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)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
45 #include <mono/metadata/gc-internals.h>
46 #include <mono/metadata/reflection-internals.h>
52 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
53 #define USE_TKILL_ON_ANDROID 1
56 #ifdef PLATFORM_ANDROID
59 #ifdef USE_TKILL_ON_ANDROID
60 extern int tkill (pid_t tid, int signal);
64 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_DEBUG(a)
66 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
67 #define THREAD_WAIT_DEBUG(a)
68 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
69 #define LIBGC_DEBUG(a)
71 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
72 #define SPIN_LOCK(i) do { \
73 if (SPIN_TRYLOCK (i)) \
77 #define SPIN_UNLOCK(i) i = 0
79 #define LOCK_THREAD(thread) lock_thread((thread))
80 #define UNLOCK_THREAD(thread) unlock_thread((thread))
82 /* Provide this for systems with glib < 2.6 */
83 #ifndef G_GSIZE_FORMAT
84 # if GLIB_SIZEOF_LONG == 8
85 # define G_GSIZE_FORMAT "lu"
87 # define G_GSIZE_FORMAT "u"
93 guint32 (*func)(void *);
109 typedef struct _StaticDataFreeList StaticDataFreeList;
110 struct _StaticDataFreeList {
111 StaticDataFreeList *next;
119 StaticDataFreeList *freelist;
122 /* Number of cached culture objects in the MonoThread->cached_culture_info array
123 * (per-type): we use the first NUM entries for CultureInfo and the last for
124 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
126 #define NUM_CACHED_CULTURES 4
127 #define CULTURES_START_IDX 0
128 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
130 /* Controls access to the 'threads' hash table */
131 static void mono_threads_lock (void);
132 static void mono_threads_unlock (void);
133 static MonoCoopMutex threads_mutex;
135 /* Controls access to the 'joinable_threads' hash table */
136 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
137 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
138 static mono_mutex_t joinable_threads_mutex;
140 /* Holds current status of static data heap */
141 static StaticDataInfo thread_static_info;
142 static StaticDataInfo context_static_info;
144 /* The hash of existing threads (key is thread ID, value is
145 * MonoInternalThread*) that need joining before exit
147 static MonoGHashTable *threads=NULL;
149 /* List of app context GC handles.
150 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
152 static GHashTable *contexts = NULL;
154 /* Cleanup queue for contexts. */
155 static MonoReferenceQueue *context_queue;
158 * Threads which are starting up and they are not in the 'threads' hash yet.
159 * When handle_store is called for a thread, it will be removed from this hash table.
160 * Protected by mono_threads_lock ().
162 static MonoGHashTable *threads_starting_up = NULL;
164 /* The TLS key that holds the MonoObject assigned to each thread */
165 static MonoNativeTlsKey current_object_key;
168 /* Protected by the threads lock */
169 static GHashTable *joinable_threads;
170 static int joinable_thread_count;
172 #ifdef MONO_HAVE_FAST_TLS
173 /* we need to use both the Tls* functions and __thread because
174 * the gc needs to see all the threads
176 MONO_FAST_TLS_DECLARE(tls_current_object);
177 #define SET_CURRENT_OBJECT(x) do { \
178 MONO_FAST_TLS_SET (tls_current_object, x); \
179 mono_native_tls_set_value (current_object_key, x); \
181 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
183 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
184 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
187 /* function called at thread start */
188 static MonoThreadStartCB mono_thread_start_cb = NULL;
190 /* function called at thread attach */
191 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
193 /* function called at thread cleanup */
194 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
196 /* The default stack size for each thread */
197 static guint32 default_stacksize = 0;
198 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
200 static void thread_adjust_static_data (MonoInternalThread *thread);
201 static void context_adjust_static_data (MonoAppContext *ctx);
202 static void mono_free_static_data (gpointer* static_data);
203 static void mono_init_static_data_info (StaticDataInfo *static_data);
204 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
205 static gboolean mono_thread_resume (MonoInternalThread* thread);
206 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
207 static void self_abort_internal (void);
208 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (void);
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;
229 /* Class lazy loading functions */
230 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
233 mono_threads_lock (void)
235 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
239 mono_threads_unlock (void)
241 mono_locks_coop_release (&threads_mutex, ThreadsLock);
246 get_next_managed_thread_id (void)
248 return InterlockedIncrement (&managed_thread_id_counter);
252 mono_thread_get_tls_key (void)
254 return current_object_key;
258 mono_thread_get_tls_offset (void)
261 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
265 static inline MonoNativeThreadId
266 thread_get_tid (MonoInternalThread *thread)
268 /* We store the tid as a guint64 to keep the object layout constant between platforms */
269 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
272 /* handle_store() and handle_remove() manage the array of threads that
273 * still need to be waited for when the main thread exits.
275 * If handle_store() returns FALSE the thread must not be started
276 * because Mono is shutting down.
278 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
280 mono_threads_lock ();
282 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
284 if (threads_starting_up)
285 mono_g_hash_table_remove (threads_starting_up, thread);
287 if (shutting_down && !force_attach) {
288 mono_threads_unlock ();
293 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
294 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
297 /* We don't need to duplicate thread->handle, because it is
298 * only closed when the thread object is finalized by the GC.
300 g_assert (thread->internal_thread);
301 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
302 thread->internal_thread);
304 mono_threads_unlock ();
309 static gboolean handle_remove(MonoInternalThread *thread)
312 gsize tid = thread->tid;
314 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
316 mono_threads_lock ();
319 /* We have to check whether the thread object for the
320 * tid is still the same in the table because the
321 * thread might have been destroyed and the tid reused
322 * in the meantime, in which case the tid would be in
323 * the table, but with another thread object.
325 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
326 mono_g_hash_table_remove (threads, (gpointer)tid);
335 mono_threads_unlock ();
337 /* Don't close the handle here, wait for the object finalizer
338 * to do it. Otherwise, the following race condition applies:
340 * 1) Thread exits (and handle_remove() closes the handle)
342 * 2) Some other handle is reassigned the same slot
344 * 3) Another thread tries to join the first thread, and
345 * blocks waiting for the reassigned handle to be signalled
346 * (which might never happen). This is possible, because the
347 * thread calling Join() still has a reference to the first
353 static void ensure_synch_cs_set (MonoInternalThread *thread)
355 MonoCoopMutex *synch_cs;
357 if (thread->synch_cs != NULL) {
361 synch_cs = g_new0 (MonoCoopMutex, 1);
362 mono_coop_mutex_init_recursive (synch_cs);
364 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
365 synch_cs, NULL) != NULL) {
366 /* Another thread must have installed this CS */
367 mono_coop_mutex_destroy (synch_cs);
373 lock_thread (MonoInternalThread *thread)
375 if (!thread->synch_cs)
376 ensure_synch_cs_set (thread);
378 g_assert (thread->synch_cs);
380 mono_coop_mutex_lock (thread->synch_cs);
384 unlock_thread (MonoInternalThread *thread)
386 mono_coop_mutex_unlock (thread->synch_cs);
390 * NOTE: this function can be called also for threads different from the current one:
391 * make sure no code called from it will ever assume it is run on the thread that is
392 * getting cleaned up.
394 static void thread_cleanup (MonoInternalThread *thread)
396 g_assert (thread != NULL);
398 if (thread->abort_state_handle) {
399 mono_gchandle_free (thread->abort_state_handle);
400 thread->abort_state_handle = 0;
402 thread->abort_exc = NULL;
403 thread->current_appcontext = NULL;
406 * This is necessary because otherwise we might have
407 * cross-domain references which will not get cleaned up when
408 * the target domain is unloaded.
410 if (thread->cached_culture_info) {
412 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
413 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
417 * thread->synch_cs can be NULL if this was called after
418 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
419 * This can happen only during shutdown.
420 * The shutting_down flag is not always set, so we can't assert on it.
422 if (thread->synch_cs)
423 LOCK_THREAD (thread);
425 thread->state |= ThreadState_Stopped;
426 thread->state &= ~ThreadState_Background;
428 if (thread->synch_cs)
429 UNLOCK_THREAD (thread);
432 An interruption request has leaked to cleanup. Adjust the global counter.
434 This can happen is the abort source thread finds the abortee (this) thread
435 in unmanaged code. If this thread never trips back to managed code or check
436 the local flag it will be left set and positively unbalance the global counter.
438 Leaving the counter unbalanced will cause a performance degradation since all threads
439 will now keep checking their local flags all the time.
441 if (InterlockedExchange (&thread->interruption_requested, 0))
442 InterlockedDecrement (&thread_interruption_requested);
444 /* if the thread is not in the hash it has been removed already */
445 if (!handle_remove (thread)) {
446 if (thread == mono_thread_internal_current ()) {
447 mono_domain_unset ();
448 mono_memory_barrier ();
450 /* This needs to be called even if handle_remove () fails */
451 if (mono_thread_cleanup_fn)
452 mono_thread_cleanup_fn (thread_get_tid (thread));
455 mono_release_type_locks (thread);
457 /* Can happen when we attach the profiler helper thread in order to heapshot. */
458 if (!mono_thread_info_lookup (thread->tid)->tools_thread)
459 mono_profiler_thread_end (thread->tid);
461 if (thread == mono_thread_internal_current ()) {
463 * This will signal async signal handlers that the thread has exited.
464 * The profiler callback needs this to be set, so it cannot be done earlier.
