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);
770 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
772 mono_thread_create_internal (domain, func, arg, FALSE, 0);
776 * mono_thread_get_stack_bounds:
778 * Return the address and size of the current threads stack. Return NULL as the
779 * stack address if the stack address cannot be determined.
782 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
784 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
785 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
786 *stsize = pthread_get_stacksize_np (pthread_self ());
788 /* staddr points to the start of the stack, not the end */
790 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
792 /* FIXME: simplify the mess below */
793 #elif !defined(HOST_WIN32)
795 guint8 *current = (guint8*)&attr;
797 pthread_attr_init (&attr);
798 # ifdef HAVE_PTHREAD_GETATTR_NP
799 pthread_getattr_np (pthread_self(), &attr);
801 # ifdef HAVE_PTHREAD_ATTR_GET_NP
802 pthread_attr_get_np (pthread_self(), &attr);
805 pthread_attr_getstacksize (&attr, &stsize);
806 # elif defined(__OpenBSD__)
810 rslt = pthread_stackseg_np(pthread_self(), &ss);
811 g_assert (rslt == 0);
813 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
814 *stsize = ss.ss_size;
823 # if !defined(__OpenBSD__)
824 pthread_attr_getstack (&attr, (void**)staddr, stsize);
827 g_assert ((current > *staddr) && (current < *staddr + *stsize));
830 pthread_attr_destroy (&attr);
833 *stsize = (size_t)-1;
836 /* When running under emacs, sometimes staddr is not aligned to a page size */
837 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
841 mono_thread_attach (MonoDomain *domain)
843 MonoInternalThread *thread;
844 MonoThread *current_thread;
845 HANDLE thread_handle;
848 if ((thread = mono_thread_internal_current ())) {
849 if (domain != mono_domain_get ())
850 mono_domain_set (domain, TRUE);
851 /* Already attached */
852 return mono_thread_current ();
855 if (!mono_gc_register_thread (&domain)) {
856 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 ());
859 thread = create_internal_thread_object ();
861 thread_handle = GetCurrentThread ();
862 g_assert (thread_handle);
864 tid=GetCurrentThreadId ();
867 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
868 * refer to the thread from other threads for things like aborting.
870 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
871 THREAD_ALL_ACCESS, TRUE, 0);
873 thread->handle=thread_handle;
875 #ifdef PLATFORM_ANDROID
876 thread->android_tid = (gpointer) gettid ();
878 thread->apartment_state=ThreadApartmentState_Unknown;
879 thread->thread_pinning_ref = thread;
880 thread->managed_id = get_next_managed_thread_id ();
881 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
883 thread->stack_ptr = &tid;
885 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
886 InitializeCriticalSection (thread->synch_cs);
888 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
890 current_thread = new_thread_with_internal (domain, thread);
892 if (!handle_store (current_thread)) {
893 /* Mono is shutting down, so just wait for the end */
898 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
900 SET_CURRENT_OBJECT (thread);
901 mono_domain_set (domain, TRUE);
903 mono_monitor_init_tls ();
905 thread_adjust_static_data (thread);
907 init_root_domain_thread (thread, current_thread);
908 if (domain != mono_get_root_domain ())
909 set_current_thread_for_domain (domain, thread, current_thread);
912 if (mono_thread_attach_cb) {
916 mono_thread_get_stack_bounds (&staddr, &stsize);
919 mono_thread_attach_cb (tid, &tid);
921 mono_thread_attach_cb (tid, staddr + stsize);
924 // FIXME: Need a separate callback
925 mono_profiler_thread_start (tid);
927 return current_thread;
931 mono_thread_detach (MonoThread *thread)
933 g_return_if_fail (thread != NULL);
935 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
937 mono_profiler_thread_end (thread->internal_thread->tid);
939 thread_cleanup (thread->internal_thread);
941 SET_CURRENT_OBJECT (NULL);
942 mono_domain_unset ();
944 /* Don't need to CloseHandle this thread, even though we took a
945 * reference in mono_thread_attach (), because the GC will do it
946 * when the Thread object is finalised.
953 MonoInternalThread *thread = mono_thread_internal_current ();
955 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
957 thread_cleanup (thread);
958 SET_CURRENT_OBJECT (NULL);
959 mono_domain_unset ();
961 /* we could add a callback here for embedders to use. */
962 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
963 exit (mono_environment_exitcode_get ());
968 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
970 MonoInternalThread *internal = create_internal_thread_object ();
972 internal->state = ThreadState_Unstarted;
973 internal->apartment_state = ThreadApartmentState_Unknown;
974 internal->managed_id = get_next_managed_thread_id ();
976 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
979 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
982 guint32 (*start_func)(void *);
983 struct StartInfo *start_info;
986 MonoInternalThread *internal;
988 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
990 if (!this->internal_thread)
991 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
992 internal = this->internal_thread;
994 ensure_synch_cs_set (internal);
996 EnterCriticalSection (internal->synch_cs);
998 if ((internal->state & ThreadState_Unstarted) == 0) {
999 LeaveCriticalSection (internal->synch_cs);
1000 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1004 if ((internal->state & ThreadState_Aborted) != 0) {
1005 LeaveCriticalSection (internal->synch_cs);
1010 /* This is freed in start_wrapper */
1011 start_info = g_new0 (struct StartInfo, 1);
1012 start_info->func = start_func;
1013 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1014 start_info->delegate = start;
1015 start_info->obj = this;
1016 g_assert (this->obj.vtable->domain == mono_domain_get ());
1018 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1019 if (internal->start_notify==NULL) {
1020 LeaveCriticalSection (internal->synch_cs);
1021 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1022 g_free (start_info);
1026 mono_threads_lock ();
1027 register_thread_start_argument (this, start_info);
1028 if (threads_starting_up == NULL) {
1029 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1030 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1032 mono_g_hash_table_insert (threads_starting_up, this, this);
1033 mono_threads_unlock ();
1035 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1036 CREATE_SUSPENDED, &tid);
1038 LeaveCriticalSection (internal->synch_cs);
1039 mono_threads_lock ();
1040 mono_g_hash_table_remove (threads_starting_up, this);
1041 mono_threads_unlock ();
1042 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1046 internal->handle=thread;
1048 internal->thread_pinning_ref = internal;
1049 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1052 /* Don't call handle_store() here, delay it to Start.
1053 * We can't join a thread (trying to will just block
1054 * forever) until it actually starts running, so don't
1055 * store the handle till then.
1058 mono_thread_start (this);
1060 internal->state &= ~ThreadState_Unstarted;
1062 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1064 LeaveCriticalSection (internal->synch_cs);
1069 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1071 MONO_ARCH_SAVE_REGS;
1073 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1076 CloseHandle (thread);
1078 if (this->synch_cs) {
1079 CRITICAL_SECTION *synch_cs = this->synch_cs;
1080 this->synch_cs = NULL;
1081 DeleteCriticalSection (synch_cs);
1086 void *name = this->name;
1092 static void mono_thread_start (MonoThread *thread)
1094 MonoInternalThread *internal = thread->internal_thread;
1096 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1098 /* Only store the handle when the thread is about to be
1099 * launched, to avoid the main thread deadlocking while trying
1100 * to clean up a thread that will never be signalled.
1102 if (!handle_store (thread))
1105 ResumeThread (internal->handle);
1107 if(internal->start_notify!=NULL) {
1108 /* Wait for the thread to set up its TLS data etc, so
1109 * theres no potential race condition if someone tries
1110 * to look up the data believing the thread has
1114 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1116 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1117 CloseHandle (internal->start_notify);
1118 internal->start_notify = NULL;
1121 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1124 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1127 MonoInternalThread *thread = mono_thread_internal_current ();
1129 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1131 mono_thread_current_check_pending_interrupt ();
1134 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1136 res = SleepEx(ms,TRUE);
1138 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1140 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1141 MonoException* exc = mono_thread_execute_interruption (thread);
1143 mono_raise_exception (exc);
1155 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1160 ves_icall_System_Threading_Thread_GetDomainID (void)
1162 MONO_ARCH_SAVE_REGS;
1164 return mono_domain_get()->domain_id;
1168 ves_icall_System_Threading_Thread_Yield (void)
1171 return SwitchToThread ();
1173 return sched_yield () == 0;
1178 * mono_thread_get_name:
1180 * Return the name of the thread. NAME_LEN is set to the length of the name.
