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)
19 #if defined(__OpenBSD__)
21 #include <pthread_np.h>
24 #include <mono/metadata/object.h>
25 #include <mono/metadata/domain-internals.h>
26 #include <mono/metadata/profiler-private.h>
27 #include <mono/metadata/threads.h>
28 #include <mono/metadata/threadpool.h>
29 #include <mono/metadata/threads-types.h>
30 #include <mono/metadata/exception.h>
31 #include <mono/metadata/environment.h>
32 #include <mono/metadata/monitor.h>
33 #include <mono/metadata/gc-internal.h>
34 #include <mono/metadata/marshal.h>
35 #include <mono/io-layer/io-layer.h>
37 #include <mono/io-layer/threads.h>
39 #include <mono/metadata/object-internals.h>
40 #include <mono/metadata/mono-debug-debugger.h>
41 #include <mono/utils/mono-compiler.h>
42 #include <mono/utils/mono-mmap.h>
43 #include <mono/utils/mono-membar.h>
44 #include <mono/utils/mono-time.h>
45 #include <mono/utils/mono-threads.h>
46 #include <mono/utils/hazard-pointer.h>
48 #include <mono/metadata/gc-internal.h>
50 #ifdef PLATFORM_ANDROID
53 extern int tkill (pid_t tid, int signal);
56 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
57 #define THREAD_DEBUG(a)
58 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
59 #define THREAD_WAIT_DEBUG(a)
60 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
61 #define LIBGC_DEBUG(a)
63 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
64 #define SPIN_LOCK(i) do { \
65 if (SPIN_TRYLOCK (i)) \
69 #define SPIN_UNLOCK(i) i = 0
71 /* Provide this for systems with glib < 2.6 */
72 #ifndef G_GSIZE_FORMAT
73 # if GLIB_SIZEOF_LONG == 8
74 # define G_GSIZE_FORMAT "lu"
76 # define G_GSIZE_FORMAT "u"
82 guint32 (*func)(void *);
98 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
99 struct _MonoThreadDomainTls {
100 MonoThreadDomainTls *next;
108 MonoThreadDomainTls *freelist;
111 /* Number of cached culture objects in the MonoThread->cached_culture_info array
112 * (per-type): we use the first NUM entries for CultureInfo and the last for
113 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
115 #define NUM_CACHED_CULTURES 4
116 #define CULTURES_START_IDX 0
117 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
119 /* Controls access to the 'threads' hash table */
120 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
121 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
122 static CRITICAL_SECTION threads_mutex;
124 /* Controls access to context static data */
125 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
126 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
127 static CRITICAL_SECTION contexts_mutex;
129 /* Holds current status of static data heap */
130 static StaticDataInfo thread_static_info;
131 static StaticDataInfo context_static_info;
133 /* The hash of existing threads (key is thread ID, value is
134 * MonoInternalThread*) that need joining before exit
136 static MonoGHashTable *threads=NULL;
139 * Threads which are starting up and they are not in the 'threads' hash yet.
140 * When handle_store is called for a thread, it will be removed from this hash table.
141 * Protected by mono_threads_lock ().
143 static MonoGHashTable *threads_starting_up = NULL;
145 /* Maps a MonoThread to its start argument */
146 /* Protected by mono_threads_lock () */
147 static MonoGHashTable *thread_start_args = NULL;
149 /* The TLS key that holds the MonoObject assigned to each thread */
150 static guint32 current_object_key = -1;
152 #ifdef MONO_HAVE_FAST_TLS
153 /* we need to use both the Tls* functions and __thread because
154 * the gc needs to see all the threads
156 MONO_FAST_TLS_DECLARE(tls_current_object);
157 #define SET_CURRENT_OBJECT(x) do { \
158 MONO_FAST_TLS_SET (tls_current_object, x); \
159 TlsSetValue (current_object_key, x); \
161 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
163 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x)
164 #define GET_CURRENT_OBJECT() (MonoInternalThread*) TlsGetValue (current_object_key)
167 /* function called at thread start */
168 static MonoThreadStartCB mono_thread_start_cb = NULL;
170 /* function called at thread attach */
171 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
173 /* function called at thread cleanup */
174 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
176 /* function called to notify the runtime about a pending exception on the current thread */
177 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
179 /* The default stack size for each thread */
180 static guint32 default_stacksize = 0;
181 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
183 static void thread_adjust_static_data (MonoInternalThread *thread);
184 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
185 static void mono_init_static_data_info (StaticDataInfo *static_data);
186 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
187 static gboolean mono_thread_resume (MonoInternalThread* thread);
188 static void mono_thread_start (MonoThread *thread);
189 static void signal_thread_state_change (MonoInternalThread *thread);
191 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
192 static void ref_stack_destroy (gpointer rs);
194 /* Spin lock for InterlockedXXX 64 bit functions */
195 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
196 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
197 static CRITICAL_SECTION interlocked_mutex;
199 /* global count of thread interruptions requested */
200 static gint32 thread_interruption_requested = 0;
202 /* Event signaled when a thread changes its background mode */
203 static HANDLE background_change_event;
205 static gboolean shutting_down = FALSE;
208 mono_thread_get_tls_key (void)
210 return current_object_key;
214 mono_thread_get_tls_offset (void)
217 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
221 /* handle_store() and handle_remove() manage the array of threads that
222 * still need to be waited for when the main thread exits.
224 * If handle_store() returns FALSE the thread must not be started
225 * because Mono is shutting down.
227 static gboolean handle_store(MonoThread *thread)
229 mono_threads_lock ();
231 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
233 if (threads_starting_up)
234 mono_g_hash_table_remove (threads_starting_up, thread);
237 mono_threads_unlock ();
242 MONO_GC_REGISTER_ROOT_FIXED (threads);
243 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
246 /* We don't need to duplicate thread->handle, because it is
247 * only closed when the thread object is finalized by the GC.
249 g_assert (thread->internal_thread);
250 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
251 thread->internal_thread);
253 mono_threads_unlock ();
258 static gboolean handle_remove(MonoInternalThread *thread)
261 gsize tid = thread->tid;
263 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
265 mono_threads_lock ();
268 /* We have to check whether the thread object for the
269 * tid is still the same in the table because the
270 * thread might have been destroyed and the tid reused
271 * in the meantime, in which case the tid would be in
272 * the table, but with another thread object.
274 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
275 mono_g_hash_table_remove (threads, (gpointer)tid);
284 mono_threads_unlock ();
286 /* Don't close the handle here, wait for the object finalizer
287 * to do it. Otherwise, the following race condition applies:
289 * 1) Thread exits (and handle_remove() closes the handle)
291 * 2) Some other handle is reassigned the same slot
293 * 3) Another thread tries to join the first thread, and
294 * blocks waiting for the reassigned handle to be signalled
295 * (which might never happen). This is possible, because the
296 * thread calling Join() still has a reference to the first
302 static void ensure_synch_cs_set (MonoInternalThread *thread)
304 CRITICAL_SECTION *synch_cs;
306 if (thread->synch_cs != NULL) {
310 synch_cs = g_new0 (CRITICAL_SECTION, 1);
311 InitializeCriticalSection (synch_cs);
313 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
314 synch_cs, NULL) != NULL) {
315 /* Another thread must have installed this CS */
316 DeleteCriticalSection (synch_cs);
322 * NOTE: this function can be called also for threads different from the current one:
323 * make sure no code called from it will ever assume it is run on the thread that is
324 * getting cleaned up.
326 static void thread_cleanup (MonoInternalThread *thread)
328 g_assert (thread != NULL);
330 if (thread->abort_state_handle) {
331 mono_gchandle_free (thread->abort_state_handle);
332 thread->abort_state_handle = 0;
334 thread->abort_exc = NULL;
335 thread->current_appcontext = NULL;
338 * This is necessary because otherwise we might have
339 * cross-domain references which will not get cleaned up when
340 * the target domain is unloaded.
342 if (thread->cached_culture_info) {
344 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
345 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
348 /* if the thread is not in the hash it has been removed already */
349 if (!handle_remove (thread)) {
350 /* This needs to be called even if handle_remove () fails */
351 if (mono_thread_cleanup_fn)
352 mono_thread_cleanup_fn (thread);
355 mono_release_type_locks (thread);
357 EnterCriticalSection (thread->synch_cs);
359 thread->state |= ThreadState_Stopped;
360 thread->state &= ~ThreadState_Background;
362 LeaveCriticalSection (thread->synch_cs);
364 mono_profiler_thread_end (thread->tid);
366 if (thread == mono_thread_internal_current ())
367 mono_thread_pop_appdomain_ref ();
369 thread->cached_culture_info = NULL;
371 mono_free_static_data (thread->static_data, TRUE);
372 thread->static_data = NULL;
373 ref_stack_destroy (thread->appdomain_refs);
374 thread->appdomain_refs = NULL;
376 if (mono_thread_cleanup_fn)
377 mono_thread_cleanup_fn (thread);
379 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
383 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
386 g_assert ((offset & 0x80000000) == 0);
387 offset &= 0x7fffffff;
388 idx = (offset >> 24) - 1;
389 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
393 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
395 static MonoClassField *current_thread_field = NULL;
399 if (!current_thread_field) {
400 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
401 g_assert (current_thread_field);
404 mono_class_vtable (domain, mono_defaults.thread_class);
405 mono_domain_lock (domain);
406 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
407 mono_domain_unlock (domain);
410 return get_thread_static_data (thread, offset);
414 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
416 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
418 g_assert (current->obj.vtable->domain == domain);
420 g_assert (!*current_thread_ptr);
421 *current_thread_ptr = current;
424 static MonoInternalThread*
425 create_internal_thread_object (void)
427 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
428 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
432 create_thread_object (MonoDomain *domain)
434 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
435 return (MonoThread*)mono_gc_alloc_mature (vt);
439 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
441 MonoThread *thread = create_thread_object (domain);
442 MONO_OBJECT_SETREF (thread, internal_thread, internal);
447 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
449 MonoDomain *domain = mono_get_root_domain ();
451 if (!candidate || candidate->obj.vtable->domain != domain)
452 candidate = new_thread_with_internal (domain, thread);
453 set_current_thread_for_domain (domain, thread, candidate);
454 g_assert (!thread->root_domain_thread);
455 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
458 static guint32 WINAPI start_wrapper_internal(void *data)
460 MonoThreadInfo *info;
461 struct StartInfo *start_info=(struct StartInfo *)data;
462 guint32 (*start_func)(void *);
466 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
469 MonoInternalThread *internal = start_info->obj->internal_thread;
470 MonoObject *start_delegate = start_info->delegate;
471 MonoDomain *domain = start_info->obj->obj.vtable->domain;
473 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
475 /* We can be sure start_info->obj->tid and
476 * start_info->obj->handle have been set, because the thread
477 * was created suspended, and these values were set before the
481 info = mono_thread_info_current ();
483 internal->thread_info = info;
488 SET_CURRENT_OBJECT (internal);
490 mono_monitor_init_tls ();
492 /* Every thread references the appdomain which created it */
493 mono_thread_push_appdomain_ref (domain);
495 if (!mono_domain_set (domain, FALSE)) {
496 /* No point in raising an appdomain_unloaded exception here */
497 /* FIXME: Cleanup here */
498 mono_thread_pop_appdomain_ref ();
502 start_func = start_info->func;
503 start_arg = start_info->start_arg;
505 /* We have to do this here because mono_thread_new_init()
506 requires that root_domain_thread is set up. */
507 thread_adjust_static_data (internal);
508 init_root_domain_thread (internal, start_info->obj);
510 /* This MUST be called before any managed code can be
511 * executed, as it calls the callback function that (for the
512 * jit) sets the lmf marker.
