3279 initial_size = MAX (initial_size, 16) + 1;
3280 rs = g_new0 (RefStack, 1);
3281 rs->refs = g_new0 (gpointer, initial_size);
3282 rs->allocated = initial_size;
3287 ref_stack_destroy (gpointer ptr)
3298 ref_stack_push (RefStack *rs, gpointer ptr)
3300 g_assert (rs != NULL);
3302 if (rs->bottom >= rs->allocated) {
3303 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3304 rs->allocated <<= 1;
3305 rs->refs [rs->allocated] = NULL;
3307 rs->refs [rs->bottom++] = ptr;
3311 ref_stack_pop (RefStack *rs)
3313 if (rs == NULL || rs->bottom == 0)
3317 rs->refs [rs->bottom] = NULL;
3321 ref_stack_find (RefStack *rs, gpointer ptr)
3328 for (refs = rs->refs; refs && *refs; refs++) {
3336 * mono_thread_push_appdomain_ref:
3338 * Register that the current thread may have references to objects in domain
3339 * @domain on its stack. Each call to this function should be paired with a
3340 * call to pop_appdomain_ref.
3343 mono_thread_push_appdomain_ref (MonoDomain *domain)
3345 MonoInternalThread *thread = mono_thread_internal_current ();
3348 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3349 SPIN_LOCK (thread->lock_thread_id);
3350 if (thread->appdomain_refs == NULL)
3351 thread->appdomain_refs = ref_stack_new (16);
3352 ref_stack_push (thread->appdomain_refs, domain);
3353 SPIN_UNLOCK (thread->lock_thread_id);
3358 mono_thread_pop_appdomain_ref (void)
3360 MonoInternalThread *thread = mono_thread_internal_current ();
3363 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3364 SPIN_LOCK (thread->lock_thread_id);
3365 ref_stack_pop (thread->appdomain_refs);
3366 SPIN_UNLOCK (thread->lock_thread_id);
3371 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3374 SPIN_LOCK (thread->lock_thread_id);
3375 res = ref_stack_find (thread->appdomain_refs, domain);
3376 SPIN_UNLOCK (thread->lock_thread_id);
3381 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3383 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3386 typedef struct abort_appdomain_data {
3387 struct wait_data wait;
3389 } abort_appdomain_data;
3392 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3394 MonoInternalThread *thread = (MonoInternalThread*)value;
3395 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3396 MonoDomain *domain = data->domain;
3398 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3399 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3401 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3402 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3405 data->wait.handles [data->wait.num] = handle;
3406 data->wait.threads [data->wait.num] = thread;
3409 /* Just ignore the rest, we can't do anything with
3417 * mono_threads_abort_appdomain_threads:
3419 * Abort threads which has references to the given appdomain.
3422 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3424 abort_appdomain_data user_data;
3426 int orig_timeout = timeout;
3429 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3431 start_time = mono_msec_ticks ();
3433 mono_threads_lock ();
3435 user_data.domain = domain;
3436 user_data.wait.num = 0;
3437 /* This shouldn't take any locks */
3438 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3439 mono_threads_unlock ();
3441 if (user_data.wait.num > 0) {
3442 /* Abort the threads outside the threads lock */
3443 for (i = 0; i < user_data.wait.num; ++i)
3444 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3447 * We should wait for the threads either to abort, or to leave the
3448 * domain. We can't do the latter, so we wait with a timeout.
3450 wait_for_tids (&user_data.wait, 100);
3453 /* Update remaining time */
3454 timeout -= mono_msec_ticks () - start_time;
3455 start_time = mono_msec_ticks ();
3457 if (orig_timeout != -1 && timeout < 0)
3460 while (user_data.wait.num > 0);
3462 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3468 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3470 MonoInternalThread *thread = (MonoInternalThread*)value;
3471 MonoDomain *domain = (MonoDomain*)user_data;
3474 /* No locking needed here */
3475 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3477 if (thread->cached_culture_info) {
3478 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3479 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3480 if (obj && obj->vtable->domain == domain)
3481 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3487 * mono_threads_clear_cached_culture:
3489 * Clear the cached_current_culture from all threads if it is in the
3493 mono_threads_clear_cached_culture (MonoDomain *domain)
3495 mono_threads_lock ();
3496 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3497 mono_threads_unlock ();
3501 * mono_thread_get_undeniable_exception:
3503 * Return an exception which needs to be raised when leaving a catch clause.
