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/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/hazard-pointer.h>
40 #include <mono/utils/mono-tls.h>
41 #include <mono/utils/atomic.h>
42 #include <mono/utils/mono-memory-model.h>
44 #include <mono/metadata/gc-internal.h>
50 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
51 #define USE_TKILL_ON_ANDROID 1
54 #ifdef PLATFORM_ANDROID
57 #ifdef USE_TKILL_ON_ANDROID
58 extern int tkill (pid_t tid, int signal);
62 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
63 #define THREAD_DEBUG(a)
64 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_WAIT_DEBUG(a)
66 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
67 #define LIBGC_DEBUG(a)
69 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
70 #define SPIN_LOCK(i) do { \
71 if (SPIN_TRYLOCK (i)) \
75 #define SPIN_UNLOCK(i) i = 0
77 #define LOCK_THREAD(thread) lock_thread((thread))
78 #define UNLOCK_THREAD(thread) unlock_thread((thread))
80 /* Provide this for systems with glib < 2.6 */
81 #ifndef G_GSIZE_FORMAT
82 # if GLIB_SIZEOF_LONG == 8
83 # define G_GSIZE_FORMAT "lu"
85 # define G_GSIZE_FORMAT "u"
91 guint32 (*func)(void *);
107 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
108 struct _MonoThreadDomainTls {
109 MonoThreadDomainTls *next;
117 MonoThreadDomainTls *freelist;
120 /* Number of cached culture objects in the MonoThread->cached_culture_info array
121 * (per-type): we use the first NUM entries for CultureInfo and the last for
122 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
124 #define NUM_CACHED_CULTURES 4
125 #define CULTURES_START_IDX 0
126 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
128 /* Controls access to the 'threads' hash table */
129 #define mono_threads_lock() mono_mutex_lock (&threads_mutex)
130 #define mono_threads_unlock() mono_mutex_unlock (&threads_mutex)
131 static mono_mutex_t threads_mutex;
133 /* Controls access to context static data */
134 #define mono_contexts_lock() mono_mutex_lock (&contexts_mutex)
135 #define mono_contexts_unlock() mono_mutex_unlock (&contexts_mutex)
136 static mono_mutex_t contexts_mutex;
138 /* Controls access to the 'joinable_threads' hash table */
139 #define joinable_threads_lock() mono_mutex_lock (&joinable_threads_mutex)
140 #define joinable_threads_unlock() mono_mutex_unlock (&joinable_threads_mutex)
141 static mono_mutex_t joinable_threads_mutex;
143 /* Holds current status of static data heap */
144 static StaticDataInfo thread_static_info;
145 static StaticDataInfo context_static_info;
147 /* The hash of existing threads (key is thread ID, value is
148 * MonoInternalThread*) that need joining before exit
150 static MonoGHashTable *threads=NULL;
153 * Threads which are starting up and they are not in the 'threads' hash yet.
154 * When handle_store is called for a thread, it will be removed from this hash table.
155 * Protected by mono_threads_lock ().
157 static MonoGHashTable *threads_starting_up = NULL;
159 /* Maps a MonoThread to its start argument */
160 /* Protected by mono_threads_lock () */
161 static MonoGHashTable *thread_start_args = NULL;
163 /* The TLS key that holds the MonoObject assigned to each thread */
164 static MonoNativeTlsKey current_object_key;
167 /* Protected by the threads lock */
168 static GHashTable *joinable_threads;
169 static int joinable_thread_count;
171 #ifdef MONO_HAVE_FAST_TLS
172 /* we need to use both the Tls* functions and __thread because
173 * the gc needs to see all the threads
175 MONO_FAST_TLS_DECLARE(tls_current_object);
176 #define SET_CURRENT_OBJECT(x) do { \
177 MONO_FAST_TLS_SET (tls_current_object, x); \
178 mono_native_tls_set_value (current_object_key, x); \
180 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
182 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
183 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
186 /* function called at thread start */
187 static MonoThreadStartCB mono_thread_start_cb = NULL;
189 /* function called at thread attach */
190 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
192 /* function called at thread cleanup */
193 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
195 /* function called to notify the runtime about a pending exception on the current thread */
196 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
198 /* The default stack size for each thread */
199 static guint32 default_stacksize = 0;
200 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
202 static void thread_adjust_static_data (MonoInternalThread *thread);
203 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
204 static void mono_init_static_data_info (StaticDataInfo *static_data);
205 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
206 static gboolean mono_thread_resume (MonoInternalThread* thread);
207 static void signal_thread_state_change (MonoInternalThread *thread);
208 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
209 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
210 static void self_suspend_internal (MonoInternalThread *thread);
211 static gboolean resume_thread_internal (MonoInternalThread *thread);
213 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
214 static void ref_stack_destroy (gpointer rs);
216 /* Spin lock for InterlockedXXX 64 bit functions */
217 #define mono_interlocked_lock() mono_mutex_lock (&interlocked_mutex)
218 #define mono_interlocked_unlock() mono_mutex_unlock (&interlocked_mutex)
219 static mono_mutex_t interlocked_mutex;
221 /* global count of thread interruptions requested */
222 static gint32 thread_interruption_requested = 0;
224 /* Event signaled when a thread changes its background mode */
225 static HANDLE background_change_event;
227 static gboolean shutting_down = FALSE;
229 static gint32 managed_thread_id_counter = 0;
232 get_next_managed_thread_id (void)
234 return InterlockedIncrement (&managed_thread_id_counter);
238 mono_thread_get_tls_key (void)
240 return current_object_key;
244 mono_thread_get_tls_offset (void)
247 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
251 static inline MonoNativeThreadId
252 thread_get_tid (MonoInternalThread *thread)
254 /* We store the tid as a guint64 to keep the object layout constant between platforms */
255 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
258 /* handle_store() and handle_remove() manage the array of threads that
259 * still need to be waited for when the main thread exits.
261 * If handle_store() returns FALSE the thread must not be started
262 * because Mono is shutting down.
264 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
266 mono_threads_lock ();
268 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
270 if (threads_starting_up)
271 mono_g_hash_table_remove (threads_starting_up, thread);
273 if (shutting_down && !force_attach) {
274 mono_threads_unlock ();
279 MONO_GC_REGISTER_ROOT_FIXED (threads);
280 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
283 /* We don't need to duplicate thread->handle, because it is
284 * only closed when the thread object is finalized by the GC.
286 g_assert (thread->internal_thread);
287 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
288 thread->internal_thread);
290 mono_threads_unlock ();
295 static gboolean handle_remove(MonoInternalThread *thread)
298 gsize tid = thread->tid;
300 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
302 mono_threads_lock ();
305 /* We have to check whether the thread object for the
306 * tid is still the same in the table because the
307 * thread might have been destroyed and the tid reused
308 * in the meantime, in which case the tid would be in
309 * the table, but with another thread object.
311 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
312 mono_g_hash_table_remove (threads, (gpointer)tid);
321 mono_threads_unlock ();
323 /* Don't close the handle here, wait for the object finalizer
324 * to do it. Otherwise, the following race condition applies:
326 * 1) Thread exits (and handle_remove() closes the handle)
328 * 2) Some other handle is reassigned the same slot
330 * 3) Another thread tries to join the first thread, and
331 * blocks waiting for the reassigned handle to be signalled
332 * (which might never happen). This is possible, because the
333 * thread calling Join() still has a reference to the first
339 static void ensure_synch_cs_set (MonoInternalThread *thread)
341 mono_mutex_t *synch_cs;
343 if (thread->synch_cs != NULL) {
347 synch_cs = g_new0 (mono_mutex_t, 1);
348 mono_mutex_init_recursive (synch_cs);
350 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
351 synch_cs, NULL) != NULL) {
352 /* Another thread must have installed this CS */
353 mono_mutex_destroy (synch_cs);
359 lock_thread (MonoInternalThread *thread)
361 if (!thread->synch_cs)
362 ensure_synch_cs_set (thread);
364 g_assert (thread->synch_cs);
365 mono_mutex_lock (thread->synch_cs);
369 unlock_thread (MonoInternalThread *thread)
371 mono_mutex_unlock (thread->synch_cs);
375 * NOTE: this function can be called also for threads different from the current one:
376 * make sure no code called from it will ever assume it is run on the thread that is
377 * getting cleaned up.
379 static void thread_cleanup (MonoInternalThread *thread)
381 g_assert (thread != NULL);
383 if (thread->abort_state_handle) {
384 mono_gchandle_free (thread->abort_state_handle);
385 thread->abort_state_handle = 0;
387 thread->abort_exc = NULL;
388 thread->current_appcontext = NULL;
391 * This is necessary because otherwise we might have
392 * cross-domain references which will not get cleaned up when
393 * the target domain is unloaded.
395 if (thread->cached_culture_info) {
397 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
398 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
402 * thread->synch_cs can be NULL if this was called after
403 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
404 * This can happen only during shutdown.
405 * The shutting_down flag is not always set, so we can't assert on it.
407 if (thread->synch_cs)
408 LOCK_THREAD (thread);
410 thread->state |= ThreadState_Stopped;
411 thread->state &= ~ThreadState_Background;
413 if (thread->synch_cs)
414 UNLOCK_THREAD (thread);
417 An interruption request has leaked to cleanup. Adjust the global counter.
419 This can happen is the abort source thread finds the abortee (this) thread
420 in unmanaged code. If this thread never trips back to managed code or check
421 the local flag it will be left set and positively unbalance the global counter.
423 Leaving the counter unbalanced will cause a performance degradation since all threads
424 will now keep checking their local flags all the time.
426 if (InterlockedExchange (&thread->interruption_requested, 0))
427 InterlockedDecrement (&thread_interruption_requested);
429 /* if the thread is not in the hash it has been removed already */
430 if (!handle_remove (thread)) {
431 if (thread == mono_thread_internal_current ()) {
432 mono_domain_unset ();
433 mono_memory_barrier ();
435 /* This needs to be called even if handle_remove () fails */
436 if (mono_thread_cleanup_fn)
437 mono_thread_cleanup_fn (thread->tid);
440 mono_release_type_locks (thread);
442 mono_profiler_thread_end (thread->tid);
444 if (thread == mono_thread_internal_current ()) {
446 * This will signal async signal handlers that the thread has exited.
447 * The profiler callback needs this to be set, so it cannot be done earlier.