514 mono_thread_new_init (tid, &tid, start_func);
515 internal->stack_ptr = &tid;
517 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
519 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
521 /* On 2.0 profile (and higher), set explicitly since state might have been
523 if (internal->apartment_state == ThreadApartmentState_Unknown)
524 internal->apartment_state = ThreadApartmentState_MTA;
526 mono_thread_init_apartment_state ();
528 if(internal->start_notify!=NULL) {
529 /* Let the thread that called Start() know we're
532 ReleaseSemaphore (internal->start_notify, 1, NULL);
535 mono_threads_lock ();
536 mono_g_hash_table_remove (thread_start_args, start_info->obj);
537 mono_threads_unlock ();
539 mono_thread_set_execution_context (start_info->obj->ec_to_set);
540 start_info->obj->ec_to_set = NULL;
543 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
547 * Call this after calling start_notify, since the profiler callback might want
548 * to lock the thread, and the lock is held by thread_start () which waits for
551 mono_profiler_thread_start (tid);
553 /* start_func is set only for unmanaged start functions */
555 start_func (start_arg);
558 g_assert (start_delegate != NULL);
559 args [0] = start_arg;
560 /* we may want to handle the exception here. See comment below on unhandled exceptions */
561 mono_runtime_delegate_invoke (start_delegate, args, NULL);
564 /* If the thread calls ExitThread at all, this remaining code
565 * will not be executed, but the main thread will eventually
566 * call thread_cleanup() on this thread's behalf.
569 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
571 thread_cleanup (internal);
573 /* Do any cleanup needed for apartment state. This
574 * cannot be done in thread_cleanup since thread_cleanup could be
575 * called for a thread other than the current thread.
576 * mono_thread_cleanup_apartment_state cleans up apartment
577 * for the current thead */
578 mono_thread_cleanup_apartment_state ();
580 /* Remove the reference to the thread object in the TLS data,
581 * so the thread object can be finalized. This won't be
582 * reached if the thread threw an uncaught exception, so those
583 * thread handles will stay referenced :-( (This is due to
584 * missing support for scanning thread-specific data in the
585 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
588 SET_CURRENT_OBJECT (NULL);
589 mono_domain_unset ();
594 static guint32 WINAPI start_wrapper(void *data)
599 /* Avoid scanning the frames above this frame during a GC */
600 mono_gc_set_stack_end ((void*)&dummy);
603 return start_wrapper_internal (data);
606 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
608 if (mono_thread_start_cb) {
609 mono_thread_start_cb (tid, stack_start, func);
613 void mono_threads_set_default_stacksize (guint32 stacksize)
615 default_stacksize = stacksize;
618 guint32 mono_threads_get_default_stacksize (void)
620 return default_stacksize;
624 * mono_create_thread:
626 * This is a wrapper around CreateThread which handles differences in the type of
627 * the the 'tid' argument.
629 gpointer mono_create_thread (WapiSecurityAttributes *security,
630 guint32 stacksize, WapiThreadStart start,
631 gpointer param, guint32 create, gsize *tid)
638 res = CreateThread (security, stacksize, start, param, create, &real_tid);
642 res = CreateThread (security, stacksize, start, param, create, tid);
649 * The thread start argument may be an object reference, and there is
650 * no ref to keep it alive when the new thread is started but not yet
651 * registered with the collector. So we store it in a GC tracked hash
654 * LOCKING: Assumes the threads lock is held.
657 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
659 if (thread_start_args == NULL) {
660 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
661 thread_start_args = mono_g_hash_table_new (NULL, NULL);
663 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
666 MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
669 MonoInternalThread *internal;
670 HANDLE thread_handle;
671 struct StartInfo *start_info;
674 thread = create_thread_object (domain);
675 internal = create_internal_thread_object ();
676 MONO_OBJECT_SETREF (thread, internal_thread, internal);
678 start_info=g_new0 (struct StartInfo, 1);
679 start_info->func = func;
680 start_info->obj = thread;
681 start_info->start_arg = arg;
683 mono_threads_lock ();
685 mono_threads_unlock ();
689 if (threads_starting_up == NULL) {
690 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
691 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
694 register_thread_start_argument (thread, start_info);
695 mono_g_hash_table_insert (threads_starting_up, thread, thread);
696 mono_threads_unlock ();
699 stack_size = default_stacksize_for_thread (internal);
701 /* Create suspended, so we can do some housekeeping before the thread
704 thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
705 CREATE_SUSPENDED, &tid);
706 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
707 if (thread_handle == NULL) {
708 /* The thread couldn't be created, so throw an exception */
709 mono_threads_lock ();
710 mono_g_hash_table_remove (threads_starting_up, thread);
711 mono_threads_unlock ();
713 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
717 internal->handle=thread_handle;
719 internal->apartment_state=ThreadApartmentState_Unknown;
720 internal->thread_pinning_ref = internal;
721 MONO_GC_REGISTER_ROOT (internal->thread_pinning_ref);
723 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
724 InitializeCriticalSection (internal->synch_cs);
726 internal->threadpool_thread = threadpool_thread;
727 if (threadpool_thread)
728 mono_thread_set_state (internal, ThreadState_Background);
730 if (handle_store (thread))
731 ResumeThread (thread_handle);
737 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
739 mono_thread_create_internal (domain, func, arg, FALSE, 0);
743 * mono_thread_get_stack_bounds:
745 * Return the address and size of the current threads stack. Return NULL as the
746 * stack address if the stack address cannot be determined.
749 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
751 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
752 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
753 *stsize = pthread_get_stacksize_np (pthread_self ());
754 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
756 /* FIXME: simplify the mess below */
757 #elif !defined(HOST_WIN32)
759 guint8 *current = (guint8*)&attr;
761 pthread_attr_init (&attr);
762 # ifdef HAVE_PTHREAD_GETATTR_NP
763 pthread_getattr_np (pthread_self(), &attr);
765 # ifdef HAVE_PTHREAD_ATTR_GET_NP
766 pthread_attr_get_np (pthread_self(), &attr);
769 pthread_attr_getstacksize (&attr, &stsize);
770 # elif defined(__OpenBSD__)
774 rslt = pthread_stackseg_np(pthread_self(), &ss);
775 g_assert (rslt == 0);
777 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
778 *stsize = ss.ss_size;
787 # if !defined(__OpenBSD__)
788 pthread_attr_getstack (&attr, (void**)staddr, stsize);
791 g_assert ((current > *staddr) && (current < *staddr + *stsize));
794 pthread_attr_destroy (&attr);
797 *stsize = (size_t)-1;
800 /* When running under emacs, sometimes staddr is not aligned to a page size */
801 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
805 mono_thread_attach (MonoDomain *domain)
807 MonoInternalThread *thread;
808 MonoThread *current_thread;
809 HANDLE thread_handle;
812 if ((thread = mono_thread_internal_current ())) {
813 if (domain != mono_domain_get ())
814 mono_domain_set (domain, TRUE);
815 /* Already attached */
816 return mono_thread_current ();
819 if (!mono_gc_register_thread (&domain)) {
820 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 ());
823 thread = create_internal_thread_object ();
825 thread_handle = GetCurrentThread ();
826 g_assert (thread_handle);
828 tid=GetCurrentThreadId ();
831 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
832 * refer to the thread from other threads for things like aborting.
834 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
835 THREAD_ALL_ACCESS, TRUE, 0);
837 thread->handle=thread_handle;
839 #ifdef PLATFORM_ANDROID
840 thread->android_tid = (gpointer) gettid ();
842 thread->apartment_state=ThreadApartmentState_Unknown;
843 thread->thread_pinning_ref = thread;
844 MONO_GC_REGISTER_ROOT (thread->thread_pinning_ref);
846 thread->stack_ptr = &tid;
848 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
849 InitializeCriticalSection (thread->synch_cs);
851 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
853 current_thread = new_thread_with_internal (domain, thread);
855 if (!handle_store (current_thread)) {
856 /* Mono is shutting down, so just wait for the end */
861 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
863 SET_CURRENT_OBJECT (thread);
864 mono_domain_set (domain, TRUE);
866 mono_monitor_init_tls ();
868 thread_adjust_static_data (thread);
870 init_root_domain_thread (thread, current_thread);
871 if (domain != mono_get_root_domain ())
872 set_current_thread_for_domain (domain, thread, current_thread);
875 if (mono_thread_attach_cb) {
879 mono_thread_get_stack_bounds (&staddr, &stsize);
882 mono_thread_attach_cb (tid, &tid);
884 mono_thread_attach_cb (tid, staddr + stsize);
887 // FIXME: Need a separate callback
888 mono_profiler_thread_start (tid);
890 return current_thread;
894 mono_thread_detach (MonoThread *thread)
896 g_return_if_fail (thread != NULL);
898 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
900 thread_cleanup (thread->internal_thread);
902 SET_CURRENT_OBJECT (NULL);
903 mono_domain_unset ();
905 /* Don't need to CloseHandle this thread, even though we took a
906 * reference in mono_thread_attach (), because the GC will do it
907 * when the Thread object is finalised.