3504 * This is used for undeniable exception propagation.
3507 mono_thread_get_undeniable_exception (void)
3509 MonoInternalThread *thread = mono_thread_internal_current ();
3511 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3513 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3514 * exception if the thread no longer references a dying appdomain.
3516 thread->abort_exc->trace_ips = NULL;
3517 thread->abort_exc->stack_trace = NULL;
3518 return thread->abort_exc;
3524 #if MONO_SMALL_CONFIG
3525 #define NUM_STATIC_DATA_IDX 4
3526 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3530 #define NUM_STATIC_DATA_IDX 8
3531 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3532 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3536 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3539 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3542 gpointer *static_data = addr;
3543 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3546 if (!static_data [i])
3548 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3549 ptr = static_data [i];
3550 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3551 uintptr_t bmap = static_reference_bitmaps [i][j];
3554 if ((bmap & 1) && *p) {
3565 * mono_alloc_static_data
3567 * Allocate memory blocks for storing threads or context static data
3570 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3572 guint idx = (offset >> 24) - 1;
3575 gpointer* static_data = *static_data_ptr;
3577 static void* tls_desc = NULL;
3578 if (mono_gc_user_markers_supported () && !tls_desc)
3579 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3580 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3581 *static_data_ptr = static_data;
3582 static_data [0] = static_data;
3585 for (i = 1; i <= idx; ++i) {
3586 if (static_data [i])
3588 if (mono_gc_user_markers_supported () && threadlocal)
3589 static_data [i] = g_malloc0 (static_data_size [i]);
3591 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3596 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3599 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3600 if (!static_data [i])
3602 if (mono_gc_user_markers_supported () && threadlocal)
3603 g_free (static_data [i]);
3605 mono_gc_free_fixed (static_data [i]);
3607 mono_gc_free_fixed (static_data);
3611 * mono_init_static_data_info
3613 * Initializes static data counters
3615 static void mono_init_static_data_info (StaticDataInfo *static_data)
3617 static_data->idx = 0;
3618 static_data->offset = 0;
3619 static_data->freelist = NULL;
3623 * mono_alloc_static_data_slot
3625 * Generates an offset for static data. static_data contains the counters
3626 * used to generate it.
3629 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3633 if (!static_data->idx && !static_data->offset) {
3635 * we use the first chunk of the first allocation also as
3636 * an array for the rest of the data
3638 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3640 static_data->offset += align - 1;
3641 static_data->offset &= ~(align - 1);
3642 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3643 static_data->idx ++;
3644 g_assert (size <= static_data_size [static_data->idx]);
3645 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3646 static_data->offset = 0;
3648 offset = static_data->offset | ((static_data->idx + 1) << 24);
3649 static_data->offset += size;
3654 * ensure thread static fields already allocated are valid for thread
3655 * This function is called when a thread is created or on thread attach.