1181 * Return NULL if the thread has no name. The returned memory is owned by the
1185 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1189 ensure_synch_cs_set (this_obj);
1191 EnterCriticalSection (this_obj->synch_cs);
1193 if (!this_obj->name) {
1197 *name_len = this_obj->name_len;
1198 res = g_new (gunichar2, this_obj->name_len);
1199 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1202 LeaveCriticalSection (this_obj->synch_cs);
1208 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1212 ensure_synch_cs_set (this_obj);
1214 EnterCriticalSection (this_obj->synch_cs);
1216 if (!this_obj->name)
1219 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1221 LeaveCriticalSection (this_obj->synch_cs);
1227 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1229 ensure_synch_cs_set (this_obj);
1231 EnterCriticalSection (this_obj->synch_cs);
1233 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1234 LeaveCriticalSection (this_obj->synch_cs);
1236 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1240 this_obj->name = g_new (gunichar2, mono_string_length (name));
1241 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1242 this_obj->name_len = mono_string_length (name);
1245 this_obj->name = NULL;
1248 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1250 LeaveCriticalSection (this_obj->synch_cs);
1251 if (this_obj->name) {
1252 char *tname = mono_string_to_utf8 (name);
1253 mono_profiler_thread_name (this_obj->tid, tname);
1259 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1261 mono_thread_set_name_internal (this_obj, name, TRUE);
1264 /* If the array is already in the requested domain, we just return it,
1265 otherwise we return a copy in that domain. */
1267 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1274 if (mono_object_domain (arr) == domain)
1277 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1278 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1283 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1285 return byte_array_to_domain (arr, mono_get_root_domain ());
1289 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1291 return byte_array_to_domain (arr, mono_domain_get ());
1295 mono_thread_current (void)
1297 MonoDomain *domain = mono_domain_get ();
1298 MonoInternalThread *internal = mono_thread_internal_current ();
1299 MonoThread **current_thread_ptr;
1301 g_assert (internal);
1302 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1304 if (!*current_thread_ptr) {
1305 g_assert (domain != mono_get_root_domain ());
1306 *current_thread_ptr = new_thread_with_internal (domain, internal);
1308 return *current_thread_ptr;
1312 mono_thread_internal_current (void)
1314 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1315 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1319 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1320 int ms, HANDLE thread)
1322 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1325 mono_thread_current_check_pending_interrupt ();
1327 ensure_synch_cs_set (this);
1329 EnterCriticalSection (this->synch_cs);
1331 if ((this->state & ThreadState_Unstarted) != 0) {
1332 LeaveCriticalSection (this->synch_cs);
1334 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1338 LeaveCriticalSection (this->synch_cs);
1343 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1345 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1347 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1349 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1351 if(ret==WAIT_OBJECT_0) {
1352 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1357 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1362 /* FIXME: exitContext isnt documented */
1363 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1369 MonoObject *waitHandle;
1370 MonoInternalThread *thread = mono_thread_internal_current ();
1372 /* Do this WaitSleepJoin check before creating objects */
1373 mono_thread_current_check_pending_interrupt ();
1375 numhandles = mono_array_length(mono_handles);
1376 handles = g_new0(HANDLE, numhandles);
1378 for(i = 0; i < numhandles; i++) {
1379 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1380 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1387 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1389 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1391 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1395 if(ret==WAIT_FAILED) {
1396 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1398 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1399 /* Do we want to try again if we get
1400 * WAIT_IO_COMPLETION? The documentation for
1401 * WaitHandle doesn't give any clues. (We'd have to
1402 * fiddle with the timeout if we retry.)
1404 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1411 /* FIXME: exitContext isnt documented */
1412 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1414 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1418 MonoObject *waitHandle;
1419 MonoInternalThread *thread = mono_thread_internal_current ();
1422 /* Do this WaitSleepJoin check before creating objects */
1423 mono_thread_current_check_pending_interrupt ();
1425 numhandles = mono_array_length(mono_handles);
1426 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1429 for(i = 0; i < numhandles; i++) {
1430 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1431 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1438 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1440 start = (ms == -1) ? 0 : mono_msec_ticks ();
1442 ret = WaitForMultipleObjectsEx (numhandles, handles, FALSE, ms, TRUE);
1443 if (ret != WAIT_IO_COMPLETION)
1448 diff = mono_msec_ticks () - start;
1453 } while (ms == -1 || ms > 0);
1455 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1457 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1460 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1462 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1463 return ret - WAIT_OBJECT_0;
1465 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1466 return ret - WAIT_ABANDONED_0;
1473 /* FIXME: exitContext isnt documented */
1474 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1477 MonoInternalThread *thread = mono_thread_internal_current ();
1479 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1485 mono_thread_current_check_pending_interrupt ();
1487 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1489 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1491 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1493 if(ret==WAIT_FAILED) {
1494 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1496 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1497 /* Do we want to try again if we get
1498 * WAIT_IO_COMPLETION? The documentation for
1499 * WaitHandle doesn't give any clues. (We'd have to
1500 * fiddle with the timeout if we retry.)
1502 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1510 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1513 MonoInternalThread *thread = mono_thread_internal_current ();
1515 MONO_ARCH_SAVE_REGS;
1520 mono_thread_current_check_pending_interrupt ();
1522 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1524 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1526 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1528 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1531 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1535 MONO_ARCH_SAVE_REGS;
1540 mutex = CreateMutex (NULL, owned, NULL);
1542 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1544 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1552 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1553 MONO_ARCH_SAVE_REGS;
1555 return(ReleaseMutex (handle));
1558 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1564 MONO_ARCH_SAVE_REGS;
1566 *error = ERROR_SUCCESS;
1568 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1570 *error = GetLastError ();
1577 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1581 MONO_ARCH_SAVE_REGS;
1586 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1588 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1589 mono_string_chars (name));
1591 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1599 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1603 MONO_ARCH_SAVE_REGS;
1605 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1610 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1614 MONO_ARCH_SAVE_REGS;
1616 *error = ERROR_SUCCESS;
1618 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1620 *error = GetLastError ();
1626 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1630 MONO_ARCH_SAVE_REGS;
1635 event = CreateEvent (NULL, manual, initial, NULL);
1637 event = CreateEvent (NULL, manual, initial,
1638 mono_string_chars (name));
1640 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1648 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1649 MONO_ARCH_SAVE_REGS;
1651 return (SetEvent(handle));
1654 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1655 MONO_ARCH_SAVE_REGS;
1657 return (ResetEvent(handle));
1661 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1662 MONO_ARCH_SAVE_REGS;
1664 CloseHandle (handle);
1667 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1673 MONO_ARCH_SAVE_REGS;
1675 *error = ERROR_SUCCESS;
1677 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1679 *error = GetLastError ();
1685 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1687 MONO_ARCH_SAVE_REGS;
1689 return InterlockedIncrement (location);
1692 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1696 MONO_ARCH_SAVE_REGS;
1698 mono_interlocked_lock ();
1702 mono_interlocked_unlock ();
1708 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1710 MONO_ARCH_SAVE_REGS;
1712 return InterlockedDecrement(location);
1715 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1719 MONO_ARCH_SAVE_REGS;
1721 mono_interlocked_lock ();
1725 mono_interlocked_unlock ();
1730 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1732 MONO_ARCH_SAVE_REGS;
1734 return InterlockedExchange(location, value);
1737 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1740 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1741 mono_gc_wbarrier_generic_nostore (location);
1745 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1747 return InterlockedExchangePointer(location, value);
1750 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1752 IntFloatUnion val, ret;
1754 MONO_ARCH_SAVE_REGS;
1757 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1763 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1765 #if SIZEOF_VOID_P == 8
1766 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1771 * According to MSDN, this function is only atomic with regards to the
1772 * other Interlocked functions on 32 bit platforms.
1774 mono_interlocked_lock ();
1777 mono_interlocked_unlock ();
1784 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1786 #if SIZEOF_VOID_P == 8
1787 LongDoubleUnion val, ret;
1790 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1797 * According to MSDN, this function is only atomic with regards to the
1798 * other Interlocked functions on 32 bit platforms.