466 mono_domain_unset ();
467 mono_memory_barrier ();
470 if (thread == mono_thread_internal_current ())
471 mono_thread_pop_appdomain_ref ();
473 thread->cached_culture_info = NULL;
475 mono_free_static_data (thread->static_data);
476 thread->static_data = NULL;
477 ref_stack_destroy (thread->appdomain_refs);
478 thread->appdomain_refs = NULL;
480 if (mono_thread_cleanup_fn)
481 mono_thread_cleanup_fn (thread_get_tid (thread));
483 if (mono_gc_is_moving ()) {
484 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
485 thread->thread_pinning_ref = NULL;
491 * A special static data offset (guint32) consists of 3 parts:
493 * [0] 6-bit index into the array of chunks.
494 * [6] 25-bit offset into the array.
495 * [31] Bit indicating thread or context static.
500 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
511 } SpecialStaticOffset;
513 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
514 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
516 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
517 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
518 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
519 (((SpecialStaticOffset *) &(x))->fields.f)
522 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
524 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
526 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
527 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
529 return ((char *) thread->static_data [idx]) + off;
533 get_context_static_data (MonoAppContext *ctx, guint32 offset)
535 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
537 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
538 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
540 return ((char *) ctx->static_data [idx]) + off;
544 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
546 static MonoClassField *current_thread_field = NULL;
550 if (!current_thread_field) {
551 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
552 g_assert (current_thread_field);
555 mono_class_vtable (domain, mono_defaults.thread_class);
556 mono_domain_lock (domain);
557 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
558 mono_domain_unlock (domain);
561 return (MonoThread **)get_thread_static_data (thread, offset);
565 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
567 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
569 g_assert (current->obj.vtable->domain == domain);
571 g_assert (!*current_thread_ptr);
572 *current_thread_ptr = current;
576 create_thread_object (MonoDomain *domain, MonoError *error)
578 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
579 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
584 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
588 thread = create_thread_object (domain, error);
589 if (!mono_error_ok (error))
592 MONO_OBJECT_SETREF (thread, internal_thread, internal);
597 static MonoInternalThread*
598 create_internal_thread (MonoError *error)
600 MonoInternalThread *thread;
603 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
604 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
605 if (!mono_error_ok (error))
608 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
609 mono_coop_mutex_init_recursive (thread->synch_cs);
611 thread->apartment_state = ThreadApartmentState_Unknown;
612 thread->managed_id = get_next_managed_thread_id ();
613 if (mono_gc_is_moving ()) {
614 thread->thread_pinning_ref = thread;
615 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
622 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate, MonoError *error)
624 MonoDomain *domain = mono_get_root_domain ();
626 mono_error_init (error);
627 if (!candidate || candidate->obj.vtable->domain != domain) {
628 candidate = new_thread_with_internal (domain, thread, error);
629 return_val_if_nok (error, FALSE);
631 set_current_thread_for_domain (domain, thread, candidate);
632 g_assert (!thread->root_domain_thread);
633 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
637 static guint32 WINAPI start_wrapper_internal(void *data)
640 MonoThreadInfo *info;
641 StartInfo *start_info = (StartInfo *)data;
642 guint32 (*start_func)(void *);
646 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
649 MonoInternalThread *internal = start_info->obj->internal_thread;
650 MonoObject *start_delegate = start_info->delegate;
651 MonoDomain *domain = start_info->obj->obj.vtable->domain;
653 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
655 /* We can be sure start_info->obj->tid and
656 * start_info->obj->handle have been set, because the thread
657 * was created suspended, and these values were set before the
661 info = mono_thread_info_current ();
663 internal->thread_info = info;
664 internal->small_id = info->small_id;
668 SET_CURRENT_OBJECT (internal);
670 /* Every thread references the appdomain which created it */
671 mono_thread_push_appdomain_ref (domain);
673 if (!mono_domain_set (domain, FALSE)) {
674 /* No point in raising an appdomain_unloaded exception here */
675 /* FIXME: Cleanup here */
676 mono_thread_pop_appdomain_ref ();
680 start_func = start_info->func;
681 start_arg = start_info->obj->start_obj;
683 start_arg = start_info->start_arg;
685 /* We have to do this here because mono_thread_new_init()
686 requires that root_domain_thread is set up. */
687 thread_adjust_static_data (internal);
688 init_root_domain_thread (internal, start_info->obj, &error);
689 mono_error_raise_exception (&error); /* FIXME don't raise here */
691 /* This MUST be called before any managed code can be
692 * executed, as it calls the callback function that (for the
693 * jit) sets the lmf marker.
695 mono_thread_new_init (tid, &tid, start_func);
696 internal->stack_ptr = &tid;
697 if (domain != mono_get_root_domain ())
698 set_current_thread_for_domain (domain, internal, start_info->obj);
700 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
702 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
704 /* On 2.0 profile (and higher), set explicitly since state might have been
706 if (internal->apartment_state == ThreadApartmentState_Unknown)
707 internal->apartment_state = ThreadApartmentState_MTA;
709 mono_thread_init_apartment_state ();
711 if(internal->start_notify!=NULL) {
712 /* Let the thread that called Start() know we're
715 ReleaseSemaphore (internal->start_notify, 1, NULL);
719 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
723 * Call this after calling start_notify, since the profiler callback might want
724 * to lock the thread, and the lock is held by thread_start () which waits for
727 mono_profiler_thread_start (tid);
729 /* if the name was set before starting, we didn't invoke the profiler callback */
730 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
731 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
732 mono_profiler_thread_name (internal->tid, tname);
733 mono_thread_info_set_name (internal->tid, tname);
736 /* start_func is set only for unmanaged start functions */
738 start_func (start_arg);
741 g_assert (start_delegate != NULL);
742 args [0] = start_arg;
743 /* we may want to handle the exception here. See comment below on unhandled exceptions */
744 mono_runtime_delegate_invoke (start_delegate, args, NULL);
747 /* If the thread calls ExitThread at all, this remaining code
748 * will not be executed, but the main thread will eventually
749 * call thread_cleanup() on this thread's behalf.
752 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
754 /* Do any cleanup needed for apartment state. This
755 * cannot be done in thread_cleanup since thread_cleanup could be
756 * called for a thread other than the current thread.
757 * mono_thread_cleanup_apartment_state cleans up apartment
758 * for the current thead */
759 mono_thread_cleanup_apartment_state ();
761 thread_cleanup (internal);
765 /* Remove the reference to the thread object in the TLS data,
766 * so the thread object can be finalized. This won't be
767 * reached if the thread threw an uncaught exception, so those
768 * thread handles will stay referenced :-( (This is due to
769 * missing support for scanning thread-specific data in the
770 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
773 SET_CURRENT_OBJECT (NULL);
778 static guint32 WINAPI start_wrapper(void *data)
782 /* Avoid scanning the frames above this frame during a GC */
783 mono_gc_set_stack_end ((void*)&dummy);
785 return start_wrapper_internal (data);
791 * Common thread creation code.
792 * LOCKING: Acquires the threads lock.
795 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
798 HANDLE thread_handle;
799 MonoNativeThreadId tid;
800 guint32 create_flags;
803 * Join joinable threads to prevent running out of threads since the finalizer
804 * thread might be blocked/backlogged.
806 mono_threads_join_threads ();
808 mono_error_init (error);
810 mono_threads_lock ();
813 mono_threads_unlock ();
816 if (threads_starting_up == NULL) {
817 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
818 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
820 mono_g_hash_table_insert (threads_starting_up, thread, thread);
821 mono_threads_unlock ();
823 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
824 if (!internal->start_notify) {
825 mono_threads_lock ();
826 mono_g_hash_table_remove (threads_starting_up, thread);
827 mono_threads_unlock ();
828 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
834 stack_size = default_stacksize_for_thread (internal);
836 /* Create suspended, so we can do some housekeeping before the thread
839 create_flags = CREATE_SUSPENDED;
841 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
842 stack_size, create_flags, &tid);
844 if (thread_handle == NULL) {
845 /* The thread couldn't be created, so set an exception */
846 mono_threads_lock ();
847 mono_g_hash_table_remove (threads_starting_up, thread);
848 mono_threads_unlock ();
850 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
853 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
855 internal->handle = thread_handle;
856 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
858 internal->threadpool_thread = threadpool_thread;
859 if (threadpool_thread)
860 mono_thread_set_state (internal, ThreadState_Background);
862 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
864 /* Only store the handle when the thread is about to be
865 * launched, to avoid the main thread deadlocking while trying
866 * to clean up a thread that will never be signalled.
868 if (!handle_store (thread, FALSE))
871 mono_thread_info_resume (tid);
873 if (internal->start_notify) {
875 * Wait for the thread to set up its TLS data etc, so
876 * theres no potential race condition if someone tries
877 * to look up the data believing the thread has
880 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));
882 MONO_PREPARE_BLOCKING;
883 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
884 MONO_FINISH_BLOCKING;
886 CloseHandle (internal->start_notify);
887 internal->start_notify = NULL;
890 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));
895 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
897 if (mono_thread_start_cb) {
898 mono_thread_start_cb (tid, stack_start, func);
902 void mono_threads_set_default_stacksize (guint32 stacksize)
904 default_stacksize = stacksize;
907 guint32 mono_threads_get_default_stacksize (void)
909 return default_stacksize;
913 * mono_thread_create_internal:
915 * ARG should not be a GC reference.
