2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
19 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threadpool.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internal.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
45 #include <mono/metadata/gc-internal.h>
51 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
52 #define USE_TKILL_ON_ANDROID 1
55 #ifdef PLATFORM_ANDROID
58 #ifdef USE_TKILL_ON_ANDROID
59 extern int tkill (pid_t tid, int signal);
63 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
64 #define THREAD_DEBUG(a)
65 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
66 #define THREAD_WAIT_DEBUG(a)
67 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
68 #define LIBGC_DEBUG(a)
70 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
71 #define SPIN_LOCK(i) do { \
72 if (SPIN_TRYLOCK (i)) \
76 #define SPIN_UNLOCK(i) i = 0
78 #define LOCK_THREAD(thread) lock_thread((thread))
79 #define UNLOCK_THREAD(thread) unlock_thread((thread))
81 /* Provide this for systems with glib < 2.6 */
82 #ifndef G_GSIZE_FORMAT
83 # if GLIB_SIZEOF_LONG == 8
84 # define G_GSIZE_FORMAT "lu"
86 # define G_GSIZE_FORMAT "u"
92 guint32 (*func)(void *);
108 typedef struct _StaticDataFreeList StaticDataFreeList;
109 struct _StaticDataFreeList {
110 StaticDataFreeList *next;
118 StaticDataFreeList *freelist;
121 /* Number of cached culture objects in the MonoThread->cached_culture_info array
122 * (per-type): we use the first NUM entries for CultureInfo and the last for
123 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
125 #define NUM_CACHED_CULTURES 4
126 #define CULTURES_START_IDX 0
127 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
129 /* Controls access to the 'threads' hash table */
130 static void mono_threads_lock (void);
131 static void mono_threads_unlock (void);
132 static mono_mutex_t threads_mutex;
134 /* Controls access to the 'joinable_threads' hash table */
135 #define joinable_threads_lock() mono_mutex_lock (&joinable_threads_mutex)
136 #define joinable_threads_unlock() mono_mutex_unlock (&joinable_threads_mutex)
137 static mono_mutex_t joinable_threads_mutex;
139 /* Holds current status of static data heap */
140 static StaticDataInfo thread_static_info;
141 static StaticDataInfo context_static_info;
143 /* The hash of existing threads (key is thread ID, value is
144 * MonoInternalThread*) that need joining before exit
146 static MonoGHashTable *threads=NULL;
148 /* List of app context GC handles.
149 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
151 static GHashTable *contexts = NULL;
154 * Threads which are starting up and they are not in the 'threads' hash yet.
155 * When handle_store is called for a thread, it will be removed from this hash table.
156 * Protected by mono_threads_lock ().
158 static MonoGHashTable *threads_starting_up = NULL;
160 /* Maps a MonoThread to its start argument */
161 /* Protected by mono_threads_lock () */
162 static MonoGHashTable *thread_start_args = NULL;
164 /* The TLS key that holds the MonoObject assigned to each thread */
165 static MonoNativeTlsKey current_object_key;
168 /* Protected by the threads lock */
169 static GHashTable *joinable_threads;
170 static int joinable_thread_count;
172 #ifdef MONO_HAVE_FAST_TLS
173 /* we need to use both the Tls* functions and __thread because
174 * the gc needs to see all the threads
176 MONO_FAST_TLS_DECLARE(tls_current_object);
177 #define SET_CURRENT_OBJECT(x) do { \
178 MONO_FAST_TLS_SET (tls_current_object, x); \
179 mono_native_tls_set_value (current_object_key, x); \
181 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
183 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
184 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
187 /* function called at thread start */
188 static MonoThreadStartCB mono_thread_start_cb = NULL;
190 /* function called at thread attach */
191 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
193 /* function called at thread cleanup */
194 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
196 /* function called to notify the runtime about a pending exception on the current thread */
197 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
199 /* The default stack size for each thread */
200 static guint32 default_stacksize = 0;
201 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
203 static void thread_adjust_static_data (MonoInternalThread *thread);
204 static void context_adjust_static_data (MonoAppContext *ctx);
205 static void mono_free_static_data (gpointer* static_data);
206 static void mono_init_static_data_info (StaticDataInfo *static_data);
207 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
208 static gboolean mono_thread_resume (MonoInternalThread* thread);
209 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
210 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
211 static void self_suspend_internal (MonoInternalThread *thread);
212 static gboolean resume_thread_internal (MonoInternalThread *thread);
214 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
215 static void ref_stack_destroy (gpointer rs);
217 /* Spin lock for InterlockedXXX 64 bit functions */
218 #define mono_interlocked_lock() mono_mutex_lock (&interlocked_mutex)
219 #define mono_interlocked_unlock() mono_mutex_unlock (&interlocked_mutex)
220 static mono_mutex_t interlocked_mutex;
222 /* global count of thread interruptions requested */
223 static gint32 thread_interruption_requested = 0;
225 /* Event signaled when a thread changes its background mode */
226 static HANDLE background_change_event;
228 static gboolean shutting_down = FALSE;
230 static gint32 managed_thread_id_counter = 0;
234 mono_threads_lock (void)
237 mono_locks_acquire (&threads_mutex, ThreadsLock);
238 MONO_FINISH_TRY_BLOCKING
242 mono_threads_unlock (void)
244 mono_locks_release (&threads_mutex, ThreadsLock);
249 get_next_managed_thread_id (void)
251 return InterlockedIncrement (&managed_thread_id_counter);
255 mono_thread_get_tls_key (void)
257 return current_object_key;
261 mono_thread_get_tls_offset (void)
264 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
268 static inline MonoNativeThreadId
269 thread_get_tid (MonoInternalThread *thread)
271 /* We store the tid as a guint64 to keep the object layout constant between platforms */
272 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
275 /* handle_store() and handle_remove() manage the array of threads that
276 * still need to be waited for when the main thread exits.
278 * If handle_store() returns FALSE the thread must not be started
279 * because Mono is shutting down.
281 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
283 mono_threads_lock ();
285 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
287 if (threads_starting_up)
288 mono_g_hash_table_remove (threads_starting_up, thread);
290 if (shutting_down && !force_attach) {
291 mono_threads_unlock ();
296 MONO_GC_REGISTER_ROOT_FIXED (threads);
297 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
300 /* We don't need to duplicate thread->handle, because it is
301 * only closed when the thread object is finalized by the GC.
303 g_assert (thread->internal_thread);
304 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
305 thread->internal_thread);
307 mono_threads_unlock ();
312 static gboolean handle_remove(MonoInternalThread *thread)
315 gsize tid = thread->tid;
317 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
319 mono_threads_lock ();
322 /* We have to check whether the thread object for the
323 * tid is still the same in the table because the
324 * thread might have been destroyed and the tid reused
325 * in the meantime, in which case the tid would be in
326 * the table, but with another thread object.
328 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
329 mono_g_hash_table_remove (threads, (gpointer)tid);
338 mono_threads_unlock ();
340 /* Don't close the handle here, wait for the object finalizer
341 * to do it. Otherwise, the following race condition applies:
343 * 1) Thread exits (and handle_remove() closes the handle)
345 * 2) Some other handle is reassigned the same slot
347 * 3) Another thread tries to join the first thread, and
348 * blocks waiting for the reassigned handle to be signalled
349 * (which might never happen). This is possible, because the
350 * thread calling Join() still has a reference to the first
356 static void ensure_synch_cs_set (MonoInternalThread *thread)
358 mono_mutex_t *synch_cs;
360 if (thread->synch_cs != NULL) {
364 synch_cs = g_new0 (mono_mutex_t, 1);
365 mono_mutex_init_recursive (synch_cs);
367 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
368 synch_cs, NULL) != NULL) {
369 /* Another thread must have installed this CS */
370 mono_mutex_destroy (synch_cs);
376 lock_thread (MonoInternalThread *thread)
378 if (!thread->synch_cs)
379 ensure_synch_cs_set (thread);
381 g_assert (thread->synch_cs);
384 mono_mutex_lock (thread->synch_cs);
385 MONO_FINISH_TRY_BLOCKING
389 unlock_thread (MonoInternalThread *thread)
391 mono_mutex_unlock (thread->synch_cs);
395 * NOTE: this function can be called also for threads different from the current one:
396 * make sure no code called from it will ever assume it is run on the thread that is
397 * getting cleaned up.
399 static void thread_cleanup (MonoInternalThread *thread)
401 g_assert (thread != NULL);
403 if (thread->abort_state_handle) {
404 mono_gchandle_free (thread->abort_state_handle);
405 thread->abort_state_handle = 0;
407 thread->abort_exc = NULL;
408 thread->current_appcontext = NULL;
411 * This is necessary because otherwise we might have
412 * cross-domain references which will not get cleaned up when
413 * the target domain is unloaded.
415 if (thread->cached_culture_info) {
417 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
418 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
422 * thread->synch_cs can be NULL if this was called after
423 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
424 * This can happen only during shutdown.
425 * The shutting_down flag is not always set, so we can't assert on it.
427 if (thread->synch_cs)
428 LOCK_THREAD (thread);
430 thread->state |= ThreadState_Stopped;
431 thread->state &= ~ThreadState_Background;
433 if (thread->synch_cs)
434 UNLOCK_THREAD (thread);
437 An interruption request has leaked to cleanup. Adjust the global counter.
439 This can happen is the abort source thread finds the abortee (this) thread
440 in unmanaged code. If this thread never trips back to managed code or check
441 the local flag it will be left set and positively unbalance the global counter.
443 Leaving the counter unbalanced will cause a performance degradation since all threads
444 will now keep checking their local flags all the time.
446 if (InterlockedExchange (&thread->interruption_requested, 0))
447 InterlockedDecrement (&thread_interruption_requested);
449 /* if the thread is not in the hash it has been removed already */
450 if (!handle_remove (thread)) {
451 if (thread == mono_thread_internal_current ()) {
452 mono_domain_unset ();
453 mono_memory_barrier ();
455 /* This needs to be called even if handle_remove () fails */
456 if (mono_thread_cleanup_fn)
457 mono_thread_cleanup_fn ((MonoNativeThreadId)thread->tid);
460 mono_release_type_locks (thread);
462 mono_profiler_thread_end (thread->tid);
464 if (thread == mono_thread_internal_current ()) {
466 * This will signal async signal handlers that the thread has exited.
467 * The profiler callback needs this to be set, so it cannot be done earlier.
469 mono_domain_unset ();
470 mono_memory_barrier ();
473 if (thread == mono_thread_internal_current ())
474 mono_thread_pop_appdomain_ref ();
476 thread->cached_culture_info = NULL;
478 mono_free_static_data (thread->static_data);
479 thread->static_data = NULL;
480 ref_stack_destroy (thread->appdomain_refs);
481 thread->appdomain_refs = NULL;
483 if (mono_thread_cleanup_fn)
484 mono_thread_cleanup_fn ((MonoNativeThreadId)thread->tid);
486 if (mono_gc_is_moving ()) {
487 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
488 thread->thread_pinning_ref = NULL;
493 * A special static data offset (guint32) consists of 3 parts:
495 * [0] 6-bit index into the array of chunks.