1800 mono_interlocked_lock ();
1803 mono_interlocked_unlock ();
1809 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1811 MONO_ARCH_SAVE_REGS;
1813 return InterlockedCompareExchange(location, value, comparand);
1816 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1819 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1820 mono_gc_wbarrier_generic_nostore (location);
1824 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1826 return InterlockedCompareExchangePointer(location, value, comparand);
1829 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1831 IntFloatUnion val, ret, cmp;
1833 MONO_ARCH_SAVE_REGS;
1836 cmp.fval = comparand;
1837 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1843 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1845 #if SIZEOF_VOID_P == 8
1846 LongDoubleUnion val, comp, ret;
1849 comp.fval = comparand;
1850 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1856 mono_interlocked_lock ();
1858 if (old == comparand)
1860 mono_interlocked_unlock ();
1867 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1869 #if SIZEOF_VOID_P == 8
1870 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1874 mono_interlocked_lock ();
1876 if (old == comparand)
1878 mono_interlocked_unlock ();
1885 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1888 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1889 mono_gc_wbarrier_generic_nostore (location);
1894 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1897 res = InterlockedExchangePointer ((gpointer *)location, value);
1898 mono_gc_wbarrier_generic_nostore (location);
1903 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1905 #if SIZEOF_VOID_P == 8
1906 /* Should be implemented as a JIT intrinsic */
1907 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1912 mono_interlocked_lock ();
1914 *location = orig + value;
1915 mono_interlocked_unlock ();
1917 return orig + value;
1922 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1924 #if SIZEOF_VOID_P == 8
1925 /* Should be implemented as a JIT intrinsic */
1926 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1931 mono_interlocked_lock ();
1933 *location = orig + value;
1934 mono_interlocked_unlock ();
1936 return orig + value;
1941 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1943 #if SIZEOF_VOID_P == 8
1944 /* 64 bit reads are already atomic */
1949 mono_interlocked_lock ();
1951 mono_interlocked_unlock ();
1958 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1960 mono_threads_lock ();
1961 mono_threads_unlock ();
1965 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1967 mono_thread_clr_state (this, state);
1969 if (state & ThreadState_Background) {
1970 /* If the thread changes the background mode, the main thread has to
1971 * be notified, since it has to rebuild the list of threads to
1974 SetEvent (background_change_event);
1979 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1981 mono_thread_set_state (this, state);
1983 if (state & ThreadState_Background) {
1984 /* If the thread changes the background mode, the main thread has to
1985 * be notified, since it has to rebuild the list of threads to
1988 SetEvent (background_change_event);
1993 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1997 ensure_synch_cs_set (this);
1999 EnterCriticalSection (this->synch_cs);
2001 state = this->state;
2003 LeaveCriticalSection (this->synch_cs);
2008 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2010 MonoInternalThread *current;
2013 ensure_synch_cs_set (this);
2015 current = mono_thread_internal_current ();
2017 EnterCriticalSection (this->synch_cs);
2019 this->thread_interrupt_requested = TRUE;
2020 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2022 LeaveCriticalSection (this->synch_cs);
2025 abort_thread_internal (this, TRUE, FALSE);
2029 void mono_thread_current_check_pending_interrupt ()
2031 MonoInternalThread *thread = mono_thread_internal_current ();
2032 gboolean throw = FALSE;
2034 mono_debugger_check_interruption ();
2036 ensure_synch_cs_set (thread);
2038 EnterCriticalSection (thread->synch_cs);
2040 if (thread->thread_interrupt_requested) {
2042 thread->thread_interrupt_requested = FALSE;
2045 LeaveCriticalSection (thread->synch_cs);
2048 mono_raise_exception (mono_get_exception_thread_interrupted ());
2053 mono_thread_get_abort_signal (void)
2065 static int abort_signum = -1;
2067 if (abort_signum != -1)
2068 return abort_signum;
2069 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2070 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2071 struct sigaction sinfo;
2072 sigaction (i, NULL, &sinfo);
2073 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2078 /* fallback to the old way */
2081 #endif /* HOST_WIN32 */
2085 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2087 MonoException* exc = mono_thread_request_interruption (FALSE);
2088 if (exc) mono_raise_exception (exc);
2090 #endif /* HOST_WIN32 */
2093 * signal_thread_state_change
2095 * Tells the thread that his state has changed and it has to enter the new
2096 * state as soon as possible.
2098 static void signal_thread_state_change (MonoInternalThread *thread)
2100 if (thread == mono_thread_internal_current ()) {
2101 /* Do it synchronously */
2102 MonoException *exc = mono_thread_request_interruption (FALSE);
2104 mono_raise_exception (exc);
2108 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2110 /* fixme: store the state somewhere */
2111 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2114 * This will cause waits to be broken.
2115 * It will also prevent the thread from entering a wait, so if the thread returns
2116 * from the wait before it receives the abort signal, it will just spin in the wait
2117 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2120 wapi_interrupt_thread (thread->handle);
2121 #endif /* HOST_WIN32 */
2125 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2127 ensure_synch_cs_set (thread);
2129 EnterCriticalSection (thread->synch_cs);
2131 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2132 (thread->state & ThreadState_StopRequested) != 0 ||
2133 (thread->state & ThreadState_Stopped) != 0)
2135 LeaveCriticalSection (thread->synch_cs);
2139 if ((thread->state & ThreadState_Unstarted) != 0) {
2140 thread->state |= ThreadState_Aborted;
2141 LeaveCriticalSection (thread->synch_cs);
2145 thread->state |= ThreadState_AbortRequested;
2146 if (thread->abort_state_handle)
2147 mono_gchandle_free (thread->abort_state_handle);
2149 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2150 g_assert (thread->abort_state_handle);
2152 thread->abort_state_handle = 0;
2154 thread->abort_exc = NULL;
2157 * abort_exc is set in mono_thread_execute_interruption(),
2158 * triggered by the call to signal_thread_state_change(),
2159 * below. There's a point between where we have
2160 * abort_state_handle set, but abort_exc NULL, but that's not
2164 LeaveCriticalSection (thread->synch_cs);
2166 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2168 /* During shutdown, we can't wait for other threads */
2170 /* Make sure the thread is awake */
2171 mono_thread_resume (thread);
2173 abort_thread_internal (thread, TRUE, TRUE);
2177 ves_icall_System_Threading_Thread_ResetAbort (void)
2179 MonoInternalThread *thread = mono_thread_internal_current ();
2180 gboolean was_aborting;
2182 ensure_synch_cs_set (thread);
2184 EnterCriticalSection (thread->synch_cs);
2185 was_aborting = thread->state & ThreadState_AbortRequested;
2186 thread->state &= ~ThreadState_AbortRequested;
2187 LeaveCriticalSection (thread->synch_cs);
2189 if (!was_aborting) {
2190 const char *msg = "Unable to reset abort because no abort was requested";
2191 mono_raise_exception (mono_get_exception_thread_state (msg));
2193 thread->abort_exc = NULL;
2194 if (thread->abort_state_handle) {
2195 mono_gchandle_free (thread->abort_state_handle);
2196 /* This is actually not necessary - the handle
2197 only counts if the exception is set */
2198 thread->abort_state_handle = 0;
2203 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2205 ensure_synch_cs_set (thread);
2207 EnterCriticalSection (thread->synch_cs);
2209 thread->state &= ~ThreadState_AbortRequested;
2211 if (thread->abort_exc) {
2212 thread->abort_exc = NULL;
2213 if (thread->abort_state_handle) {
2214 mono_gchandle_free (thread->abort_state_handle);
2215 /* This is actually not necessary - the handle
2216 only counts if the exception is set */
2217 thread->abort_state_handle = 0;
2221 LeaveCriticalSection (thread->synch_cs);
2225 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2227 MonoInternalThread *thread = this->internal_thread;
2228 MonoObject *state, *deserialized = NULL, *exc;
2231 if (!thread->abort_state_handle)
2234 state = mono_gchandle_get_target (thread->abort_state_handle);
2237 domain = mono_domain_get ();
2238 if (mono_object_domain (state) == domain)
2241 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2243 if (!deserialized) {
2244 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2246 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2247 mono_raise_exception (invalid_op_exc);
2250 return deserialized;
2254 mono_thread_suspend (MonoInternalThread *thread)
2256 ensure_synch_cs_set (thread);
2258 EnterCriticalSection (thread->synch_cs);
2260 if ((thread->state & ThreadState_Unstarted) != 0 ||
2261 (thread->state & ThreadState_Aborted) != 0 ||
2262 (thread->state & ThreadState_Stopped) != 0)
2264 LeaveCriticalSection (thread->synch_cs);
2268 if ((thread->state & ThreadState_Suspended) != 0 ||
2269 (thread->state & ThreadState_SuspendRequested) != 0 ||
2270 (thread->state & ThreadState_StopRequested) != 0)
2272 LeaveCriticalSection (thread->synch_cs);
2276 thread->state |= ThreadState_SuspendRequested;
2278 LeaveCriticalSection (thread->synch_cs);
2280 suspend_thread_internal (thread, FALSE);
2285 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2287 if (!mono_thread_suspend (thread))
2288 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2292 mono_thread_resume (MonoInternalThread *thread)
2294 ensure_synch_cs_set (thread);
2296 EnterCriticalSection (thread->synch_cs);
2298 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2299 thread->state &= ~ThreadState_SuspendRequested;
2300 LeaveCriticalSection (thread->synch_cs);
2304 if ((thread->state & ThreadState_Suspended) == 0 ||
2305 (thread->state & ThreadState_Unstarted) != 0 ||
2306 (thread->state & ThreadState_Aborted) != 0 ||
2307 (thread->state & ThreadState_Stopped) != 0)
2309 LeaveCriticalSection (thread->synch_cs);
2313 return resume_thread_internal (thread);
2317 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2319 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2320 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2324 mono_threads_is_critical_method (MonoMethod *method)
2326 switch (method->wrapper_type) {
2327 case MONO_WRAPPER_RUNTIME_INVOKE:
2328 case MONO_WRAPPER_XDOMAIN_INVOKE:
2329 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2336 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2341 if (mono_threads_is_critical_method (m)) {
2342 *((gboolean*)data) = TRUE;
2349 is_running_protected_wrapper (void)
2351 gboolean found = FALSE;
2352 mono_stack_walk (find_wrapper, &found);
2356 void mono_thread_internal_stop (MonoInternalThread *thread)
2358 ensure_synch_cs_set (thread);
2360 EnterCriticalSection (thread->synch_cs);
2362 if ((thread->state & ThreadState_StopRequested) != 0 ||
2363 (thread->state & ThreadState_Stopped) != 0)
2365 LeaveCriticalSection (thread->synch_cs);
2369 /* Make sure the thread is awake */
2370 mono_thread_resume (thread);
2372 thread->state |= ThreadState_StopRequested;
2373 thread->state &= ~ThreadState_AbortRequested;
2375 LeaveCriticalSection (thread->synch_cs);
2377 abort_thread_internal (thread, TRUE, TRUE);
2380 void mono_thread_stop (MonoThread *thread)
2382 mono_thread_internal_stop (thread->internal_thread);
2386 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2388 return *((volatile gint8 *) (ptr));
2392 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2394 return *((volatile gint16 *) (ptr));
2398 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2400 return *((volatile gint32 *) (ptr));
2404 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2406 return *((volatile gint64 *) (ptr));
2410 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2412 return (void *) *((volatile void **) ptr);
2416 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2418 return *((volatile double *) (ptr));
2422 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2424 return *((volatile float *) (ptr));
2428 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2430 *((volatile gint8 *) ptr) = value;
2434 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2436 *((volatile gint16 *) ptr) = value;
2440 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2442 *((volatile gint32 *) ptr) = value;
2446 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2448 *((volatile gint64 *) ptr) = value;
2452 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2454 *((volatile void **) ptr) = value;
2458 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2460 mono_gc_wbarrier_generic_store (ptr, value);
2464 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2466 *((volatile double *) ptr) = value;
2470 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2472 *((volatile float *) ptr) = value;
2475 void mono_thread_init (MonoThreadStartCB start_cb,
2476 MonoThreadAttachCB attach_cb)
2478 InitializeCriticalSection(&threads_mutex);
2479 InitializeCriticalSection(&interlocked_mutex);
2480 InitializeCriticalSection(&contexts_mutex);
2482 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2483 g_assert(background_change_event != NULL);
2485 mono_init_static_data_info (&thread_static_info);
2486 mono_init_static_data_info (&context_static_info);
2488 MONO_FAST_TLS_INIT (tls_current_object);
2489 mono_native_tls_alloc (¤t_object_key, NULL);
2490 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2492 mono_thread_start_cb = start_cb;
2493 mono_thread_attach_cb = attach_cb;
2495 /* Get a pseudo handle to the current process. This is just a
2496 * kludge so that wapi can build a process handle if needed.
