2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
20 #if defined(__OpenBSD__) || defined(__FreeBSD__)
22 #include <pthread_np.h>
25 #include <mono/metadata/object.h>
26 #include <mono/metadata/domain-internals.h>
27 #include <mono/metadata/profiler-private.h>
28 #include <mono/metadata/threads.h>
29 #include <mono/metadata/threadpool.h>
30 #include <mono/metadata/threads-types.h>
31 #include <mono/metadata/exception.h>
32 #include <mono/metadata/environment.h>
33 #include <mono/metadata/monitor.h>
34 #include <mono/metadata/gc-internal.h>
35 #include <mono/metadata/marshal.h>
36 #include <mono/io-layer/io-layer.h>
38 #include <mono/io-layer/threads.h>
40 #include <mono/metadata/object-internals.h>
41 #include <mono/metadata/mono-debug-debugger.h>
42 #include <mono/utils/mono-compiler.h>
43 #include <mono/utils/mono-mmap.h>
44 #include <mono/utils/mono-membar.h>
45 #include <mono/utils/mono-time.h>
46 #include <mono/utils/mono-threads.h>
47 #include <mono/utils/hazard-pointer.h>
48 #include <mono/utils/mono-tls.h>
50 #include <mono/metadata/gc-internal.h>
52 #ifdef PLATFORM_ANDROID
55 extern int tkill (pid_t tid, int signal);
58 #if defined(PLATFORM_MACOSX) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
59 void *pthread_get_stackaddr_np(pthread_t);
60 size_t pthread_get_stacksize_np(pthread_t);
63 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
64 #define THREAD_DEBUG(a)
65 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
66 #define THREAD_WAIT_DEBUG(a)
67 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
68 #define LIBGC_DEBUG(a)
70 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
71 #define SPIN_LOCK(i) do { \
72 if (SPIN_TRYLOCK (i)) \
76 #define SPIN_UNLOCK(i) i = 0
78 /* Provide this for systems with glib < 2.6 */
79 #ifndef G_GSIZE_FORMAT
80 # if GLIB_SIZEOF_LONG == 8
81 # define G_GSIZE_FORMAT "lu"
83 # define G_GSIZE_FORMAT "u"
89 guint32 (*func)(void *);
105 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
106 struct _MonoThreadDomainTls {
107 MonoThreadDomainTls *next;
115 MonoThreadDomainTls *freelist;
118 /* Number of cached culture objects in the MonoThread->cached_culture_info array
119 * (per-type): we use the first NUM entries for CultureInfo and the last for
120 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
122 #define NUM_CACHED_CULTURES 4
123 #define CULTURES_START_IDX 0
124 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
126 /* Controls access to the 'threads' hash table */
127 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
128 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
129 static CRITICAL_SECTION threads_mutex;
131 /* Controls access to context static data */
132 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
133 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
134 static CRITICAL_SECTION contexts_mutex;
136 /* Holds current status of static data heap */
137 static StaticDataInfo thread_static_info;
138 static StaticDataInfo context_static_info;
140 /* The hash of existing threads (key is thread ID, value is
141 * MonoInternalThread*) that need joining before exit
143 static MonoGHashTable *threads=NULL;
146 * Threads which are starting up and they are not in the 'threads' hash yet.
147 * When handle_store is called for a thread, it will be removed from this hash table.
148 * Protected by mono_threads_lock ().
150 static MonoGHashTable *threads_starting_up = NULL;
152 /* Maps a MonoThread to its start argument */
153 /* Protected by mono_threads_lock () */
154 static MonoGHashTable *thread_start_args = NULL;
156 /* The TLS key that holds the MonoObject assigned to each thread */
157 static MonoNativeTlsKey current_object_key;
159 #ifdef MONO_HAVE_FAST_TLS
160 /* we need to use both the Tls* functions and __thread because
161 * the gc needs to see all the threads
163 MONO_FAST_TLS_DECLARE(tls_current_object);
164 #define SET_CURRENT_OBJECT(x) do { \
165 MONO_FAST_TLS_SET (tls_current_object, x); \
166 mono_native_tls_set_value (current_object_key, x); \
168 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
170 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
171 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
174 /* function called at thread start */
175 static MonoThreadStartCB mono_thread_start_cb = NULL;
177 /* function called at thread attach */
178 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
180 /* function called at thread cleanup */
181 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
183 /* function called to notify the runtime about a pending exception on the current thread */
184 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
186 /* The default stack size for each thread */
187 static guint32 default_stacksize = 0;
188 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
190 static void thread_adjust_static_data (MonoInternalThread *thread);
191 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
192 static void mono_init_static_data_info (StaticDataInfo *static_data);
193 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
194 static gboolean mono_thread_resume (MonoInternalThread* thread);
195 static void mono_thread_start (MonoThread *thread);
196 static void signal_thread_state_change (MonoInternalThread *thread);
197 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
198 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
199 static void self_suspend_internal (MonoInternalThread *thread);
200 static gboolean resume_thread_internal (MonoInternalThread *thread);
202 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
203 static void ref_stack_destroy (gpointer rs);
205 /* Spin lock for InterlockedXXX 64 bit functions */
206 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
207 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
208 static CRITICAL_SECTION interlocked_mutex;
210 /* global count of thread interruptions requested */
211 static gint32 thread_interruption_requested = 0;
213 /* Event signaled when a thread changes its background mode */
214 static HANDLE background_change_event;
216 static gboolean shutting_down = FALSE;
218 static gint32 managed_thread_id_counter = 0;
221 get_next_managed_thread_id (void)
223 return InterlockedIncrement (&managed_thread_id_counter);
227 mono_thread_get_tls_key (void)
229 return current_object_key;
233 mono_thread_get_tls_offset (void)
236 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
240 /* handle_store() and handle_remove() manage the array of threads that
241 * still need to be waited for when the main thread exits.
243 * If handle_store() returns FALSE the thread must not be started
244 * because Mono is shutting down.
246 static gboolean handle_store(MonoThread *thread)
248 mono_threads_lock ();
250 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
252 if (threads_starting_up)
253 mono_g_hash_table_remove (threads_starting_up, thread);
256 mono_threads_unlock ();
261 MONO_GC_REGISTER_ROOT_FIXED (threads);
262 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
265 /* We don't need to duplicate thread->handle, because it is
266 * only closed when the thread object is finalized by the GC.
268 g_assert (thread->internal_thread);
269 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
270 thread->internal_thread);
272 mono_threads_unlock ();
277 static gboolean handle_remove(MonoInternalThread *thread)
280 gsize tid = thread->tid;
282 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
284 mono_threads_lock ();
287 /* We have to check whether the thread object for the
288 * tid is still the same in the table because the
289 * thread might have been destroyed and the tid reused
290 * in the meantime, in which case the tid would be in
291 * the table, but with another thread object.
293 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
294 mono_g_hash_table_remove (threads, (gpointer)tid);
303 mono_threads_unlock ();
305 /* Don't close the handle here, wait for the object finalizer
306 * to do it. Otherwise, the following race condition applies:
308 * 1) Thread exits (and handle_remove() closes the handle)
310 * 2) Some other handle is reassigned the same slot
312 * 3) Another thread tries to join the first thread, and
313 * blocks waiting for the reassigned handle to be signalled
314 * (which might never happen). This is possible, because the
315 * thread calling Join() still has a reference to the first
321 static void ensure_synch_cs_set (MonoInternalThread *thread)
323 CRITICAL_SECTION *synch_cs;
325 if (thread->synch_cs != NULL) {
329 synch_cs = g_new0 (CRITICAL_SECTION, 1);
330 InitializeCriticalSection (synch_cs);
332 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
333 synch_cs, NULL) != NULL) {
334 /* Another thread must have installed this CS */
335 DeleteCriticalSection (synch_cs);
341 * NOTE: this function can be called also for threads different from the current one:
342 * make sure no code called from it will ever assume it is run on the thread that is
343 * getting cleaned up.
345 static void thread_cleanup (MonoInternalThread *thread)
347 g_assert (thread != NULL);
349 if (thread->abort_state_handle) {
350 mono_gchandle_free (thread->abort_state_handle);
351 thread->abort_state_handle = 0;
353 thread->abort_exc = NULL;
354 thread->current_appcontext = NULL;
357 * This is necessary because otherwise we might have
358 * cross-domain references which will not get cleaned up when
359 * the target domain is unloaded.
361 if (thread->cached_culture_info) {
363 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
364 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
367 ensure_synch_cs_set (thread);
369 EnterCriticalSection (thread->synch_cs);
371 thread->state |= ThreadState_Stopped;
372 thread->state &= ~ThreadState_Background;
374 LeaveCriticalSection (thread->synch_cs);
377 An interruption request has leaked to cleanup. Adjust the global counter.
379 This can happen is the abort source thread finds the abortee (this) thread
380 in unmanaged code. If this thread never trips back to managed code or check
381 the local flag it will be left set and positively unbalance the global counter.
383 Leaving the counter unbalanced will cause a performance degradation since all threads
384 will now keep checking their local flags all the time.
386 if (InterlockedExchange (&thread->interruption_requested, 0))
387 InterlockedDecrement (&thread_interruption_requested);
389 /* if the thread is not in the hash it has been removed already */
390 if (!handle_remove (thread)) {
391 /* This needs to be called even if handle_remove () fails */
392 if (mono_thread_cleanup_fn)
393 mono_thread_cleanup_fn (thread);
396 mono_release_type_locks (thread);
398 mono_profiler_thread_end (thread->tid);
400 if (thread == mono_thread_internal_current ())
401 mono_thread_pop_appdomain_ref ();
403 thread->cached_culture_info = NULL;
405 mono_free_static_data (thread->static_data, TRUE);
406 thread->static_data = NULL;
407 ref_stack_destroy (thread->appdomain_refs);
408 thread->appdomain_refs = NULL;
410 if (mono_thread_cleanup_fn)
411 mono_thread_cleanup_fn (thread);
413 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
417 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
420 g_assert ((offset & 0x80000000) == 0);
421 offset &= 0x7fffffff;
422 idx = (offset >> 24) - 1;
423 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
427 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
429 static MonoClassField *current_thread_field = NULL;
433 if (!current_thread_field) {
434 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
435 g_assert (current_thread_field);
438 mono_class_vtable (domain, mono_defaults.thread_class);
439 mono_domain_lock (domain);
440 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
441 mono_domain_unlock (domain);
444 return get_thread_static_data (thread, offset);
448 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
450 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
452 g_assert (current->obj.vtable->domain == domain);
454 g_assert (!*current_thread_ptr);
455 *current_thread_ptr = current;
458 static MonoInternalThread*
459 create_internal_thread_object (void)
461 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
462 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
466 create_thread_object (MonoDomain *domain)
468 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
469 return (MonoThread*)mono_gc_alloc_mature (vt);
473 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
475 MonoThread *thread = create_thread_object (domain);
476 MONO_OBJECT_SETREF (thread, internal_thread, internal);
481 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
483 MonoDomain *domain = mono_get_root_domain ();
485 if (!candidate || candidate->obj.vtable->domain != domain)
486 candidate = new_thread_with_internal (domain, thread);
487 set_current_thread_for_domain (domain, thread, candidate);
488 g_assert (!thread->root_domain_thread);
489 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
492 static guint32 WINAPI start_wrapper_internal(void *data)
494 MonoThreadInfo *info;
495 struct StartInfo *start_info=(struct StartInfo *)data;
496 guint32 (*start_func)(void *);
500 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
503 MonoInternalThread *internal = start_info->obj->internal_thread;
504 MonoObject *start_delegate = start_info->delegate;
505 MonoDomain *domain = start_info->obj->obj.vtable->domain;
507 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
509 /* We can be sure start_info->obj->tid and
510 * start_info->obj->handle have been set, because the thread
511 * was created suspended, and these values were set before the
515 info = mono_thread_info_current ();
517 internal->thread_info = info;
522 SET_CURRENT_OBJECT (internal);
524 mono_monitor_init_tls ();
526 /* Every thread references the appdomain which created it */
527 mono_thread_push_appdomain_ref (domain);
529 if (!mono_domain_set (domain, FALSE)) {
530 /* No point in raising an appdomain_unloaded exception here */
531 /* FIXME: Cleanup here */
532 mono_thread_pop_appdomain_ref ();
536 start_func = start_info->func;
537 start_arg = start_info->start_arg;
539 /* We have to do this here because mono_thread_new_init()
540 requires that root_domain_thread is set up. */
541 thread_adjust_static_data (internal);
542 init_root_domain_thread (internal, start_info->obj);
544 /* This MUST be called before any managed code can be
545 * executed, as it calls the callback function that (for the
546 * jit) sets the lmf marker.