496 * [6] 25-bit offset into the array.
497 * [31] Bit indicating thread or context static.
502 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
513 } SpecialStaticOffset;
515 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
516 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
518 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
519 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
520 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
521 (((SpecialStaticOffset *) &(x))->fields.f)
524 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
526 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
528 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
529 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
531 return ((char *) thread->static_data [idx]) + off;
535 get_context_static_data (MonoAppContext *ctx, guint32 offset)
537 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
539 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
540 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
542 return ((char *) ctx->static_data [idx]) + off;
546 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
548 static MonoClassField *current_thread_field = NULL;
552 if (!current_thread_field) {
553 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
554 g_assert (current_thread_field);
557 mono_class_vtable (domain, mono_defaults.thread_class);
558 mono_domain_lock (domain);
559 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
560 mono_domain_unlock (domain);
563 return get_thread_static_data (thread, offset);
567 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
569 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
571 g_assert (current->obj.vtable->domain == domain);
573 g_assert (!*current_thread_ptr);
574 *current_thread_ptr = current;
578 create_thread_object (MonoDomain *domain)
580 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
581 return (MonoThread*)mono_gc_alloc_mature (vt);
585 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
587 MonoThread *thread = create_thread_object (domain);
588 MONO_OBJECT_SETREF (thread, internal_thread, internal);
592 static MonoInternalThread*
593 create_internal_thread (void)
595 MonoInternalThread *thread;
598 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
599 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
601 thread->synch_cs = g_new0 (mono_mutex_t, 1);
602 mono_mutex_init_recursive (thread->synch_cs);
604 thread->apartment_state = ThreadApartmentState_Unknown;
605 thread->managed_id = get_next_managed_thread_id ();
606 if (mono_gc_is_moving ()) {
607 thread->thread_pinning_ref = thread;
608 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
615 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
617 MonoDomain *domain = mono_get_root_domain ();
619 if (!candidate || candidate->obj.vtable->domain != domain)
620 candidate = new_thread_with_internal (domain, thread);
621 set_current_thread_for_domain (domain, thread, candidate);
622 g_assert (!thread->root_domain_thread);
623 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
626 static guint32 WINAPI start_wrapper_internal(void *data)
628 MonoThreadInfo *info;
629 StartInfo *start_info = (StartInfo *)data;
630 guint32 (*start_func)(void *);
634 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
637 MonoInternalThread *internal = start_info->obj->internal_thread;
638 MonoObject *start_delegate = start_info->delegate;
639 MonoDomain *domain = start_info->obj->obj.vtable->domain;
641 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
643 /* We can be sure start_info->obj->tid and
644 * start_info->obj->handle have been set, because the thread
645 * was created suspended, and these values were set before the
649 info = mono_thread_info_current ();
651 internal->thread_info = info;
652 internal->small_id = info->small_id;
656 SET_CURRENT_OBJECT (internal);
658 /* Every thread references the appdomain which created it */
659 mono_thread_push_appdomain_ref (domain);
661 if (!mono_domain_set (domain, FALSE)) {
662 /* No point in raising an appdomain_unloaded exception here */
663 /* FIXME: Cleanup here */
664 mono_thread_pop_appdomain_ref ();
668 start_func = start_info->func;
669 start_arg = start_info->start_arg;
671 /* We have to do this here because mono_thread_new_init()
672 requires that root_domain_thread is set up. */
673 thread_adjust_static_data (internal);
674 init_root_domain_thread (internal, start_info->obj);
676 /* This MUST be called before any managed code can be
677 * executed, as it calls the callback function that (for the
678 * jit) sets the lmf marker.
680 mono_thread_new_init (tid, &tid, start_func);
681 internal->stack_ptr = &tid;
683 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
685 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
687 /* On 2.0 profile (and higher), set explicitly since state might have been
689 if (internal->apartment_state == ThreadApartmentState_Unknown)
690 internal->apartment_state = ThreadApartmentState_MTA;
692 mono_thread_init_apartment_state ();
694 if(internal->start_notify!=NULL) {
695 /* Let the thread that called Start() know we're
698 ReleaseSemaphore (internal->start_notify, 1, NULL);
701 mono_threads_lock ();
702 mono_g_hash_table_remove (thread_start_args, start_info->obj);
703 mono_threads_unlock ();
706 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
710 * Call this after calling start_notify, since the profiler callback might want
711 * to lock the thread, and the lock is held by thread_start () which waits for
714 mono_profiler_thread_start (tid);
716 /* if the name was set before starting, we didn't invoke the profiler callback */
717 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
718 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
719 mono_profiler_thread_name (internal->tid, tname);
722 /* start_func is set only for unmanaged start functions */
724 start_func (start_arg);
727 g_assert (start_delegate != NULL);
728 args [0] = start_arg;
729 /* we may want to handle the exception here. See comment below on unhandled exceptions */
730 mono_runtime_delegate_invoke (start_delegate, args, NULL);
733 /* If the thread calls ExitThread at all, this remaining code
734 * will not be executed, but the main thread will eventually
735 * call thread_cleanup() on this thread's behalf.
738 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
740 /* Do any cleanup needed for apartment state. This
741 * cannot be done in thread_cleanup since thread_cleanup could be
742 * called for a thread other than the current thread.
743 * mono_thread_cleanup_apartment_state cleans up apartment
744 * for the current thead */
745 mono_thread_cleanup_apartment_state ();
747 thread_cleanup (internal);
751 /* Remove the reference to the thread object in the TLS data,
752 * so the thread object can be finalized. This won't be
753 * reached if the thread threw an uncaught exception, so those
754 * thread handles will stay referenced :-( (This is due to
755 * missing support for scanning thread-specific data in the
756 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
759 SET_CURRENT_OBJECT (NULL);
764 static guint32 WINAPI start_wrapper(void *data)
768 /* Avoid scanning the frames above this frame during a GC */
769 mono_gc_set_stack_end ((void*)&dummy);
771 return start_wrapper_internal (data);
777 * Common thread creation code.
778 * LOCKING: Acquires the threads lock.
781 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
782 gboolean throw_on_failure)
784 HANDLE thread_handle;
785 MonoNativeThreadId tid;
786 guint32 create_flags;
789 * Join joinable threads to prevent running out of threads since the finalizer
790 * thread might be blocked/backlogged.
792 mono_threads_join_threads ();
794 mono_threads_lock ();
797 mono_threads_unlock ();
801 * The thread start argument may be an object reference, and there is
802 * no ref to keep it alive when the new thread is started but not yet
803 * registered with the collector. So we store it in a GC tracked hash
806 if (thread_start_args == NULL) {
807 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
808 thread_start_args = mono_g_hash_table_new (NULL, NULL);
810 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
811 if (threads_starting_up == NULL) {
812 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
813 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
815 mono_g_hash_table_insert (threads_starting_up, thread, thread);
816 mono_threads_unlock ();
818 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
819 if (!internal->start_notify) {
820 mono_threads_lock ();
821 mono_g_hash_table_remove (threads_starting_up, thread);
822 mono_threads_unlock ();
823 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
829 stack_size = default_stacksize_for_thread (internal);
831 /* Create suspended, so we can do some housekeeping before the thread
834 create_flags = CREATE_SUSPENDED;
836 MONO_PREPARE_BLOCKING
837 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
838 stack_size, create_flags, &tid);
841 if (thread_handle == NULL) {
842 /* The thread couldn't be created, so throw an exception */
843 mono_threads_lock ();
844 mono_g_hash_table_remove (threads_starting_up, thread);
845 mono_threads_unlock ();
847 if (throw_on_failure)
848 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
850 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
853 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
855 internal->handle = thread_handle;
856 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
858 internal->threadpool_thread = threadpool_thread;
859 if (threadpool_thread)
860 mono_thread_set_state (internal, ThreadState_Background);
862 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
864 /* Only store the handle when the thread is about to be
865 * launched, to avoid the main thread deadlocking while trying
866 * to clean up a thread that will never be signalled.
868 if (!handle_store (thread, FALSE))
871 MONO_PREPARE_BLOCKING
872 mono_thread_info_resume (tid);
875 if (internal->start_notify) {
877 * Wait for the thread to set up its TLS data etc, so
878 * theres no potential race condition if someone tries
879 * to look up the data believing the thread has
882 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
884 MONO_PREPARE_BLOCKING
885 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
888 CloseHandle (internal->start_notify);
889 internal->start_notify = NULL;
892 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
897 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
899 if (mono_thread_start_cb) {
900 mono_thread_start_cb (tid, stack_start, func);
904 void mono_threads_set_default_stacksize (guint32 stacksize)
906 default_stacksize = stacksize;
909 guint32 mono_threads_get_default_stacksize (void)
911 return default_stacksize;
915 * mono_thread_create_internal:
919 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
922 MonoInternalThread *internal;
923 StartInfo *start_info;
926 thread = create_thread_object (domain);
927 internal = create_internal_thread ();
928 MONO_OBJECT_SETREF (thread, internal_thread, internal);
930 start_info = g_new0 (StartInfo, 1);
931 start_info->func = func;
932 start_info->obj = thread;
933 start_info->start_arg = arg;
935 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
939 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
940 if (mono_check_corlib_version () == NULL)
941 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
947 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
949 mono_thread_create_internal (domain, func, arg, FALSE, 0);
953 mono_thread_attach (MonoDomain *domain)
955 return mono_thread_attach_full (domain, FALSE);
959 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
961 MonoThreadInfo *info;
962 MonoInternalThread *thread;
963 MonoThread *current_thread;
964 HANDLE thread_handle;
967 if ((thread = mono_thread_internal_current ())) {
968 if (domain != mono_domain_get ())
969 mono_domain_set (domain, TRUE);
970 /* Already attached */
971 return mono_thread_current ();
974 if (!mono_gc_register_thread (&domain)) {
975 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 ());
978 thread = create_internal_thread ();
980 thread_handle = mono_thread_info_open_handle ();
981 g_assert (thread_handle);
983 tid=GetCurrentThreadId ();
985 thread->handle=thread_handle;
987 thread->stack_ptr = &tid;
989 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
991 info = mono_thread_info_current ();
993 thread->thread_info = info;
994 thread->small_id = info->small_id;
996 current_thread = new_thread_with_internal (domain, thread);
998 if (!handle_store (current_thread, force_attach)) {
999 /* Mono is shutting down, so just wait for the end */
1004 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
1006 SET_CURRENT_OBJECT (thread);
1007 mono_domain_set (domain, TRUE);
1009 thread_adjust_static_data (thread);
1011 init_root_domain_thread (thread, current_thread);
1012 if (domain != mono_get_root_domain ())
1013 set_current_thread_for_domain (domain, thread, current_thread);
1016 if (mono_thread_attach_cb) {
1020 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1023 mono_thread_attach_cb (tid, &tid);
1025 mono_thread_attach_cb (tid, staddr + stsize);
1028 // FIXME: Need a separate callback
1029 mono_profiler_thread_start (tid);
1031 return current_thread;
1035 mono_thread_detach_internal (MonoInternalThread *thread)
1037 g_return_if_fail (thread != NULL);
1039 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1041 thread_cleanup (thread);
1043 SET_CURRENT_OBJECT (NULL);
1044 mono_domain_unset ();
1046 /* Don't need to CloseHandle this thread, even though we took a
1047 * reference in mono_thread_attach (), because the GC will do it
1048 * when the Thread object is finalised.