449 mono_domain_unset ();
450 mono_memory_barrier ();
453 if (thread == mono_thread_internal_current ())
454 mono_thread_pop_appdomain_ref ();
456 thread->cached_culture_info = NULL;
458 mono_free_static_data (thread->static_data, TRUE);
459 thread->static_data = NULL;
460 ref_stack_destroy (thread->appdomain_refs);
461 thread->appdomain_refs = NULL;
463 if (mono_thread_cleanup_fn)
464 mono_thread_cleanup_fn (thread->tid);
466 if (mono_gc_is_moving ()) {
467 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
468 thread->thread_pinning_ref = NULL;
473 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
476 g_assert ((offset & 0x80000000) == 0);
477 offset &= 0x7fffffff;
478 idx = (offset >> 24) - 1;
479 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
483 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
485 static MonoClassField *current_thread_field = NULL;
489 if (!current_thread_field) {
490 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
491 g_assert (current_thread_field);
494 mono_class_vtable (domain, mono_defaults.thread_class);
495 mono_domain_lock (domain);
496 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
497 mono_domain_unlock (domain);
500 return get_thread_static_data (thread, offset);
504 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
506 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
508 g_assert (current->obj.vtable->domain == domain);
510 g_assert (!*current_thread_ptr);
511 *current_thread_ptr = current;
515 create_thread_object (MonoDomain *domain)
517 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
518 return (MonoThread*)mono_gc_alloc_mature (vt);
522 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
524 MonoThread *thread = create_thread_object (domain);
525 MONO_OBJECT_SETREF (thread, internal_thread, internal);
529 static MonoInternalThread*
530 create_internal_thread (void)
532 MonoInternalThread *thread;
535 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
536 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
538 thread->synch_cs = g_new0 (mono_mutex_t, 1);
539 mono_mutex_init_recursive (thread->synch_cs);
541 thread->apartment_state = ThreadApartmentState_Unknown;
542 thread->managed_id = get_next_managed_thread_id ();
543 if (mono_gc_is_moving ()) {
544 thread->thread_pinning_ref = thread;
545 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
552 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
554 MonoDomain *domain = mono_get_root_domain ();
556 if (!candidate || candidate->obj.vtable->domain != domain)
557 candidate = new_thread_with_internal (domain, thread);
558 set_current_thread_for_domain (domain, thread, candidate);
559 g_assert (!thread->root_domain_thread);
560 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
563 static guint32 WINAPI start_wrapper_internal(void *data)
565 MonoThreadInfo *info;
566 StartInfo *start_info = (StartInfo *)data;
567 guint32 (*start_func)(void *);
571 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
574 MonoInternalThread *internal = start_info->obj->internal_thread;
575 MonoObject *start_delegate = start_info->delegate;
576 MonoDomain *domain = start_info->obj->obj.vtable->domain;
578 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
580 /* We can be sure start_info->obj->tid and
581 * start_info->obj->handle have been set, because the thread
582 * was created suspended, and these values were set before the
586 info = mono_thread_info_current ();
588 internal->thread_info = info;
589 internal->small_id = info->small_id;
593 SET_CURRENT_OBJECT (internal);
595 /* Every thread references the appdomain which created it */
596 mono_thread_push_appdomain_ref (domain);
598 if (!mono_domain_set (domain, FALSE)) {
599 /* No point in raising an appdomain_unloaded exception here */
600 /* FIXME: Cleanup here */
601 mono_thread_pop_appdomain_ref ();
605 start_func = start_info->func;
606 start_arg = start_info->start_arg;
608 /* We have to do this here because mono_thread_new_init()
609 requires that root_domain_thread is set up. */
610 thread_adjust_static_data (internal);
611 init_root_domain_thread (internal, start_info->obj);
613 /* This MUST be called before any managed code can be
614 * executed, as it calls the callback function that (for the
615 * jit) sets the lmf marker.
617 mono_thread_new_init (tid, &tid, start_func);
618 internal->stack_ptr = &tid;
620 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
622 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
624 /* On 2.0 profile (and higher), set explicitly since state might have been
626 if (internal->apartment_state == ThreadApartmentState_Unknown)
627 internal->apartment_state = ThreadApartmentState_MTA;
629 mono_thread_init_apartment_state ();
631 if(internal->start_notify!=NULL) {
632 /* Let the thread that called Start() know we're
635 ReleaseSemaphore (internal->start_notify, 1, NULL);
638 mono_threads_lock ();
639 mono_g_hash_table_remove (thread_start_args, start_info->obj);
640 mono_threads_unlock ();
642 mono_thread_set_execution_context (start_info->obj->ec_to_set);
643 start_info->obj->ec_to_set = NULL;
646 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
650 * Call this after calling start_notify, since the profiler callback might want
651 * to lock the thread, and the lock is held by thread_start () which waits for
654 mono_profiler_thread_start (tid);
656 /* if the name was set before starting, we didn't invoke the profiler callback */
657 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
658 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
659 mono_profiler_thread_name (internal->tid, tname);
662 /* start_func is set only for unmanaged start functions */
664 start_func (start_arg);
667 g_assert (start_delegate != NULL);
668 args [0] = start_arg;
669 /* we may want to handle the exception here. See comment below on unhandled exceptions */
670 mono_runtime_delegate_invoke (start_delegate, args, NULL);
673 /* If the thread calls ExitThread at all, this remaining code
674 * will not be executed, but the main thread will eventually
675 * call thread_cleanup() on this thread's behalf.
678 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
680 /* Do any cleanup needed for apartment state. This
681 * cannot be done in thread_cleanup since thread_cleanup could be
682 * called for a thread other than the current thread.
683 * mono_thread_cleanup_apartment_state cleans up apartment
684 * for the current thead */
685 mono_thread_cleanup_apartment_state ();
687 thread_cleanup (internal);
691 /* Remove the reference to the thread object in the TLS data,
692 * so the thread object can be finalized. This won't be
693 * reached if the thread threw an uncaught exception, so those
694 * thread handles will stay referenced :-( (This is due to
695 * missing support for scanning thread-specific data in the
696 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
699 SET_CURRENT_OBJECT (NULL);
704 static guint32 WINAPI start_wrapper(void *data)
708 /* Avoid scanning the frames above this frame during a GC */
709 mono_gc_set_stack_end ((void*)&dummy);
711 return start_wrapper_internal (data);
717 * Common thread creation code.
718 * LOCKING: Acquires the threads lock.
721 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
722 gboolean throw_on_failure)
724 HANDLE thread_handle;
725 MonoNativeThreadId tid;
726 guint32 create_flags;
729 * Join joinable threads to prevent running out of threads since the finalizer
730 * thread might be blocked/backlogged.
732 mono_threads_join_threads ();
734 mono_threads_lock ();
737 mono_threads_unlock ();
741 * The thread start argument may be an object reference, and there is
742 * no ref to keep it alive when the new thread is started but not yet
743 * registered with the collector. So we store it in a GC tracked hash
746 if (thread_start_args == NULL) {
747 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
748 thread_start_args = mono_g_hash_table_new (NULL, NULL);
750 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
751 if (threads_starting_up == NULL) {
752 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
753 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
755 mono_g_hash_table_insert (threads_starting_up, thread, thread);
756 mono_threads_unlock ();
758 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
759 if (!internal->start_notify) {
760 mono_threads_lock ();
761 mono_g_hash_table_remove (threads_starting_up, thread);
762 mono_threads_unlock ();
763 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
769 stack_size = default_stacksize_for_thread (internal);
771 /* Create suspended, so we can do some housekeeping before the thread
774 create_flags = CREATE_SUSPENDED;
775 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
776 stack_size, create_flags, &tid);
777 if (thread_handle == NULL) {
778 /* The thread couldn't be created, so throw an exception */
779 mono_threads_lock ();
780 mono_g_hash_table_remove (threads_starting_up, thread);
781 mono_threads_unlock ();
783 if (throw_on_failure)
784 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
786 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
789 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
791 internal->handle = thread_handle;
792 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
794 internal->threadpool_thread = threadpool_thread;
795 if (threadpool_thread)
796 mono_thread_set_state (internal, ThreadState_Background);
798 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
800 /* Only store the handle when the thread is about to be
801 * launched, to avoid the main thread deadlocking while trying
802 * to clean up a thread that will never be signalled.
804 if (!handle_store (thread, FALSE))
807 mono_thread_info_resume (tid);
809 if (internal->start_notify) {
811 * Wait for the thread to set up its TLS data etc, so
812 * theres no potential race condition if someone tries
813 * to look up the data believing the thread has
816 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
818 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
819 CloseHandle (internal->start_notify);
820 internal->start_notify = NULL;
823 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
828 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
830 if (mono_thread_start_cb) {
831 mono_thread_start_cb (tid, stack_start, func);
835 void mono_threads_set_default_stacksize (guint32 stacksize)
837 default_stacksize = stacksize;
840 guint32 mono_threads_get_default_stacksize (void)
842 return default_stacksize;
846 * mono_thread_create_internal:
850 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
853 MonoInternalThread *internal;
854 StartInfo *start_info;
857 thread = create_thread_object (domain);
858 internal = create_internal_thread ();
859 MONO_OBJECT_SETREF (thread, internal_thread, internal);
861 start_info = g_new0 (StartInfo, 1);
862 start_info->func = func;
863 start_info->obj = thread;
864 start_info->start_arg = arg;
866 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
870 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
871 if (mono_check_corlib_version () == NULL)
872 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
878 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
880 mono_thread_create_internal (domain, func, arg, FALSE, 0);
884 mono_thread_attach (MonoDomain *domain)
886 return mono_thread_attach_full (domain, FALSE);
890 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
892 MonoThreadInfo *info;
893 MonoInternalThread *thread;
894 MonoThread *current_thread;
895 HANDLE thread_handle;
898 if ((thread = mono_thread_internal_current ())) {
899 if (domain != mono_domain_get ())
900 mono_domain_set (domain, TRUE);
901 /* Already attached */
902 return mono_thread_current ();
905 if (!mono_gc_register_thread (&domain)) {
906 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 ());
909 thread = create_internal_thread ();
911 thread_handle = mono_thread_info_open_handle ();
912 g_assert (thread_handle);
914 tid=GetCurrentThreadId ();
916 thread->handle=thread_handle;
918 #ifdef PLATFORM_ANDROID
919 thread->android_tid = (gpointer) gettid ();
921 thread->stack_ptr = &tid;
923 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
925 info = mono_thread_info_current ();
927 thread->thread_info = info;
928 thread->small_id = info->small_id;
930 current_thread = new_thread_with_internal (domain, thread);
932 if (!handle_store (current_thread, force_attach)) {
933 /* Mono is shutting down, so just wait for the end */
938 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
940 SET_CURRENT_OBJECT (thread);
941 mono_domain_set (domain, TRUE);
943 thread_adjust_static_data (thread);
945 init_root_domain_thread (thread, current_thread);
946 if (domain != mono_get_root_domain ())
947 set_current_thread_for_domain (domain, thread, current_thread);
950 if (mono_thread_attach_cb) {
954 mono_thread_info_get_stack_bounds (&staddr, &stsize);
957 mono_thread_attach_cb (tid, &tid);
959 mono_thread_attach_cb (tid, staddr + stsize);
962 // FIXME: Need a separate callback
963 mono_profiler_thread_start (tid);
965 return current_thread;
969 mono_thread_detach_internal (MonoInternalThread *thread)
971 g_return_if_fail (thread != NULL);
973 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
975 thread_cleanup (thread);
977 SET_CURRENT_OBJECT (NULL);
978 mono_domain_unset ();
980 /* Don't need to CloseHandle this thread, even though we took a
981 * reference in mono_thread_attach (), because the GC will do it
982 * when the Thread object is finalised.
987 mono_thread_detach (MonoThread *thread)
990 mono_thread_detach_internal (thread->internal_thread);
994 * mono_thread_detach_if_exiting:
996 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
997 * This should be used at the end of embedding code which calls into managed code, and which
998 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1001 mono_thread_detach_if_exiting (void)
1003 if (mono_thread_info_is_exiting ()) {
1004 MonoInternalThread *thread;
1006 thread = mono_thread_internal_current ();
1008 mono_thread_detach_internal (thread);
1009 mono_thread_info_detach ();
1017 MonoInternalThread *thread = mono_thread_internal_current ();
1019 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1021 thread_cleanup (thread);
1022 SET_CURRENT_OBJECT (NULL);
1023 mono_domain_unset ();
1025 /* we could add a callback here for embedders to use. */
1026 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1027 exit (mono_environment_exitcode_get ());
1028 mono_thread_info_exit ();
1032 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1034 MonoInternalThread *internal = create_internal_thread ();
1036 internal->state = ThreadState_Unstarted;
1038 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1042 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
1045 StartInfo *start_info;
1046 MonoInternalThread *internal;
1049 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1051 if (!this->internal_thread)
1052 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1053 internal = this->internal_thread;
1055 LOCK_THREAD (internal);
1057 if ((internal->state & ThreadState_Unstarted) == 0) {
1058 UNLOCK_THREAD (internal);
1059 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1063 if ((internal->state & ThreadState_Aborted) != 0) {
1064 UNLOCK_THREAD (internal);
1067 /* This is freed in start_wrapper */
1068 start_info = g_new0 (StartInfo, 1);
1069 start_info->func = NULL;
1070 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1071 start_info->delegate = start;
1072 start_info->obj = this;
1073 g_assert (this->obj.vtable->domain == mono_domain_get ());
1075 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1077 UNLOCK_THREAD (internal);
1081 internal->state &= ~ThreadState_Unstarted;
1083 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1085 UNLOCK_THREAD (internal);
1086 return internal->handle;
1090 * This is called from the finalizer of the internal thread object.