2497 * As a pseudo handle is returned, we don't need to clean
2500 GetCurrentProcess ();
2503 void mono_thread_cleanup (void)
2505 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2506 /* The main thread must abandon any held mutexes (particularly
2507 * important for named mutexes as they are shared across
2508 * processes, see bug 74680.) This will happen when the
2509 * thread exits, but if it's not running in a subthread it
2510 * won't exit in time.
2512 /* Using non-w32 API is a nasty kludge, but I couldn't find
2513 * anything in the documentation that would let me do this
2514 * here yet still be safe to call on windows.
2516 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2520 /* This stuff needs more testing, it seems one of these
2521 * critical sections can be locked when mono_thread_cleanup is
2524 DeleteCriticalSection (&threads_mutex);
2525 DeleteCriticalSection (&interlocked_mutex);
2526 DeleteCriticalSection (&contexts_mutex);
2527 DeleteCriticalSection (&delayed_free_table_mutex);
2528 DeleteCriticalSection (&small_id_mutex);
2529 CloseHandle (background_change_event);
2532 mono_native_tls_free (current_object_key);
2536 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2538 mono_thread_cleanup_fn = func;
2542 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2544 thread->internal_thread->manage_callback = func;
2547 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2549 mono_thread_notify_pending_exc_fn = func;
2553 static void print_tids (gpointer key, gpointer value, gpointer user)
2555 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2556 * sizeof(uint) and a cast to uint would overflow
2558 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2559 * print this as a pointer.
2561 g_message ("Waiting for: %p", key);
2566 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2567 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2571 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2575 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2577 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2579 if(ret==WAIT_FAILED) {
2580 /* See the comment in build_wait_tids() */
2581 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2585 for(i=0; i<wait->num; i++)
2586 CloseHandle (wait->handles[i]);
2588 if (ret == WAIT_TIMEOUT)
2591 for(i=0; i<wait->num; i++) {
2592 gsize tid = wait->threads[i]->tid;
2594 mono_threads_lock ();
2595 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2596 /* This thread must have been killed, because
2597 * it hasn't cleaned itself up. (It's just
2598 * possible that the thread exited before the
2599 * parent thread had a chance to store the
2600 * handle, and now there is another pointer to
2601 * the already-exited thread stored. In this
2602 * case, we'll just get two
2603 * mono_profiler_thread_end() calls for the
2607 mono_threads_unlock ();
2608 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2609 thread_cleanup (wait->threads[i]);
2611 mono_threads_unlock ();
2616 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2618 guint32 i, ret, count;
2620 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2622 /* Add the thread state change event, so it wakes up if a thread changes
2623 * to background mode.
2626 if (count < MAXIMUM_WAIT_OBJECTS) {
2627 wait->handles [count] = background_change_event;
2631 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2633 if(ret==WAIT_FAILED) {
2634 /* See the comment in build_wait_tids() */
2635 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2639 for(i=0; i<wait->num; i++)
2640 CloseHandle (wait->handles[i]);
2642 if (ret == WAIT_TIMEOUT)
2645 if (ret < wait->num) {
2646 gsize tid = wait->threads[ret]->tid;
2647 mono_threads_lock ();
2648 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2649 /* See comment in wait_for_tids about thread cleanup */
2650 mono_threads_unlock ();
2651 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2652 thread_cleanup (wait->threads [ret]);
2654 mono_threads_unlock ();
2658 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2660 struct wait_data *wait=(struct wait_data *)user;
2662 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2664 MonoInternalThread *thread=(MonoInternalThread *)value;
2666 /* Ignore background threads, we abort them later */
2667 /* Do not lock here since it is not needed and the caller holds threads_lock */
2668 if (thread->state & ThreadState_Background) {
2669 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2670 return; /* just leave, ignore */
2673 if (mono_gc_is_finalizer_internal_thread (thread)) {
2674 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2678 if (thread == mono_thread_internal_current ()) {
2679 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2683 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2684 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2688 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2689 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2693 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2694 if (handle == NULL) {
2695 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2699 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2700 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2701 wait->handles[wait->num]=handle;
2702 wait->threads[wait->num]=thread;
2705 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2707 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2712 /* Just ignore the rest, we can't do anything with
2719 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2721 struct wait_data *wait=(struct wait_data *)user;
2722 gsize self = GetCurrentThreadId ();
2723 MonoInternalThread *thread = value;
2726 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2729 /* The finalizer thread is not a background thread */
2730 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2731 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2733 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2737 /* printf ("A: %d\n", wait->num); */
2738 wait->handles[wait->num]=thread->handle;
2739 wait->threads[wait->num]=thread;
2742 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2743 mono_thread_internal_stop (thread);
2747 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2751 * mono_threads_set_shutting_down:
2753 * Is called by a thread that wants to shut down Mono. If the runtime is already
2754 * shutting down, the calling thread is suspended/stopped, and this function never
2758 mono_threads_set_shutting_down (void)
2760 MonoInternalThread *current_thread = mono_thread_internal_current ();
2762 mono_threads_lock ();
2764 if (shutting_down) {
2765 mono_threads_unlock ();
2767 /* Make sure we're properly suspended/stopped */
2769 EnterCriticalSection (current_thread->synch_cs);
2771 if ((current_thread->state & ThreadState_SuspendRequested) ||
2772 (current_thread->state & ThreadState_AbortRequested) ||
2773 (current_thread->state & ThreadState_StopRequested)) {
2774 LeaveCriticalSection (current_thread->synch_cs);
2775 mono_thread_execute_interruption (current_thread);
2777 current_thread->state |= ThreadState_Stopped;
2778 LeaveCriticalSection (current_thread->synch_cs);
2781 /*since we're killing the thread, unset the current domain.*/
2782 mono_domain_unset ();
2784 /* Wake up other threads potentially waiting for us */
2787 shutting_down = TRUE;
2789 /* Not really a background state change, but this will
2790 * interrupt the main thread if it is waiting for all
2791 * the other threads.
2793 SetEvent (background_change_event);
2795 mono_threads_unlock ();
2800 * mono_threads_is_shutting_down:
2802 * Returns whether a thread has commenced shutdown of Mono. Note that
2803 * if the function returns FALSE the caller must not assume that
2804 * shutdown is not in progress, because the situation might have
2805 * changed since the function returned. For that reason this function
2806 * is of very limited utility.
2809 mono_threads_is_shutting_down (void)
2811 return shutting_down;
2814 void mono_thread_manage (void)
2816 struct wait_data wait_data;
2817 struct wait_data *wait = &wait_data;
2819 memset (wait, 0, sizeof (struct wait_data));
2820 /* join each thread that's still running */
2821 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2823 mono_threads_lock ();
2825 THREAD_DEBUG (g_message("%s: No threads", __func__));
2826 mono_threads_unlock ();
2829 mono_threads_unlock ();
2832 mono_threads_lock ();
2833 if (shutting_down) {
2834 /* somebody else is shutting down */
2835 mono_threads_unlock ();
2838 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2839 mono_g_hash_table_foreach (threads, print_tids, NULL));
2841 ResetEvent (background_change_event);
2843 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2844 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2845 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2846 mono_threads_unlock ();
2848 /* Something to wait for */
2849 wait_for_tids_or_state_change (wait, INFINITE);
2851 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2852 } while(wait->num>0);
2854 mono_threads_set_shutting_down ();
2856 /* No new threads will be created after this point */
2858 mono_runtime_set_shutting_down ();
2860 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2861 mono_thread_pool_cleanup ();
2864 * Remove everything but the finalizer thread and self.