1053 mono_thread_detach (MonoThread *thread)
1056 mono_thread_detach_internal (thread->internal_thread);
1060 * mono_thread_detach_if_exiting:
1062 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1063 * This should be used at the end of embedding code which calls into managed code, and which
1064 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1067 mono_thread_detach_if_exiting (void)
1069 if (mono_thread_info_is_exiting ()) {
1070 MonoInternalThread *thread;
1072 thread = mono_thread_internal_current ();
1074 mono_thread_detach_internal (thread);
1075 mono_thread_info_detach ();
1083 MonoInternalThread *thread = mono_thread_internal_current ();
1085 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1087 thread_cleanup (thread);
1088 SET_CURRENT_OBJECT (NULL);
1089 mono_domain_unset ();
1091 /* we could add a callback here for embedders to use. */
1092 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1093 exit (mono_environment_exitcode_get ());
1094 mono_thread_info_exit ();
1098 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1100 MonoInternalThread *internal = create_internal_thread ();
1102 internal->state = ThreadState_Unstarted;
1104 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1108 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
1111 StartInfo *start_info;
1112 MonoInternalThread *internal;
1115 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1117 if (!this->internal_thread)
1118 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1119 internal = this->internal_thread;
1121 LOCK_THREAD (internal);
1123 if ((internal->state & ThreadState_Unstarted) == 0) {
1124 UNLOCK_THREAD (internal);
1125 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1129 if ((internal->state & ThreadState_Aborted) != 0) {
1130 UNLOCK_THREAD (internal);
1133 /* This is freed in start_wrapper */
1134 start_info = g_new0 (StartInfo, 1);
1135 start_info->func = NULL;
1136 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1137 start_info->delegate = start;
1138 start_info->obj = this;
1139 g_assert (this->obj.vtable->domain == mono_domain_get ());
1141 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1143 UNLOCK_THREAD (internal);
1147 internal->state &= ~ThreadState_Unstarted;
1149 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1151 UNLOCK_THREAD (internal);
1152 return internal->handle;
1156 * This is called from the finalizer of the internal thread object.
1159 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1161 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1164 * Since threads keep a reference to their thread object while running, by the time this function is called,
1165 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1166 * when thread_cleanup () can be called after this.
1169 CloseHandle (thread);
1171 if (this->synch_cs) {
1172 mono_mutex_t *synch_cs = this->synch_cs;
1173 this->synch_cs = NULL;
1174 mono_mutex_destroy (synch_cs);
1179 void *name = this->name;
1186 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1189 MonoInternalThread *thread = mono_thread_internal_current ();
1191 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1193 mono_thread_current_check_pending_interrupt ();
1196 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1198 MONO_PREPARE_BLOCKING
1199 res = SleepEx(ms,TRUE);
1200 MONO_FINISH_BLOCKING
1202 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1204 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1205 MonoException* exc = mono_thread_execute_interruption (thread);
1207 mono_raise_exception (exc);
1219 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1224 ves_icall_System_Threading_Thread_GetDomainID (void)
1226 return mono_domain_get()->domain_id;
1230 ves_icall_System_Threading_Thread_Yield (void)
1232 return mono_thread_info_yield ();
1236 * mono_thread_get_name:
1238 * Return the name of the thread. NAME_LEN is set to the length of the name.
1239 * Return NULL if the thread has no name. The returned memory is owned by the
1243 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1247 LOCK_THREAD (this_obj);
1249 if (!this_obj->name) {
1253 *name_len = this_obj->name_len;
1254 res = g_new (gunichar2, this_obj->name_len);
1255 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1258 UNLOCK_THREAD (this_obj);
1264 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1268 LOCK_THREAD (this_obj);
1270 if (!this_obj->name)
1273 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1275 UNLOCK_THREAD (this_obj);
1281 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1283 LOCK_THREAD (this_obj);
1285 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1286 UNLOCK_THREAD (this_obj);
1288 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1291 if (this_obj->name) {
1292 g_free (this_obj->name);
1293 this_obj->name_len = 0;
1296 this_obj->name = g_new (gunichar2, mono_string_length (name));
1297 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1298 this_obj->name_len = mono_string_length (name);
1301 this_obj->name = NULL;
1304 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1306 UNLOCK_THREAD (this_obj);
1308 if (this_obj->name && this_obj->tid) {
1309 char *tname = mono_string_to_utf8 (name);
1310 mono_profiler_thread_name (this_obj->tid, tname);
1311 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1317 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1319 mono_thread_set_name_internal (this_obj, name, TRUE);
1323 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this)
1325 return ThreadPriority_Lowest;
1329 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this, int priority)
1333 /* If the array is already in the requested domain, we just return it,
1334 otherwise we return a copy in that domain. */
1336 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1343 if (mono_object_domain (arr) == domain)
1346 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1347 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1352 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1354 return byte_array_to_domain (arr, mono_get_root_domain ());
1358 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1360 return byte_array_to_domain (arr, mono_domain_get ());
1364 mono_thread_current (void)
1366 MonoDomain *domain = mono_domain_get ();
1367 MonoInternalThread *internal = mono_thread_internal_current ();
1368 MonoThread **current_thread_ptr;
1370 g_assert (internal);
1371 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1373 if (!*current_thread_ptr) {
1374 g_assert (domain != mono_get_root_domain ());
1375 *current_thread_ptr = new_thread_with_internal (domain, internal);
1377 return *current_thread_ptr;
1381 mono_thread_internal_current (void)
1383 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1384 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1389 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this, int ms)
1391 MonoInternalThread *this_obj = this->internal_thread;
1392 HANDLE thread = this_obj->handle;
1393 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1396 mono_thread_current_check_pending_interrupt ();
1398 LOCK_THREAD (this_obj);
1400 if ((this_obj->state & ThreadState_Unstarted) != 0) {
1401 UNLOCK_THREAD (this_obj);
1403 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1407 UNLOCK_THREAD (this_obj);
1412 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1414 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1416 MONO_PREPARE_BLOCKING
1417 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1418 MONO_FINISH_BLOCKING
1420 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1422 if(ret==WAIT_OBJECT_0) {
1423 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1428 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1434 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1442 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1444 MONO_PREPARE_BLOCKING
1446 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1448 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1449 MONO_FINISH_BLOCKING
1451 if (ret != WAIT_IO_COMPLETION)
1454 exc = mono_thread_execute_interruption (thread);
1456 mono_raise_exception (exc);
1461 /* Re-calculate ms according to the time passed */
1462 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1463 if (diff_ms >= ms) {
1467 wait = ms - diff_ms;
1473 /* FIXME: exitContext isnt documented */
1474 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1480 MonoObject *waitHandle;
1481 MonoInternalThread *thread = mono_thread_internal_current ();
1483 /* Do this WaitSleepJoin check before creating objects */
1484 mono_thread_current_check_pending_interrupt ();
1486 /* We fail in managed if the array has more than 64 elements */
1487 numhandles = (guint32)mono_array_length(mono_handles);
1488 handles = g_new0(HANDLE, numhandles);
1490 for(i = 0; i < numhandles; i++) {
1491 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1492 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1499 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1501 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1503 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1507 if(ret==WAIT_FAILED) {
1508 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1510 } else if(ret==WAIT_TIMEOUT) {
1511 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1518 /* FIXME: exitContext isnt documented */
1519 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1521 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1522 uintptr_t numhandles;
1525 MonoObject *waitHandle;
1526 MonoInternalThread *thread = mono_thread_internal_current ();
1528 /* Do this WaitSleepJoin check before creating objects */
1529 mono_thread_current_check_pending_interrupt ();
1531 numhandles = mono_array_length(mono_handles);
1532 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1535 for(i = 0; i < numhandles; i++) {
1536 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1537 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1544 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1546 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1548 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1550 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1553 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1555 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1556 return ret - WAIT_OBJECT_0;
1558 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1559 return ret - WAIT_ABANDONED_0;
1566 /* FIXME: exitContext isnt documented */
1567 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1570 MonoInternalThread *thread = mono_thread_internal_current ();
1572 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1578 mono_thread_current_check_pending_interrupt ();
1580 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1582 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1584 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1586 if(ret==WAIT_FAILED) {
1587 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1589 } else if(ret==WAIT_TIMEOUT) {
1590 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1598 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1601 MonoInternalThread *thread = mono_thread_internal_current ();
1606 mono_thread_current_check_pending_interrupt ();
1608 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1610 MONO_PREPARE_BLOCKING
1611 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1612 MONO_FINISH_BLOCKING
1614 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1616 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1619 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1626 mutex = CreateMutex (NULL, owned, NULL);
1628 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1630 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1638 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1639 return(ReleaseMutex (handle));
1642 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1648 *error = ERROR_SUCCESS;
1650 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1652 *error = GetLastError ();
1659 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1666 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1668 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1669 mono_string_chars (name));
1671 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1679 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1683 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1688 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1692 *error = ERROR_SUCCESS;
1694 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1696 *error = GetLastError ();
1702 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1709 event = CreateEvent (NULL, manual, initial, NULL);
1711 event = CreateEvent (NULL, manual, initial,
1712 mono_string_chars (name));
1714 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1722 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1723 return (SetEvent(handle));
1726 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1727 return (ResetEvent(handle));
1731 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1732 CloseHandle (handle);
1735 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1741 *error = ERROR_SUCCESS;
1743 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1745 *error = GetLastError ();
1751 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1753 return InterlockedIncrement (location);
1756 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1758 #if SIZEOF_VOID_P == 4
1759 if (G_UNLIKELY ((size_t)location & 0x7)) {
1761 mono_interlocked_lock ();
1764 mono_interlocked_unlock ();
1768 return InterlockedIncrement64 (location);
1771 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1773 return InterlockedDecrement(location);
1776 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1778 #if SIZEOF_VOID_P == 4
1779 if (G_UNLIKELY ((size_t)location & 0x7)) {
1781 mono_interlocked_lock ();
1784 mono_interlocked_unlock ();
1788 return InterlockedDecrement64 (location);
1791 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1793 return InterlockedExchange(location, value);
1796 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1799 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1800 mono_gc_wbarrier_generic_nostore (location);
1804 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1806 return InterlockedExchangePointer(location, value);
1809 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1811 IntFloatUnion val, ret;
1814 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1820 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1822 #if SIZEOF_VOID_P == 4
1823 if (G_UNLIKELY ((size_t)location & 0x7)) {
1825 mono_interlocked_lock ();
1828 mono_interlocked_unlock ();
1832 return InterlockedExchange64 (location, value);
1836 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1838 LongDoubleUnion val, ret;
