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/threads-types.h>
24 #include <mono/metadata/exception.h>
25 #include <mono/metadata/environment.h>
26 #include <mono/metadata/monitor.h>
27 #include <mono/metadata/gc-internals.h>
28 #include <mono/metadata/marshal.h>
29 #include <mono/metadata/runtime.h>
30 #include <mono/io-layer/io-layer.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/mono-debug-debugger.h>
33 #include <mono/utils/monobitset.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-internals.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 _StaticDataFreeList StaticDataFreeList;
108 struct _StaticDataFreeList {
109 StaticDataFreeList *next;
117 StaticDataFreeList *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 static void mono_threads_lock (void);
130 static void mono_threads_unlock (void);
131 static MonoCoopMutex threads_mutex;
133 /* Controls access to the 'joinable_threads' hash table */
134 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
135 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
136 static mono_mutex_t joinable_threads_mutex;
138 /* Holds current status of static data heap */
139 static StaticDataInfo thread_static_info;
140 static StaticDataInfo context_static_info;
142 /* The hash of existing threads (key is thread ID, value is
143 * MonoInternalThread*) that need joining before exit
145 static MonoGHashTable *threads=NULL;
147 /* List of app context GC handles.
148 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
150 static GHashTable *contexts = NULL;
152 /* Cleanup queue for contexts. */
153 static MonoReferenceQueue *context_queue;
156 * Threads which are starting up and they are not in the 'threads' hash yet.
157 * When handle_store is called for a thread, it will be removed from this hash table.
158 * Protected by mono_threads_lock ().
160 static MonoGHashTable *threads_starting_up = NULL;
162 /* The TLS key that holds the MonoObject assigned to each thread */
163 static MonoNativeTlsKey current_object_key;
166 /* Protected by the threads lock */
167 static GHashTable *joinable_threads;
168 static int joinable_thread_count;
170 #ifdef MONO_HAVE_FAST_TLS
171 /* we need to use both the Tls* functions and __thread because
172 * the gc needs to see all the threads
174 MONO_FAST_TLS_DECLARE(tls_current_object);
175 #define SET_CURRENT_OBJECT(x) do { \
176 MONO_FAST_TLS_SET (tls_current_object, x); \
177 mono_native_tls_set_value (current_object_key, x); \
179 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
181 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
182 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
185 /* function called at thread start */
186 static MonoThreadStartCB mono_thread_start_cb = NULL;
188 /* function called at thread attach */
189 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
191 /* function called at thread cleanup */
192 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
194 /* function called to notify the runtime about a pending exception on the current thread */
195 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
197 /* The default stack size for each thread */
198 static guint32 default_stacksize = 0;
199 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
201 static void thread_adjust_static_data (MonoInternalThread *thread);
202 static void context_adjust_static_data (MonoAppContext *ctx);
203 static void mono_free_static_data (gpointer* static_data);
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 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
208 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (MonoInternalThread *thread);
211 static MonoException* mono_thread_execute_interruption (void);
212 static void ref_stack_destroy (gpointer rs);
214 /* Spin lock for InterlockedXXX 64 bit functions */
215 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
216 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
217 static mono_mutex_t interlocked_mutex;
219 /* global count of thread interruptions requested */
220 static gint32 thread_interruption_requested = 0;
222 /* Event signaled when a thread changes its background mode */
223 static HANDLE background_change_event;
225 static gboolean shutting_down = FALSE;
227 static gint32 managed_thread_id_counter = 0;
230 mono_threads_lock (void)
232 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
236 mono_threads_unlock (void)
238 mono_locks_coop_release (&threads_mutex, ThreadsLock);
243 get_next_managed_thread_id (void)
245 return InterlockedIncrement (&managed_thread_id_counter);
249 mono_thread_get_tls_key (void)
251 return current_object_key;
255 mono_thread_get_tls_offset (void)
258 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
262 static inline MonoNativeThreadId
263 thread_get_tid (MonoInternalThread *thread)
265 /* We store the tid as a guint64 to keep the object layout constant between platforms */
266 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
269 /* handle_store() and handle_remove() manage the array of threads that
270 * still need to be waited for when the main thread exits.
272 * If handle_store() returns FALSE the thread must not be started
273 * because Mono is shutting down.
275 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
277 mono_threads_lock ();
279 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
281 if (threads_starting_up)
282 mono_g_hash_table_remove (threads_starting_up, thread);
284 if (shutting_down && !force_attach) {
285 mono_threads_unlock ();
290 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
291 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
294 /* We don't need to duplicate thread->handle, because it is
295 * only closed when the thread object is finalized by the GC.
297 g_assert (thread->internal_thread);
298 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
299 thread->internal_thread);
301 mono_threads_unlock ();
306 static gboolean handle_remove(MonoInternalThread *thread)
309 gsize tid = thread->tid;
311 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
313 mono_threads_lock ();
316 /* We have to check whether the thread object for the
317 * tid is still the same in the table because the
318 * thread might have been destroyed and the tid reused
319 * in the meantime, in which case the tid would be in
320 * the table, but with another thread object.
322 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
323 mono_g_hash_table_remove (threads, (gpointer)tid);
332 mono_threads_unlock ();
334 /* Don't close the handle here, wait for the object finalizer
335 * to do it. Otherwise, the following race condition applies:
337 * 1) Thread exits (and handle_remove() closes the handle)
339 * 2) Some other handle is reassigned the same slot
341 * 3) Another thread tries to join the first thread, and
342 * blocks waiting for the reassigned handle to be signalled
343 * (which might never happen). This is possible, because the
344 * thread calling Join() still has a reference to the first
350 static void ensure_synch_cs_set (MonoInternalThread *thread)
352 MonoCoopMutex *synch_cs;
354 if (thread->synch_cs != NULL) {
358 synch_cs = g_new0 (MonoCoopMutex, 1);
359 mono_coop_mutex_init_recursive (synch_cs);
361 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
362 synch_cs, NULL) != NULL) {
363 /* Another thread must have installed this CS */
364 mono_coop_mutex_destroy (synch_cs);
370 lock_thread (MonoInternalThread *thread)
372 if (!thread->synch_cs)
373 ensure_synch_cs_set (thread);
375 g_assert (thread->synch_cs);
377 mono_coop_mutex_lock (thread->synch_cs);
381 unlock_thread (MonoInternalThread *thread)
383 mono_coop_mutex_unlock (thread->synch_cs);
387 * NOTE: this function can be called also for threads different from the current one:
388 * make sure no code called from it will ever assume it is run on the thread that is
389 * getting cleaned up.
391 static void thread_cleanup (MonoInternalThread *thread)
393 g_assert (thread != NULL);
395 if (thread->abort_state_handle) {
396 mono_gchandle_free (thread->abort_state_handle);
397 thread->abort_state_handle = 0;
399 thread->abort_exc = NULL;
400 thread->current_appcontext = NULL;
403 * This is necessary because otherwise we might have
404 * cross-domain references which will not get cleaned up when
405 * the target domain is unloaded.
407 if (thread->cached_culture_info) {
409 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
410 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
414 * thread->synch_cs can be NULL if this was called after
415 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
416 * This can happen only during shutdown.
417 * The shutting_down flag is not always set, so we can't assert on it.
419 if (thread->synch_cs)
420 LOCK_THREAD (thread);
422 thread->state |= ThreadState_Stopped;
423 thread->state &= ~ThreadState_Background;
425 if (thread->synch_cs)
426 UNLOCK_THREAD (thread);
429 An interruption request has leaked to cleanup. Adjust the global counter.
431 This can happen is the abort source thread finds the abortee (this) thread
432 in unmanaged code. If this thread never trips back to managed code or check
433 the local flag it will be left set and positively unbalance the global counter.
435 Leaving the counter unbalanced will cause a performance degradation since all threads
436 will now keep checking their local flags all the time.
438 if (InterlockedExchange (&thread->interruption_requested, 0))
439 InterlockedDecrement (&thread_interruption_requested);
441 /* if the thread is not in the hash it has been removed already */
442 if (!handle_remove (thread)) {
443 if (thread == mono_thread_internal_current ()) {
444 mono_domain_unset ();
445 mono_memory_barrier ();
447 /* This needs to be called even if handle_remove () fails */
448 if (mono_thread_cleanup_fn)
449 mono_thread_cleanup_fn (thread_get_tid (thread));
452 mono_release_type_locks (thread);
454 mono_profiler_thread_end (thread->tid);
456 if (thread == mono_thread_internal_current ()) {
458 * This will signal async signal handlers that the thread has exited.
459 * The profiler callback needs this to be set, so it cannot be done earlier.
461 mono_domain_unset ();
462 mono_memory_barrier ();
465 if (thread == mono_thread_internal_current ())
466 mono_thread_pop_appdomain_ref ();
468 thread->cached_culture_info = NULL;
470 mono_free_static_data (thread->static_data);
471 thread->static_data = NULL;
472 ref_stack_destroy (thread->appdomain_refs);
473 thread->appdomain_refs = NULL;
475 if (mono_thread_cleanup_fn)
476 mono_thread_cleanup_fn (thread_get_tid (thread));
478 if (mono_gc_is_moving ()) {
479 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
480 thread->thread_pinning_ref = NULL;
486 * A special static data offset (guint32) consists of 3 parts:
488 * [0] 6-bit index into the array of chunks.
489 * [6] 25-bit offset into the array.
490 * [31] Bit indicating thread or context static.
495 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
506 } SpecialStaticOffset;
508 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
509 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
511 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
512 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
513 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
514 (((SpecialStaticOffset *) &(x))->fields.f)
517 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
519 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
521 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
522 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
524 return ((char *) thread->static_data [idx]) + off;
528 get_context_static_data (MonoAppContext *ctx, guint32 offset)
530 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
532 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
533 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
535 return ((char *) ctx->static_data [idx]) + off;
539 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
541 static MonoClassField *current_thread_field = NULL;
545 if (!current_thread_field) {
546 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
547 g_assert (current_thread_field);
550 mono_class_vtable (domain, mono_defaults.thread_class);
551 mono_domain_lock (domain);
552 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
553 mono_domain_unlock (domain);
556 return (MonoThread **)get_thread_static_data (thread, offset);
560 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
562 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
564 g_assert (current->obj.vtable->domain == domain);
566 g_assert (!*current_thread_ptr);
567 *current_thread_ptr = current;
571 create_thread_object (MonoDomain *domain)
573 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
574 MonoThread *t = (MonoThread*)mono_object_new_mature (vt);
579 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
581 MonoThread *thread = create_thread_object (domain);
582 MONO_OBJECT_SETREF (thread, internal_thread, internal);
586 static MonoInternalThread*
587 create_internal_thread (void)
589 MonoInternalThread *thread;
592 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
593 thread = (MonoInternalThread*)mono_object_new_mature (vt);
595 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
596 mono_coop_mutex_init_recursive (thread->synch_cs);
598 thread->apartment_state = ThreadApartmentState_Unknown;
599 thread->managed_id = get_next_managed_thread_id ();
600 if (mono_gc_is_moving ()) {
601 thread->thread_pinning_ref = thread;
602 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
609 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
611 MonoDomain *domain = mono_get_root_domain ();
613 if (!candidate || candidate->obj.vtable->domain != domain)
614 candidate = new_thread_with_internal (domain, thread);
615 set_current_thread_for_domain (domain, thread, candidate);
616 g_assert (!thread->root_domain_thread);
617 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
620 static guint32 WINAPI start_wrapper_internal(void *data)
622 MonoThreadInfo *info;
623 StartInfo *start_info = (StartInfo *)data;
624 guint32 (*start_func)(void *);
628 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
631 MonoInternalThread *internal = start_info->obj->internal_thread;
632 MonoObject *start_delegate = start_info->delegate;
633 MonoDomain *domain = start_info->obj->obj.vtable->domain;
635 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
637 /* We can be sure start_info->obj->tid and
638 * start_info->obj->handle have been set, because the thread
639 * was created suspended, and these values were set before the
643 info = mono_thread_info_current ();
645 internal->thread_info = info;
646 internal->small_id = info->small_id;
650 SET_CURRENT_OBJECT (internal);
652 /* Every thread references the appdomain which created it */
653 mono_thread_push_appdomain_ref (domain);
655 if (!mono_domain_set (domain, FALSE)) {
656 /* No point in raising an appdomain_unloaded exception here */
657 /* FIXME: Cleanup here */
658 mono_thread_pop_appdomain_ref ();
662 start_func = start_info->func;
663 start_arg = start_info->obj->start_obj;
665 start_arg = start_info->start_arg;
667 /* We have to do this here because mono_thread_new_init()
668 requires that root_domain_thread is set up. */
669 thread_adjust_static_data (internal);
670 init_root_domain_thread (internal, start_info->obj);
672 /* This MUST be called before any managed code can be
673 * executed, as it calls the callback function that (for the
674 * jit) sets the lmf marker.
