2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
20 #if defined(__OpenBSD__) || defined(__FreeBSD__)
22 #include <pthread_np.h>
25 #include <mono/metadata/object.h>
26 #include <mono/metadata/domain-internals.h>
27 #include <mono/metadata/profiler-private.h>
28 #include <mono/metadata/threads.h>
29 #include <mono/metadata/threadpool.h>
30 #include <mono/metadata/threads-types.h>
31 #include <mono/metadata/exception.h>
32 #include <mono/metadata/environment.h>
33 #include <mono/metadata/monitor.h>
34 #include <mono/metadata/gc-internal.h>
35 #include <mono/metadata/marshal.h>
36 #include <mono/io-layer/io-layer.h>
38 #include <mono/io-layer/threads.h>
40 #include <mono/metadata/object-internals.h>
41 #include <mono/metadata/mono-debug-debugger.h>
42 #include <mono/utils/mono-compiler.h>
43 #include <mono/utils/mono-mmap.h>
44 #include <mono/utils/mono-membar.h>
45 #include <mono/utils/mono-time.h>
46 #include <mono/utils/mono-threads.h>
47 #include <mono/utils/hazard-pointer.h>
48 #include <mono/utils/mono-tls.h>
50 #include <mono/metadata/gc-internal.h>
52 #ifdef PLATFORM_ANDROID
55 extern int tkill (pid_t tid, int signal);
58 #if defined(PLATFORM_MACOSX) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
59 void *pthread_get_stackaddr_np(pthread_t);
60 size_t pthread_get_stacksize_np(pthread_t);
63 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
64 #define THREAD_DEBUG(a)
65 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
66 #define THREAD_WAIT_DEBUG(a)
67 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
68 #define LIBGC_DEBUG(a)
70 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
71 #define SPIN_LOCK(i) do { \
72 if (SPIN_TRYLOCK (i)) \
76 #define SPIN_UNLOCK(i) i = 0
78 /* Provide this for systems with glib < 2.6 */
79 #ifndef G_GSIZE_FORMAT
80 # if GLIB_SIZEOF_LONG == 8
81 # define G_GSIZE_FORMAT "lu"
83 # define G_GSIZE_FORMAT "u"
89 guint32 (*func)(void *);
105 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
106 struct _MonoThreadDomainTls {
107 MonoThreadDomainTls *next;
115 MonoThreadDomainTls *freelist;
118 /* Number of cached culture objects in the MonoThread->cached_culture_info array
119 * (per-type): we use the first NUM entries for CultureInfo and the last for
120 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
122 #define NUM_CACHED_CULTURES 4
123 #define CULTURES_START_IDX 0
124 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
126 /* Controls access to the 'threads' hash table */
127 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
128 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
129 static CRITICAL_SECTION threads_mutex;
131 /* Controls access to context static data */
132 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
133 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
134 static CRITICAL_SECTION contexts_mutex;
136 /* Holds current status of static data heap */
137 static StaticDataInfo thread_static_info;
138 static StaticDataInfo context_static_info;
140 /* The hash of existing threads (key is thread ID, value is
141 * MonoInternalThread*) that need joining before exit
143 static MonoGHashTable *threads=NULL;
146 * Threads which are starting up and they are not in the 'threads' hash yet.
147 * When handle_store is called for a thread, it will be removed from this hash table.
148 * Protected by mono_threads_lock ().
150 static MonoGHashTable *threads_starting_up = NULL;
152 /* Maps a MonoThread to its start argument */
153 /* Protected by mono_threads_lock () */
154 static MonoGHashTable *thread_start_args = NULL;
156 /* The TLS key that holds the MonoObject assigned to each thread */
157 static MonoNativeTlsKey current_object_key;
159 #ifdef MONO_HAVE_FAST_TLS
160 /* we need to use both the Tls* functions and __thread because
161 * the gc needs to see all the threads
163 MONO_FAST_TLS_DECLARE(tls_current_object);
164 #define SET_CURRENT_OBJECT(x) do { \
165 MONO_FAST_TLS_SET (tls_current_object, x); \
166 mono_native_tls_set_value (current_object_key, x); \
168 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
170 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
171 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
174 /* function called at thread start */
175 static MonoThreadStartCB mono_thread_start_cb = NULL;
177 /* function called at thread attach */
178 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
180 /* function called at thread cleanup */
181 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
183 /* function called to notify the runtime about a pending exception on the current thread */
184 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
186 /* The default stack size for each thread */
187 static guint32 default_stacksize = 0;
188 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
190 static void thread_adjust_static_data (MonoInternalThread *thread);
191 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
192 static void mono_init_static_data_info (StaticDataInfo *static_data);
193 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
194 static gboolean mono_thread_resume (MonoInternalThread* thread);
195 static void mono_thread_start (MonoThread *thread);
196 static void signal_thread_state_change (MonoInternalThread *thread);
197 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
198 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
199 static void self_suspend_internal (MonoInternalThread *thread);
200 static gboolean resume_thread_internal (MonoInternalThread *thread);
202 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
203 static void ref_stack_destroy (gpointer rs);
205 /* Spin lock for InterlockedXXX 64 bit functions */
206 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
207 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
208 static CRITICAL_SECTION interlocked_mutex;
210 /* global count of thread interruptions requested */
211 static gint32 thread_interruption_requested = 0;
213 /* Event signaled when a thread changes its background mode */
214 static HANDLE background_change_event;
216 static gboolean shutting_down = FALSE;
218 static gint32 managed_thread_id_counter = 0;
221 get_next_managed_thread_id (void)
223 return InterlockedIncrement (&managed_thread_id_counter);
227 mono_thread_get_tls_key (void)
229 return current_object_key;
233 mono_thread_get_tls_offset (void)
236 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
240 /* handle_store() and handle_remove() manage the array of threads that
241 * still need to be waited for when the main thread exits.
243 * If handle_store() returns FALSE the thread must not be started
244 * because Mono is shutting down.
246 static gboolean handle_store(MonoThread *thread)
248 mono_threads_lock ();
250 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
252 if (threads_starting_up)
253 mono_g_hash_table_remove (threads_starting_up, thread);
256 mono_threads_unlock ();
261 MONO_GC_REGISTER_ROOT_FIXED (threads);
262 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
265 /* We don't need to duplicate thread->handle, because it is
266 * only closed when the thread object is finalized by the GC.
268 g_assert (thread->internal_thread);
269 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
270 thread->internal_thread);
272 mono_threads_unlock ();
277 static gboolean handle_remove(MonoInternalThread *thread)
280 gsize tid = thread->tid;
282 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
284 mono_threads_lock ();
287 /* We have to check whether the thread object for the
288 * tid is still the same in the table because the
289 * thread might have been destroyed and the tid reused
290 * in the meantime, in which case the tid would be in
291 * the table, but with another thread object.
293 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
294 mono_g_hash_table_remove (threads, (gpointer)tid);
303 mono_threads_unlock ();
305 /* Don't close the handle here, wait for the object finalizer
306 * to do it. Otherwise, the following race condition applies:
308 * 1) Thread exits (and handle_remove() closes the handle)
310 * 2) Some other handle is reassigned the same slot
312 * 3) Another thread tries to join the first thread, and
313 * blocks waiting for the reassigned handle to be signalled
314 * (which might never happen). This is possible, because the
315 * thread calling Join() still has a reference to the first
321 static void ensure_synch_cs_set (MonoInternalThread *thread)
323 CRITICAL_SECTION *synch_cs;
325 if (thread->synch_cs != NULL) {
329 synch_cs = g_new0 (CRITICAL_SECTION, 1);
330 InitializeCriticalSection (synch_cs);
332 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
333 synch_cs, NULL) != NULL) {
334 /* Another thread must have installed this CS */
335 DeleteCriticalSection (synch_cs);
341 * NOTE: this function can be called also for threads different from the current one:
342 * make sure no code called from it will ever assume it is run on the thread that is
343 * getting cleaned up.
345 static void thread_cleanup (MonoInternalThread *thread)
347 g_assert (thread != NULL);
349 if (thread->abort_state_handle) {
350 mono_gchandle_free (thread->abort_state_handle);
351 thread->abort_state_handle = 0;
353 thread->abort_exc = NULL;
354 thread->current_appcontext = NULL;
357 * This is necessary because otherwise we might have
358 * cross-domain references which will not get cleaned up when
359 * the target domain is unloaded.
361 if (thread->cached_culture_info) {
363 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
364 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
367 ensure_synch_cs_set (thread);
369 EnterCriticalSection (thread->synch_cs);
371 thread->state |= ThreadState_Stopped;
372 thread->state &= ~ThreadState_Background;
374 LeaveCriticalSection (thread->synch_cs);
377 An interruption request has leaked to cleanup. Adjust the global counter.
379 This can happen is the abort source thread finds the abortee (this) thread
380 in unmanaged code. If this thread never trips back to managed code or check
381 the local flag it will be left set and positively unbalance the global counter.
383 Leaving the counter unbalanced will cause a performance degradation since all threads
384 will now keep checking their local flags all the time.
386 if (InterlockedExchange (&thread->interruption_requested, 0))
387 InterlockedDecrement (&thread_interruption_requested);
389 /* if the thread is not in the hash it has been removed already */
390 if (!handle_remove (thread)) {
391 /* This needs to be called even if handle_remove () fails */
392 if (mono_thread_cleanup_fn)
393 mono_thread_cleanup_fn (thread);
396 mono_release_type_locks (thread);
398 mono_profiler_thread_end (thread->tid);
400 if (thread == mono_thread_internal_current ())
401 mono_thread_pop_appdomain_ref ();
403 thread->cached_culture_info = NULL;
405 mono_free_static_data (thread->static_data, TRUE);
406 thread->static_data = NULL;
407 ref_stack_destroy (thread->appdomain_refs);
408 thread->appdomain_refs = NULL;
410 if (mono_thread_cleanup_fn)
411 mono_thread_cleanup_fn (thread);
413 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
417 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
420 g_assert ((offset & 0x80000000) == 0);
421 offset &= 0x7fffffff;
422 idx = (offset >> 24) - 1;
423 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
427 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
429 static MonoClassField *current_thread_field = NULL;
433 if (!current_thread_field) {
434 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
435 g_assert (current_thread_field);
438 mono_class_vtable (domain, mono_defaults.thread_class);
439 mono_domain_lock (domain);
440 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
441 mono_domain_unlock (domain);
444 return get_thread_static_data (thread, offset);
448 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
450 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
452 g_assert (current->obj.vtable->domain == domain);
454 g_assert (!*current_thread_ptr);
455 *current_thread_ptr = current;
458 static MonoInternalThread*
459 create_internal_thread_object (void)
461 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
462 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
466 create_thread_object (MonoDomain *domain)
468 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
469 return (MonoThread*)mono_gc_alloc_mature (vt);
473 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
475 MonoThread *thread = create_thread_object (domain);
476 MONO_OBJECT_SETREF (thread, internal_thread, internal);
481 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
483 MonoDomain *domain = mono_get_root_domain ();
485 if (!candidate || candidate->obj.vtable->domain != domain)
486 candidate = new_thread_with_internal (domain, thread);
487 set_current_thread_for_domain (domain, thread, candidate);
488 g_assert (!thread->root_domain_thread);
489 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
492 static guint32 WINAPI start_wrapper_internal(void *data)
494 MonoThreadInfo *info;
495 struct StartInfo *start_info=(struct StartInfo *)data;
496 guint32 (*start_func)(void *);
500 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
503 MonoInternalThread *internal = start_info->obj->internal_thread;
504 MonoObject *start_delegate = start_info->delegate;
505 MonoDomain *domain = start_info->obj->obj.vtable->domain;
507 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
509 /* We can be sure start_info->obj->tid and
510 * start_info->obj->handle have been set, because the thread
511 * was created suspended, and these values were set before the
515 info = mono_thread_info_current ();
517 internal->thread_info = info;
522 SET_CURRENT_OBJECT (internal);
524 mono_monitor_init_tls ();
526 /* Every thread references the appdomain which created it */
527 mono_thread_push_appdomain_ref (domain);
529 if (!mono_domain_set (domain, FALSE)) {
530 /* No point in raising an appdomain_unloaded exception here */
531 /* FIXME: Cleanup here */
532 mono_thread_pop_appdomain_ref ();
536 start_func = start_info->func;
537 start_arg = start_info->start_arg;
539 /* We have to do this here because mono_thread_new_init()
540 requires that root_domain_thread is set up. */
541 thread_adjust_static_data (internal);
542 init_root_domain_thread (internal, start_info->obj);
544 /* This MUST be called before any managed code can be
545 * executed, as it calls the callback function that (for the
546 * jit) sets the lmf marker.