1841 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1846 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1848 return InterlockedCompareExchange(location, value, comparand);
1851 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1853 gint32 r = InterlockedCompareExchange(location, value, comparand);
1854 *success = r == comparand;
1858 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1861 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1862 mono_gc_wbarrier_generic_nostore (location);
1866 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1868 return InterlockedCompareExchangePointer(location, value, comparand);
1871 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1873 IntFloatUnion val, ret, cmp;
1876 cmp.fval = comparand;
1877 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1883 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1885 #if SIZEOF_VOID_P == 8
1886 LongDoubleUnion val, comp, ret;
1889 comp.fval = comparand;
1890 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1896 mono_interlocked_lock ();
1898 if (old == comparand)
1900 mono_interlocked_unlock ();
1907 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1909 #if SIZEOF_VOID_P == 4
1910 if (G_UNLIKELY ((size_t)location & 0x7)) {
1912 mono_interlocked_lock ();
1914 if (old == comparand)
1916 mono_interlocked_unlock ();
1920 return InterlockedCompareExchange64 (location, value, comparand);
1924 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1927 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1928 mono_gc_wbarrier_generic_nostore (location);
1933 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1936 res = InterlockedExchangePointer ((gpointer *)location, value);
1937 mono_gc_wbarrier_generic_nostore (location);
1942 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1944 return InterlockedAdd (location, value);
1948 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1950 #if SIZEOF_VOID_P == 4
1951 if (G_UNLIKELY ((size_t)location & 0x7)) {
1953 mono_interlocked_lock ();
1956 mono_interlocked_unlock ();
1960 return InterlockedAdd64 (location, value);
1964 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1966 #if SIZEOF_VOID_P == 4
1967 if (G_UNLIKELY ((size_t)location & 0x7)) {
1969 mono_interlocked_lock ();
1971 mono_interlocked_unlock ();
1975 return InterlockedRead64 (location);
1979 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1981 mono_memory_barrier ();
1985 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1987 mono_thread_clr_state (this, state);
1989 if (state & ThreadState_Background) {
1990 /* If the thread changes the background mode, the main thread has to
1991 * be notified, since it has to rebuild the list of threads to
1994 SetEvent (background_change_event);
1999 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2001 mono_thread_set_state (this, state);
2003 if (state & ThreadState_Background) {
2004 /* If the thread changes the background mode, the main thread has to
2005 * be notified, since it has to rebuild the list of threads to
2008 SetEvent (background_change_event);
2013 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2019 state = this->state;
2021 UNLOCK_THREAD (this);
2026 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this)
2028 MonoInternalThread *current;
2030 MonoInternalThread *this_obj = this->internal_thread;
2032 LOCK_THREAD (this_obj);
2034 current = mono_thread_internal_current ();
2036 this_obj->thread_interrupt_requested = TRUE;
2037 throw = current != this_obj && (this_obj->state & ThreadState_WaitSleepJoin);
2039 UNLOCK_THREAD (this_obj);
2042 abort_thread_internal (this_obj, TRUE, FALSE);
2046 void mono_thread_current_check_pending_interrupt ()
2048 MonoInternalThread *thread = mono_thread_internal_current ();
2049 gboolean throw = FALSE;
2051 LOCK_THREAD (thread);
2053 if (thread->thread_interrupt_requested) {
2055 thread->thread_interrupt_requested = FALSE;
2058 UNLOCK_THREAD (thread);
2061 mono_raise_exception (mono_get_exception_thread_interrupted ());
2066 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2068 LOCK_THREAD (thread);
2070 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2071 (thread->state & ThreadState_StopRequested) != 0 ||
2072 (thread->state & ThreadState_Stopped) != 0)
2074 UNLOCK_THREAD (thread);
2078 if ((thread->state & ThreadState_Unstarted) != 0) {
2079 thread->state |= ThreadState_Aborted;
2080 UNLOCK_THREAD (thread);
2084 thread->state |= ThreadState_AbortRequested;
2085 if (thread->abort_state_handle)
2086 mono_gchandle_free (thread->abort_state_handle);
2088 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2089 g_assert (thread->abort_state_handle);
2091 thread->abort_state_handle = 0;
2093 thread->abort_exc = NULL;
2095 UNLOCK_THREAD (thread);
2097 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2099 /* During shutdown, we can't wait for other threads */
2101 /* Make sure the thread is awake */
2102 mono_thread_resume (thread);
2104 abort_thread_internal (thread, TRUE, TRUE);
2108 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this)
2110 MonoInternalThread *thread = mono_thread_internal_current ();
2111 gboolean was_aborting;
2113 LOCK_THREAD (thread);
2114 was_aborting = thread->state & ThreadState_AbortRequested;
2115 thread->state &= ~ThreadState_AbortRequested;
2116 UNLOCK_THREAD (thread);
2118 if (!was_aborting) {
2119 const char *msg = "Unable to reset abort because no abort was requested";
2120 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2123 thread->abort_exc = NULL;
2124 if (thread->abort_state_handle) {
2125 mono_gchandle_free (thread->abort_state_handle);
2126 /* This is actually not necessary - the handle
2127 only counts if the exception is set */
2128 thread->abort_state_handle = 0;
2133 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2135 LOCK_THREAD (thread);
2137 thread->state &= ~ThreadState_AbortRequested;
2139 if (thread->abort_exc) {
2140 thread->abort_exc = NULL;
2141 if (thread->abort_state_handle) {
2142 mono_gchandle_free (thread->abort_state_handle);
2143 /* This is actually not necessary - the handle
2144 only counts if the exception is set */
2145 thread->abort_state_handle = 0;
2149 UNLOCK_THREAD (thread);
2153 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2155 MonoInternalThread *thread = this->internal_thread;
2156 MonoObject *state, *deserialized = NULL, *exc;
2159 if (!thread->abort_state_handle)
2162 state = mono_gchandle_get_target (thread->abort_state_handle);
2165 domain = mono_domain_get ();
2166 if (mono_object_domain (state) == domain)
2169 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2171 if (!deserialized) {
2172 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2174 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2175 mono_set_pending_exception (invalid_op_exc);
2179 return deserialized;
2183 mono_thread_suspend (MonoInternalThread *thread)
2185 LOCK_THREAD (thread);
2187 if ((thread->state & ThreadState_Unstarted) != 0 ||
2188 (thread->state & ThreadState_Aborted) != 0 ||
2189 (thread->state & ThreadState_Stopped) != 0)
2191 UNLOCK_THREAD (thread);
2195 if ((thread->state & ThreadState_Suspended) != 0 ||
2196 (thread->state & ThreadState_SuspendRequested) != 0 ||
2197 (thread->state & ThreadState_StopRequested) != 0)
2199 UNLOCK_THREAD (thread);
2203 thread->state |= ThreadState_SuspendRequested;
2205 UNLOCK_THREAD (thread);
2207 suspend_thread_internal (thread, FALSE);
2212 ves_icall_System_Threading_Thread_Suspend (MonoThread *this)
2214 if (!mono_thread_suspend (this->internal_thread)) {
2215 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2221 mono_thread_resume (MonoInternalThread *thread)
2223 LOCK_THREAD (thread);
2225 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2226 thread->state &= ~ThreadState_SuspendRequested;
2227 UNLOCK_THREAD (thread);
2231 if ((thread->state & ThreadState_Suspended) == 0 ||
2232 (thread->state & ThreadState_Unstarted) != 0 ||
2233 (thread->state & ThreadState_Aborted) != 0 ||
2234 (thread->state & ThreadState_Stopped) != 0)
2236 UNLOCK_THREAD (thread);
2240 return resume_thread_internal (thread);
2244 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2246 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread)) {
2247 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2253 mono_threads_is_critical_method (MonoMethod *method)
2255 switch (method->wrapper_type) {
2256 case MONO_WRAPPER_RUNTIME_INVOKE:
2257 case MONO_WRAPPER_XDOMAIN_INVOKE:
2258 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2265 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2270 if (mono_threads_is_critical_method (m)) {
2271 *((gboolean*)data) = TRUE;
2278 is_running_protected_wrapper (void)
2280 gboolean found = FALSE;
2281 mono_stack_walk (find_wrapper, &found);
2285 void mono_thread_internal_stop (MonoInternalThread *thread)
2287 LOCK_THREAD (thread);
2289 if ((thread->state & ThreadState_StopRequested) != 0 ||
2290 (thread->state & ThreadState_Stopped) != 0)
2292 UNLOCK_THREAD (thread);
2296 /* Make sure the thread is awake */
2297 mono_thread_resume (thread);
2299 thread->state |= ThreadState_StopRequested;
2300 thread->state &= ~ThreadState_AbortRequested;
2302 UNLOCK_THREAD (thread);
2304 abort_thread_internal (thread, TRUE, TRUE);
2307 void mono_thread_stop (MonoThread *thread)
2309 mono_thread_internal_stop (thread->internal_thread);
2313 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2316 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2321 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2324 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2329 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2332 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2337 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2340 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2345 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2348 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2349 return (void *) tmp;
2353 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2355 volatile MonoObject *tmp;
2356 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2357 return (MonoObject *) tmp;
2361 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2364 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2369 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2372 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2377 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2379 return InterlockedRead8 (ptr);
2383 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2385 return InterlockedRead16 (ptr);
2389 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2391 return InterlockedRead (ptr);
2395 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2397 #if SIZEOF_VOID_P == 4
2398 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2400 mono_interlocked_lock ();
2401 val = *(gint64*)ptr;
2402 mono_interlocked_unlock ();
2406 return InterlockedRead64 (ptr);
2410 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2412 return InterlockedReadPointer (ptr);
2416 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2420 #if SIZEOF_VOID_P == 4
2421 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2423 mono_interlocked_lock ();
2424 val = *(double*)ptr;
2425 mono_interlocked_unlock ();
2430 u.ival = InterlockedRead64 (ptr);
2436 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2440 u.ival = InterlockedRead (ptr);
2446 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2448 return InterlockedReadPointer (ptr);
2452 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2454 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2458 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2460 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2464 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2466 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2470 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2472 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2476 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2478 mono_atomic_store_release ((volatile void **) ptr, value);
2482 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2484 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2488 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2490 mono_atomic_store_release ((volatile double *) ptr, value);
2494 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2496 mono_atomic_store_release ((volatile float *) ptr, value);
2500 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2502 InterlockedWrite8 (ptr, value);
2506 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2508 InterlockedWrite16 (ptr, value);
2512 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2514 InterlockedWrite (ptr, value);
2518 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2520 #if SIZEOF_VOID_P == 4
2521 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2522 mono_interlocked_lock ();
2523 *(gint64*)ptr = value;
2524 mono_interlocked_unlock ();
2529 InterlockedWrite64 (ptr, value);
2533 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2535 InterlockedWritePointer (ptr, value);
2539 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2543 #if SIZEOF_VOID_P == 4
2544 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2545 mono_interlocked_lock ();
2546 *(double*)ptr = value;
2547 mono_interlocked_unlock ();
2554 InterlockedWrite64 (ptr, u.ival);
2558 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2564 InterlockedWrite (ptr, u.ival);
2568 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2570 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2574 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2576 mono_threads_lock ();
2578 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2581 contexts = g_hash_table_new (NULL, NULL);
2583 context_adjust_static_data (ctx);
2584 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2585 g_hash_table_insert (contexts, gch, gch);
2587 mono_threads_unlock ();
2591 mono_thread_init_tls (void)
2593 MONO_FAST_TLS_INIT (tls_current_object);
2594 mono_native_tls_alloc (¤t_object_key, NULL);
2597 void mono_thread_init (MonoThreadStartCB start_cb,
2598 MonoThreadAttachCB attach_cb)
2600 mono_mutex_init_recursive(&threads_mutex);
2601 mono_mutex_init_recursive(&interlocked_mutex);
2602 mono_mutex_init_recursive(&joinable_threads_mutex);
2604 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2605 g_assert(background_change_event != NULL);
2607 mono_init_static_data_info (&thread_static_info);
2608 mono_init_static_data_info (&context_static_info);
2610 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2612 mono_thread_start_cb = start_cb;
2613 mono_thread_attach_cb = attach_cb;
2615 /* Get a pseudo handle to the current process. This is just a
2616 * kludge so that wapi can build a process handle if needed.