914 MonoInternalThread *thread = mono_thread_internal_current ();
916 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
918 thread_cleanup (thread);
919 SET_CURRENT_OBJECT (NULL);
920 mono_domain_unset ();
922 /* we could add a callback here for embedders to use. */
923 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
924 exit (mono_environment_exitcode_get ());
929 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
931 MonoInternalThread *internal = create_internal_thread_object ();
933 internal->state = ThreadState_Unstarted;
934 internal->apartment_state = ThreadApartmentState_Unknown;
936 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
939 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
942 guint32 (*start_func)(void *);
943 struct StartInfo *start_info;
946 MonoInternalThread *internal;
948 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
950 if (!this->internal_thread)
951 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
952 internal = this->internal_thread;
954 ensure_synch_cs_set (internal);
956 EnterCriticalSection (internal->synch_cs);
958 if ((internal->state & ThreadState_Unstarted) == 0) {
959 LeaveCriticalSection (internal->synch_cs);
960 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
964 if ((internal->state & ThreadState_Aborted) != 0) {
965 LeaveCriticalSection (internal->synch_cs);
970 /* This is freed in start_wrapper */
971 start_info = g_new0 (struct StartInfo, 1);
972 start_info->func = start_func;
973 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
974 start_info->delegate = start;
975 start_info->obj = this;
976 g_assert (this->obj.vtable->domain == mono_domain_get ());
978 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
979 if (internal->start_notify==NULL) {
980 LeaveCriticalSection (internal->synch_cs);
981 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
986 mono_threads_lock ();
987 register_thread_start_argument (this, start_info);
988 if (threads_starting_up == NULL) {
989 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
990 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
992 mono_g_hash_table_insert (threads_starting_up, this, this);
993 mono_threads_unlock ();
995 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
996 CREATE_SUSPENDED, &tid);
998 LeaveCriticalSection (internal->synch_cs);
999 mono_threads_lock ();
1000 mono_g_hash_table_remove (threads_starting_up, this);
1001 mono_threads_unlock ();
1002 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1006 internal->handle=thread;
1008 internal->thread_pinning_ref = internal;
1009 MONO_GC_REGISTER_ROOT (internal->thread_pinning_ref);
1012 /* Don't call handle_store() here, delay it to Start.
1013 * We can't join a thread (trying to will just block
1014 * forever) until it actually starts running, so don't
1015 * store the handle till then.
1018 mono_thread_start (this);
1020 internal->state &= ~ThreadState_Unstarted;
1022 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1024 LeaveCriticalSection (internal->synch_cs);
1029 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1031 MONO_ARCH_SAVE_REGS;
1033 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1036 CloseHandle (thread);
1038 if (this->synch_cs) {
1039 CRITICAL_SECTION *synch_cs = this->synch_cs;
1040 this->synch_cs = NULL;
1041 DeleteCriticalSection (synch_cs);
1046 void *name = this->name;
1052 static void mono_thread_start (MonoThread *thread)
1054 MonoInternalThread *internal = thread->internal_thread;
1056 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1058 /* Only store the handle when the thread is about to be
1059 * launched, to avoid the main thread deadlocking while trying
1060 * to clean up a thread that will never be signalled.
1062 if (!handle_store (thread))
1065 ResumeThread (internal->handle);
1067 if(internal->start_notify!=NULL) {
1068 /* Wait for the thread to set up its TLS data etc, so
1069 * theres no potential race condition if someone tries
1070 * to look up the data believing the thread has
1074 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1076 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1077 CloseHandle (internal->start_notify);
1078 internal->start_notify = NULL;
1081 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1084 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1087 MonoInternalThread *thread = mono_thread_internal_current ();
1089 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1091 mono_thread_current_check_pending_interrupt ();
1094 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1096 res = SleepEx(ms,TRUE);
1098 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1100 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1101 MonoException* exc = mono_thread_execute_interruption (thread);
1103 mono_raise_exception (exc);
1115 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1120 ves_icall_System_Threading_Thread_GetDomainID (void)
1122 MONO_ARCH_SAVE_REGS;
1124 return mono_domain_get()->domain_id;
1128 ves_icall_System_Threading_Thread_Yield (void)
1131 return SwitchToThread ();
1133 return sched_yield () == 0;
1138 * mono_thread_get_name:
1140 * Return the name of the thread. NAME_LEN is set to the length of the name.
1141 * Return NULL if the thread has no name. The returned memory is owned by the
1145 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1149 ensure_synch_cs_set (this_obj);
1151 EnterCriticalSection (this_obj->synch_cs);
1153 if (!this_obj->name) {
1157 *name_len = this_obj->name_len;
1158 res = g_new (gunichar2, this_obj->name_len);
1159 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1162 LeaveCriticalSection (this_obj->synch_cs);
1168 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1172 ensure_synch_cs_set (this_obj);
1174 EnterCriticalSection (this_obj->synch_cs);
1176 if (!this_obj->name)
1179 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1181 LeaveCriticalSection (this_obj->synch_cs);
1187 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1189 ensure_synch_cs_set (this_obj);
1191 EnterCriticalSection (this_obj->synch_cs);
1193 if (this_obj->name) {
1194 LeaveCriticalSection (this_obj->synch_cs);
1196 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1200 this_obj->name = g_new (gunichar2, mono_string_length (name));
1201 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1202 this_obj->name_len = mono_string_length (name);
1205 this_obj->name = NULL;
1207 LeaveCriticalSection (this_obj->synch_cs);
1208 if (this_obj->name) {
1209 char *tname = mono_string_to_utf8 (name);
1210 mono_profiler_thread_name (this_obj->tid, tname);
1215 /* If the array is already in the requested domain, we just return it,
1216 otherwise we return a copy in that domain. */
1218 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1225 if (mono_object_domain (arr) == domain)
1228 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1229 memcpy (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1234 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1236 return byte_array_to_domain (arr, mono_get_root_domain ());
1240 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1242 return byte_array_to_domain (arr, mono_domain_get ());
1246 mono_thread_current (void)
1248 MonoDomain *domain = mono_domain_get ();
1249 MonoInternalThread *internal = mono_thread_internal_current ();
1250 MonoThread **current_thread_ptr;
1252 g_assert (internal);
1253 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1255 if (!*current_thread_ptr) {
1256 g_assert (domain != mono_get_root_domain ());
1257 *current_thread_ptr = new_thread_with_internal (domain, internal);
1259 return *current_thread_ptr;
1263 mono_thread_internal_current (void)
1265 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1266 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1270 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1271 int ms, HANDLE thread)
1273 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1276 mono_thread_current_check_pending_interrupt ();
1278 ensure_synch_cs_set (this);
1280 EnterCriticalSection (this->synch_cs);
1282 if ((this->state & ThreadState_Unstarted) != 0) {
1283 LeaveCriticalSection (this->synch_cs);
1285 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1289 LeaveCriticalSection (this->synch_cs);
1294 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1296 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1298 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1300 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1302 if(ret==WAIT_OBJECT_0) {
1303 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1308 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1313 /* FIXME: exitContext isnt documented */
1314 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1320 MonoObject *waitHandle;
1321 MonoInternalThread *thread = mono_thread_internal_current ();
1323 /* Do this WaitSleepJoin check before creating objects */
1324 mono_thread_current_check_pending_interrupt ();
1326 numhandles = mono_array_length(mono_handles);
1327 handles = g_new0(HANDLE, numhandles);
1329 for(i = 0; i < numhandles; i++) {
1330 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1331 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1338 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1340 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1342 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1346 if(ret==WAIT_FAILED) {
1347 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1349 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1350 /* Do we want to try again if we get
1351 * WAIT_IO_COMPLETION? The documentation for
1352 * WaitHandle doesn't give any clues. (We'd have to
1353 * fiddle with the timeout if we retry.)
1355 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1362 /* FIXME: exitContext isnt documented */
1363 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1365 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1369 MonoObject *waitHandle;
1370 MonoInternalThread *thread = mono_thread_internal_current ();
1373 /* Do this WaitSleepJoin check before creating objects */
1374 mono_thread_current_check_pending_interrupt ();
1376 numhandles = mono_array_length(mono_handles);
1377 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1380 for(i = 0; i < numhandles; i++) {
1381 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1382 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1389 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1391 start = (ms == -1) ? 0 : mono_msec_ticks ();
1393 ret = WaitForMultipleObjectsEx (numhandles, handles, FALSE, ms, TRUE);
1394 if (ret != WAIT_IO_COMPLETION)
1399 diff = mono_msec_ticks () - start;
1404 } while (ms == -1 || ms > 0);
1406 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1408 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1411 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1413 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1414 return ret - WAIT_OBJECT_0;
1416 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1417 return ret - WAIT_ABANDONED_0;
1424 /* FIXME: exitContext isnt documented */
1425 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1428 MonoInternalThread *thread = mono_thread_internal_current ();
1430 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1436 mono_thread_current_check_pending_interrupt ();
1438 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1440 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1442 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1444 if(ret==WAIT_FAILED) {
1445 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1447 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1448 /* Do we want to try again if we get
1449 * WAIT_IO_COMPLETION? The documentation for
1450 * WaitHandle doesn't give any clues. (We'd have to
1451 * fiddle with the timeout if we retry.)
1453 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1461 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1464 MonoInternalThread *thread = mono_thread_internal_current ();
1466 MONO_ARCH_SAVE_REGS;
1471 mono_thread_current_check_pending_interrupt ();
1473 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1475 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1477 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1479 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1482 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1486 MONO_ARCH_SAVE_REGS;
1491 mutex = CreateMutex (NULL, owned, NULL);
1493 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1495 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1503 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1504 MONO_ARCH_SAVE_REGS;
1506 return(ReleaseMutex (handle));
1509 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1515 MONO_ARCH_SAVE_REGS;
1517 *error = ERROR_SUCCESS;
1519 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1521 *error = GetLastError ();
1528 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1532 MONO_ARCH_SAVE_REGS;
1537 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1539 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1540 mono_string_chars (name));
1542 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1550 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1554 MONO_ARCH_SAVE_REGS;
1556 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1561 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1565 MONO_ARCH_SAVE_REGS;
1567 *error = ERROR_SUCCESS;
1569 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1571 *error = GetLastError ();
1577 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1581 MONO_ARCH_SAVE_REGS;
1586 event = CreateEvent (NULL, manual, initial, NULL);
1588 event = CreateEvent (NULL, manual, initial,
1589 mono_string_chars (name));
1591 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1599 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1600 MONO_ARCH_SAVE_REGS;
1602 return (SetEvent(handle));
1605 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1606 MONO_ARCH_SAVE_REGS;
1608 return (ResetEvent(handle));
1612 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1613 MONO_ARCH_SAVE_REGS;
1615 CloseHandle (handle);
1618 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1624 MONO_ARCH_SAVE_REGS;
1626 *error = ERROR_SUCCESS;
1628 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1630 *error = GetLastError ();
1636 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1638 MONO_ARCH_SAVE_REGS;
1640 return InterlockedIncrement (location);
1643 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1647 MONO_ARCH_SAVE_REGS;
1649 mono_interlocked_lock ();
1653 mono_interlocked_unlock ();
1659 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1661 MONO_ARCH_SAVE_REGS;
1663 return InterlockedDecrement(location);
1666 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1670 MONO_ARCH_SAVE_REGS;
1672 mono_interlocked_lock ();
1676 mono_interlocked_unlock ();
1681 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1683 MONO_ARCH_SAVE_REGS;
1685 return InterlockedExchange(location, value);
1688 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1691 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1692 mono_gc_wbarrier_generic_nostore (location);
1696 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1698 return InterlockedExchangePointer(location, value);
1701 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1703 IntFloatUnion val, ret;
1705 MONO_ARCH_SAVE_REGS;
1708 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1714 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1716 #if SIZEOF_VOID_P == 8
1717 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1722 * According to MSDN, this function is only atomic with regards to the
1723 * other Interlocked functions on 32 bit platforms.