676 mono_thread_new_init (tid, &tid, start_func);
677 internal->stack_ptr = &tid;
678 if (domain != mono_get_root_domain ())
679 set_current_thread_for_domain (domain, internal, start_info->obj);
681 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
683 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
685 /* On 2.0 profile (and higher), set explicitly since state might have been
687 if (internal->apartment_state == ThreadApartmentState_Unknown)
688 internal->apartment_state = ThreadApartmentState_MTA;
690 mono_thread_init_apartment_state ();
692 if(internal->start_notify!=NULL) {
693 /* Let the thread that called Start() know we're
696 ReleaseSemaphore (internal->start_notify, 1, NULL);
700 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
704 * Call this after calling start_notify, since the profiler callback might want
705 * to lock the thread, and the lock is held by thread_start () which waits for
708 mono_profiler_thread_start (tid);
710 /* if the name was set before starting, we didn't invoke the profiler callback */
711 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
712 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
713 mono_profiler_thread_name (internal->tid, tname);
716 /* start_func is set only for unmanaged start functions */
718 start_func (start_arg);
721 g_assert (start_delegate != NULL);
722 args [0] = start_arg;
723 /* we may want to handle the exception here. See comment below on unhandled exceptions */
724 mono_runtime_delegate_invoke (start_delegate, args, NULL);
727 /* If the thread calls ExitThread at all, this remaining code
728 * will not be executed, but the main thread will eventually
729 * call thread_cleanup() on this thread's behalf.
732 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
734 /* Do any cleanup needed for apartment state. This
735 * cannot be done in thread_cleanup since thread_cleanup could be
736 * called for a thread other than the current thread.
737 * mono_thread_cleanup_apartment_state cleans up apartment
738 * for the current thead */
739 mono_thread_cleanup_apartment_state ();
741 thread_cleanup (internal);
745 /* Remove the reference to the thread object in the TLS data,
746 * so the thread object can be finalized. This won't be
747 * reached if the thread threw an uncaught exception, so those
748 * thread handles will stay referenced :-( (This is due to
749 * missing support for scanning thread-specific data in the
750 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
753 SET_CURRENT_OBJECT (NULL);
758 static guint32 WINAPI start_wrapper(void *data)
762 /* Avoid scanning the frames above this frame during a GC */
763 mono_gc_set_stack_end ((void*)&dummy);
765 return start_wrapper_internal (data);
771 * Common thread creation code.
772 * LOCKING: Acquires the threads lock.
775 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
776 gboolean throw_on_failure)
778 HANDLE thread_handle;
779 MonoNativeThreadId tid;
780 guint32 create_flags;
783 * Join joinable threads to prevent running out of threads since the finalizer
784 * thread might be blocked/backlogged.
786 mono_threads_join_threads ();
788 mono_threads_lock ();
791 mono_threads_unlock ();
794 if (threads_starting_up == NULL) {
795 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
796 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
798 mono_g_hash_table_insert (threads_starting_up, thread, thread);
799 mono_threads_unlock ();
801 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
802 if (!internal->start_notify) {
803 mono_threads_lock ();
804 mono_g_hash_table_remove (threads_starting_up, thread);
805 mono_threads_unlock ();
806 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
812 stack_size = default_stacksize_for_thread (internal);
814 /* Create suspended, so we can do some housekeeping before the thread
817 create_flags = CREATE_SUSPENDED;
819 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
820 stack_size, create_flags, &tid);
822 if (thread_handle == NULL) {
823 /* The thread couldn't be created, so throw an exception */
824 mono_threads_lock ();
825 mono_g_hash_table_remove (threads_starting_up, thread);
826 mono_threads_unlock ();
828 if (throw_on_failure)
829 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
831 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
834 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
836 internal->handle = thread_handle;
837 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
839 internal->threadpool_thread = threadpool_thread;
840 if (threadpool_thread)
841 mono_thread_set_state (internal, ThreadState_Background);
843 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
845 /* Only store the handle when the thread is about to be
846 * launched, to avoid the main thread deadlocking while trying
847 * to clean up a thread that will never be signalled.
849 if (!handle_store (thread, FALSE))
852 mono_thread_info_resume (tid);
854 if (internal->start_notify) {
856 * Wait for the thread to set up its TLS data etc, so
857 * theres no potential race condition if someone tries
858 * to look up the data believing the thread has
861 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
863 MONO_PREPARE_BLOCKING;
864 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
865 MONO_FINISH_BLOCKING;
867 CloseHandle (internal->start_notify);
868 internal->start_notify = NULL;
871 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
876 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
878 if (mono_thread_start_cb) {
879 mono_thread_start_cb (tid, stack_start, func);
883 void mono_threads_set_default_stacksize (guint32 stacksize)
885 default_stacksize = stacksize;
888 guint32 mono_threads_get_default_stacksize (void)
890 return default_stacksize;
894 * mono_thread_create_internal:
896 * ARG should not be a GC reference.
899 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
902 MonoInternalThread *internal;
903 StartInfo *start_info;
906 thread = create_thread_object (domain);
907 internal = create_internal_thread ();
908 MONO_OBJECT_SETREF (thread, internal_thread, internal);
910 start_info = g_new0 (StartInfo, 1);
911 start_info->func = (guint32 (*)(void *))func;
912 start_info->obj = thread;
913 start_info->start_arg = arg;
915 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
919 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
920 #ifndef MONO_CROSS_COMPILE
921 if (mono_check_corlib_version () == NULL)
922 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
929 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
931 mono_thread_create_internal (domain, func, arg, FALSE, 0);
935 mono_thread_attach (MonoDomain *domain)
937 return mono_thread_attach_full (domain, FALSE);
941 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
943 MonoThreadInfo *info;
944 MonoInternalThread *thread;
945 MonoThread *current_thread;
946 HANDLE thread_handle;
947 MonoNativeThreadId tid;
949 if ((thread = mono_thread_internal_current ())) {
950 if (domain != mono_domain_get ())
951 mono_domain_set (domain, TRUE);
952 /* Already attached */
953 return mono_thread_current ();
956 if (!mono_gc_register_thread (&domain)) {
957 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.", mono_native_thread_id_get ());
960 thread = create_internal_thread ();
962 thread_handle = mono_thread_info_open_handle ();
963 g_assert (thread_handle);
965 tid=mono_native_thread_id_get ();
967 thread->handle = thread_handle;
968 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
969 thread->stack_ptr = &tid;
971 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
973 info = mono_thread_info_current ();
975 thread->thread_info = info;
976 thread->small_id = info->small_id;
978 current_thread = new_thread_with_internal (domain, thread);
980 if (!handle_store (current_thread, force_attach)) {
981 /* Mono is shutting down, so just wait for the end */
983 mono_thread_info_sleep (10000, NULL);
986 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
988 SET_CURRENT_OBJECT (thread);
989 mono_domain_set (domain, TRUE);
991 thread_adjust_static_data (thread);
993 init_root_domain_thread (thread, current_thread);
994 if (domain != mono_get_root_domain ())
995 set_current_thread_for_domain (domain, thread, current_thread);
998 if (mono_thread_attach_cb) {
1002 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1005 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1007 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1010 // FIXME: Need a separate callback
1011 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1013 return current_thread;
1017 mono_thread_detach_internal (MonoInternalThread *thread)
1019 g_return_if_fail (thread != NULL);
1021 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1023 thread_cleanup (thread);
1025 SET_CURRENT_OBJECT (NULL);
1026 mono_domain_unset ();
1028 /* Don't need to CloseHandle this thread, even though we took a
1029 * reference in mono_thread_attach (), because the GC will do it
1030 * when the Thread object is finalised.
1035 mono_thread_detach (MonoThread *thread)
1038 mono_thread_detach_internal (thread->internal_thread);
1042 * mono_thread_detach_if_exiting:
1044 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1045 * This should be used at the end of embedding code which calls into managed code, and which
1046 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1049 mono_thread_detach_if_exiting (void)
1051 if (mono_thread_info_is_exiting ()) {
1052 MonoInternalThread *thread;
1054 thread = mono_thread_internal_current ();
1056 mono_thread_detach_internal (thread);
1057 mono_thread_info_detach ();
1065 MonoInternalThread *thread = mono_thread_internal_current ();
1067 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1069 thread_cleanup (thread);
1070 SET_CURRENT_OBJECT (NULL);
1071 mono_domain_unset ();
1073 /* we could add a callback here for embedders to use. */
1074 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1075 exit (mono_environment_exitcode_get ());
1076 mono_thread_info_exit ();
1080 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1082 MonoInternalThread *internal = create_internal_thread ();
1084 internal->state = ThreadState_Unstarted;
1086 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1090 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1093 StartInfo *start_info;
1094 MonoInternalThread *internal;
1097 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1099 if (!this_obj->internal_thread)
1100 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1101 internal = this_obj->internal_thread;
1103 LOCK_THREAD (internal);
1105 if ((internal->state & ThreadState_Unstarted) == 0) {
1106 UNLOCK_THREAD (internal);
1107 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1111 if ((internal->state & ThreadState_Aborted) != 0) {
1112 UNLOCK_THREAD (internal);
1115 /* This is freed in start_wrapper */
1116 start_info = g_new0 (StartInfo, 1);
1117 start_info->func = NULL;
1118 start_info->start_arg = NULL;
1119 start_info->delegate = start;
1120 start_info->obj = this_obj;
1121 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1123 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1125 UNLOCK_THREAD (internal);
1129 internal->state &= ~ThreadState_Unstarted;
1131 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1133 UNLOCK_THREAD (internal);
1134 return internal->handle;
1138 * This is called from the finalizer of the internal thread object.
1141 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1143 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1146 * Since threads keep a reference to their thread object while running, by the time this function is called,
1147 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1148 * when thread_cleanup () can be called after this.