2617 * As a pseudo handle is returned, we don't need to clean
2620 GetCurrentProcess ();
2623 void mono_thread_cleanup (void)
2625 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2626 MonoThreadInfo *info;
2628 /* The main thread must abandon any held mutexes (particularly
2629 * important for named mutexes as they are shared across
2630 * processes, see bug 74680.) This will happen when the
2631 * thread exits, but if it's not running in a subthread it
2632 * won't exit in time.
2634 info = mono_thread_info_current ();
2635 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2639 /* This stuff needs more testing, it seems one of these
2640 * critical sections can be locked when mono_thread_cleanup is
2643 mono_mutex_destroy (&threads_mutex);
2644 mono_mutex_destroy (&interlocked_mutex);
2645 mono_mutex_destroy (&delayed_free_table_mutex);
2646 mono_mutex_destroy (&small_id_mutex);
2647 CloseHandle (background_change_event);
2650 mono_native_tls_free (current_object_key);
2654 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2656 mono_thread_cleanup_fn = func;
2660 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2662 thread->internal_thread->manage_callback = func;
2665 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2667 mono_thread_notify_pending_exc_fn = func;
2671 static void print_tids (gpointer key, gpointer value, gpointer user)
2673 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2674 * sizeof(uint) and a cast to uint would overflow
2676 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2677 * print this as a pointer.
2679 g_message ("Waiting for: %p", key);
2684 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2685 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2689 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2693 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2695 MONO_PREPARE_BLOCKING
2696 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2697 MONO_FINISH_BLOCKING
2699 if(ret==WAIT_FAILED) {
2700 /* See the comment in build_wait_tids() */
2701 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2705 for(i=0; i<wait->num; i++)
2706 CloseHandle (wait->handles[i]);
2708 if (ret == WAIT_TIMEOUT)
2711 for(i=0; i<wait->num; i++) {
2712 gsize tid = wait->threads[i]->tid;
2715 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2716 * it can still run io-layer etc. code. So wait for it to really exit.
2717 * FIXME: This won't join threads which are not in the joinable_hash yet.
2719 mono_thread_join ((gpointer)tid);
2721 mono_threads_lock ();
2722 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2723 /* This thread must have been killed, because
2724 * it hasn't cleaned itself up. (It's just
2725 * possible that the thread exited before the
2726 * parent thread had a chance to store the
2727 * handle, and now there is another pointer to
2728 * the already-exited thread stored. In this
2729 * case, we'll just get two
2730 * mono_profiler_thread_end() calls for the
2734 mono_threads_unlock ();
2735 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2736 thread_cleanup (wait->threads[i]);
2738 mono_threads_unlock ();
2743 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2745 guint32 i, ret, count;
2747 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2749 /* Add the thread state change event, so it wakes up if a thread changes
2750 * to background mode.
2753 if (count < MAXIMUM_WAIT_OBJECTS) {
2754 wait->handles [count] = background_change_event;
2758 MONO_PREPARE_BLOCKING
2759 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2760 MONO_FINISH_BLOCKING
2762 if(ret==WAIT_FAILED) {
2763 /* See the comment in build_wait_tids() */
2764 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2768 for(i=0; i<wait->num; i++)
2769 CloseHandle (wait->handles[i]);
2771 if (ret == WAIT_TIMEOUT)
2774 if (ret < wait->num) {
2775 gsize tid = wait->threads[ret]->tid;
2776 mono_threads_lock ();
2777 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2778 /* See comment in wait_for_tids about thread cleanup */
2779 mono_threads_unlock ();
2780 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2781 thread_cleanup (wait->threads [ret]);
2783 mono_threads_unlock ();
2787 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2789 struct wait_data *wait=(struct wait_data *)user;
2791 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2793 MonoInternalThread *thread=(MonoInternalThread *)value;
2795 /* Ignore background threads, we abort them later */
2796 /* Do not lock here since it is not needed and the caller holds threads_lock */
2797 if (thread->state & ThreadState_Background) {
2798 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2799 return; /* just leave, ignore */
2802 if (mono_gc_is_finalizer_internal_thread (thread)) {
2803 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2807 if (thread == mono_thread_internal_current ()) {
2808 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2812 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2813 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2817 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2818 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2822 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2823 if (handle == NULL) {
2824 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2828 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2829 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2830 wait->handles[wait->num]=handle;
2831 wait->threads[wait->num]=thread;
2834 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2836 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2841 /* Just ignore the rest, we can't do anything with
2848 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2850 struct wait_data *wait=(struct wait_data *)user;
2851 gsize self = GetCurrentThreadId ();
2852 MonoInternalThread *thread = value;
2855 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2858 /* The finalizer thread is not a background thread */
2859 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2860 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2862 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2866 /* printf ("A: %d\n", wait->num); */
2867 wait->handles[wait->num]=thread->handle;
2868 wait->threads[wait->num]=thread;
2871 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2872 mono_thread_internal_stop (thread);
2876 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2880 * mono_threads_set_shutting_down:
2882 * Is called by a thread that wants to shut down Mono. If the runtime is already
2883 * shutting down, the calling thread is suspended/stopped, and this function never
2887 mono_threads_set_shutting_down (void)
2889 MonoInternalThread *current_thread = mono_thread_internal_current ();
2891 mono_threads_lock ();
2893 if (shutting_down) {
2894 mono_threads_unlock ();
2896 /* Make sure we're properly suspended/stopped */
2898 LOCK_THREAD (current_thread);
2900 if ((current_thread->state & ThreadState_SuspendRequested) ||
2901 (current_thread->state & ThreadState_AbortRequested) ||
2902 (current_thread->state & ThreadState_StopRequested)) {
2903 UNLOCK_THREAD (current_thread);
2904 mono_thread_execute_interruption (current_thread);
2906 current_thread->state |= ThreadState_Stopped;
2907 UNLOCK_THREAD (current_thread);
2910 /*since we're killing the thread, unset the current domain.*/
2911 mono_domain_unset ();
2913 /* Wake up other threads potentially waiting for us */
2914 mono_thread_info_exit ();
2916 shutting_down = TRUE;
2918 /* Not really a background state change, but this will
2919 * interrupt the main thread if it is waiting for all
2920 * the other threads.
2922 SetEvent (background_change_event);
2924 mono_threads_unlock ();
2928 void mono_thread_manage (void)
2930 struct wait_data wait_data;
2931 struct wait_data *wait = &wait_data;
2933 memset (wait, 0, sizeof (struct wait_data));
2934 /* join each thread that's still running */
2935 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2937 mono_threads_lock ();
2939 THREAD_DEBUG (g_message("%s: No threads", __func__));
2940 mono_threads_unlock ();
2943 mono_threads_unlock ();
2946 mono_threads_lock ();
2947 if (shutting_down) {
2948 /* somebody else is shutting down */
2949 mono_threads_unlock ();
2952 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2953 mono_g_hash_table_foreach (threads, print_tids, NULL));
2955 ResetEvent (background_change_event);
2957 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2958 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2959 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2960 mono_threads_unlock ();
2962 /* Something to wait for */
2963 wait_for_tids_or_state_change (wait, INFINITE);
2965 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2966 } while(wait->num>0);
2968 /* Mono is shutting down, so just wait for the end */
2969 if (!mono_runtime_try_shutdown ()) {
2970 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2971 mono_thread_suspend (mono_thread_internal_current ());
2972 mono_thread_execute_interruption (mono_thread_internal_current ());
2976 * Remove everything but the finalizer thread and self.
2977 * Also abort all the background threads
2980 mono_threads_lock ();
2983 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2984 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2985 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2987 mono_threads_unlock ();
2989 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2991 /* Something to wait for */
2992 wait_for_tids (wait, INFINITE);
2994 } while (wait->num > 0);
2997 * give the subthreads a chance to really quit (this is mainly needed
2998 * to get correct user and system times from getrusage/wait/time(1)).
2999 * This could be removed if we avoid pthread_detach() and use pthread_join().
3001 mono_thread_info_yield ();
3004 static void terminate_thread (gpointer key, gpointer value, gpointer user)
3006 MonoInternalThread *thread=(MonoInternalThread *)value;
3008 if(thread->tid != (gsize)user) {
3009 /*TerminateThread (thread->handle, -1);*/
3013 void mono_thread_abort_all_other_threads (void)
3015 gsize self = GetCurrentThreadId ();
3017 mono_threads_lock ();
3018 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
3019 mono_g_hash_table_size (threads));
3020 mono_g_hash_table_foreach (threads, print_tids, NULL));
3022 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3024 mono_threads_unlock ();
3028 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3030 MonoInternalThread *thread = (MonoInternalThread*)value;
3031 struct wait_data *wait = (struct wait_data*)user_data;
3035 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3037 * This needs no locking.
3039 if ((thread->state & ThreadState_Suspended) != 0 ||
3040 (thread->state & ThreadState_Stopped) != 0)
3043 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3044 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3048 wait->handles [wait->num] = handle;
3049 wait->threads [wait->num] = thread;
3055 * mono_thread_suspend_all_other_threads:
3057 * Suspend all managed threads except the finalizer thread and this thread. It is
3058 * not possible to resume them later.