548 mono_thread_new_init (tid, &tid, start_func);
549 internal->stack_ptr = &tid;
551 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
553 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
555 /* On 2.0 profile (and higher), set explicitly since state might have been
557 if (internal->apartment_state == ThreadApartmentState_Unknown)
558 internal->apartment_state = ThreadApartmentState_MTA;
560 mono_thread_init_apartment_state ();
562 if(internal->start_notify!=NULL) {
563 /* Let the thread that called Start() know we're
566 ReleaseSemaphore (internal->start_notify, 1, NULL);
569 mono_threads_lock ();
570 mono_g_hash_table_remove (thread_start_args, start_info->obj);
571 mono_threads_unlock ();
573 mono_thread_set_execution_context (start_info->obj->ec_to_set);
574 start_info->obj->ec_to_set = NULL;
577 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
581 * Call this after calling start_notify, since the profiler callback might want
582 * to lock the thread, and the lock is held by thread_start () which waits for
585 mono_profiler_thread_start (tid);
587 /* start_func is set only for unmanaged start functions */
589 start_func (start_arg);
592 g_assert (start_delegate != NULL);
593 args [0] = start_arg;
594 /* we may want to handle the exception here. See comment below on unhandled exceptions */
595 mono_runtime_delegate_invoke (start_delegate, args, NULL);
598 /* If the thread calls ExitThread at all, this remaining code
599 * will not be executed, but the main thread will eventually
600 * call thread_cleanup() on this thread's behalf.
603 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
605 thread_cleanup (internal);
607 /* Do any cleanup needed for apartment state. This
608 * cannot be done in thread_cleanup since thread_cleanup could be
609 * called for a thread other than the current thread.
610 * mono_thread_cleanup_apartment_state cleans up apartment
611 * for the current thead */
612 mono_thread_cleanup_apartment_state ();
614 /* Remove the reference to the thread object in the TLS data,
615 * so the thread object can be finalized. This won't be
616 * reached if the thread threw an uncaught exception, so those
617 * thread handles will stay referenced :-( (This is due to
618 * missing support for scanning thread-specific data in the
619 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
622 SET_CURRENT_OBJECT (NULL);
623 mono_domain_unset ();
628 static guint32 WINAPI start_wrapper(void *data)
632 /* Avoid scanning the frames above this frame during a GC */
633 mono_gc_set_stack_end ((void*)&dummy);
635 return start_wrapper_internal (data);
638 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
640 if (mono_thread_start_cb) {
641 mono_thread_start_cb (tid, stack_start, func);
645 void mono_threads_set_default_stacksize (guint32 stacksize)
647 default_stacksize = stacksize;
650 guint32 mono_threads_get_default_stacksize (void)
652 return default_stacksize;
656 * mono_create_thread:
658 * This is a wrapper around CreateThread which handles differences in the type of
659 * the the 'tid' argument.
661 gpointer mono_create_thread (WapiSecurityAttributes *security,
662 guint32 stacksize, WapiThreadStart start,
663 gpointer param, guint32 create, gsize *tid)
670 res = mono_threads_CreateThread (security, stacksize, start, param, create, &real_tid);
674 res = CreateThread (security, stacksize, start, param, create, tid);
681 * The thread start argument may be an object reference, and there is
682 * no ref to keep it alive when the new thread is started but not yet
683 * registered with the collector. So we store it in a GC tracked hash
686 * LOCKING: Assumes the threads lock is held.
689 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
691 if (thread_start_args == NULL) {
692 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
693 thread_start_args = mono_g_hash_table_new (NULL, NULL);
695 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
698 MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
701 MonoInternalThread *internal;
702 HANDLE thread_handle;
703 struct StartInfo *start_info;
706 thread = create_thread_object (domain);
707 internal = create_internal_thread_object ();
708 MONO_OBJECT_SETREF (thread, internal_thread, internal);
710 start_info=g_new0 (struct StartInfo, 1);
711 start_info->func = func;
712 start_info->obj = thread;
713 start_info->start_arg = arg;
715 mono_threads_lock ();
717 mono_threads_unlock ();
721 if (threads_starting_up == NULL) {
722 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
723 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
726 register_thread_start_argument (thread, start_info);
727 mono_g_hash_table_insert (threads_starting_up, thread, thread);
728 mono_threads_unlock ();
731 stack_size = default_stacksize_for_thread (internal);
733 /* Create suspended, so we can do some housekeeping before the thread
736 thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
737 CREATE_SUSPENDED, &tid);
738 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
739 if (thread_handle == NULL) {
740 /* The thread couldn't be created, so throw an exception */
741 mono_threads_lock ();
742 mono_g_hash_table_remove (threads_starting_up, thread);
743 mono_threads_unlock ();
745 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
749 internal->handle=thread_handle;
751 internal->apartment_state=ThreadApartmentState_Unknown;
752 internal->thread_pinning_ref = internal;
753 internal->managed_id = get_next_managed_thread_id ();
754 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
756 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
757 InitializeCriticalSection (internal->synch_cs);
759 internal->threadpool_thread = threadpool_thread;
760 if (threadpool_thread)
761 mono_thread_set_state (internal, ThreadState_Background);
763 if (handle_store (thread))
764 ResumeThread (thread_handle);
766 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
767 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
773 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
775 mono_thread_create_internal (domain, func, arg, FALSE, 0);
779 * mono_thread_get_stack_bounds:
781 * Return the address and size of the current threads stack. Return NULL as the
782 * stack address if the stack address cannot be determined.
785 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
787 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
788 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
789 *stsize = pthread_get_stacksize_np (pthread_self ());
791 /* staddr points to the start of the stack, not the end */
793 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
795 /* FIXME: simplify the mess below */
796 #elif !defined(HOST_WIN32)
798 guint8 *current = (guint8*)&attr;
800 pthread_attr_init (&attr);
801 # ifdef HAVE_PTHREAD_GETATTR_NP
802 pthread_getattr_np (pthread_self(), &attr);
804 # ifdef HAVE_PTHREAD_ATTR_GET_NP
805 pthread_attr_get_np (pthread_self(), &attr);
808 pthread_attr_getstacksize (&attr, &stsize);
809 # elif defined(__OpenBSD__)
813 rslt = pthread_stackseg_np(pthread_self(), &ss);
814 g_assert (rslt == 0);
816 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
817 *stsize = ss.ss_size;
826 # if !defined(__OpenBSD__)
827 pthread_attr_getstack (&attr, (void**)staddr, stsize);
830 g_assert ((current > *staddr) && (current < *staddr + *stsize));
833 pthread_attr_destroy (&attr);
836 *stsize = (size_t)-1;
839 /* When running under emacs, sometimes staddr is not aligned to a page size */
840 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
844 mono_thread_attach (MonoDomain *domain)
846 MonoInternalThread *thread;
847 MonoThread *current_thread;
848 HANDLE thread_handle;
851 if ((thread = mono_thread_internal_current ())) {
852 if (domain != mono_domain_get ())
853 mono_domain_set (domain, TRUE);
854 /* Already attached */
855 return mono_thread_current ();
858 if (!mono_gc_register_thread (&domain)) {
859 g_error ("Thread %"G_GSIZE_FORMAT" calling into managed code is not registered with the GC. On UNIX, this can be fixed by #include-ing <gc.h> before <pthread.h> in the file containing the thread creation code.", GetCurrentThreadId ());
862 thread = create_internal_thread_object ();
864 thread_handle = GetCurrentThread ();
865 g_assert (thread_handle);
867 tid=GetCurrentThreadId ();
870 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
871 * refer to the thread from other threads for things like aborting.
873 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
874 THREAD_ALL_ACCESS, TRUE, 0);
876 thread->handle=thread_handle;
878 #ifdef PLATFORM_ANDROID
879 thread->android_tid = (gpointer) gettid ();
881 thread->apartment_state=ThreadApartmentState_Unknown;
882 thread->thread_pinning_ref = thread;
883 thread->managed_id = get_next_managed_thread_id ();
884 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
886 thread->stack_ptr = &tid;
888 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
889 InitializeCriticalSection (thread->synch_cs);
891 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
893 current_thread = new_thread_with_internal (domain, thread);
895 if (!handle_store (current_thread)) {
896 /* Mono is shutting down, so just wait for the end */
901 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
903 SET_CURRENT_OBJECT (thread);
904 mono_domain_set (domain, TRUE);
906 mono_monitor_init_tls ();
908 thread_adjust_static_data (thread);
910 init_root_domain_thread (thread, current_thread);
911 if (domain != mono_get_root_domain ())
912 set_current_thread_for_domain (domain, thread, current_thread);
915 if (mono_thread_attach_cb) {
919 mono_thread_get_stack_bounds (&staddr, &stsize);
922 mono_thread_attach_cb (tid, &tid);
924 mono_thread_attach_cb (tid, staddr + stsize);
927 // FIXME: Need a separate callback
928 mono_profiler_thread_start (tid);
930 return current_thread;
934 mono_thread_detach (MonoThread *thread)
936 g_return_if_fail (thread != NULL);
938 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
940 mono_profiler_thread_end (thread->internal_thread->tid);
942 thread_cleanup (thread->internal_thread);
944 SET_CURRENT_OBJECT (NULL);
945 mono_domain_unset ();
947 /* Don't need to CloseHandle this thread, even though we took a
948 * reference in mono_thread_attach (), because the GC will do it
949 * when the Thread object is finalised.