548 mono_thread_new_init (tid, &tid, start_func);
549 internal->stack_ptr = &tid;
551 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
553 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
555 /* On 2.0 profile (and higher), set explicitly since state might have been
557 if (internal->apartment_state == ThreadApartmentState_Unknown)
558 internal->apartment_state = ThreadApartmentState_MTA;
560 mono_thread_init_apartment_state ();
562 if(internal->start_notify!=NULL) {
563 /* Let the thread that called Start() know we're
566 ReleaseSemaphore (internal->start_notify, 1, NULL);
569 mono_threads_lock ();
570 mono_g_hash_table_remove (thread_start_args, start_info->obj);
571 mono_threads_unlock ();
573 mono_thread_set_execution_context (start_info->obj->ec_to_set);
574 start_info->obj->ec_to_set = NULL;
577 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
581 * Call this after calling start_notify, since the profiler callback might want
582 * to lock the thread, and the lock is held by thread_start () which waits for
585 mono_profiler_thread_start (tid);
587 /* start_func is set only for unmanaged start functions */
589 start_func (start_arg);
592 g_assert (start_delegate != NULL);
593 args [0] = start_arg;
594 /* we may want to handle the exception here. See comment below on unhandled exceptions */
595 mono_runtime_delegate_invoke (start_delegate, args, NULL);
598 /* If the thread calls ExitThread at all, this remaining code
599 * will not be executed, but the main thread will eventually
600 * call thread_cleanup() on this thread's behalf.
603 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
605 thread_cleanup (internal);
607 /* Do any cleanup needed for apartment state. This
608 * cannot be done in thread_cleanup since thread_cleanup could be
609 * called for a thread other than the current thread.
610 * mono_thread_cleanup_apartment_state cleans up apartment
611 * for the current thead */
612 mono_thread_cleanup_apartment_state ();
614 /* Remove the reference to the thread object in the TLS data,
615 * so the thread object can be finalized. This won't be
616 * reached if the thread threw an uncaught exception, so those
617 * thread handles will stay referenced :-( (This is due to
618 * missing support for scanning thread-specific data in the
619 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
622 SET_CURRENT_OBJECT (NULL);
623 mono_domain_unset ();
628 static guint32 WINAPI start_wrapper(void *data)
632 /* Avoid scanning the frames above this frame during a GC */
633 mono_gc_set_stack_end ((void*)&dummy);
635 return start_wrapper_internal (data);
638 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
640 if (mono_thread_start_cb) {
641 mono_thread_start_cb (tid, stack_start, func);
645 void mono_threads_set_default_stacksize (guint32 stacksize)
647 default_stacksize = stacksize;
650 guint32 mono_threads_get_default_stacksize (void)
652 return default_stacksize;
656 * mono_create_thread:
658 * This is a wrapper around CreateThread which handles differences in the type of
659 * the the 'tid' argument.
661 gpointer mono_create_thread (WapiSecurityAttributes *security,
662 guint32 stacksize, WapiThreadStart start,
663 gpointer param, guint32 create, gsize *tid)
670 res = mono_threads_CreateThread (security, stacksize, start, param, create, &real_tid);
674 res = CreateThread (security, stacksize, start, param, create, tid);
681 * The thread start argument may be an object reference, and there is
682 * no ref to keep it alive when the new thread is started but not yet
683 * registered with the collector. So we store it in a GC tracked hash
686 * LOCKING: Assumes the threads lock is held.
689 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
691 if (thread_start_args == NULL) {
692 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
693 thread_start_args = mono_g_hash_table_new (NULL, NULL);
695 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
698 MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
701 MonoInternalThread *internal;
702 HANDLE thread_handle;
703 struct StartInfo *start_info;
706 thread = create_thread_object (domain);
707 internal = create_internal_thread_object ();
708 MONO_OBJECT_SETREF (thread, internal_thread, internal);
710 start_info=g_new0 (struct StartInfo, 1);
711 start_info->func = func;
712 start_info->obj = thread;
713 start_info->start_arg = arg;
715 mono_threads_lock ();
717 mono_threads_unlock ();
721 if (threads_starting_up == NULL) {
722 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
723 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
726 register_thread_start_argument (thread, start_info);
727 mono_g_hash_table_insert (threads_starting_up, thread, thread);
728 mono_threads_unlock ();
731 stack_size = default_stacksize_for_thread (internal);
733 /* Create suspended, so we can do some housekeeping before the thread
736 thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
737 CREATE_SUSPENDED, &tid);
738 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
739 if (thread_handle == NULL) {
740 /* The thread couldn't be created, so throw an exception */
741 mono_threads_lock ();
742 mono_g_hash_table_remove (threads_starting_up, thread);
743 mono_threads_unlock ();
745 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
749 internal->handle=thread_handle;
751 internal->apartment_state=ThreadApartmentState_Unknown;
752 internal->thread_pinning_ref = internal;
753 internal->managed_id = get_next_managed_thread_id ();
754 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
756 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
757 InitializeCriticalSection (internal->synch_cs);
759 internal->threadpool_thread = threadpool_thread;
760 if (threadpool_thread)
761 mono_thread_set_state (internal, ThreadState_Background);
763 if (handle_store (thread))
764 ResumeThread (thread_handle);
766 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
767 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
773 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
775 mono_thread_create_internal (domain, func, arg, FALSE, 0);
779 * mono_thread_get_stack_bounds:
781 * Return the address and size of the current threads stack. Return NULL as the
782 * stack address if the stack address cannot be determined.
785 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
787 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
788 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
789 *stsize = pthread_get_stacksize_np (pthread_self ());
791 /* staddr points to the start of the stack, not the end */
793 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
795 /* FIXME: simplify the mess below */
796 #elif !defined(HOST_WIN32)
798 guint8 *current = (guint8*)&attr;
800 pthread_attr_init (&attr);
801 # ifdef HAVE_PTHREAD_GETATTR_NP
802 pthread_getattr_np (pthread_self(), &attr);
804 # ifdef HAVE_PTHREAD_ATTR_GET_NP
805 pthread_attr_get_np (pthread_self(), &attr);
808 pthread_attr_getstacksize (&attr, &stsize);
809 # elif defined(__OpenBSD__)
813 rslt = pthread_stackseg_np(pthread_self(), &ss);
814 g_assert (rslt == 0);
816 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
817 *stsize = ss.ss_size;
826 # if !defined(__OpenBSD__)
827 pthread_attr_getstack (&attr, (void**)staddr, stsize);
830 g_assert ((current > *staddr) && (current < *staddr + *stsize));
833 pthread_attr_destroy (&attr);
836 *stsize = (size_t)-1;
839 /* When running under emacs, sometimes staddr is not aligned to a page size */
840 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
844 mono_thread_attach (MonoDomain *domain)
846 MonoInternalThread *thread;
847 MonoThread *current_thread;
848 HANDLE thread_handle;
851 if ((thread = mono_thread_internal_current ())) {
852 if (domain != mono_domain_get ())
853 mono_domain_set (domain, TRUE);
854 /* Already attached */
855 return mono_thread_current ();
858 if (!mono_gc_register_thread (&domain)) {
859 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 ());
862 thread = create_internal_thread_object ();
864 thread_handle = GetCurrentThread ();
865 g_assert (thread_handle);
867 tid=GetCurrentThreadId ();
870 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
871 * refer to the thread from other threads for things like aborting.
873 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
874 THREAD_ALL_ACCESS, TRUE, 0);
876 thread->handle=thread_handle;
878 #ifdef PLATFORM_ANDROID
879 thread->android_tid = (gpointer) gettid ();
881 thread->apartment_state=ThreadApartmentState_Unknown;
882 thread->thread_pinning_ref = thread;
883 thread->managed_id = get_next_managed_thread_id ();
884 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
886 thread->stack_ptr = &tid;
888 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
889 InitializeCriticalSection (thread->synch_cs);
891 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
893 current_thread = new_thread_with_internal (domain, thread);
895 if (!handle_store (current_thread)) {
896 /* Mono is shutting down, so just wait for the end */
901 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
903 SET_CURRENT_OBJECT (thread);
904 mono_domain_set (domain, TRUE);
906 mono_monitor_init_tls ();
908 thread_adjust_static_data (thread);
910 init_root_domain_thread (thread, current_thread);
911 if (domain != mono_get_root_domain ())
912 set_current_thread_for_domain (domain, thread, current_thread);
915 if (mono_thread_attach_cb) {
919 mono_thread_get_stack_bounds (&staddr, &stsize);
922 mono_thread_attach_cb (tid, &tid);
924 mono_thread_attach_cb (tid, staddr + stsize);
927 // FIXME: Need a separate callback
928 mono_profiler_thread_start (tid);
930 return current_thread;
934 mono_thread_detach (MonoThread *thread)
936 g_return_if_fail (thread != NULL);
938 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
940 mono_profiler_thread_end (thread->internal_thread->tid);
942 thread_cleanup (thread->internal_thread);
944 SET_CURRENT_OBJECT (NULL);
945 mono_domain_unset ();
947 /* Don't need to CloseHandle this thread, even though we took a
948 * reference in mono_thread_attach (), because the GC will do it
949 * when the Thread object is finalised.