918 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
922 MonoInternalThread *internal;
923 StartInfo *start_info;
926 thread = create_thread_object (domain, &error);
927 mono_error_raise_exception (&error); /* FIXME don't raise here */
929 internal = create_internal_thread (&error);
930 mono_error_raise_exception (&error); /* FIXME don't raise here */
932 MONO_OBJECT_SETREF (thread, internal_thread, internal);
934 start_info = g_new0 (StartInfo, 1);
935 start_info->func = (guint32 (*)(void *))func;
936 start_info->obj = thread;
937 start_info->start_arg = arg;
939 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, &error);
941 mono_error_raise_exception (&error); /* FIXME don't raise here */
945 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
946 #ifndef MONO_CROSS_COMPILE
947 if (mono_check_corlib_version () == NULL)
948 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
955 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
957 mono_thread_create_internal (domain, func, arg, FALSE, 0);
961 mono_thread_attach (MonoDomain *domain)
964 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
965 mono_error_raise_exception (&error);
971 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
973 MonoThreadInfo *info;
974 MonoInternalThread *thread;
975 MonoThread *current_thread;
976 HANDLE thread_handle;
977 MonoNativeThreadId tid;
979 mono_error_init (error);
981 if ((thread = mono_thread_internal_current ())) {
982 if (domain != mono_domain_get ())
983 mono_domain_set (domain, TRUE);
984 /* Already attached */
985 return mono_thread_current ();
988 if (!mono_gc_register_thread (&domain)) {
989 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 ());
992 thread = create_internal_thread (error);
993 if (!mono_error_ok (error))
996 thread_handle = mono_thread_info_open_handle ();
997 g_assert (thread_handle);
999 tid=mono_native_thread_id_get ();
1001 thread->handle = thread_handle;
1002 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
1003 thread->stack_ptr = &tid;
1005 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1007 info = mono_thread_info_current ();
1009 thread->thread_info = info;
1010 thread->small_id = info->small_id;
1012 current_thread = new_thread_with_internal (domain, thread, error);
1013 if (!mono_error_ok (error))
1016 if (!handle_store (current_thread, force_attach)) {
1017 /* Mono is shutting down, so just wait for the end */
1019 mono_thread_info_sleep (10000, NULL);
1022 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1024 SET_CURRENT_OBJECT (thread);
1025 mono_domain_set (domain, TRUE);
1027 thread_adjust_static_data (thread);
1029 init_root_domain_thread (thread, current_thread, error);
1030 return_val_if_nok (error, NULL);
1032 if (domain != mono_get_root_domain ())
1033 set_current_thread_for_domain (domain, thread, current_thread);
1036 if (mono_thread_attach_cb) {
1040 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1043 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1045 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1048 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1049 if (!info->tools_thread)
1050 // FIXME: Need a separate callback
1051 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1053 return current_thread;
1057 mono_thread_detach_internal (MonoInternalThread *thread)
1059 g_return_if_fail (thread != NULL);
1061 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1063 thread_cleanup (thread);
1065 SET_CURRENT_OBJECT (NULL);
1066 mono_domain_unset ();
1068 /* Don't need to CloseHandle this thread, even though we took a
1069 * reference in mono_thread_attach (), because the GC will do it
1070 * when the Thread object is finalised.
1075 mono_thread_detach (MonoThread *thread)
1078 mono_thread_detach_internal (thread->internal_thread);
1082 * mono_thread_detach_if_exiting:
1084 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1085 * This should be used at the end of embedding code which calls into managed code, and which
1086 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1089 mono_thread_detach_if_exiting (void)
1091 if (mono_thread_info_is_exiting ()) {
1092 MonoInternalThread *thread;
1094 thread = mono_thread_internal_current ();
1096 mono_thread_detach_internal (thread);
1097 mono_thread_info_detach ();
1105 MonoInternalThread *thread = mono_thread_internal_current ();
1107 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1109 thread_cleanup (thread);
1110 SET_CURRENT_OBJECT (NULL);
1111 mono_domain_unset ();
1113 /* we could add a callback here for embedders to use. */
1114 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1115 exit (mono_environment_exitcode_get ());
1116 mono_thread_info_exit ();
1120 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1123 MonoInternalThread *internal;
1125 internal = create_internal_thread (&error);
1126 mono_error_raise_exception (&error);
1128 internal->state = ThreadState_Unstarted;
1130 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1134 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1138 StartInfo *start_info;
1139 MonoInternalThread *internal;
1142 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1144 if (!this_obj->internal_thread)
1145 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1146 internal = this_obj->internal_thread;
1148 LOCK_THREAD (internal);
1150 if ((internal->state & ThreadState_Unstarted) == 0) {
1151 UNLOCK_THREAD (internal);
1152 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1156 if ((internal->state & ThreadState_Aborted) != 0) {
1157 UNLOCK_THREAD (internal);
1160 /* This is freed in start_wrapper */
1161 start_info = g_new0 (StartInfo, 1);
1162 start_info->func = NULL;
1163 start_info->start_arg = NULL;
1164 start_info->delegate = start;
1165 start_info->obj = this_obj;
1166 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1168 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1170 mono_error_cleanup (&error);
1171 UNLOCK_THREAD (internal);
1175 internal->state &= ~ThreadState_Unstarted;
1177 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1179 UNLOCK_THREAD (internal);
1180 return internal->handle;
1184 * This is called from the finalizer of the internal thread object.
1187 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1189 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1192 * Since threads keep a reference to their thread object while running, by the time this function is called,
1193 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1194 * when thread_cleanup () can be called after this.
1197 CloseHandle (thread);
1199 if (this_obj->synch_cs) {
1200 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1201 this_obj->synch_cs = NULL;
1202 mono_coop_mutex_destroy (synch_cs);
1206 if (this_obj->name) {
1207 void *name = this_obj->name;
1208 this_obj->name = NULL;
1214 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1217 MonoInternalThread *thread = mono_thread_internal_current ();
1219 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1221 mono_thread_current_check_pending_interrupt ();
1224 gboolean alerted = FALSE;
1226 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1228 res = mono_thread_info_sleep (ms, &alerted);
1230 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1233 MonoException* exc = mono_thread_execute_interruption ();
1235 mono_raise_exception (exc);
1247 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1252 ves_icall_System_Threading_Thread_GetDomainID (void)
1254 return mono_domain_get()->domain_id;
1258 ves_icall_System_Threading_Thread_Yield (void)
1260 return mono_thread_info_yield ();
1264 * mono_thread_get_name:
1266 * Return the name of the thread. NAME_LEN is set to the length of the name.
1267 * Return NULL if the thread has no name. The returned memory is owned by the
1271 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1275 LOCK_THREAD (this_obj);
1277 if (!this_obj->name) {
1281 *name_len = this_obj->name_len;
1282 res = g_new (gunichar2, this_obj->name_len);
1283 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1286 UNLOCK_THREAD (this_obj);
1292 * mono_thread_get_name_utf8:
1294 * Return the name of the thread in UTF-8.
1295 * Return NULL if the thread has no name.
1296 * The returned memory is owned by the caller.
1299 mono_thread_get_name_utf8 (MonoThread *thread)
1304 MonoInternalThread *internal = thread->internal_thread;
1305 if (internal == NULL)
1308 LOCK_THREAD (internal);
1310 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1312 UNLOCK_THREAD (internal);
1318 * mono_thread_get_managed_id:
1320 * Return the Thread.ManagedThreadId value of `thread`.
1321 * Returns -1 if `thread` is NULL.
1324 mono_thread_get_managed_id (MonoThread *thread)
1329 MonoInternalThread *internal = thread->internal_thread;
1330 if (internal == NULL)
1333 int32_t id = internal->managed_id;
1339 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1344 mono_error_init (&error);
1346 LOCK_THREAD (this_obj);
1348 if (!this_obj->name)
1351 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1353 UNLOCK_THREAD (this_obj);
1355 mono_error_raise_exception (&error);
1361 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed, MonoError *error)
1363 LOCK_THREAD (this_obj);
1365 mono_error_init (error);
1367 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1368 UNLOCK_THREAD (this_obj);
1370 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1373 if (this_obj->name) {
1374 g_free (this_obj->name);
1375 this_obj->name_len = 0;
1378 this_obj->name = g_new (gunichar2, mono_string_length (name));
1379 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1380 this_obj->name_len = mono_string_length (name);
1383 this_obj->name = NULL;
1386 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1388 UNLOCK_THREAD (this_obj);
1390 if (this_obj->name && this_obj->tid) {
1391 char *tname = mono_string_to_utf8 (name);
1392 mono_profiler_thread_name (this_obj->tid, tname);
1393 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1399 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1402 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1403 mono_error_set_pending_exception (&error);
1407 * ves_icall_System_Threading_Thread_GetPriority_internal:
1408 * @param this_obj: The MonoInternalThread on which to operate.
1410 * Gets the priority of the given thread.
1411 * @return: The priority of the given thread.
1414 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1417 MonoInternalThread *internal = this_obj->internal_thread;
1419 LOCK_THREAD (internal);
1420 priority = GetThreadPriority (internal->handle) + 2;
1421 UNLOCK_THREAD (internal);
1426 * ves_icall_System_Threading_Thread_SetPriority_internal:
1427 * @param this_obj: The MonoInternalThread on which to operate.
1428 * @param priority: The priority to set.
1430 * Sets the priority of the given thread.