1725 mono_interlocked_lock ();
1728 mono_interlocked_unlock ();
1735 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1737 #if SIZEOF_VOID_P == 8
1738 LongDoubleUnion val, ret;
1741 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1748 * According to MSDN, this function is only atomic with regards to the
1749 * other Interlocked functions on 32 bit platforms.
1751 mono_interlocked_lock ();
1754 mono_interlocked_unlock ();
1760 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1762 MONO_ARCH_SAVE_REGS;
1764 return InterlockedCompareExchange(location, value, comparand);
1767 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1770 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1771 mono_gc_wbarrier_generic_nostore (location);
1775 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1777 return InterlockedCompareExchangePointer(location, value, comparand);
1780 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1782 IntFloatUnion val, ret, cmp;
1784 MONO_ARCH_SAVE_REGS;
1787 cmp.fval = comparand;
1788 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1794 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1796 #if SIZEOF_VOID_P == 8
1797 LongDoubleUnion val, comp, ret;
1800 comp.fval = comparand;
1801 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1807 mono_interlocked_lock ();
1809 if (old == comparand)
1811 mono_interlocked_unlock ();
1818 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1820 #if SIZEOF_VOID_P == 8
1821 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1825 mono_interlocked_lock ();
1827 if (old == comparand)
1829 mono_interlocked_unlock ();
1836 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1839 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1840 mono_gc_wbarrier_generic_nostore (location);
1845 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1848 res = InterlockedExchangePointer ((gpointer *)location, value);
1849 mono_gc_wbarrier_generic_nostore (location);
1854 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1856 #if SIZEOF_VOID_P == 8
1857 /* Should be implemented as a JIT intrinsic */
1858 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1863 mono_interlocked_lock ();
1865 *location = orig + value;
1866 mono_interlocked_unlock ();
1868 return orig + value;
1873 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1875 #if SIZEOF_VOID_P == 8
1876 /* Should be implemented as a JIT intrinsic */
1877 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1882 mono_interlocked_lock ();
1884 *location = orig + value;
1885 mono_interlocked_unlock ();
1887 return orig + value;
1892 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1894 #if SIZEOF_VOID_P == 8
1895 /* 64 bit reads are already atomic */
1900 mono_interlocked_lock ();
1902 mono_interlocked_unlock ();
1909 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1911 mono_threads_lock ();
1912 mono_threads_unlock ();
1916 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1918 mono_thread_clr_state (this, state);
1920 if (state & ThreadState_Background) {
1921 /* If the thread changes the background mode, the main thread has to
1922 * be notified, since it has to rebuild the list of threads to
1925 SetEvent (background_change_event);
1930 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1932 mono_thread_set_state (this, state);
1934 if (state & ThreadState_Background) {
1935 /* If the thread changes the background mode, the main thread has to
1936 * be notified, since it has to rebuild the list of threads to
1939 SetEvent (background_change_event);
1944 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1948 ensure_synch_cs_set (this);
1950 EnterCriticalSection (this->synch_cs);
1952 state = this->state;
1954 LeaveCriticalSection (this->synch_cs);
1959 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1961 gboolean throw = FALSE;
1963 ensure_synch_cs_set (this);
1965 if (this == mono_thread_internal_current ())
1968 EnterCriticalSection (this->synch_cs);
1970 this->thread_interrupt_requested = TRUE;
1972 if (this->state & ThreadState_WaitSleepJoin) {
1976 LeaveCriticalSection (this->synch_cs);
1979 signal_thread_state_change (this);
1983 void mono_thread_current_check_pending_interrupt ()
1985 MonoInternalThread *thread = mono_thread_internal_current ();
1986 gboolean throw = FALSE;
1988 mono_debugger_check_interruption ();
1990 ensure_synch_cs_set (thread);
1992 EnterCriticalSection (thread->synch_cs);
1994 if (thread->thread_interrupt_requested) {
1996 thread->thread_interrupt_requested = FALSE;
1999 LeaveCriticalSection (thread->synch_cs);
2002 mono_raise_exception (mono_get_exception_thread_interrupted ());
2007 mono_thread_get_abort_signal (void)
2019 static int abort_signum = -1;
2021 if (abort_signum != -1)
2022 return abort_signum;
2023 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2024 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2025 struct sigaction sinfo;
2026 sigaction (i, NULL, &sinfo);
2027 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2032 /* fallback to the old way */
2035 #endif /* HOST_WIN32 */
2039 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2041 MonoException* exc = mono_thread_request_interruption (FALSE);
2042 if (exc) mono_raise_exception (exc);
2044 #endif /* HOST_WIN32 */
2047 * signal_thread_state_change
2049 * Tells the thread that his state has changed and it has to enter the new
2050 * state as soon as possible.
2052 static void signal_thread_state_change (MonoInternalThread *thread)
2054 if (thread == mono_thread_internal_current ()) {
2055 /* Do it synchronously */
2056 MonoException *exc = mono_thread_request_interruption (FALSE);
2058 mono_raise_exception (exc);
2062 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2064 /* fixme: store the state somewhere */
2065 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2068 * This will cause waits to be broken.
2069 * It will also prevent the thread from entering a wait, so if the thread returns
2070 * from the wait before it receives the abort signal, it will just spin in the wait
2071 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2074 wapi_interrupt_thread (thread->handle);
2075 #endif /* HOST_WIN32 */
2079 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2081 ensure_synch_cs_set (thread);
2083 EnterCriticalSection (thread->synch_cs);
2085 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2086 (thread->state & ThreadState_StopRequested) != 0 ||
2087 (thread->state & ThreadState_Stopped) != 0)
2089 LeaveCriticalSection (thread->synch_cs);
2093 if ((thread->state & ThreadState_Unstarted) != 0) {
2094 thread->state |= ThreadState_Aborted;
2095 LeaveCriticalSection (thread->synch_cs);
2099 thread->state |= ThreadState_AbortRequested;
2100 if (thread->abort_state_handle)
2101 mono_gchandle_free (thread->abort_state_handle);
2103 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2104 g_assert (thread->abort_state_handle);
2106 thread->abort_state_handle = 0;
2108 thread->abort_exc = NULL;
2111 * abort_exc is set in mono_thread_execute_interruption(),
2112 * triggered by the call to signal_thread_state_change(),
2113 * below. There's a point between where we have
2114 * abort_state_handle set, but abort_exc NULL, but that's not
2118 LeaveCriticalSection (thread->synch_cs);
2120 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2122 /* During shutdown, we can't wait for other threads */
2124 /* Make sure the thread is awake */
2125 mono_thread_resume (thread);
2127 signal_thread_state_change (thread);
2131 ves_icall_System_Threading_Thread_ResetAbort (void)
2133 MonoInternalThread *thread = mono_thread_internal_current ();
2134 gboolean was_aborting;
2136 ensure_synch_cs_set (thread);
2138 EnterCriticalSection (thread->synch_cs);
2139 was_aborting = thread->state & ThreadState_AbortRequested;
2140 thread->state &= ~ThreadState_AbortRequested;
2141 LeaveCriticalSection (thread->synch_cs);
2143 if (!was_aborting) {
2144 const char *msg = "Unable to reset abort because no abort was requested";
2145 mono_raise_exception (mono_get_exception_thread_state (msg));
2147 thread->abort_exc = NULL;
2148 if (thread->abort_state_handle) {
2149 mono_gchandle_free (thread->abort_state_handle);
2150 /* This is actually not necessary - the handle
2151 only counts if the exception is set */
2152 thread->abort_state_handle = 0;
2157 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2159 ensure_synch_cs_set (thread);
2161 EnterCriticalSection (thread->synch_cs);
2163 thread->state &= ~ThreadState_AbortRequested;
2165 if (thread->abort_exc) {
2166 thread->abort_exc = NULL;
2167 if (thread->abort_state_handle) {
2168 mono_gchandle_free (thread->abort_state_handle);
2169 /* This is actually not necessary - the handle
2170 only counts if the exception is set */
2171 thread->abort_state_handle = 0;
2175 LeaveCriticalSection (thread->synch_cs);
2179 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2181 MonoInternalThread *thread = this->internal_thread;
2182 MonoObject *state, *deserialized = NULL, *exc;
2185 if (!thread->abort_state_handle)
2188 state = mono_gchandle_get_target (thread->abort_state_handle);
2191 domain = mono_domain_get ();
2192 if (mono_object_domain (state) == domain)
2195 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2197 if (!deserialized) {
2198 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2200 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2201 mono_raise_exception (invalid_op_exc);
2204 return deserialized;
2208 mono_thread_suspend (MonoInternalThread *thread)
2210 ensure_synch_cs_set (thread);
2212 EnterCriticalSection (thread->synch_cs);
2214 if ((thread->state & ThreadState_Unstarted) != 0 ||
2215 (thread->state & ThreadState_Aborted) != 0 ||
2216 (thread->state & ThreadState_Stopped) != 0)
2218 LeaveCriticalSection (thread->synch_cs);
2222 if ((thread->state & ThreadState_Suspended) != 0 ||
2223 (thread->state & ThreadState_SuspendRequested) != 0 ||
2224 (thread->state & ThreadState_StopRequested) != 0)
2226 LeaveCriticalSection (thread->synch_cs);
2230 thread->state |= ThreadState_SuspendRequested;
2232 LeaveCriticalSection (thread->synch_cs);
2234 signal_thread_state_change (thread);
2239 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2241 if (!mono_thread_suspend (thread))
2242 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2246 mono_thread_resume (MonoInternalThread *thread)
2248 ensure_synch_cs_set (thread);
2250 EnterCriticalSection (thread->synch_cs);
2252 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2253 thread->state &= ~ThreadState_SuspendRequested;
2254 LeaveCriticalSection (thread->synch_cs);
2258 if ((thread->state & ThreadState_Suspended) == 0 ||
2259 (thread->state & ThreadState_Unstarted) != 0 ||
2260 (thread->state & ThreadState_Aborted) != 0 ||
2261 (thread->state & ThreadState_Stopped) != 0)
2263 LeaveCriticalSection (thread->synch_cs);
2267 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2268 if (thread->resume_event == NULL) {
2269 LeaveCriticalSection (thread->synch_cs);
2273 /* Awake the thread */
2274 SetEvent (thread->suspend_event);
2276 LeaveCriticalSection (thread->synch_cs);
2278 /* Wait for the thread to awake */