3658 thread_adjust_static_data (MonoInternalThread *thread)
3662 mono_threads_lock ();
3663 if (thread_static_info.offset || thread_static_info.idx > 0) {
3664 /* get the current allocated size */
3665 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3666 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3668 mono_threads_unlock ();
3672 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3674 MonoInternalThread *thread = value;
3675 guint32 offset = GPOINTER_TO_UINT (user);
3677 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3680 static MonoThreadDomainTls*
3681 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3683 MonoThreadDomainTls* prev = NULL;
3684 MonoThreadDomainTls* tmp = static_data->freelist;
3686 if (tmp->size == size) {
3688 prev->next = tmp->next;
3690 static_data->freelist = tmp->next;
3699 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3702 int idx = (offset >> 24) - 1;
3704 if (!static_reference_bitmaps [idx])
3705 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3706 rb = static_reference_bitmaps [idx];
3708 offset /= sizeof (gpointer);
3709 /* offset is now the bitmap offset */
3710 for (i = 0; i < numbits; ++i) {
3711 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3712 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3717 clear_reference_bitmap (guint32 offset, guint32 size)
3719 int idx = (offset >> 24) - 1;
3721 rb = static_reference_bitmaps [idx];
3723 offset /= sizeof (gpointer);
3724 size /= sizeof (gpointer);
3726 /* offset is now the bitmap offset */
3727 for (; offset < size; ++offset)
3728 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3732 * The offset for a special static variable is composed of three parts:
3733 * a bit that indicates the type of static data (0:thread, 1:context),
3734 * an index in the array of chunks of memory for the thread (thread->static_data)
3735 * and an offset in that chunk of mem. This allows allocating less memory in the
3740 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3743 if (static_type == SPECIAL_STATIC_THREAD) {
3744 MonoThreadDomainTls *item;
3745 mono_threads_lock ();
3746 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3747 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3749 offset = item->offset;
3752 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3754 update_tls_reference_bitmap (offset, bitmap, numbits);
3755 /* This can be called during startup */
3756 if (threads != NULL)
3757 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3758 mono_threads_unlock ();
3760 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3761 mono_contexts_lock ();
3762 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3763 mono_contexts_unlock ();
3764 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3770 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3772 /* The high bit means either thread (0) or static (1) data. */
3774 guint32 static_type = (offset & 0x80000000);
3777 offset &= 0x7fffffff;
3778 idx = (offset >> 24) - 1;
3780 if (static_type == 0) {
3781 return get_thread_static_data (thread, offset);
3783 /* Allocate static data block under demand, since we don't have a list
3786 MonoAppContext *context = mono_context_get ();
3787 if (!context->static_data || !context->static_data [idx]) {
3788 mono_contexts_lock ();
3789 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3790 mono_contexts_unlock ();
3792 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3797 mono_get_special_static_data (guint32 offset)
3799 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3808 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3810 MonoInternalThread *thread = value;
3811 TlsOffsetSize *data = user;
3812 int idx = (data->offset >> 24) - 1;
3815 if (!thread->static_data || !thread->static_data [idx])
3817 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3818 mono_gc_bzero (ptr, data->size);
3822 do_free_special_slot (guint32 offset, guint32 size)
3824 guint32 static_type = (offset & 0x80000000);
3825 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3826 if (static_type == 0) {
3828 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3829 data.offset = offset & 0x7fffffff;
3831 clear_reference_bitmap (data.offset, data.size);
3832 if (threads != NULL)
3833 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3834 item->offset = offset;
3837 if (!mono_runtime_is_shutting_down ()) {
3838 item->next = thread_static_info.freelist;
3839 thread_static_info.freelist = item;
3841 /* We could be called during shutdown after mono_thread_cleanup () is called */
3845 /* FIXME: free context static data as well */
3850 do_free_special (gpointer key, gpointer value, gpointer data)
3852 MonoClassField *field = key;
3853 guint32 offset = GPOINTER_TO_UINT (value);
3856 size = mono_type_size (field->type, &align);
3857 do_free_special_slot (offset, size);
3861 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3863 mono_threads_lock ();
3864 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3865 mono_threads_unlock ();
3869 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3871 mono_threads_lock ();
3872 do_free_special_slot (offset, size);
3873 mono_threads_unlock ();
3877 * allocates room in the thread local area for storing an instance of the struct type
3878 * the allocation is kept track of in domain->tlsrec_list.