1433 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1435 MonoInternalThread *internal = this_obj->internal_thread;
1437 LOCK_THREAD (internal);
1438 SetThreadPriority (internal->handle, priority - 2);
1439 UNLOCK_THREAD (internal);
1442 /* If the array is already in the requested domain, we just return it,
1443 otherwise we return a copy in that domain. */
1445 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1452 if (mono_object_domain (arr) == domain)
1455 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1456 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1461 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1463 return byte_array_to_domain (arr, mono_get_root_domain ());
1467 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1469 return byte_array_to_domain (arr, mono_domain_get ());
1473 mono_thread_current (void)
1476 MonoDomain *domain = mono_domain_get ();
1477 MonoInternalThread *internal = mono_thread_internal_current ();
1478 MonoThread **current_thread_ptr;
1480 g_assert (internal);
1481 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1483 if (!*current_thread_ptr) {
1484 g_assert (domain != mono_get_root_domain ());
1485 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1486 mono_error_raise_exception (&error); /* FIXME don't raise here */
1488 return *current_thread_ptr;
1491 /* Return the thread object belonging to INTERNAL in the current domain */
1493 mono_thread_current_for_thread (MonoInternalThread *internal)
1496 MonoDomain *domain = mono_domain_get ();
1497 MonoThread **current_thread_ptr;
1499 g_assert (internal);
1500 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1502 if (!*current_thread_ptr) {
1503 g_assert (domain != mono_get_root_domain ());
1504 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1505 mono_error_raise_exception (&error); /* FIXME don't raise here */
1507 return *current_thread_ptr;
1511 mono_thread_internal_current (void)
1513 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1514 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1519 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1521 MonoInternalThread *thread = this_obj->internal_thread;
1522 HANDLE handle = thread->handle;
1523 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1526 mono_thread_current_check_pending_interrupt ();
1528 LOCK_THREAD (thread);
1530 if ((thread->state & ThreadState_Unstarted) != 0) {
1531 UNLOCK_THREAD (thread);
1533 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1537 UNLOCK_THREAD (thread);
1542 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1544 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1546 MONO_PREPARE_BLOCKING;
1547 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1548 MONO_FINISH_BLOCKING;
1550 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1552 if(ret==WAIT_OBJECT_0) {
1553 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1558 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1564 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1572 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1574 MONO_PREPARE_BLOCKING;
1576 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1578 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1579 MONO_FINISH_BLOCKING;
1581 if (ret != WAIT_IO_COMPLETION)
1584 exc = mono_thread_execute_interruption ();
1586 mono_raise_exception (exc);
1591 /* Re-calculate ms according to the time passed */
1592 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1593 if (diff_ms >= ms) {
1597 wait = ms - diff_ms;
1603 /* FIXME: exitContext isnt documented */
1604 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1610 MonoObject *waitHandle;
1611 MonoInternalThread *thread = mono_thread_internal_current ();
1613 /* Do this WaitSleepJoin check before creating objects */
1614 mono_thread_current_check_pending_interrupt ();
1616 /* We fail in managed if the array has more than 64 elements */
1617 numhandles = (guint32)mono_array_length(mono_handles);
1618 handles = g_new0(HANDLE, numhandles);
1620 for(i = 0; i < numhandles; i++) {
1621 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1622 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1629 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1631 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1633 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1640 /* FIXME: exitContext isnt documented */
1641 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1643 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1644 uintptr_t numhandles;
1647 MonoObject *waitHandle;
1648 MonoInternalThread *thread = mono_thread_internal_current ();
1650 /* Do this WaitSleepJoin check before creating objects */
1651 mono_thread_current_check_pending_interrupt ();
1653 numhandles = mono_array_length(mono_handles);
1654 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1657 for(i = 0; i < numhandles; i++) {
1658 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1659 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1666 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1668 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1670 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1672 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1675 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1677 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1678 return ret - WAIT_OBJECT_0;
1680 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1681 return ret - WAIT_ABANDONED_0;
1688 /* FIXME: exitContext isnt documented */
1689 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms, gboolean exitContext)
1692 MonoInternalThread *thread = mono_thread_internal_current ();
1694 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1700 mono_thread_current_check_pending_interrupt ();
1702 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1704 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1706 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1712 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1715 MonoInternalThread *thread = mono_thread_internal_current ();
1720 mono_thread_current_check_pending_interrupt ();
1722 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1724 MONO_PREPARE_BLOCKING;
1725 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1726 MONO_FINISH_BLOCKING;
1728 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1733 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1740 mutex = CreateMutex (NULL, owned, NULL);
1742 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1744 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1752 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1753 return(ReleaseMutex (handle));
1756 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1762 *error = ERROR_SUCCESS;
1764 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1766 *error = GetLastError ();
1773 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1780 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1782 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1783 mono_string_chars (name));
1785 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1793 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1797 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1802 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1806 *error = ERROR_SUCCESS;
1808 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1810 *error = GetLastError ();
1816 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1823 event = CreateEvent (NULL, manual, initial, NULL);
1825 event = CreateEvent (NULL, manual, initial,
1826 mono_string_chars (name));
1828 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1836 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1837 return (SetEvent(handle));
1840 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1841 return (ResetEvent(handle));
1845 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1846 CloseHandle (handle);
1849 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1855 *error = ERROR_SUCCESS;
1857 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1859 *error = GetLastError ();
1865 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1867 return InterlockedIncrement (location);
1870 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1872 #if SIZEOF_VOID_P == 4
1873 if (G_UNLIKELY ((size_t)location & 0x7)) {
1875 mono_interlocked_lock ();
1878 mono_interlocked_unlock ();
1882 return InterlockedIncrement64 (location);
1885 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1887 return InterlockedDecrement(location);
1890 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1892 #if SIZEOF_VOID_P == 4
1893 if (G_UNLIKELY ((size_t)location & 0x7)) {
1895 mono_interlocked_lock ();
1898 mono_interlocked_unlock ();
1902 return InterlockedDecrement64 (location);
1905 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1907 return InterlockedExchange(location, value);
1910 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1913 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1914 mono_gc_wbarrier_generic_nostore (location);
1918 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1920 return InterlockedExchangePointer(location, value);
1923 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1925 IntFloatUnion val, ret;
1928 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1934 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1936 #if SIZEOF_VOID_P == 4
1937 if (G_UNLIKELY ((size_t)location & 0x7)) {
1939 mono_interlocked_lock ();
1942 mono_interlocked_unlock ();
1946 return InterlockedExchange64 (location, value);
1950 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1952 LongDoubleUnion val, ret;
1955 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1960 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1962 return InterlockedCompareExchange(location, value, comparand);
1965 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1967 gint32 r = InterlockedCompareExchange(location, value, comparand);
1968 *success = r == comparand;
1972 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1975 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1976 mono_gc_wbarrier_generic_nostore (location);
1980 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1982 return InterlockedCompareExchangePointer(location, value, comparand);
1985 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1987 IntFloatUnion val, ret, cmp;
1990 cmp.fval = comparand;
1991 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1997 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1999 #if SIZEOF_VOID_P == 8
2000 LongDoubleUnion val, comp, ret;
2003 comp.fval = comparand;
2004 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2010 mono_interlocked_lock ();
2012 if (old == comparand)
2014 mono_interlocked_unlock ();
2021 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2023 #if SIZEOF_VOID_P == 4
2024 if (G_UNLIKELY ((size_t)location & 0x7)) {
2026 mono_interlocked_lock ();
2028 if (old == comparand)
2030 mono_interlocked_unlock ();
2034 return InterlockedCompareExchange64 (location, value, comparand);
2038 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2041 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2042 mono_gc_wbarrier_generic_nostore (location);
2047 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2050 MONO_CHECK_NULL (location, NULL);
2051 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2052 mono_gc_wbarrier_generic_nostore (location);
2057 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2059 return InterlockedAdd (location, value);
2063 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2065 #if SIZEOF_VOID_P == 4
2066 if (G_UNLIKELY ((size_t)location & 0x7)) {
2068 mono_interlocked_lock ();
2071 mono_interlocked_unlock ();
2075 return InterlockedAdd64 (location, value);
2079 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2081 #if SIZEOF_VOID_P == 4
2082 if (G_UNLIKELY ((size_t)location & 0x7)) {
2084 mono_interlocked_lock ();
2086 mono_interlocked_unlock ();
2090 return InterlockedRead64 (location);
2094 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2096 mono_memory_barrier ();
2100 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2102 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2104 if (state & ThreadState_Background) {
2105 /* If the thread changes the background mode, the main thread has to
2106 * be notified, since it has to rebuild the list of threads to
2109 SetEvent (background_change_event);
2114 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2116 mono_thread_set_state (this_obj, (MonoThreadState)state);
2118 if (state & ThreadState_Background) {
2119 /* If the thread changes the background mode, the main thread has to
2120 * be notified, since it has to rebuild the list of threads to
2123 SetEvent (background_change_event);