2865 * Also abort all the background threads
2868 mono_threads_lock ();
2871 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2872 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2873 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2875 mono_threads_unlock ();
2877 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2879 /* Something to wait for */
2880 wait_for_tids (wait, INFINITE);
2882 } while (wait->num > 0);
2885 * give the subthreads a chance to really quit (this is mainly needed
2886 * to get correct user and system times from getrusage/wait/time(1)).
2887 * This could be removed if we avoid pthread_detach() and use pthread_join().
2894 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2896 MonoInternalThread *thread=(MonoInternalThread *)value;
2898 if(thread->tid != (gsize)user) {
2899 /*TerminateThread (thread->handle, -1);*/
2903 void mono_thread_abort_all_other_threads (void)
2905 gsize self = GetCurrentThreadId ();
2907 mono_threads_lock ();
2908 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2909 mono_g_hash_table_size (threads));
2910 mono_g_hash_table_foreach (threads, print_tids, NULL));
2912 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2914 mono_threads_unlock ();
2918 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2920 MonoInternalThread *thread = (MonoInternalThread*)value;
2921 struct wait_data *wait = (struct wait_data*)user_data;
2925 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2927 * This needs no locking.
2929 if ((thread->state & ThreadState_Suspended) != 0 ||
2930 (thread->state & ThreadState_Stopped) != 0)
2933 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2934 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2938 wait->handles [wait->num] = handle;
2939 wait->threads [wait->num] = thread;
2945 * mono_thread_suspend_all_other_threads:
2947 * Suspend all managed threads except the finalizer thread and this thread. It is
2948 * not possible to resume them later.
2950 void mono_thread_suspend_all_other_threads (void)
2952 struct wait_data wait_data;
2953 struct wait_data *wait = &wait_data;
2955 gsize self = GetCurrentThreadId ();
2957 guint32 eventidx = 0;
2958 gboolean starting, finished;
2960 memset (wait, 0, sizeof (struct wait_data));
2962 * The other threads could be in an arbitrary state at this point, i.e.
2963 * they could be starting up, shutting down etc. This means that there could be
2964 * threads which are not even in the threads hash table yet.
2968 * First we set a barrier which will be checked by all threads before they
2969 * are added to the threads hash table, and they will exit if the flag is set.
2970 * This ensures that no threads could be added to the hash later.
2971 * We will use shutting_down as the barrier for now.
2973 g_assert (shutting_down);
2976 * We make multiple calls to WaitForMultipleObjects since:
2977 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
2978 * - some threads could exit without becoming suspended
2983 * Make a copy of the hashtable since we can't do anything with
2984 * threads while threads_mutex is held.
2987 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2988 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2989 mono_threads_lock ();
2990 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
2991 mono_threads_unlock ();
2993 events = g_new0 (gpointer, wait->num);
2995 /* Get the suspended events that we'll be waiting for */
2996 for (i = 0; i < wait->num; ++i) {
2997 MonoInternalThread *thread = wait->threads [i];
2998 gboolean signal_suspend = FALSE;
3000 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3001 //CloseHandle (wait->handles [i]);
3002 wait->threads [i] = NULL; /* ignore this thread in next loop */
3006 ensure_synch_cs_set (thread);
3008 EnterCriticalSection (thread->synch_cs);
3010 if (thread->suspended_event == NULL) {
3011 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3012 if (thread->suspended_event == NULL) {
3013 /* Forget this one and go on to the next */
3014 LeaveCriticalSection (thread->synch_cs);
3019 if ((thread->state & ThreadState_Suspended) != 0 ||
3020 (thread->state & ThreadState_StopRequested) != 0 ||
3021 (thread->state & ThreadState_Stopped) != 0) {
3022 LeaveCriticalSection (thread->synch_cs);
3023 CloseHandle (wait->handles [i]);
3024 wait->threads [i] = NULL; /* ignore this thread in next loop */
3028 if ((thread->state & ThreadState_SuspendRequested) == 0)
3029 signal_suspend = TRUE;
3031 events [eventidx++] = thread->suspended_event;
3033 /* Convert abort requests into suspend requests */
3034 if ((thread->state & ThreadState_AbortRequested) != 0)
3035 thread->state &= ~ThreadState_AbortRequested;
3037 thread->state |= ThreadState_SuspendRequested;
3039 LeaveCriticalSection (thread->synch_cs);
3041 /* Signal the thread to suspend */
3042 if (mono_thread_info_new_interrupt_enabled ())
3043 suspend_thread_internal (thread, TRUE);
3044 else if (signal_suspend)
3045 signal_thread_state_change (thread);
3048 /*Only wait on the suspend event if we are using the old path */
3049 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3050 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3051 for (i = 0; i < wait->num; ++i) {
3052 MonoInternalThread *thread = wait->threads [i];
3057 ensure_synch_cs_set (thread);
3059 EnterCriticalSection (thread->synch_cs);
3060 if ((thread->state & ThreadState_Suspended) != 0) {
3061 CloseHandle (thread->suspended_event);
3062 thread->suspended_event = NULL;
3064 LeaveCriticalSection (thread->synch_cs);
3068 if (eventidx <= 0) {
3070 * If there are threads which are starting up, we wait until they
3071 * are suspended when they try to register in the threads hash.
3072 * This is guaranteed to finish, since the threads which can create new
3073 * threads get suspended after a while.
3074 * FIXME: The finalizer thread can still create new threads.
3076 mono_threads_lock ();
3077 if (threads_starting_up)
3078 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3081 mono_threads_unlock ();
3093 collect_threads (gpointer key, gpointer value, gpointer user_data)
3095 MonoInternalThread *thread = (MonoInternalThread*)value;
3096 struct wait_data *wait = (struct wait_data*)user_data;
3099 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3100 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3104 wait->handles [wait->num] = handle;
3105 wait->threads [wait->num] = thread;
3110 static gboolean thread_dump_requested;
3112 static G_GNUC_UNUSED gboolean
3113 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3115 GString *p = (GString*)data;
3116 MonoMethod *method = NULL;
3118 method = frame->ji->method;
3121 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3122 g_string_append_printf (p, " %s\n", location);
3125 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3131 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3133 GString* text = g_string_new (0);
3135 GError *error = NULL;
3138 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3140 g_string_append_printf (text, "\n\"%s\"", name);
3143 else if (thread->threadpool_thread)
3144 g_string_append (text, "\n\"<threadpool thread>\"");
3146 g_string_append (text, "\n\"<unnamed thread>\"");
3149 /* This no longer works with remote unwinding */
3151 wapi_desc = wapi_current_thread_desc ();
3152 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3157 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3158 mono_thread_info_resume (mono_thread_info_get_tid (info));
3160 fprintf (stdout, "%s", text->str);
3162 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3163 OutputDebugStringA(text->str);
3166 g_string_free (text, TRUE);
3171 dump_thread (gpointer key, gpointer value, gpointer user)
3173 MonoInternalThread *thread = (MonoInternalThread *)value;
3174 MonoThreadInfo *info;
3176 if (thread == mono_thread_internal_current ())
3180 FIXME This still can hang if we stop a thread during malloc.
3181 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3182 that takes a callback and runs it with the target suspended.
3183 We probably should loop a bit around trying to get it to either managed code
3186 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3191 print_thread_dump (thread, info);
3195 mono_threads_perform_thread_dump (void)
3197 if (!thread_dump_requested)
3200 printf ("Full thread dump:\n");
3203 * Make a copy of the hashtable since we can't do anything with
3204 * threads while threads_mutex is held.
3206 mono_threads_lock ();
3207 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3208 mono_threads_unlock ();
3210 thread_dump_requested = FALSE;
3214 * mono_threads_request_thread_dump:
3216 * Ask all threads except the current to print their stacktrace to stdout.
3219 mono_threads_request_thread_dump (void)
3221 struct wait_data wait_data;
3222 struct wait_data *wait = &wait_data;
3225 /*The new thread dump code runs out of the finalizer thread. */
3226 if (mono_thread_info_new_interrupt_enabled ()) {
3227 thread_dump_requested = TRUE;
3228 mono_gc_finalize_notify ();
3233 memset (wait, 0, sizeof (struct wait_data));
3236 * Make a copy of the hashtable since we can't do anything with
3237 * threads while threads_mutex is held.
3239 mono_threads_lock ();
3240 mono_g_hash_table_foreach (threads, collect_threads, wait);
3241 mono_threads_unlock ();
3243 for (i = 0; i < wait->num; ++i) {
3244 MonoInternalThread *thread = wait->threads [i];
3246 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3247 (thread != mono_thread_internal_current ()) &&
3248 !thread->thread_dump_requested) {
3249 thread->thread_dump_requested = TRUE;
3251 signal_thread_state_change (thread);
3254 CloseHandle (wait->handles [i]);
3260 gint allocated; /* +1 so that refs [allocated] == NULL */
3264 typedef struct ref_stack RefStack;
3267 ref_stack_new (gint initial_size)
3271 initial_size = MAX (initial_size, 16) + 1;
3272 rs = g_new0 (RefStack, 1);
3273 rs->refs = g_new0 (gpointer, initial_size);
3274 rs->allocated = initial_size;
3279 ref_stack_destroy (gpointer ptr)
3290 ref_stack_push (RefStack *rs, gpointer ptr)
3292 g_assert (rs != NULL);
3294 if (rs->bottom >= rs->allocated) {
3295 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3296 rs->allocated <<= 1;
3297 rs->refs [rs->allocated] = NULL;
3299 rs->refs [rs->bottom++] = ptr;
3303 ref_stack_pop (RefStack *rs)
3305 if (rs == NULL || rs->bottom == 0)
3309 rs->refs [rs->bottom] = NULL;
3313 ref_stack_find (RefStack *rs, gpointer ptr)
3320 for (refs = rs->refs; refs && *refs; refs++) {
3328 * mono_thread_push_appdomain_ref:
3330 * Register that the current thread may have references to objects in domain
3331 * @domain on its stack. Each call to this function should be paired with a
3332 * call to pop_appdomain_ref.