1151 CloseHandle (thread);
1153 if (this_obj->synch_cs) {
1154 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1155 this_obj->synch_cs = NULL;
1156 mono_coop_mutex_destroy (synch_cs);
1160 if (this_obj->name) {
1161 void *name = this_obj->name;
1162 this_obj->name = NULL;
1168 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1171 MonoInternalThread *thread = mono_thread_internal_current ();
1173 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1175 mono_thread_current_check_pending_interrupt ();
1178 gboolean alerted = FALSE;
1180 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1182 res = mono_thread_info_sleep (ms, &alerted);
1184 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1187 MonoException* exc = mono_thread_execute_interruption ();
1189 mono_raise_exception (exc);
1201 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1206 ves_icall_System_Threading_Thread_GetDomainID (void)
1208 return mono_domain_get()->domain_id;
1212 ves_icall_System_Threading_Thread_Yield (void)
1214 return mono_thread_info_yield ();
1218 * mono_thread_get_name:
1220 * Return the name of the thread. NAME_LEN is set to the length of the name.
1221 * Return NULL if the thread has no name. The returned memory is owned by the
1225 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1229 LOCK_THREAD (this_obj);
1231 if (!this_obj->name) {
1235 *name_len = this_obj->name_len;
1236 res = g_new (gunichar2, this_obj->name_len);
1237 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1240 UNLOCK_THREAD (this_obj);
1246 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1250 LOCK_THREAD (this_obj);
1252 if (!this_obj->name)
1255 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1257 UNLOCK_THREAD (this_obj);
1263 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1265 LOCK_THREAD (this_obj);
1267 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1268 UNLOCK_THREAD (this_obj);
1270 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1273 if (this_obj->name) {
1274 g_free (this_obj->name);
1275 this_obj->name_len = 0;
1278 this_obj->name = g_new (gunichar2, mono_string_length (name));
1279 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1280 this_obj->name_len = mono_string_length (name);
1283 this_obj->name = NULL;
1286 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1288 UNLOCK_THREAD (this_obj);
1290 if (this_obj->name && this_obj->tid) {
1291 char *tname = mono_string_to_utf8 (name);
1292 mono_profiler_thread_name (this_obj->tid, tname);
1293 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1299 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1301 mono_thread_set_name_internal (this_obj, name, TRUE);
1305 * ves_icall_System_Threading_Thread_GetPriority_internal:
1306 * @param this_obj: The MonoInternalThread on which to operate.
1308 * Gets the priority of the given thread.
1309 * @return: The priority of the given thread.
1312 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1315 MonoInternalThread *internal = this_obj->internal_thread;
1317 LOCK_THREAD (internal);
1318 priority = GetThreadPriority (internal->handle) + 2;
1319 UNLOCK_THREAD (internal);
1324 * ves_icall_System_Threading_Thread_SetPriority_internal:
1325 * @param this_obj: The MonoInternalThread on which to operate.
1326 * @param priority: The priority to set.
1328 * Sets the priority of the given thread.
1331 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1333 MonoInternalThread *internal = this_obj->internal_thread;
1335 LOCK_THREAD (internal);
1336 SetThreadPriority (internal->handle, priority - 2);
1337 UNLOCK_THREAD (internal);
1340 /* If the array is already in the requested domain, we just return it,
1341 otherwise we return a copy in that domain. */
1343 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1350 if (mono_object_domain (arr) == domain)
1353 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1354 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1359 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1361 return byte_array_to_domain (arr, mono_get_root_domain ());
1365 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1367 return byte_array_to_domain (arr, mono_domain_get ());
1371 mono_thread_current (void)
1373 MonoDomain *domain = mono_domain_get ();
1374 MonoInternalThread *internal = mono_thread_internal_current ();
1375 MonoThread **current_thread_ptr;
1377 g_assert (internal);
1378 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1380 if (!*current_thread_ptr) {
1381 g_assert (domain != mono_get_root_domain ());
1382 *current_thread_ptr = new_thread_with_internal (domain, internal);
1384 return *current_thread_ptr;
1387 /* Return the thread object belonging to INTERNAL in the current domain */
1389 mono_thread_current_for_thread (MonoInternalThread *internal)
1391 MonoDomain *domain = mono_domain_get ();
1392 MonoThread **current_thread_ptr;
1394 g_assert (internal);
1395 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1397 if (!*current_thread_ptr) {
1398 g_assert (domain != mono_get_root_domain ());
1399 *current_thread_ptr = new_thread_with_internal (domain, internal);
1401 return *current_thread_ptr;
1405 mono_thread_internal_current (void)
1407 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1408 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1413 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1415 MonoInternalThread *thread = this_obj->internal_thread;
1416 HANDLE handle = thread->handle;
1417 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1420 mono_thread_current_check_pending_interrupt ();
1422 LOCK_THREAD (thread);
1424 if ((thread->state & ThreadState_Unstarted) != 0) {
1425 UNLOCK_THREAD (thread);
1427 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1431 UNLOCK_THREAD (thread);
1436 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1438 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1440 MONO_PREPARE_BLOCKING;
1441 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1442 MONO_FINISH_BLOCKING;
1444 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1446 if(ret==WAIT_OBJECT_0) {
1447 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1452 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1458 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1466 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1468 MONO_PREPARE_BLOCKING;
1470 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1472 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1473 MONO_FINISH_BLOCKING;
1475 if (ret != WAIT_IO_COMPLETION)
1478 exc = mono_thread_execute_interruption ();
1480 mono_raise_exception (exc);
1485 /* Re-calculate ms according to the time passed */
1486 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1487 if (diff_ms >= ms) {
1491 wait = ms - diff_ms;
1497 /* FIXME: exitContext isnt documented */
1498 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1504 MonoObject *waitHandle;
1505 MonoInternalThread *thread = mono_thread_internal_current ();
1507 /* Do this WaitSleepJoin check before creating objects */
1508 mono_thread_current_check_pending_interrupt ();
1510 /* We fail in managed if the array has more than 64 elements */
1511 numhandles = (guint32)mono_array_length(mono_handles);
1512 handles = g_new0(HANDLE, numhandles);
1514 for(i = 0; i < numhandles; i++) {
1515 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1516 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1523 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1525 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1527 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1531 if(ret==WAIT_FAILED) {
1532 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1534 } else if(ret==WAIT_TIMEOUT) {
1535 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1542 /* FIXME: exitContext isnt documented */
1543 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1545 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1546 uintptr_t numhandles;
1549 MonoObject *waitHandle;
1550 MonoInternalThread *thread = mono_thread_internal_current ();
1552 /* Do this WaitSleepJoin check before creating objects */
1553 mono_thread_current_check_pending_interrupt ();
1555 numhandles = mono_array_length(mono_handles);
1556 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1559 for(i = 0; i < numhandles; i++) {
1560 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1561 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1568 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1570 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1572 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1574 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1577 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1579 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1580 return ret - WAIT_OBJECT_0;
1582 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1583 return ret - WAIT_ABANDONED_0;
1590 /* FIXME: exitContext isnt documented */
1591 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1594 MonoInternalThread *thread = mono_thread_internal_current ();
1596 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1602 mono_thread_current_check_pending_interrupt ();
1604 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1606 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1608 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1610 if(ret==WAIT_FAILED) {
1611 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1613 } else if(ret==WAIT_TIMEOUT) {
1614 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1622 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1625 MonoInternalThread *thread = mono_thread_internal_current ();
1630 mono_thread_current_check_pending_interrupt ();
1632 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1634 MONO_PREPARE_BLOCKING;
1635 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1636 MONO_FINISH_BLOCKING;
1638 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1640 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1643 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1650 mutex = CreateMutex (NULL, owned, NULL);
1652 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1654 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1662 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1663 return(ReleaseMutex (handle));
1666 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1672 *error = ERROR_SUCCESS;
1674 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1676 *error = GetLastError ();
1683 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1690 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1692 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1693 mono_string_chars (name));
1695 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1703 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1707 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1712 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1716 *error = ERROR_SUCCESS;
1718 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1720 *error = GetLastError ();
1726 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1733 event = CreateEvent (NULL, manual, initial, NULL);
1735 event = CreateEvent (NULL, manual, initial,
1736 mono_string_chars (name));
1738 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1746 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1747 return (SetEvent(handle));
1750 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1751 return (ResetEvent(handle));
1755 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1756 CloseHandle (handle);
1759 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1765 *error = ERROR_SUCCESS;
1767 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1769 *error = GetLastError ();
1775 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1777 return InterlockedIncrement (location);
1780 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1782 #if SIZEOF_VOID_P == 4
1783 if (G_UNLIKELY ((size_t)location & 0x7)) {
1785 mono_interlocked_lock ();
1788 mono_interlocked_unlock ();
1792 return InterlockedIncrement64 (location);
1795 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1797 return InterlockedDecrement(location);
1800 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1802 #if SIZEOF_VOID_P == 4
1803 if (G_UNLIKELY ((size_t)location & 0x7)) {
1805 mono_interlocked_lock ();
1808 mono_interlocked_unlock ();
1812 return InterlockedDecrement64 (location);
1815 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1817 return InterlockedExchange(location, value);
1820 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1823 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1824 mono_gc_wbarrier_generic_nostore (location);
1828 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1830 return InterlockedExchangePointer(location, value);
1833 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1835 IntFloatUnion val, ret;
1838 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1844 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1846 #if SIZEOF_VOID_P == 4
1847 if (G_UNLIKELY ((size_t)location & 0x7)) {
1849 mono_interlocked_lock ();
1852 mono_interlocked_unlock ();
1856 return InterlockedExchange64 (location, value);
1860 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1862 LongDoubleUnion val, ret;
1865 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1870 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1872 return InterlockedCompareExchange(location, value, comparand);
1875 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1877 gint32 r = InterlockedCompareExchange(location, value, comparand);
1878 *success = r == comparand;
1882 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1885 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1886 mono_gc_wbarrier_generic_nostore (location);
1890 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1892 return InterlockedCompareExchangePointer(location, value, comparand);
1895 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1897 IntFloatUnion val, ret, cmp;
1900 cmp.fval = comparand;
1901 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1907 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1909 #if SIZEOF_VOID_P == 8
1910 LongDoubleUnion val, comp, ret;
1913 comp.fval = comparand;
1914 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1920 mono_interlocked_lock ();
1922 if (old == comparand)
1924 mono_interlocked_unlock ();
1931 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1933 #if SIZEOF_VOID_P == 4