2128 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2132 LOCK_THREAD (this_obj);
2134 state = this_obj->state;
2136 UNLOCK_THREAD (this_obj);
2141 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2143 MonoInternalThread *current;
2145 MonoInternalThread *thread = this_obj->internal_thread;
2147 LOCK_THREAD (thread);
2149 current = mono_thread_internal_current ();
2151 thread->thread_interrupt_requested = TRUE;
2152 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2154 UNLOCK_THREAD (thread);
2157 async_abort_internal (thread, FALSE);
2161 void mono_thread_current_check_pending_interrupt ()
2163 MonoInternalThread *thread = mono_thread_internal_current ();
2164 gboolean throw_ = FALSE;
2166 LOCK_THREAD (thread);
2168 if (thread->thread_interrupt_requested) {
2170 thread->thread_interrupt_requested = FALSE;
2173 UNLOCK_THREAD (thread);
2176 mono_raise_exception (mono_get_exception_thread_interrupted ());
2181 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2183 LOCK_THREAD (thread);
2185 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2186 (thread->state & ThreadState_StopRequested) != 0 ||
2187 (thread->state & ThreadState_Stopped) != 0)
2189 UNLOCK_THREAD (thread);
2193 if ((thread->state & ThreadState_Unstarted) != 0) {
2194 thread->state |= ThreadState_Aborted;
2195 UNLOCK_THREAD (thread);
2199 thread->state |= ThreadState_AbortRequested;
2200 if (thread->abort_state_handle)
2201 mono_gchandle_free (thread->abort_state_handle);
2203 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2204 g_assert (thread->abort_state_handle);
2206 thread->abort_state_handle = 0;
2208 thread->abort_exc = NULL;
2210 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));
2212 /* During shutdown, we can't wait for other threads */
2214 /* Make sure the thread is awake */
2215 mono_thread_resume (thread);
2217 UNLOCK_THREAD (thread);
2219 if (thread == mono_thread_internal_current ())
2220 self_abort_internal ();
2222 async_abort_internal (thread, TRUE);
2226 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2228 MonoInternalThread *thread = mono_thread_internal_current ();
2229 gboolean was_aborting;
2231 LOCK_THREAD (thread);
2232 was_aborting = thread->state & ThreadState_AbortRequested;
2233 thread->state &= ~ThreadState_AbortRequested;
2234 UNLOCK_THREAD (thread);
2236 if (!was_aborting) {
2237 const char *msg = "Unable to reset abort because no abort was requested";
2238 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2241 thread->abort_exc = NULL;
2242 if (thread->abort_state_handle) {
2243 mono_gchandle_free (thread->abort_state_handle);
2244 /* This is actually not necessary - the handle
2245 only counts if the exception is set */
2246 thread->abort_state_handle = 0;
2251 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2253 LOCK_THREAD (thread);
2255 thread->state &= ~ThreadState_AbortRequested;
2257 if (thread->abort_exc) {
2258 thread->abort_exc = NULL;
2259 if (thread->abort_state_handle) {
2260 mono_gchandle_free (thread->abort_state_handle);
2261 /* This is actually not necessary - the handle
2262 only counts if the exception is set */
2263 thread->abort_state_handle = 0;
2267 UNLOCK_THREAD (thread);
2271 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2273 MonoInternalThread *thread = this_obj->internal_thread;
2274 MonoObject *state, *deserialized = NULL, *exc;
2277 if (!thread->abort_state_handle)
2280 state = mono_gchandle_get_target (thread->abort_state_handle);
2283 domain = mono_domain_get ();
2284 if (mono_object_domain (state) == domain)
2287 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2289 if (!deserialized) {
2290 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2292 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2293 mono_set_pending_exception (invalid_op_exc);
2297 return deserialized;
2301 mono_thread_suspend (MonoInternalThread *thread)
2303 LOCK_THREAD (thread);
2305 if ((thread->state & ThreadState_Unstarted) != 0 ||
2306 (thread->state & ThreadState_Aborted) != 0 ||
2307 (thread->state & ThreadState_Stopped) != 0)
2309 UNLOCK_THREAD (thread);
2313 if ((thread->state & ThreadState_Suspended) != 0 ||
2314 (thread->state & ThreadState_SuspendRequested) != 0 ||
2315 (thread->state & ThreadState_StopRequested) != 0)
2317 UNLOCK_THREAD (thread);
2321 thread->state |= ThreadState_SuspendRequested;
2323 if (thread == mono_thread_internal_current ()) {
2324 /* calls UNLOCK_THREAD (thread) */
2325 self_suspend_internal ();
2327 /* calls UNLOCK_THREAD (thread) */
2328 async_suspend_internal (thread, FALSE);
2335 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2337 if (!mono_thread_suspend (this_obj->internal_thread)) {
2338 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2343 /* LOCKING: LOCK_THREAD(thread) must be held */
2345 mono_thread_resume (MonoInternalThread *thread)
2347 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2348 thread->state &= ~ThreadState_SuspendRequested;
2352 if ((thread->state & ThreadState_Suspended) == 0 ||
2353 (thread->state & ThreadState_Unstarted) != 0 ||
2354 (thread->state & ThreadState_Aborted) != 0 ||
2355 (thread->state & ThreadState_Stopped) != 0)
2360 UNLOCK_THREAD (thread);
2362 /* Awake the thread */
2363 if (!mono_thread_info_resume (thread_get_tid (thread)))
2366 LOCK_THREAD (thread);
2368 thread->state &= ~ThreadState_Suspended;
2374 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2376 if (!thread->internal_thread) {
2377 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2379 LOCK_THREAD (thread->internal_thread);
2380 if (!mono_thread_resume (thread->internal_thread))
2381 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2382 UNLOCK_THREAD (thread->internal_thread);
2387 mono_threads_is_critical_method (MonoMethod *method)
2389 switch (method->wrapper_type) {
2390 case MONO_WRAPPER_RUNTIME_INVOKE:
2391 case MONO_WRAPPER_XDOMAIN_INVOKE:
2392 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2399 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2404 if (mono_threads_is_critical_method (m)) {
2405 *((gboolean*)data) = TRUE;
2412 is_running_protected_wrapper (void)
2414 gboolean found = FALSE;
2415 mono_stack_walk (find_wrapper, &found);
2419 void mono_thread_internal_stop (MonoInternalThread *thread)
2421 LOCK_THREAD (thread);
2423 if ((thread->state & ThreadState_StopRequested) != 0 ||
2424 (thread->state & ThreadState_Stopped) != 0)
2426 UNLOCK_THREAD (thread);
2430 /* Make sure the thread is awake */
2431 mono_thread_resume (thread);
2433 thread->state |= ThreadState_StopRequested;
2434 thread->state &= ~ThreadState_AbortRequested;
2436 UNLOCK_THREAD (thread);
2438 if (thread == mono_thread_internal_current ())
2439 self_abort_internal ();
2441 async_abort_internal (thread, TRUE);
2444 void mono_thread_stop (MonoThread *thread)
2446 mono_thread_internal_stop (thread->internal_thread);
2450 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2452 gint8 tmp = *(volatile gint8 *)ptr;
2453 mono_memory_barrier ();
2458 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2460 gint16 tmp = *(volatile gint16 *)ptr;
2461 mono_memory_barrier ();
2466 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2468 gint32 tmp = *(volatile gint32 *)ptr;
2469 mono_memory_barrier ();
2474 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2476 gint64 tmp = *(volatile gint64 *)ptr;
2477 mono_memory_barrier ();
2482 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2484 volatile void *tmp = *(volatile void **)ptr;
2485 mono_memory_barrier ();
2486 return (void *) tmp;
2490 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2492 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2493 mono_memory_barrier ();
2494 return (MonoObject *) tmp;
2498 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2500 double tmp = *(volatile double *)ptr;
2501 mono_memory_barrier ();
2506 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2508 float tmp = *(volatile float *)ptr;
2509 mono_memory_barrier ();
2514 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2516 return InterlockedRead8 ((volatile gint8 *)ptr);
2520 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2522 return InterlockedRead16 ((volatile gint16 *)ptr);
2526 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2528 return InterlockedRead ((volatile gint32 *)ptr);
2532 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2534 #if SIZEOF_VOID_P == 4
2535 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2537 mono_interlocked_lock ();
2538 val = *(gint64*)ptr;
2539 mono_interlocked_unlock ();
2543 return InterlockedRead64 ((volatile gint64 *)ptr);
2547 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2549 return InterlockedReadPointer ((volatile gpointer *)ptr);
2553 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2557 #if SIZEOF_VOID_P == 4
2558 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2560 mono_interlocked_lock ();
2561 val = *(double*)ptr;
2562 mono_interlocked_unlock ();
2567 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2573 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2577 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2583 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2585 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2589 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2591 mono_memory_barrier ();
2592 *(volatile gint8 *)ptr = value;
2596 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2598 mono_memory_barrier ();
2599 *(volatile gint16 *)ptr = value;
2603 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2605 mono_memory_barrier ();
2606 *(volatile gint32 *)ptr = value;
2610 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2612 mono_memory_barrier ();
2613 *(volatile gint64 *)ptr = value;
2617 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2619 mono_memory_barrier ();
2620 *(volatile void **)ptr = value;
2624 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2626 mono_memory_barrier ();
2627 mono_gc_wbarrier_generic_store (ptr, value);
2631 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2633 mono_memory_barrier ();
2634 *(volatile double *)ptr = value;
2638 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2640 mono_memory_barrier ();
2641 *(volatile float *)ptr = value;
2645 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2647 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2651 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2653 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2657 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2659 InterlockedWrite ((volatile gint32 *)ptr, value);
2663 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2665 #if SIZEOF_VOID_P == 4
2666 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2667 mono_interlocked_lock ();
2668 *(gint64*)ptr = value;
2669 mono_interlocked_unlock ();
2674 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2678 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2680 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2684 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2688 #if SIZEOF_VOID_P == 4
2689 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2690 mono_interlocked_lock ();
2691 *(double*)ptr = value;
2692 mono_interlocked_unlock ();
2699 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2703 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2709 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2713 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2715 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2719 free_context (void *user_data)
2721 ContextStaticData *data = user_data;
2723 mono_threads_lock ();
2726 * There is no guarantee that, by the point this reference queue callback
2727 * has been invoked, the GC handle associated with the object will fail to
2728 * resolve as one might expect. So if we don't free and remove the GC
2729 * handle here, free_context_static_data_helper () could end up resolving
2730 * a GC handle to an actually-dead context which would contain a pointer
2731 * to an already-freed static data segment, resulting in a crash when
2734 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2736 mono_threads_unlock ();
2738 mono_gchandle_free (data->gc_handle);
2739 mono_free_static_data (data->static_data);
2744 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2746 mono_threads_lock ();
2748 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2751 contexts = g_hash_table_new (NULL, NULL);
2754 context_queue = mono_gc_reference_queue_new (free_context);
2756 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2757 g_hash_table_insert (contexts, gch, gch);
2760 * We use this intermediate structure to contain a duplicate pointer to
2761 * the static data because we can't rely on being able to resolve the GC
2762 * handle in the reference queue callback.