956 MonoInternalThread *thread = mono_thread_internal_current ();
958 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
960 thread_cleanup (thread);
961 SET_CURRENT_OBJECT (NULL);
962 mono_domain_unset ();
964 /* we could add a callback here for embedders to use. */
965 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
966 exit (mono_environment_exitcode_get ());
971 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
973 MonoInternalThread *internal = create_internal_thread_object ();
975 internal->state = ThreadState_Unstarted;
976 internal->apartment_state = ThreadApartmentState_Unknown;
977 internal->managed_id = get_next_managed_thread_id ();
979 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
982 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
985 guint32 (*start_func)(void *);
986 struct StartInfo *start_info;
989 MonoInternalThread *internal;
991 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
993 if (!this->internal_thread)
994 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
995 internal = this->internal_thread;
997 ensure_synch_cs_set (internal);
999 EnterCriticalSection (internal->synch_cs);
1001 if ((internal->state & ThreadState_Unstarted) == 0) {
1002 LeaveCriticalSection (internal->synch_cs);
1003 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1007 if ((internal->state & ThreadState_Aborted) != 0) {
1008 LeaveCriticalSection (internal->synch_cs);
1013 /* This is freed in start_wrapper */
1014 start_info = g_new0 (struct StartInfo, 1);
1015 start_info->func = start_func;
1016 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1017 start_info->delegate = start;
1018 start_info->obj = this;
1019 g_assert (this->obj.vtable->domain == mono_domain_get ());
1021 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1022 if (internal->start_notify==NULL) {
1023 LeaveCriticalSection (internal->synch_cs);
1024 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1025 g_free (start_info);
1029 mono_threads_lock ();
1030 register_thread_start_argument (this, start_info);
1031 if (threads_starting_up == NULL) {
1032 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1033 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1035 mono_g_hash_table_insert (threads_starting_up, this, this);
1036 mono_threads_unlock ();
1038 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1039 CREATE_SUSPENDED, &tid);
1041 LeaveCriticalSection (internal->synch_cs);
1042 mono_threads_lock ();
1043 mono_g_hash_table_remove (threads_starting_up, this);
1044 mono_threads_unlock ();
1045 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1049 internal->handle=thread;
1051 internal->thread_pinning_ref = internal;
1052 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1055 /* Don't call handle_store() here, delay it to Start.
1056 * We can't join a thread (trying to will just block
1057 * forever) until it actually starts running, so don't
1058 * store the handle till then.
1061 mono_thread_start (this);
1063 internal->state &= ~ThreadState_Unstarted;
1065 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1067 LeaveCriticalSection (internal->synch_cs);
1072 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1074 MONO_ARCH_SAVE_REGS;
1076 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1079 CloseHandle (thread);
1081 if (this->synch_cs) {
1082 CRITICAL_SECTION *synch_cs = this->synch_cs;
1083 this->synch_cs = NULL;
1084 DeleteCriticalSection (synch_cs);
1089 void *name = this->name;
1095 static void mono_thread_start (MonoThread *thread)
1097 MonoInternalThread *internal = thread->internal_thread;
1099 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1101 /* Only store the handle when the thread is about to be
1102 * launched, to avoid the main thread deadlocking while trying
1103 * to clean up a thread that will never be signalled.
1105 if (!handle_store (thread))
1108 ResumeThread (internal->handle);
1110 if(internal->start_notify!=NULL) {
1111 /* Wait for the thread to set up its TLS data etc, so
1112 * theres no potential race condition if someone tries
1113 * to look up the data believing the thread has
1117 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1119 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1120 CloseHandle (internal->start_notify);
1121 internal->start_notify = NULL;
1124 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1127 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1130 MonoInternalThread *thread = mono_thread_internal_current ();
1132 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1134 mono_thread_current_check_pending_interrupt ();
1137 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1139 res = SleepEx(ms,TRUE);
1141 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1143 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1144 MonoException* exc = mono_thread_execute_interruption (thread);
1146 mono_raise_exception (exc);
1158 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1163 ves_icall_System_Threading_Thread_GetDomainID (void)
1165 MONO_ARCH_SAVE_REGS;
1167 return mono_domain_get()->domain_id;
1171 ves_icall_System_Threading_Thread_Yield (void)
1174 return SwitchToThread ();
1176 return sched_yield () == 0;
1181 * mono_thread_get_name:
1183 * Return the name of the thread. NAME_LEN is set to the length of the name.
1184 * Return NULL if the thread has no name. The returned memory is owned by the
1188 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1192 ensure_synch_cs_set (this_obj);
1194 EnterCriticalSection (this_obj->synch_cs);
1196 if (!this_obj->name) {
1200 *name_len = this_obj->name_len;
1201 res = g_new (gunichar2, this_obj->name_len);
1202 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1205 LeaveCriticalSection (this_obj->synch_cs);
1211 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1215 ensure_synch_cs_set (this_obj);
1217 EnterCriticalSection (this_obj->synch_cs);
1219 if (!this_obj->name)
1222 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1224 LeaveCriticalSection (this_obj->synch_cs);
1230 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1232 ensure_synch_cs_set (this_obj);
1234 EnterCriticalSection (this_obj->synch_cs);
1236 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1237 LeaveCriticalSection (this_obj->synch_cs);
1239 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1243 this_obj->name = g_new (gunichar2, mono_string_length (name));
1244 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1245 this_obj->name_len = mono_string_length (name);
1248 this_obj->name = NULL;
1251 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1253 LeaveCriticalSection (this_obj->synch_cs);
1254 if (this_obj->name) {
1255 char *tname = mono_string_to_utf8 (name);
1256 mono_profiler_thread_name (this_obj->tid, tname);
1262 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1264 mono_thread_set_name_internal (this_obj, name, TRUE);
1267 /* If the array is already in the requested domain, we just return it,
1268 otherwise we return a copy in that domain. */
1270 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1277 if (mono_object_domain (arr) == domain)
1280 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1281 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1286 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1288 return byte_array_to_domain (arr, mono_get_root_domain ());
1292 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1294 return byte_array_to_domain (arr, mono_domain_get ());
1298 mono_thread_current (void)
1300 MonoDomain *domain = mono_domain_get ();
1301 MonoInternalThread *internal = mono_thread_internal_current ();
1302 MonoThread **current_thread_ptr;
1304 g_assert (internal);
1305 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1307 if (!*current_thread_ptr) {
1308 g_assert (domain != mono_get_root_domain ());
1309 *current_thread_ptr = new_thread_with_internal (domain, internal);
1311 return *current_thread_ptr;
1315 mono_thread_internal_current (void)
1317 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1318 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1322 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1323 int ms, HANDLE thread)
1325 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1328 mono_thread_current_check_pending_interrupt ();
1330 ensure_synch_cs_set (this);
1332 EnterCriticalSection (this->synch_cs);
1334 if ((this->state & ThreadState_Unstarted) != 0) {
1335 LeaveCriticalSection (this->synch_cs);
1337 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1341 LeaveCriticalSection (this->synch_cs);
1346 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1348 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1350 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1352 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1354 if(ret==WAIT_OBJECT_0) {
1355 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1360 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1365 /* FIXME: exitContext isnt documented */
1366 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1372 MonoObject *waitHandle;
1373 MonoInternalThread *thread = mono_thread_internal_current ();
1375 /* Do this WaitSleepJoin check before creating objects */
1376 mono_thread_current_check_pending_interrupt ();
1378 numhandles = mono_array_length(mono_handles);
1379 handles = g_new0(HANDLE, numhandles);
1381 for(i = 0; i < numhandles; i++) {
1382 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1383 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1390 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1392 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1394 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1398 if(ret==WAIT_FAILED) {
1399 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1401 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1402 /* Do we want to try again if we get
1403 * WAIT_IO_COMPLETION? The documentation for
1404 * WaitHandle doesn't give any clues. (We'd have to
1405 * fiddle with the timeout if we retry.)
1407 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1414 /* FIXME: exitContext isnt documented */
1415 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1417 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1421 MonoObject *waitHandle;
1422 MonoInternalThread *thread = mono_thread_internal_current ();
1425 /* Do this WaitSleepJoin check before creating objects */
1426 mono_thread_current_check_pending_interrupt ();
1428 numhandles = mono_array_length(mono_handles);
1429 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1432 for(i = 0; i < numhandles; i++) {
1433 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1434 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1441 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1443 start = (ms == -1) ? 0 : mono_msec_ticks ();
1445 ret = WaitForMultipleObjectsEx (numhandles, handles, FALSE, ms, TRUE);
1446 if (ret != WAIT_IO_COMPLETION)
1451 diff = mono_msec_ticks () - start;
1456 } while (ms == -1 || ms > 0);
1458 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1460 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1463 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1465 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1466 return ret - WAIT_OBJECT_0;
1468 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1469 return ret - WAIT_ABANDONED_0;
1476 /* FIXME: exitContext isnt documented */
1477 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1480 MonoInternalThread *thread = mono_thread_internal_current ();
1482 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1488 mono_thread_current_check_pending_interrupt ();
1490 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1492 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1494 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1496 if(ret==WAIT_FAILED) {
1497 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1499 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1500 /* Do we want to try again if we get
1501 * WAIT_IO_COMPLETION? The documentation for
1502 * WaitHandle doesn't give any clues. (We'd have to
1503 * fiddle with the timeout if we retry.)
1505 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1513 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1516 MonoInternalThread *thread = mono_thread_internal_current ();
1518 MONO_ARCH_SAVE_REGS;
1523 mono_thread_current_check_pending_interrupt ();
1525 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1527 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1529 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1531 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1534 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1538 MONO_ARCH_SAVE_REGS;
1543 mutex = CreateMutex (NULL, owned, NULL);
1545 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1547 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1555 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1556 MONO_ARCH_SAVE_REGS;
1558 return(ReleaseMutex (handle));
1561 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1567 MONO_ARCH_SAVE_REGS;
1569 *error = ERROR_SUCCESS;
1571 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1573 *error = GetLastError ();
1580 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1584 MONO_ARCH_SAVE_REGS;
1589 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1591 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1592 mono_string_chars (name));
1594 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1602 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1606 MONO_ARCH_SAVE_REGS;
1608 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1613 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1617 MONO_ARCH_SAVE_REGS;
1619 *error = ERROR_SUCCESS;
1621 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1623 *error = GetLastError ();
1629 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1633 MONO_ARCH_SAVE_REGS;
1638 event = CreateEvent (NULL, manual, initial, NULL);
1640 event = CreateEvent (NULL, manual, initial,
1641 mono_string_chars (name));
1643 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1651 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1652 MONO_ARCH_SAVE_REGS;
1654 return (SetEvent(handle));
1657 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1658 MONO_ARCH_SAVE_REGS;
1660 return (ResetEvent(handle));
1664 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1665 MONO_ARCH_SAVE_REGS;
1667 CloseHandle (handle);
1670 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1676 MONO_ARCH_SAVE_REGS;
1678 *error = ERROR_SUCCESS;
1680 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1682 *error = GetLastError ();
1688 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1690 MONO_ARCH_SAVE_REGS;
1692 return InterlockedIncrement (location);
1695 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1699 MONO_ARCH_SAVE_REGS;
1701 mono_interlocked_lock ();
1705 mono_interlocked_unlock ();
1711 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1713 MONO_ARCH_SAVE_REGS;
1715 return InterlockedDecrement(location);
1718 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1722 MONO_ARCH_SAVE_REGS;
1724 mono_interlocked_lock ();
1728 mono_interlocked_unlock ();
1733 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1735 MONO_ARCH_SAVE_REGS;
1737 return InterlockedExchange(location, value);
1740 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1743 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1744 mono_gc_wbarrier_generic_nostore (location);
1748 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1750 return InterlockedExchangePointer(location, value);
1753 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1755 IntFloatUnion val, ret;
1757 MONO_ARCH_SAVE_REGS;
1760 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1766 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1768 #if SIZEOF_VOID_P == 8
1769 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1774 * According to MSDN, this function is only atomic with regards to the
1775 * other Interlocked functions on 32 bit platforms.