956 MonoInternalThread *thread = mono_thread_internal_current ();
958 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
960 thread_cleanup (thread);
961 SET_CURRENT_OBJECT (NULL);
962 mono_domain_unset ();
964 /* we could add a callback here for embedders to use. */
965 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
966 exit (mono_environment_exitcode_get ());
971 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
973 MonoInternalThread *internal = create_internal_thread_object ();
975 internal->state = ThreadState_Unstarted;
976 internal->apartment_state = ThreadApartmentState_Unknown;
977 internal->managed_id = get_next_managed_thread_id ();
979 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
982 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
985 guint32 (*start_func)(void *);
986 struct StartInfo *start_info;
989 MonoInternalThread *internal;
991 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
993 if (!this->internal_thread)
994 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
995 internal = this->internal_thread;
997 ensure_synch_cs_set (internal);
999 EnterCriticalSection (internal->synch_cs);
1001 if ((internal->state & ThreadState_Unstarted) == 0) {
1002 LeaveCriticalSection (internal->synch_cs);
1003 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1007 if ((internal->state & ThreadState_Aborted) != 0) {
1008 LeaveCriticalSection (internal->synch_cs);
1013 /* This is freed in start_wrapper */
1014 start_info = g_new0 (struct StartInfo, 1);
1015 start_info->func = start_func;
1016 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1017 start_info->delegate = start;
1018 start_info->obj = this;
1019 g_assert (this->obj.vtable->domain == mono_domain_get ());
1021 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1022 if (internal->start_notify==NULL) {
1023 LeaveCriticalSection (internal->synch_cs);
1024 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1025 g_free (start_info);
1029 mono_threads_lock ();
1030 register_thread_start_argument (this, start_info);
1031 if (threads_starting_up == NULL) {
1032 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1033 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1035 mono_g_hash_table_insert (threads_starting_up, this, this);
1036 mono_threads_unlock ();
1038 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1039 CREATE_SUSPENDED, &tid);
1041 LeaveCriticalSection (internal->synch_cs);
1042 mono_threads_lock ();
1043 mono_g_hash_table_remove (threads_starting_up, this);
1044 mono_threads_unlock ();
1045 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1049 internal->handle=thread;
1051 internal->thread_pinning_ref = internal;
1052 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1055 /* Don't call handle_store() here, delay it to Start.
1056 * We can't join a thread (trying to will just block
1057 * forever) until it actually starts running, so don't
1058 * store the handle till then.
1061 mono_thread_start (this);
1063 internal->state &= ~ThreadState_Unstarted;
1065 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1067 LeaveCriticalSection (internal->synch_cs);
1072 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1074 MONO_ARCH_SAVE_REGS;
1076 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1079 CloseHandle (thread);
1081 if (this->synch_cs) {
1082 CRITICAL_SECTION *synch_cs = this->synch_cs;
1083 this->synch_cs = NULL;
1084 DeleteCriticalSection (synch_cs);
1089 void *name = this->name;
1095 static void mono_thread_start (MonoThread *thread)
1097 MonoInternalThread *internal = thread->internal_thread;
1099 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1101 /* Only store the handle when the thread is about to be
1102 * launched, to avoid the main thread deadlocking while trying
1103 * to clean up a thread that will never be signalled.
1105 if (!handle_store (thread))
1108 ResumeThread (internal->handle);
1110 if(internal->start_notify!=NULL) {
1111 /* Wait for the thread to set up its TLS data etc, so
1112 * theres no potential race condition if someone tries
1113 * to look up the data believing the thread has
1117 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1119 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1120 CloseHandle (internal->start_notify);
1121 internal->start_notify = NULL;
1124 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1127 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1130 MonoInternalThread *thread = mono_thread_internal_current ();
1132 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1134 mono_thread_current_check_pending_interrupt ();
1137 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1139 res = SleepEx(ms,TRUE);
1141 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1143 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1144 MonoException* exc = mono_thread_execute_interruption (thread);
1146 mono_raise_exception (exc);
1158 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1163 ves_icall_System_Threading_Thread_GetDomainID (void)
1165 MONO_ARCH_SAVE_REGS;
1167 return mono_domain_get()->domain_id;
1171 ves_icall_System_Threading_Thread_Yield (void)
1174 return SwitchToThread ();
1176 return sched_yield () == 0;
1181 * mono_thread_get_name:
1183 * Return the name of the thread. NAME_LEN is set to the length of the name.
1184 * Return NULL if the thread has no name. The returned memory is owned by the
1188 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1192 ensure_synch_cs_set (this_obj);
1194 EnterCriticalSection (this_obj->synch_cs);
1196 if (!this_obj->name) {
1200 *name_len = this_obj->name_len;
1201 res = g_new (gunichar2, this_obj->name_len);
1202 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1205 LeaveCriticalSection (this_obj->synch_cs);
1211 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1215 ensure_synch_cs_set (this_obj);
1217 EnterCriticalSection (this_obj->synch_cs);
1219 if (!this_obj->name)
1222 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1224 LeaveCriticalSection (this_obj->synch_cs);
1230 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1232 ensure_synch_cs_set (this_obj);
1234 EnterCriticalSection (this_obj->synch_cs);
1236 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1237 LeaveCriticalSection (this_obj->synch_cs);
1239 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1243 this_obj->name = g_new (gunichar2, mono_string_length (name));
1244 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1245 this_obj->name_len = mono_string_length (name);
1248 this_obj->name = NULL;
1251 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1253 LeaveCriticalSection (this_obj->synch_cs);
1254 if (this_obj->name) {
1255 char *tname = mono_string_to_utf8 (name);
1256 mono_profiler_thread_name (this_obj->tid, tname);
1262 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1264 mono_thread_set_name_internal (this_obj, name, TRUE);
1267 /* If the array is already in the requested domain, we just return it,
1268 otherwise we return a copy in that domain. */
1270 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1277 if (mono_object_domain (arr) == domain)
1280 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1281 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1286 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1288 return byte_array_to_domain (arr, mono_get_root_domain ());
1292 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1294 return byte_array_to_domain (arr, mono_domain_get ());
1298 mono_thread_current (void)
1300 MonoDomain *domain = mono_domain_get ();
1301 MonoInternalThread *internal = mono_thread_internal_current ();
1302 MonoThread **current_thread_ptr;
1304 g_assert (internal);
1305 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1307 if (!*current_thread_ptr) {
1308 g_assert (domain != mono_get_root_domain ());
1309 *current_thread_ptr = new_thread_with_internal (domain, internal);
1311 return *current_thread_ptr;
1315 mono_thread_internal_current (void)
1317 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1318 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1322 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1323 int ms, HANDLE thread)
1325 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1328 mono_thread_current_check_pending_interrupt ();
1330 ensure_synch_cs_set (this);
1332 EnterCriticalSection (this->synch_cs);
1334 if ((this->state & ThreadState_Unstarted) != 0) {
1335 LeaveCriticalSection (this->synch_cs);
1337 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1341 LeaveCriticalSection (this->synch_cs);
1346 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1348 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1350 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1352 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1354 if(ret==WAIT_OBJECT_0) {
1355 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1360 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1366 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1374 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1377 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1379 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1381 if (ret != WAIT_IO_COMPLETION)
1384 exc = mono_thread_execute_interruption (thread);
1386 mono_raise_exception (exc);
1391 /* Re-calculate ms according to the time passed */
1392 diff_ms = (mono_100ns_ticks () - start) / 10000;
1393 if (diff_ms >= ms) {
1397 wait = ms - diff_ms;
1403 /* FIXME: exitContext isnt documented */
1404 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1410 MonoObject *waitHandle;
1411 MonoInternalThread *thread = mono_thread_internal_current ();
1413 /* Do this WaitSleepJoin check before creating objects */
1414 mono_thread_current_check_pending_interrupt ();
1416 numhandles = mono_array_length(mono_handles);
1417 handles = g_new0(HANDLE, numhandles);
1419 for(i = 0; i < numhandles; i++) {
1420 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1421 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1428 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1430 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1432 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1436 if(ret==WAIT_FAILED) {
1437 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1439 } else if(ret==WAIT_TIMEOUT) {
1440 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1447 /* FIXME: exitContext isnt documented */
1448 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1450 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1454 MonoObject *waitHandle;
1455 MonoInternalThread *thread = mono_thread_internal_current ();
1457 /* Do this WaitSleepJoin check before creating objects */
1458 mono_thread_current_check_pending_interrupt ();
1460 numhandles = mono_array_length(mono_handles);
1461 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1464 for(i = 0; i < numhandles; i++) {
1465 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1466 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1473 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1475 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1477 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1479 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1482 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1484 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1485 return ret - WAIT_OBJECT_0;
1487 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1488 return ret - WAIT_ABANDONED_0;
1495 /* FIXME: exitContext isnt documented */
1496 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1499 MonoInternalThread *thread = mono_thread_internal_current ();
1501 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1507 mono_thread_current_check_pending_interrupt ();
1509 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1511 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1513 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1515 if(ret==WAIT_FAILED) {
1516 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1518 } else if(ret==WAIT_TIMEOUT) {
1519 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1527 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1530 MonoInternalThread *thread = mono_thread_internal_current ();
1532 MONO_ARCH_SAVE_REGS;
1537 mono_thread_current_check_pending_interrupt ();
1539 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1541 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1543 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1545 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1548 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1552 MONO_ARCH_SAVE_REGS;
1557 mutex = CreateMutex (NULL, owned, NULL);
1559 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1561 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1569 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1570 MONO_ARCH_SAVE_REGS;
1572 return(ReleaseMutex (handle));
1575 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1581 MONO_ARCH_SAVE_REGS;
1583 *error = ERROR_SUCCESS;
1585 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1587 *error = GetLastError ();
1594 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1598 MONO_ARCH_SAVE_REGS;
1603 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1605 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1606 mono_string_chars (name));
1608 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1616 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1620 MONO_ARCH_SAVE_REGS;
1622 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1627 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1631 MONO_ARCH_SAVE_REGS;
1633 *error = ERROR_SUCCESS;
1635 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1637 *error = GetLastError ();
1643 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1647 MONO_ARCH_SAVE_REGS;
1652 event = CreateEvent (NULL, manual, initial, NULL);
1654 event = CreateEvent (NULL, manual, initial,
1655 mono_string_chars (name));
1657 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1665 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1666 MONO_ARCH_SAVE_REGS;
1668 return (SetEvent(handle));
1671 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1672 MONO_ARCH_SAVE_REGS;
1674 return (ResetEvent(handle));
1678 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1679 MONO_ARCH_SAVE_REGS;
1681 CloseHandle (handle);
1684 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1690 MONO_ARCH_SAVE_REGS;
1692 *error = ERROR_SUCCESS;
1694 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1696 *error = GetLastError ();
1702 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1704 MONO_ARCH_SAVE_REGS;
1706 return InterlockedIncrement (location);
1709 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1713 MONO_ARCH_SAVE_REGS;
1715 mono_interlocked_lock ();
1719 mono_interlocked_unlock ();
1725 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1727 MONO_ARCH_SAVE_REGS;
1729 return InterlockedDecrement(location);
1732 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1736 MONO_ARCH_SAVE_REGS;
1738 mono_interlocked_lock ();
1742 mono_interlocked_unlock ();
1747 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1749 MONO_ARCH_SAVE_REGS;
1751 return InterlockedExchange(location, value);
1754 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1757 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1758 mono_gc_wbarrier_generic_nostore (location);
1762 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1764 return InterlockedExchangePointer(location, value);
1767 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1769 IntFloatUnion val, ret;
1771 MONO_ARCH_SAVE_REGS;
1774 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1780 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1782 #if SIZEOF_VOID_P == 8
1783 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1788 * According to MSDN, this function is only atomic with regards to the
1789 * other Interlocked functions on 32 bit platforms.
1791 mono_interlocked_lock ();
1794 mono_interlocked_unlock ();
1801 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1803 #if SIZEOF_VOID_P == 8
1804 LongDoubleUnion val, ret;
1807 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1814 * According to MSDN, this function is only atomic with regards to the
1815 * other Interlocked functions on 32 bit platforms.