2764 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2765 data->gc_handle = GPOINTER_TO_UINT (gch);
2768 context_adjust_static_data (ctx);
2769 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2771 mono_threads_unlock ();
2773 mono_profiler_context_loaded (ctx);
2777 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2780 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2781 * cleanup in exceptional circumstances, we don't actually do any
2782 * cleanup work here. We instead do this via a reference queue.
2785 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2787 mono_profiler_context_unloaded (ctx);
2791 mono_thread_init_tls (void)
2793 MONO_FAST_TLS_INIT (tls_current_object);
2794 mono_native_tls_alloc (¤t_object_key, NULL);
2797 void mono_thread_init (MonoThreadStartCB start_cb,
2798 MonoThreadAttachCB attach_cb)
2800 mono_coop_mutex_init_recursive (&threads_mutex);
2802 mono_os_mutex_init_recursive(&interlocked_mutex);
2803 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2805 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2806 g_assert(background_change_event != NULL);
2808 mono_init_static_data_info (&thread_static_info);
2809 mono_init_static_data_info (&context_static_info);
2811 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2813 mono_thread_start_cb = start_cb;
2814 mono_thread_attach_cb = attach_cb;
2816 /* Get a pseudo handle to the current process. This is just a
2817 * kludge so that wapi can build a process handle if needed.
2818 * As a pseudo handle is returned, we don't need to clean
2821 GetCurrentProcess ();
2824 void mono_thread_cleanup (void)
2826 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2827 MonoThreadInfo *info;
2829 /* The main thread must abandon any held mutexes (particularly
2830 * important for named mutexes as they are shared across
2831 * processes, see bug 74680.) This will happen when the
2832 * thread exits, but if it's not running in a subthread it
2833 * won't exit in time.
2835 info = mono_thread_info_current ();
2836 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2840 /* This stuff needs more testing, it seems one of these
2841 * critical sections can be locked when mono_thread_cleanup is
2844 mono_coop_mutex_destroy (&threads_mutex);
2845 mono_os_mutex_destroy (&interlocked_mutex);
2846 mono_os_mutex_destroy (&delayed_free_table_mutex);
2847 mono_os_mutex_destroy (&small_id_mutex);
2848 CloseHandle (background_change_event);
2851 mono_native_tls_free (current_object_key);
2855 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2857 mono_thread_cleanup_fn = func;
2861 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2863 thread->internal_thread->manage_callback = func;
2867 static void print_tids (gpointer key, gpointer value, gpointer user)
2869 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2870 * sizeof(uint) and a cast to uint would overflow
2872 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2873 * print this as a pointer.
2875 g_message ("Waiting for: %p", key);
2880 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2881 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2885 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2889 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2891 MONO_PREPARE_BLOCKING;
2892 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2893 MONO_FINISH_BLOCKING;
2895 if(ret==WAIT_FAILED) {
2896 /* See the comment in build_wait_tids() */
2897 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2901 for(i=0; i<wait->num; i++)
2902 CloseHandle (wait->handles[i]);
2904 if (ret == WAIT_TIMEOUT)
2907 for(i=0; i<wait->num; i++) {
2908 gsize tid = wait->threads[i]->tid;
2911 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2912 * it can still run io-layer etc. code. So wait for it to really exit.
2913 * FIXME: This won't join threads which are not in the joinable_hash yet.
2915 mono_thread_join ((gpointer)tid);
2917 mono_threads_lock ();
2918 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2919 /* This thread must have been killed, because
2920 * it hasn't cleaned itself up. (It's just
2921 * possible that the thread exited before the
2922 * parent thread had a chance to store the
2923 * handle, and now there is another pointer to
2924 * the already-exited thread stored. In this
2925 * case, we'll just get two
2926 * mono_profiler_thread_end() calls for the
2930 mono_threads_unlock ();
2931 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2932 thread_cleanup (wait->threads[i]);
2934 mono_threads_unlock ();
2939 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2941 guint32 i, ret, count;
2943 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2945 /* Add the thread state change event, so it wakes up if a thread changes
2946 * to background mode.
2949 if (count < MAXIMUM_WAIT_OBJECTS) {
2950 wait->handles [count] = background_change_event;
2954 MONO_PREPARE_BLOCKING;
2955 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2956 MONO_FINISH_BLOCKING;
2958 if(ret==WAIT_FAILED) {
2959 /* See the comment in build_wait_tids() */
2960 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2964 for(i=0; i<wait->num; i++)
2965 CloseHandle (wait->handles[i]);
2967 if (ret == WAIT_TIMEOUT)
2970 if (ret < wait->num) {
2971 gsize tid = wait->threads[ret]->tid;
2972 mono_threads_lock ();
2973 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2974 /* See comment in wait_for_tids about thread cleanup */
2975 mono_threads_unlock ();
2976 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2977 thread_cleanup (wait->threads [ret]);
2979 mono_threads_unlock ();
2983 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2985 struct wait_data *wait=(struct wait_data *)user;
2987 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2989 MonoInternalThread *thread=(MonoInternalThread *)value;
2991 /* Ignore background threads, we abort them later */
2992 /* Do not lock here since it is not needed and the caller holds threads_lock */
2993 if (thread->state & ThreadState_Background) {
2994 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2995 return; /* just leave, ignore */
2998 if (mono_gc_is_finalizer_internal_thread (thread)) {
2999 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3003 if (thread == mono_thread_internal_current ()) {
3004 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3008 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3009 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3013 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3014 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3018 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3019 if (handle == NULL) {
3020 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3024 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3025 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3026 wait->handles[wait->num]=handle;
3027 wait->threads[wait->num]=thread;
3030 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3032 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3037 /* Just ignore the rest, we can't do anything with
3044 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3046 struct wait_data *wait=(struct wait_data *)user;
3047 MonoNativeThreadId self = mono_native_thread_id_get ();
3048 MonoInternalThread *thread = (MonoInternalThread *)value;
3051 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3054 /* The finalizer thread is not a background thread */
3055 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3056 && (thread->state & ThreadState_Background) != 0
3057 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3059 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3063 /* printf ("A: %d\n", wait->num); */
3064 wait->handles[wait->num]=thread->handle;
3065 wait->threads[wait->num]=thread;
3068 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3069 mono_thread_internal_stop (thread);
3073 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3074 && !mono_gc_is_finalizer_internal_thread (thread);
3078 * mono_threads_set_shutting_down:
3080 * Is called by a thread that wants to shut down Mono. If the runtime is already
3081 * shutting down, the calling thread is suspended/stopped, and this function never
3085 mono_threads_set_shutting_down (void)
3087 MonoInternalThread *current_thread = mono_thread_internal_current ();
3089 mono_threads_lock ();
3091 if (shutting_down) {
3092 mono_threads_unlock ();
3094 /* Make sure we're properly suspended/stopped */
3096 LOCK_THREAD (current_thread);
3098 if ((current_thread->state & ThreadState_SuspendRequested) ||
3099 (current_thread->state & ThreadState_AbortRequested) ||
3100 (current_thread->state & ThreadState_StopRequested)) {
3101 UNLOCK_THREAD (current_thread);
3102 mono_thread_execute_interruption ();
3104 current_thread->state |= ThreadState_Stopped;
3105 UNLOCK_THREAD (current_thread);
3108 /*since we're killing the thread, unset the current domain.*/
3109 mono_domain_unset ();
3111 /* Wake up other threads potentially waiting for us */
3112 mono_thread_info_exit ();
3114 shutting_down = TRUE;
3116 /* Not really a background state change, but this will
3117 * interrupt the main thread if it is waiting for all
3118 * the other threads.
3120 SetEvent (background_change_event);
3122 mono_threads_unlock ();
3126 void mono_thread_manage (void)
3128 struct wait_data wait_data;
3129 struct wait_data *wait = &wait_data;
3131 memset (wait, 0, sizeof (struct wait_data));
3132 /* join each thread that's still running */
3133 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3135 mono_threads_lock ();
3137 THREAD_DEBUG (g_message("%s: No threads", __func__));
3138 mono_threads_unlock ();
3141 mono_threads_unlock ();
3144 mono_threads_lock ();
3145 if (shutting_down) {
3146 /* somebody else is shutting down */
3147 mono_threads_unlock ();
3150 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3151 mono_g_hash_table_foreach (threads, print_tids, NULL));
3153 ResetEvent (background_change_event);
3155 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3156 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3157 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3158 mono_threads_unlock ();
3160 /* Something to wait for */
3161 wait_for_tids_or_state_change (wait, INFINITE);
3163 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3164 } while(wait->num>0);
3166 /* Mono is shutting down, so just wait for the end */
3167 if (!mono_runtime_try_shutdown ()) {
3168 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3169 mono_thread_suspend (mono_thread_internal_current ());
3170 mono_thread_execute_interruption ();
3174 * Remove everything but the finalizer thread and self.