3881 mono_thread_alloc_tls (MonoReflectionType *type)
3883 MonoDomain *domain = mono_domain_get ();
3885 MonoTlsDataRecord *tlsrec;
3888 gsize default_bitmap [4] = {0};
3889 uint32_t tls_offset;
3893 klass = mono_class_from_mono_type (type->type);
3894 /* TlsDatum is a struct, so we subtract the object header size offset */
3895 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3896 size = mono_type_size (type->type, &align);
3897 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3898 if (bitmap != default_bitmap)
3900 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3901 tlsrec->tls_offset = tls_offset;
3902 tlsrec->size = size;
3903 mono_domain_lock (domain);
3904 tlsrec->next = domain->tlsrec_list;
3905 domain->tlsrec_list = tlsrec;
3906 mono_domain_unlock (domain);
3911 mono_thread_destroy_tls (uint32_t tls_offset)
3913 MonoTlsDataRecord *prev = NULL;
3914 MonoTlsDataRecord *cur;
3916 MonoDomain *domain = mono_domain_get ();
3917 mono_domain_lock (domain);
3918 cur = domain->tlsrec_list;
3920 if (cur->tls_offset == tls_offset) {
3922 prev->next = cur->next;
3924 domain->tlsrec_list = cur->next;
3932 mono_domain_unlock (domain);
3934 mono_special_static_data_free_slot (tls_offset, size);
3938 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3941 mono_thread_destroy_domain_tls (MonoDomain *domain)
3943 while (domain->tlsrec_list)
3944 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3947 static MonoClassField *local_slots = NULL;
3950 /* local tls data to get locals_slot from a thread */
3953 /* index in the locals_slot array */
3958 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3960 LocalSlotID *sid = user_data;
3961 MonoInternalThread *thread = (MonoInternalThread*)value;
3962 MonoArray *slots_array;
3964 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3965 * it is for the right domain, so we need to check if it is allocated an initialized
3966 * for the current thread.
3968 /*g_print ("handling thread %p\n", thread);*/
3969 if (!thread->static_data || !thread->static_data [sid->idx])
3971 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3972 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3974 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3978 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3986 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3988 g_warning ("local_slots field not found in Thread class");
3992 domain = mono_domain_get ();
3993 mono_domain_lock (domain);
3994 if (domain->special_static_fields)
3995 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3996 mono_domain_unlock (domain);
3999 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4000 sid.offset = GPOINTER_TO_UINT (addr);
4001 sid.offset &= 0x7fffffff;
4002 sid.idx = (sid.offset >> 24) - 1;
4003 mono_threads_lock ();
4004 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4005 mono_threads_unlock ();
4007 /* FIXME: clear the slot for MonoAppContexts, too */
4012 static void CALLBACK dummy_apc (ULONG_PTR param)
4016 static guint32 dummy_apc (gpointer param)
4023 * mono_thread_execute_interruption
4025 * Performs the operation that the requested thread state requires (abort,
4028 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4030 ensure_synch_cs_set (thread);
4032 EnterCriticalSection (thread->synch_cs);
4034 /* MonoThread::interruption_requested can only be changed with atomics */
4035 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4036 /* this will consume pending APC calls */
4037 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4038 InterlockedDecrement (&thread_interruption_requested);
4040 /* Clear the interrupted flag of the thread so it can wait again */
4041 wapi_clear_interruption ();
4045 if ((thread->state & ThreadState_AbortRequested) != 0) {
4046 LeaveCriticalSection (thread->synch_cs);
4047 if (thread->abort_exc == NULL) {
4049 * This might be racy, but it has to be called outside the lock
4050 * since it calls managed code.
4052 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4054 return thread->abort_exc;
4056 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4057 self_suspend_internal (thread);
4060 else if ((thread->state & ThreadState_StopRequested) != 0) {
4061 /* FIXME: do this through the JIT? */
4063 LeaveCriticalSection (thread->synch_cs);
4065 mono_thread_exit ();
4067 } else if (thread->pending_exception) {
4070 exc = thread->pending_exception;
4071 thread->pending_exception = NULL;
4073 LeaveCriticalSection (thread->synch_cs);
4075 } else if (thread->thread_interrupt_requested) {
4077 thread->thread_interrupt_requested = FALSE;
4078 LeaveCriticalSection (thread->synch_cs);
4080 return(mono_get_exception_thread_interrupted ());
4083 LeaveCriticalSection (thread->synch_cs);
4089 * mono_thread_request_interruption
4091 * A signal handler can call this method to request the interruption of a
4092 * thread. The result of the interruption will depend on the current state of
4093 * the thread. If the result is an exception that needs to be throw, it is
4094 * provided as return value.