2279 WaitForSingleObject (thread->resume_event, INFINITE);
2280 CloseHandle (thread->resume_event);
2281 thread->resume_event = NULL;
2287 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2289 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2290 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2294 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2299 if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
2300 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
2301 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
2303 *((gboolean*)data) = TRUE;
2310 is_running_protected_wrapper (void)
2312 gboolean found = FALSE;
2313 mono_stack_walk (find_wrapper, &found);
2317 void mono_thread_internal_stop (MonoInternalThread *thread)
2319 ensure_synch_cs_set (thread);
2321 EnterCriticalSection (thread->synch_cs);
2323 if ((thread->state & ThreadState_StopRequested) != 0 ||
2324 (thread->state & ThreadState_Stopped) != 0)
2326 LeaveCriticalSection (thread->synch_cs);
2330 /* Make sure the thread is awake */
2331 mono_thread_resume (thread);
2333 thread->state |= ThreadState_StopRequested;
2334 thread->state &= ~ThreadState_AbortRequested;
2336 LeaveCriticalSection (thread->synch_cs);
2338 signal_thread_state_change (thread);
2341 void mono_thread_stop (MonoThread *thread)
2343 mono_thread_internal_stop (thread->internal_thread);
2347 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2349 return *((volatile gint8 *) (ptr));
2353 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2355 return *((volatile gint16 *) (ptr));
2359 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2361 return *((volatile gint32 *) (ptr));
2365 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2367 return *((volatile gint64 *) (ptr));
2371 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2373 return (void *) *((volatile void **) ptr);
2377 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2379 *((volatile gint8 *) ptr) = value;
2383 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2385 *((volatile gint16 *) ptr) = value;
2389 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2391 *((volatile gint32 *) ptr) = value;
2395 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2397 *((volatile gint64 *) ptr) = value;
2401 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2403 *((volatile void **) ptr) = value;
2407 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2409 mono_gc_wbarrier_generic_store (ptr, value);
2412 void mono_thread_init (MonoThreadStartCB start_cb,
2413 MonoThreadAttachCB attach_cb)
2415 mono_thread_smr_init ();
2417 InitializeCriticalSection(&threads_mutex);
2418 InitializeCriticalSection(&interlocked_mutex);
2419 InitializeCriticalSection(&contexts_mutex);
2421 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2422 g_assert(background_change_event != NULL);
2424 mono_init_static_data_info (&thread_static_info);
2425 mono_init_static_data_info (&context_static_info);
2427 MONO_FAST_TLS_INIT (tls_current_object);
2428 current_object_key=TlsAlloc();
2429 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2431 mono_thread_start_cb = start_cb;
2432 mono_thread_attach_cb = attach_cb;
2434 /* Get a pseudo handle to the current process. This is just a
2435 * kludge so that wapi can build a process handle if needed.
2436 * As a pseudo handle is returned, we don't need to clean
2439 GetCurrentProcess ();
2442 void mono_thread_cleanup (void)
2444 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2445 /* The main thread must abandon any held mutexes (particularly
2446 * important for named mutexes as they are shared across
2447 * processes, see bug 74680.) This will happen when the
2448 * thread exits, but if it's not running in a subthread it
2449 * won't exit in time.
2451 /* Using non-w32 API is a nasty kludge, but I couldn't find
2452 * anything in the documentation that would let me do this
2453 * here yet still be safe to call on windows.
2455 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2459 /* This stuff needs more testing, it seems one of these
2460 * critical sections can be locked when mono_thread_cleanup is
2463 DeleteCriticalSection (&threads_mutex);
2464 DeleteCriticalSection (&interlocked_mutex);
2465 DeleteCriticalSection (&contexts_mutex);
2466 DeleteCriticalSection (&delayed_free_table_mutex);
2467 DeleteCriticalSection (&small_id_mutex);
2468 CloseHandle (background_change_event);
2471 TlsFree (current_object_key);
2475 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2477 mono_thread_cleanup_fn = func;
2481 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2483 thread->internal_thread->manage_callback = func;
2486 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2488 mono_thread_notify_pending_exc_fn = func;
2492 static void print_tids (gpointer key, gpointer value, gpointer user)
2494 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2495 * sizeof(uint) and a cast to uint would overflow
2497 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2498 * print this as a pointer.
2500 g_message ("Waiting for: %p", key);
2505 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2506 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2510 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2514 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2516 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2518 if(ret==WAIT_FAILED) {
2519 /* See the comment in build_wait_tids() */
2520 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2524 for(i=0; i<wait->num; i++)
2525 CloseHandle (wait->handles[i]);
2527 if (ret == WAIT_TIMEOUT)
2530 for(i=0; i<wait->num; i++) {
2531 gsize tid = wait->threads[i]->tid;
2533 mono_threads_lock ();
2534 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2535 /* This thread must have been killed, because
2536 * it hasn't cleaned itself up. (It's just
2537 * possible that the thread exited before the
2538 * parent thread had a chance to store the
2539 * handle, and now there is another pointer to
2540 * the already-exited thread stored. In this
2541 * case, we'll just get two
2542 * mono_profiler_thread_end() calls for the
2546 mono_threads_unlock ();
2547 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2548 thread_cleanup (wait->threads[i]);
2550 mono_threads_unlock ();
2555 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2557 guint32 i, ret, count;
2559 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2561 /* Add the thread state change event, so it wakes up if a thread changes
2562 * to background mode.
2565 if (count < MAXIMUM_WAIT_OBJECTS) {
2566 wait->handles [count] = background_change_event;
2570 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2572 if(ret==WAIT_FAILED) {
2573 /* See the comment in build_wait_tids() */
2574 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2578 for(i=0; i<wait->num; i++)
2579 CloseHandle (wait->handles[i]);
2581 if (ret == WAIT_TIMEOUT)
2584 if (ret < wait->num) {
2585 gsize tid = wait->threads[ret]->tid;
2586 mono_threads_lock ();
2587 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2588 /* See comment in wait_for_tids about thread cleanup */
2589 mono_threads_unlock ();
2590 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2591 thread_cleanup (wait->threads [ret]);
2593 mono_threads_unlock ();
2597 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2599 struct wait_data *wait=(struct wait_data *)user;
2601 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2603 MonoInternalThread *thread=(MonoInternalThread *)value;
2605 /* Ignore background threads, we abort them later */
2606 /* Do not lock here since it is not needed and the caller holds threads_lock */
2607 if (thread->state & ThreadState_Background) {
2608 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2609 return; /* just leave, ignore */
2612 if (mono_gc_is_finalizer_internal_thread (thread)) {
2613 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2617 if (thread == mono_thread_internal_current ()) {
2618 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2622 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2623 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2627 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2628 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2632 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2633 if (handle == NULL) {
2634 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2638 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2639 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2640 wait->handles[wait->num]=handle;
2641 wait->threads[wait->num]=thread;
2644 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2646 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2651 /* Just ignore the rest, we can't do anything with
2658 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2660 struct wait_data *wait=(struct wait_data *)user;
2661 gsize self = GetCurrentThreadId ();
2662 MonoInternalThread *thread = value;
2665 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2668 /* The finalizer thread is not a background thread */
2669 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2670 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2672 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2676 /* printf ("A: %d\n", wait->num); */
2677 wait->handles[wait->num]=thread->handle;
2678 wait->threads[wait->num]=thread;
2681 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2682 mono_thread_internal_stop (thread);
2686 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2690 * mono_threads_set_shutting_down:
2692 * Is called by a thread that wants to shut down Mono. If the runtime is already
2693 * shutting down, the calling thread is suspended/stopped, and this function never
2697 mono_threads_set_shutting_down (void)
2699 MonoInternalThread *current_thread = mono_thread_internal_current ();
2701 mono_threads_lock ();
2703 if (shutting_down) {
2704 mono_threads_unlock ();
2706 /* Make sure we're properly suspended/stopped */
2708 EnterCriticalSection (current_thread->synch_cs);
2710 if ((current_thread->state & ThreadState_SuspendRequested) ||
2711 (current_thread->state & ThreadState_AbortRequested) ||
2712 (current_thread->state & ThreadState_StopRequested)) {
2713 LeaveCriticalSection (current_thread->synch_cs);
2714 mono_thread_execute_interruption (current_thread);
2716 current_thread->state |= ThreadState_Stopped;
2717 LeaveCriticalSection (current_thread->synch_cs);
2720 /*since we're killing the thread, unset the current domain.*/
2721 mono_domain_unset ();
2723 /* Wake up other threads potentially waiting for us */
2726 shutting_down = TRUE;
2728 /* Not really a background state change, but this will
2729 * interrupt the main thread if it is waiting for all
2730 * the other threads.
2732 SetEvent (background_change_event);
2734 mono_threads_unlock ();
2739 * mono_threads_is_shutting_down:
2741 * Returns whether a thread has commenced shutdown of Mono. Note that
2742 * if the function returns FALSE the caller must not assume that
2743 * shutdown is not in progress, because the situation might have
2744 * changed since the function returned. For that reason this function
2745 * is of very limited utility.