1093 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1095 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1098 * Since threads keep a reference to their thread object while running, by the time this function is called,
1099 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1100 * when thread_cleanup () can be called after this.
1103 CloseHandle (thread);
1105 if (this->synch_cs) {
1106 mono_mutex_t *synch_cs = this->synch_cs;
1107 this->synch_cs = NULL;
1108 mono_mutex_destroy (synch_cs);
1113 void *name = this->name;
1120 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1123 MonoInternalThread *thread = mono_thread_internal_current ();
1125 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1127 mono_thread_current_check_pending_interrupt ();
1130 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1132 res = SleepEx(ms,TRUE);
1134 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1136 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1137 MonoException* exc = mono_thread_execute_interruption (thread);
1139 mono_raise_exception (exc);
1151 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1156 ves_icall_System_Threading_Thread_GetDomainID (void)
1158 return mono_domain_get()->domain_id;
1162 ves_icall_System_Threading_Thread_Yield (void)
1164 return mono_thread_info_yield ();
1168 * mono_thread_get_name:
1170 * Return the name of the thread. NAME_LEN is set to the length of the name.
1171 * Return NULL if the thread has no name. The returned memory is owned by the
1175 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1179 LOCK_THREAD (this_obj);
1181 if (!this_obj->name) {
1185 *name_len = this_obj->name_len;
1186 res = g_new (gunichar2, this_obj->name_len);
1187 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1190 UNLOCK_THREAD (this_obj);
1196 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1200 LOCK_THREAD (this_obj);
1202 if (!this_obj->name)
1205 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1207 UNLOCK_THREAD (this_obj);
1213 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1215 LOCK_THREAD (this_obj);
1217 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1218 UNLOCK_THREAD (this_obj);
1220 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1223 if (this_obj->name) {
1224 g_free (this_obj->name);
1225 this_obj->name_len = 0;
1228 this_obj->name = g_new (gunichar2, mono_string_length (name));
1229 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1230 this_obj->name_len = mono_string_length (name);
1233 this_obj->name = NULL;
1236 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1238 UNLOCK_THREAD (this_obj);
1240 if (this_obj->name && this_obj->tid) {
1241 char *tname = mono_string_to_utf8 (name);
1242 mono_profiler_thread_name (this_obj->tid, tname);
1243 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1249 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1251 mono_thread_set_name_internal (this_obj, name, TRUE);
1255 ves_icall_System_Threading_Thread_GetPriority (MonoInternalThread *thread)
1257 return ThreadPriority_Lowest;
1261 ves_icall_System_Threading_Thread_SetPriority (MonoInternalThread *thread, int priority)
1265 /* If the array is already in the requested domain, we just return it,
1266 otherwise we return a copy in that domain. */
1268 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1275 if (mono_object_domain (arr) == domain)
1278 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1279 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1284 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1286 return byte_array_to_domain (arr, mono_get_root_domain ());
1290 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1292 return byte_array_to_domain (arr, mono_domain_get ());
1296 mono_thread_current (void)
1298 MonoDomain *domain = mono_domain_get ();
1299 MonoInternalThread *internal = mono_thread_internal_current ();
1300 MonoThread **current_thread_ptr;
1302 g_assert (internal);
1303 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1305 if (!*current_thread_ptr) {
1306 g_assert (domain != mono_get_root_domain ());
1307 *current_thread_ptr = new_thread_with_internal (domain, internal);
1309 return *current_thread_ptr;
1313 mono_thread_internal_current (void)
1315 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1316 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1321 ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1322 int ms, HANDLE thread)
1324 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1327 mono_thread_current_check_pending_interrupt ();
1331 if ((this->state & ThreadState_Unstarted) != 0) {
1332 UNLOCK_THREAD (this);
1334 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1338 UNLOCK_THREAD (this);
1343 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1345 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1347 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1349 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1351 if(ret==WAIT_OBJECT_0) {
1352 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1357 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1363 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1371 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1374 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1376 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1378 if (ret != WAIT_IO_COMPLETION)
1381 exc = mono_thread_execute_interruption (thread);
1383 mono_raise_exception (exc);
1388 /* Re-calculate ms according to the time passed */
1389 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1390 if (diff_ms >= ms) {
1394 wait = ms - diff_ms;
1400 /* FIXME: exitContext isnt documented */
1401 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1407 MonoObject *waitHandle;
1408 MonoInternalThread *thread = mono_thread_internal_current ();
1410 /* Do this WaitSleepJoin check before creating objects */
1411 mono_thread_current_check_pending_interrupt ();
1413 /* We fail in managed if the array has more than 64 elements */
1414 numhandles = (guint32)mono_array_length(mono_handles);
1415 handles = g_new0(HANDLE, numhandles);
1417 for(i = 0; i < numhandles; i++) {
1418 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1419 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1426 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1428 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1430 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1434 if(ret==WAIT_FAILED) {
1435 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1437 } else if(ret==WAIT_TIMEOUT) {
1438 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1445 /* FIXME: exitContext isnt documented */
1446 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1448 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1449 uintptr_t numhandles;
1452 MonoObject *waitHandle;
1453 MonoInternalThread *thread = mono_thread_internal_current ();
1455 /* Do this WaitSleepJoin check before creating objects */
1456 mono_thread_current_check_pending_interrupt ();
1458 numhandles = mono_array_length(mono_handles);
1459 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1462 for(i = 0; i < numhandles; i++) {
1463 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1464 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1471 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1473 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1475 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1477 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1480 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1482 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1483 return ret - WAIT_OBJECT_0;
1485 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1486 return ret - WAIT_ABANDONED_0;
1493 /* FIXME: exitContext isnt documented */
1494 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1497 MonoInternalThread *thread = mono_thread_internal_current ();
1499 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1505 mono_thread_current_check_pending_interrupt ();
1507 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1509 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1511 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1513 if(ret==WAIT_FAILED) {
1514 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1516 } else if(ret==WAIT_TIMEOUT) {
1517 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1525 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1528 MonoInternalThread *thread = mono_thread_internal_current ();
1533 mono_thread_current_check_pending_interrupt ();
1535 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1537 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1539 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1541 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1544 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1551 mutex = CreateMutex (NULL, owned, NULL);
1553 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1555 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1563 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1564 return(ReleaseMutex (handle));
1567 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1573 *error = ERROR_SUCCESS;
1575 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1577 *error = GetLastError ();
1584 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1591 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1593 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1594 mono_string_chars (name));
1596 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1604 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1608 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1613 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1617 *error = ERROR_SUCCESS;
1619 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1621 *error = GetLastError ();
1627 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1634 event = CreateEvent (NULL, manual, initial, NULL);
1636 event = CreateEvent (NULL, manual, initial,
1637 mono_string_chars (name));
1639 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1647 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1648 return (SetEvent(handle));
1651 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1652 return (ResetEvent(handle));
1656 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1657 CloseHandle (handle);
1660 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1666 *error = ERROR_SUCCESS;
1668 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1670 *error = GetLastError ();
1676 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1678 return InterlockedIncrement (location);
1681 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1683 #if SIZEOF_VOID_P == 4
1684 if (G_UNLIKELY ((size_t)location & 0x7)) {
1686 mono_interlocked_lock ();
1689 mono_interlocked_unlock ();
1693 return InterlockedIncrement64 (location);
1696 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1698 return InterlockedDecrement(location);
1701 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1703 #if SIZEOF_VOID_P == 4
1704 if (G_UNLIKELY ((size_t)location & 0x7)) {
1706 mono_interlocked_lock ();
1709 mono_interlocked_unlock ();
1713 return InterlockedDecrement64 (location);
1716 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1718 return InterlockedExchange(location, value);
1721 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1724 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1725 mono_gc_wbarrier_generic_nostore (location);
1729 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1731 return InterlockedExchangePointer(location, value);
1734 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1736 IntFloatUnion val, ret;
1739 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1745 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1747 #if SIZEOF_VOID_P == 4
1748 if (G_UNLIKELY ((size_t)location & 0x7)) {
1750 mono_interlocked_lock ();
1753 mono_interlocked_unlock ();
1757 return InterlockedExchange64 (location, value);
1761 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1763 LongDoubleUnion val, ret;
1766 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1771 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1773 return InterlockedCompareExchange(location, value, comparand);
1776 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1778 gint32 r = InterlockedCompareExchange(location, value, comparand);
1779 *success = r == comparand;
1783 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1786 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1787 mono_gc_wbarrier_generic_nostore (location);
1791 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1793 return InterlockedCompareExchangePointer(location, value, comparand);
1796 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1798 IntFloatUnion val, ret, cmp;
1801 cmp.fval = comparand;
1802 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1808 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1810 #if SIZEOF_VOID_P == 8
1811 LongDoubleUnion val, comp, ret;
1814 comp.fval = comparand;
1815 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1821 mono_interlocked_lock ();
1823 if (old == comparand)
1825 mono_interlocked_unlock ();
1832 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1834 #if SIZEOF_VOID_P == 4
1835 if (G_UNLIKELY ((size_t)location & 0x7)) {
1837 mono_interlocked_lock ();
1839 if (old == comparand)
1841 mono_interlocked_unlock ();
1845 return InterlockedCompareExchange64 (location, value, comparand);
1849 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1852 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1853 mono_gc_wbarrier_generic_nostore (location);
1858 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1861 res = InterlockedExchangePointer ((gpointer *)location, value);
1862 mono_gc_wbarrier_generic_nostore (location);
1867 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1869 return InterlockedAdd (location, value);
1873 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1875 #if SIZEOF_VOID_P == 4
1876 if (G_UNLIKELY ((size_t)location & 0x7)) {
1878 mono_interlocked_lock ();
1881 mono_interlocked_unlock ();
1885 return InterlockedAdd64 (location, value);
1889 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1891 #if SIZEOF_VOID_P == 4
1892 if (G_UNLIKELY ((size_t)location & 0x7)) {
1894 mono_interlocked_lock ();
1896 mono_interlocked_unlock ();
1900 return InterlockedRead64 (location);
1904 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1906 mono_memory_barrier ();
1910 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1912 mono_thread_clr_state (this, state);
1914 if (state & ThreadState_Background) {
1915 /* If the thread changes the background mode, the main thread has to
1916 * be notified, since it has to rebuild the list of threads to
1919 SetEvent (background_change_event);
1924 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1926 mono_thread_set_state (this, state);
1928 if (state & ThreadState_Background) {
1929 /* If the thread changes the background mode, the main thread has to
1930 * be notified, since it has to rebuild the list of threads to
1933 SetEvent (background_change_event);
1938 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1944 state = this->state;
1946 UNLOCK_THREAD (this);
1951 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1953 MonoInternalThread *current;
1958 current = mono_thread_internal_current ();
1960 this->thread_interrupt_requested = TRUE;
1961 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1963 UNLOCK_THREAD (this);
1966 abort_thread_internal (this, TRUE, FALSE);
1970 void mono_thread_current_check_pending_interrupt ()
1972 MonoInternalThread *thread = mono_thread_internal_current ();
1973 gboolean throw = FALSE;
1975 LOCK_THREAD (thread);
1977 if (thread->thread_interrupt_requested) {
1979 thread->thread_interrupt_requested = FALSE;
1982 UNLOCK_THREAD (thread);
1985 mono_raise_exception (mono_get_exception_thread_interrupted ());
1990 mono_thread_get_abort_signal (void)
1992 #if defined (HOST_WIN32) || !defined (HAVE_SIGACTION)
1994 #elif defined(PLATFORM_ANDROID)
1996 #elif !defined (SIGRTMIN)
2001 #endif /* SIGUSR1 */
2003 static int abort_signum = -1;
2005 if (abort_signum != -1)
2006 return abort_signum;
2007 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2008 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2009 struct sigaction sinfo;
2010 sigaction (i, NULL, &sinfo);
2011 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2016 /* fallback to the old way */
2018 #endif /* HOST_WIN32 */
2022 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2024 MonoException* exc = mono_thread_request_interruption (FALSE);
2025 if (exc) mono_raise_exception (exc);
2027 #endif /* HOST_WIN32 */
2030 * signal_thread_state_change
2032 * Tells the thread that his state has changed and it has to enter the new
2033 * state as soon as possible.