4097 mono_thread_request_interruption (gboolean running_managed)
4099 MonoInternalThread *thread = mono_thread_internal_current ();
4101 /* The thread may already be stopping */
4106 if (thread->interrupt_on_stop &&
4107 thread->state & ThreadState_StopRequested &&
4108 thread->state & ThreadState_Background)
4112 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4114 InterlockedIncrement (&thread_interruption_requested);
4116 if (!running_managed || is_running_protected_wrapper ()) {
4117 /* Can't stop while in unmanaged code. Increase the global interruption
4118 request count. When exiting the unmanaged method the count will be
4119 checked and the thread will be interrupted. */
4122 if (mono_thread_notify_pending_exc_fn && !running_managed)
4123 /* The JIT will notify the thread about the interruption */
4124 /* This shouldn't take any locks */
4125 mono_thread_notify_pending_exc_fn ();
4127 /* this will awake the thread if it is in WaitForSingleObject
4129 /* Our implementation of this function ignores the func argument */
4130 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4134 return mono_thread_execute_interruption (thread);
4138 /*This function should be called by a thread after it has exited all of
4139 * its handle blocks at interruption time.*/
4141 mono_thread_resume_interruption (void)
4143 MonoInternalThread *thread = mono_thread_internal_current ();
4144 gboolean still_aborting;
4146 /* The thread may already be stopping */
4150 ensure_synch_cs_set (thread);
4151 EnterCriticalSection (thread->synch_cs);
4152 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4153 LeaveCriticalSection (thread->synch_cs);
4155 /*This can happen if the protected block called Thread::ResetAbort*/
4156 if (!still_aborting)
4159 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4161 InterlockedIncrement (&thread_interruption_requested);
4164 wapi_self_interrupt ();
4166 return mono_thread_execute_interruption (thread);
4169 gboolean mono_thread_interruption_requested ()
4171 if (thread_interruption_requested) {
4172 MonoInternalThread *thread = mono_thread_internal_current ();
4173 /* The thread may already be stopping */
4175 return (thread->interruption_requested);
4180 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4182 MonoInternalThread *thread = mono_thread_internal_current ();
4184 /* The thread may already be stopping */
4188 mono_debugger_check_interruption ();
4190 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4191 MonoException* exc = mono_thread_execute_interruption (thread);
4192 if (exc) mono_raise_exception (exc);
4197 * Performs the interruption of the current thread, if one has been requested,
4198 * and the thread is not running a protected wrapper.
4200 void mono_thread_interruption_checkpoint ()
4202 mono_thread_interruption_checkpoint_request (FALSE);
4206 * Performs the interruption of the current thread, if one has been requested.
4208 void mono_thread_force_interruption_checkpoint ()
4210 mono_thread_interruption_checkpoint_request (TRUE);
4214 * mono_thread_get_and_clear_pending_exception:
4216 * Return any pending exceptions for the current thread and clear it as a side effect.
4219 mono_thread_get_and_clear_pending_exception (void)
4221 MonoInternalThread *thread = mono_thread_internal_current ();
4223 /* The thread may already be stopping */
4227 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4228 return mono_thread_execute_interruption (thread);
4231 if (thread->pending_exception) {
4232 MonoException *exc = thread->pending_exception;
4234 thread->pending_exception = NULL;
4242 * mono_set_pending_exception:
4244 * Set the pending exception of the current thread to EXC.
4245 * The exception will be thrown when execution returns to managed code.