3335 mono_thread_push_appdomain_ref (MonoDomain *domain)
3337 MonoInternalThread *thread = mono_thread_internal_current ();
3340 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3341 SPIN_LOCK (thread->lock_thread_id);
3342 if (thread->appdomain_refs == NULL)
3343 thread->appdomain_refs = ref_stack_new (16);
3344 ref_stack_push (thread->appdomain_refs, domain);
3345 SPIN_UNLOCK (thread->lock_thread_id);
3350 mono_thread_pop_appdomain_ref (void)
3352 MonoInternalThread *thread = mono_thread_internal_current ();
3355 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3356 SPIN_LOCK (thread->lock_thread_id);
3357 ref_stack_pop (thread->appdomain_refs);
3358 SPIN_UNLOCK (thread->lock_thread_id);
3363 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3366 SPIN_LOCK (thread->lock_thread_id);
3367 res = ref_stack_find (thread->appdomain_refs, domain);
3368 SPIN_UNLOCK (thread->lock_thread_id);
3373 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3375 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3378 typedef struct abort_appdomain_data {
3379 struct wait_data wait;
3381 } abort_appdomain_data;
3384 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3386 MonoInternalThread *thread = (MonoInternalThread*)value;
3387 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3388 MonoDomain *domain = data->domain;
3390 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3391 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3393 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3394 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3397 data->wait.handles [data->wait.num] = handle;
3398 data->wait.threads [data->wait.num] = thread;
3401 /* Just ignore the rest, we can't do anything with
3409 * mono_threads_abort_appdomain_threads:
3411 * Abort threads which has references to the given appdomain.
3414 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3416 abort_appdomain_data user_data;
3418 int orig_timeout = timeout;
3421 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3423 start_time = mono_msec_ticks ();
3425 mono_threads_lock ();
3427 user_data.domain = domain;
3428 user_data.wait.num = 0;
3429 /* This shouldn't take any locks */
3430 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3431 mono_threads_unlock ();
3433 if (user_data.wait.num > 0) {
3434 /* Abort the threads outside the threads lock */
3435 for (i = 0; i < user_data.wait.num; ++i)
3436 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3439 * We should wait for the threads either to abort, or to leave the
3440 * domain. We can't do the latter, so we wait with a timeout.
3442 wait_for_tids (&user_data.wait, 100);
3445 /* Update remaining time */
3446 timeout -= mono_msec_ticks () - start_time;
3447 start_time = mono_msec_ticks ();
3449 if (orig_timeout != -1 && timeout < 0)
3452 while (user_data.wait.num > 0);
3454 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3460 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3462 MonoInternalThread *thread = (MonoInternalThread*)value;
3463 MonoDomain *domain = (MonoDomain*)user_data;
3466 /* No locking needed here */
3467 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3469 if (thread->cached_culture_info) {
3470 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3471 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3472 if (obj && obj->vtable->domain == domain)
3473 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3479 * mono_threads_clear_cached_culture:
3481 * Clear the cached_current_culture from all threads if it is in the
3485 mono_threads_clear_cached_culture (MonoDomain *domain)
3487 mono_threads_lock ();
3488 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3489 mono_threads_unlock ();
3493 * mono_thread_get_undeniable_exception:
3495 * Return an exception which needs to be raised when leaving a catch clause.
3496 * This is used for undeniable exception propagation.
3499 mono_thread_get_undeniable_exception (void)
3501 MonoInternalThread *thread = mono_thread_internal_current ();
3503 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3505 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3506 * exception if the thread no longer references a dying appdomain.
3508 thread->abort_exc->trace_ips = NULL;
3509 thread->abort_exc->stack_trace = NULL;
3510 return thread->abort_exc;
3516 #if MONO_SMALL_CONFIG
3517 #define NUM_STATIC_DATA_IDX 4
3518 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3522 #define NUM_STATIC_DATA_IDX 8
3523 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3524 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3528 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3531 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3534 gpointer *static_data = addr;
3535 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3538 if (!static_data [i])
3540 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3541 ptr = static_data [i];
3542 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3543 uintptr_t bmap = static_reference_bitmaps [i][j];
3546 if ((bmap & 1) && *p) {
3557 * mono_alloc_static_data
3559 * Allocate memory blocks for storing threads or context static data
3562 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3564 guint idx = (offset >> 24) - 1;
3567 gpointer* static_data = *static_data_ptr;
3569 static void* tls_desc = NULL;
3570 if (mono_gc_user_markers_supported () && !tls_desc)
3571 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3572 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3573 *static_data_ptr = static_data;
3574 static_data [0] = static_data;
3577 for (i = 1; i <= idx; ++i) {
3578 if (static_data [i])
3580 if (mono_gc_user_markers_supported () && threadlocal)
3581 static_data [i] = g_malloc0 (static_data_size [i]);
3583 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3588 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3591 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3592 if (!static_data [i])
3594 if (mono_gc_user_markers_supported () && threadlocal)
3595 g_free (static_data [i]);
3597 mono_gc_free_fixed (static_data [i]);
3599 mono_gc_free_fixed (static_data);
3603 * mono_init_static_data_info
3605 * Initializes static data counters
3607 static void mono_init_static_data_info (StaticDataInfo *static_data)
3609 static_data->idx = 0;
3610 static_data->offset = 0;
3611 static_data->freelist = NULL;
3615 * mono_alloc_static_data_slot
3617 * Generates an offset for static data. static_data contains the counters
3618 * used to generate it.
3621 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3625 if (!static_data->idx && !static_data->offset) {
3627 * we use the first chunk of the first allocation also as
3628 * an array for the rest of the data
3630 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3632 static_data->offset += align - 1;
3633 static_data->offset &= ~(align - 1);
3634 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3635 static_data->idx ++;
3636 g_assert (size <= static_data_size [static_data->idx]);
3637 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3638 static_data->offset = 0;
3640 offset = static_data->offset | ((static_data->idx + 1) << 24);
3641 static_data->offset += size;
3646 * ensure thread static fields already allocated are valid for thread
3647 * This function is called when a thread is created or on thread attach.
3650 thread_adjust_static_data (MonoInternalThread *thread)
3654 mono_threads_lock ();
3655 if (thread_static_info.offset || thread_static_info.idx > 0) {
3656 /* get the current allocated size */
3657 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3658 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3660 mono_threads_unlock ();
3664 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3666 MonoInternalThread *thread = value;
3667 guint32 offset = GPOINTER_TO_UINT (user);
3669 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3672 static MonoThreadDomainTls*
3673 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3675 MonoThreadDomainTls* prev = NULL;
3676 MonoThreadDomainTls* tmp = static_data->freelist;
3678 if (tmp->size == size) {
3680 prev->next = tmp->next;
3682 static_data->freelist = tmp->next;
3691 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3694 int idx = (offset >> 24) - 1;
3696 if (!static_reference_bitmaps [idx])
3697 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3698 rb = static_reference_bitmaps [idx];
3700 offset /= sizeof (gpointer);
3701 /* offset is now the bitmap offset */
3702 for (i = 0; i < numbits; ++i) {
3703 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3704 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3709 clear_reference_bitmap (guint32 offset, guint32 size)
3711 int idx = (offset >> 24) - 1;
3713 rb = static_reference_bitmaps [idx];
3715 offset /= sizeof (gpointer);
3716 size /= sizeof (gpointer);
3718 /* offset is now the bitmap offset */
3719 for (; offset < size; ++offset)
3720 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3724 * The offset for a special static variable is composed of three parts:
3725 * a bit that indicates the type of static data (0:thread, 1:context),
3726 * an index in the array of chunks of memory for the thread (thread->static_data)
3727 * and an offset in that chunk of mem. This allows allocating less memory in the
3732 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3735 if (static_type == SPECIAL_STATIC_THREAD) {
3736 MonoThreadDomainTls *item;
3737 mono_threads_lock ();
3738 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3739 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3741 offset = item->offset;
3744 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3746 update_tls_reference_bitmap (offset, bitmap, numbits);
3747 /* This can be called during startup */
3748 if (threads != NULL)
3749 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3750 mono_threads_unlock ();
3752 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3753 mono_contexts_lock ();
3754 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3755 mono_contexts_unlock ();
3756 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3762 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3764 /* The high bit means either thread (0) or static (1) data. */
3766 guint32 static_type = (offset & 0x80000000);
3769 offset &= 0x7fffffff;
3770 idx = (offset >> 24) - 1;
3772 if (static_type == 0) {
3773 return get_thread_static_data (thread, offset);
3775 /* Allocate static data block under demand, since we don't have a list
3778 MonoAppContext *context = mono_context_get ();
3779 if (!context->static_data || !context->static_data [idx]) {
3780 mono_contexts_lock ();
3781 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3782 mono_contexts_unlock ();
3784 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3789 mono_get_special_static_data (guint32 offset)
3791 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3800 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3802 MonoInternalThread *thread = value;
3803 TlsOffsetSize *data = user;
3804 int idx = (data->offset >> 24) - 1;
3807 if (!thread->static_data || !thread->static_data [idx])
3809 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3810 mono_gc_bzero (ptr, data->size);
3814 do_free_special_slot (guint32 offset, guint32 size)
3816 guint32 static_type = (offset & 0x80000000);
3817 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3818 if (static_type == 0) {
3820 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3821 data.offset = offset & 0x7fffffff;
3823 clear_reference_bitmap (data.offset, data.size);
3824 if (threads != NULL)
3825 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3826 item->offset = offset;
3829 if (!mono_runtime_is_shutting_down ()) {
3830 item->next = thread_static_info.freelist;
3831 thread_static_info.freelist = item;
3833 /* We could be called during shutdown after mono_thread_cleanup () is called */
3837 /* FIXME: free context static data as well */
3842 do_free_special (gpointer key, gpointer value, gpointer data)
3844 MonoClassField *field = key;
3845 guint32 offset = GPOINTER_TO_UINT (value);
3848 size = mono_type_size (field->type, &align);
3849 do_free_special_slot (offset, size);
3853 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3855 mono_threads_lock ();
3856 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3857 mono_threads_unlock ();
3861 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3863 mono_threads_lock ();
3864 do_free_special_slot (offset, size);
3865 mono_threads_unlock ();
3869 * allocates room in the thread local area for storing an instance of the struct type
3870 * the allocation is kept track of in domain->tlsrec_list.