3060 void mono_thread_suspend_all_other_threads (void)
3062 struct wait_data wait_data;
3063 struct wait_data *wait = &wait_data;
3065 gsize self = GetCurrentThreadId ();
3066 guint32 eventidx = 0;
3067 gboolean starting, finished;
3069 memset (wait, 0, sizeof (struct wait_data));
3071 * The other threads could be in an arbitrary state at this point, i.e.
3072 * they could be starting up, shutting down etc. This means that there could be
3073 * threads which are not even in the threads hash table yet.
3077 * First we set a barrier which will be checked by all threads before they
3078 * are added to the threads hash table, and they will exit if the flag is set.
3079 * This ensures that no threads could be added to the hash later.
3080 * We will use shutting_down as the barrier for now.
3082 g_assert (shutting_down);
3085 * We make multiple calls to WaitForMultipleObjects since:
3086 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3087 * - some threads could exit without becoming suspended
3092 * Make a copy of the hashtable since we can't do anything with
3093 * threads while threads_mutex is held.
3096 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3097 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3098 mono_threads_lock ();
3099 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3100 mono_threads_unlock ();
3103 /* Get the suspended events that we'll be waiting for */
3104 for (i = 0; i < wait->num; ++i) {
3105 MonoInternalThread *thread = wait->threads [i];
3107 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3108 //CloseHandle (wait->handles [i]);
3109 wait->threads [i] = NULL; /* ignore this thread in next loop */
3113 LOCK_THREAD (thread);
3115 if ((thread->state & ThreadState_Suspended) != 0 ||
3116 (thread->state & ThreadState_StopRequested) != 0 ||
3117 (thread->state & ThreadState_Stopped) != 0) {
3118 UNLOCK_THREAD (thread);
3119 CloseHandle (wait->handles [i]);
3120 wait->threads [i] = NULL; /* ignore this thread in next loop */
3126 /* Convert abort requests into suspend requests */
3127 if ((thread->state & ThreadState_AbortRequested) != 0)
3128 thread->state &= ~ThreadState_AbortRequested;
3130 thread->state |= ThreadState_SuspendRequested;
3132 UNLOCK_THREAD (thread);
3134 /* Signal the thread to suspend */
3135 suspend_thread_internal (thread, TRUE);
3137 if (eventidx <= 0) {
3139 * If there are threads which are starting up, we wait until they
3140 * are suspended when they try to register in the threads hash.
3141 * This is guaranteed to finish, since the threads which can create new
3142 * threads get suspended after a while.
3143 * FIXME: The finalizer thread can still create new threads.
3145 mono_threads_lock ();
3146 if (threads_starting_up)
3147 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3150 mono_threads_unlock ();
3159 static gboolean thread_dump_requested;
3161 static G_GNUC_UNUSED gboolean
3162 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3164 GString *p = (GString*)data;
3165 MonoMethod *method = NULL;
3167 method = mono_jit_info_get_method (frame->ji);
3170 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3171 g_string_append_printf (p, " %s\n", location);
3174 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3179 static SuspendThreadResult
3180 print_thread_dump (MonoThreadInfo *info, gpointer ud)
3182 MonoInternalThread *thread = ud;
3183 GString* text = g_string_new (0);
3185 GError *error = NULL;
3188 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3190 g_string_append_printf (text, "\n\"%s\"", name);
3193 else if (thread->threadpool_thread)
3194 g_string_append (text, "\n\"<threadpool thread>\"");
3196 g_string_append (text, "\n\"<unnamed thread>\"");
3199 /* This no longer works with remote unwinding */
3201 wapi_desc = wapi_current_thread_desc ();
3202 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3207 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, text);
3209 fprintf (stdout, "%s", text->str);
3211 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3212 OutputDebugStringA(text->str);
3215 g_string_free (text, TRUE);
3217 return MonoResumeThread;
3221 dump_thread (gpointer key, gpointer value, gpointer user)
3223 MonoInternalThread *thread = (MonoInternalThread *)value;
3225 if (thread == mono_thread_internal_current ())
3229 FIXME This still can hang if we stop a thread during malloc.
3230 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3231 that takes a callback and runs it with the target suspended.
3232 We probably should loop a bit around trying to get it to either managed code
3235 mono_thread_info_safe_suspend_and_run ((MonoNativeThreadId)(gsize)thread->tid, FALSE, print_thread_dump, thread);
3239 mono_threads_perform_thread_dump (void)
3241 if (!thread_dump_requested)
3244 printf ("Full thread dump:\n");
3246 /* We take the loader lock and the root domain lock as to increase our odds of not deadlocking if
3247 something needs then in the process.
3249 mono_loader_lock ();
3250 mono_domain_lock (mono_get_root_domain ());
3252 mono_threads_lock ();
3253 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3254 mono_threads_unlock ();
3256 mono_domain_unlock (mono_get_root_domain ());
3257 mono_loader_unlock ();
3259 thread_dump_requested = FALSE;
3263 * mono_threads_request_thread_dump:
3265 * Ask all threads except the current to print their stacktrace to stdout.
3268 mono_threads_request_thread_dump (void)
3270 /*The new thread dump code runs out of the finalizer thread. */
3271 thread_dump_requested = TRUE;
3272 mono_gc_finalize_notify ();
3277 gint allocated; /* +1 so that refs [allocated] == NULL */
3281 typedef struct ref_stack RefStack;
3284 ref_stack_new (gint initial_size)
3288 initial_size = MAX (initial_size, 16) + 1;
3289 rs = g_new0 (RefStack, 1);
3290 rs->refs = g_new0 (gpointer, initial_size);
3291 rs->allocated = initial_size;
3296 ref_stack_destroy (gpointer ptr)
3307 ref_stack_push (RefStack *rs, gpointer ptr)
3309 g_assert (rs != NULL);
3311 if (rs->bottom >= rs->allocated) {
3312 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3313 rs->allocated <<= 1;
3314 rs->refs [rs->allocated] = NULL;
3316 rs->refs [rs->bottom++] = ptr;
3320 ref_stack_pop (RefStack *rs)
3322 if (rs == NULL || rs->bottom == 0)
3326 rs->refs [rs->bottom] = NULL;
3330 ref_stack_find (RefStack *rs, gpointer ptr)
3337 for (refs = rs->refs; refs && *refs; refs++) {
3345 * mono_thread_push_appdomain_ref:
3347 * Register that the current thread may have references to objects in domain
3348 * @domain on its stack. Each call to this function should be paired with a
3349 * call to pop_appdomain_ref.
3352 mono_thread_push_appdomain_ref (MonoDomain *domain)
3354 MonoInternalThread *thread = mono_thread_internal_current ();
3357 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3358 SPIN_LOCK (thread->lock_thread_id);
3359 if (thread->appdomain_refs == NULL)
3360 thread->appdomain_refs = ref_stack_new (16);
3361 ref_stack_push (thread->appdomain_refs, domain);
3362 SPIN_UNLOCK (thread->lock_thread_id);
3367 mono_thread_pop_appdomain_ref (void)
3369 MonoInternalThread *thread = mono_thread_internal_current ();
3372 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3373 SPIN_LOCK (thread->lock_thread_id);
3374 ref_stack_pop (thread->appdomain_refs);
3375 SPIN_UNLOCK (thread->lock_thread_id);
3380 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3383 SPIN_LOCK (thread->lock_thread_id);
3384 res = ref_stack_find (thread->appdomain_refs, domain);
3385 SPIN_UNLOCK (thread->lock_thread_id);
3390 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3392 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3395 typedef struct abort_appdomain_data {
3396 struct wait_data wait;
3398 } abort_appdomain_data;
3401 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3403 MonoInternalThread *thread = (MonoInternalThread*)value;
3404 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3405 MonoDomain *domain = data->domain;
3407 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3408 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3410 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3411 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3414 data->wait.handles [data->wait.num] = handle;
3415 data->wait.threads [data->wait.num] = thread;
3418 /* Just ignore the rest, we can't do anything with
3426 * mono_threads_abort_appdomain_threads:
3428 * Abort threads which has references to the given appdomain.
3431 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3433 #ifdef __native_client__
3437 abort_appdomain_data user_data;
3439 int orig_timeout = timeout;
3442 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3444 start_time = mono_msec_ticks ();
3446 mono_threads_lock ();
3448 user_data.domain = domain;
3449 user_data.wait.num = 0;
3450 /* This shouldn't take any locks */
3451 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3452 mono_threads_unlock ();
3454 if (user_data.wait.num > 0) {
3455 /* Abort the threads outside the threads lock */
3456 for (i = 0; i < user_data.wait.num; ++i)
3457 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3460 * We should wait for the threads either to abort, or to leave the
3461 * domain. We can't do the latter, so we wait with a timeout.
3463 wait_for_tids (&user_data.wait, 100);
3466 /* Update remaining time */
3467 timeout -= mono_msec_ticks () - start_time;
3468 start_time = mono_msec_ticks ();
3470 if (orig_timeout != -1 && timeout < 0)
3473 while (user_data.wait.num > 0);
3475 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3481 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3483 MonoInternalThread *thread = (MonoInternalThread*)value;
3484 MonoDomain *domain = (MonoDomain*)user_data;
3487 /* No locking needed here */
3488 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3490 if (thread->cached_culture_info) {
3491 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3492 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3493 if (obj && obj->vtable->domain == domain)
3494 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3500 * mono_threads_clear_cached_culture:
3502 * Clear the cached_current_culture from all threads if it is in the
3506 mono_threads_clear_cached_culture (MonoDomain *domain)
3508 mono_threads_lock ();
3509 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3510 mono_threads_unlock ();
3514 * mono_thread_get_undeniable_exception:
3516 * Return an exception which needs to be raised when leaving a catch clause.
3517 * This is used for undeniable exception propagation.
3520 mono_thread_get_undeniable_exception (void)
3522 MonoInternalThread *thread = mono_thread_internal_current ();
3524 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3526 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3527 * exception if the thread no longer references a dying appdomain.
3529 thread->abort_exc->trace_ips = NULL;
3530 thread->abort_exc->stack_trace = NULL;
3531 return thread->abort_exc;
3537 #if MONO_SMALL_CONFIG
3538 #define NUM_STATIC_DATA_IDX 4
3539 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3543 #define NUM_STATIC_DATA_IDX 8
3544 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3545 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3549 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3550 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3553 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3555 gpointer *static_data = addr;
3557 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3558 void **ptr = static_data [i];
3563 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3564 void **p = ptr + idx;
3567 mark_func (p, gc_data);
3573 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3575 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3579 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3581 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3585 * mono_alloc_static_data
3587 * Allocate memory blocks for storing threads or context static data
3590 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3592 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3595 gpointer* static_data = *static_data_ptr;
3597 static void *tls_desc = NULL;
3598 static void *ctx_desc = NULL;
3600 if (mono_gc_user_markers_supported ()) {
3602 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3605 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3608 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc);
3609 *static_data_ptr = static_data;
3610 static_data [0] = static_data;
3613 for (i = 1; i <= idx; ++i) {
3614 if (static_data [i])
3617 if (mono_gc_user_markers_supported ())
3618 static_data [i] = g_malloc0 (static_data_size [i]);
3620 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3625 mono_free_static_data (gpointer* static_data)
3628 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3629 gpointer p = static_data [i];
3633 * At this point, the static data pointer array is still registered with the
3634 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3635 * data. Freeing the individual arrays without first nulling their slots
3636 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3637 * such an already freed array. See bug #13813.