2035 static void signal_thread_state_change (MonoInternalThread *thread)
2038 gpointer wait_handle;
2041 if (thread == mono_thread_internal_current ()) {
2042 /* Do it synchronously */
2043 MonoException *exc = mono_thread_request_interruption (FALSE);
2045 mono_raise_exception (exc);
2049 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, (ULONG_PTR)NULL);
2052 * This will cause waits to be broken.
2053 * It will also prevent the thread from entering a wait, so if the thread returns
2054 * from the wait before it receives the abort signal, it will just spin in the wait
2055 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2058 wait_handle = mono_thread_info_prepare_interrupt (thread->handle);
2060 /* fixme: store the state somewhere */
2061 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2063 mono_thread_info_finish_interrupt (wait_handle);
2064 #endif /* HOST_WIN32 */
2068 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2070 LOCK_THREAD (thread);
2072 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2073 (thread->state & ThreadState_StopRequested) != 0 ||
2074 (thread->state & ThreadState_Stopped) != 0)
2076 UNLOCK_THREAD (thread);
2080 if ((thread->state & ThreadState_Unstarted) != 0) {
2081 thread->state |= ThreadState_Aborted;
2082 UNLOCK_THREAD (thread);
2086 thread->state |= ThreadState_AbortRequested;
2087 if (thread->abort_state_handle)
2088 mono_gchandle_free (thread->abort_state_handle);
2090 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2091 g_assert (thread->abort_state_handle);
2093 thread->abort_state_handle = 0;
2095 thread->abort_exc = NULL;
2098 * abort_exc is set in mono_thread_execute_interruption(),
2099 * triggered by the call to signal_thread_state_change(),
2100 * below. There's a point between where we have
2101 * abort_state_handle set, but abort_exc NULL, but that's not
2105 UNLOCK_THREAD (thread);
2107 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2109 /* During shutdown, we can't wait for other threads */
2111 /* Make sure the thread is awake */
2112 mono_thread_resume (thread);
2114 abort_thread_internal (thread, TRUE, TRUE);
2118 ves_icall_System_Threading_Thread_ResetAbort (void)
2120 MonoInternalThread *thread = mono_thread_internal_current ();
2121 gboolean was_aborting;
2123 LOCK_THREAD (thread);
2124 was_aborting = thread->state & ThreadState_AbortRequested;
2125 thread->state &= ~ThreadState_AbortRequested;
2126 UNLOCK_THREAD (thread);
2128 if (!was_aborting) {
2129 const char *msg = "Unable to reset abort because no abort was requested";
2130 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2133 thread->abort_exc = NULL;
2134 if (thread->abort_state_handle) {
2135 mono_gchandle_free (thread->abort_state_handle);
2136 /* This is actually not necessary - the handle
2137 only counts if the exception is set */
2138 thread->abort_state_handle = 0;
2143 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2145 LOCK_THREAD (thread);
2147 thread->state &= ~ThreadState_AbortRequested;
2149 if (thread->abort_exc) {
2150 thread->abort_exc = NULL;
2151 if (thread->abort_state_handle) {
2152 mono_gchandle_free (thread->abort_state_handle);
2153 /* This is actually not necessary - the handle
2154 only counts if the exception is set */
2155 thread->abort_state_handle = 0;
2159 UNLOCK_THREAD (thread);
2163 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2165 MonoInternalThread *thread = this->internal_thread;
2166 MonoObject *state, *deserialized = NULL, *exc;
2169 if (!thread->abort_state_handle)
2172 state = mono_gchandle_get_target (thread->abort_state_handle);
2175 domain = mono_domain_get ();
2176 if (mono_object_domain (state) == domain)
2179 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2181 if (!deserialized) {
2182 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2184 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2185 mono_set_pending_exception (invalid_op_exc);
2189 return deserialized;
2193 mono_thread_suspend (MonoInternalThread *thread)
2195 LOCK_THREAD (thread);
2197 if ((thread->state & ThreadState_Unstarted) != 0 ||
2198 (thread->state & ThreadState_Aborted) != 0 ||
2199 (thread->state & ThreadState_Stopped) != 0)
2201 UNLOCK_THREAD (thread);
2205 if ((thread->state & ThreadState_Suspended) != 0 ||
2206 (thread->state & ThreadState_SuspendRequested) != 0 ||
2207 (thread->state & ThreadState_StopRequested) != 0)
2209 UNLOCK_THREAD (thread);
2213 thread->state |= ThreadState_SuspendRequested;
2215 UNLOCK_THREAD (thread);
2217 suspend_thread_internal (thread, FALSE);
2222 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2224 if (!mono_thread_suspend (thread)) {
2225 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2231 mono_thread_resume (MonoInternalThread *thread)
2233 LOCK_THREAD (thread);
2235 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2236 thread->state &= ~ThreadState_SuspendRequested;
2237 UNLOCK_THREAD (thread);
2241 if ((thread->state & ThreadState_Suspended) == 0 ||
2242 (thread->state & ThreadState_Unstarted) != 0 ||
2243 (thread->state & ThreadState_Aborted) != 0 ||
2244 (thread->state & ThreadState_Stopped) != 0)
2246 UNLOCK_THREAD (thread);
2250 return resume_thread_internal (thread);
2254 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2256 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread)) {
2257 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2263 mono_threads_is_critical_method (MonoMethod *method)
2265 switch (method->wrapper_type) {
2266 case MONO_WRAPPER_RUNTIME_INVOKE:
2267 case MONO_WRAPPER_XDOMAIN_INVOKE:
2268 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2275 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2280 if (mono_threads_is_critical_method (m)) {
2281 *((gboolean*)data) = TRUE;
2288 is_running_protected_wrapper (void)
2290 gboolean found = FALSE;
2291 mono_stack_walk (find_wrapper, &found);
2295 void mono_thread_internal_stop (MonoInternalThread *thread)
2297 LOCK_THREAD (thread);
2299 if ((thread->state & ThreadState_StopRequested) != 0 ||
2300 (thread->state & ThreadState_Stopped) != 0)
2302 UNLOCK_THREAD (thread);
2306 /* Make sure the thread is awake */
2307 mono_thread_resume (thread);
2309 thread->state |= ThreadState_StopRequested;
2310 thread->state &= ~ThreadState_AbortRequested;
2312 UNLOCK_THREAD (thread);
2314 abort_thread_internal (thread, TRUE, TRUE);
2317 void mono_thread_stop (MonoThread *thread)
2319 mono_thread_internal_stop (thread->internal_thread);
2323 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2326 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2331 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2334 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2339 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2342 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2347 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2350 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2355 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2358 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2359 return (void *) tmp;
2363 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2365 volatile MonoObject *tmp;
2366 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2367 return (MonoObject *) tmp;
2371 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2374 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2379 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2382 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2387 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2389 return InterlockedRead8 (ptr);
2393 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2395 return InterlockedRead16 (ptr);
2399 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2401 return InterlockedRead (ptr);
2405 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2407 #if SIZEOF_VOID_P == 4
2408 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2410 mono_interlocked_lock ();
2411 val = *(gint64*)ptr;
2412 mono_interlocked_unlock ();
2416 return InterlockedRead64 (ptr);
2420 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2422 return InterlockedReadPointer (ptr);
2426 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2430 #if SIZEOF_VOID_P == 4
2431 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2433 mono_interlocked_lock ();
2434 val = *(double*)ptr;
2435 mono_interlocked_unlock ();
2440 u.ival = InterlockedRead64 (ptr);
2446 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2450 u.ival = InterlockedRead (ptr);
2456 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2458 return InterlockedReadPointer (ptr);
2462 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2464 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2468 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2470 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2474 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2476 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2480 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2482 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2486 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2488 mono_atomic_store_release ((volatile void **) ptr, value);
2492 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2494 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2498 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2500 mono_atomic_store_release ((volatile double *) ptr, value);
2504 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2506 mono_atomic_store_release ((volatile float *) ptr, value);
2510 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2512 InterlockedWrite8 (ptr, value);
2516 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2518 InterlockedWrite16 (ptr, value);
2522 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2524 InterlockedWrite (ptr, value);
2528 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2530 #if SIZEOF_VOID_P == 4
2531 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2532 mono_interlocked_lock ();
2533 *(gint64*)ptr = value;
2534 mono_interlocked_unlock ();
2539 InterlockedWrite64 (ptr, value);
2543 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2545 InterlockedWritePointer (ptr, value);
2549 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2553 #if SIZEOF_VOID_P == 4
2554 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2555 mono_interlocked_lock ();
2556 *(double*)ptr = value;
2557 mono_interlocked_unlock ();
2564 InterlockedWrite64 (ptr, u.ival);
2568 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2574 InterlockedWrite (ptr, u.ival);
2578 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2580 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2584 mono_thread_init_tls (void)
2586 MONO_FAST_TLS_INIT (tls_current_object);
2587 mono_native_tls_alloc (¤t_object_key, NULL);
2590 void mono_thread_init (MonoThreadStartCB start_cb,
2591 MonoThreadAttachCB attach_cb)
2593 mono_mutex_init_recursive(&threads_mutex);
2594 mono_mutex_init_recursive(&interlocked_mutex);
2595 mono_mutex_init_recursive(&contexts_mutex);
2596 mono_mutex_init_recursive(&joinable_threads_mutex);
2598 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2599 g_assert(background_change_event != NULL);
2601 mono_init_static_data_info (&thread_static_info);
2602 mono_init_static_data_info (&context_static_info);
2604 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2606 mono_thread_start_cb = start_cb;
2607 mono_thread_attach_cb = attach_cb;
2609 /* Get a pseudo handle to the current process. This is just a
2610 * kludge so that wapi can build a process handle if needed.
2611 * As a pseudo handle is returned, we don't need to clean
2614 GetCurrentProcess ();
2617 void mono_thread_cleanup (void)
2619 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2620 MonoThreadInfo *info;
2622 /* The main thread must abandon any held mutexes (particularly
2623 * important for named mutexes as they are shared across
2624 * processes, see bug 74680.) This will happen when the
2625 * thread exits, but if it's not running in a subthread it
2626 * won't exit in time.
2628 info = mono_thread_info_current ();
2629 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2633 /* This stuff needs more testing, it seems one of these
2634 * critical sections can be locked when mono_thread_cleanup is
2637 mono_mutex_destroy (&threads_mutex);
2638 mono_mutex_destroy (&interlocked_mutex);
2639 mono_mutex_destroy (&contexts_mutex);
2640 mono_mutex_destroy (&delayed_free_table_mutex);
2641 mono_mutex_destroy (&small_id_mutex);
2642 CloseHandle (background_change_event);
2645 mono_native_tls_free (current_object_key);
2649 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2651 mono_thread_cleanup_fn = func;
2655 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2657 thread->internal_thread->manage_callback = func;
2660 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2662 mono_thread_notify_pending_exc_fn = func;
2666 static void print_tids (gpointer key, gpointer value, gpointer user)
2668 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2669 * sizeof(uint) and a cast to uint would overflow
2671 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2672 * print this as a pointer.