1934 if (G_UNLIKELY ((size_t)location & 0x7)) {
1936 mono_interlocked_lock ();
1938 if (old == comparand)
1940 mono_interlocked_unlock ();
1944 return InterlockedCompareExchange64 (location, value, comparand);
1948 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1951 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
1952 mono_gc_wbarrier_generic_nostore (location);
1957 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1960 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
1961 mono_gc_wbarrier_generic_nostore (location);
1966 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1968 return InterlockedAdd (location, value);
1972 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1974 #if SIZEOF_VOID_P == 4
1975 if (G_UNLIKELY ((size_t)location & 0x7)) {
1977 mono_interlocked_lock ();
1980 mono_interlocked_unlock ();
1984 return InterlockedAdd64 (location, value);
1988 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1990 #if SIZEOF_VOID_P == 4
1991 if (G_UNLIKELY ((size_t)location & 0x7)) {
1993 mono_interlocked_lock ();
1995 mono_interlocked_unlock ();
1999 return InterlockedRead64 (location);
2003 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2005 mono_memory_barrier ();
2009 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2011 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2013 if (state & ThreadState_Background) {
2014 /* If the thread changes the background mode, the main thread has to
2015 * be notified, since it has to rebuild the list of threads to
2018 SetEvent (background_change_event);
2023 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2025 mono_thread_set_state (this_obj, (MonoThreadState)state);
2027 if (state & ThreadState_Background) {
2028 /* If the thread changes the background mode, the main thread has to
2029 * be notified, since it has to rebuild the list of threads to
2032 SetEvent (background_change_event);
2037 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2041 LOCK_THREAD (this_obj);
2043 state = this_obj->state;
2045 UNLOCK_THREAD (this_obj);
2050 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2052 MonoInternalThread *current;
2054 MonoInternalThread *thread = this_obj->internal_thread;
2056 LOCK_THREAD (thread);
2058 current = mono_thread_internal_current ();
2060 thread->thread_interrupt_requested = TRUE;
2061 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2063 UNLOCK_THREAD (thread);
2066 abort_thread_internal (thread, TRUE, FALSE);
2070 void mono_thread_current_check_pending_interrupt ()
2072 MonoInternalThread *thread = mono_thread_internal_current ();
2073 gboolean throw_ = FALSE;
2075 LOCK_THREAD (thread);
2077 if (thread->thread_interrupt_requested) {
2079 thread->thread_interrupt_requested = FALSE;
2082 UNLOCK_THREAD (thread);
2085 mono_raise_exception (mono_get_exception_thread_interrupted ());
2090 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2092 LOCK_THREAD (thread);
2094 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2095 (thread->state & ThreadState_StopRequested) != 0 ||
2096 (thread->state & ThreadState_Stopped) != 0)
2098 UNLOCK_THREAD (thread);
2102 if ((thread->state & ThreadState_Unstarted) != 0) {
2103 thread->state |= ThreadState_Aborted;
2104 UNLOCK_THREAD (thread);
2108 thread->state |= ThreadState_AbortRequested;
2109 if (thread->abort_state_handle)
2110 mono_gchandle_free (thread->abort_state_handle);
2112 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2113 g_assert (thread->abort_state_handle);
2115 thread->abort_state_handle = 0;
2117 thread->abort_exc = NULL;
2119 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), thread, (gsize)thread->tid));
2121 /* During shutdown, we can't wait for other threads */
2123 /* Make sure the thread is awake */
2124 mono_thread_resume (thread);
2126 UNLOCK_THREAD (thread);
2128 abort_thread_internal (thread, TRUE, TRUE);
2132 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2134 MonoInternalThread *thread = mono_thread_internal_current ();
2135 gboolean was_aborting;
2137 LOCK_THREAD (thread);
2138 was_aborting = thread->state & ThreadState_AbortRequested;
2139 thread->state &= ~ThreadState_AbortRequested;
2140 UNLOCK_THREAD (thread);
2142 if (!was_aborting) {
2143 const char *msg = "Unable to reset abort because no abort was requested";
2144 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2147 thread->abort_exc = NULL;
2148 if (thread->abort_state_handle) {
2149 mono_gchandle_free (thread->abort_state_handle);
2150 /* This is actually not necessary - the handle
2151 only counts if the exception is set */
2152 thread->abort_state_handle = 0;
2157 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2159 LOCK_THREAD (thread);
2161 thread->state &= ~ThreadState_AbortRequested;
2163 if (thread->abort_exc) {
2164 thread->abort_exc = NULL;
2165 if (thread->abort_state_handle) {
2166 mono_gchandle_free (thread->abort_state_handle);
2167 /* This is actually not necessary - the handle
2168 only counts if the exception is set */
2169 thread->abort_state_handle = 0;
2173 UNLOCK_THREAD (thread);
2177 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2179 MonoInternalThread *thread = this_obj->internal_thread;
2180 MonoObject *state, *deserialized = NULL, *exc;
2183 if (!thread->abort_state_handle)
2186 state = mono_gchandle_get_target (thread->abort_state_handle);
2189 domain = mono_domain_get ();
2190 if (mono_object_domain (state) == domain)
2193 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2195 if (!deserialized) {
2196 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2198 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2199 mono_set_pending_exception (invalid_op_exc);
2203 return deserialized;
2207 mono_thread_suspend (MonoInternalThread *thread)
2209 LOCK_THREAD (thread);
2211 if ((thread->state & ThreadState_Unstarted) != 0 ||
2212 (thread->state & ThreadState_Aborted) != 0 ||
2213 (thread->state & ThreadState_Stopped) != 0)
2215 UNLOCK_THREAD (thread);
2219 if ((thread->state & ThreadState_Suspended) != 0 ||
2220 (thread->state & ThreadState_SuspendRequested) != 0 ||
2221 (thread->state & ThreadState_StopRequested) != 0)
2223 UNLOCK_THREAD (thread);
2227 thread->state |= ThreadState_SuspendRequested;
2229 UNLOCK_THREAD (thread);
2231 suspend_thread_internal (thread, FALSE);
2236 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2238 if (!mono_thread_suspend (this_obj->internal_thread)) {
2239 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2244 /* LOCKING: LOCK_THREAD(thread) must be held */
2246 mono_thread_resume (MonoInternalThread *thread)
2248 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2249 thread->state &= ~ThreadState_SuspendRequested;
2253 if ((thread->state & ThreadState_Suspended) == 0 ||
2254 (thread->state & ThreadState_Unstarted) != 0 ||
2255 (thread->state & ThreadState_Aborted) != 0 ||
2256 (thread->state & ThreadState_Stopped) != 0)
2261 UNLOCK_THREAD (thread);
2263 /* Awake the thread */
2264 if (!mono_thread_info_resume (thread_get_tid (thread)))
2267 LOCK_THREAD (thread);
2269 thread->state &= ~ThreadState_Suspended;
2275 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2277 if (!thread->internal_thread) {
2278 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2280 LOCK_THREAD (thread->internal_thread);
2281 if (!mono_thread_resume (thread->internal_thread))
2282 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2283 UNLOCK_THREAD (thread->internal_thread);
2288 mono_threads_is_critical_method (MonoMethod *method)
2290 switch (method->wrapper_type) {
2291 case MONO_WRAPPER_RUNTIME_INVOKE:
2292 case MONO_WRAPPER_XDOMAIN_INVOKE:
2293 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2300 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2305 if (mono_threads_is_critical_method (m)) {
2306 *((gboolean*)data) = TRUE;
2313 is_running_protected_wrapper (void)
2315 gboolean found = FALSE;
2316 mono_stack_walk (find_wrapper, &found);
2320 void mono_thread_internal_stop (MonoInternalThread *thread)
2322 LOCK_THREAD (thread);
2324 if ((thread->state & ThreadState_StopRequested) != 0 ||
2325 (thread->state & ThreadState_Stopped) != 0)
2327 UNLOCK_THREAD (thread);
2331 /* Make sure the thread is awake */
2332 mono_thread_resume (thread);
2334 thread->state |= ThreadState_StopRequested;
2335 thread->state &= ~ThreadState_AbortRequested;
2337 UNLOCK_THREAD (thread);
2339 abort_thread_internal (thread, TRUE, TRUE);
2342 void mono_thread_stop (MonoThread *thread)
2344 mono_thread_internal_stop (thread->internal_thread);
2348 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2350 gint8 tmp = *(volatile gint8 *)ptr;
2351 mono_memory_barrier ();
2356 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2358 gint16 tmp = *(volatile gint16 *)ptr;
2359 mono_memory_barrier ();
2364 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2366 gint32 tmp = *(volatile gint32 *)ptr;
2367 mono_memory_barrier ();
2372 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2374 gint64 tmp = *(volatile gint64 *)ptr;
2375 mono_memory_barrier ();
2380 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2382 volatile void *tmp = *(volatile void **)ptr;
2383 mono_memory_barrier ();
2384 return (void *) tmp;
2388 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2390 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2391 mono_memory_barrier ();
2392 return (MonoObject *) tmp;
2396 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2398 double tmp = *(volatile double *)ptr;
2399 mono_memory_barrier ();
2404 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2406 float tmp = *(volatile float *)ptr;
2407 mono_memory_barrier ();
2412 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2414 return InterlockedRead8 ((volatile gint8 *)ptr);
2418 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2420 return InterlockedRead16 ((volatile gint16 *)ptr);
2424 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2426 return InterlockedRead ((volatile gint32 *)ptr);
2430 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2432 #if SIZEOF_VOID_P == 4
2433 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2435 mono_interlocked_lock ();
2436 val = *(gint64*)ptr;
2437 mono_interlocked_unlock ();
2441 return InterlockedRead64 ((volatile gint64 *)ptr);
2445 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2447 return InterlockedReadPointer ((volatile gpointer *)ptr);
2451 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2455 #if SIZEOF_VOID_P == 4
2456 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2458 mono_interlocked_lock ();
2459 val = *(double*)ptr;
2460 mono_interlocked_unlock ();
2465 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2471 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2475 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2481 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2483 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2487 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2489 mono_memory_barrier ();
2490 *(volatile gint8 *)ptr = value;
2494 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2496 mono_memory_barrier ();
2497 *(volatile gint16 *)ptr = value;
2501 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2503 mono_memory_barrier ();
2504 *(volatile gint32 *)ptr = value;
2508 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2510 mono_memory_barrier ();
2511 *(volatile gint64 *)ptr = value;
2515 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2517 mono_memory_barrier ();
2518 *(volatile void **)ptr = value;
2522 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2524 mono_memory_barrier ();
2525 mono_gc_wbarrier_generic_store (ptr, value);
2529 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2531 mono_memory_barrier ();
2532 *(volatile double *)ptr = value;
2536 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2538 mono_memory_barrier ();
2539 *(volatile float *)ptr = value;
2543 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2545 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2549 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2551 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2555 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2557 InterlockedWrite ((volatile gint32 *)ptr, value);
2561 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2563 #if SIZEOF_VOID_P == 4
2564 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2565 mono_interlocked_lock ();
2566 *(gint64*)ptr = value;
2567 mono_interlocked_unlock ();
2572 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2576 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2578 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2582 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2586 #if SIZEOF_VOID_P == 4
2587 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2588 mono_interlocked_lock ();
2589 *(double*)ptr = value;
2590 mono_interlocked_unlock ();
2597 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2601 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2607 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2611 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2613 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2617 free_context (void *user_data)
2619 ContextStaticData *data = user_data;
2621 mono_threads_lock ();
2624 * There is no guarantee that, by the point this reference queue callback
2625 * has been invoked, the GC handle associated with the object will fail to
2626 * resolve as one might expect. So if we don't free and remove the GC
2627 * handle here, free_context_static_data_helper () could end up resolving
2628 * a GC handle to an actually-dead context which would contain a pointer
2629 * to an already-freed static data segment, resulting in a crash when
2632 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2634 mono_threads_unlock ();
2636 mono_gchandle_free (data->gc_handle);
2637 mono_free_static_data (data->static_data);
2642 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2644 mono_threads_lock ();
2646 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2649 contexts = g_hash_table_new (NULL, NULL);
2652 context_queue = mono_gc_reference_queue_new (free_context);
2654 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2655 g_hash_table_insert (contexts, gch, gch);
2658 * We use this intermediate structure to contain a duplicate pointer to
2659 * the static data because we can't rely on being able to resolve the GC
2660 * handle in the reference queue callback.