2748 mono_threads_is_shutting_down (void)
2750 return shutting_down;
2753 void mono_thread_manage (void)
2755 struct wait_data wait_data;
2756 struct wait_data *wait = &wait_data;
2758 memset (wait, 0, sizeof (struct wait_data));
2759 /* join each thread that's still running */
2760 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2762 mono_threads_lock ();
2764 THREAD_DEBUG (g_message("%s: No threads", __func__));
2765 mono_threads_unlock ();
2768 mono_threads_unlock ();
2771 mono_threads_lock ();
2772 if (shutting_down) {
2773 /* somebody else is shutting down */
2774 mono_threads_unlock ();
2777 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2778 mono_g_hash_table_foreach (threads, print_tids, NULL));
2780 ResetEvent (background_change_event);
2782 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2783 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2784 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2785 mono_threads_unlock ();
2787 /* Something to wait for */
2788 wait_for_tids_or_state_change (wait, INFINITE);
2790 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2791 } while(wait->num>0);
2793 mono_threads_set_shutting_down ();
2795 /* No new threads will be created after this point */
2797 mono_runtime_set_shutting_down ();
2799 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2800 mono_thread_pool_cleanup ();
2803 * Remove everything but the finalizer thread and self.
2804 * Also abort all the background threads
2807 mono_threads_lock ();
2810 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2811 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2812 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2814 mono_threads_unlock ();
2816 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2818 /* Something to wait for */
2819 wait_for_tids (wait, INFINITE);
2821 } while (wait->num > 0);
2824 * give the subthreads a chance to really quit (this is mainly needed
2825 * to get correct user and system times from getrusage/wait/time(1)).
2826 * This could be removed if we avoid pthread_detach() and use pthread_join().
2833 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2835 MonoInternalThread *thread=(MonoInternalThread *)value;
2837 if(thread->tid != (gsize)user) {
2838 /*TerminateThread (thread->handle, -1);*/
2842 void mono_thread_abort_all_other_threads (void)
2844 gsize self = GetCurrentThreadId ();
2846 mono_threads_lock ();
2847 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2848 mono_g_hash_table_size (threads));
2849 mono_g_hash_table_foreach (threads, print_tids, NULL));
2851 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2853 mono_threads_unlock ();
2857 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2859 MonoInternalThread *thread = (MonoInternalThread*)value;
2860 struct wait_data *wait = (struct wait_data*)user_data;
2864 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2866 * This needs no locking.
2868 if ((thread->state & ThreadState_Suspended) != 0 ||
2869 (thread->state & ThreadState_Stopped) != 0)
2872 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2873 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2877 wait->handles [wait->num] = handle;
2878 wait->threads [wait->num] = thread;
2884 * mono_thread_suspend_all_other_threads:
2886 * Suspend all managed threads except the finalizer thread and this thread. It is
2887 * not possible to resume them later.
2889 void mono_thread_suspend_all_other_threads (void)
2891 struct wait_data wait_data;
2892 struct wait_data *wait = &wait_data;
2894 gsize self = GetCurrentThreadId ();
2896 guint32 eventidx = 0;
2897 gboolean starting, finished;
2899 memset (wait, 0, sizeof (struct wait_data));
2901 * The other threads could be in an arbitrary state at this point, i.e.
2902 * they could be starting up, shutting down etc. This means that there could be
2903 * threads which are not even in the threads hash table yet.
2907 * First we set a barrier which will be checked by all threads before they
2908 * are added to the threads hash table, and they will exit if the flag is set.
2909 * This ensures that no threads could be added to the hash later.
2910 * We will use shutting_down as the barrier for now.
2912 g_assert (shutting_down);
2915 * We make multiple calls to WaitForMultipleObjects since:
2916 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
2917 * - some threads could exit without becoming suspended
2922 * Make a copy of the hashtable since we can't do anything with
2923 * threads while threads_mutex is held.
2926 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2927 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2928 mono_threads_lock ();
2929 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
2930 mono_threads_unlock ();
2932 events = g_new0 (gpointer, wait->num);
2934 /* Get the suspended events that we'll be waiting for */
2935 for (i = 0; i < wait->num; ++i) {
2936 MonoInternalThread *thread = wait->threads [i];
2937 gboolean signal_suspend = FALSE;
2939 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2940 //CloseHandle (wait->handles [i]);
2941 wait->threads [i] = NULL; /* ignore this thread in next loop */
2945 ensure_synch_cs_set (thread);
2947 EnterCriticalSection (thread->synch_cs);
2949 if (thread->suspended_event == NULL) {
2950 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2951 if (thread->suspended_event == NULL) {
2952 /* Forget this one and go on to the next */
2953 LeaveCriticalSection (thread->synch_cs);
2958 if ((thread->state & ThreadState_Suspended) != 0 ||
2959 (thread->state & ThreadState_StopRequested) != 0 ||
2960 (thread->state & ThreadState_Stopped) != 0) {
2961 LeaveCriticalSection (thread->synch_cs);
2962 CloseHandle (wait->handles [i]);
2963 wait->threads [i] = NULL; /* ignore this thread in next loop */
2967 if ((thread->state & ThreadState_SuspendRequested) == 0)
2968 signal_suspend = TRUE;
2970 events [eventidx++] = thread->suspended_event;
2972 /* Convert abort requests into suspend requests */
2973 if ((thread->state & ThreadState_AbortRequested) != 0)
2974 thread->state &= ~ThreadState_AbortRequested;
2976 thread->state |= ThreadState_SuspendRequested;
2978 LeaveCriticalSection (thread->synch_cs);
2980 /* Signal the thread to suspend */
2982 signal_thread_state_change (thread);
2986 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
2987 for (i = 0; i < wait->num; ++i) {
2988 MonoInternalThread *thread = wait->threads [i];
2993 ensure_synch_cs_set (thread);
2995 EnterCriticalSection (thread->synch_cs);
2996 if ((thread->state & ThreadState_Suspended) != 0) {
2997 CloseHandle (thread->suspended_event);
2998 thread->suspended_event = NULL;
3000 LeaveCriticalSection (thread->synch_cs);
3004 * If there are threads which are starting up, we wait until they
3005 * are suspended when they try to register in the threads hash.
3006 * This is guaranteed to finish, since the threads which can create new
3007 * threads get suspended after a while.
3008 * FIXME: The finalizer thread can still create new threads.
3010 mono_threads_lock ();
3011 if (threads_starting_up)
3012 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3015 mono_threads_unlock ();
3027 collect_threads (gpointer key, gpointer value, gpointer user_data)
3029 MonoInternalThread *thread = (MonoInternalThread*)value;
3030 struct wait_data *wait = (struct wait_data*)user_data;
3033 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3034 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3038 wait->handles [wait->num] = handle;
3039 wait->threads [wait->num] = thread;
3045 * mono_threads_request_thread_dump:
3047 * Ask all threads except the current to print their stacktrace to stdout.
3050 mono_threads_request_thread_dump (void)
3052 struct wait_data wait_data;
3053 struct wait_data *wait = &wait_data;
3056 memset (wait, 0, sizeof (struct wait_data));
3059 * Make a copy of the hashtable since we can't do anything with
3060 * threads while threads_mutex is held.
3062 mono_threads_lock ();
3063 mono_g_hash_table_foreach (threads, collect_threads, wait);
3064 mono_threads_unlock ();
3066 for (i = 0; i < wait->num; ++i) {
3067 MonoInternalThread *thread = wait->threads [i];
3069 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3070 (thread != mono_thread_internal_current ()) &&
3071 !thread->thread_dump_requested) {
3072 thread->thread_dump_requested = TRUE;
3074 signal_thread_state_change (thread);
3077 CloseHandle (wait->handles [i]);
3083 gint allocated; /* +1 so that refs [allocated] == NULL */
3087 typedef struct ref_stack RefStack;
3090 ref_stack_new (gint initial_size)
3094 initial_size = MAX (initial_size, 16) + 1;
3095 rs = g_new0 (RefStack, 1);
3096 rs->refs = g_new0 (gpointer, initial_size);
3097 rs->allocated = initial_size;
3102 ref_stack_destroy (gpointer ptr)
3113 ref_stack_push (RefStack *rs, gpointer ptr)
3115 g_assert (rs != NULL);
3117 if (rs->bottom >= rs->allocated) {
3118 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3119 rs->allocated <<= 1;
3120 rs->refs [rs->allocated] = NULL;
3122 rs->refs [rs->bottom++] = ptr;
3126 ref_stack_pop (RefStack *rs)
3128 if (rs == NULL || rs->bottom == 0)
3132 rs->refs [rs->bottom] = NULL;
3136 ref_stack_find (RefStack *rs, gpointer ptr)
3143 for (refs = rs->refs; refs && *refs; refs++) {
3151 * mono_thread_push_appdomain_ref:
3153 * Register that the current thread may have references to objects in domain
3154 * @domain on its stack. Each call to this function should be paired with a
3155 * call to pop_appdomain_ref.
3158 mono_thread_push_appdomain_ref (MonoDomain *domain)
3160 MonoInternalThread *thread = mono_thread_internal_current ();
3163 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3164 SPIN_LOCK (thread->lock_thread_id);
3165 if (thread->appdomain_refs == NULL)
3166 thread->appdomain_refs = ref_stack_new (16);
3167 ref_stack_push (thread->appdomain_refs, domain);
3168 SPIN_UNLOCK (thread->lock_thread_id);
3173 mono_thread_pop_appdomain_ref (void)
3175 MonoInternalThread *thread = mono_thread_internal_current ();
3178 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3179 SPIN_LOCK (thread->lock_thread_id);
3180 ref_stack_pop (thread->appdomain_refs);
3181 SPIN_UNLOCK (thread->lock_thread_id);
3186 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3189 SPIN_LOCK (thread->lock_thread_id);
3190 res = ref_stack_find (thread->appdomain_refs, domain);
3191 SPIN_UNLOCK (thread->lock_thread_id);
3196 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3198 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3201 typedef struct abort_appdomain_data {
3202 struct wait_data wait;
3204 } abort_appdomain_data;
3207 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3209 MonoInternalThread *thread = (MonoInternalThread*)value;
3210 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3211 MonoDomain *domain = data->domain;
3213 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3214 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3216 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3217 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3220 data->wait.handles [data->wait.num] = handle;
3221 data->wait.threads [data->wait.num] = thread;
3224 /* Just ignore the rest, we can't do anything with
3232 * mono_threads_abort_appdomain_threads:
3234 * Abort threads which has references to the given appdomain.