1777 mono_interlocked_lock ();
1780 mono_interlocked_unlock ();
1787 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1789 #if SIZEOF_VOID_P == 8
1790 LongDoubleUnion val, ret;
1793 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1800 * According to MSDN, this function is only atomic with regards to the
1801 * other Interlocked functions on 32 bit platforms.
1803 mono_interlocked_lock ();
1806 mono_interlocked_unlock ();
1812 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1814 MONO_ARCH_SAVE_REGS;
1816 return InterlockedCompareExchange(location, value, comparand);
1819 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1822 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1823 mono_gc_wbarrier_generic_nostore (location);
1827 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1829 return InterlockedCompareExchangePointer(location, value, comparand);
1832 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1834 IntFloatUnion val, ret, cmp;
1836 MONO_ARCH_SAVE_REGS;
1839 cmp.fval = comparand;
1840 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1846 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1848 #if SIZEOF_VOID_P == 8
1849 LongDoubleUnion val, comp, ret;
1852 comp.fval = comparand;
1853 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1859 mono_interlocked_lock ();
1861 if (old == comparand)
1863 mono_interlocked_unlock ();
1870 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1872 #if SIZEOF_VOID_P == 8
1873 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1877 mono_interlocked_lock ();
1879 if (old == comparand)
1881 mono_interlocked_unlock ();
1888 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1891 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1892 mono_gc_wbarrier_generic_nostore (location);
1897 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1900 res = InterlockedExchangePointer ((gpointer *)location, value);
1901 mono_gc_wbarrier_generic_nostore (location);
1906 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1908 #if SIZEOF_VOID_P == 8
1909 /* Should be implemented as a JIT intrinsic */
1910 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1915 mono_interlocked_lock ();
1917 *location = orig + value;
1918 mono_interlocked_unlock ();
1920 return orig + value;
1925 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1927 #if SIZEOF_VOID_P == 8
1928 /* Should be implemented as a JIT intrinsic */
1929 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1934 mono_interlocked_lock ();
1936 *location = orig + value;
1937 mono_interlocked_unlock ();
1939 return orig + value;
1944 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1946 #if SIZEOF_VOID_P == 8
1947 /* 64 bit reads are already atomic */
1952 mono_interlocked_lock ();
1954 mono_interlocked_unlock ();
1961 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1963 mono_threads_lock ();
1964 mono_threads_unlock ();
1968 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1970 mono_thread_clr_state (this, state);
1972 if (state & ThreadState_Background) {
1973 /* If the thread changes the background mode, the main thread has to
1974 * be notified, since it has to rebuild the list of threads to
1977 SetEvent (background_change_event);
1982 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1984 mono_thread_set_state (this, state);
1986 if (state & ThreadState_Background) {
1987 /* If the thread changes the background mode, the main thread has to
1988 * be notified, since it has to rebuild the list of threads to
1991 SetEvent (background_change_event);
1996 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2000 ensure_synch_cs_set (this);
2002 EnterCriticalSection (this->synch_cs);
2004 state = this->state;
2006 LeaveCriticalSection (this->synch_cs);
2011 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2013 MonoInternalThread *current;
2016 ensure_synch_cs_set (this);
2018 current = mono_thread_internal_current ();
2020 EnterCriticalSection (this->synch_cs);
2022 this->thread_interrupt_requested = TRUE;
2023 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2025 LeaveCriticalSection (this->synch_cs);
2028 abort_thread_internal (this, TRUE, FALSE);
2032 void mono_thread_current_check_pending_interrupt ()
2034 MonoInternalThread *thread = mono_thread_internal_current ();
2035 gboolean throw = FALSE;
2037 mono_debugger_check_interruption ();
2039 ensure_synch_cs_set (thread);
2041 EnterCriticalSection (thread->synch_cs);
2043 if (thread->thread_interrupt_requested) {
2045 thread->thread_interrupt_requested = FALSE;
2048 LeaveCriticalSection (thread->synch_cs);
2051 mono_raise_exception (mono_get_exception_thread_interrupted ());
2056 mono_thread_get_abort_signal (void)
2068 static int abort_signum = -1;
2070 if (abort_signum != -1)
2071 return abort_signum;
2072 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2073 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2074 struct sigaction sinfo;
2075 sigaction (i, NULL, &sinfo);
2076 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2081 /* fallback to the old way */
2084 #endif /* HOST_WIN32 */
2088 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2090 MonoException* exc = mono_thread_request_interruption (FALSE);
2091 if (exc) mono_raise_exception (exc);
2093 #endif /* HOST_WIN32 */
2096 * signal_thread_state_change
2098 * Tells the thread that his state has changed and it has to enter the new
2099 * state as soon as possible.
2101 static void signal_thread_state_change (MonoInternalThread *thread)
2103 if (thread == mono_thread_internal_current ()) {
2104 /* Do it synchronously */
2105 MonoException *exc = mono_thread_request_interruption (FALSE);
2107 mono_raise_exception (exc);
2111 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2113 /* fixme: store the state somewhere */
2114 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2117 * This will cause waits to be broken.
2118 * It will also prevent the thread from entering a wait, so if the thread returns
2119 * from the wait before it receives the abort signal, it will just spin in the wait
2120 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2123 wapi_interrupt_thread (thread->handle);
2124 #endif /* HOST_WIN32 */
2128 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2130 ensure_synch_cs_set (thread);
2132 EnterCriticalSection (thread->synch_cs);
2134 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2135 (thread->state & ThreadState_StopRequested) != 0 ||
2136 (thread->state & ThreadState_Stopped) != 0)
2138 LeaveCriticalSection (thread->synch_cs);
2142 if ((thread->state & ThreadState_Unstarted) != 0) {
2143 thread->state |= ThreadState_Aborted;
2144 LeaveCriticalSection (thread->synch_cs);
2148 thread->state |= ThreadState_AbortRequested;
2149 if (thread->abort_state_handle)
2150 mono_gchandle_free (thread->abort_state_handle);
2152 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2153 g_assert (thread->abort_state_handle);
2155 thread->abort_state_handle = 0;
2157 thread->abort_exc = NULL;
2160 * abort_exc is set in mono_thread_execute_interruption(),
2161 * triggered by the call to signal_thread_state_change(),
2162 * below. There's a point between where we have
2163 * abort_state_handle set, but abort_exc NULL, but that's not
2167 LeaveCriticalSection (thread->synch_cs);
2169 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2171 /* During shutdown, we can't wait for other threads */
2173 /* Make sure the thread is awake */
2174 mono_thread_resume (thread);
2176 abort_thread_internal (thread, TRUE, TRUE);
2180 ves_icall_System_Threading_Thread_ResetAbort (void)
2182 MonoInternalThread *thread = mono_thread_internal_current ();
2183 gboolean was_aborting;
2185 ensure_synch_cs_set (thread);
2187 EnterCriticalSection (thread->synch_cs);
2188 was_aborting = thread->state & ThreadState_AbortRequested;
2189 thread->state &= ~ThreadState_AbortRequested;
2190 LeaveCriticalSection (thread->synch_cs);
2192 if (!was_aborting) {
2193 const char *msg = "Unable to reset abort because no abort was requested";
2194 mono_raise_exception (mono_get_exception_thread_state (msg));
2196 thread->abort_exc = NULL;
2197 if (thread->abort_state_handle) {
2198 mono_gchandle_free (thread->abort_state_handle);
2199 /* This is actually not necessary - the handle
2200 only counts if the exception is set */
2201 thread->abort_state_handle = 0;
2206 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2208 ensure_synch_cs_set (thread);
2210 EnterCriticalSection (thread->synch_cs);
2212 thread->state &= ~ThreadState_AbortRequested;
2214 if (thread->abort_exc) {
2215 thread->abort_exc = NULL;
2216 if (thread->abort_state_handle) {
2217 mono_gchandle_free (thread->abort_state_handle);
2218 /* This is actually not necessary - the handle
2219 only counts if the exception is set */
2220 thread->abort_state_handle = 0;
2224 LeaveCriticalSection (thread->synch_cs);
2228 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2230 MonoInternalThread *thread = this->internal_thread;
2231 MonoObject *state, *deserialized = NULL, *exc;
2234 if (!thread->abort_state_handle)
2237 state = mono_gchandle_get_target (thread->abort_state_handle);
2240 domain = mono_domain_get ();
2241 if (mono_object_domain (state) == domain)
2244 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2246 if (!deserialized) {
2247 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2249 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2250 mono_raise_exception (invalid_op_exc);
2253 return deserialized;
2257 mono_thread_suspend (MonoInternalThread *thread)
2259 ensure_synch_cs_set (thread);
2261 EnterCriticalSection (thread->synch_cs);
2263 if ((thread->state & ThreadState_Unstarted) != 0 ||
2264 (thread->state & ThreadState_Aborted) != 0 ||
2265 (thread->state & ThreadState_Stopped) != 0)
2267 LeaveCriticalSection (thread->synch_cs);
2271 if ((thread->state & ThreadState_Suspended) != 0 ||
2272 (thread->state & ThreadState_SuspendRequested) != 0 ||
2273 (thread->state & ThreadState_StopRequested) != 0)
2275 LeaveCriticalSection (thread->synch_cs);
2279 thread->state |= ThreadState_SuspendRequested;
2281 LeaveCriticalSection (thread->synch_cs);
2283 suspend_thread_internal (thread, FALSE);
2288 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2290 if (!mono_thread_suspend (thread))
2291 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2295 mono_thread_resume (MonoInternalThread *thread)
2297 ensure_synch_cs_set (thread);
2299 EnterCriticalSection (thread->synch_cs);
2301 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2302 thread->state &= ~ThreadState_SuspendRequested;
2303 LeaveCriticalSection (thread->synch_cs);
2307 if ((thread->state & ThreadState_Suspended) == 0 ||
2308 (thread->state & ThreadState_Unstarted) != 0 ||
2309 (thread->state & ThreadState_Aborted) != 0 ||
2310 (thread->state & ThreadState_Stopped) != 0)
2312 LeaveCriticalSection (thread->synch_cs);
2316 return resume_thread_internal (thread);
2320 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2322 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2323 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2327 mono_threads_is_critical_method (MonoMethod *method)
2329 switch (method->wrapper_type) {
2330 case MONO_WRAPPER_RUNTIME_INVOKE:
2331 case MONO_WRAPPER_XDOMAIN_INVOKE:
2332 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2339 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2344 if (mono_threads_is_critical_method (m)) {
2345 *((gboolean*)data) = TRUE;
2352 is_running_protected_wrapper (void)
2354 gboolean found = FALSE;
2355 mono_stack_walk (find_wrapper, &found);
2359 void mono_thread_internal_stop (MonoInternalThread *thread)
2361 ensure_synch_cs_set (thread);
2363 EnterCriticalSection (thread->synch_cs);
2365 if ((thread->state & ThreadState_StopRequested) != 0 ||
2366 (thread->state & ThreadState_Stopped) != 0)
2368 LeaveCriticalSection (thread->synch_cs);
2372 /* Make sure the thread is awake */
2373 mono_thread_resume (thread);
2375 thread->state |= ThreadState_StopRequested;
2376 thread->state &= ~ThreadState_AbortRequested;
2378 LeaveCriticalSection (thread->synch_cs);
2380 abort_thread_internal (thread, TRUE, TRUE);
2383 void mono_thread_stop (MonoThread *thread)
2385 mono_thread_internal_stop (thread->internal_thread);
2389 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2391 return *((volatile gint8 *) (ptr));
2395 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2397 return *((volatile gint16 *) (ptr));
2401 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2403 return *((volatile gint32 *) (ptr));
2407 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2409 return *((volatile gint64 *) (ptr));
2413 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2415 return (void *) *((volatile void **) ptr);
2419 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2421 return *((volatile double *) (ptr));
2425 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2427 return *((volatile float *) (ptr));
2431 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2433 *((volatile gint8 *) ptr) = value;
2437 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2439 *((volatile gint16 *) ptr) = value;
2443 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2445 *((volatile gint32 *) ptr) = value;
2449 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2451 *((volatile gint64 *) ptr) = value;
2455 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2457 *((volatile void **) ptr) = value;
2461 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2463 mono_gc_wbarrier_generic_store (ptr, value);
2467 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2469 *((volatile double *) ptr) = value;
2473 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2475 *((volatile float *) ptr) = value;
2478 void mono_thread_init (MonoThreadStartCB start_cb,
2479 MonoThreadAttachCB attach_cb)
2481 InitializeCriticalSection(&threads_mutex);
2482 InitializeCriticalSection(&interlocked_mutex);
2483 InitializeCriticalSection(&contexts_mutex);
2485 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2486 g_assert(background_change_event != NULL);
2488 mono_init_static_data_info (&thread_static_info);
2489 mono_init_static_data_info (&context_static_info);
2491 MONO_FAST_TLS_INIT (tls_current_object);
2492 mono_native_tls_alloc (¤t_object_key, NULL);
2493 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2495 mono_thread_start_cb = start_cb;
2496 mono_thread_attach_cb = attach_cb;
2498 /* Get a pseudo handle to the current process. This is just a
2499 * kludge so that wapi can build a process handle if needed.