2662 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2663 data->gc_handle = GPOINTER_TO_UINT (gch);
2666 context_adjust_static_data (ctx);
2667 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2669 mono_threads_unlock ();
2671 mono_profiler_context_loaded (ctx);
2675 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2678 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2679 * cleanup in exceptional circumstances, we don't actually do any
2680 * cleanup work here. We instead do this via a reference queue.
2683 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2685 mono_profiler_context_unloaded (ctx);
2689 mono_thread_init_tls (void)
2691 MONO_FAST_TLS_INIT (tls_current_object);
2692 mono_native_tls_alloc (¤t_object_key, NULL);
2695 void mono_thread_init (MonoThreadStartCB start_cb,
2696 MonoThreadAttachCB attach_cb)
2698 mono_coop_mutex_init_recursive (&threads_mutex);
2700 mono_os_mutex_init_recursive(&interlocked_mutex);
2701 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2703 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2704 g_assert(background_change_event != NULL);
2706 mono_init_static_data_info (&thread_static_info);
2707 mono_init_static_data_info (&context_static_info);
2709 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2711 mono_thread_start_cb = start_cb;
2712 mono_thread_attach_cb = attach_cb;
2714 /* Get a pseudo handle to the current process. This is just a
2715 * kludge so that wapi can build a process handle if needed.
2716 * As a pseudo handle is returned, we don't need to clean
2719 GetCurrentProcess ();
2722 void mono_thread_cleanup (void)
2724 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2725 MonoThreadInfo *info;
2727 /* The main thread must abandon any held mutexes (particularly
2728 * important for named mutexes as they are shared across
2729 * processes, see bug 74680.) This will happen when the
2730 * thread exits, but if it's not running in a subthread it
2731 * won't exit in time.
2733 info = mono_thread_info_current ();
2734 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2738 /* This stuff needs more testing, it seems one of these
2739 * critical sections can be locked when mono_thread_cleanup is
2742 mono_coop_mutex_destroy (&threads_mutex);
2743 mono_os_mutex_destroy (&interlocked_mutex);
2744 mono_os_mutex_destroy (&delayed_free_table_mutex);
2745 mono_os_mutex_destroy (&small_id_mutex);
2746 CloseHandle (background_change_event);
2749 mono_native_tls_free (current_object_key);
2753 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2755 mono_thread_cleanup_fn = func;
2759 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2761 thread->internal_thread->manage_callback = func;
2764 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2766 mono_thread_notify_pending_exc_fn = func;
2770 static void print_tids (gpointer key, gpointer value, gpointer user)
2772 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2773 * sizeof(uint) and a cast to uint would overflow
2775 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2776 * print this as a pointer.
2778 g_message ("Waiting for: %p", key);
2783 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2784 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2788 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2792 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2794 MONO_PREPARE_BLOCKING;
2795 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2796 MONO_FINISH_BLOCKING;
2798 if(ret==WAIT_FAILED) {
2799 /* See the comment in build_wait_tids() */
2800 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2804 for(i=0; i<wait->num; i++)
2805 CloseHandle (wait->handles[i]);
2807 if (ret == WAIT_TIMEOUT)
2810 for(i=0; i<wait->num; i++) {
2811 gsize tid = wait->threads[i]->tid;
2814 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2815 * it can still run io-layer etc. code. So wait for it to really exit.
2816 * FIXME: This won't join threads which are not in the joinable_hash yet.
2818 mono_thread_join ((gpointer)tid);
2820 mono_threads_lock ();
2821 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2822 /* This thread must have been killed, because
2823 * it hasn't cleaned itself up. (It's just
2824 * possible that the thread exited before the
2825 * parent thread had a chance to store the
2826 * handle, and now there is another pointer to
2827 * the already-exited thread stored. In this
2828 * case, we'll just get two
2829 * mono_profiler_thread_end() calls for the
2833 mono_threads_unlock ();
2834 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2835 thread_cleanup (wait->threads[i]);
2837 mono_threads_unlock ();
2842 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2844 guint32 i, ret, count;
2846 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2848 /* Add the thread state change event, so it wakes up if a thread changes
2849 * to background mode.
2852 if (count < MAXIMUM_WAIT_OBJECTS) {
2853 wait->handles [count] = background_change_event;
2857 MONO_PREPARE_BLOCKING;
2858 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2859 MONO_FINISH_BLOCKING;
2861 if(ret==WAIT_FAILED) {
2862 /* See the comment in build_wait_tids() */
2863 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2867 for(i=0; i<wait->num; i++)
2868 CloseHandle (wait->handles[i]);
2870 if (ret == WAIT_TIMEOUT)
2873 if (ret < wait->num) {
2874 gsize tid = wait->threads[ret]->tid;
2875 mono_threads_lock ();
2876 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2877 /* See comment in wait_for_tids about thread cleanup */
2878 mono_threads_unlock ();
2879 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2880 thread_cleanup (wait->threads [ret]);
2882 mono_threads_unlock ();
2886 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2888 struct wait_data *wait=(struct wait_data *)user;
2890 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2892 MonoInternalThread *thread=(MonoInternalThread *)value;
2894 /* Ignore background threads, we abort them later */
2895 /* Do not lock here since it is not needed and the caller holds threads_lock */
2896 if (thread->state & ThreadState_Background) {
2897 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2898 return; /* just leave, ignore */
2901 if (mono_gc_is_finalizer_internal_thread (thread)) {
2902 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2906 if (thread == mono_thread_internal_current ()) {
2907 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2911 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2912 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2916 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2917 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2921 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2922 if (handle == NULL) {
2923 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2927 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2928 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2929 wait->handles[wait->num]=handle;
2930 wait->threads[wait->num]=thread;
2933 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2935 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2940 /* Just ignore the rest, we can't do anything with
2947 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2949 struct wait_data *wait=(struct wait_data *)user;
2950 MonoNativeThreadId self = mono_native_thread_id_get ();
2951 MonoInternalThread *thread = (MonoInternalThread *)value;
2954 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2957 /* The finalizer thread is not a background thread */
2958 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
2959 && (thread->state & ThreadState_Background) != 0
2960 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
2962 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2966 /* printf ("A: %d\n", wait->num); */
2967 wait->handles[wait->num]=thread->handle;
2968 wait->threads[wait->num]=thread;
2971 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2972 mono_thread_internal_stop (thread);
2976 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
2977 && !mono_gc_is_finalizer_internal_thread (thread);
2981 * mono_threads_set_shutting_down:
2983 * Is called by a thread that wants to shut down Mono. If the runtime is already
2984 * shutting down, the calling thread is suspended/stopped, and this function never
2988 mono_threads_set_shutting_down (void)
2990 MonoInternalThread *current_thread = mono_thread_internal_current ();
2992 mono_threads_lock ();
2994 if (shutting_down) {
2995 mono_threads_unlock ();
2997 /* Make sure we're properly suspended/stopped */
2999 LOCK_THREAD (current_thread);
3001 if ((current_thread->state & ThreadState_SuspendRequested) ||
3002 (current_thread->state & ThreadState_AbortRequested) ||
3003 (current_thread->state & ThreadState_StopRequested)) {
3004 UNLOCK_THREAD (current_thread);
3005 mono_thread_execute_interruption ();
3007 current_thread->state |= ThreadState_Stopped;
3008 UNLOCK_THREAD (current_thread);
3011 /*since we're killing the thread, unset the current domain.*/
3012 mono_domain_unset ();
3014 /* Wake up other threads potentially waiting for us */
3015 mono_thread_info_exit ();
3017 shutting_down = TRUE;
3019 /* Not really a background state change, but this will
3020 * interrupt the main thread if it is waiting for all
3021 * the other threads.
3023 SetEvent (background_change_event);
3025 mono_threads_unlock ();
3029 void mono_thread_manage (void)
3031 struct wait_data wait_data;
3032 struct wait_data *wait = &wait_data;
3034 memset (wait, 0, sizeof (struct wait_data));
3035 /* join each thread that's still running */
3036 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3038 mono_threads_lock ();
3040 THREAD_DEBUG (g_message("%s: No threads", __func__));
3041 mono_threads_unlock ();
3044 mono_threads_unlock ();
3047 mono_threads_lock ();
3048 if (shutting_down) {
3049 /* somebody else is shutting down */
3050 mono_threads_unlock ();
3053 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3054 mono_g_hash_table_foreach (threads, print_tids, NULL));
3056 ResetEvent (background_change_event);
3058 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3059 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3060 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3061 mono_threads_unlock ();
3063 /* Something to wait for */
3064 wait_for_tids_or_state_change (wait, INFINITE);
3066 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3067 } while(wait->num>0);
3069 /* Mono is shutting down, so just wait for the end */
3070 if (!mono_runtime_try_shutdown ()) {
3071 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3072 mono_thread_suspend (mono_thread_internal_current ());
3073 mono_thread_execute_interruption ();
3077 * Remove everything but the finalizer thread and self.
3078 * Also abort all the background threads
3081 mono_threads_lock ();
3084 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3085 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3086 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3088 mono_threads_unlock ();
3090 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3092 /* Something to wait for */
3093 wait_for_tids (wait, INFINITE);
3095 } while (wait->num > 0);
3098 * give the subthreads a chance to really quit (this is mainly needed
3099 * to get correct user and system times from getrusage/wait/time(1)).
3100 * This could be removed if we avoid pthread_detach() and use pthread_join().
3102 mono_thread_info_yield ();
3106 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3108 MonoInternalThread *thread = (MonoInternalThread*)value;
3109 struct wait_data *wait = (struct wait_data*)user_data;
3113 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3115 * This needs no locking.
3117 if ((thread->state & ThreadState_Suspended) != 0 ||
3118 (thread->state & ThreadState_Stopped) != 0)
3121 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3122 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3126 wait->handles [wait->num] = handle;
3127 wait->threads [wait->num] = thread;
3133 * mono_thread_suspend_all_other_threads:
3135 * Suspend all managed threads except the finalizer thread and this thread. It is
3136 * not possible to resume them later.
3138 void mono_thread_suspend_all_other_threads (void)
3140 struct wait_data wait_data;
3141 struct wait_data *wait = &wait_data;
3143 MonoNativeThreadId self = mono_native_thread_id_get ();
3144 guint32 eventidx = 0;
3145 gboolean starting, finished;
3147 memset (wait, 0, sizeof (struct wait_data));
3149 * The other threads could be in an arbitrary state at this point, i.e.
3150 * they could be starting up, shutting down etc. This means that there could be
3151 * threads which are not even in the threads hash table yet.
3155 * First we set a barrier which will be checked by all threads before they
3156 * are added to the threads hash table, and they will exit if the flag is set.
3157 * This ensures that no threads could be added to the hash later.
3158 * We will use shutting_down as the barrier for now.
3160 g_assert (shutting_down);
3163 * We make multiple calls to WaitForMultipleObjects since:
3164 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3165 * - some threads could exit without becoming suspended
3170 * Make a copy of the hashtable since we can't do anything with
3171 * threads while threads_mutex is held.