3873 mono_thread_alloc_tls (MonoReflectionType *type)
3875 MonoDomain *domain = mono_domain_get ();
3877 MonoTlsDataRecord *tlsrec;
3880 gsize default_bitmap [4] = {0};
3881 uint32_t tls_offset;
3885 klass = mono_class_from_mono_type (type->type);
3886 /* TlsDatum is a struct, so we subtract the object header size offset */
3887 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3888 size = mono_type_size (type->type, &align);
3889 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3890 if (bitmap != default_bitmap)
3892 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3893 tlsrec->tls_offset = tls_offset;
3894 tlsrec->size = size;
3895 mono_domain_lock (domain);
3896 tlsrec->next = domain->tlsrec_list;
3897 domain->tlsrec_list = tlsrec;
3898 mono_domain_unlock (domain);
3903 mono_thread_destroy_tls (uint32_t tls_offset)
3905 MonoTlsDataRecord *prev = NULL;
3906 MonoTlsDataRecord *cur;
3908 MonoDomain *domain = mono_domain_get ();
3909 mono_domain_lock (domain);
3910 cur = domain->tlsrec_list;
3912 if (cur->tls_offset == tls_offset) {
3914 prev->next = cur->next;
3916 domain->tlsrec_list = cur->next;
3924 mono_domain_unlock (domain);
3926 mono_special_static_data_free_slot (tls_offset, size);
3930 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3933 mono_thread_destroy_domain_tls (MonoDomain *domain)
3935 while (domain->tlsrec_list)
3936 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3939 static MonoClassField *local_slots = NULL;
3942 /* local tls data to get locals_slot from a thread */
3945 /* index in the locals_slot array */
3950 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3952 LocalSlotID *sid = user_data;
3953 MonoInternalThread *thread = (MonoInternalThread*)value;
3954 MonoArray *slots_array;
3956 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3957 * it is for the right domain, so we need to check if it is allocated an initialized
3958 * for the current thread.
3960 /*g_print ("handling thread %p\n", thread);*/
3961 if (!thread->static_data || !thread->static_data [sid->idx])
3963 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3964 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3966 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3970 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3978 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3980 g_warning ("local_slots field not found in Thread class");
3984 domain = mono_domain_get ();
3985 mono_domain_lock (domain);
3986 if (domain->special_static_fields)
3987 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3988 mono_domain_unlock (domain);
3991 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3992 sid.offset = GPOINTER_TO_UINT (addr);
3993 sid.offset &= 0x7fffffff;
3994 sid.idx = (sid.offset >> 24) - 1;
3995 mono_threads_lock ();
3996 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3997 mono_threads_unlock ();
3999 /* FIXME: clear the slot for MonoAppContexts, too */
4004 static void CALLBACK dummy_apc (ULONG_PTR param)
4008 static guint32 dummy_apc (gpointer param)
4015 * mono_thread_execute_interruption
4017 * Performs the operation that the requested thread state requires (abort,
4020 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4022 ensure_synch_cs_set (thread);
4024 EnterCriticalSection (thread->synch_cs);
4026 /* MonoThread::interruption_requested can only be changed with atomics */
4027 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4028 /* this will consume pending APC calls */
4029 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4030 InterlockedDecrement (&thread_interruption_requested);
4032 /* Clear the interrupted flag of the thread so it can wait again */
4033 wapi_clear_interruption ();
4037 if ((thread->state & ThreadState_AbortRequested) != 0) {
4038 LeaveCriticalSection (thread->synch_cs);
4039 if (thread->abort_exc == NULL) {
4041 * This might be racy, but it has to be called outside the lock
4042 * since it calls managed code.
4044 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4046 return thread->abort_exc;
4048 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4049 self_suspend_internal (thread);
4052 else if ((thread->state & ThreadState_StopRequested) != 0) {
4053 /* FIXME: do this through the JIT? */
4055 LeaveCriticalSection (thread->synch_cs);
4057 mono_thread_exit ();
4059 } else if (thread->pending_exception) {
4062 exc = thread->pending_exception;
4063 thread->pending_exception = NULL;
4065 LeaveCriticalSection (thread->synch_cs);
4067 } else if (thread->thread_interrupt_requested) {
4069 thread->thread_interrupt_requested = FALSE;
4070 LeaveCriticalSection (thread->synch_cs);
4072 return(mono_get_exception_thread_interrupted ());
4075 LeaveCriticalSection (thread->synch_cs);
4081 * mono_thread_request_interruption
4083 * A signal handler can call this method to request the interruption of a
4084 * thread. The result of the interruption will depend on the current state of
4085 * the thread. If the result is an exception that needs to be throw, it is
4086 * provided as return value.
4089 mono_thread_request_interruption (gboolean running_managed)
4091 MonoInternalThread *thread = mono_thread_internal_current ();
4093 /* The thread may already be stopping */
4098 if (thread->interrupt_on_stop &&
4099 thread->state & ThreadState_StopRequested &&
4100 thread->state & ThreadState_Background)
4104 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4106 InterlockedIncrement (&thread_interruption_requested);
4108 if (!running_managed || is_running_protected_wrapper ()) {
4109 /* Can't stop while in unmanaged code. Increase the global interruption
4110 request count. When exiting the unmanaged method the count will be
4111 checked and the thread will be interrupted. */
4114 if (mono_thread_notify_pending_exc_fn && !running_managed)
4115 /* The JIT will notify the thread about the interruption */
4116 /* This shouldn't take any locks */
4117 mono_thread_notify_pending_exc_fn ();
4119 /* this will awake the thread if it is in WaitForSingleObject
4121 /* Our implementation of this function ignores the func argument */
4122 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4126 return mono_thread_execute_interruption (thread);
4130 /*This function should be called by a thread after it has exited all of
4131 * its handle blocks at interruption time.*/
4133 mono_thread_resume_interruption (void)
4135 MonoInternalThread *thread = mono_thread_internal_current ();
4136 gboolean still_aborting;
4138 /* The thread may already be stopping */
4142 ensure_synch_cs_set (thread);
4143 EnterCriticalSection (thread->synch_cs);
4144 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4145 LeaveCriticalSection (thread->synch_cs);
4147 /*This can happen if the protected block called Thread::ResetAbort*/
4148 if (!still_aborting)
4151 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4153 InterlockedIncrement (&thread_interruption_requested);
4156 wapi_self_interrupt ();
4158 return mono_thread_execute_interruption (thread);
4161 gboolean mono_thread_interruption_requested ()
4163 if (thread_interruption_requested) {
4164 MonoInternalThread *thread = mono_thread_internal_current ();
4165 /* The thread may already be stopping */
4167 return (thread->interruption_requested);
4172 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4174 MonoInternalThread *thread = mono_thread_internal_current ();
4176 /* The thread may already be stopping */
4180 mono_debugger_check_interruption ();
4182 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4183 MonoException* exc = mono_thread_execute_interruption (thread);
4184 if (exc) mono_raise_exception (exc);
4189 * Performs the interruption of the current thread, if one has been requested,
4190 * and the thread is not running a protected wrapper.
4192 void mono_thread_interruption_checkpoint ()
4194 mono_thread_interruption_checkpoint_request (FALSE);
4198 * Performs the interruption of the current thread, if one has been requested.