3639 static_data [i] = NULL;
3640 mono_memory_write_barrier ();
3641 if (mono_gc_user_markers_supported ())
3644 mono_gc_free_fixed (p);
3646 mono_gc_free_fixed (static_data);
3650 * mono_init_static_data_info
3652 * Initializes static data counters
3654 static void mono_init_static_data_info (StaticDataInfo *static_data)
3656 static_data->idx = 0;
3657 static_data->offset = 0;
3658 static_data->freelist = NULL;
3662 * mono_alloc_static_data_slot
3664 * Generates an offset for static data. static_data contains the counters
3665 * used to generate it.
3668 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3670 if (!static_data->idx && !static_data->offset) {
3672 * we use the first chunk of the first allocation also as
3673 * an array for the rest of the data
3675 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3677 static_data->offset += align - 1;
3678 static_data->offset &= ~(align - 1);
3679 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3680 static_data->idx ++;
3681 g_assert (size <= static_data_size [static_data->idx]);
3682 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3683 static_data->offset = 0;
3685 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3686 static_data->offset += size;
3691 * ensure thread static fields already allocated are valid for thread
3692 * This function is called when a thread is created or on thread attach.
3695 thread_adjust_static_data (MonoInternalThread *thread)
3697 mono_threads_lock ();
3698 if (thread_static_info.offset || thread_static_info.idx > 0) {
3699 /* get the current allocated size */
3700 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
3701 mono_alloc_static_data (&thread->static_data, offset, TRUE);
3703 mono_threads_unlock ();
3707 context_adjust_static_data (MonoAppContext *ctx)
3709 mono_threads_lock ();
3711 if (context_static_info.offset || context_static_info.idx > 0) {
3712 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
3713 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3716 mono_threads_unlock ();
3720 * LOCKING: requires that threads_mutex is held
3723 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3725 MonoInternalThread *thread = value;
3726 guint32 offset = GPOINTER_TO_UINT (user);
3728 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3732 * LOCKING: requires that threads_mutex is held
3735 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
3737 uint32_t gch = GPOINTER_TO_INT (key);
3738 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (gch);
3741 g_hash_table_remove (contexts, key);
3742 mono_gchandle_free (gch);
3746 guint32 offset = GPOINTER_TO_UINT (user);
3747 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3750 static StaticDataFreeList*
3751 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3753 StaticDataFreeList* prev = NULL;
3754 StaticDataFreeList* tmp = static_data->freelist;
3756 if (tmp->size == size) {
3758 prev->next = tmp->next;
3760 static_data->freelist = tmp->next;
3769 #if SIZEOF_VOID_P == 4
3776 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
3778 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3780 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
3781 MonoBitSet *rb = sets [idx];
3782 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3783 offset /= sizeof (uintptr_t);
3784 /* offset is now the bitmap offset */
3785 for (int i = 0; i < numbits; ++i) {
3786 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3787 mono_bitset_set_fast (rb, offset + i);
3792 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
3794 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3795 MonoBitSet *rb = sets [idx];
3796 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3797 offset /= sizeof (uintptr_t);
3798 /* offset is now the bitmap offset */
3799 for (int i = 0; i < size / sizeof (uintptr_t); i++)
3800 mono_bitset_clear_fast (rb, offset + i);
3804 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3806 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
3808 StaticDataInfo *info;
3811 if (static_type == SPECIAL_STATIC_THREAD) {
3812 info = &thread_static_info;
3813 sets = thread_reference_bitmaps;
3815 info = &context_static_info;
3816 sets = context_reference_bitmaps;
3819 mono_threads_lock ();
3821 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
3825 offset = item->offset;
3828 offset = mono_alloc_static_data_slot (info, size, align);
3831 update_reference_bitmap (sets, offset, bitmap, numbits);
3833 if (static_type == SPECIAL_STATIC_THREAD) {
3834 /* This can be called during startup */
3835 if (threads != NULL)
3836 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3838 if (contexts != NULL)
3839 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
3841 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
3844 mono_threads_unlock ();
3850 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3852 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
3854 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
3855 return get_thread_static_data (thread, offset);
3857 return get_context_static_data (thread->current_appcontext, offset);
3862 mono_get_special_static_data (guint32 offset)
3864 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3873 * LOCKING: requires that threads_mutex is held
3876 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3878 MonoInternalThread *thread = value;
3879 OffsetSize *data = user;
3880 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
3881 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
3884 if (!thread->static_data || !thread->static_data [idx])
3886 ptr = ((char*) thread->static_data [idx]) + off;
3887 mono_gc_bzero_atomic (ptr, data->size);
3891 * LOCKING: requires that threads_mutex is held
3894 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
3896 uint32_t gch = GPOINTER_TO_INT (key);
3897 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (gch);
3900 g_hash_table_remove (contexts, key);
3901 mono_gchandle_free (gch);
3905 OffsetSize *data = user;
3906 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
3907 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
3910 if (!ctx->static_data || !ctx->static_data [idx])
3913 ptr = ((char*) ctx->static_data [idx]) + off;
3914 mono_gc_bzero_atomic (ptr, data->size);
3918 do_free_special_slot (guint32 offset, guint32 size)
3920 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
3922 StaticDataInfo *info;
3924 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
3925 info = &thread_static_info;
3926 sets = thread_reference_bitmaps;
3928 info = &context_static_info;
3929 sets = context_reference_bitmaps;
3932 guint32 data_offset = offset;
3933 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
3934 OffsetSize data = { data_offset, size };
3936 clear_reference_bitmap (sets, data.offset, data.size);
3938 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
3939 if (threads != NULL)
3940 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3942 if (contexts != NULL)
3943 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
3946 if (!mono_runtime_is_shutting_down ()) {
3947 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
3949 item->offset = offset;
3952 item->next = info->freelist;
3953 info->freelist = item;
3958 do_free_special (gpointer key, gpointer value, gpointer data)
3960 MonoClassField *field = key;
3961 guint32 offset = GPOINTER_TO_UINT (value);
3964 size = mono_type_size (field->type, &align);
3965 do_free_special_slot (offset, size);
3969 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3971 mono_threads_lock ();
3973 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3975 mono_threads_unlock ();
3979 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3981 /* Only ever called for ThreadLocal instances */
3982 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
3984 mono_threads_lock ();
3985 do_free_special_slot (offset, size);
3986 mono_threads_unlock ();
3990 static void CALLBACK dummy_apc (ULONG_PTR param)
3996 * mono_thread_execute_interruption
3998 * Performs the operation that the requested thread state requires (abort,
4001 static MonoException*
4002 mono_thread_execute_interruption (MonoInternalThread *thread)
4004 LOCK_THREAD (thread);
4006 /* MonoThread::interruption_requested can only be changed with atomics */
4007 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4008 /* this will consume pending APC calls */
4010 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4012 InterlockedDecrement (&thread_interruption_requested);
4013 /* Clear the interrupted flag of the thread so it can wait again */
4014 mono_thread_info_clear_interruption ();
4017 if ((thread->state & ThreadState_AbortRequested) != 0) {
4018 UNLOCK_THREAD (thread);
4019 if (thread->abort_exc == NULL) {
4021 * This might be racy, but it has to be called outside the lock
4022 * since it calls managed code.
4024 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4026 return thread->abort_exc;
4028 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4029 self_suspend_internal (thread);
4032 else if ((thread->state & ThreadState_StopRequested) != 0) {
4033 /* FIXME: do this through the JIT? */
4035 UNLOCK_THREAD (thread);
4037 mono_thread_exit ();
4039 } else if (thread->pending_exception) {
4042 exc = thread->pending_exception;
4043 thread->pending_exception = NULL;
4045 UNLOCK_THREAD (thread);
4047 } else if (thread->thread_interrupt_requested) {
4049 thread->thread_interrupt_requested = FALSE;
4050 UNLOCK_THREAD (thread);
4052 return(mono_get_exception_thread_interrupted ());
4055 UNLOCK_THREAD (thread);
4061 * mono_thread_request_interruption
4063 * A signal handler can call this method to request the interruption of a
4064 * thread. The result of the interruption will depend on the current state of
4065 * the thread. If the result is an exception that needs to be throw, it is
4066 * provided as return value.
4069 mono_thread_request_interruption (gboolean running_managed)
4071 MonoInternalThread *thread = mono_thread_internal_current ();
4073 /* The thread may already be stopping */
4078 if (thread->interrupt_on_stop &&
4079 thread->state & ThreadState_StopRequested &&
4080 thread->state & ThreadState_Background)
4084 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4086 InterlockedIncrement (&thread_interruption_requested);
4088 if (!running_managed || is_running_protected_wrapper ()) {
4089 /* Can't stop while in unmanaged code. Increase the global interruption
4090 request count. When exiting the unmanaged method the count will be
4091 checked and the thread will be interrupted. */
4093 if (mono_thread_notify_pending_exc_fn && !running_managed)
4094 /* The JIT will notify the thread about the interruption */
4095 /* This shouldn't take any locks */
4096 mono_thread_notify_pending_exc_fn (NULL);
4098 /* this will awake the thread if it is in WaitForSingleObject
4100 /* Our implementation of this function ignores the func argument */
4102 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4104 mono_thread_info_self_interrupt ();
4109 return mono_thread_execute_interruption (thread);
4113 /*This function should be called by a thread after it has exited all of
4114 * its handle blocks at interruption time.*/
4116 mono_thread_resume_interruption (void)
4118 MonoInternalThread *thread = mono_thread_internal_current ();
4119 gboolean still_aborting;
4121 /* The thread may already be stopping */
4125 LOCK_THREAD (thread);
4126 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4127 UNLOCK_THREAD (thread);
4129 /*This can happen if the protected block called Thread::ResetAbort*/
4130 if (!still_aborting)
4133 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4135 InterlockedIncrement (&thread_interruption_requested);
4137 mono_thread_info_self_interrupt ();
4139 return mono_thread_execute_interruption (thread);
4142 gboolean mono_thread_interruption_requested ()
4144 if (thread_interruption_requested) {
4145 MonoInternalThread *thread = mono_thread_internal_current ();
4146 /* The thread may already be stopping */
4148 return (thread->interruption_requested);
4153 static MonoException*
4154 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4156 MonoInternalThread *thread = mono_thread_internal_current ();
4158 /* The thread may already be stopping */
4162 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4163 MonoException* exc = mono_thread_execute_interruption (thread);
4171 * Performs the interruption of the current thread, if one has been requested,
4172 * and the thread is not running a protected wrapper.