3174 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3175 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3176 mono_threads_lock ();
3177 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3178 mono_threads_unlock ();
3181 /* Get the suspended events that we'll be waiting for */
3182 for (i = 0; i < wait->num; ++i) {
3183 MonoInternalThread *thread = wait->threads [i];
3185 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3186 || mono_gc_is_finalizer_internal_thread (thread)
3187 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3189 //CloseHandle (wait->handles [i]);
3190 wait->threads [i] = NULL; /* ignore this thread in next loop */
3194 LOCK_THREAD (thread);
3196 if ((thread->state & ThreadState_Suspended) != 0 ||
3197 (thread->state & ThreadState_StopRequested) != 0 ||
3198 (thread->state & ThreadState_Stopped) != 0) {
3199 UNLOCK_THREAD (thread);
3200 CloseHandle (wait->handles [i]);
3201 wait->threads [i] = NULL; /* ignore this thread in next loop */
3207 /* Convert abort requests into suspend requests */
3208 if ((thread->state & ThreadState_AbortRequested) != 0)
3209 thread->state &= ~ThreadState_AbortRequested;
3211 thread->state |= ThreadState_SuspendRequested;
3213 UNLOCK_THREAD (thread);
3215 /* Signal the thread to suspend */
3216 suspend_thread_internal (thread, TRUE);
3218 if (eventidx <= 0) {
3220 * If there are threads which are starting up, we wait until they
3221 * are suspended when they try to register in the threads hash.
3222 * This is guaranteed to finish, since the threads which can create new
3223 * threads get suspended after a while.
3224 * FIXME: The finalizer thread can still create new threads.
3226 mono_threads_lock ();
3227 if (threads_starting_up)
3228 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3231 mono_threads_unlock ();
3233 mono_thread_info_sleep (100, NULL);
3241 MonoInternalThread *thread;
3242 MonoStackFrameInfo *frames;
3243 int nframes, max_frames;
3244 int nthreads, max_threads;
3245 MonoInternalThread **threads;
3246 } ThreadDumpUserData;
3248 static gboolean thread_dump_requested;
3250 /* This needs to be async safe */
3252 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3254 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3256 if (ud->nframes < ud->max_frames) {
3257 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3264 /* This needs to be async safe */
3265 static SuspendThreadResult
3266 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3268 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3269 MonoInternalThread *thread = user_data->thread;
3272 /* This no longer works with remote unwinding */
3274 wapi_desc = wapi_current_thread_desc ();
3275 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3280 if (thread == mono_thread_internal_current ())
3281 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3283 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3285 return MonoResumeThread;
3289 int nthreads, max_threads;
3290 MonoInternalThread **threads;
3291 } CollectThreadsUserData;
3294 collect_thread (gpointer key, gpointer value, gpointer user)
3296 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3297 MonoInternalThread *thread = (MonoInternalThread *)value;
3299 if (ud->nthreads < ud->max_threads)
3300 ud->threads [ud->nthreads ++] = thread;
3304 * Collect running threads into the THREADS array.
3305 * THREADS should be an array allocated on the stack.
3308 collect_threads (MonoInternalThread **thread_array, int max_threads)
3310 CollectThreadsUserData ud;
3312 memset (&ud, 0, sizeof (ud));
3313 /* This array contains refs, but its on the stack, so its ok */
3314 ud.threads = thread_array;
3315 ud.max_threads = max_threads;
3317 mono_threads_lock ();
3318 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3319 mono_threads_unlock ();
3325 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3327 GString* text = g_string_new (0);
3329 GError *error = NULL;
3332 ud->thread = thread;
3335 /* Collect frames for the thread */
3336 if (thread == mono_thread_internal_current ()) {
3337 get_thread_dump (mono_thread_info_current (), ud);
3339 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3343 * Do all the non async-safe work outside of get_thread_dump.
3346 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3348 g_string_append_printf (text, "\n\"%s\"", name);
3351 else if (thread->threadpool_thread) {
3352 g_string_append (text, "\n\"<threadpool thread>\"");
3354 g_string_append (text, "\n\"<unnamed thread>\"");
3357 for (i = 0; i < ud->nframes; ++i) {
3358 MonoStackFrameInfo *frame = &ud->frames [i];
3359 MonoMethod *method = NULL;
3361 if (frame->type == FRAME_TYPE_MANAGED)
3362 method = mono_jit_info_get_method (frame->ji);
3365 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3366 g_string_append_printf (text, " %s\n", location);
3369 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3373 fprintf (stdout, "%s", text->str);
3375 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3376 OutputDebugStringA(text->str);
3379 g_string_free (text, TRUE);
3384 mono_threads_perform_thread_dump (void)
3386 ThreadDumpUserData ud;
3387 MonoInternalThread *thread_array [128];
3388 int tindex, nthreads;
3390 if (!thread_dump_requested)
3393 printf ("Full thread dump:\n");
3395 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3396 nthreads = collect_threads (thread_array, 128);
3398 memset (&ud, 0, sizeof (ud));
3399 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3400 ud.max_frames = 256;
3402 for (tindex = 0; tindex < nthreads; ++tindex)
3403 dump_thread (thread_array [tindex], &ud);
3407 thread_dump_requested = FALSE;
3410 /* Obtain the thread dump of all threads */
3412 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3414 ThreadDumpUserData ud;
3415 MonoInternalThread *thread_array [128];
3416 MonoDomain *domain = mono_domain_get ();
3417 MonoDebugSourceLocation *location;
3418 int tindex, nthreads;
3420 *out_threads = NULL;
3421 *out_stack_frames = NULL;
3423 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3424 nthreads = collect_threads (thread_array, 128);
3426 memset (&ud, 0, sizeof (ud));
3427 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3428 ud.max_frames = 256;
3430 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3431 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3433 for (tindex = 0; tindex < nthreads; ++tindex) {
3434 MonoInternalThread *thread = thread_array [tindex];
3435 MonoArray *thread_frames;
3441 /* Collect frames for the thread */
3442 if (thread == mono_thread_internal_current ()) {
3443 get_thread_dump (mono_thread_info_current (), &ud);
3445 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3448 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3450 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3451 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3453 for (i = 0; i < ud.nframes; ++i) {
3454 MonoStackFrameInfo *frame = &ud.frames [i];
3455 MonoMethod *method = NULL;
3456 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3458 sf->native_offset = frame->native_offset;
3460 if (frame->type == FRAME_TYPE_MANAGED)
3461 method = mono_jit_info_get_method (frame->ji);
3464 sf->method_address = (gsize) frame->ji->code_start;
3466 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3468 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3470 sf->il_offset = location->il_offset;
3472 if (location && location->source_file) {
3473 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3474 sf->line = location->row;
3475 sf->column = location->column;
3477 mono_debug_free_source_location (location);
3482 mono_array_setref (thread_frames, i, sf);
3490 * mono_threads_request_thread_dump:
3492 * Ask all threads except the current to print their stacktrace to stdout.
3495 mono_threads_request_thread_dump (void)
3497 /*The new thread dump code runs out of the finalizer thread. */
3498 thread_dump_requested = TRUE;
3499 mono_gc_finalize_notify ();
3504 gint allocated; /* +1 so that refs [allocated] == NULL */
3508 typedef struct ref_stack RefStack;
3511 ref_stack_new (gint initial_size)
3515 initial_size = MAX (initial_size, 16) + 1;
3516 rs = g_new0 (RefStack, 1);
3517 rs->refs = g_new0 (gpointer, initial_size);
3518 rs->allocated = initial_size;
3523 ref_stack_destroy (gpointer ptr)
3525 RefStack *rs = (RefStack *)ptr;
3534 ref_stack_push (RefStack *rs, gpointer ptr)
3536 g_assert (rs != NULL);
3538 if (rs->bottom >= rs->allocated) {
3539 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3540 rs->allocated <<= 1;
3541 rs->refs [rs->allocated] = NULL;
3543 rs->refs [rs->bottom++] = ptr;
3547 ref_stack_pop (RefStack *rs)
3549 if (rs == NULL || rs->bottom == 0)
3553 rs->refs [rs->bottom] = NULL;
3557 ref_stack_find (RefStack *rs, gpointer ptr)
3564 for (refs = rs->refs; refs && *refs; refs++) {
3572 * mono_thread_push_appdomain_ref:
3574 * Register that the current thread may have references to objects in domain
3575 * @domain on its stack. Each call to this function should be paired with a
3576 * call to pop_appdomain_ref.
3579 mono_thread_push_appdomain_ref (MonoDomain *domain)
3581 MonoInternalThread *thread = mono_thread_internal_current ();
3584 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3585 SPIN_LOCK (thread->lock_thread_id);
3586 if (thread->appdomain_refs == NULL)
3587 thread->appdomain_refs = ref_stack_new (16);
3588 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3589 SPIN_UNLOCK (thread->lock_thread_id);
3594 mono_thread_pop_appdomain_ref (void)
3596 MonoInternalThread *thread = mono_thread_internal_current ();
3599 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3600 SPIN_LOCK (thread->lock_thread_id);
3601 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3602 SPIN_UNLOCK (thread->lock_thread_id);
3607 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3610 SPIN_LOCK (thread->lock_thread_id);
3611 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3612 SPIN_UNLOCK (thread->lock_thread_id);
3617 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3619 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3622 typedef struct abort_appdomain_data {
3623 struct wait_data wait;
3625 } abort_appdomain_data;
3628 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3630 MonoInternalThread *thread = (MonoInternalThread*)value;
3631 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3632 MonoDomain *domain = data->domain;
3634 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3635 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3637 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3638 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3641 data->wait.handles [data->wait.num] = handle;
3642 data->wait.threads [data->wait.num] = thread;
3645 /* Just ignore the rest, we can't do anything with
3653 * mono_threads_abort_appdomain_threads:
3655 * Abort threads which has references to the given appdomain.
3658 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3660 #ifdef __native_client__
3664 abort_appdomain_data user_data;
3666 int orig_timeout = timeout;
3669 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3671 start_time = mono_msec_ticks ();
3673 mono_threads_lock ();
3675 user_data.domain = domain;
3676 user_data.wait.num = 0;
3677 /* This shouldn't take any locks */
3678 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3679 mono_threads_unlock ();
3681 if (user_data.wait.num > 0) {
3682 /* Abort the threads outside the threads lock */
3683 for (i = 0; i < user_data.wait.num; ++i)
3684 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3687 * We should wait for the threads either to abort, or to leave the
3688 * domain. We can't do the latter, so we wait with a timeout.
3690 wait_for_tids (&user_data.wait, 100);
3693 /* Update remaining time */
3694 timeout -= mono_msec_ticks () - start_time;
3695 start_time = mono_msec_ticks ();
3697 if (orig_timeout != -1 && timeout < 0)
3700 while (user_data.wait.num > 0);
3702 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3708 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3710 MonoInternalThread *thread = (MonoInternalThread*)value;
3711 MonoDomain *domain = (MonoDomain*)user_data;
3714 /* No locking needed here */
3715 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3717 if (thread->cached_culture_info) {
3718 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3719 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3720 if (obj && obj->vtable->domain == domain)
3721 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3727 * mono_threads_clear_cached_culture:
3729 * Clear the cached_current_culture from all threads if it is in the
3733 mono_threads_clear_cached_culture (MonoDomain *domain)
3735 mono_threads_lock ();
3736 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3737 mono_threads_unlock ();
3741 * mono_thread_get_undeniable_exception:
3743 * Return an exception which needs to be raised when leaving a catch clause.
3744 * This is used for undeniable exception propagation.
3747 mono_thread_get_undeniable_exception (void)
3749 MonoInternalThread *thread = mono_thread_internal_current ();
3751 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3753 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3754 * exception if the thread no longer references a dying appdomain.