1817 mono_interlocked_lock ();
1820 mono_interlocked_unlock ();
1826 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1828 MONO_ARCH_SAVE_REGS;
1830 return InterlockedCompareExchange(location, value, comparand);
1833 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1836 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1837 mono_gc_wbarrier_generic_nostore (location);
1841 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1843 return InterlockedCompareExchangePointer(location, value, comparand);
1846 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1848 IntFloatUnion val, ret, cmp;
1850 MONO_ARCH_SAVE_REGS;
1853 cmp.fval = comparand;
1854 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1860 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1862 #if SIZEOF_VOID_P == 8
1863 LongDoubleUnion val, comp, ret;
1866 comp.fval = comparand;
1867 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1873 mono_interlocked_lock ();
1875 if (old == comparand)
1877 mono_interlocked_unlock ();
1884 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1886 #if SIZEOF_VOID_P == 8
1887 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1891 mono_interlocked_lock ();
1893 if (old == comparand)
1895 mono_interlocked_unlock ();
1902 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1905 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1906 mono_gc_wbarrier_generic_nostore (location);
1911 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1914 res = InterlockedExchangePointer ((gpointer *)location, value);
1915 mono_gc_wbarrier_generic_nostore (location);
1920 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1922 #if SIZEOF_VOID_P == 8
1923 /* Should be implemented as a JIT intrinsic */
1924 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1929 mono_interlocked_lock ();
1931 *location = orig + value;
1932 mono_interlocked_unlock ();
1934 return orig + value;
1939 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1941 #if SIZEOF_VOID_P == 8
1942 /* Should be implemented as a JIT intrinsic */
1943 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1948 mono_interlocked_lock ();
1950 *location = orig + value;
1951 mono_interlocked_unlock ();
1953 return orig + value;
1958 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1960 #if SIZEOF_VOID_P == 8
1961 /* 64 bit reads are already atomic */
1966 mono_interlocked_lock ();
1968 mono_interlocked_unlock ();
1975 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1977 mono_threads_lock ();
1978 mono_threads_unlock ();
1982 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1984 mono_thread_clr_state (this, state);
1986 if (state & ThreadState_Background) {
1987 /* If the thread changes the background mode, the main thread has to
1988 * be notified, since it has to rebuild the list of threads to
1991 SetEvent (background_change_event);
1996 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1998 mono_thread_set_state (this, state);
2000 if (state & ThreadState_Background) {
2001 /* If the thread changes the background mode, the main thread has to
2002 * be notified, since it has to rebuild the list of threads to
2005 SetEvent (background_change_event);
2010 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2014 ensure_synch_cs_set (this);
2016 EnterCriticalSection (this->synch_cs);
2018 state = this->state;
2020 LeaveCriticalSection (this->synch_cs);
2025 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2027 MonoInternalThread *current;
2030 ensure_synch_cs_set (this);
2032 current = mono_thread_internal_current ();
2034 EnterCriticalSection (this->synch_cs);
2036 this->thread_interrupt_requested = TRUE;
2037 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2039 LeaveCriticalSection (this->synch_cs);
2042 abort_thread_internal (this, TRUE, FALSE);
2046 void mono_thread_current_check_pending_interrupt ()
2048 MonoInternalThread *thread = mono_thread_internal_current ();
2049 gboolean throw = FALSE;
2051 mono_debugger_check_interruption ();
2053 ensure_synch_cs_set (thread);
2055 EnterCriticalSection (thread->synch_cs);
2057 if (thread->thread_interrupt_requested) {
2059 thread->thread_interrupt_requested = FALSE;
2062 LeaveCriticalSection (thread->synch_cs);
2065 mono_raise_exception (mono_get_exception_thread_interrupted ());
2070 mono_thread_get_abort_signal (void)
2082 static int abort_signum = -1;
2084 if (abort_signum != -1)
2085 return abort_signum;
2086 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2087 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2088 struct sigaction sinfo;
2089 sigaction (i, NULL, &sinfo);
2090 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2095 /* fallback to the old way */
2098 #endif /* HOST_WIN32 */
2102 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2104 MonoException* exc = mono_thread_request_interruption (FALSE);
2105 if (exc) mono_raise_exception (exc);
2107 #endif /* HOST_WIN32 */
2110 * signal_thread_state_change
2112 * Tells the thread that his state has changed and it has to enter the new
2113 * state as soon as possible.
2115 static void signal_thread_state_change (MonoInternalThread *thread)
2117 if (thread == mono_thread_internal_current ()) {
2118 /* Do it synchronously */
2119 MonoException *exc = mono_thread_request_interruption (FALSE);
2121 mono_raise_exception (exc);
2125 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2127 /* fixme: store the state somewhere */
2128 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2131 * This will cause waits to be broken.
2132 * It will also prevent the thread from entering a wait, so if the thread returns
2133 * from the wait before it receives the abort signal, it will just spin in the wait
2134 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2137 wapi_interrupt_thread (thread->handle);
2138 #endif /* HOST_WIN32 */
2142 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2144 ensure_synch_cs_set (thread);
2146 EnterCriticalSection (thread->synch_cs);
2148 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2149 (thread->state & ThreadState_StopRequested) != 0 ||
2150 (thread->state & ThreadState_Stopped) != 0)
2152 LeaveCriticalSection (thread->synch_cs);
2156 if ((thread->state & ThreadState_Unstarted) != 0) {
2157 thread->state |= ThreadState_Aborted;
2158 LeaveCriticalSection (thread->synch_cs);
2162 thread->state |= ThreadState_AbortRequested;
2163 if (thread->abort_state_handle)
2164 mono_gchandle_free (thread->abort_state_handle);
2166 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2167 g_assert (thread->abort_state_handle);
2169 thread->abort_state_handle = 0;
2171 thread->abort_exc = NULL;
2174 * abort_exc is set in mono_thread_execute_interruption(),
2175 * triggered by the call to signal_thread_state_change(),
2176 * below. There's a point between where we have
2177 * abort_state_handle set, but abort_exc NULL, but that's not
2181 LeaveCriticalSection (thread->synch_cs);
2183 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2185 /* During shutdown, we can't wait for other threads */
2187 /* Make sure the thread is awake */
2188 mono_thread_resume (thread);
2190 abort_thread_internal (thread, TRUE, TRUE);
2194 ves_icall_System_Threading_Thread_ResetAbort (void)
2196 MonoInternalThread *thread = mono_thread_internal_current ();
2197 gboolean was_aborting;
2199 ensure_synch_cs_set (thread);
2201 EnterCriticalSection (thread->synch_cs);
2202 was_aborting = thread->state & ThreadState_AbortRequested;
2203 thread->state &= ~ThreadState_AbortRequested;
2204 LeaveCriticalSection (thread->synch_cs);
2206 if (!was_aborting) {
2207 const char *msg = "Unable to reset abort because no abort was requested";
2208 mono_raise_exception (mono_get_exception_thread_state (msg));
2210 thread->abort_exc = NULL;
2211 if (thread->abort_state_handle) {
2212 mono_gchandle_free (thread->abort_state_handle);
2213 /* This is actually not necessary - the handle
2214 only counts if the exception is set */
2215 thread->abort_state_handle = 0;
2220 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2222 ensure_synch_cs_set (thread);
2224 EnterCriticalSection (thread->synch_cs);
2226 thread->state &= ~ThreadState_AbortRequested;
2228 if (thread->abort_exc) {
2229 thread->abort_exc = NULL;
2230 if (thread->abort_state_handle) {
2231 mono_gchandle_free (thread->abort_state_handle);
2232 /* This is actually not necessary - the handle
2233 only counts if the exception is set */
2234 thread->abort_state_handle = 0;
2238 LeaveCriticalSection (thread->synch_cs);
2242 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2244 MonoInternalThread *thread = this->internal_thread;
2245 MonoObject *state, *deserialized = NULL, *exc;
2248 if (!thread->abort_state_handle)
2251 state = mono_gchandle_get_target (thread->abort_state_handle);
2254 domain = mono_domain_get ();
2255 if (mono_object_domain (state) == domain)
2258 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2260 if (!deserialized) {
2261 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2263 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2264 mono_raise_exception (invalid_op_exc);
2267 return deserialized;
2271 mono_thread_suspend (MonoInternalThread *thread)
2273 ensure_synch_cs_set (thread);
2275 EnterCriticalSection (thread->synch_cs);
2277 if ((thread->state & ThreadState_Unstarted) != 0 ||
2278 (thread->state & ThreadState_Aborted) != 0 ||
2279 (thread->state & ThreadState_Stopped) != 0)
2281 LeaveCriticalSection (thread->synch_cs);
2285 if ((thread->state & ThreadState_Suspended) != 0 ||
2286 (thread->state & ThreadState_SuspendRequested) != 0 ||
2287 (thread->state & ThreadState_StopRequested) != 0)
2289 LeaveCriticalSection (thread->synch_cs);
2293 thread->state |= ThreadState_SuspendRequested;
2295 LeaveCriticalSection (thread->synch_cs);
2297 suspend_thread_internal (thread, FALSE);
2302 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2304 if (!mono_thread_suspend (thread))
2305 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2309 mono_thread_resume (MonoInternalThread *thread)
2311 ensure_synch_cs_set (thread);
2313 EnterCriticalSection (thread->synch_cs);
2315 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2316 thread->state &= ~ThreadState_SuspendRequested;
2317 LeaveCriticalSection (thread->synch_cs);
2321 if ((thread->state & ThreadState_Suspended) == 0 ||
2322 (thread->state & ThreadState_Unstarted) != 0 ||
2323 (thread->state & ThreadState_Aborted) != 0 ||
2324 (thread->state & ThreadState_Stopped) != 0)
2326 LeaveCriticalSection (thread->synch_cs);
2330 return resume_thread_internal (thread);
2334 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2336 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2337 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2341 mono_threads_is_critical_method (MonoMethod *method)
2343 switch (method->wrapper_type) {
2344 case MONO_WRAPPER_RUNTIME_INVOKE:
2345 case MONO_WRAPPER_XDOMAIN_INVOKE:
2346 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2353 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2358 if (mono_threads_is_critical_method (m)) {
2359 *((gboolean*)data) = TRUE;
2366 is_running_protected_wrapper (void)
2368 gboolean found = FALSE;
2369 mono_stack_walk (find_wrapper, &found);
2373 void mono_thread_internal_stop (MonoInternalThread *thread)
2375 ensure_synch_cs_set (thread);
2377 EnterCriticalSection (thread->synch_cs);
2379 if ((thread->state & ThreadState_StopRequested) != 0 ||
2380 (thread->state & ThreadState_Stopped) != 0)
2382 LeaveCriticalSection (thread->synch_cs);
2386 /* Make sure the thread is awake */
2387 mono_thread_resume (thread);
2389 thread->state |= ThreadState_StopRequested;
2390 thread->state &= ~ThreadState_AbortRequested;
2392 LeaveCriticalSection (thread->synch_cs);
2394 abort_thread_internal (thread, TRUE, TRUE);
2397 void mono_thread_stop (MonoThread *thread)
2399 mono_thread_internal_stop (thread->internal_thread);
2403 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2405 return *((volatile gint8 *) (ptr));
2409 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2411 return *((volatile gint16 *) (ptr));
2415 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2417 return *((volatile gint32 *) (ptr));
2421 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2423 return *((volatile gint64 *) (ptr));
2427 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2429 return (void *) *((volatile void **) ptr);
2433 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2435 return *((volatile double *) (ptr));
2439 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2441 return *((volatile float *) (ptr));
2445 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2447 *((volatile gint8 *) ptr) = value;
2451 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2453 *((volatile gint16 *) ptr) = value;
2457 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2459 *((volatile gint32 *) ptr) = value;
2463 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2465 *((volatile gint64 *) ptr) = value;
2469 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2471 *((volatile void **) ptr) = value;
2475 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2477 mono_gc_wbarrier_generic_store (ptr, value);
2481 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2483 *((volatile double *) ptr) = value;
2487 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2489 *((volatile float *) ptr) = value;
2492 void mono_thread_init (MonoThreadStartCB start_cb,
2493 MonoThreadAttachCB attach_cb)
2495 InitializeCriticalSection(&threads_mutex);
2496 InitializeCriticalSection(&interlocked_mutex);
2497 InitializeCriticalSection(&contexts_mutex);
2499 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2500 g_assert(background_change_event != NULL);
2502 mono_init_static_data_info (&thread_static_info);
2503 mono_init_static_data_info (&context_static_info);
2505 MONO_FAST_TLS_INIT (tls_current_object);
2506 mono_native_tls_alloc (¤t_object_key, NULL);
2507 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2509 mono_thread_start_cb = start_cb;
2510 mono_thread_attach_cb = attach_cb;
2512 /* Get a pseudo handle to the current process. This is just a
2513 * kludge so that wapi can build a process handle if needed.