4200 void mono_thread_force_interruption_checkpoint ()
4202 mono_thread_interruption_checkpoint_request (TRUE);
4206 * mono_thread_get_and_clear_pending_exception:
4208 * Return any pending exceptions for the current thread and clear it as a side effect.
4211 mono_thread_get_and_clear_pending_exception (void)
4213 MonoInternalThread *thread = mono_thread_internal_current ();
4215 /* The thread may already be stopping */
4219 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4220 return mono_thread_execute_interruption (thread);
4223 if (thread->pending_exception) {
4224 MonoException *exc = thread->pending_exception;
4226 thread->pending_exception = NULL;
4234 * mono_set_pending_exception:
4236 * Set the pending exception of the current thread to EXC.
4237 * The exception will be thrown when execution returns to managed code.
4240 mono_set_pending_exception (MonoException *exc)
4242 MonoInternalThread *thread = mono_thread_internal_current ();
4244 /* The thread may already be stopping */
4248 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4250 mono_thread_request_interruption (FALSE);
4254 * mono_thread_interruption_request_flag:
4256 * Returns the address of a flag that will be non-zero if an interruption has
4257 * been requested for a thread. The thread to interrupt may not be the current
4258 * thread, so an additional call to mono_thread_interruption_requested() or
4259 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4262 gint32* mono_thread_interruption_request_flag ()
4264 return &thread_interruption_requested;
4268 mono_thread_init_apartment_state (void)
4271 MonoInternalThread* thread = mono_thread_internal_current ();
4273 /* Positive return value indicates success, either
4274 * S_OK if this is first CoInitialize call, or
4275 * S_FALSE if CoInitialize already called, but with same
4276 * threading model. A negative value indicates failure,
4277 * probably due to trying to change the threading model.
4279 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4280 ? COINIT_APARTMENTTHREADED
4281 : COINIT_MULTITHREADED) < 0) {
4282 thread->apartment_state = ThreadApartmentState_Unknown;
4288 mono_thread_cleanup_apartment_state (void)
4291 MonoInternalThread* thread = mono_thread_internal_current ();
4293 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4300 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4302 ensure_synch_cs_set (thread);
4304 EnterCriticalSection (thread->synch_cs);
4305 thread->state |= state;
4306 LeaveCriticalSection (thread->synch_cs);
4310 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4312 ensure_synch_cs_set (thread);
4314 EnterCriticalSection (thread->synch_cs);
4315 thread->state &= ~state;
4316 LeaveCriticalSection (thread->synch_cs);
4320 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4322 gboolean ret = FALSE;
4324 ensure_synch_cs_set (thread);
4326 EnterCriticalSection (thread->synch_cs);
4328 if ((thread->state & test) != 0) {
4332 LeaveCriticalSection (thread->synch_cs);
4337 //static MonoClassField *execution_context_field;
4340 get_execution_context_addr (void)
4342 MonoDomain *domain = mono_domain_get ();
4343 guint32 offset = domain->execution_context_field_offset;
4346 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4349 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4351 mono_domain_lock (domain);
4352 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4353 mono_domain_unlock (domain);
4356 domain->execution_context_field_offset = offset;
4359 return (MonoObject**) mono_get_special_static_data (offset);
4363 mono_thread_get_execution_context (void)
4365 return *get_execution_context_addr ();
4369 mono_thread_set_execution_context (MonoObject *ec)
4371 *get_execution_context_addr () = ec;
4374 static gboolean has_tls_get = FALSE;
4377 mono_runtime_set_has_tls_get (gboolean val)
4383 mono_runtime_has_tls_get (void)
4389 mono_thread_kill (MonoInternalThread *thread, int signal)
4392 /* Win32 uses QueueUserAPC and callers of this are guarded */
4393 g_assert_not_reached ();
4395 # ifdef PTHREAD_POINTER_ID
4396 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4398 # ifdef PLATFORM_ANDROID
4399 if (thread->android_tid != 0) {
4401 int old_errno = errno;
4403 ret = tkill ((pid_t) thread->android_tid, signal);
4412 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4414 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4421 self_interrupt_thread (void *_unused)
4423 MonoThreadInfo *info = mono_thread_info_current ();
4424 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4425 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4426 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4427 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4431 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4435 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4439 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4441 MonoJitInfo **dest = data;
4447 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4449 MonoJitInfo *ji = NULL;
4450 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4455 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4458 MonoThreadInfo *info = NULL;
4459 gboolean protected_wrapper;
4460 gboolean running_managed;
4462 if (!mono_thread_info_new_interrupt_enabled ()) {
4463 signal_thread_state_change (thread);
4468 FIXME this is insanely broken, it doesn't cause interruption to happen
4469 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4471 if (thread == mono_thread_internal_current ()) {
4472 /* Do it synchronously */
4473 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4475 mono_raise_exception (exc);
4477 wapi_interrupt_thread (thread->handle);
4482 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4483 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4487 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4488 mono_thread_info_resume (mono_thread_info_get_tid (info));
4492 /*someone is already interrupting it*/
4493 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4494 mono_thread_info_resume (mono_thread_info_get_tid (info));
4497 InterlockedIncrement (&thread_interruption_requested);
4499 ji = mono_thread_info_get_last_managed (info);
4500 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4501 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4503 if (!protected_wrapper && running_managed) {
4504 /*We are in managed code*/
4505 /*Set the thread to call */
4506 if (install_async_abort)
4507 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4508 mono_thread_info_resume (mono_thread_info_get_tid (info));
4510 gpointer interrupt_handle;
4512 * This will cause waits to be broken.
4513 * It will also prevent the thread from entering a wait, so if the thread returns
4514 * from the wait before it receives the abort signal, it will just spin in the wait
4515 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4519 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4521 mono_thread_info_resume (mono_thread_info_get_tid (info));
4523 wapi_finish_interrupt_thread (interrupt_handle);
4526 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4530 transition_to_suspended (MonoInternalThread *thread)
4532 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4533 g_assert (0); /*FIXME we should not reach this */
4534 /*Make sure we balance the suspend count.*/
4535 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4537 thread->state &= ~ThreadState_SuspendRequested;
4538 thread->state |= ThreadState_Suspended;
4540 LeaveCriticalSection (thread->synch_cs);
4544 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4546 if (!mono_thread_info_new_interrupt_enabled ()) {
4547 signal_thread_state_change (thread);
4551 EnterCriticalSection (thread->synch_cs);
4552 if (thread == mono_thread_internal_current ()) {
4553 transition_to_suspended (thread);
4554 mono_thread_info_self_suspend ();
4556 MonoThreadInfo *info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt);
4557 MonoJitInfo *ji = mono_thread_info_get_last_managed (info);
4558 gboolean protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4559 gboolean running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4561 if (running_managed && !protected_wrapper) {
4562 transition_to_suspended (thread);
4564 gpointer interrupt_handle;
4566 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4567 InterlockedIncrement (&thread_interruption_requested);
4570 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4572 mono_thread_info_resume (mono_thread_info_get_tid (info));
4575 wapi_finish_interrupt_thread (interrupt_handle);
4577 LeaveCriticalSection (thread->synch_cs);
4582 /*This is called with @thread synch_cs held and it must release it*/
4584 self_suspend_internal (MonoInternalThread *thread)
4586 if (!mono_thread_info_new_interrupt_enabled ()) {
4587 thread->state &= ~ThreadState_SuspendRequested;
4588 thread->state |= ThreadState_Suspended;
4589 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4590 if (thread->suspend_event == NULL) {
4591 LeaveCriticalSection (thread->synch_cs);
4594 if (thread->suspended_event)
4595 SetEvent (thread->suspended_event);
4597 LeaveCriticalSection (thread->synch_cs);
4599 if (shutting_down) {
4600 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4605 WaitForSingleObject (thread->suspend_event, INFINITE);
4607 EnterCriticalSection (thread->synch_cs);
4609 CloseHandle (thread->suspend_event);
4610 thread->suspend_event = NULL;
4611 thread->state &= ~ThreadState_Suspended;
4613 /* The thread that requested the resume will have replaced this event
4614 * and will be waiting for it
4616 SetEvent (thread->resume_event);
4618 LeaveCriticalSection (thread->synch_cs);
4622 transition_to_suspended (thread);
4623 mono_thread_info_self_suspend ();
4626 /*This is called with @thread synch_cs held and it must release it*/
4628 resume_thread_internal (MonoInternalThread *thread)
4630 if (!mono_thread_info_new_interrupt_enabled ()) {
4631 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4632 if (thread->resume_event == NULL) {
4633 LeaveCriticalSection (thread->synch_cs);
4637 /* Awake the thread */
4638 SetEvent (thread->suspend_event);
4640 LeaveCriticalSection (thread->synch_cs);
4642 /* Wait for the thread to awake */
4643 WaitForSingleObject (thread->resume_event, INFINITE);
4644 CloseHandle (thread->resume_event);
4645 thread->resume_event = NULL;
4649 LeaveCriticalSection (thread->synch_cs);
4650 /* Awake the thread */
4651 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4653 EnterCriticalSection (thread->synch_cs);
4654 thread->state &= ~ThreadState_Suspended;
4655 LeaveCriticalSection (thread->synch_cs);