3756 thread->abort_exc->trace_ips = NULL;
3757 thread->abort_exc->stack_trace = NULL;
3758 return thread->abort_exc;
3764 #if MONO_SMALL_CONFIG
3765 #define NUM_STATIC_DATA_IDX 4
3766 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3770 #define NUM_STATIC_DATA_IDX 8
3771 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3772 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3776 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3777 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3780 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3782 gpointer *static_data = (gpointer *)addr;
3784 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3785 void **ptr = (void **)static_data [i];
3790 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3791 void **p = ptr + idx;
3794 mark_func ((MonoObject**)p, gc_data);
3800 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3802 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3806 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3808 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3812 * mono_alloc_static_data
3814 * Allocate memory blocks for storing threads or context static data
3817 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3819 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3822 gpointer* static_data = *static_data_ptr;
3824 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3825 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3827 if (mono_gc_user_markers_supported ()) {
3828 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3829 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3831 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3832 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3835 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3836 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3837 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3838 *static_data_ptr = static_data;
3839 static_data [0] = static_data;
3842 for (i = 1; i <= idx; ++i) {
3843 if (static_data [i])
3846 if (mono_gc_user_markers_supported ())
3847 static_data [i] = g_malloc0 (static_data_size [i]);
3849 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3850 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3851 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3856 mono_free_static_data (gpointer* static_data)
3859 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3860 gpointer p = static_data [i];
3864 * At this point, the static data pointer array is still registered with the
3865 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3866 * data. Freeing the individual arrays without first nulling their slots
3867 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3868 * such an already freed array. See bug #13813.
3870 static_data [i] = NULL;
3871 mono_memory_write_barrier ();
3872 if (mono_gc_user_markers_supported ())
3875 mono_gc_free_fixed (p);
3877 mono_gc_free_fixed (static_data);
3881 * mono_init_static_data_info
3883 * Initializes static data counters
3885 static void mono_init_static_data_info (StaticDataInfo *static_data)
3887 static_data->idx = 0;
3888 static_data->offset = 0;
3889 static_data->freelist = NULL;
3893 * mono_alloc_static_data_slot
3895 * Generates an offset for static data. static_data contains the counters
3896 * used to generate it.
3899 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3901 if (!static_data->idx && !static_data->offset) {
3903 * we use the first chunk of the first allocation also as
3904 * an array for the rest of the data
3906 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3908 static_data->offset += align - 1;
3909 static_data->offset &= ~(align - 1);
3910 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3911 static_data->idx ++;
3912 g_assert (size <= static_data_size [static_data->idx]);
3913 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3914 static_data->offset = 0;
3916 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3917 static_data->offset += size;
3922 * ensure thread static fields already allocated are valid for thread
3923 * This function is called when a thread is created or on thread attach.
3926 thread_adjust_static_data (MonoInternalThread *thread)
3928 mono_threads_lock ();
3929 if (thread_static_info.offset || thread_static_info.idx > 0) {
3930 /* get the current allocated size */
3931 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
3932 mono_alloc_static_data (&thread->static_data, offset, TRUE);
3934 mono_threads_unlock ();
3938 * LOCKING: requires that threads_mutex is held
3941 context_adjust_static_data (MonoAppContext *ctx)
3943 if (context_static_info.offset || context_static_info.idx > 0) {
3944 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
3945 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3946 ctx->data->static_data = ctx->static_data;
3951 * LOCKING: requires that threads_mutex is held
3954 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3956 MonoInternalThread *thread = (MonoInternalThread *)value;
3957 guint32 offset = GPOINTER_TO_UINT (user);
3959 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3963 * LOCKING: requires that threads_mutex is held
3966 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
3968 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
3973 guint32 offset = GPOINTER_TO_UINT (user);
3974 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3975 ctx->data->static_data = ctx->static_data;
3978 static StaticDataFreeList*
3979 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3981 StaticDataFreeList* prev = NULL;
3982 StaticDataFreeList* tmp = static_data->freelist;
3984 if (tmp->size == size) {
3986 prev->next = tmp->next;
3988 static_data->freelist = tmp->next;
3997 #if SIZEOF_VOID_P == 4
4004 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4006 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4008 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4009 MonoBitSet *rb = sets [idx];
4010 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4011 offset /= sizeof (uintptr_t);
4012 /* offset is now the bitmap offset */
4013 for (int i = 0; i < numbits; ++i) {
4014 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4015 mono_bitset_set_fast (rb, offset + i);
4020 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4022 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4023 MonoBitSet *rb = sets [idx];
4024 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4025 offset /= sizeof (uintptr_t);
4026 /* offset is now the bitmap offset */
4027 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4028 mono_bitset_clear_fast (rb, offset + i);
4032 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4034 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4036 StaticDataInfo *info;
4039 if (static_type == SPECIAL_STATIC_THREAD) {
4040 info = &thread_static_info;
4041 sets = thread_reference_bitmaps;
4043 info = &context_static_info;
4044 sets = context_reference_bitmaps;
4047 mono_threads_lock ();
4049 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4053 offset = item->offset;
4056 offset = mono_alloc_static_data_slot (info, size, align);
4059 update_reference_bitmap (sets, offset, bitmap, numbits);
4061 if (static_type == SPECIAL_STATIC_THREAD) {
4062 /* This can be called during startup */
4063 if (threads != NULL)
4064 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4066 if (contexts != NULL)
4067 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4069 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4072 mono_threads_unlock ();
4078 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4080 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4082 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4083 return get_thread_static_data (thread, offset);
4085 return get_context_static_data (thread->current_appcontext, offset);
4090 mono_get_special_static_data (guint32 offset)
4092 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4101 * LOCKING: requires that threads_mutex is held
4104 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4106 MonoInternalThread *thread = (MonoInternalThread *)value;
4107 OffsetSize *data = (OffsetSize *)user;
4108 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4109 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4112 if (!thread->static_data || !thread->static_data [idx])
4114 ptr = ((char*) thread->static_data [idx]) + off;
4115 mono_gc_bzero_atomic (ptr, data->size);
4119 * LOCKING: requires that threads_mutex is held
4122 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4124 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4129 OffsetSize *data = (OffsetSize *)user;
4130 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4131 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4134 if (!ctx->static_data || !ctx->static_data [idx])
4137 ptr = ((char*) ctx->static_data [idx]) + off;
4138 mono_gc_bzero_atomic (ptr, data->size);
4142 do_free_special_slot (guint32 offset, guint32 size)
4144 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4146 StaticDataInfo *info;
4148 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4149 info = &thread_static_info;
4150 sets = thread_reference_bitmaps;
4152 info = &context_static_info;
4153 sets = context_reference_bitmaps;
4156 guint32 data_offset = offset;
4157 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4158 OffsetSize data = { data_offset, size };
4160 clear_reference_bitmap (sets, data.offset, data.size);
4162 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4163 if (threads != NULL)
4164 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4166 if (contexts != NULL)
4167 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4170 if (!mono_runtime_is_shutting_down ()) {
4171 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4173 item->offset = offset;
4176 item->next = info->freelist;
4177 info->freelist = item;
4182 do_free_special (gpointer key, gpointer value, gpointer data)
4184 MonoClassField *field = (MonoClassField *)key;
4185 guint32 offset = GPOINTER_TO_UINT (value);
4188 size = mono_type_size (field->type, &align);
4189 do_free_special_slot (offset, size);
4193 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4195 mono_threads_lock ();
4197 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4199 mono_threads_unlock ();
4203 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4205 /* Only ever called for ThreadLocal instances */
4206 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4208 mono_threads_lock ();
4209 do_free_special_slot (offset, size);
4210 mono_threads_unlock ();
4214 static void CALLBACK dummy_apc (ULONG_PTR param)
4220 * mono_thread_execute_interruption
4222 * Performs the operation that the requested thread state requires (abort,
4225 static MonoException*
4226 mono_thread_execute_interruption (void)
4228 MonoInternalThread *thread = mono_thread_internal_current ();
4230 LOCK_THREAD (thread);
4232 /* MonoThread::interruption_requested can only be changed with atomics */
4233 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4234 /* this will consume pending APC calls */
4236 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4238 InterlockedDecrement (&thread_interruption_requested);
4240 /* Clear the interrupted flag of the thread so it can wait again */
4241 mono_thread_info_clear_self_interrupt ();
4244 if ((thread->state & ThreadState_AbortRequested) != 0) {
4245 UNLOCK_THREAD (thread);
4246 if (thread->abort_exc == NULL) {
4248 * This might be racy, but it has to be called outside the lock
4249 * since it calls managed code.
4251 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4253 return thread->abort_exc;
4255 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4256 self_suspend_internal (thread);
4259 else if ((thread->state & ThreadState_StopRequested) != 0) {
4260 /* FIXME: do this through the JIT? */
4262 UNLOCK_THREAD (thread);
4264 mono_thread_exit ();
4266 } else if (thread->pending_exception) {
4269 exc = thread->pending_exception;
4270 thread->pending_exception = NULL;
4272 UNLOCK_THREAD (thread);
4274 } else if (thread->thread_interrupt_requested) {
4276 thread->thread_interrupt_requested = FALSE;
4277 UNLOCK_THREAD (thread);
4279 return(mono_get_exception_thread_interrupted ());
4282 UNLOCK_THREAD (thread);
4288 * mono_thread_request_interruption
4290 * A signal handler can call this method to request the interruption of a
4291 * thread. The result of the interruption will depend on the current state of
4292 * the thread. If the result is an exception that needs to be throw, it is
4293 * provided as return value.
4296 mono_thread_request_interruption (gboolean running_managed)
4298 MonoInternalThread *thread = mono_thread_internal_current ();
4300 /* The thread may already be stopping */
4305 if (thread->interrupt_on_stop &&
4306 thread->state & ThreadState_StopRequested &&
4307 thread->state & ThreadState_Background)
4311 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4313 InterlockedIncrement (&thread_interruption_requested);
4315 if (!running_managed || is_running_protected_wrapper ()) {
4316 /* Can't stop while in unmanaged code. Increase the global interruption
4317 request count. When exiting the unmanaged method the count will be
4318 checked and the thread will be interrupted. */
4320 if (mono_thread_notify_pending_exc_fn && !running_managed)
4321 /* The JIT will notify the thread about the interruption */
4322 /* This shouldn't take any locks */
4323 mono_thread_notify_pending_exc_fn (NULL);
4325 /* this will awake the thread if it is in WaitForSingleObject
4327 /* Our implementation of this function ignores the func argument */
4329 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4331 mono_thread_info_self_interrupt ();
4336 return mono_thread_execute_interruption ();
4340 /*This function should be called by a thread after it has exited all of
4341 * its handle blocks at interruption time.*/
4343 mono_thread_resume_interruption (void)
4345 MonoInternalThread *thread = mono_thread_internal_current ();
4346 gboolean still_aborting;
4348 /* The thread may already be stopping */
4352 LOCK_THREAD (thread);
4353 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4354 UNLOCK_THREAD (thread);
4356 /*This can happen if the protected block called Thread::ResetAbort*/
4357 if (!still_aborting)
4360 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4362 InterlockedIncrement (&thread_interruption_requested);
4364 mono_thread_info_self_interrupt ();
4366 return mono_thread_execute_interruption ();
4369 gboolean mono_thread_interruption_requested ()
4371 if (thread_interruption_requested) {
4372 MonoInternalThread *thread = mono_thread_internal_current ();
4373 /* The thread may already be stopping */
4375 return (thread->interruption_requested);
4380 static MonoException*
4381 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4383 MonoInternalThread *thread = mono_thread_internal_current ();
4385 /* The thread may already be stopping */
4389 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4390 MonoException* exc = mono_thread_execute_interruption ();
4398 * Performs the interruption of the current thread, if one has been requested,
4399 * and the thread is not running a protected wrapper.