2514 * As a pseudo handle is returned, we don't need to clean
2517 GetCurrentProcess ();
2520 void mono_thread_cleanup (void)
2522 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2523 /* The main thread must abandon any held mutexes (particularly
2524 * important for named mutexes as they are shared across
2525 * processes, see bug 74680.) This will happen when the
2526 * thread exits, but if it's not running in a subthread it
2527 * won't exit in time.
2529 /* Using non-w32 API is a nasty kludge, but I couldn't find
2530 * anything in the documentation that would let me do this
2531 * here yet still be safe to call on windows.
2533 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2537 /* This stuff needs more testing, it seems one of these
2538 * critical sections can be locked when mono_thread_cleanup is
2541 DeleteCriticalSection (&threads_mutex);
2542 DeleteCriticalSection (&interlocked_mutex);
2543 DeleteCriticalSection (&contexts_mutex);
2544 DeleteCriticalSection (&delayed_free_table_mutex);
2545 DeleteCriticalSection (&small_id_mutex);
2546 CloseHandle (background_change_event);
2549 mono_native_tls_free (current_object_key);
2553 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2555 mono_thread_cleanup_fn = func;
2559 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2561 thread->internal_thread->manage_callback = func;
2564 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2566 mono_thread_notify_pending_exc_fn = func;
2570 static void print_tids (gpointer key, gpointer value, gpointer user)
2572 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2573 * sizeof(uint) and a cast to uint would overflow
2575 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2576 * print this as a pointer.
2578 g_message ("Waiting for: %p", key);
2583 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2584 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2588 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2592 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2594 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2596 if(ret==WAIT_FAILED) {
2597 /* See the comment in build_wait_tids() */
2598 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2602 for(i=0; i<wait->num; i++)
2603 CloseHandle (wait->handles[i]);
2605 if (ret == WAIT_TIMEOUT)
2608 for(i=0; i<wait->num; i++) {
2609 gsize tid = wait->threads[i]->tid;
2611 mono_threads_lock ();
2612 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2613 /* This thread must have been killed, because
2614 * it hasn't cleaned itself up. (It's just
2615 * possible that the thread exited before the
2616 * parent thread had a chance to store the
2617 * handle, and now there is another pointer to
2618 * the already-exited thread stored. In this
2619 * case, we'll just get two
2620 * mono_profiler_thread_end() calls for the
2624 mono_threads_unlock ();
2625 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2626 thread_cleanup (wait->threads[i]);
2628 mono_threads_unlock ();
2633 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2635 guint32 i, ret, count;
2637 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2639 /* Add the thread state change event, so it wakes up if a thread changes
2640 * to background mode.
2643 if (count < MAXIMUM_WAIT_OBJECTS) {
2644 wait->handles [count] = background_change_event;
2648 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2650 if(ret==WAIT_FAILED) {
2651 /* See the comment in build_wait_tids() */
2652 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2656 for(i=0; i<wait->num; i++)
2657 CloseHandle (wait->handles[i]);
2659 if (ret == WAIT_TIMEOUT)
2662 if (ret < wait->num) {
2663 gsize tid = wait->threads[ret]->tid;
2664 mono_threads_lock ();
2665 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2666 /* See comment in wait_for_tids about thread cleanup */
2667 mono_threads_unlock ();
2668 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2669 thread_cleanup (wait->threads [ret]);
2671 mono_threads_unlock ();
2675 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2677 struct wait_data *wait=(struct wait_data *)user;
2679 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2681 MonoInternalThread *thread=(MonoInternalThread *)value;
2683 /* Ignore background threads, we abort them later */
2684 /* Do not lock here since it is not needed and the caller holds threads_lock */
2685 if (thread->state & ThreadState_Background) {
2686 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2687 return; /* just leave, ignore */
2690 if (mono_gc_is_finalizer_internal_thread (thread)) {
2691 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2695 if (thread == mono_thread_internal_current ()) {
2696 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2700 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2701 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2705 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2706 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2710 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2711 if (handle == NULL) {
2712 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2716 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2717 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2718 wait->handles[wait->num]=handle;
2719 wait->threads[wait->num]=thread;
2722 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2724 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2729 /* Just ignore the rest, we can't do anything with
2736 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2738 struct wait_data *wait=(struct wait_data *)user;
2739 gsize self = GetCurrentThreadId ();
2740 MonoInternalThread *thread = value;
2743 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2746 /* The finalizer thread is not a background thread */
2747 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2748 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2750 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2754 /* printf ("A: %d\n", wait->num); */
2755 wait->handles[wait->num]=thread->handle;
2756 wait->threads[wait->num]=thread;
2759 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2760 mono_thread_internal_stop (thread);
2764 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2768 * mono_threads_set_shutting_down:
2770 * Is called by a thread that wants to shut down Mono. If the runtime is already
2771 * shutting down, the calling thread is suspended/stopped, and this function never
2775 mono_threads_set_shutting_down (void)
2777 MonoInternalThread *current_thread = mono_thread_internal_current ();
2779 mono_threads_lock ();
2781 if (shutting_down) {
2782 mono_threads_unlock ();
2784 /* Make sure we're properly suspended/stopped */
2786 EnterCriticalSection (current_thread->synch_cs);
2788 if ((current_thread->state & ThreadState_SuspendRequested) ||
2789 (current_thread->state & ThreadState_AbortRequested) ||
2790 (current_thread->state & ThreadState_StopRequested)) {
2791 LeaveCriticalSection (current_thread->synch_cs);
2792 mono_thread_execute_interruption (current_thread);
2794 current_thread->state |= ThreadState_Stopped;
2795 LeaveCriticalSection (current_thread->synch_cs);
2798 /*since we're killing the thread, unset the current domain.*/
2799 mono_domain_unset ();
2801 /* Wake up other threads potentially waiting for us */
2804 shutting_down = TRUE;
2806 /* Not really a background state change, but this will
2807 * interrupt the main thread if it is waiting for all
2808 * the other threads.
2810 SetEvent (background_change_event);
2812 mono_threads_unlock ();
2817 * mono_threads_is_shutting_down:
2819 * Returns whether a thread has commenced shutdown of Mono. Note that
2820 * if the function returns FALSE the caller must not assume that
2821 * shutdown is not in progress, because the situation might have
2822 * changed since the function returned. For that reason this function
2823 * is of very limited utility.
2826 mono_threads_is_shutting_down (void)
2828 return shutting_down;
2831 void mono_thread_manage (void)
2833 struct wait_data wait_data;
2834 struct wait_data *wait = &wait_data;
2836 memset (wait, 0, sizeof (struct wait_data));
2837 /* join each thread that's still running */
2838 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2840 mono_threads_lock ();
2842 THREAD_DEBUG (g_message("%s: No threads", __func__));
2843 mono_threads_unlock ();
2846 mono_threads_unlock ();
2849 mono_threads_lock ();
2850 if (shutting_down) {
2851 /* somebody else is shutting down */
2852 mono_threads_unlock ();
2855 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2856 mono_g_hash_table_foreach (threads, print_tids, NULL));
2858 ResetEvent (background_change_event);
2860 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2861 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2862 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2863 mono_threads_unlock ();
2865 /* Something to wait for */
2866 wait_for_tids_or_state_change (wait, INFINITE);
2868 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2869 } while(wait->num>0);
2871 mono_threads_set_shutting_down ();
2873 /* No new threads will be created after this point */
2875 mono_runtime_set_shutting_down ();
2877 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2878 mono_thread_pool_cleanup ();
2881 * Remove everything but the finalizer thread and self.
2882 * Also abort all the background threads
2885 mono_threads_lock ();
2888 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2889 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2890 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2892 mono_threads_unlock ();
2894 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2896 /* Something to wait for */
2897 wait_for_tids (wait, INFINITE);
2899 } while (wait->num > 0);
2902 * give the subthreads a chance to really quit (this is mainly needed
2903 * to get correct user and system times from getrusage/wait/time(1)).
2904 * This could be removed if we avoid pthread_detach() and use pthread_join().
2911 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2913 MonoInternalThread *thread=(MonoInternalThread *)value;
2915 if(thread->tid != (gsize)user) {
2916 /*TerminateThread (thread->handle, -1);*/
2920 void mono_thread_abort_all_other_threads (void)
2922 gsize self = GetCurrentThreadId ();
2924 mono_threads_lock ();
2925 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2926 mono_g_hash_table_size (threads));
2927 mono_g_hash_table_foreach (threads, print_tids, NULL));
2929 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2931 mono_threads_unlock ();
2935 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2937 MonoInternalThread *thread = (MonoInternalThread*)value;
2938 struct wait_data *wait = (struct wait_data*)user_data;
2942 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2944 * This needs no locking.
2946 if ((thread->state & ThreadState_Suspended) != 0 ||
2947 (thread->state & ThreadState_Stopped) != 0)
2950 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2951 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2955 wait->handles [wait->num] = handle;
2956 wait->threads [wait->num] = thread;
2962 * mono_thread_suspend_all_other_threads:
2964 * Suspend all managed threads except the finalizer thread and this thread. It is
2965 * not possible to resume them later.
2967 void mono_thread_suspend_all_other_threads (void)
2969 struct wait_data wait_data;
2970 struct wait_data *wait = &wait_data;
2972 gsize self = GetCurrentThreadId ();
2974 guint32 eventidx = 0;
2975 gboolean starting, finished;
2977 memset (wait, 0, sizeof (struct wait_data));
2979 * The other threads could be in an arbitrary state at this point, i.e.
2980 * they could be starting up, shutting down etc. This means that there could be
2981 * threads which are not even in the threads hash table yet.
2985 * First we set a barrier which will be checked by all threads before they
2986 * are added to the threads hash table, and they will exit if the flag is set.
2987 * This ensures that no threads could be added to the hash later.
2988 * We will use shutting_down as the barrier for now.
2990 g_assert (shutting_down);
2993 * We make multiple calls to WaitForMultipleObjects since:
2994 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
2995 * - some threads could exit without becoming suspended
3000 * Make a copy of the hashtable since we can't do anything with
3001 * threads while threads_mutex is held.