2500 * As a pseudo handle is returned, we don't need to clean
2503 GetCurrentProcess ();
2506 void mono_thread_cleanup (void)
2508 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2509 /* The main thread must abandon any held mutexes (particularly
2510 * important for named mutexes as they are shared across
2511 * processes, see bug 74680.) This will happen when the
2512 * thread exits, but if it's not running in a subthread it
2513 * won't exit in time.
2515 /* Using non-w32 API is a nasty kludge, but I couldn't find
2516 * anything in the documentation that would let me do this
2517 * here yet still be safe to call on windows.
2519 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2523 /* This stuff needs more testing, it seems one of these
2524 * critical sections can be locked when mono_thread_cleanup is
2527 DeleteCriticalSection (&threads_mutex);
2528 DeleteCriticalSection (&interlocked_mutex);
2529 DeleteCriticalSection (&contexts_mutex);
2530 DeleteCriticalSection (&delayed_free_table_mutex);
2531 DeleteCriticalSection (&small_id_mutex);
2532 CloseHandle (background_change_event);
2535 mono_native_tls_free (current_object_key);
2539 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2541 mono_thread_cleanup_fn = func;
2545 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2547 thread->internal_thread->manage_callback = func;
2550 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2552 mono_thread_notify_pending_exc_fn = func;
2556 static void print_tids (gpointer key, gpointer value, gpointer user)
2558 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2559 * sizeof(uint) and a cast to uint would overflow
2561 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2562 * print this as a pointer.
2564 g_message ("Waiting for: %p", key);
2569 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2570 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2574 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2578 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2580 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2582 if(ret==WAIT_FAILED) {
2583 /* See the comment in build_wait_tids() */
2584 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2588 for(i=0; i<wait->num; i++)
2589 CloseHandle (wait->handles[i]);
2591 if (ret == WAIT_TIMEOUT)
2594 for(i=0; i<wait->num; i++) {
2595 gsize tid = wait->threads[i]->tid;
2597 mono_threads_lock ();
2598 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2599 /* This thread must have been killed, because
2600 * it hasn't cleaned itself up. (It's just
2601 * possible that the thread exited before the
2602 * parent thread had a chance to store the
2603 * handle, and now there is another pointer to
2604 * the already-exited thread stored. In this
2605 * case, we'll just get two
2606 * mono_profiler_thread_end() calls for the
2610 mono_threads_unlock ();
2611 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2612 thread_cleanup (wait->threads[i]);
2614 mono_threads_unlock ();
2619 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2621 guint32 i, ret, count;
2623 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2625 /* Add the thread state change event, so it wakes up if a thread changes
2626 * to background mode.
2629 if (count < MAXIMUM_WAIT_OBJECTS) {
2630 wait->handles [count] = background_change_event;
2634 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2636 if(ret==WAIT_FAILED) {
2637 /* See the comment in build_wait_tids() */
2638 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2642 for(i=0; i<wait->num; i++)
2643 CloseHandle (wait->handles[i]);
2645 if (ret == WAIT_TIMEOUT)
2648 if (ret < wait->num) {
2649 gsize tid = wait->threads[ret]->tid;
2650 mono_threads_lock ();
2651 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2652 /* See comment in wait_for_tids about thread cleanup */
2653 mono_threads_unlock ();
2654 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2655 thread_cleanup (wait->threads [ret]);
2657 mono_threads_unlock ();
2661 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2663 struct wait_data *wait=(struct wait_data *)user;
2665 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2667 MonoInternalThread *thread=(MonoInternalThread *)value;
2669 /* Ignore background threads, we abort them later */
2670 /* Do not lock here since it is not needed and the caller holds threads_lock */
2671 if (thread->state & ThreadState_Background) {
2672 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2673 return; /* just leave, ignore */
2676 if (mono_gc_is_finalizer_internal_thread (thread)) {
2677 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2681 if (thread == mono_thread_internal_current ()) {
2682 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2686 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2687 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2691 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2692 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2696 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2697 if (handle == NULL) {
2698 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2702 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2703 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2704 wait->handles[wait->num]=handle;
2705 wait->threads[wait->num]=thread;
2708 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2710 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2715 /* Just ignore the rest, we can't do anything with
2722 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2724 struct wait_data *wait=(struct wait_data *)user;
2725 gsize self = GetCurrentThreadId ();
2726 MonoInternalThread *thread = value;
2729 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2732 /* The finalizer thread is not a background thread */
2733 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2734 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2736 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2740 /* printf ("A: %d\n", wait->num); */
2741 wait->handles[wait->num]=thread->handle;
2742 wait->threads[wait->num]=thread;
2745 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2746 mono_thread_internal_stop (thread);
2750 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2754 * mono_threads_set_shutting_down:
2756 * Is called by a thread that wants to shut down Mono. If the runtime is already
2757 * shutting down, the calling thread is suspended/stopped, and this function never
2761 mono_threads_set_shutting_down (void)
2763 MonoInternalThread *current_thread = mono_thread_internal_current ();
2765 mono_threads_lock ();
2767 if (shutting_down) {
2768 mono_threads_unlock ();
2770 /* Make sure we're properly suspended/stopped */
2772 EnterCriticalSection (current_thread->synch_cs);
2774 if ((current_thread->state & ThreadState_SuspendRequested) ||
2775 (current_thread->state & ThreadState_AbortRequested) ||
2776 (current_thread->state & ThreadState_StopRequested)) {
2777 LeaveCriticalSection (current_thread->synch_cs);
2778 mono_thread_execute_interruption (current_thread);
2780 current_thread->state |= ThreadState_Stopped;
2781 LeaveCriticalSection (current_thread->synch_cs);
2784 /*since we're killing the thread, unset the current domain.*/
2785 mono_domain_unset ();
2787 /* Wake up other threads potentially waiting for us */
2790 shutting_down = TRUE;
2792 /* Not really a background state change, but this will
2793 * interrupt the main thread if it is waiting for all
2794 * the other threads.
2796 SetEvent (background_change_event);
2798 mono_threads_unlock ();
2803 * mono_threads_is_shutting_down:
2805 * Returns whether a thread has commenced shutdown of Mono. Note that
2806 * if the function returns FALSE the caller must not assume that
2807 * shutdown is not in progress, because the situation might have
2808 * changed since the function returned. For that reason this function
2809 * is of very limited utility.
2812 mono_threads_is_shutting_down (void)
2814 return shutting_down;
2817 void mono_thread_manage (void)
2819 struct wait_data wait_data;
2820 struct wait_data *wait = &wait_data;
2822 memset (wait, 0, sizeof (struct wait_data));
2823 /* join each thread that's still running */
2824 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2826 mono_threads_lock ();
2828 THREAD_DEBUG (g_message("%s: No threads", __func__));
2829 mono_threads_unlock ();
2832 mono_threads_unlock ();
2835 mono_threads_lock ();
2836 if (shutting_down) {
2837 /* somebody else is shutting down */
2838 mono_threads_unlock ();
2841 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2842 mono_g_hash_table_foreach (threads, print_tids, NULL));
2844 ResetEvent (background_change_event);
2846 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2847 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2848 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2849 mono_threads_unlock ();
2851 /* Something to wait for */
2852 wait_for_tids_or_state_change (wait, INFINITE);
2854 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2855 } while(wait->num>0);
2857 mono_threads_set_shutting_down ();
2859 /* No new threads will be created after this point */
2861 mono_runtime_set_shutting_down ();
2863 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2864 mono_thread_pool_cleanup ();
2867 * Remove everything but the finalizer thread and self.
2868 * Also abort all the background threads
2871 mono_threads_lock ();
2874 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2875 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2876 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2878 mono_threads_unlock ();
2880 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2882 /* Something to wait for */
2883 wait_for_tids (wait, INFINITE);
2885 } while (wait->num > 0);
2888 * give the subthreads a chance to really quit (this is mainly needed
2889 * to get correct user and system times from getrusage/wait/time(1)).
2890 * This could be removed if we avoid pthread_detach() and use pthread_join().
2897 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2899 MonoInternalThread *thread=(MonoInternalThread *)value;
2901 if(thread->tid != (gsize)user) {
2902 /*TerminateThread (thread->handle, -1);*/
2906 void mono_thread_abort_all_other_threads (void)
2908 gsize self = GetCurrentThreadId ();
2910 mono_threads_lock ();
2911 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2912 mono_g_hash_table_size (threads));
2913 mono_g_hash_table_foreach (threads, print_tids, NULL));
2915 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2917 mono_threads_unlock ();
2921 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2923 MonoInternalThread *thread = (MonoInternalThread*)value;
2924 struct wait_data *wait = (struct wait_data*)user_data;
2928 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2930 * This needs no locking.
2932 if ((thread->state & ThreadState_Suspended) != 0 ||
2933 (thread->state & ThreadState_Stopped) != 0)
2936 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2937 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2941 wait->handles [wait->num] = handle;
2942 wait->threads [wait->num] = thread;
2948 * mono_thread_suspend_all_other_threads:
2950 * Suspend all managed threads except the finalizer thread and this thread. It is
2951 * not possible to resume them later.
2953 void mono_thread_suspend_all_other_threads (void)
2955 struct wait_data wait_data;
2956 struct wait_data *wait = &wait_data;
2958 gsize self = GetCurrentThreadId ();
2960 guint32 eventidx = 0;
2961 gboolean starting, finished;
2963 memset (wait, 0, sizeof (struct wait_data));
2965 * The other threads could be in an arbitrary state at this point, i.e.
2966 * they could be starting up, shutting down etc. This means that there could be
2967 * threads which are not even in the threads hash table yet.
2971 * First we set a barrier which will be checked by all threads before they
2972 * are added to the threads hash table, and they will exit if the flag is set.
2973 * This ensures that no threads could be added to the hash later.
2974 * We will use shutting_down as the barrier for now.