4248 mono_set_pending_exception (MonoException *exc)
4250 MonoInternalThread *thread = mono_thread_internal_current ();
4252 /* The thread may already be stopping */
4256 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4258 mono_thread_request_interruption (FALSE);
4262 * mono_thread_interruption_request_flag:
4264 * Returns the address of a flag that will be non-zero if an interruption has
4265 * been requested for a thread. The thread to interrupt may not be the current
4266 * thread, so an additional call to mono_thread_interruption_requested() or
4267 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4270 gint32* mono_thread_interruption_request_flag ()
4272 return &thread_interruption_requested;
4276 mono_thread_init_apartment_state (void)
4279 MonoInternalThread* thread = mono_thread_internal_current ();
4281 /* Positive return value indicates success, either
4282 * S_OK if this is first CoInitialize call, or
4283 * S_FALSE if CoInitialize already called, but with same
4284 * threading model. A negative value indicates failure,
4285 * probably due to trying to change the threading model.
4287 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4288 ? COINIT_APARTMENTTHREADED
4289 : COINIT_MULTITHREADED) < 0) {
4290 thread->apartment_state = ThreadApartmentState_Unknown;
4296 mono_thread_cleanup_apartment_state (void)
4299 MonoInternalThread* thread = mono_thread_internal_current ();
4301 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4308 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4310 ensure_synch_cs_set (thread);
4312 EnterCriticalSection (thread->synch_cs);
4313 thread->state |= state;
4314 LeaveCriticalSection (thread->synch_cs);
4318 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4320 ensure_synch_cs_set (thread);
4322 EnterCriticalSection (thread->synch_cs);
4323 thread->state &= ~state;
4324 LeaveCriticalSection (thread->synch_cs);
4328 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4330 gboolean ret = FALSE;
4332 ensure_synch_cs_set (thread);
4334 EnterCriticalSection (thread->synch_cs);
4336 if ((thread->state & test) != 0) {
4340 LeaveCriticalSection (thread->synch_cs);
4345 //static MonoClassField *execution_context_field;
4348 get_execution_context_addr (void)
4350 MonoDomain *domain = mono_domain_get ();
4351 guint32 offset = domain->execution_context_field_offset;
4354 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4357 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4359 mono_domain_lock (domain);
4360 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4361 mono_domain_unlock (domain);
4364 domain->execution_context_field_offset = offset;
4367 return (MonoObject**) mono_get_special_static_data (offset);
4371 mono_thread_get_execution_context (void)
4373 return *get_execution_context_addr ();
4377 mono_thread_set_execution_context (MonoObject *ec)
4379 *get_execution_context_addr () = ec;
4382 static gboolean has_tls_get = FALSE;
4385 mono_runtime_set_has_tls_get (gboolean val)
4391 mono_runtime_has_tls_get (void)
4397 mono_thread_kill (MonoInternalThread *thread, int signal)
4400 /* Win32 uses QueueUserAPC and callers of this are guarded */
4401 g_assert_not_reached ();
4403 # ifdef PTHREAD_POINTER_ID
4404 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4406 # ifdef PLATFORM_ANDROID
4407 if (thread->android_tid != 0) {
4409 int old_errno = errno;
4411 ret = tkill ((pid_t) thread->android_tid, signal);
4420 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4422 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4429 self_interrupt_thread (void *_unused)
4431 MonoThreadInfo *info = mono_thread_info_current ();
4432 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4433 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4434 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4435 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4439 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4443 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4447 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4449 MonoJitInfo **dest = data;
4455 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4457 MonoJitInfo *ji = NULL;
4458 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4463 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4466 MonoThreadInfo *info = NULL;
4467 gboolean protected_wrapper;
4468 gboolean running_managed;
4470 if (!mono_thread_info_new_interrupt_enabled ()) {
4471 signal_thread_state_change (thread);
4476 FIXME this is insanely broken, it doesn't cause interruption to happen
4477 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4479 if (thread == mono_thread_internal_current ()) {
4480 /* Do it synchronously */
4481 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4483 mono_raise_exception (exc);
4485 wapi_interrupt_thread (thread->handle);
4490 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4491 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4495 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4496 mono_thread_info_resume (mono_thread_info_get_tid (info));
4500 /*someone is already interrupting it*/
4501 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4502 mono_thread_info_resume (mono_thread_info_get_tid (info));
4505 InterlockedIncrement (&thread_interruption_requested);
4507 ji = mono_thread_info_get_last_managed (info);
4508 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4509 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4511 if (!protected_wrapper && running_managed) {
4512 /*We are in managed code*/
4513 /*Set the thread to call */
4514 if (install_async_abort)
4515 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4516 mono_thread_info_resume (mono_thread_info_get_tid (info));
4518 gpointer interrupt_handle;
4520 * This will cause waits to be broken.