3004 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3005 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3006 mono_threads_lock ();
3007 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3008 mono_threads_unlock ();
3010 events = g_new0 (gpointer, wait->num);
3012 /* Get the suspended events that we'll be waiting for */
3013 for (i = 0; i < wait->num; ++i) {
3014 MonoInternalThread *thread = wait->threads [i];
3015 gboolean signal_suspend = FALSE;
3017 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3018 //CloseHandle (wait->handles [i]);
3019 wait->threads [i] = NULL; /* ignore this thread in next loop */
3023 ensure_synch_cs_set (thread);
3025 EnterCriticalSection (thread->synch_cs);
3027 if (thread->suspended_event == NULL) {
3028 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3029 if (thread->suspended_event == NULL) {
3030 /* Forget this one and go on to the next */
3031 LeaveCriticalSection (thread->synch_cs);
3036 if ((thread->state & ThreadState_Suspended) != 0 ||
3037 (thread->state & ThreadState_StopRequested) != 0 ||
3038 (thread->state & ThreadState_Stopped) != 0) {
3039 LeaveCriticalSection (thread->synch_cs);
3040 CloseHandle (wait->handles [i]);
3041 wait->threads [i] = NULL; /* ignore this thread in next loop */
3045 if ((thread->state & ThreadState_SuspendRequested) == 0)
3046 signal_suspend = TRUE;
3048 events [eventidx++] = thread->suspended_event;
3050 /* Convert abort requests into suspend requests */
3051 if ((thread->state & ThreadState_AbortRequested) != 0)
3052 thread->state &= ~ThreadState_AbortRequested;
3054 thread->state |= ThreadState_SuspendRequested;
3056 LeaveCriticalSection (thread->synch_cs);
3058 /* Signal the thread to suspend */
3059 if (mono_thread_info_new_interrupt_enabled ())
3060 suspend_thread_internal (thread, TRUE);
3061 else if (signal_suspend)
3062 signal_thread_state_change (thread);
3065 /*Only wait on the suspend event if we are using the old path */
3066 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3067 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3068 for (i = 0; i < wait->num; ++i) {
3069 MonoInternalThread *thread = wait->threads [i];
3074 ensure_synch_cs_set (thread);
3076 EnterCriticalSection (thread->synch_cs);
3077 if ((thread->state & ThreadState_Suspended) != 0) {
3078 CloseHandle (thread->suspended_event);
3079 thread->suspended_event = NULL;
3081 LeaveCriticalSection (thread->synch_cs);
3085 if (eventidx <= 0) {
3087 * If there are threads which are starting up, we wait until they
3088 * are suspended when they try to register in the threads hash.
3089 * This is guaranteed to finish, since the threads which can create new
3090 * threads get suspended after a while.
3091 * FIXME: The finalizer thread can still create new threads.
3093 mono_threads_lock ();
3094 if (threads_starting_up)
3095 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3098 mono_threads_unlock ();
3110 collect_threads (gpointer key, gpointer value, gpointer user_data)
3112 MonoInternalThread *thread = (MonoInternalThread*)value;
3113 struct wait_data *wait = (struct wait_data*)user_data;
3116 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3117 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3121 wait->handles [wait->num] = handle;
3122 wait->threads [wait->num] = thread;
3127 static gboolean thread_dump_requested;
3129 static G_GNUC_UNUSED gboolean
3130 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3132 GString *p = (GString*)data;
3133 MonoMethod *method = NULL;
3135 method = frame->ji->method;
3138 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3139 g_string_append_printf (p, " %s\n", location);
3142 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3148 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3150 GString* text = g_string_new (0);
3152 GError *error = NULL;
3155 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3157 g_string_append_printf (text, "\n\"%s\"", name);
3160 else if (thread->threadpool_thread)
3161 g_string_append (text, "\n\"<threadpool thread>\"");
3163 g_string_append (text, "\n\"<unnamed thread>\"");
3166 /* This no longer works with remote unwinding */
3168 wapi_desc = wapi_current_thread_desc ();
3169 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3174 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3175 mono_thread_info_resume (mono_thread_info_get_tid (info));
3177 fprintf (stdout, "%s", text->str);
3179 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3180 OutputDebugStringA(text->str);
3183 g_string_free (text, TRUE);
3188 dump_thread (gpointer key, gpointer value, gpointer user)
3190 MonoInternalThread *thread = (MonoInternalThread *)value;
3191 MonoThreadInfo *info;
3193 if (thread == mono_thread_internal_current ())
3197 FIXME This still can hang if we stop a thread during malloc.
3198 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3199 that takes a callback and runs it with the target suspended.
3200 We probably should loop a bit around trying to get it to either managed code
3203 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3208 print_thread_dump (thread, info);
3212 mono_threads_perform_thread_dump (void)
3214 if (!thread_dump_requested)
3217 printf ("Full thread dump:\n");
3220 * Make a copy of the hashtable since we can't do anything with
3221 * threads while threads_mutex is held.
3223 mono_threads_lock ();
3224 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3225 mono_threads_unlock ();
3227 thread_dump_requested = FALSE;
3231 * mono_threads_request_thread_dump:
3233 * Ask all threads except the current to print their stacktrace to stdout.
3236 mono_threads_request_thread_dump (void)
3238 struct wait_data wait_data;
3239 struct wait_data *wait = &wait_data;
3242 /*The new thread dump code runs out of the finalizer thread. */
3243 if (mono_thread_info_new_interrupt_enabled ()) {
3244 thread_dump_requested = TRUE;
3245 mono_gc_finalize_notify ();
3250 memset (wait, 0, sizeof (struct wait_data));
3253 * Make a copy of the hashtable since we can't do anything with
3254 * threads while threads_mutex is held.
3256 mono_threads_lock ();
3257 mono_g_hash_table_foreach (threads, collect_threads, wait);
3258 mono_threads_unlock ();
3260 for (i = 0; i < wait->num; ++i) {
3261 MonoInternalThread *thread = wait->threads [i];
3263 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3264 (thread != mono_thread_internal_current ()) &&
3265 !thread->thread_dump_requested) {
3266 thread->thread_dump_requested = TRUE;
3268 signal_thread_state_change (thread);
3271 CloseHandle (wait->handles [i]);
3277 gint allocated; /* +1 so that refs [allocated] == NULL */
3281 typedef struct ref_stack RefStack;
3284 ref_stack_new (gint initial_size)
3288 initial_size = MAX (initial_size, 16) + 1;
3289 rs = g_new0 (RefStack, 1);
3290 rs->refs = g_new0 (gpointer, initial_size);
3291 rs->allocated = initial_size;
3296 ref_stack_destroy (gpointer ptr)
3307 ref_stack_push (RefStack *rs, gpointer ptr)
3309 g_assert (rs != NULL);
3311 if (rs->bottom >= rs->allocated) {
3312 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3313 rs->allocated <<= 1;
3314 rs->refs [rs->allocated] = NULL;
3316 rs->refs [rs->bottom++] = ptr;
3320 ref_stack_pop (RefStack *rs)
3322 if (rs == NULL || rs->bottom == 0)
3326 rs->refs [rs->bottom] = NULL;
3330 ref_stack_find (RefStack *rs, gpointer ptr)
3337 for (refs = rs->refs; refs && *refs; refs++) {
3345 * mono_thread_push_appdomain_ref:
3347 * Register that the current thread may have references to objects in domain
3348 * @domain on its stack. Each call to this function should be paired with a
3349 * call to pop_appdomain_ref.
3352 mono_thread_push_appdomain_ref (MonoDomain *domain)
3354 MonoInternalThread *thread = mono_thread_internal_current ();
3357 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3358 SPIN_LOCK (thread->lock_thread_id);
3359 if (thread->appdomain_refs == NULL)
3360 thread->appdomain_refs = ref_stack_new (16);
3361 ref_stack_push (thread->appdomain_refs, domain);
3362 SPIN_UNLOCK (thread->lock_thread_id);
3367 mono_thread_pop_appdomain_ref (void)
3369 MonoInternalThread *thread = mono_thread_internal_current ();
3372 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3373 SPIN_LOCK (thread->lock_thread_id);
3374 ref_stack_pop (thread->appdomain_refs);
3375 SPIN_UNLOCK (thread->lock_thread_id);
3380 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3383 SPIN_LOCK (thread->lock_thread_id);
3384 res = ref_stack_find (thread->appdomain_refs, domain);
3385 SPIN_UNLOCK (thread->lock_thread_id);
3390 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3392 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3395 typedef struct abort_appdomain_data {
3396 struct wait_data wait;
3398 } abort_appdomain_data;
3401 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3403 MonoInternalThread *thread = (MonoInternalThread*)value;
3404 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3405 MonoDomain *domain = data->domain;
3407 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3408 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3410 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3411 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3414 data->wait.handles [data->wait.num] = handle;
3415 data->wait.threads [data->wait.num] = thread;
3418 /* Just ignore the rest, we can't do anything with
3426 * mono_threads_abort_appdomain_threads:
3428 * Abort threads which has references to the given appdomain.
3431 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3433 abort_appdomain_data user_data;
3435 int orig_timeout = timeout;
3438 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3440 start_time = mono_msec_ticks ();
3442 mono_threads_lock ();
3444 user_data.domain = domain;
3445 user_data.wait.num = 0;
3446 /* This shouldn't take any locks */
3447 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3448 mono_threads_unlock ();
3450 if (user_data.wait.num > 0) {
3451 /* Abort the threads outside the threads lock */
3452 for (i = 0; i < user_data.wait.num; ++i)
3453 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3456 * We should wait for the threads either to abort, or to leave the
3457 * domain. We can't do the latter, so we wait with a timeout.
3459 wait_for_tids (&user_data.wait, 100);
3462 /* Update remaining time */
3463 timeout -= mono_msec_ticks () - start_time;
3464 start_time = mono_msec_ticks ();
3466 if (orig_timeout != -1 && timeout < 0)
3469 while (user_data.wait.num > 0);
3471 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3477 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3479 MonoInternalThread *thread = (MonoInternalThread*)value;
3480 MonoDomain *domain = (MonoDomain*)user_data;
3483 /* No locking needed here */
3484 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3486 if (thread->cached_culture_info) {
3487 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3488 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3489 if (obj && obj->vtable->domain == domain)
3490 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3496 * mono_threads_clear_cached_culture:
3498 * Clear the cached_current_culture from all threads if it is in the
3502 mono_threads_clear_cached_culture (MonoDomain *domain)
3504 mono_threads_lock ();
3505 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3506 mono_threads_unlock ();
3510 * mono_thread_get_undeniable_exception:
3512 * Return an exception which needs to be raised when leaving a catch clause.
3513 * This is used for undeniable exception propagation.
3516 mono_thread_get_undeniable_exception (void)
3518 MonoInternalThread *thread = mono_thread_internal_current ();
3520 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3522 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3523 * exception if the thread no longer references a dying appdomain.