3237 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3239 abort_appdomain_data user_data;
3241 int orig_timeout = timeout;
3244 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3246 start_time = mono_msec_ticks ();
3248 mono_threads_lock ();
3250 user_data.domain = domain;
3251 user_data.wait.num = 0;
3252 /* This shouldn't take any locks */
3253 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3254 mono_threads_unlock ();
3256 if (user_data.wait.num > 0) {
3257 /* Abort the threads outside the threads lock */
3258 for (i = 0; i < user_data.wait.num; ++i)
3259 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3262 * We should wait for the threads either to abort, or to leave the
3263 * domain. We can't do the latter, so we wait with a timeout.
3265 wait_for_tids (&user_data.wait, 100);
3268 /* Update remaining time */
3269 timeout -= mono_msec_ticks () - start_time;
3270 start_time = mono_msec_ticks ();
3272 if (orig_timeout != -1 && timeout < 0)
3275 while (user_data.wait.num > 0);
3277 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3283 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3285 MonoInternalThread *thread = (MonoInternalThread*)value;
3286 MonoDomain *domain = (MonoDomain*)user_data;
3289 /* No locking needed here */
3290 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3292 if (thread->cached_culture_info) {
3293 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3294 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3295 if (obj && obj->vtable->domain == domain)
3296 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3302 * mono_threads_clear_cached_culture:
3304 * Clear the cached_current_culture from all threads if it is in the
3308 mono_threads_clear_cached_culture (MonoDomain *domain)
3310 mono_threads_lock ();
3311 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3312 mono_threads_unlock ();
3316 * mono_thread_get_undeniable_exception:
3318 * Return an exception which needs to be raised when leaving a catch clause.
3319 * This is used for undeniable exception propagation.
3322 mono_thread_get_undeniable_exception (void)
3324 MonoInternalThread *thread = mono_thread_internal_current ();
3326 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3328 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3329 * exception if the thread no longer references a dying appdomain.
3331 thread->abort_exc->trace_ips = NULL;
3332 thread->abort_exc->stack_trace = NULL;
3333 return thread->abort_exc;
3339 #if MONO_SMALL_CONFIG
3340 #define NUM_STATIC_DATA_IDX 4
3341 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3345 #define NUM_STATIC_DATA_IDX 8
3346 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3347 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3351 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3355 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3358 gpointer *static_data = addr;
3359 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3362 if (!static_data [i])
3364 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3365 ptr = static_data [i];
3366 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3367 uintptr_t bmap = static_reference_bitmaps [i][j];
3370 if ((bmap & 1) && *p) {
3382 * mono_alloc_static_data
3384 * Allocate memory blocks for storing threads or context static data
3387 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3389 guint idx = (offset >> 24) - 1;
3392 gpointer* static_data = *static_data_ptr;
3394 static void* tls_desc = NULL;
3397 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3399 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3400 *static_data_ptr = static_data;
3401 static_data [0] = static_data;
3404 for (i = 1; i <= idx; ++i) {
3405 if (static_data [i])
3408 static_data [i] = threadlocal?g_malloc0 (static_data_size [i]):mono_gc_alloc_fixed (static_data_size [i], NULL);
3410 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3416 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3419 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3420 if (!static_data [i])
3424 g_free (static_data [i]);
3426 mono_gc_free_fixed (static_data [i]);
3428 mono_gc_free_fixed (static_data [i]);
3431 mono_gc_free_fixed (static_data);
3435 * mono_init_static_data_info
3437 * Initializes static data counters
3439 static void mono_init_static_data_info (StaticDataInfo *static_data)
3441 static_data->idx = 0;
3442 static_data->offset = 0;
3443 static_data->freelist = NULL;
3447 * mono_alloc_static_data_slot
3449 * Generates an offset for static data. static_data contains the counters
3450 * used to generate it.
3453 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3457 if (!static_data->idx && !static_data->offset) {
3459 * we use the first chunk of the first allocation also as
3460 * an array for the rest of the data
3462 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3464 static_data->offset += align - 1;
3465 static_data->offset &= ~(align - 1);
3466 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3467 static_data->idx ++;
3468 g_assert (size <= static_data_size [static_data->idx]);
3469 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3470 static_data->offset = 0;
3472 offset = static_data->offset | ((static_data->idx + 1) << 24);
3473 static_data->offset += size;
3478 * ensure thread static fields already allocated are valid for thread
3479 * This function is called when a thread is created or on thread attach.
3482 thread_adjust_static_data (MonoInternalThread *thread)
3486 mono_threads_lock ();
3487 if (thread_static_info.offset || thread_static_info.idx > 0) {
3488 /* get the current allocated size */
3489 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3490 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3492 mono_threads_unlock ();
3496 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3498 MonoInternalThread *thread = value;
3499 guint32 offset = GPOINTER_TO_UINT (user);
3501 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3504 static MonoThreadDomainTls*
3505 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3507 MonoThreadDomainTls* prev = NULL;
3508 MonoThreadDomainTls* tmp = static_data->freelist;
3510 if (tmp->size == size) {
3512 prev->next = tmp->next;
3514 static_data->freelist = tmp->next;
3523 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int max_set)
3526 int idx = (offset >> 24) - 1;
3528 if (!static_reference_bitmaps [idx])
3529 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3530 rb = static_reference_bitmaps [idx];
3532 offset /= sizeof (gpointer);
3533 /* offset is now the bitmap offset */
3534 for (i = 0; i < max_set; ++i) {
3535 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3536 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3541 clear_reference_bitmap (guint32 offset, guint32 size)
3543 int idx = (offset >> 24) - 1;
3545 rb = static_reference_bitmaps [idx];
3547 offset /= sizeof (gpointer);
3548 size /= sizeof (gpointer);
3550 /* offset is now the bitmap offset */
3551 for (; offset < size; ++offset)
3552 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3556 * The offset for a special static variable is composed of three parts:
3557 * a bit that indicates the type of static data (0:thread, 1:context),
3558 * an index in the array of chunks of memory for the thread (thread->static_data)
3559 * and an offset in that chunk of mem. This allows allocating less memory in the
3564 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int max_set)
3567 if (static_type == SPECIAL_STATIC_THREAD) {
3568 MonoThreadDomainTls *item;
3569 mono_threads_lock ();
3570 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3571 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3573 offset = item->offset;
3576 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3578 update_tls_reference_bitmap (offset, bitmap, max_set);
3579 /* This can be called during startup */
3580 if (threads != NULL)
3581 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3582 mono_threads_unlock ();
3584 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3585 mono_contexts_lock ();
3586 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3587 mono_contexts_unlock ();
3588 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3594 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3596 /* The high bit means either thread (0) or static (1) data. */
3598 guint32 static_type = (offset & 0x80000000);
3601 offset &= 0x7fffffff;
3602 idx = (offset >> 24) - 1;
3604 if (static_type == 0) {
3605 return get_thread_static_data (thread, offset);
3607 /* Allocate static data block under demand, since we don't have a list
3610 MonoAppContext *context = mono_context_get ();
3611 if (!context->static_data || !context->static_data [idx]) {
3612 mono_contexts_lock ();
3613 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3614 mono_contexts_unlock ();
3616 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3621 mono_get_special_static_data (guint32 offset)
3623 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3632 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3634 MonoInternalThread *thread = value;
3635 TlsOffsetSize *data = user;
3636 int idx = (data->offset >> 24) - 1;
3639 if (!thread->static_data || !thread->static_data [idx])
3641 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3642 memset (ptr, 0, data->size);
3646 do_free_special_slot (guint32 offset, guint32 size)
3648 guint32 static_type = (offset & 0x80000000);
3649 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3650 if (static_type == 0) {
3652 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3653 data.offset = offset & 0x7fffffff;
3655 clear_reference_bitmap (data.offset, data.size);
3656 if (threads != NULL)
3657 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3658 item->offset = offset;
3661 if (!mono_runtime_is_shutting_down ()) {
3662 item->next = thread_static_info.freelist;
3663 thread_static_info.freelist = item;
3665 /* We could be called during shutdown after mono_thread_cleanup () is called */
3669 /* FIXME: free context static data as well */
3674 do_free_special (gpointer key, gpointer value, gpointer data)
3676 MonoClassField *field = key;
3677 guint32 offset = GPOINTER_TO_UINT (value);
3680 size = mono_type_size (field->type, &align);
3681 do_free_special_slot (offset, size);
3685 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3687 mono_threads_lock ();
3688 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3689 mono_threads_unlock ();
3693 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3695 mono_threads_lock ();
3696 do_free_special_slot (offset, size);
3697 mono_threads_unlock ();
3701 * allocates room in the thread local area for storing an instance of the struct type
3702 * the allocation is kept track of in domain->tlsrec_list.
3705 mono_thread_alloc_tls (MonoReflectionType *type)
3707 MonoDomain *domain = mono_domain_get ();
3709 MonoTlsDataRecord *tlsrec;
3712 gsize default_bitmap [4] = {0};
3713 uint32_t tls_offset;
3717 klass = mono_class_from_mono_type (type->type);
3718 /* TlsDatum is a struct, so we subtract the object header size offset */
3719 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3720 size = mono_type_size (type->type, &align);
3721 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, bitmap, max_set);
3722 if (bitmap != default_bitmap)
3724 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3725 tlsrec->tls_offset = tls_offset;
3726 tlsrec->size = size;
3727 mono_domain_lock (domain);
3728 tlsrec->next = domain->tlsrec_list;
3729 domain->tlsrec_list = tlsrec;
3730 mono_domain_unlock (domain);
3735 mono_thread_destroy_tls (uint32_t tls_offset)
3737 MonoTlsDataRecord *prev = NULL;
3738 MonoTlsDataRecord *cur;
3740 MonoDomain *domain = mono_domain_get ();
3741 mono_domain_lock (domain);
3742 cur = domain->tlsrec_list;
3744 if (cur->tls_offset == tls_offset) {
3746 prev->next = cur->next;
3748 domain->tlsrec_list = cur->next;
3756 mono_domain_unlock (domain);
3758 mono_special_static_data_free_slot (tls_offset, size);
3762 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3765 mono_thread_destroy_domain_tls (MonoDomain *domain)
3767 while (domain->tlsrec_list)
3768 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3771 static MonoClassField *local_slots = NULL;
3774 /* local tls data to get locals_slot from a thread */
3777 /* index in the locals_slot array */
3782 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3784 LocalSlotID *sid = user_data;
3785 MonoInternalThread *thread = (MonoInternalThread*)value;
3786 MonoArray *slots_array;
3788 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3789 * it is for the right domain, so we need to check if it is allocated an initialized
3790 * for the current thread.