2674 g_message ("Waiting for: %p", key);
2679 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2680 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2684 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2688 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2690 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2692 if(ret==WAIT_FAILED) {
2693 /* See the comment in build_wait_tids() */
2694 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2698 for(i=0; i<wait->num; i++)
2699 CloseHandle (wait->handles[i]);
2701 if (ret == WAIT_TIMEOUT)
2704 for(i=0; i<wait->num; i++) {
2705 gsize tid = wait->threads[i]->tid;
2708 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2709 * it can still run io-layer etc. code. So wait for it to really exit.
2710 * FIXME: This won't join threads which are not in the joinable_hash yet.
2712 mono_thread_join ((gpointer)tid);
2714 mono_threads_lock ();
2715 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2716 /* This thread must have been killed, because
2717 * it hasn't cleaned itself up. (It's just
2718 * possible that the thread exited before the
2719 * parent thread had a chance to store the
2720 * handle, and now there is another pointer to
2721 * the already-exited thread stored. In this
2722 * case, we'll just get two
2723 * mono_profiler_thread_end() calls for the
2727 mono_threads_unlock ();
2728 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2729 thread_cleanup (wait->threads[i]);
2731 mono_threads_unlock ();
2736 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2738 guint32 i, ret, count;
2740 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2742 /* Add the thread state change event, so it wakes up if a thread changes
2743 * to background mode.
2746 if (count < MAXIMUM_WAIT_OBJECTS) {
2747 wait->handles [count] = background_change_event;
2751 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2753 if(ret==WAIT_FAILED) {
2754 /* See the comment in build_wait_tids() */
2755 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2759 for(i=0; i<wait->num; i++)
2760 CloseHandle (wait->handles[i]);
2762 if (ret == WAIT_TIMEOUT)
2765 if (ret < wait->num) {
2766 gsize tid = wait->threads[ret]->tid;
2767 mono_threads_lock ();
2768 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2769 /* See comment in wait_for_tids about thread cleanup */
2770 mono_threads_unlock ();
2771 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2772 thread_cleanup (wait->threads [ret]);
2774 mono_threads_unlock ();
2778 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2780 struct wait_data *wait=(struct wait_data *)user;
2782 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2784 MonoInternalThread *thread=(MonoInternalThread *)value;
2786 /* Ignore background threads, we abort them later */
2787 /* Do not lock here since it is not needed and the caller holds threads_lock */
2788 if (thread->state & ThreadState_Background) {
2789 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2790 return; /* just leave, ignore */
2793 if (mono_gc_is_finalizer_internal_thread (thread)) {
2794 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2798 if (thread == mono_thread_internal_current ()) {
2799 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2803 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2804 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2808 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2809 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2813 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2814 if (handle == NULL) {
2815 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2819 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2820 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2821 wait->handles[wait->num]=handle;
2822 wait->threads[wait->num]=thread;
2825 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2827 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2832 /* Just ignore the rest, we can't do anything with
2839 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2841 struct wait_data *wait=(struct wait_data *)user;
2842 gsize self = GetCurrentThreadId ();
2843 MonoInternalThread *thread = value;
2846 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2849 /* The finalizer thread is not a background thread */
2850 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2851 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2853 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2857 /* printf ("A: %d\n", wait->num); */
2858 wait->handles[wait->num]=thread->handle;
2859 wait->threads[wait->num]=thread;
2862 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2863 mono_thread_internal_stop (thread);
2867 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2871 * mono_threads_set_shutting_down:
2873 * Is called by a thread that wants to shut down Mono. If the runtime is already
2874 * shutting down, the calling thread is suspended/stopped, and this function never
2878 mono_threads_set_shutting_down (void)
2880 MonoInternalThread *current_thread = mono_thread_internal_current ();
2882 mono_threads_lock ();
2884 if (shutting_down) {
2885 mono_threads_unlock ();
2887 /* Make sure we're properly suspended/stopped */
2889 LOCK_THREAD (current_thread);
2891 if ((current_thread->state & ThreadState_SuspendRequested) ||
2892 (current_thread->state & ThreadState_AbortRequested) ||
2893 (current_thread->state & ThreadState_StopRequested)) {
2894 UNLOCK_THREAD (current_thread);
2895 mono_thread_execute_interruption (current_thread);
2897 current_thread->state |= ThreadState_Stopped;
2898 UNLOCK_THREAD (current_thread);
2901 /*since we're killing the thread, unset the current domain.*/
2902 mono_domain_unset ();
2904 /* Wake up other threads potentially waiting for us */
2905 mono_thread_info_exit ();
2907 shutting_down = TRUE;
2909 /* Not really a background state change, but this will
2910 * interrupt the main thread if it is waiting for all
2911 * the other threads.
2913 SetEvent (background_change_event);
2915 mono_threads_unlock ();
2919 void mono_thread_manage (void)
2921 struct wait_data wait_data;
2922 struct wait_data *wait = &wait_data;
2924 memset (wait, 0, sizeof (struct wait_data));
2925 /* join each thread that's still running */
2926 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2928 mono_threads_lock ();
2930 THREAD_DEBUG (g_message("%s: No threads", __func__));
2931 mono_threads_unlock ();
2934 mono_threads_unlock ();
2937 mono_threads_lock ();
2938 if (shutting_down) {
2939 /* somebody else is shutting down */
2940 mono_threads_unlock ();
2943 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2944 mono_g_hash_table_foreach (threads, print_tids, NULL));
2946 ResetEvent (background_change_event);
2948 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2949 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2950 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2951 mono_threads_unlock ();
2953 /* Something to wait for */
2954 wait_for_tids_or_state_change (wait, INFINITE);
2956 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2957 } while(wait->num>0);
2959 /* Mono is shutting down, so just wait for the end */
2960 if (!mono_runtime_try_shutdown ()) {
2961 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2962 mono_thread_suspend (mono_thread_internal_current ());
2963 mono_thread_execute_interruption (mono_thread_internal_current ());
2967 * Remove everything but the finalizer thread and self.
2968 * Also abort all the background threads
2971 mono_threads_lock ();
2974 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2975 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2976 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2978 mono_threads_unlock ();
2980 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2982 /* Something to wait for */
2983 wait_for_tids (wait, INFINITE);
2985 } while (wait->num > 0);
2988 * give the subthreads a chance to really quit (this is mainly needed
2989 * to get correct user and system times from getrusage/wait/time(1)).
2990 * This could be removed if we avoid pthread_detach() and use pthread_join().
2992 mono_thread_info_yield ();
2995 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2997 MonoInternalThread *thread=(MonoInternalThread *)value;
2999 if(thread->tid != (gsize)user) {
3000 /*TerminateThread (thread->handle, -1);*/
3004 void mono_thread_abort_all_other_threads (void)
3006 gsize self = GetCurrentThreadId ();
3008 mono_threads_lock ();
3009 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
3010 mono_g_hash_table_size (threads));
3011 mono_g_hash_table_foreach (threads, print_tids, NULL));
3013 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3015 mono_threads_unlock ();
3019 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3021 MonoInternalThread *thread = (MonoInternalThread*)value;
3022 struct wait_data *wait = (struct wait_data*)user_data;
3026 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3028 * This needs no locking.
3030 if ((thread->state & ThreadState_Suspended) != 0 ||
3031 (thread->state & ThreadState_Stopped) != 0)
3034 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3035 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3039 wait->handles [wait->num] = handle;
3040 wait->threads [wait->num] = thread;
3046 * mono_thread_suspend_all_other_threads:
3048 * Suspend all managed threads except the finalizer thread and this thread. It is
3049 * not possible to resume them later.
3051 void mono_thread_suspend_all_other_threads (void)
3053 struct wait_data wait_data;
3054 struct wait_data *wait = &wait_data;
3056 gsize self = GetCurrentThreadId ();
3058 guint32 eventidx = 0;
3059 gboolean starting, finished;
3061 memset (wait, 0, sizeof (struct wait_data));
3063 * The other threads could be in an arbitrary state at this point, i.e.
3064 * they could be starting up, shutting down etc. This means that there could be
3065 * threads which are not even in the threads hash table yet.
3069 * First we set a barrier which will be checked by all threads before they
3070 * are added to the threads hash table, and they will exit if the flag is set.
3071 * This ensures that no threads could be added to the hash later.
3072 * We will use shutting_down as the barrier for now.
3074 g_assert (shutting_down);
3077 * We make multiple calls to WaitForMultipleObjects since:
3078 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3079 * - some threads could exit without becoming suspended
3084 * Make a copy of the hashtable since we can't do anything with
3085 * threads while threads_mutex is held.
3088 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3089 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3090 mono_threads_lock ();
3091 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3092 mono_threads_unlock ();
3094 events = g_new0 (gpointer, wait->num);
3096 /* Get the suspended events that we'll be waiting for */
3097 for (i = 0; i < wait->num; ++i) {
3098 MonoInternalThread *thread = wait->threads [i];
3099 gboolean signal_suspend = FALSE;
3101 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3102 //CloseHandle (wait->handles [i]);
3103 wait->threads [i] = NULL; /* ignore this thread in next loop */
3107 LOCK_THREAD (thread);
3109 if (thread->suspended_event == NULL) {
3110 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3111 if (thread->suspended_event == NULL) {
3112 /* Forget this one and go on to the next */
3113 UNLOCK_THREAD (thread);
3118 if ((thread->state & ThreadState_Suspended) != 0 ||
3119 (thread->state & ThreadState_StopRequested) != 0 ||
3120 (thread->state & ThreadState_Stopped) != 0) {
3121 UNLOCK_THREAD (thread);
3122 CloseHandle (wait->handles [i]);
3123 wait->threads [i] = NULL; /* ignore this thread in next loop */
3127 if ((thread->state & ThreadState_SuspendRequested) == 0)
3128 signal_suspend = TRUE;
3130 events [eventidx++] = thread->suspended_event;
3132 /* Convert abort requests into suspend requests */
3133 if ((thread->state & ThreadState_AbortRequested) != 0)
3134 thread->state &= ~ThreadState_AbortRequested;
3136 thread->state |= ThreadState_SuspendRequested;
3138 UNLOCK_THREAD (thread);
3140 /* Signal the thread to suspend */
3141 if (mono_thread_info_new_interrupt_enabled ())
3142 suspend_thread_internal (thread, TRUE);
3143 else if (signal_suspend)
3144 signal_thread_state_change (thread);
3147 /*Only wait on the suspend event if we are using the old path */
3148 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3149 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3150 for (i = 0; i < wait->num; ++i) {
3151 MonoInternalThread *thread = wait->threads [i];
3156 LOCK_THREAD (thread);
3157 if ((thread->state & ThreadState_Suspended) != 0) {
3158 CloseHandle (thread->suspended_event);
3159 thread->suspended_event = NULL;
3161 UNLOCK_THREAD (thread);
3165 if (eventidx <= 0) {
3167 * If there are threads which are starting up, we wait until they
3168 * are suspended when they try to register in the threads hash.
3169 * This is guaranteed to finish, since the threads which can create new
3170 * threads get suspended after a while.
3171 * FIXME: The finalizer thread can still create new threads.