3525 thread->abort_exc->trace_ips = NULL;
3526 thread->abort_exc->stack_trace = NULL;
3527 return thread->abort_exc;
3533 #if MONO_SMALL_CONFIG
3534 #define NUM_STATIC_DATA_IDX 4
3535 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3539 #define NUM_STATIC_DATA_IDX 8
3540 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3541 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3545 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3548 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3551 gpointer *static_data = addr;
3552 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3555 if (!static_data [i])
3557 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3558 ptr = static_data [i];
3559 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3560 uintptr_t bmap = static_reference_bitmaps [i][j];
3563 if ((bmap & 1) && *p) {
3574 * mono_alloc_static_data
3576 * Allocate memory blocks for storing threads or context static data
3579 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3581 guint idx = (offset >> 24) - 1;
3584 gpointer* static_data = *static_data_ptr;
3586 static void* tls_desc = NULL;
3587 if (mono_gc_user_markers_supported () && !tls_desc)
3588 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3589 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3590 *static_data_ptr = static_data;
3591 static_data [0] = static_data;
3594 for (i = 1; i <= idx; ++i) {
3595 if (static_data [i])
3597 if (mono_gc_user_markers_supported () && threadlocal)
3598 static_data [i] = g_malloc0 (static_data_size [i]);
3600 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3605 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3608 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3609 if (!static_data [i])
3611 if (mono_gc_user_markers_supported () && threadlocal)
3612 g_free (static_data [i]);
3614 mono_gc_free_fixed (static_data [i]);
3616 mono_gc_free_fixed (static_data);
3620 * mono_init_static_data_info
3622 * Initializes static data counters
3624 static void mono_init_static_data_info (StaticDataInfo *static_data)
3626 static_data->idx = 0;
3627 static_data->offset = 0;
3628 static_data->freelist = NULL;
3632 * mono_alloc_static_data_slot
3634 * Generates an offset for static data. static_data contains the counters
3635 * used to generate it.
3638 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3642 if (!static_data->idx && !static_data->offset) {
3644 * we use the first chunk of the first allocation also as
3645 * an array for the rest of the data
3647 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3649 static_data->offset += align - 1;
3650 static_data->offset &= ~(align - 1);
3651 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3652 static_data->idx ++;
3653 g_assert (size <= static_data_size [static_data->idx]);
3654 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3655 static_data->offset = 0;
3657 offset = static_data->offset | ((static_data->idx + 1) << 24);
3658 static_data->offset += size;
3663 * ensure thread static fields already allocated are valid for thread
3664 * This function is called when a thread is created or on thread attach.
3667 thread_adjust_static_data (MonoInternalThread *thread)
3671 mono_threads_lock ();
3672 if (thread_static_info.offset || thread_static_info.idx > 0) {
3673 /* get the current allocated size */
3674 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3675 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3677 mono_threads_unlock ();
3681 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3683 MonoInternalThread *thread = value;
3684 guint32 offset = GPOINTER_TO_UINT (user);
3686 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3689 static MonoThreadDomainTls*
3690 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3692 MonoThreadDomainTls* prev = NULL;
3693 MonoThreadDomainTls* tmp = static_data->freelist;
3695 if (tmp->size == size) {
3697 prev->next = tmp->next;
3699 static_data->freelist = tmp->next;
3708 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3711 int idx = (offset >> 24) - 1;
3713 if (!static_reference_bitmaps [idx])
3714 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3715 rb = static_reference_bitmaps [idx];
3717 offset /= sizeof (gpointer);
3718 /* offset is now the bitmap offset */
3719 for (i = 0; i < numbits; ++i) {
3720 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3721 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3726 clear_reference_bitmap (guint32 offset, guint32 size)
3728 int idx = (offset >> 24) - 1;
3730 rb = static_reference_bitmaps [idx];
3732 offset /= sizeof (gpointer);
3733 size /= sizeof (gpointer);
3735 /* offset is now the bitmap offset */
3736 for (; offset < size; ++offset)
3737 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3741 * The offset for a special static variable is composed of three parts:
3742 * a bit that indicates the type of static data (0:thread, 1:context),
3743 * an index in the array of chunks of memory for the thread (thread->static_data)
3744 * and an offset in that chunk of mem. This allows allocating less memory in the
3749 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3752 if (static_type == SPECIAL_STATIC_THREAD) {
3753 MonoThreadDomainTls *item;
3754 mono_threads_lock ();
3755 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3756 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3758 offset = item->offset;
3761 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3763 update_tls_reference_bitmap (offset, bitmap, numbits);
3764 /* This can be called during startup */
3765 if (threads != NULL)
3766 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3767 mono_threads_unlock ();
3769 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3770 mono_contexts_lock ();
3771 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3772 mono_contexts_unlock ();
3773 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3779 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3781 /* The high bit means either thread (0) or static (1) data. */
3783 guint32 static_type = (offset & 0x80000000);
3786 offset &= 0x7fffffff;
3787 idx = (offset >> 24) - 1;
3789 if (static_type == 0) {
3790 return get_thread_static_data (thread, offset);
3792 /* Allocate static data block under demand, since we don't have a list
3795 MonoAppContext *context = mono_context_get ();
3796 if (!context->static_data || !context->static_data [idx]) {
3797 mono_contexts_lock ();
3798 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3799 mono_contexts_unlock ();
3801 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3806 mono_get_special_static_data (guint32 offset)
3808 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3817 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3819 MonoInternalThread *thread = value;
3820 TlsOffsetSize *data = user;
3821 int idx = (data->offset >> 24) - 1;
3824 if (!thread->static_data || !thread->static_data [idx])
3826 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3827 mono_gc_bzero (ptr, data->size);
3831 do_free_special_slot (guint32 offset, guint32 size)
3833 guint32 static_type = (offset & 0x80000000);
3834 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3835 if (static_type == 0) {
3837 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3838 data.offset = offset & 0x7fffffff;
3840 clear_reference_bitmap (data.offset, data.size);
3841 if (threads != NULL)
3842 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3843 item->offset = offset;
3846 if (!mono_runtime_is_shutting_down ()) {
3847 item->next = thread_static_info.freelist;
3848 thread_static_info.freelist = item;
3850 /* We could be called during shutdown after mono_thread_cleanup () is called */
3854 /* FIXME: free context static data as well */
3859 do_free_special (gpointer key, gpointer value, gpointer data)
3861 MonoClassField *field = key;
3862 guint32 offset = GPOINTER_TO_UINT (value);
3865 size = mono_type_size (field->type, &align);
3866 do_free_special_slot (offset, size);
3870 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3872 mono_threads_lock ();
3873 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3874 mono_threads_unlock ();
3878 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3880 mono_threads_lock ();
3881 do_free_special_slot (offset, size);
3882 mono_threads_unlock ();
3886 * allocates room in the thread local area for storing an instance of the struct type
3887 * the allocation is kept track of in domain->tlsrec_list.
3890 mono_thread_alloc_tls (MonoReflectionType *type)
3892 MonoDomain *domain = mono_domain_get ();
3894 MonoTlsDataRecord *tlsrec;
3897 gsize default_bitmap [4] = {0};
3898 uint32_t tls_offset;
3902 klass = mono_class_from_mono_type (type->type);
3903 /* TlsDatum is a struct, so we subtract the object header size offset */
3904 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3905 size = mono_type_size (type->type, &align);
3906 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3907 if (bitmap != default_bitmap)
3909 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3910 tlsrec->tls_offset = tls_offset;
3911 tlsrec->size = size;
3912 mono_domain_lock (domain);
3913 tlsrec->next = domain->tlsrec_list;
3914 domain->tlsrec_list = tlsrec;
3915 mono_domain_unlock (domain);
3920 mono_thread_destroy_tls (uint32_t tls_offset)
3922 MonoTlsDataRecord *prev = NULL;
3923 MonoTlsDataRecord *cur;
3925 MonoDomain *domain = mono_domain_get ();
3926 mono_domain_lock (domain);
3927 cur = domain->tlsrec_list;
3929 if (cur->tls_offset == tls_offset) {
3931 prev->next = cur->next;
3933 domain->tlsrec_list = cur->next;
3941 mono_domain_unlock (domain);
3943 mono_special_static_data_free_slot (tls_offset, size);
3947 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3950 mono_thread_destroy_domain_tls (MonoDomain *domain)
3952 while (domain->tlsrec_list)
3953 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3956 static MonoClassField *local_slots = NULL;
3959 /* local tls data to get locals_slot from a thread */
3962 /* index in the locals_slot array */
3967 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3969 LocalSlotID *sid = user_data;
3970 MonoInternalThread *thread = (MonoInternalThread*)value;
3971 MonoArray *slots_array;
3973 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3974 * it is for the right domain, so we need to check if it is allocated an initialized
3975 * for the current thread.
3977 /*g_print ("handling thread %p\n", thread);*/
3978 if (!thread->static_data || !thread->static_data [sid->idx])
3980 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3981 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3983 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3987 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3995 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3997 g_warning ("local_slots field not found in Thread class");
4001 domain = mono_domain_get ();
4002 mono_domain_lock (domain);
4003 if (domain->special_static_fields)
4004 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4005 mono_domain_unlock (domain);
4008 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4009 sid.offset = GPOINTER_TO_UINT (addr);
4010 sid.offset &= 0x7fffffff;
4011 sid.idx = (sid.offset >> 24) - 1;
4012 mono_threads_lock ();
4013 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4014 mono_threads_unlock ();
4016 /* FIXME: clear the slot for MonoAppContexts, too */
4021 static void CALLBACK dummy_apc (ULONG_PTR param)
4025 static guint32 dummy_apc (gpointer param)
4032 * mono_thread_execute_interruption
4034 * Performs the operation that the requested thread state requires (abort,
4037 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4039 ensure_synch_cs_set (thread);
4041 EnterCriticalSection (thread->synch_cs);
4043 /* MonoThread::interruption_requested can only be changed with atomics */
4044 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4045 /* this will consume pending APC calls */
4046 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4047 InterlockedDecrement (&thread_interruption_requested);
4049 /* Clear the interrupted flag of the thread so it can wait again */
4050 wapi_clear_interruption ();
4054 if ((thread->state & ThreadState_AbortRequested) != 0) {
4055 LeaveCriticalSection (thread->synch_cs);
4056 if (thread->abort_exc == NULL) {
4058 * This might be racy, but it has to be called outside the lock
4059 * since it calls managed code.
4061 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4063 return thread->abort_exc;
4065 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4066 self_suspend_internal (thread);
4069 else if ((thread->state & ThreadState_StopRequested) != 0) {
4070 /* FIXME: do this through the JIT? */
4072 LeaveCriticalSection (thread->synch_cs);
4074 mono_thread_exit ();
4076 } else if (thread->pending_exception) {
4079 exc = thread->pending_exception;
4080 thread->pending_exception = NULL;
4082 LeaveCriticalSection (thread->synch_cs);
4084 } else if (thread->thread_interrupt_requested) {
4086 thread->thread_interrupt_requested = FALSE;
4087 LeaveCriticalSection (thread->synch_cs);
4089 return(mono_get_exception_thread_interrupted ());
4092 LeaveCriticalSection (thread->synch_cs);
4098 * mono_thread_request_interruption
4100 * A signal handler can call this method to request the interruption of a
4101 * thread. The result of the interruption will depend on the current state of
4102 * the thread. If the result is an exception that needs to be throw, it is
4103 * provided as return value.