4521 * It will also prevent the thread from entering a wait, so if the thread returns
4522 * from the wait before it receives the abort signal, it will just spin in the wait
4523 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4527 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4529 mono_thread_info_resume (mono_thread_info_get_tid (info));
4531 wapi_finish_interrupt_thread (interrupt_handle);
4534 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4538 transition_to_suspended (MonoInternalThread *thread)
4540 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4541 g_assert (0); /*FIXME we should not reach this */
4542 /*Make sure we balance the suspend count.*/
4543 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4545 thread->state &= ~ThreadState_SuspendRequested;
4546 thread->state |= ThreadState_Suspended;
4548 LeaveCriticalSection (thread->synch_cs);
4552 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4554 if (!mono_thread_info_new_interrupt_enabled ()) {
4555 signal_thread_state_change (thread);
4559 EnterCriticalSection (thread->synch_cs);
4560 if (thread == mono_thread_internal_current ()) {
4561 transition_to_suspended (thread);
4562 mono_thread_info_self_suspend ();
4564 MonoThreadInfo *info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt);
4565 MonoJitInfo *ji = mono_thread_info_get_last_managed (info);
4566 gboolean protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4567 gboolean running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4569 if (running_managed && !protected_wrapper) {
4570 transition_to_suspended (thread);
4572 gpointer interrupt_handle;
4574 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4575 InterlockedIncrement (&thread_interruption_requested);
4578 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4580 mono_thread_info_resume (mono_thread_info_get_tid (info));
4583 wapi_finish_interrupt_thread (interrupt_handle);
4585 LeaveCriticalSection (thread->synch_cs);
4590 /*This is called with @thread synch_cs held and it must release it*/
4592 self_suspend_internal (MonoInternalThread *thread)
4594 if (!mono_thread_info_new_interrupt_enabled ()) {
4595 thread->state &= ~ThreadState_SuspendRequested;
4596 thread->state |= ThreadState_Suspended;
4597 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4598 if (thread->suspend_event == NULL) {
4599 LeaveCriticalSection (thread->synch_cs);
4602 if (thread->suspended_event)
4603 SetEvent (thread->suspended_event);
4605 LeaveCriticalSection (thread->synch_cs);
4607 if (shutting_down) {
4608 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4613 WaitForSingleObject (thread->suspend_event, INFINITE);
4615 EnterCriticalSection (thread->synch_cs);
4617 CloseHandle (thread->suspend_event);
4618 thread->suspend_event = NULL;
4619 thread->state &= ~ThreadState_Suspended;
4621 /* The thread that requested the resume will have replaced this event
4622 * and will be waiting for it
4624 SetEvent (thread->resume_event);
4626 LeaveCriticalSection (thread->synch_cs);
4630 transition_to_suspended (thread);
4631 mono_thread_info_self_suspend ();
4634 /*This is called with @thread synch_cs held and it must release it*/
4636 resume_thread_internal (MonoInternalThread *thread)
4638 if (!mono_thread_info_new_interrupt_enabled ()) {
4639 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4640 if (thread->resume_event == NULL) {
4641 LeaveCriticalSection (thread->synch_cs);
4645 /* Awake the thread */
4646 SetEvent (thread->suspend_event);
4648 LeaveCriticalSection (thread->synch_cs);
4650 /* Wait for the thread to awake */
4651 WaitForSingleObject (thread->resume_event, INFINITE);
4652 CloseHandle (thread->resume_event);
4653 thread->resume_event = NULL;
4657 LeaveCriticalSection (thread->synch_cs);
4658 /* Awake the thread */
4659 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4661 EnterCriticalSection (thread->synch_cs);
4662 thread->state &= ~ThreadState_Suspended;
4663 LeaveCriticalSection (thread->synch_cs);