2976 g_assert (shutting_down);
2979 * We make multiple calls to WaitForMultipleObjects since:
2980 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
2981 * - some threads could exit without becoming suspended
2986 * Make a copy of the hashtable since we can't do anything with
2987 * threads while threads_mutex is held.
2990 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2991 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2992 mono_threads_lock ();
2993 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
2994 mono_threads_unlock ();
2996 events = g_new0 (gpointer, wait->num);
2998 /* Get the suspended events that we'll be waiting for */
2999 for (i = 0; i < wait->num; ++i) {
3000 MonoInternalThread *thread = wait->threads [i];
3001 gboolean signal_suspend = FALSE;
3003 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3004 //CloseHandle (wait->handles [i]);
3005 wait->threads [i] = NULL; /* ignore this thread in next loop */
3009 ensure_synch_cs_set (thread);
3011 EnterCriticalSection (thread->synch_cs);
3013 if (thread->suspended_event == NULL) {
3014 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3015 if (thread->suspended_event == NULL) {
3016 /* Forget this one and go on to the next */
3017 LeaveCriticalSection (thread->synch_cs);
3022 if ((thread->state & ThreadState_Suspended) != 0 ||
3023 (thread->state & ThreadState_StopRequested) != 0 ||
3024 (thread->state & ThreadState_Stopped) != 0) {
3025 LeaveCriticalSection (thread->synch_cs);
3026 CloseHandle (wait->handles [i]);
3027 wait->threads [i] = NULL; /* ignore this thread in next loop */
3031 if ((thread->state & ThreadState_SuspendRequested) == 0)
3032 signal_suspend = TRUE;
3034 events [eventidx++] = thread->suspended_event;
3036 /* Convert abort requests into suspend requests */
3037 if ((thread->state & ThreadState_AbortRequested) != 0)
3038 thread->state &= ~ThreadState_AbortRequested;
3040 thread->state |= ThreadState_SuspendRequested;
3042 LeaveCriticalSection (thread->synch_cs);
3044 /* Signal the thread to suspend */
3045 if (mono_thread_info_new_interrupt_enabled ())
3046 suspend_thread_internal (thread, TRUE);
3047 else if (signal_suspend)
3048 signal_thread_state_change (thread);
3051 /*Only wait on the suspend event if we are using the old path */
3052 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3053 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3054 for (i = 0; i < wait->num; ++i) {
3055 MonoInternalThread *thread = wait->threads [i];
3060 ensure_synch_cs_set (thread);
3062 EnterCriticalSection (thread->synch_cs);
3063 if ((thread->state & ThreadState_Suspended) != 0) {
3064 CloseHandle (thread->suspended_event);
3065 thread->suspended_event = NULL;
3067 LeaveCriticalSection (thread->synch_cs);
3071 if (eventidx <= 0) {
3073 * If there are threads which are starting up, we wait until they
3074 * are suspended when they try to register in the threads hash.
3075 * This is guaranteed to finish, since the threads which can create new
3076 * threads get suspended after a while.
3077 * FIXME: The finalizer thread can still create new threads.
3079 mono_threads_lock ();
3080 if (threads_starting_up)
3081 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3084 mono_threads_unlock ();
3096 collect_threads (gpointer key, gpointer value, gpointer user_data)
3098 MonoInternalThread *thread = (MonoInternalThread*)value;
3099 struct wait_data *wait = (struct wait_data*)user_data;
3102 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3103 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3107 wait->handles [wait->num] = handle;
3108 wait->threads [wait->num] = thread;
3113 static gboolean thread_dump_requested;
3115 static G_GNUC_UNUSED gboolean
3116 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3118 GString *p = (GString*)data;
3119 MonoMethod *method = NULL;
3121 method = frame->ji->method;
3124 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3125 g_string_append_printf (p, " %s\n", location);
3128 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3134 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3136 GString* text = g_string_new (0);
3138 GError *error = NULL;
3141 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3143 g_string_append_printf (text, "\n\"%s\"", name);
3146 else if (thread->threadpool_thread)
3147 g_string_append (text, "\n\"<threadpool thread>\"");
3149 g_string_append (text, "\n\"<unnamed thread>\"");
3152 /* This no longer works with remote unwinding */
3154 wapi_desc = wapi_current_thread_desc ();
3155 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3160 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3161 mono_thread_info_resume (mono_thread_info_get_tid (info));
3163 fprintf (stdout, "%s", text->str);
3165 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3166 OutputDebugStringA(text->str);
3169 g_string_free (text, TRUE);
3174 dump_thread (gpointer key, gpointer value, gpointer user)
3176 MonoInternalThread *thread = (MonoInternalThread *)value;
3177 MonoThreadInfo *info;
3179 if (thread == mono_thread_internal_current ())
3183 FIXME This still can hang if we stop a thread during malloc.
3184 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3185 that takes a callback and runs it with the target suspended.
3186 We probably should loop a bit around trying to get it to either managed code
3189 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3194 print_thread_dump (thread, info);
3198 mono_threads_perform_thread_dump (void)
3200 if (!thread_dump_requested)
3203 printf ("Full thread dump:\n");
3206 * Make a copy of the hashtable since we can't do anything with
3207 * threads while threads_mutex is held.
3209 mono_threads_lock ();
3210 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3211 mono_threads_unlock ();
3213 thread_dump_requested = FALSE;
3217 * mono_threads_request_thread_dump:
3219 * Ask all threads except the current to print their stacktrace to stdout.
3222 mono_threads_request_thread_dump (void)
3224 struct wait_data wait_data;
3225 struct wait_data *wait = &wait_data;
3228 /*The new thread dump code runs out of the finalizer thread. */
3229 if (mono_thread_info_new_interrupt_enabled ()) {
3230 thread_dump_requested = TRUE;
3231 mono_gc_finalize_notify ();
3236 memset (wait, 0, sizeof (struct wait_data));
3239 * Make a copy of the hashtable since we can't do anything with
3240 * threads while threads_mutex is held.
3242 mono_threads_lock ();
3243 mono_g_hash_table_foreach (threads, collect_threads, wait);
3244 mono_threads_unlock ();
3246 for (i = 0; i < wait->num; ++i) {
3247 MonoInternalThread *thread = wait->threads [i];
3249 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3250 (thread != mono_thread_internal_current ()) &&
3251 !thread->thread_dump_requested) {
3252 thread->thread_dump_requested = TRUE;
3254 signal_thread_state_change (thread);
3257 CloseHandle (wait->handles [i]);
3263 gint allocated; /* +1 so that refs [allocated] == NULL */
3267 typedef struct ref_stack RefStack;
3270 ref_stack_new (gint initial_size)
3274 initial_size = MAX (initial_size, 16) + 1;
3275 rs = g_new0 (RefStack, 1);
3276 rs->refs = g_new0 (gpointer, initial_size);
3277 rs->allocated = initial_size;
3282 ref_stack_destroy (gpointer ptr)
3293 ref_stack_push (RefStack *rs, gpointer ptr)
3295 g_assert (rs != NULL);
3297 if (rs->bottom >= rs->allocated) {
3298 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3299 rs->allocated <<= 1;
3300 rs->refs [rs->allocated] = NULL;
3302 rs->refs [rs->bottom++] = ptr;
3306 ref_stack_pop (RefStack *rs)
3308 if (rs == NULL || rs->bottom == 0)
3312 rs->refs [rs->bottom] = NULL;
3316 ref_stack_find (RefStack *rs, gpointer ptr)
3323 for (refs = rs->refs; refs && *refs; refs++) {
3331 * mono_thread_push_appdomain_ref:
3333 * Register that the current thread may have references to objects in domain
3334 * @domain on its stack. Each call to this function should be paired with a
3335 * call to pop_appdomain_ref.
3338 mono_thread_push_appdomain_ref (MonoDomain *domain)
3340 MonoInternalThread *thread = mono_thread_internal_current ();
3343 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3344 SPIN_LOCK (thread->lock_thread_id);
3345 if (thread->appdomain_refs == NULL)
3346 thread->appdomain_refs = ref_stack_new (16);
3347 ref_stack_push (thread->appdomain_refs, domain);
3348 SPIN_UNLOCK (thread->lock_thread_id);
3353 mono_thread_pop_appdomain_ref (void)
3355 MonoInternalThread *thread = mono_thread_internal_current ();
3358 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3359 SPIN_LOCK (thread->lock_thread_id);
3360 ref_stack_pop (thread->appdomain_refs);
3361 SPIN_UNLOCK (thread->lock_thread_id);
3366 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3369 SPIN_LOCK (thread->lock_thread_id);
3370 res = ref_stack_find (thread->appdomain_refs, domain);
3371 SPIN_UNLOCK (thread->lock_thread_id);
3376 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3378 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3381 typedef struct abort_appdomain_data {
3382 struct wait_data wait;
3384 } abort_appdomain_data;
3387 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3389 MonoInternalThread *thread = (MonoInternalThread*)value;
3390 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3391 MonoDomain *domain = data->domain;
3393 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3394 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3396 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3397 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3400 data->wait.handles [data->wait.num] = handle;
3401 data->wait.threads [data->wait.num] = thread;
3404 /* Just ignore the rest, we can't do anything with
3412 * mono_threads_abort_appdomain_threads:
3414 * Abort threads which has references to the given appdomain.
3417 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3419 abort_appdomain_data user_data;
3421 int orig_timeout = timeout;
3424 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3426 start_time = mono_msec_ticks ();
3428 mono_threads_lock ();
3430 user_data.domain = domain;
3431 user_data.wait.num = 0;
3432 /* This shouldn't take any locks */
3433 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3434 mono_threads_unlock ();
3436 if (user_data.wait.num > 0) {
3437 /* Abort the threads outside the threads lock */
3438 for (i = 0; i < user_data.wait.num; ++i)
3439 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3442 * We should wait for the threads either to abort, or to leave the
3443 * domain. We can't do the latter, so we wait with a timeout.
3445 wait_for_tids (&user_data.wait, 100);
3448 /* Update remaining time */
3449 timeout -= mono_msec_ticks () - start_time;
3450 start_time = mono_msec_ticks ();
3452 if (orig_timeout != -1 && timeout < 0)
3455 while (user_data.wait.num > 0);
3457 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3463 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3465 MonoInternalThread *thread = (MonoInternalThread*)value;
3466 MonoDomain *domain = (MonoDomain*)user_data;
3469 /* No locking needed here */
3470 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3472 if (thread->cached_culture_info) {
3473 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3474 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3475 if (obj && obj->vtable->domain == domain)
3476 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3482 * mono_threads_clear_cached_culture:
3484 * Clear the cached_current_culture from all threads if it is in the
3488 mono_threads_clear_cached_culture (MonoDomain *domain)
3490 mono_threads_lock ();
3491 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3492 mono_threads_unlock ();
3496 * mono_thread_get_undeniable_exception:
3498 * Return an exception which needs to be raised when leaving a catch clause.
3499 * This is used for undeniable exception propagation.
3502 mono_thread_get_undeniable_exception (void)
3504 MonoInternalThread *thread = mono_thread_internal_current ();
3506 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3508 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3509 * exception if the thread no longer references a dying appdomain.