4173 * Return the exception which needs to be thrown, if any.
4176 mono_thread_interruption_checkpoint (void)
4178 return mono_thread_interruption_checkpoint_request (FALSE);
4182 * Performs the interruption of the current thread, if one has been requested.
4183 * Return the exception which needs to be thrown, if any.
4186 mono_thread_force_interruption_checkpoint_noraise (void)
4188 return mono_thread_interruption_checkpoint_request (TRUE);
4192 * Performs the interruption of the current thread, if one has been requested.
4193 * Throw the exception which needs to be thrown, if any.
4196 mono_thread_force_interruption_checkpoint (void)
4200 ex = mono_thread_interruption_checkpoint_request (TRUE);
4202 mono_raise_exception (ex);
4206 * mono_thread_get_and_clear_pending_exception:
4208 * Return any pending exceptions for the current thread and clear it as a side effect.
4211 mono_thread_get_and_clear_pending_exception (void)
4213 MonoInternalThread *thread = mono_thread_internal_current ();
4215 /* The thread may already be stopping */
4219 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4220 return mono_thread_execute_interruption (thread);
4223 if (thread->pending_exception) {
4224 MonoException *exc = thread->pending_exception;
4226 thread->pending_exception = NULL;
4234 * mono_set_pending_exception:
4236 * Set the pending exception of the current thread to EXC.
4237 * The exception will be thrown when execution returns to managed code.
4240 mono_set_pending_exception (MonoException *exc)
4242 MonoInternalThread *thread = mono_thread_internal_current ();
4244 /* The thread may already be stopping */
4248 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4250 mono_thread_request_interruption (FALSE);
4254 * mono_thread_interruption_request_flag:
4256 * Returns the address of a flag that will be non-zero if an interruption has
4257 * been requested for a thread. The thread to interrupt may not be the current
4258 * thread, so an additional call to mono_thread_interruption_requested() or
4259 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4262 gint32* mono_thread_interruption_request_flag ()
4264 return &thread_interruption_requested;
4268 mono_thread_init_apartment_state (void)
4271 MonoInternalThread* thread = mono_thread_internal_current ();
4273 /* Positive return value indicates success, either
4274 * S_OK if this is first CoInitialize call, or
4275 * S_FALSE if CoInitialize already called, but with same
4276 * threading model. A negative value indicates failure,
4277 * probably due to trying to change the threading model.
4279 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4280 ? COINIT_APARTMENTTHREADED
4281 : COINIT_MULTITHREADED) < 0) {
4282 thread->apartment_state = ThreadApartmentState_Unknown;
4288 mono_thread_cleanup_apartment_state (void)
4291 MonoInternalThread* thread = mono_thread_internal_current ();
4293 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4300 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4302 LOCK_THREAD (thread);
4303 thread->state |= state;
4304 UNLOCK_THREAD (thread);
4308 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4310 LOCK_THREAD (thread);
4311 thread->state &= ~state;
4312 UNLOCK_THREAD (thread);
4316 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4318 gboolean ret = FALSE;
4320 LOCK_THREAD (thread);
4322 if ((thread->state & test) != 0) {
4326 UNLOCK_THREAD (thread);
4331 static gboolean has_tls_get = FALSE;
4334 mono_runtime_set_has_tls_get (gboolean val)
4340 mono_runtime_has_tls_get (void)
4346 self_interrupt_thread (void *_unused)
4348 MonoThreadInfo *info = mono_thread_info_current ();
4349 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4350 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4351 mono_raise_exception_with_context (exc, &info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX].ctx); /* FIXME using thread_saved_state [ASYNC_SUSPEND_STATE_INDEX] can race with another suspend coming in. */
4352 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4356 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4360 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4364 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4366 MonoJitInfo **dest = data;
4372 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4374 MonoJitInfo *ji = NULL;
4377 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4382 MonoInternalThread *thread;
4383 gboolean install_async_abort;
4384 gpointer interrupt_handle;
4387 static SuspendThreadResult
4388 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4390 AbortThreadData *data = ud;
4391 MonoInternalThread *thread = data->thread;
4392 MonoJitInfo *ji = NULL;
4393 gboolean protected_wrapper;
4394 gboolean running_managed;
4396 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4397 return MonoResumeThread;
4399 /*someone is already interrupting it*/
4400 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4401 return MonoResumeThread;
4403 InterlockedIncrement (&thread_interruption_requested);
4405 ji = mono_thread_info_get_last_managed (info);
4406 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4407 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4409 if (!protected_wrapper && running_managed) {
4410 /*We are in managed code*/
4411 /*Set the thread to call */
4412 if (data->install_async_abort)
4413 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4414 return MonoResumeThread;
4416 if (mono_thread_notify_pending_exc_fn)
4417 /* The JIT will notify the thread about the interruption */
4418 mono_thread_notify_pending_exc_fn (info);
4421 * This will cause waits to be broken.
4422 * It will also prevent the thread from entering a wait, so if the thread returns
4423 * from the wait before it receives the abort signal, it will just spin in the wait
4424 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4427 data->interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4428 return MonoResumeThread;
4433 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4435 AbortThreadData data = { 0 };
4436 data.thread = thread;
4437 data.install_async_abort = install_async_abort;
4440 FIXME this is insanely broken, it doesn't cause interruption to happen
4441 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4443 if (thread == mono_thread_internal_current ()) {
4444 /* Do it synchronously */
4445 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4447 mono_raise_exception (exc);
4448 mono_thread_info_interrupt (thread->handle);
4452 mono_thread_info_safe_suspend_and_run ((MonoNativeThreadId)(gsize)thread->tid, TRUE, abort_thread_critical, &data);
4453 if (data.interrupt_handle)
4454 mono_thread_info_finish_interrupt (data.interrupt_handle);
4455 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4459 MonoInternalThread *thread;
4461 gpointer interrupt_handle;
4462 } SuspendThreadData;
4464 static SuspendThreadResult
4465 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4467 SuspendThreadData *data = ud;
4468 MonoInternalThread *thread = data->thread;
4469 MonoJitInfo *ji = NULL;
4470 gboolean protected_wrapper;
4471 gboolean running_managed;
4473 ji = mono_thread_info_get_last_managed (info);
4474 protected_wrapper = ji && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4475 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4477 if (running_managed && !protected_wrapper) {
4478 thread->state &= ~ThreadState_SuspendRequested;
4479 thread->state |= ThreadState_Suspended;
4480 return KeepSuspended;
4482 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4483 InterlockedIncrement (&thread_interruption_requested);
4484 if (data->interrupt)
4485 data->interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4487 if (mono_thread_notify_pending_exc_fn && !running_managed)
4488 /* The JIT will notify the thread about the interruption */
4489 mono_thread_notify_pending_exc_fn (info);
4490 return MonoResumeThread;
4495 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4497 LOCK_THREAD (thread);
4498 if (thread == mono_thread_internal_current ()) {
4499 mono_thread_info_begin_self_suspend ();
4500 //XXX replace this with better named functions
4501 thread->state &= ~ThreadState_SuspendRequested;
4502 thread->state |= ThreadState_Suspended;
4503 UNLOCK_THREAD (thread);
4504 mono_thread_info_end_self_suspend ();
4506 SuspendThreadData data = { 0 };
4507 data.thread = thread;
4508 data.interrupt = interrupt;
4510 mono_thread_info_safe_suspend_and_run ((MonoNativeThreadId)(gsize)thread->tid, interrupt, suspend_thread_critical, &data);
4511 if (data.interrupt_handle)
4512 mono_thread_info_finish_interrupt (data.interrupt_handle);
4513 UNLOCK_THREAD (thread);
4517 /*This is called with @thread synch_cs held and it must release it*/
4519 self_suspend_internal (MonoInternalThread *thread)
4521 mono_thread_info_begin_self_suspend ();
4522 thread->state &= ~ThreadState_SuspendRequested;
4523 thread->state |= ThreadState_Suspended;
4524 UNLOCK_THREAD (thread);
4525 mono_thread_info_end_self_suspend ();
4528 /*This is called with @thread synch_cs held and it must release it*/
4530 resume_thread_internal (MonoInternalThread *thread)
4532 UNLOCK_THREAD (thread);
4533 /* Awake the thread */
4534 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4536 LOCK_THREAD (thread);
4537 thread->state &= ~ThreadState_Suspended;
4538 UNLOCK_THREAD (thread);
4544 * mono_thread_is_foreign:
4545 * @thread: the thread to query
4547 * This function allows one to determine if a thread was created by the mono runtime and has
4548 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4550 * Returns: true if @thread was not created by the runtime.
4553 mono_thread_is_foreign (MonoThread *thread)
4555 MonoThreadInfo *info = thread->internal_thread->thread_info;
4556 return info->runtime_thread == FALSE;
4560 * mono_add_joinable_thread:
4562 * Add TID to the list of joinable threads.
4563 * LOCKING: Acquires the threads lock.
4566 mono_threads_add_joinable_thread (gpointer tid)
4570 * We cannot detach from threads because it causes problems like
4571 * 2fd16f60/r114307. So we collect them and join them when
4572 * we have time (in he finalizer thread).
4574 joinable_threads_lock ();
4575 if (!joinable_threads)
4576 joinable_threads = g_hash_table_new (NULL, NULL);
4577 g_hash_table_insert (joinable_threads, tid, tid);
4578 joinable_thread_count ++;
4579 joinable_threads_unlock ();
4581 mono_gc_finalize_notify ();
4586 * mono_threads_join_threads:
4588 * Join all joinable threads. This is called from the finalizer thread.
4589 * LOCKING: Acquires the threads lock.
4592 mono_threads_join_threads (void)
4595 GHashTableIter iter;
4602 if (!joinable_thread_count)
4606 joinable_threads_lock ();
4608 if (g_hash_table_size (joinable_threads)) {
4609 g_hash_table_iter_init (&iter, joinable_threads);
4610 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4611 thread = (pthread_t)tid;
4612 g_hash_table_remove (joinable_threads, key);
4613 joinable_thread_count --;
4616 joinable_threads_unlock ();
4618 if (thread != pthread_self ())
4619 /* This shouldn't block */
4620 pthread_join (thread, NULL);
4631 * Wait for thread TID to exit.
4632 * LOCKING: Acquires the threads lock.
4635 mono_thread_join (gpointer tid)
4639 gboolean found = FALSE;
4641 joinable_threads_lock ();
4642 if (!joinable_threads)
4643 joinable_threads = g_hash_table_new (NULL, NULL);
4644 if (g_hash_table_lookup (joinable_threads, tid)) {
4645 g_hash_table_remove (joinable_threads, tid);
4646 joinable_thread_count --;
4649 joinable_threads_unlock ();
4652 thread = (pthread_t)tid;
4653 pthread_join (thread, NULL);