4106 mono_thread_request_interruption (gboolean running_managed)
4108 MonoInternalThread *thread = mono_thread_internal_current ();
4110 /* The thread may already be stopping */
4115 if (thread->interrupt_on_stop &&
4116 thread->state & ThreadState_StopRequested &&
4117 thread->state & ThreadState_Background)
4121 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4123 InterlockedIncrement (&thread_interruption_requested);
4125 if (!running_managed || is_running_protected_wrapper ()) {
4126 /* Can't stop while in unmanaged code. Increase the global interruption
4127 request count. When exiting the unmanaged method the count will be
4128 checked and the thread will be interrupted. */
4131 if (mono_thread_notify_pending_exc_fn && !running_managed)
4132 /* The JIT will notify the thread about the interruption */
4133 /* This shouldn't take any locks */
4134 mono_thread_notify_pending_exc_fn ();
4136 /* this will awake the thread if it is in WaitForSingleObject
4138 /* Our implementation of this function ignores the func argument */
4139 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4143 return mono_thread_execute_interruption (thread);
4147 /*This function should be called by a thread after it has exited all of
4148 * its handle blocks at interruption time.*/
4150 mono_thread_resume_interruption (void)
4152 MonoInternalThread *thread = mono_thread_internal_current ();
4153 gboolean still_aborting;
4155 /* The thread may already be stopping */
4159 ensure_synch_cs_set (thread);
4160 EnterCriticalSection (thread->synch_cs);
4161 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4162 LeaveCriticalSection (thread->synch_cs);
4164 /*This can happen if the protected block called Thread::ResetAbort*/
4165 if (!still_aborting)
4168 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4170 InterlockedIncrement (&thread_interruption_requested);
4173 wapi_self_interrupt ();
4175 return mono_thread_execute_interruption (thread);
4178 gboolean mono_thread_interruption_requested ()
4180 if (thread_interruption_requested) {
4181 MonoInternalThread *thread = mono_thread_internal_current ();
4182 /* The thread may already be stopping */
4184 return (thread->interruption_requested);
4189 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4191 MonoInternalThread *thread = mono_thread_internal_current ();
4193 /* The thread may already be stopping */
4197 mono_debugger_check_interruption ();
4199 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4200 MonoException* exc = mono_thread_execute_interruption (thread);
4201 if (exc) mono_raise_exception (exc);
4206 * Performs the interruption of the current thread, if one has been requested,
4207 * and the thread is not running a protected wrapper.
4209 void mono_thread_interruption_checkpoint ()
4211 mono_thread_interruption_checkpoint_request (FALSE);
4215 * Performs the interruption of the current thread, if one has been requested.
4217 void mono_thread_force_interruption_checkpoint ()
4219 mono_thread_interruption_checkpoint_request (TRUE);
4223 * mono_thread_get_and_clear_pending_exception:
4225 * Return any pending exceptions for the current thread and clear it as a side effect.
4228 mono_thread_get_and_clear_pending_exception (void)
4230 MonoInternalThread *thread = mono_thread_internal_current ();
4232 /* The thread may already be stopping */
4236 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4237 return mono_thread_execute_interruption (thread);
4240 if (thread->pending_exception) {
4241 MonoException *exc = thread->pending_exception;
4243 thread->pending_exception = NULL;
4251 * mono_set_pending_exception:
4253 * Set the pending exception of the current thread to EXC.
4254 * The exception will be thrown when execution returns to managed code.
4257 mono_set_pending_exception (MonoException *exc)
4259 MonoInternalThread *thread = mono_thread_internal_current ();
4261 /* The thread may already be stopping */
4265 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4267 mono_thread_request_interruption (FALSE);
4271 * mono_thread_interruption_request_flag:
4273 * Returns the address of a flag that will be non-zero if an interruption has
4274 * been requested for a thread. The thread to interrupt may not be the current
4275 * thread, so an additional call to mono_thread_interruption_requested() or
4276 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4279 gint32* mono_thread_interruption_request_flag ()
4281 return &thread_interruption_requested;
4285 mono_thread_init_apartment_state (void)
4288 MonoInternalThread* thread = mono_thread_internal_current ();
4290 /* Positive return value indicates success, either
4291 * S_OK if this is first CoInitialize call, or
4292 * S_FALSE if CoInitialize already called, but with same
4293 * threading model. A negative value indicates failure,
4294 * probably due to trying to change the threading model.
4296 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4297 ? COINIT_APARTMENTTHREADED
4298 : COINIT_MULTITHREADED) < 0) {
4299 thread->apartment_state = ThreadApartmentState_Unknown;
4305 mono_thread_cleanup_apartment_state (void)
4308 MonoInternalThread* thread = mono_thread_internal_current ();
4310 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4317 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4319 ensure_synch_cs_set (thread);
4321 EnterCriticalSection (thread->synch_cs);
4322 thread->state |= state;
4323 LeaveCriticalSection (thread->synch_cs);
4327 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4329 ensure_synch_cs_set (thread);
4331 EnterCriticalSection (thread->synch_cs);
4332 thread->state &= ~state;
4333 LeaveCriticalSection (thread->synch_cs);
4337 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4339 gboolean ret = FALSE;
4341 ensure_synch_cs_set (thread);
4343 EnterCriticalSection (thread->synch_cs);
4345 if ((thread->state & test) != 0) {
4349 LeaveCriticalSection (thread->synch_cs);
4354 //static MonoClassField *execution_context_field;
4357 get_execution_context_addr (void)
4359 MonoDomain *domain = mono_domain_get ();
4360 guint32 offset = domain->execution_context_field_offset;
4363 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4366 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4368 mono_domain_lock (domain);
4369 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4370 mono_domain_unlock (domain);
4373 domain->execution_context_field_offset = offset;
4376 return (MonoObject**) mono_get_special_static_data (offset);
4380 mono_thread_get_execution_context (void)
4382 return *get_execution_context_addr ();
4386 mono_thread_set_execution_context (MonoObject *ec)
4388 *get_execution_context_addr () = ec;
4391 static gboolean has_tls_get = FALSE;
4394 mono_runtime_set_has_tls_get (gboolean val)
4400 mono_runtime_has_tls_get (void)
4406 mono_thread_kill (MonoInternalThread *thread, int signal)
4409 /* Win32 uses QueueUserAPC and callers of this are guarded */
4410 g_assert_not_reached ();
4412 # ifdef PTHREAD_POINTER_ID
4413 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4415 # ifdef PLATFORM_ANDROID
4416 if (thread->android_tid != 0) {
4418 int old_errno = errno;
4420 ret = tkill ((pid_t) thread->android_tid, signal);
4429 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4431 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4438 self_interrupt_thread (void *_unused)
4440 MonoThreadInfo *info = mono_thread_info_current ();
4441 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4442 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4443 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4444 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4448 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4452 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4456 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4458 MonoJitInfo **dest = data;
4464 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4466 MonoJitInfo *ji = NULL;
4467 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4472 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4475 MonoThreadInfo *info = NULL;
4476 gboolean protected_wrapper;
4477 gboolean running_managed;
4479 if (!mono_thread_info_new_interrupt_enabled ()) {
4480 signal_thread_state_change (thread);
4485 FIXME this is insanely broken, it doesn't cause interruption to happen
4486 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4488 if (thread == mono_thread_internal_current ()) {
4489 /* Do it synchronously */
4490 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4492 mono_raise_exception (exc);
4494 wapi_interrupt_thread (thread->handle);
4499 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4500 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4504 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4505 mono_thread_info_resume (mono_thread_info_get_tid (info));
4509 /*someone is already interrupting it*/
4510 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4511 mono_thread_info_resume (mono_thread_info_get_tid (info));
4514 InterlockedIncrement (&thread_interruption_requested);
4516 ji = mono_thread_info_get_last_managed (info);
4517 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4518 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4520 if (!protected_wrapper && running_managed) {
4521 /*We are in managed code*/
4522 /*Set the thread to call */
4523 if (install_async_abort)
4524 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4525 mono_thread_info_resume (mono_thread_info_get_tid (info));
4527 gpointer interrupt_handle;
4529 * This will cause waits to be broken.
4530 * It will also prevent the thread from entering a wait, so if the thread returns
4531 * from the wait before it receives the abort signal, it will just spin in the wait
4532 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4536 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4538 mono_thread_info_resume (mono_thread_info_get_tid (info));
4540 wapi_finish_interrupt_thread (interrupt_handle);
4543 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4547 transition_to_suspended (MonoInternalThread *thread)
4549 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4550 g_assert (0); /*FIXME we should not reach this */
4551 /*Make sure we balance the suspend count.*/
4552 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4554 thread->state &= ~ThreadState_SuspendRequested;
4555 thread->state |= ThreadState_Suspended;
4557 LeaveCriticalSection (thread->synch_cs);
4561 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4563 if (!mono_thread_info_new_interrupt_enabled ()) {
4564 signal_thread_state_change (thread);
4568 EnterCriticalSection (thread->synch_cs);
4569 if (thread == mono_thread_internal_current ()) {
4570 transition_to_suspended (thread);
4571 mono_thread_info_self_suspend ();
4573 MonoThreadInfo *info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt);
4574 MonoJitInfo *ji = mono_thread_info_get_last_managed (info);
4575 gboolean protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4576 gboolean running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4578 if (running_managed && !protected_wrapper) {
4579 transition_to_suspended (thread);
4581 gpointer interrupt_handle;
4583 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4584 InterlockedIncrement (&thread_interruption_requested);
4587 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4589 mono_thread_info_resume (mono_thread_info_get_tid (info));
4592 wapi_finish_interrupt_thread (interrupt_handle);
4594 LeaveCriticalSection (thread->synch_cs);
4599 /*This is called with @thread synch_cs held and it must release it*/
4601 self_suspend_internal (MonoInternalThread *thread)
4603 if (!mono_thread_info_new_interrupt_enabled ()) {
4604 thread->state &= ~ThreadState_SuspendRequested;
4605 thread->state |= ThreadState_Suspended;
4606 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4607 if (thread->suspend_event == NULL) {
4608 LeaveCriticalSection (thread->synch_cs);
4611 if (thread->suspended_event)
4612 SetEvent (thread->suspended_event);
4614 LeaveCriticalSection (thread->synch_cs);
4616 if (shutting_down) {
4617 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4622 WaitForSingleObject (thread->suspend_event, INFINITE);
4624 EnterCriticalSection (thread->synch_cs);
4626 CloseHandle (thread->suspend_event);
4627 thread->suspend_event = NULL;
4628 thread->state &= ~ThreadState_Suspended;
4630 /* The thread that requested the resume will have replaced this event
4631 * and will be waiting for it
4633 SetEvent (thread->resume_event);
4635 LeaveCriticalSection (thread->synch_cs);
4639 transition_to_suspended (thread);
4640 mono_thread_info_self_suspend ();
4643 /*This is called with @thread synch_cs held and it must release it*/
4645 resume_thread_internal (MonoInternalThread *thread)
4647 if (!mono_thread_info_new_interrupt_enabled ()) {
4648 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4649 if (thread->resume_event == NULL) {
4650 LeaveCriticalSection (thread->synch_cs);
4654 /* Awake the thread */
4655 SetEvent (thread->suspend_event);
4657 LeaveCriticalSection (thread->synch_cs);
4659 /* Wait for the thread to awake */
4660 WaitForSingleObject (thread->resume_event, INFINITE);
4661 CloseHandle (thread->resume_event);
4662 thread->resume_event = NULL;
4666 LeaveCriticalSection (thread->synch_cs);
4667 /* Awake the thread */
4668 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4670 EnterCriticalSection (thread->synch_cs);
4671 thread->state &= ~ThreadState_Suspended;
4672 LeaveCriticalSection (thread->synch_cs);