3511 thread->abort_exc->trace_ips = NULL;
3512 thread->abort_exc->stack_trace = NULL;
3513 return thread->abort_exc;
3519 #if MONO_SMALL_CONFIG
3520 #define NUM_STATIC_DATA_IDX 4
3521 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3525 #define NUM_STATIC_DATA_IDX 8
3526 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3527 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3531 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3534 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3537 gpointer *static_data = addr;
3538 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3541 if (!static_data [i])
3543 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3544 ptr = static_data [i];
3545 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3546 uintptr_t bmap = static_reference_bitmaps [i][j];
3549 if ((bmap & 1) && *p) {
3560 * mono_alloc_static_data
3562 * Allocate memory blocks for storing threads or context static data
3565 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3567 guint idx = (offset >> 24) - 1;
3570 gpointer* static_data = *static_data_ptr;
3572 static void* tls_desc = NULL;
3573 if (mono_gc_user_markers_supported () && !tls_desc)
3574 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3575 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3576 *static_data_ptr = static_data;
3577 static_data [0] = static_data;
3580 for (i = 1; i <= idx; ++i) {
3581 if (static_data [i])
3583 if (mono_gc_user_markers_supported () && threadlocal)
3584 static_data [i] = g_malloc0 (static_data_size [i]);
3586 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3591 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3594 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3595 if (!static_data [i])
3597 if (mono_gc_user_markers_supported () && threadlocal)
3598 g_free (static_data [i]);
3600 mono_gc_free_fixed (static_data [i]);
3602 mono_gc_free_fixed (static_data);
3606 * mono_init_static_data_info
3608 * Initializes static data counters
3610 static void mono_init_static_data_info (StaticDataInfo *static_data)
3612 static_data->idx = 0;
3613 static_data->offset = 0;
3614 static_data->freelist = NULL;
3618 * mono_alloc_static_data_slot
3620 * Generates an offset for static data. static_data contains the counters
3621 * used to generate it.
3624 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3628 if (!static_data->idx && !static_data->offset) {
3630 * we use the first chunk of the first allocation also as
3631 * an array for the rest of the data
3633 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3635 static_data->offset += align - 1;
3636 static_data->offset &= ~(align - 1);
3637 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3638 static_data->idx ++;
3639 g_assert (size <= static_data_size [static_data->idx]);
3640 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3641 static_data->offset = 0;
3643 offset = static_data->offset | ((static_data->idx + 1) << 24);
3644 static_data->offset += size;
3649 * ensure thread static fields already allocated are valid for thread
3650 * This function is called when a thread is created or on thread attach.
3653 thread_adjust_static_data (MonoInternalThread *thread)
3657 mono_threads_lock ();
3658 if (thread_static_info.offset || thread_static_info.idx > 0) {
3659 /* get the current allocated size */
3660 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3661 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3663 mono_threads_unlock ();
3667 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3669 MonoInternalThread *thread = value;
3670 guint32 offset = GPOINTER_TO_UINT (user);
3672 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3675 static MonoThreadDomainTls*
3676 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3678 MonoThreadDomainTls* prev = NULL;
3679 MonoThreadDomainTls* tmp = static_data->freelist;
3681 if (tmp->size == size) {
3683 prev->next = tmp->next;
3685 static_data->freelist = tmp->next;
3694 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3697 int idx = (offset >> 24) - 1;
3699 if (!static_reference_bitmaps [idx])
3700 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3701 rb = static_reference_bitmaps [idx];
3703 offset /= sizeof (gpointer);
3704 /* offset is now the bitmap offset */
3705 for (i = 0; i < numbits; ++i) {
3706 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3707 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3712 clear_reference_bitmap (guint32 offset, guint32 size)
3714 int idx = (offset >> 24) - 1;
3716 rb = static_reference_bitmaps [idx];
3718 offset /= sizeof (gpointer);
3719 size /= sizeof (gpointer);
3721 /* offset is now the bitmap offset */
3722 for (; offset < size; ++offset)
3723 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3727 * The offset for a special static variable is composed of three parts:
3728 * a bit that indicates the type of static data (0:thread, 1:context),
3729 * an index in the array of chunks of memory for the thread (thread->static_data)
3730 * and an offset in that chunk of mem. This allows allocating less memory in the
3735 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3738 if (static_type == SPECIAL_STATIC_THREAD) {
3739 MonoThreadDomainTls *item;
3740 mono_threads_lock ();
3741 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3742 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3744 offset = item->offset;
3747 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3749 update_tls_reference_bitmap (offset, bitmap, numbits);
3750 /* This can be called during startup */
3751 if (threads != NULL)
3752 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3753 mono_threads_unlock ();
3755 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3756 mono_contexts_lock ();
3757 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3758 mono_contexts_unlock ();
3759 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3765 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3767 /* The high bit means either thread (0) or static (1) data. */
3769 guint32 static_type = (offset & 0x80000000);
3772 offset &= 0x7fffffff;
3773 idx = (offset >> 24) - 1;
3775 if (static_type == 0) {
3776 return get_thread_static_data (thread, offset);
3778 /* Allocate static data block under demand, since we don't have a list
3781 MonoAppContext *context = mono_context_get ();
3782 if (!context->static_data || !context->static_data [idx]) {
3783 mono_contexts_lock ();
3784 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3785 mono_contexts_unlock ();
3787 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3792 mono_get_special_static_data (guint32 offset)
3794 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3803 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3805 MonoInternalThread *thread = value;
3806 TlsOffsetSize *data = user;
3807 int idx = (data->offset >> 24) - 1;
3810 if (!thread->static_data || !thread->static_data [idx])
3812 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3813 mono_gc_bzero (ptr, data->size);
3817 do_free_special_slot (guint32 offset, guint32 size)
3819 guint32 static_type = (offset & 0x80000000);
3820 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3821 if (static_type == 0) {
3823 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3824 data.offset = offset & 0x7fffffff;
3826 clear_reference_bitmap (data.offset, data.size);
3827 if (threads != NULL)
3828 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3829 item->offset = offset;
3832 if (!mono_runtime_is_shutting_down ()) {
3833 item->next = thread_static_info.freelist;
3834 thread_static_info.freelist = item;
3836 /* We could be called during shutdown after mono_thread_cleanup () is called */
3840 /* FIXME: free context static data as well */
3845 do_free_special (gpointer key, gpointer value, gpointer data)
3847 MonoClassField *field = key;
3848 guint32 offset = GPOINTER_TO_UINT (value);
3851 size = mono_type_size (field->type, &align);
3852 do_free_special_slot (offset, size);
3856 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3858 mono_threads_lock ();
3859 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3860 mono_threads_unlock ();
3864 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3866 mono_threads_lock ();
3867 do_free_special_slot (offset, size);
3868 mono_threads_unlock ();
3872 * allocates room in the thread local area for storing an instance of the struct type
3873 * the allocation is kept track of in domain->tlsrec_list.
3876 mono_thread_alloc_tls (MonoReflectionType *type)
3878 MonoDomain *domain = mono_domain_get ();
3880 MonoTlsDataRecord *tlsrec;
3883 gsize default_bitmap [4] = {0};
3884 uint32_t tls_offset;
3888 klass = mono_class_from_mono_type (type->type);
3889 /* TlsDatum is a struct, so we subtract the object header size offset */
3890 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3891 size = mono_type_size (type->type, &align);
3892 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3893 if (bitmap != default_bitmap)
3895 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3896 tlsrec->tls_offset = tls_offset;
3897 tlsrec->size = size;
3898 mono_domain_lock (domain);
3899 tlsrec->next = domain->tlsrec_list;
3900 domain->tlsrec_list = tlsrec;
3901 mono_domain_unlock (domain);
3906 mono_thread_destroy_tls (uint32_t tls_offset)
3908 MonoTlsDataRecord *prev = NULL;
3909 MonoTlsDataRecord *cur;
3911 MonoDomain *domain = mono_domain_get ();
3912 mono_domain_lock (domain);
3913 cur = domain->tlsrec_list;
3915 if (cur->tls_offset == tls_offset) {
3917 prev->next = cur->next;
3919 domain->tlsrec_list = cur->next;
3927 mono_domain_unlock (domain);
3929 mono_special_static_data_free_slot (tls_offset, size);
3933 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3936 mono_thread_destroy_domain_tls (MonoDomain *domain)
3938 while (domain->tlsrec_list)
3939 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3942 static MonoClassField *local_slots = NULL;
3945 /* local tls data to get locals_slot from a thread */
3948 /* index in the locals_slot array */
3953 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3955 LocalSlotID *sid = user_data;
3956 MonoInternalThread *thread = (MonoInternalThread*)value;
3957 MonoArray *slots_array;
3959 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3960 * it is for the right domain, so we need to check if it is allocated an initialized
3961 * for the current thread.
3963 /*g_print ("handling thread %p\n", thread);*/
3964 if (!thread->static_data || !thread->static_data [sid->idx])
3966 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3967 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3969 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3973 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3981 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3983 g_warning ("local_slots field not found in Thread class");
3987 domain = mono_domain_get ();
3988 mono_domain_lock (domain);
3989 if (domain->special_static_fields)
3990 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3991 mono_domain_unlock (domain);
3994 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3995 sid.offset = GPOINTER_TO_UINT (addr);
3996 sid.offset &= 0x7fffffff;
3997 sid.idx = (sid.offset >> 24) - 1;
3998 mono_threads_lock ();
3999 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4000 mono_threads_unlock ();
4002 /* FIXME: clear the slot for MonoAppContexts, too */
4007 static void CALLBACK dummy_apc (ULONG_PTR param)
4011 static guint32 dummy_apc (gpointer param)
4018 * mono_thread_execute_interruption
4020 * Performs the operation that the requested thread state requires (abort,
4023 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4025 ensure_synch_cs_set (thread);
4027 EnterCriticalSection (thread->synch_cs);
4029 /* MonoThread::interruption_requested can only be changed with atomics */
4030 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4031 /* this will consume pending APC calls */
4032 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4033 InterlockedDecrement (&thread_interruption_requested);
4035 /* Clear the interrupted flag of the thread so it can wait again */
4036 wapi_clear_interruption ();
4040 if ((thread->state & ThreadState_AbortRequested) != 0) {
4041 LeaveCriticalSection (thread->synch_cs);
4042 if (thread->abort_exc == NULL) {
4044 * This might be racy, but it has to be called outside the lock
4045 * since it calls managed code.
4047 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4049 return thread->abort_exc;
4051 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4052 self_suspend_internal (thread);
4055 else if ((thread->state & ThreadState_StopRequested) != 0) {
4056 /* FIXME: do this through the JIT? */
4058 LeaveCriticalSection (thread->synch_cs);
4060 mono_thread_exit ();
4062 } else if (thread->pending_exception) {
4065 exc = thread->pending_exception;
4066 thread->pending_exception = NULL;
4068 LeaveCriticalSection (thread->synch_cs);
4070 } else if (thread->thread_interrupt_requested) {
4072 thread->thread_interrupt_requested = FALSE;
4073 LeaveCriticalSection (thread->synch_cs);
4075 return(mono_get_exception_thread_interrupted ());
4078 LeaveCriticalSection (thread->synch_cs);
4084 * mono_thread_request_interruption
4086 * A signal handler can call this method to request the interruption of a
4087 * thread. The result of the interruption will depend on the current state of
4088 * the thread. If the result is an exception that needs to be throw, it is
4089 * provided as return value.