3173 mono_threads_lock ();
3174 if (threads_starting_up)
3175 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3178 mono_threads_unlock ();
3190 collect_threads (gpointer key, gpointer value, gpointer user_data)
3192 MonoInternalThread *thread = (MonoInternalThread*)value;
3193 struct wait_data *wait = (struct wait_data*)user_data;
3196 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3197 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3201 wait->handles [wait->num] = handle;
3202 wait->threads [wait->num] = thread;
3207 static gboolean thread_dump_requested;
3209 static G_GNUC_UNUSED gboolean
3210 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3212 GString *p = (GString*)data;
3213 MonoMethod *method = NULL;
3215 method = mono_jit_info_get_method (frame->ji);
3218 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3219 g_string_append_printf (p, " %s\n", location);
3222 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3227 static SuspendThreadResult
3228 print_thread_dump (MonoThreadInfo *info, gpointer ud)
3230 MonoInternalThread *thread = ud;
3231 GString* text = g_string_new (0);
3233 GError *error = NULL;
3236 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3238 g_string_append_printf (text, "\n\"%s\"", name);
3241 else if (thread->threadpool_thread)
3242 g_string_append (text, "\n\"<threadpool thread>\"");
3244 g_string_append (text, "\n\"<unnamed thread>\"");
3247 /* This no longer works with remote unwinding */
3249 wapi_desc = wapi_current_thread_desc ();
3250 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3255 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);
3257 fprintf (stdout, "%s", text->str);
3259 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3260 OutputDebugStringA(text->str);
3263 g_string_free (text, TRUE);
3265 return MonoResumeThread;
3269 dump_thread (gpointer key, gpointer value, gpointer user)
3271 MonoInternalThread *thread = (MonoInternalThread *)value;
3273 if (thread == mono_thread_internal_current ())
3277 FIXME This still can hang if we stop a thread during malloc.
3278 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3279 that takes a callback and runs it with the target suspended.
3280 We probably should loop a bit around trying to get it to either managed code
3283 mono_thread_info_safe_suspend_and_run ((MonoNativeThreadId)(gsize)thread->tid, FALSE, print_thread_dump, thread);
3287 mono_threads_perform_thread_dump (void)
3289 if (!thread_dump_requested)
3292 printf ("Full thread dump:\n");
3294 /* We take the loader lock and the root domain lock as to increase our odds of not deadlocking if
3295 something needs then in the process.
3297 mono_loader_lock ();
3298 mono_domain_lock (mono_get_root_domain ());
3300 mono_threads_lock ();
3301 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3302 mono_threads_unlock ();
3304 mono_domain_unlock (mono_get_root_domain ());
3305 mono_loader_unlock ();
3307 thread_dump_requested = FALSE;
3311 * mono_threads_request_thread_dump:
3313 * Ask all threads except the current to print their stacktrace to stdout.
3316 mono_threads_request_thread_dump (void)
3318 struct wait_data wait_data;
3319 struct wait_data *wait = &wait_data;
3322 /*The new thread dump code runs out of the finalizer thread. */
3323 if (mono_thread_info_new_interrupt_enabled ()) {
3324 thread_dump_requested = TRUE;
3325 mono_gc_finalize_notify ();
3330 memset (wait, 0, sizeof (struct wait_data));
3333 * Make a copy of the hashtable since we can't do anything with
3334 * threads while threads_mutex is held.
3336 mono_threads_lock ();
3337 mono_g_hash_table_foreach (threads, collect_threads, wait);
3338 mono_threads_unlock ();
3340 for (i = 0; i < wait->num; ++i) {
3341 MonoInternalThread *thread = wait->threads [i];
3343 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3344 (thread != mono_thread_internal_current ()) &&
3345 !thread->thread_dump_requested) {
3346 thread->thread_dump_requested = TRUE;
3348 signal_thread_state_change (thread);
3351 CloseHandle (wait->handles [i]);
3357 gint allocated; /* +1 so that refs [allocated] == NULL */
3361 typedef struct ref_stack RefStack;
3364 ref_stack_new (gint initial_size)
3368 initial_size = MAX (initial_size, 16) + 1;
3369 rs = g_new0 (RefStack, 1);
3370 rs->refs = g_new0 (gpointer, initial_size);
3371 rs->allocated = initial_size;
3376 ref_stack_destroy (gpointer ptr)
3387 ref_stack_push (RefStack *rs, gpointer ptr)
3389 g_assert (rs != NULL);
3391 if (rs->bottom >= rs->allocated) {
3392 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3393 rs->allocated <<= 1;
3394 rs->refs [rs->allocated] = NULL;
3396 rs->refs [rs->bottom++] = ptr;
3400 ref_stack_pop (RefStack *rs)
3402 if (rs == NULL || rs->bottom == 0)
3406 rs->refs [rs->bottom] = NULL;
3410 ref_stack_find (RefStack *rs, gpointer ptr)
3417 for (refs = rs->refs; refs && *refs; refs++) {
3425 * mono_thread_push_appdomain_ref:
3427 * Register that the current thread may have references to objects in domain
3428 * @domain on its stack. Each call to this function should be paired with a
3429 * call to pop_appdomain_ref.
3432 mono_thread_push_appdomain_ref (MonoDomain *domain)
3434 MonoInternalThread *thread = mono_thread_internal_current ();
3437 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3438 SPIN_LOCK (thread->lock_thread_id);
3439 if (thread->appdomain_refs == NULL)
3440 thread->appdomain_refs = ref_stack_new (16);
3441 ref_stack_push (thread->appdomain_refs, domain);
3442 SPIN_UNLOCK (thread->lock_thread_id);
3447 mono_thread_pop_appdomain_ref (void)
3449 MonoInternalThread *thread = mono_thread_internal_current ();
3452 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3453 SPIN_LOCK (thread->lock_thread_id);
3454 ref_stack_pop (thread->appdomain_refs);
3455 SPIN_UNLOCK (thread->lock_thread_id);
3460 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3463 SPIN_LOCK (thread->lock_thread_id);
3464 res = ref_stack_find (thread->appdomain_refs, domain);
3465 SPIN_UNLOCK (thread->lock_thread_id);
3470 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3472 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3475 typedef struct abort_appdomain_data {
3476 struct wait_data wait;
3478 } abort_appdomain_data;
3481 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3483 MonoInternalThread *thread = (MonoInternalThread*)value;
3484 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3485 MonoDomain *domain = data->domain;
3487 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3488 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3490 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3491 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3494 data->wait.handles [data->wait.num] = handle;
3495 data->wait.threads [data->wait.num] = thread;
3498 /* Just ignore the rest, we can't do anything with
3506 * mono_threads_abort_appdomain_threads:
3508 * Abort threads which has references to the given appdomain.
3511 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3513 #ifdef __native_client__
3517 abort_appdomain_data user_data;
3519 int orig_timeout = timeout;
3522 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3524 start_time = mono_msec_ticks ();
3526 mono_threads_lock ();
3528 user_data.domain = domain;
3529 user_data.wait.num = 0;
3530 /* This shouldn't take any locks */
3531 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3532 mono_threads_unlock ();
3534 if (user_data.wait.num > 0) {
3535 /* Abort the threads outside the threads lock */
3536 for (i = 0; i < user_data.wait.num; ++i)
3537 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3540 * We should wait for the threads either to abort, or to leave the
3541 * domain. We can't do the latter, so we wait with a timeout.
3543 wait_for_tids (&user_data.wait, 100);
3546 /* Update remaining time */
3547 timeout -= mono_msec_ticks () - start_time;
3548 start_time = mono_msec_ticks ();
3550 if (orig_timeout != -1 && timeout < 0)
3553 while (user_data.wait.num > 0);
3555 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3561 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3563 MonoInternalThread *thread = (MonoInternalThread*)value;
3564 MonoDomain *domain = (MonoDomain*)user_data;
3567 /* No locking needed here */
3568 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3570 if (thread->cached_culture_info) {
3571 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3572 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3573 if (obj && obj->vtable->domain == domain)
3574 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3580 * mono_threads_clear_cached_culture:
3582 * Clear the cached_current_culture from all threads if it is in the
3586 mono_threads_clear_cached_culture (MonoDomain *domain)
3588 mono_threads_lock ();
3589 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3590 mono_threads_unlock ();
3594 * mono_thread_get_undeniable_exception:
3596 * Return an exception which needs to be raised when leaving a catch clause.
3597 * This is used for undeniable exception propagation.
3600 mono_thread_get_undeniable_exception (void)
3602 MonoInternalThread *thread = mono_thread_internal_current ();
3604 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3606 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3607 * exception if the thread no longer references a dying appdomain.
3609 thread->abort_exc->trace_ips = NULL;
3610 thread->abort_exc->stack_trace = NULL;
3611 return thread->abort_exc;
3617 #if MONO_SMALL_CONFIG
3618 #define NUM_STATIC_DATA_IDX 4
3619 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3623 #define NUM_STATIC_DATA_IDX 8
3624 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3625 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3629 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3632 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3635 gpointer *static_data = addr;
3636 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3639 if (!static_data [i])
3641 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3642 ptr = static_data [i];
3643 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3644 uintptr_t bmap = static_reference_bitmaps [i][j];
3647 if ((bmap & 1) && *p) {
3648 mark_func (p, gc_data);
3658 * mono_alloc_static_data
3660 * Allocate memory blocks for storing threads or context static data
3663 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3665 guint idx = (offset >> 24) - 1;
3668 gpointer* static_data = *static_data_ptr;
3670 static void* tls_desc = NULL;
3671 if (mono_gc_user_markers_supported () && !tls_desc)
3672 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3673 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3674 *static_data_ptr = static_data;
3675 static_data [0] = static_data;
3678 for (i = 1; i <= idx; ++i) {
3679 if (static_data [i])
3681 if (mono_gc_user_markers_supported () && threadlocal)
3682 static_data [i] = g_malloc0 (static_data_size [i]);
3684 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3689 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3692 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3693 gpointer p = static_data [i];
3697 * At this point, the static data pointer array is still registered with the
3698 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3699 * data. Freeing the individual arrays without first nulling their slots
3700 * would make it possible for mark_tls_slots() to encounter a pointer to
3701 * such an already freed array. See bug #13813.
3703 static_data [i] = NULL;
3704 mono_memory_write_barrier ();
3705 if (mono_gc_user_markers_supported () && threadlocal)
3708 mono_gc_free_fixed (p);
3710 mono_gc_free_fixed (static_data);
3714 * mono_init_static_data_info
3716 * Initializes static data counters
3718 static void mono_init_static_data_info (StaticDataInfo *static_data)
3720 static_data->idx = 0;
3721 static_data->offset = 0;
3722 static_data->freelist = NULL;
3726 * mono_alloc_static_data_slot
3728 * Generates an offset for static data. static_data contains the counters
3729 * used to generate it.
3732 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3736 if (!static_data->idx && !static_data->offset) {
3738 * we use the first chunk of the first allocation also as
3739 * an array for the rest of the data
3741 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3743 static_data->offset += align - 1;
3744 static_data->offset &= ~(align - 1);
3745 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3746 static_data->idx ++;
3747 g_assert (size <= static_data_size [static_data->idx]);
3748 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3749 static_data->offset = 0;
3751 offset = static_data->offset | ((static_data->idx + 1) << 24);
3752 static_data->offset += size;
3757 * ensure thread static fields already allocated are valid for thread
3758 * This function is called when a thread is created or on thread attach.