3175 * Also abort all the background threads
3178 mono_threads_lock ();
3181 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3182 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3183 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3185 mono_threads_unlock ();
3187 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3189 /* Something to wait for */
3190 wait_for_tids (wait, INFINITE);
3192 } while (wait->num > 0);
3195 * give the subthreads a chance to really quit (this is mainly needed
3196 * to get correct user and system times from getrusage/wait/time(1)).
3197 * This could be removed if we avoid pthread_detach() and use pthread_join().
3199 mono_thread_info_yield ();
3203 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3205 MonoInternalThread *thread = (MonoInternalThread*)value;
3206 struct wait_data *wait = (struct wait_data*)user_data;
3210 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3212 * This needs no locking.
3214 if ((thread->state & ThreadState_Suspended) != 0 ||
3215 (thread->state & ThreadState_Stopped) != 0)
3218 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3219 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3223 wait->handles [wait->num] = handle;
3224 wait->threads [wait->num] = thread;
3230 * mono_thread_suspend_all_other_threads:
3232 * Suspend all managed threads except the finalizer thread and this thread. It is
3233 * not possible to resume them later.
3235 void mono_thread_suspend_all_other_threads (void)
3237 struct wait_data wait_data;
3238 struct wait_data *wait = &wait_data;
3240 MonoNativeThreadId self = mono_native_thread_id_get ();
3241 guint32 eventidx = 0;
3242 gboolean starting, finished;
3244 memset (wait, 0, sizeof (struct wait_data));
3246 * The other threads could be in an arbitrary state at this point, i.e.
3247 * they could be starting up, shutting down etc. This means that there could be
3248 * threads which are not even in the threads hash table yet.
3252 * First we set a barrier which will be checked by all threads before they
3253 * are added to the threads hash table, and they will exit if the flag is set.
3254 * This ensures that no threads could be added to the hash later.
3255 * We will use shutting_down as the barrier for now.
3257 g_assert (shutting_down);
3260 * We make multiple calls to WaitForMultipleObjects since:
3261 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3262 * - some threads could exit without becoming suspended
3267 * Make a copy of the hashtable since we can't do anything with
3268 * threads while threads_mutex is held.
3271 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3272 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3273 mono_threads_lock ();
3274 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3275 mono_threads_unlock ();
3278 /* Get the suspended events that we'll be waiting for */
3279 for (i = 0; i < wait->num; ++i) {
3280 MonoInternalThread *thread = wait->threads [i];
3282 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3283 || mono_gc_is_finalizer_internal_thread (thread)
3284 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3286 //CloseHandle (wait->handles [i]);
3287 wait->threads [i] = NULL; /* ignore this thread in next loop */
3291 LOCK_THREAD (thread);
3293 if ((thread->state & ThreadState_Suspended) != 0 ||
3294 (thread->state & ThreadState_StopRequested) != 0 ||
3295 (thread->state & ThreadState_Stopped) != 0) {
3296 UNLOCK_THREAD (thread);
3297 CloseHandle (wait->handles [i]);
3298 wait->threads [i] = NULL; /* ignore this thread in next loop */
3304 /* Convert abort requests into suspend requests */
3305 if ((thread->state & ThreadState_AbortRequested) != 0)
3306 thread->state &= ~ThreadState_AbortRequested;
3308 thread->state |= ThreadState_SuspendRequested;
3310 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3311 async_suspend_internal (thread, TRUE);
3313 if (eventidx <= 0) {
3315 * If there are threads which are starting up, we wait until they
3316 * are suspended when they try to register in the threads hash.
3317 * This is guaranteed to finish, since the threads which can create new
3318 * threads get suspended after a while.
3319 * FIXME: The finalizer thread can still create new threads.
3321 mono_threads_lock ();
3322 if (threads_starting_up)
3323 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3326 mono_threads_unlock ();
3328 mono_thread_info_sleep (100, NULL);
3336 MonoInternalThread *thread;
3337 MonoStackFrameInfo *frames;
3338 int nframes, max_frames;
3339 int nthreads, max_threads;
3340 MonoInternalThread **threads;
3341 } ThreadDumpUserData;
3343 static gboolean thread_dump_requested;
3345 /* This needs to be async safe */
3347 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3349 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3351 if (ud->nframes < ud->max_frames) {
3352 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3359 /* This needs to be async safe */
3360 static SuspendThreadResult
3361 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3363 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3364 MonoInternalThread *thread = user_data->thread;
3367 /* This no longer works with remote unwinding */
3369 wapi_desc = wapi_current_thread_desc ();
3370 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3375 if (thread == mono_thread_internal_current ())
3376 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3378 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3380 return MonoResumeThread;
3384 int nthreads, max_threads;
3385 MonoInternalThread **threads;
3386 } CollectThreadsUserData;
3389 collect_thread (gpointer key, gpointer value, gpointer user)
3391 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3392 MonoInternalThread *thread = (MonoInternalThread *)value;
3394 if (ud->nthreads < ud->max_threads)
3395 ud->threads [ud->nthreads ++] = thread;
3399 * Collect running threads into the THREADS array.
3400 * THREADS should be an array allocated on the stack.
3403 collect_threads (MonoInternalThread **thread_array, int max_threads)
3405 CollectThreadsUserData ud;
3407 memset (&ud, 0, sizeof (ud));
3408 /* This array contains refs, but its on the stack, so its ok */
3409 ud.threads = thread_array;
3410 ud.max_threads = max_threads;
3412 mono_threads_lock ();
3413 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3414 mono_threads_unlock ();
3420 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3422 GString* text = g_string_new (0);
3424 GError *error = NULL;
3427 ud->thread = thread;
3430 /* Collect frames for the thread */
3431 if (thread == mono_thread_internal_current ()) {
3432 get_thread_dump (mono_thread_info_current (), ud);
3434 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3438 * Do all the non async-safe work outside of get_thread_dump.
3441 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3443 g_string_append_printf (text, "\n\"%s\"", name);
3446 else if (thread->threadpool_thread) {
3447 g_string_append (text, "\n\"<threadpool thread>\"");
3449 g_string_append (text, "\n\"<unnamed thread>\"");
3452 for (i = 0; i < ud->nframes; ++i) {
3453 MonoStackFrameInfo *frame = &ud->frames [i];
3454 MonoMethod *method = NULL;
3456 if (frame->type == FRAME_TYPE_MANAGED)
3457 method = mono_jit_info_get_method (frame->ji);
3460 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3461 g_string_append_printf (text, " %s\n", location);
3464 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3468 fprintf (stdout, "%s", text->str);
3470 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3471 OutputDebugStringA(text->str);
3474 g_string_free (text, TRUE);
3479 mono_threads_perform_thread_dump (void)
3481 ThreadDumpUserData ud;
3482 MonoInternalThread *thread_array [128];
3483 int tindex, nthreads;
3485 if (!thread_dump_requested)
3488 printf ("Full thread dump:\n");
3490 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3491 nthreads = collect_threads (thread_array, 128);
3493 memset (&ud, 0, sizeof (ud));
3494 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3495 ud.max_frames = 256;
3497 for (tindex = 0; tindex < nthreads; ++tindex)
3498 dump_thread (thread_array [tindex], &ud);
3502 thread_dump_requested = FALSE;
3505 /* Obtain the thread dump of all threads */
3507 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3511 ThreadDumpUserData ud;
3512 MonoInternalThread *thread_array [128];
3513 MonoDomain *domain = mono_domain_get ();
3514 MonoDebugSourceLocation *location;
3515 int tindex, nthreads;
3517 mono_error_init (&error);
3519 *out_threads = NULL;
3520 *out_stack_frames = NULL;
3522 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3523 nthreads = collect_threads (thread_array, 128);
3525 memset (&ud, 0, sizeof (ud));
3526 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3527 ud.max_frames = 256;
3529 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3530 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3532 for (tindex = 0; tindex < nthreads; ++tindex) {
3533 MonoInternalThread *thread = thread_array [tindex];
3534 MonoArray *thread_frames;
3540 /* Collect frames for the thread */
3541 if (thread == mono_thread_internal_current ()) {
3542 get_thread_dump (mono_thread_info_current (), &ud);
3544 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3547 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3549 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3550 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3552 for (i = 0; i < ud.nframes; ++i) {
3553 MonoStackFrameInfo *frame = &ud.frames [i];
3554 MonoMethod *method = NULL;
3555 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3556 if (!mono_error_ok (&error))
3559 sf->native_offset = frame->native_offset;
3561 if (frame->type == FRAME_TYPE_MANAGED)
3562 method = mono_jit_info_get_method (frame->ji);
3565 sf->method_address = (gsize) frame->ji->code_start;
3567 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3568 mono_error_raise_exception (&error); /* FIXME don't raise here */
3569 MONO_OBJECT_SETREF (sf, method, rm);
3571 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3573 sf->il_offset = location->il_offset;
3575 if (location && location->source_file) {
3576 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3577 sf->line = location->row;
3578 sf->column = location->column;
3580 mono_debug_free_source_location (location);
3585 mono_array_setref (thread_frames, i, sf);
3591 mono_error_raise_exception (&error); /* FIXME don't raise here */
3595 * mono_threads_request_thread_dump:
3597 * Ask all threads except the current to print their stacktrace to stdout.