4092 mono_thread_request_interruption (gboolean running_managed)
4094 MonoInternalThread *thread = mono_thread_internal_current ();
4096 /* The thread may already be stopping */
4101 if (thread->interrupt_on_stop &&
4102 thread->state & ThreadState_StopRequested &&
4103 thread->state & ThreadState_Background)
4107 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4109 InterlockedIncrement (&thread_interruption_requested);
4111 if (!running_managed || is_running_protected_wrapper ()) {
4112 /* Can't stop while in unmanaged code. Increase the global interruption
4113 request count. When exiting the unmanaged method the count will be
4114 checked and the thread will be interrupted. */
4117 if (mono_thread_notify_pending_exc_fn && !running_managed)
4118 /* The JIT will notify the thread about the interruption */
4119 /* This shouldn't take any locks */
4120 mono_thread_notify_pending_exc_fn ();
4122 /* this will awake the thread if it is in WaitForSingleObject
4124 /* Our implementation of this function ignores the func argument */
4125 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4129 return mono_thread_execute_interruption (thread);
4133 /*This function should be called by a thread after it has exited all of
4134 * its handle blocks at interruption time.*/
4136 mono_thread_resume_interruption (void)
4138 MonoInternalThread *thread = mono_thread_internal_current ();
4139 gboolean still_aborting;
4141 /* The thread may already be stopping */
4145 ensure_synch_cs_set (thread);
4146 EnterCriticalSection (thread->synch_cs);
4147 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4148 LeaveCriticalSection (thread->synch_cs);
4150 /*This can happen if the protected block called Thread::ResetAbort*/
4151 if (!still_aborting)
4154 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4156 InterlockedIncrement (&thread_interruption_requested);
4159 wapi_self_interrupt ();
4161 return mono_thread_execute_interruption (thread);
4164 gboolean mono_thread_interruption_requested ()
4166 if (thread_interruption_requested) {
4167 MonoInternalThread *thread = mono_thread_internal_current ();
4168 /* The thread may already be stopping */
4170 return (thread->interruption_requested);
4175 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4177 MonoInternalThread *thread = mono_thread_internal_current ();
4179 /* The thread may already be stopping */
4183 mono_debugger_check_interruption ();
4185 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4186 MonoException* exc = mono_thread_execute_interruption (thread);
4187 if (exc) mono_raise_exception (exc);
4192 * Performs the interruption of the current thread, if one has been requested,
4193 * and the thread is not running a protected wrapper.
4195 void mono_thread_interruption_checkpoint ()
4197 mono_thread_interruption_checkpoint_request (FALSE);
4201 * Performs the interruption of the current thread, if one has been requested.
4203 void mono_thread_force_interruption_checkpoint ()
4205 mono_thread_interruption_checkpoint_request (TRUE);
4209 * mono_thread_get_and_clear_pending_exception:
4211 * Return any pending exceptions for the current thread and clear it as a side effect.
4214 mono_thread_get_and_clear_pending_exception (void)
4216 MonoInternalThread *thread = mono_thread_internal_current ();
4218 /* The thread may already be stopping */
4222 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4223 return mono_thread_execute_interruption (thread);
4226 if (thread->pending_exception) {
4227 MonoException *exc = thread->pending_exception;
4229 thread->pending_exception = NULL;
4237 * mono_set_pending_exception:
4239 * Set the pending exception of the current thread to EXC.
4240 * The exception will be thrown when execution returns to managed code.
4243 mono_set_pending_exception (MonoException *exc)
4245 MonoInternalThread *thread = mono_thread_internal_current ();
4247 /* The thread may already be stopping */
4251 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4253 mono_thread_request_interruption (FALSE);
4257 * mono_thread_interruption_request_flag:
4259 * Returns the address of a flag that will be non-zero if an interruption has
4260 * been requested for a thread. The thread to interrupt may not be the current
4261 * thread, so an additional call to mono_thread_interruption_requested() or
4262 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4265 gint32* mono_thread_interruption_request_flag ()
4267 return &thread_interruption_requested;
4271 mono_thread_init_apartment_state (void)
4274 MonoInternalThread* thread = mono_thread_internal_current ();
4276 /* Positive return value indicates success, either
4277 * S_OK if this is first CoInitialize call, or
4278 * S_FALSE if CoInitialize already called, but with same
4279 * threading model. A negative value indicates failure,
4280 * probably due to trying to change the threading model.
4282 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4283 ? COINIT_APARTMENTTHREADED
4284 : COINIT_MULTITHREADED) < 0) {
4285 thread->apartment_state = ThreadApartmentState_Unknown;
4291 mono_thread_cleanup_apartment_state (void)
4294 MonoInternalThread* thread = mono_thread_internal_current ();
4296 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4303 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4305 ensure_synch_cs_set (thread);
4307 EnterCriticalSection (thread->synch_cs);
4308 thread->state |= state;
4309 LeaveCriticalSection (thread->synch_cs);
4313 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4315 ensure_synch_cs_set (thread);
4317 EnterCriticalSection (thread->synch_cs);
4318 thread->state &= ~state;
4319 LeaveCriticalSection (thread->synch_cs);
4323 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4325 gboolean ret = FALSE;
4327 ensure_synch_cs_set (thread);
4329 EnterCriticalSection (thread->synch_cs);
4331 if ((thread->state & test) != 0) {
4335 LeaveCriticalSection (thread->synch_cs);
4340 //static MonoClassField *execution_context_field;
4343 get_execution_context_addr (void)
4345 MonoDomain *domain = mono_domain_get ();
4346 guint32 offset = domain->execution_context_field_offset;
4349 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4352 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4354 mono_domain_lock (domain);
4355 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4356 mono_domain_unlock (domain);
4359 domain->execution_context_field_offset = offset;
4362 return (MonoObject**) mono_get_special_static_data (offset);
4366 mono_thread_get_execution_context (void)
4368 return *get_execution_context_addr ();
4372 mono_thread_set_execution_context (MonoObject *ec)
4374 *get_execution_context_addr () = ec;
4377 static gboolean has_tls_get = FALSE;
4380 mono_runtime_set_has_tls_get (gboolean val)
4386 mono_runtime_has_tls_get (void)
4392 mono_thread_kill (MonoInternalThread *thread, int signal)
4395 /* Win32 uses QueueUserAPC and callers of this are guarded */
4396 g_assert_not_reached ();
4398 # ifdef PTHREAD_POINTER_ID
4399 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4401 # ifdef PLATFORM_ANDROID
4402 if (thread->android_tid != 0) {
4404 int old_errno = errno;
4406 ret = tkill ((pid_t) thread->android_tid, signal);
4415 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4417 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4424 self_interrupt_thread (void *_unused)
4426 MonoThreadInfo *info = mono_thread_info_current ();
4427 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4428 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4429 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4430 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4434 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4438 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4442 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4444 MonoJitInfo **dest = data;
4450 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4452 MonoJitInfo *ji = NULL;
4453 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4458 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4461 MonoThreadInfo *info = NULL;
4462 gboolean protected_wrapper;
4463 gboolean running_managed;
4465 if (!mono_thread_info_new_interrupt_enabled ()) {
4466 signal_thread_state_change (thread);
4471 FIXME this is insanely broken, it doesn't cause interruption to happen
4472 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4474 if (thread == mono_thread_internal_current ()) {
4475 /* Do it synchronously */
4476 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4478 mono_raise_exception (exc);
4480 wapi_interrupt_thread (thread->handle);
4485 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4486 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4490 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4491 mono_thread_info_resume (mono_thread_info_get_tid (info));
4495 /*someone is already interrupting it*/
4496 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4497 mono_thread_info_resume (mono_thread_info_get_tid (info));
4500 InterlockedIncrement (&thread_interruption_requested);
4502 ji = mono_thread_info_get_last_managed (info);
4503 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4504 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4506 if (!protected_wrapper && running_managed) {
4507 /*We are in managed code*/
4508 /*Set the thread to call */
4509 if (install_async_abort)
4510 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4511 mono_thread_info_resume (mono_thread_info_get_tid (info));
4513 gpointer interrupt_handle;
4515 * This will cause waits to be broken.
4516 * It will also prevent the thread from entering a wait, so if the thread returns
4517 * from the wait before it receives the abort signal, it will just spin in the wait
4518 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4522 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4524 mono_thread_info_resume (mono_thread_info_get_tid (info));
4526 wapi_finish_interrupt_thread (interrupt_handle);
4529 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4533 transition_to_suspended (MonoInternalThread *thread)
4535 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4536 g_assert (0); /*FIXME we should not reach this */
4537 /*Make sure we balance the suspend count.*/
4538 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4540 thread->state &= ~ThreadState_SuspendRequested;
4541 thread->state |= ThreadState_Suspended;
4543 LeaveCriticalSection (thread->synch_cs);
4547 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4549 if (!mono_thread_info_new_interrupt_enabled ()) {
4550 signal_thread_state_change (thread);
4554 EnterCriticalSection (thread->synch_cs);
4555 if (thread == mono_thread_internal_current ()) {
4556 transition_to_suspended (thread);
4557 mono_thread_info_self_suspend ();
4559 MonoThreadInfo *info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt);
4560 MonoJitInfo *ji = mono_thread_info_get_last_managed (info);
4561 gboolean protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4562 gboolean running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4564 if (running_managed && !protected_wrapper) {
4565 transition_to_suspended (thread);
4567 gpointer interrupt_handle;
4569 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4570 InterlockedIncrement (&thread_interruption_requested);
4573 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4575 mono_thread_info_resume (mono_thread_info_get_tid (info));
4578 wapi_finish_interrupt_thread (interrupt_handle);
4580 LeaveCriticalSection (thread->synch_cs);
4585 /*This is called with @thread synch_cs held and it must release it*/
4587 self_suspend_internal (MonoInternalThread *thread)
4589 if (!mono_thread_info_new_interrupt_enabled ()) {
4590 thread->state &= ~ThreadState_SuspendRequested;
4591 thread->state |= ThreadState_Suspended;
4592 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4593 if (thread->suspend_event == NULL) {
4594 LeaveCriticalSection (thread->synch_cs);
4597 if (thread->suspended_event)
4598 SetEvent (thread->suspended_event);
4600 LeaveCriticalSection (thread->synch_cs);
4602 if (shutting_down) {
4603 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4608 WaitForSingleObject (thread->suspend_event, INFINITE);
4610 EnterCriticalSection (thread->synch_cs);
4612 CloseHandle (thread->suspend_event);
4613 thread->suspend_event = NULL;
4614 thread->state &= ~ThreadState_Suspended;
4616 /* The thread that requested the resume will have replaced this event
4617 * and will be waiting for it
4619 SetEvent (thread->resume_event);
4621 LeaveCriticalSection (thread->synch_cs);
4625 transition_to_suspended (thread);
4626 mono_thread_info_self_suspend ();
4629 /*This is called with @thread synch_cs held and it must release it*/
4631 resume_thread_internal (MonoInternalThread *thread)
4633 if (!mono_thread_info_new_interrupt_enabled ()) {
4634 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4635 if (thread->resume_event == NULL) {
4636 LeaveCriticalSection (thread->synch_cs);
4640 /* Awake the thread */
4641 SetEvent (thread->suspend_event);
4643 LeaveCriticalSection (thread->synch_cs);
4645 /* Wait for the thread to awake */
4646 WaitForSingleObject (thread->resume_event, INFINITE);
4647 CloseHandle (thread->resume_event);
4648 thread->resume_event = NULL;
4652 LeaveCriticalSection (thread->synch_cs);
4653 /* Awake the thread */
4654 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4656 EnterCriticalSection (thread->synch_cs);
4657 thread->state &= ~ThreadState_Suspended;
4658 LeaveCriticalSection (thread->synch_cs);