3761 thread_adjust_static_data (MonoInternalThread *thread)
3765 mono_threads_lock ();
3766 if (thread_static_info.offset || thread_static_info.idx > 0) {
3767 /* get the current allocated size */
3768 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3769 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3771 mono_threads_unlock ();
3775 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3777 MonoInternalThread *thread = value;
3778 guint32 offset = GPOINTER_TO_UINT (user);
3780 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3783 static MonoThreadDomainTls*
3784 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3786 MonoThreadDomainTls* prev = NULL;
3787 MonoThreadDomainTls* tmp = static_data->freelist;
3789 if (tmp->size == size) {
3791 prev->next = tmp->next;
3793 static_data->freelist = tmp->next;
3802 #if SIZEOF_VOID_P == 4
3809 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3812 int idx = (offset >> 24) - 1;
3814 if (!static_reference_bitmaps [idx])
3815 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3816 rb = static_reference_bitmaps [idx];
3818 offset /= sizeof (gpointer);
3819 /* offset is now the bitmap offset */
3820 for (i = 0; i < numbits; ++i) {
3821 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3822 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (ONE_P << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3827 clear_reference_bitmap (guint32 offset, guint32 size)
3829 int idx = (offset >> 24) - 1;
3831 rb = static_reference_bitmaps [idx];
3833 offset /= sizeof (gpointer);
3834 size /= sizeof (gpointer);
3836 /* offset is now the bitmap offset */
3837 for (; offset < size; ++offset)
3838 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3842 * The offset for a special static variable is composed of three parts:
3843 * a bit that indicates the type of static data (0:thread, 1:context),
3844 * an index in the array of chunks of memory for the thread (thread->static_data)
3845 * and an offset in that chunk of mem. This allows allocating less memory in the
3850 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3853 if (static_type == SPECIAL_STATIC_THREAD) {
3854 MonoThreadDomainTls *item;
3855 mono_threads_lock ();
3856 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3857 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3859 offset = item->offset;
3862 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3864 update_tls_reference_bitmap (offset, bitmap, numbits);
3865 /* This can be called during startup */
3866 if (threads != NULL)
3867 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3868 mono_threads_unlock ();
3870 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3871 mono_contexts_lock ();
3872 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3873 mono_contexts_unlock ();
3874 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3880 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3882 /* The high bit means either thread (0) or static (1) data. */
3884 guint32 static_type = (offset & 0x80000000);
3887 offset &= 0x7fffffff;
3888 idx = (offset >> 24) - 1;
3890 if (static_type == 0) {
3891 return get_thread_static_data (thread, offset);
3893 /* Allocate static data block under demand, since we don't have a list
3896 MonoAppContext *context = mono_context_get ();
3897 if (!context->static_data || !context->static_data [idx]) {
3898 mono_contexts_lock ();
3899 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3900 mono_contexts_unlock ();
3902 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3907 mono_get_special_static_data (guint32 offset)
3909 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3918 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3920 MonoInternalThread *thread = value;
3921 TlsOffsetSize *data = user;
3922 int idx = (data->offset >> 24) - 1;
3925 if (!thread->static_data || !thread->static_data [idx])
3927 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3928 mono_gc_bzero_atomic (ptr, data->size);
3932 do_free_special_slot (guint32 offset, guint32 size)
3934 guint32 static_type = (offset & 0x80000000);
3935 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3936 if (static_type == 0) {
3938 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3939 data.offset = offset & 0x7fffffff;
3941 clear_reference_bitmap (data.offset, data.size);
3942 if (threads != NULL)
3943 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3944 item->offset = offset;
3947 if (!mono_runtime_is_shutting_down ()) {
3948 item->next = thread_static_info.freelist;
3949 thread_static_info.freelist = item;
3951 /* We could be called during shutdown after mono_thread_cleanup () is called */
3955 /* FIXME: free context static data as well */
3960 do_free_special (gpointer key, gpointer value, gpointer data)
3962 MonoClassField *field = key;
3963 guint32 offset = GPOINTER_TO_UINT (value);
3966 size = mono_type_size (field->type, &align);
3967 do_free_special_slot (offset, size);
3971 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3973 mono_threads_lock ();
3974 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 mono_threads_lock ();
3982 do_free_special_slot (offset, size);
3983 mono_threads_unlock ();
3987 * allocates room in the thread local area for storing an instance of the struct type
3988 * the allocation is kept track of in domain->tlsrec_list.
3991 mono_thread_alloc_tls (MonoReflectionType *type)
3993 MonoDomain *domain = mono_domain_get ();
3995 MonoTlsDataRecord *tlsrec;
3998 gsize default_bitmap [4] = {0};
3999 uint32_t tls_offset;
4003 klass = mono_class_from_mono_type (type->type);
4004 /* TlsDatum is a struct, so we subtract the object header size offset */
4005 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
4006 size = mono_type_size (type->type, &align);
4007 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
4008 if (bitmap != default_bitmap)
4010 tlsrec = g_new0 (MonoTlsDataRecord, 1);
4011 tlsrec->tls_offset = tls_offset;
4012 tlsrec->size = size;
4013 mono_domain_lock (domain);
4014 tlsrec->next = domain->tlsrec_list;
4015 domain->tlsrec_list = tlsrec;
4016 mono_domain_unlock (domain);
4021 destroy_tls (MonoDomain *domain, uint32_t tls_offset)
4023 MonoTlsDataRecord *prev = NULL;
4024 MonoTlsDataRecord *cur;
4027 mono_domain_lock (domain);
4028 cur = domain->tlsrec_list;
4030 if (cur->tls_offset == tls_offset) {
4032 prev->next = cur->next;
4034 domain->tlsrec_list = cur->next;
4042 mono_domain_unlock (domain);
4044 mono_special_static_data_free_slot (tls_offset, size);
4048 mono_thread_destroy_tls (uint32_t tls_offset)
4050 destroy_tls (mono_domain_get (), tls_offset);
4054 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4057 mono_thread_destroy_domain_tls (MonoDomain *domain)
4059 while (domain->tlsrec_list)
4060 destroy_tls (domain, domain->tlsrec_list->tls_offset);
4063 static MonoClassField *local_slots = NULL;
4066 /* local tls data to get locals_slot from a thread */
4069 /* index in the locals_slot array */
4074 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4076 LocalSlotID *sid = user_data;
4077 MonoInternalThread *thread = (MonoInternalThread*)value;
4078 MonoArray *slots_array;
4080 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4081 * it is for the right domain, so we need to check if it is allocated an initialized
4082 * for the current thread.
4084 /*g_print ("handling thread %p\n", thread);*/
4085 if (!thread->static_data || !thread->static_data [sid->idx])
4087 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4088 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4090 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4094 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4102 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4104 g_warning ("local_slots field not found in Thread class");
4108 domain = mono_domain_get ();
4109 mono_domain_lock (domain);
4110 if (domain->special_static_fields)
4111 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4112 mono_domain_unlock (domain);
4115 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4116 sid.offset = GPOINTER_TO_UINT (addr);
4117 sid.offset &= 0x7fffffff;
4118 sid.idx = (sid.offset >> 24) - 1;
4119 mono_threads_lock ();
4120 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4121 mono_threads_unlock ();
4123 /* FIXME: clear the slot for MonoAppContexts, too */
4128 static void CALLBACK dummy_apc (ULONG_PTR param)
4134 * mono_thread_execute_interruption
4136 * Performs the operation that the requested thread state requires (abort,
4139 static MonoException*
4140 mono_thread_execute_interruption (MonoInternalThread *thread)
4142 LOCK_THREAD (thread);
4144 /* MonoThread::interruption_requested can only be changed with atomics */
4145 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4146 /* this will consume pending APC calls */
4148 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4150 InterlockedDecrement (&thread_interruption_requested);
4151 /* Clear the interrupted flag of the thread so it can wait again */
4152 mono_thread_info_clear_interruption ();
4155 if ((thread->state & ThreadState_AbortRequested) != 0) {
4156 UNLOCK_THREAD (thread);
4157 if (thread->abort_exc == NULL) {
4159 * This might be racy, but it has to be called outside the lock
4160 * since it calls managed code.
4162 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4164 return thread->abort_exc;
4166 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4167 self_suspend_internal (thread);
4170 else if ((thread->state & ThreadState_StopRequested) != 0) {
4171 /* FIXME: do this through the JIT? */
4173 UNLOCK_THREAD (thread);
4175 mono_thread_exit ();
4177 } else if (thread->pending_exception) {
4180 exc = thread->pending_exception;
4181 thread->pending_exception = NULL;
4183 UNLOCK_THREAD (thread);
4185 } else if (thread->thread_interrupt_requested) {
4187 thread->thread_interrupt_requested = FALSE;
4188 UNLOCK_THREAD (thread);
4190 return(mono_get_exception_thread_interrupted ());
4193 UNLOCK_THREAD (thread);
4199 * mono_thread_request_interruption
4201 * A signal handler can call this method to request the interruption of a
4202 * thread. The result of the interruption will depend on the current state of
4203 * the thread. If the result is an exception that needs to be throw, it is
4204 * provided as return value.
4207 mono_thread_request_interruption (gboolean running_managed)
4209 MonoInternalThread *thread = mono_thread_internal_current ();
4211 /* The thread may already be stopping */
4216 if (thread->interrupt_on_stop &&
4217 thread->state & ThreadState_StopRequested &&
4218 thread->state & ThreadState_Background)
4222 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4224 InterlockedIncrement (&thread_interruption_requested);
4226 if (!running_managed || is_running_protected_wrapper ()) {
4227 /* Can't stop while in unmanaged code. Increase the global interruption
4228 request count. When exiting the unmanaged method the count will be
4229 checked and the thread will be interrupted. */
4231 if (mono_thread_notify_pending_exc_fn && !running_managed)
4232 /* The JIT will notify the thread about the interruption */
4233 /* This shouldn't take any locks */
4234 mono_thread_notify_pending_exc_fn (NULL);
4236 /* this will awake the thread if it is in WaitForSingleObject
4238 /* Our implementation of this function ignores the func argument */
4240 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4242 mono_thread_info_self_interrupt ();
4247 return mono_thread_execute_interruption (thread);
4251 /*This function should be called by a thread after it has exited all of
4252 * its handle blocks at interruption time.*/
4254 mono_thread_resume_interruption (void)
4256 MonoInternalThread *thread = mono_thread_internal_current ();
4257 gboolean still_aborting;
4259 /* The thread may already be stopping */
4263 LOCK_THREAD (thread);
4264 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4265 UNLOCK_THREAD (thread);
4267 /*This can happen if the protected block called Thread::ResetAbort*/
4268 if (!still_aborting)
4271 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4273 InterlockedIncrement (&thread_interruption_requested);
4275 mono_thread_info_self_interrupt ();
4277 return mono_thread_execute_interruption (thread);
4280 gboolean mono_thread_interruption_requested ()
4282 if (thread_interruption_requested) {
4283 MonoInternalThread *thread = mono_thread_internal_current ();
4284 /* The thread may already be stopping */
4286 return (thread->interruption_requested);
4291 static MonoException*
4292 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4294 MonoInternalThread *thread = mono_thread_internal_current ();
4296 /* The thread may already be stopping */
4300 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4301 MonoException* exc = mono_thread_execute_interruption (thread);
4309 * Performs the interruption of the current thread, if one has been requested,
4310 * and the thread is not running a protected wrapper.
4311 * Return the exception which needs to be thrown, if any.
4314 mono_thread_interruption_checkpoint (void)
4316 return mono_thread_interruption_checkpoint_request (FALSE);
4320 * Performs the interruption of the current thread, if one has been requested.
4321 * Return the exception which needs to be thrown, if any.
4324 mono_thread_force_interruption_checkpoint_noraise (void)
4326 return mono_thread_interruption_checkpoint_request (TRUE);
4330 * Performs the interruption of the current thread, if one has been requested.
4331 * Throw the exception which needs to be thrown, if any.
4334 mono_thread_force_interruption_checkpoint (void)
4338 ex = mono_thread_interruption_checkpoint_request (TRUE);
4340 mono_raise_exception (ex);
4344 * mono_thread_get_and_clear_pending_exception:
4346 * Return any pending exceptions for the current thread and clear it as a side effect.
4349 mono_thread_get_and_clear_pending_exception (void)
4351 MonoInternalThread *thread = mono_thread_internal_current ();
4353 /* The thread may already be stopping */
4357 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4358 return mono_thread_execute_interruption (thread);
4361 if (thread->pending_exception) {
4362 MonoException *exc = thread->pending_exception;
4364 thread->pending_exception = NULL;
4372 * mono_set_pending_exception:
4374 * Set the pending exception of the current thread to EXC.
4375 * The exception will be thrown when execution returns to managed code.