3792 /*g_print ("handling thread %p\n", thread);*/
3793 if (!thread->static_data || !thread->static_data [sid->idx])
3795 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3796 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3798 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3802 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3810 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3812 g_warning ("local_slots field not found in Thread class");
3816 domain = mono_domain_get ();
3817 mono_domain_lock (domain);
3818 if (domain->special_static_fields)
3819 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3820 mono_domain_unlock (domain);
3823 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3824 sid.offset = GPOINTER_TO_UINT (addr);
3825 sid.offset &= 0x7fffffff;
3826 sid.idx = (sid.offset >> 24) - 1;
3827 mono_threads_lock ();
3828 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3829 mono_threads_unlock ();
3831 /* FIXME: clear the slot for MonoAppContexts, too */
3836 static void CALLBACK dummy_apc (ULONG_PTR param)
3840 static guint32 dummy_apc (gpointer param)
3847 * mono_thread_execute_interruption
3849 * Performs the operation that the requested thread state requires (abort,
3852 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
3854 ensure_synch_cs_set (thread);
3856 EnterCriticalSection (thread->synch_cs);
3858 /* MonoThread::interruption_requested can only be changed with atomics */
3859 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
3860 /* this will consume pending APC calls */
3861 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
3862 InterlockedDecrement (&thread_interruption_requested);
3864 /* Clear the interrupted flag of the thread so it can wait again */
3865 wapi_clear_interruption ();
3869 if ((thread->state & ThreadState_AbortRequested) != 0) {
3870 LeaveCriticalSection (thread->synch_cs);
3871 if (thread->abort_exc == NULL) {
3873 * This might be racy, but it has to be called outside the lock
3874 * since it calls managed code.
3876 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
3878 return thread->abort_exc;
3880 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
3881 thread->state &= ~ThreadState_SuspendRequested;
3882 thread->state |= ThreadState_Suspended;
3883 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3884 if (thread->suspend_event == NULL) {
3885 LeaveCriticalSection (thread->synch_cs);
3888 if (thread->suspended_event)
3889 SetEvent (thread->suspended_event);
3891 LeaveCriticalSection (thread->synch_cs);
3893 if (shutting_down) {
3894 /* After we left the lock, the runtime might shut down so everything becomes invalid */
3899 WaitForSingleObject (thread->suspend_event, INFINITE);
3901 EnterCriticalSection (thread->synch_cs);
3903 CloseHandle (thread->suspend_event);
3904 thread->suspend_event = NULL;
3905 thread->state &= ~ThreadState_Suspended;
3907 /* The thread that requested the resume will have replaced this event
3908 * and will be waiting for it
3910 SetEvent (thread->resume_event);
3912 LeaveCriticalSection (thread->synch_cs);
3916 else if ((thread->state & ThreadState_StopRequested) != 0) {
3917 /* FIXME: do this through the JIT? */
3919 LeaveCriticalSection (thread->synch_cs);
3921 mono_thread_exit ();
3923 } else if (thread->thread_interrupt_requested) {
3925 thread->thread_interrupt_requested = FALSE;
3926 LeaveCriticalSection (thread->synch_cs);
3928 return(mono_get_exception_thread_interrupted ());
3931 LeaveCriticalSection (thread->synch_cs);
3937 * mono_thread_request_interruption
3939 * A signal handler can call this method to request the interruption of a
3940 * thread. The result of the interruption will depend on the current state of
3941 * the thread. If the result is an exception that needs to be throw, it is
3942 * provided as return value.
3945 mono_thread_request_interruption (gboolean running_managed)
3947 MonoInternalThread *thread = mono_thread_internal_current ();
3949 /* The thread may already be stopping */
3954 if (thread->interrupt_on_stop &&
3955 thread->state & ThreadState_StopRequested &&
3956 thread->state & ThreadState_Background)
3960 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
3963 if (!running_managed || is_running_protected_wrapper ()) {
3964 /* Can't stop while in unmanaged code. Increase the global interruption
3965 request count. When exiting the unmanaged method the count will be
3966 checked and the thread will be interrupted. */
3968 InterlockedIncrement (&thread_interruption_requested);
3970 if (mono_thread_notify_pending_exc_fn && !running_managed)
3971 /* The JIT will notify the thread about the interruption */
3972 /* This shouldn't take any locks */
3973 mono_thread_notify_pending_exc_fn ();
3975 /* this will awake the thread if it is in WaitForSingleObject
3977 /* Our implementation of this function ignores the func argument */
3978 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
3982 return mono_thread_execute_interruption (thread);
3986 /*This function should be called by a thread after it has exited all of
3987 * its handle blocks at interruption time.*/
3989 mono_thread_resume_interruption (void)
3991 MonoInternalThread *thread = mono_thread_internal_current ();
3992 gboolean still_aborting;
3994 /* The thread may already be stopping */
3998 ensure_synch_cs_set (thread);
3999 EnterCriticalSection (thread->synch_cs);
4000 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4001 LeaveCriticalSection (thread->synch_cs);
4003 /*This can happen if the protected block called Thread::ResetAbort*/
4004 if (!still_aborting)
4007 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4009 InterlockedIncrement (&thread_interruption_requested);
4012 wapi_self_interrupt ();
4014 return mono_thread_execute_interruption (thread);
4017 gboolean mono_thread_interruption_requested ()
4019 if (thread_interruption_requested) {
4020 MonoInternalThread *thread = mono_thread_internal_current ();
4021 /* The thread may already be stopping */
4023 return (thread->interruption_requested);
4028 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4030 MonoInternalThread *thread = mono_thread_internal_current ();
4032 /* The thread may already be stopping */
4036 mono_debugger_check_interruption ();
4038 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4039 MonoException* exc = mono_thread_execute_interruption (thread);
4040 if (exc) mono_raise_exception (exc);
4045 * Performs the interruption of the current thread, if one has been requested,
4046 * and the thread is not running a protected wrapper.
4048 void mono_thread_interruption_checkpoint ()
4050 mono_thread_interruption_checkpoint_request (FALSE);
4054 * Performs the interruption of the current thread, if one has been requested.
4056 void mono_thread_force_interruption_checkpoint ()
4058 mono_thread_interruption_checkpoint_request (TRUE);
4062 * mono_thread_get_and_clear_pending_exception:
4064 * Return any pending exceptions for the current thread and clear it as a side effect.
4067 mono_thread_get_and_clear_pending_exception (void)
4069 MonoInternalThread *thread = mono_thread_internal_current ();
4071 /* The thread may already be stopping */
4075 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4076 return mono_thread_execute_interruption (thread);
4079 if (thread->pending_exception) {
4080 MonoException *exc = thread->pending_exception;
4082 thread->pending_exception = NULL;
4090 * mono_set_pending_exception:
4092 * Set the pending exception of the current thread to EXC. On platforms which
4093 * support it, the exception will be thrown when execution returns to managed code.
4094 * On other platforms, this function is equivalent to mono_raise_exception ().
4095 * Internal calls which report exceptions using this function instead of
4096 * raise_exception () might be called by JITted code using a more efficient calling
4100 mono_set_pending_exception (MonoException *exc)
4102 MonoInternalThread *thread = mono_thread_internal_current ();
4104 /* The thread may already be stopping */
4108 if (mono_thread_notify_pending_exc_fn) {
4109 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4111 mono_thread_notify_pending_exc_fn ();
4113 /* No way to notify the JIT about the exception, have to throw it now */
4114 mono_raise_exception (exc);
4119 * mono_thread_interruption_request_flag:
4121 * Returns the address of a flag that will be non-zero if an interruption has
4122 * been requested for a thread. The thread to interrupt may not be the current
4123 * thread, so an additional call to mono_thread_interruption_requested() or
4124 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4127 gint32* mono_thread_interruption_request_flag ()
4129 return &thread_interruption_requested;
4133 mono_thread_init_apartment_state (void)
4136 MonoInternalThread* thread = mono_thread_internal_current ();
4138 /* Positive return value indicates success, either
4139 * S_OK if this is first CoInitialize call, or
4140 * S_FALSE if CoInitialize already called, but with same
4141 * threading model. A negative value indicates failure,
4142 * probably due to trying to change the threading model.
4144 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4145 ? COINIT_APARTMENTTHREADED
4146 : COINIT_MULTITHREADED) < 0) {
4147 thread->apartment_state = ThreadApartmentState_Unknown;
4153 mono_thread_cleanup_apartment_state (void)
4156 MonoInternalThread* thread = mono_thread_internal_current ();
4158 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4165 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4167 ensure_synch_cs_set (thread);
4169 EnterCriticalSection (thread->synch_cs);
4170 thread->state |= state;
4171 LeaveCriticalSection (thread->synch_cs);
4175 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4177 ensure_synch_cs_set (thread);
4179 EnterCriticalSection (thread->synch_cs);
4180 thread->state &= ~state;
4181 LeaveCriticalSection (thread->synch_cs);
4185 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4187 gboolean ret = FALSE;
4189 ensure_synch_cs_set (thread);
4191 EnterCriticalSection (thread->synch_cs);
4193 if ((thread->state & test) != 0) {
4197 LeaveCriticalSection (thread->synch_cs);
4202 static MonoClassField *execution_context_field;
4205 get_execution_context_addr (void)
4207 MonoDomain *domain = mono_domain_get ();
4210 if (!execution_context_field) {
4211 execution_context_field = mono_class_get_field_from_name (mono_defaults.thread_class,
4213 g_assert (execution_context_field);
4216 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4218 mono_domain_lock (domain);
4219 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, execution_context_field));
4220 mono_domain_unlock (domain);
4223 return (MonoObject**) mono_get_special_static_data (offset);
4227 mono_thread_get_execution_context (void)
4229 return *get_execution_context_addr ();
4233 mono_thread_set_execution_context (MonoObject *ec)
4235 *get_execution_context_addr () = ec;
4238 static gboolean has_tls_get = FALSE;
4241 mono_runtime_set_has_tls_get (gboolean val)
4247 mono_runtime_has_tls_get (void)
4253 mono_thread_kill (MonoInternalThread *thread, int signal)
4256 /* Win32 uses QueueUserAPC and callers of this are guarded */
4257 g_assert_not_reached ();
4259 # ifdef PTHREAD_POINTER_ID
4260 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4262 # ifdef PLATFORM_ANDROID
4263 if (thread->android_tid != 0) {
4265 int old_errno = errno;
4267 ret = tkill ((pid_t) thread->android_tid, signal);
4276 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4278 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());