4400 * Return the exception which needs to be thrown, if any.
4403 mono_thread_interruption_checkpoint (void)
4405 return mono_thread_interruption_checkpoint_request (FALSE);
4409 * Performs the interruption of the current thread, if one has been requested.
4410 * Return the exception which needs to be thrown, if any.
4413 mono_thread_force_interruption_checkpoint_noraise (void)
4415 return mono_thread_interruption_checkpoint_request (TRUE);
4419 * Performs the interruption of the current thread, if one has been requested.
4420 * Throw the exception which needs to be thrown, if any.
4423 mono_thread_force_interruption_checkpoint (void)
4427 ex = mono_thread_interruption_checkpoint_request (TRUE);
4429 mono_raise_exception (ex);
4433 * mono_thread_get_and_clear_pending_exception:
4435 * Return any pending exceptions for the current thread and clear it as a side effect.
4438 mono_thread_get_and_clear_pending_exception (void)
4440 MonoInternalThread *thread = mono_thread_internal_current ();
4442 /* The thread may already be stopping */
4446 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4447 return mono_thread_execute_interruption ();
4450 if (thread->pending_exception) {
4451 MonoException *exc = thread->pending_exception;
4453 thread->pending_exception = NULL;
4461 * mono_set_pending_exception:
4463 * Set the pending exception of the current thread to EXC.
4464 * The exception will be thrown when execution returns to managed code.
4467 mono_set_pending_exception (MonoException *exc)
4469 MonoInternalThread *thread = mono_thread_internal_current ();
4471 /* The thread may already be stopping */
4475 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4477 mono_thread_request_interruption (FALSE);
4481 * mono_thread_interruption_request_flag:
4483 * Returns the address of a flag that will be non-zero if an interruption has
4484 * been requested for a thread. The thread to interrupt may not be the current
4485 * thread, so an additional call to mono_thread_interruption_requested() or
4486 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4489 gint32* mono_thread_interruption_request_flag ()
4491 return &thread_interruption_requested;
4495 mono_thread_init_apartment_state (void)
4498 MonoInternalThread* thread = mono_thread_internal_current ();
4500 /* Positive return value indicates success, either
4501 * S_OK if this is first CoInitialize call, or
4502 * S_FALSE if CoInitialize already called, but with same
4503 * threading model. A negative value indicates failure,
4504 * probably due to trying to change the threading model.
4506 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4507 ? COINIT_APARTMENTTHREADED
4508 : COINIT_MULTITHREADED) < 0) {
4509 thread->apartment_state = ThreadApartmentState_Unknown;
4515 mono_thread_cleanup_apartment_state (void)
4518 MonoInternalThread* thread = mono_thread_internal_current ();
4520 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4527 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4529 LOCK_THREAD (thread);
4530 thread->state |= state;
4531 UNLOCK_THREAD (thread);
4535 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4537 LOCK_THREAD (thread);
4538 thread->state &= ~state;
4539 UNLOCK_THREAD (thread);
4543 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4545 gboolean ret = FALSE;
4547 LOCK_THREAD (thread);
4549 if ((thread->state & test) != 0) {
4553 UNLOCK_THREAD (thread);
4558 static gboolean has_tls_get = FALSE;
4561 mono_runtime_set_has_tls_get (gboolean val)
4567 mono_runtime_has_tls_get (void)
4573 self_interrupt_thread (void *_unused)
4575 MonoThreadInfo *info = mono_thread_info_current ();
4576 MonoException *exc = mono_thread_execute_interruption ();
4577 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4578 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. */
4579 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4583 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4587 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4591 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4593 MonoJitInfo **dest = (MonoJitInfo **)data;
4599 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4601 MonoJitInfo *ji = NULL;
4604 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4609 MonoInternalThread *thread;
4610 gboolean install_async_abort;
4611 MonoThreadInfoInterruptToken *interrupt_token;
4614 static SuspendThreadResult
4615 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4617 AbortThreadData *data = (AbortThreadData *)ud;
4618 MonoInternalThread *thread = data->thread;
4619 MonoJitInfo *ji = NULL;
4620 gboolean protected_wrapper;
4621 gboolean running_managed;
4623 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4624 return MonoResumeThread;
4626 /*someone is already interrupting it*/
4627 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4628 return MonoResumeThread;
4630 InterlockedIncrement (&thread_interruption_requested);
4632 ji = mono_thread_info_get_last_managed (info);
4633 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4634 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4636 if (!protected_wrapper && running_managed) {
4637 /*We are in managed code*/
4638 /*Set the thread to call */
4639 if (data->install_async_abort)
4640 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4641 return MonoResumeThread;
4643 if (mono_thread_notify_pending_exc_fn)
4644 /* The JIT will notify the thread about the interruption */
4645 mono_thread_notify_pending_exc_fn (info);
4648 * This will cause waits to be broken.
4649 * It will also prevent the thread from entering a wait, so if the thread returns
4650 * from the wait before it receives the abort signal, it will just spin in the wait
4651 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4654 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4656 return MonoResumeThread;
4661 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4663 AbortThreadData data = { 0 };
4664 data.thread = thread;
4665 data.install_async_abort = install_async_abort;
4668 FIXME this is insanely broken, it doesn't cause interruption to happen
4669 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4671 if (thread == mono_thread_internal_current ()) {
4672 /* Do it synchronously */
4673 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4675 mono_raise_exception (exc);
4677 mono_thread_info_self_interrupt ();
4682 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4683 if (data.interrupt_token)
4684 mono_thread_info_finish_interrupt (data.interrupt_token);
4685 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4689 MonoInternalThread *thread;
4691 MonoThreadInfoInterruptToken *interrupt_token;
4692 } SuspendThreadData;
4694 static SuspendThreadResult
4695 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4697 SuspendThreadData *data = (SuspendThreadData *)ud;
4698 MonoInternalThread *thread = data->thread;
4699 MonoJitInfo *ji = NULL;
4700 gboolean protected_wrapper;
4701 gboolean running_managed;
4703 ji = mono_thread_info_get_last_managed (info);
4704 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4705 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4707 if (running_managed && !protected_wrapper) {
4708 thread->state &= ~ThreadState_SuspendRequested;
4709 thread->state |= ThreadState_Suspended;
4710 return KeepSuspended;
4712 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4713 InterlockedIncrement (&thread_interruption_requested);
4714 if (data->interrupt)
4715 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4717 if (mono_thread_notify_pending_exc_fn && !running_managed)
4718 /* The JIT will notify the thread about the interruption */
4719 mono_thread_notify_pending_exc_fn (info);
4720 return MonoResumeThread;
4725 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4727 LOCK_THREAD (thread);
4728 if (thread == mono_thread_internal_current ()) {
4729 mono_thread_info_begin_self_suspend ();
4730 //XXX replace this with better named functions
4731 thread->state &= ~ThreadState_SuspendRequested;
4732 thread->state |= ThreadState_Suspended;
4733 UNLOCK_THREAD (thread);
4734 mono_thread_info_end_self_suspend ();
4736 SuspendThreadData data = { 0 };
4737 data.thread = thread;
4738 data.interrupt = interrupt;
4740 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4741 if (data.interrupt_token)
4742 mono_thread_info_finish_interrupt (data.interrupt_token);
4743 UNLOCK_THREAD (thread);
4747 /*This is called with @thread synch_cs held and it must release it*/
4749 self_suspend_internal (MonoInternalThread *thread)
4751 mono_thread_info_begin_self_suspend ();
4752 thread->state &= ~ThreadState_SuspendRequested;
4753 thread->state |= ThreadState_Suspended;
4754 UNLOCK_THREAD (thread);
4755 mono_thread_info_end_self_suspend ();
4760 * mono_thread_is_foreign:
4761 * @thread: the thread to query
4763 * This function allows one to determine if a thread was created by the mono runtime and has
4764 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4766 * Returns: true if @thread was not created by the runtime.
4769 mono_thread_is_foreign (MonoThread *thread)
4771 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4772 return info->runtime_thread == FALSE;
4776 * mono_add_joinable_thread:
4778 * Add TID to the list of joinable threads.
4779 * LOCKING: Acquires the threads lock.
4782 mono_threads_add_joinable_thread (gpointer tid)
4786 * We cannot detach from threads because it causes problems like
4787 * 2fd16f60/r114307. So we collect them and join them when
4788 * we have time (in he finalizer thread).
4790 joinable_threads_lock ();
4791 if (!joinable_threads)
4792 joinable_threads = g_hash_table_new (NULL, NULL);
4793 g_hash_table_insert (joinable_threads, tid, tid);
4794 joinable_thread_count ++;
4795 joinable_threads_unlock ();
4797 mono_gc_finalize_notify ();
4802 * mono_threads_join_threads:
4804 * Join all joinable threads. This is called from the finalizer thread.
4805 * LOCKING: Acquires the threads lock.
4808 mono_threads_join_threads (void)
4811 GHashTableIter iter;
4818 if (!joinable_thread_count)
4822 joinable_threads_lock ();
4824 if (g_hash_table_size (joinable_threads)) {
4825 g_hash_table_iter_init (&iter, joinable_threads);
4826 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4827 thread = (pthread_t)tid;
4828 g_hash_table_remove (joinable_threads, key);
4829 joinable_thread_count --;
4832 joinable_threads_unlock ();
4834 if (thread != pthread_self ())
4835 /* This shouldn't block */
4836 pthread_join (thread, NULL);
4847 * Wait for thread TID to exit.
4848 * LOCKING: Acquires the threads lock.
4851 mono_thread_join (gpointer tid)
4855 gboolean found = FALSE;
4857 joinable_threads_lock ();
4858 if (!joinable_threads)
4859 joinable_threads = g_hash_table_new (NULL, NULL);
4860 if (g_hash_table_lookup (joinable_threads, tid)) {
4861 g_hash_table_remove (joinable_threads, tid);
4862 joinable_thread_count --;
4865 joinable_threads_unlock ();
4868 thread = (pthread_t)tid;
4869 pthread_join (thread, NULL);
4874 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4876 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4877 mono_thread_interruption_checkpoint ();
4880 static inline gboolean
4881 is_appdomainunloaded_exception (MonoClass *klass)
4883 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4885 if (!app_domain_unloaded_exception_klass)
4886 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4887 g_assert (app_domain_unloaded_exception_klass);
4889 return klass == app_domain_unloaded_exception_klass;
4892 static inline gboolean
4893 is_threadabort_exception (MonoClass *klass)
4895 return klass == mono_defaults.threadabortexception_class;
4899 mono_thread_internal_unhandled_exception (MonoObject* exc)
4901 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4902 MonoClass *klass = exc->vtable->klass;
4903 if (is_threadabort_exception (klass)) {
4904 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4905 } else if (!is_appdomainunloaded_exception (klass)) {
4906 mono_unhandled_exception (exc);
4907 if (mono_environment_exitcode_get () == 1)
4914 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4916 mono_threads_get_thread_dump (out_threads, out_stack_traces);