4378 mono_set_pending_exception (MonoException *exc)
4380 MonoInternalThread *thread = mono_thread_internal_current ();
4382 /* The thread may already be stopping */
4386 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4388 mono_thread_request_interruption (FALSE);
4392 * mono_thread_interruption_request_flag:
4394 * Returns the address of a flag that will be non-zero if an interruption has
4395 * been requested for a thread. The thread to interrupt may not be the current
4396 * thread, so an additional call to mono_thread_interruption_requested() or
4397 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4400 gint32* mono_thread_interruption_request_flag ()
4402 return &thread_interruption_requested;
4406 mono_thread_init_apartment_state (void)
4409 MonoInternalThread* thread = mono_thread_internal_current ();
4411 /* Positive return value indicates success, either
4412 * S_OK if this is first CoInitialize call, or
4413 * S_FALSE if CoInitialize already called, but with same
4414 * threading model. A negative value indicates failure,
4415 * probably due to trying to change the threading model.
4417 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4418 ? COINIT_APARTMENTTHREADED
4419 : COINIT_MULTITHREADED) < 0) {
4420 thread->apartment_state = ThreadApartmentState_Unknown;
4426 mono_thread_cleanup_apartment_state (void)
4429 MonoInternalThread* thread = mono_thread_internal_current ();
4431 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4438 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4440 LOCK_THREAD (thread);
4441 thread->state |= state;
4442 UNLOCK_THREAD (thread);
4446 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4448 LOCK_THREAD (thread);
4449 thread->state &= ~state;
4450 UNLOCK_THREAD (thread);
4454 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4456 gboolean ret = FALSE;
4458 LOCK_THREAD (thread);
4460 if ((thread->state & test) != 0) {
4464 UNLOCK_THREAD (thread);
4469 //static MonoClassField *execution_context_field;
4472 get_execution_context_addr (void)
4474 MonoDomain *domain = mono_domain_get ();
4475 guint32 offset = domain->execution_context_field_offset;
4478 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4481 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4483 mono_domain_lock (domain);
4484 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4485 mono_domain_unlock (domain);
4488 domain->execution_context_field_offset = offset;
4491 return (MonoObject**) mono_get_special_static_data (offset);
4495 mono_thread_get_execution_context (void)
4497 return *get_execution_context_addr ();
4501 mono_thread_set_execution_context (MonoObject *ec)
4503 *get_execution_context_addr () = ec;
4506 static gboolean has_tls_get = FALSE;
4509 mono_runtime_set_has_tls_get (gboolean val)
4515 mono_runtime_has_tls_get (void)
4521 mono_thread_kill (MonoInternalThread *thread, int signal)
4523 #ifdef __native_client__
4524 /* Workaround pthread_kill abort() in NaCl glibc. */
4527 #if defined (HOST_WIN32) || !defined (HAVE_SIGACTION)
4528 /* Win32 uses QueueUserAPC and callers of this are guarded */
4529 g_assert_not_reached ();
4531 # ifdef PTHREAD_POINTER_ID
4532 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4534 # ifdef USE_TKILL_ON_ANDROID
4535 if (thread->android_tid != 0) {
4537 int old_errno = errno;
4539 ret = tkill ((pid_t) thread->android_tid, signal);
4548 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4550 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4557 self_interrupt_thread (void *_unused)
4559 MonoThreadInfo *info = mono_thread_info_current ();
4560 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4561 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4562 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. */
4563 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4567 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4571 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4575 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4577 MonoJitInfo **dest = data;
4583 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4585 MonoJitInfo *ji = NULL;
4588 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4593 MonoInternalThread *thread;
4594 gboolean install_async_abort;
4595 gpointer interrupt_handle;
4598 static SuspendThreadResult
4599 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4601 AbortThreadData *data = ud;
4602 MonoInternalThread *thread = data->thread;
4603 MonoJitInfo *ji = NULL;
4604 gboolean protected_wrapper;
4605 gboolean running_managed;
4607 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4608 return MonoResumeThread;
4610 /*someone is already interrupting it*/
4611 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4612 return MonoResumeThread;
4614 InterlockedIncrement (&thread_interruption_requested);
4616 ji = mono_thread_info_get_last_managed (info);
4617 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4618 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4620 if (!protected_wrapper && running_managed) {
4621 /*We are in managed code*/
4622 /*Set the thread to call */
4623 if (data->install_async_abort)
4624 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4625 return MonoResumeThread;
4627 if (mono_thread_notify_pending_exc_fn)
4628 /* The JIT will notify the thread about the interruption */
4629 mono_thread_notify_pending_exc_fn (info);
4632 * This will cause waits to be broken.
4633 * It will also prevent the thread from entering a wait, so if the thread returns
4634 * from the wait before it receives the abort signal, it will just spin in the wait
4635 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4638 data->interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4639 return MonoResumeThread;
4644 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4646 AbortThreadData data = { 0 };
4647 data.thread = thread;
4648 data.install_async_abort = install_async_abort;
4650 if (!mono_thread_info_new_interrupt_enabled ()) {
4651 signal_thread_state_change (thread);
4656 FIXME this is insanely broken, it doesn't cause interruption to happen
4657 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4659 if (thread == mono_thread_internal_current ()) {
4660 /* Do it synchronously */
4661 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4663 mono_raise_exception (exc);
4664 mono_thread_info_interrupt (thread->handle);
4668 mono_thread_info_safe_suspend_and_run ((MonoNativeThreadId)(gsize)thread->tid, TRUE, abort_thread_critical, &data);
4669 if (data.interrupt_handle)
4670 mono_thread_info_finish_interrupt (data.interrupt_handle);
4671 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4675 MonoInternalThread *thread;
4677 gpointer interrupt_handle;
4678 } SuspendThreadData;
4680 static SuspendThreadResult
4681 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4683 SuspendThreadData *data = ud;
4684 MonoInternalThread *thread = data->thread;
4685 MonoJitInfo *ji = NULL;
4686 gboolean protected_wrapper;
4687 gboolean running_managed;
4689 ji = mono_thread_info_get_last_managed (info);
4690 protected_wrapper = ji && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4691 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4693 if (running_managed && !protected_wrapper) {
4694 thread->state &= ~ThreadState_SuspendRequested;
4695 thread->state |= ThreadState_Suspended;
4696 return KeepSuspended;
4698 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4699 InterlockedIncrement (&thread_interruption_requested);
4700 if (data->interrupt)
4701 data->interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4703 if (mono_thread_notify_pending_exc_fn && !running_managed)
4704 /* The JIT will notify the thread about the interruption */
4705 mono_thread_notify_pending_exc_fn (info);
4706 return MonoResumeThread;
4711 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4713 if (!mono_thread_info_new_interrupt_enabled ()) {
4714 signal_thread_state_change (thread);
4718 LOCK_THREAD (thread);
4719 if (thread == mono_thread_internal_current ()) {
4720 mono_thread_info_begin_self_suspend ();
4721 //XXX replace this with better named functions
4722 thread->state &= ~ThreadState_SuspendRequested;
4723 thread->state |= ThreadState_Suspended;
4724 UNLOCK_THREAD (thread);
4725 mono_thread_info_end_self_suspend ();
4727 SuspendThreadData data = { 0 };
4728 data.thread = thread;
4729 data.interrupt = interrupt;
4731 mono_thread_info_safe_suspend_and_run ((MonoNativeThreadId)(gsize)thread->tid, interrupt, suspend_thread_critical, &data);
4732 if (data.interrupt_handle)
4733 mono_thread_info_finish_interrupt (data.interrupt_handle);
4734 UNLOCK_THREAD (thread);
4738 /*This is called with @thread synch_cs held and it must release it*/
4740 self_suspend_internal (MonoInternalThread *thread)
4742 if (!mono_thread_info_new_interrupt_enabled ()) {
4743 thread->state &= ~ThreadState_SuspendRequested;
4744 thread->state |= ThreadState_Suspended;
4745 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4746 if (thread->suspend_event == NULL) {
4747 UNLOCK_THREAD (thread);
4750 if (thread->suspended_event)
4751 SetEvent (thread->suspended_event);
4753 UNLOCK_THREAD (thread);
4755 if (shutting_down) {
4756 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4761 WaitForSingleObject (thread->suspend_event, INFINITE);
4763 LOCK_THREAD (thread);
4765 CloseHandle (thread->suspend_event);
4766 thread->suspend_event = NULL;
4767 thread->state &= ~ThreadState_Suspended;
4769 /* The thread that requested the resume will have replaced this event
4770 * and will be waiting for it
4772 SetEvent (thread->resume_event);
4774 UNLOCK_THREAD (thread);
4778 mono_thread_info_begin_self_suspend ();
4779 thread->state &= ~ThreadState_SuspendRequested;
4780 thread->state |= ThreadState_Suspended;
4781 UNLOCK_THREAD (thread);
4782 mono_thread_info_end_self_suspend ();
4785 /*This is called with @thread synch_cs held and it must release it*/
4787 resume_thread_internal (MonoInternalThread *thread)
4789 if (!mono_thread_info_new_interrupt_enabled ()) {
4790 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4791 if (thread->resume_event == NULL) {
4792 UNLOCK_THREAD (thread);
4796 /* Awake the thread */
4797 SetEvent (thread->suspend_event);
4799 UNLOCK_THREAD (thread);
4801 /* Wait for the thread to awake */
4802 WaitForSingleObject (thread->resume_event, INFINITE);
4803 CloseHandle (thread->resume_event);
4804 thread->resume_event = NULL;
4808 UNLOCK_THREAD (thread);
4809 /* Awake the thread */
4810 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4812 LOCK_THREAD (thread);
4813 thread->state &= ~ThreadState_Suspended;
4814 UNLOCK_THREAD (thread);
4820 * mono_thread_is_foreign:
4821 * @thread: the thread to query
4823 * This function allows one to determine if a thread was created by the mono runtime and has
4824 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4826 * Returns: true if @thread was not created by the runtime.
4829 mono_thread_is_foreign (MonoThread *thread)
4831 MonoThreadInfo *info = thread->internal_thread->thread_info;
4832 return info->runtime_thread == FALSE;
4836 * mono_add_joinable_thread:
4838 * Add TID to the list of joinable threads.
4839 * LOCKING: Acquires the threads lock.
4842 mono_threads_add_joinable_thread (gpointer tid)
4846 * We cannot detach from threads because it causes problems like
4847 * 2fd16f60/r114307. So we collect them and join them when
4848 * we have time (in he finalizer thread).
4850 joinable_threads_lock ();
4851 if (!joinable_threads)
4852 joinable_threads = g_hash_table_new (NULL, NULL);
4853 g_hash_table_insert (joinable_threads, tid, tid);
4854 joinable_thread_count ++;
4855 joinable_threads_unlock ();
4857 mono_gc_finalize_notify ();
4862 * mono_threads_join_threads:
4864 * Join all joinable threads. This is called from the finalizer thread.
4865 * LOCKING: Acquires the threads lock.
4868 mono_threads_join_threads (void)
4871 GHashTableIter iter;
4878 if (!joinable_thread_count)
4882 joinable_threads_lock ();
4884 if (g_hash_table_size (joinable_threads)) {
4885 g_hash_table_iter_init (&iter, joinable_threads);
4886 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4887 thread = (pthread_t)tid;
4888 g_hash_table_remove (joinable_threads, key);
4889 joinable_thread_count --;
4892 joinable_threads_unlock ();
4894 if (thread != pthread_self ())
4895 /* This shouldn't block */
4896 pthread_join (thread, NULL);
4907 * Wait for thread TID to exit.
4908 * LOCKING: Acquires the threads lock.
4911 mono_thread_join (gpointer tid)
4915 gboolean found = FALSE;
4917 joinable_threads_lock ();
4918 if (!joinable_threads)
4919 joinable_threads = g_hash_table_new (NULL, NULL);
4920 if (g_hash_table_lookup (joinable_threads, tid)) {
4921 g_hash_table_remove (joinable_threads, tid);
4922 joinable_thread_count --;
4925 joinable_threads_unlock ();
4928 thread = (pthread_t)tid;
4929 pthread_join (thread, NULL);