3600 mono_threads_request_thread_dump (void)
3602 /*The new thread dump code runs out of the finalizer thread. */
3603 thread_dump_requested = TRUE;
3604 mono_gc_finalize_notify ();
3609 gint allocated; /* +1 so that refs [allocated] == NULL */
3613 typedef struct ref_stack RefStack;
3616 ref_stack_new (gint initial_size)
3620 initial_size = MAX (initial_size, 16) + 1;
3621 rs = g_new0 (RefStack, 1);
3622 rs->refs = g_new0 (gpointer, initial_size);
3623 rs->allocated = initial_size;
3628 ref_stack_destroy (gpointer ptr)
3630 RefStack *rs = (RefStack *)ptr;
3639 ref_stack_push (RefStack *rs, gpointer ptr)
3641 g_assert (rs != NULL);
3643 if (rs->bottom >= rs->allocated) {
3644 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3645 rs->allocated <<= 1;
3646 rs->refs [rs->allocated] = NULL;
3648 rs->refs [rs->bottom++] = ptr;
3652 ref_stack_pop (RefStack *rs)
3654 if (rs == NULL || rs->bottom == 0)
3658 rs->refs [rs->bottom] = NULL;
3662 ref_stack_find (RefStack *rs, gpointer ptr)
3669 for (refs = rs->refs; refs && *refs; refs++) {
3677 * mono_thread_push_appdomain_ref:
3679 * Register that the current thread may have references to objects in domain
3680 * @domain on its stack. Each call to this function should be paired with a
3681 * call to pop_appdomain_ref.
3684 mono_thread_push_appdomain_ref (MonoDomain *domain)
3686 MonoInternalThread *thread = mono_thread_internal_current ();
3689 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3690 SPIN_LOCK (thread->lock_thread_id);
3691 if (thread->appdomain_refs == NULL)
3692 thread->appdomain_refs = ref_stack_new (16);
3693 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3694 SPIN_UNLOCK (thread->lock_thread_id);
3699 mono_thread_pop_appdomain_ref (void)
3701 MonoInternalThread *thread = mono_thread_internal_current ();
3704 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3705 SPIN_LOCK (thread->lock_thread_id);
3706 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3707 SPIN_UNLOCK (thread->lock_thread_id);
3712 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3715 SPIN_LOCK (thread->lock_thread_id);
3716 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3717 SPIN_UNLOCK (thread->lock_thread_id);
3722 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3724 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3727 typedef struct abort_appdomain_data {
3728 struct wait_data wait;
3730 } abort_appdomain_data;
3733 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3735 MonoInternalThread *thread = (MonoInternalThread*)value;
3736 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3737 MonoDomain *domain = data->domain;
3739 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3740 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3742 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3743 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3746 data->wait.handles [data->wait.num] = handle;
3747 data->wait.threads [data->wait.num] = thread;
3750 /* Just ignore the rest, we can't do anything with
3758 * mono_threads_abort_appdomain_threads:
3760 * Abort threads which has references to the given appdomain.
3763 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3765 #ifdef __native_client__
3769 abort_appdomain_data user_data;
3771 int orig_timeout = timeout;
3774 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3776 start_time = mono_msec_ticks ();
3778 mono_threads_lock ();
3780 user_data.domain = domain;
3781 user_data.wait.num = 0;
3782 /* This shouldn't take any locks */
3783 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3784 mono_threads_unlock ();
3786 if (user_data.wait.num > 0) {
3787 /* Abort the threads outside the threads lock */
3788 for (i = 0; i < user_data.wait.num; ++i)
3789 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3792 * We should wait for the threads either to abort, or to leave the
3793 * domain. We can't do the latter, so we wait with a timeout.
3795 wait_for_tids (&user_data.wait, 100);
3798 /* Update remaining time */
3799 timeout -= mono_msec_ticks () - start_time;
3800 start_time = mono_msec_ticks ();
3802 if (orig_timeout != -1 && timeout < 0)
3805 while (user_data.wait.num > 0);
3807 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3813 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3815 MonoInternalThread *thread = (MonoInternalThread*)value;
3816 MonoDomain *domain = (MonoDomain*)user_data;
3819 /* No locking needed here */
3820 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3822 if (thread->cached_culture_info) {
3823 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3824 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3825 if (obj && obj->vtable->domain == domain)
3826 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3832 * mono_threads_clear_cached_culture:
3834 * Clear the cached_current_culture from all threads if it is in the
3838 mono_threads_clear_cached_culture (MonoDomain *domain)
3840 mono_threads_lock ();
3841 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3842 mono_threads_unlock ();
3846 * mono_thread_get_undeniable_exception:
3848 * Return an exception which needs to be raised when leaving a catch clause.
3849 * This is used for undeniable exception propagation.
3852 mono_thread_get_undeniable_exception (void)
3854 MonoInternalThread *thread = mono_thread_internal_current ();
3856 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3858 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3859 * exception if the thread no longer references a dying appdomain.
3861 thread->abort_exc->trace_ips = NULL;
3862 thread->abort_exc->stack_trace = NULL;
3863 return thread->abort_exc;
3869 #if MONO_SMALL_CONFIG
3870 #define NUM_STATIC_DATA_IDX 4
3871 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3875 #define NUM_STATIC_DATA_IDX 8
3876 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3877 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3881 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3882 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3885 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3887 gpointer *static_data = (gpointer *)addr;
3889 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3890 void **ptr = (void **)static_data [i];
3895 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3896 void **p = ptr + idx;
3899 mark_func ((MonoObject**)p, gc_data);
3905 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3907 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3911 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3913 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3917 * mono_alloc_static_data
3919 * Allocate memory blocks for storing threads or context static data
3922 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3924 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3927 gpointer* static_data = *static_data_ptr;
3929 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3930 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3932 if (mono_gc_user_markers_supported ()) {
3933 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3934 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3936 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3937 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3940 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3941 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3942 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3943 *static_data_ptr = static_data;
3944 static_data [0] = static_data;
3947 for (i = 1; i <= idx; ++i) {
3948 if (static_data [i])
3951 if (mono_gc_user_markers_supported ())
3952 static_data [i] = g_malloc0 (static_data_size [i]);
3954 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3955 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3956 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3961 mono_free_static_data (gpointer* static_data)
3964 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3965 gpointer p = static_data [i];
3969 * At this point, the static data pointer array is still registered with the
3970 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3971 * data. Freeing the individual arrays without first nulling their slots
3972 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3973 * such an already freed array. See bug #13813.
3975 static_data [i] = NULL;
3976 mono_memory_write_barrier ();
3977 if (mono_gc_user_markers_supported ())
3980 mono_gc_free_fixed (p);
3982 mono_gc_free_fixed (static_data);
3986 * mono_init_static_data_info
3988 * Initializes static data counters
3990 static void mono_init_static_data_info (StaticDataInfo *static_data)
3992 static_data->idx = 0;
3993 static_data->offset = 0;
3994 static_data->freelist = NULL;
3998 * mono_alloc_static_data_slot
4000 * Generates an offset for static data. static_data contains the counters
4001 * used to generate it.
4004 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4006 if (!static_data->idx && !static_data->offset) {
4008 * we use the first chunk of the first allocation also as
4009 * an array for the rest of the data
4011 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4013 static_data->offset += align - 1;
4014 static_data->offset &= ~(align - 1);
4015 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4016 static_data->idx ++;
4017 g_assert (size <= static_data_size [static_data->idx]);
4018 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4019 static_data->offset = 0;
4021 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4022 static_data->offset += size;
4027 * ensure thread static fields already allocated are valid for thread
4028 * This function is called when a thread is created or on thread attach.
4031 thread_adjust_static_data (MonoInternalThread *thread)
4033 mono_threads_lock ();
4034 if (thread_static_info.offset || thread_static_info.idx > 0) {
4035 /* get the current allocated size */
4036 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4037 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4039 mono_threads_unlock ();
4043 * LOCKING: requires that threads_mutex is held
4046 context_adjust_static_data (MonoAppContext *ctx)
4048 if (context_static_info.offset || context_static_info.idx > 0) {
4049 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4050 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4051 ctx->data->static_data = ctx->static_data;
4056 * LOCKING: requires that threads_mutex is held
4059 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4061 MonoInternalThread *thread = (MonoInternalThread *)value;
4062 guint32 offset = GPOINTER_TO_UINT (user);
4064 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4068 * LOCKING: requires that threads_mutex is held
4071 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4073 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4078 guint32 offset = GPOINTER_TO_UINT (user);
4079 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4080 ctx->data->static_data = ctx->static_data;
4083 static StaticDataFreeList*
4084 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4086 StaticDataFreeList* prev = NULL;
4087 StaticDataFreeList* tmp = static_data->freelist;
4089 if (tmp->size == size) {
4091 prev->next = tmp->next;
4093 static_data->freelist = tmp->next;
4102 #if SIZEOF_VOID_P == 4
4109 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4111 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4113 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4114 MonoBitSet *rb = sets [idx];
4115 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4116 offset /= sizeof (uintptr_t);
4117 /* offset is now the bitmap offset */
4118 for (int i = 0; i < numbits; ++i) {
4119 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4120 mono_bitset_set_fast (rb, offset + i);
4125 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4127 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4128 MonoBitSet *rb = sets [idx];
4129 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4130 offset /= sizeof (uintptr_t);
4131 /* offset is now the bitmap offset */
4132 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4133 mono_bitset_clear_fast (rb, offset + i);
4137 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4139 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4141 StaticDataInfo *info;
4144 if (static_type == SPECIAL_STATIC_THREAD) {
4145 info = &thread_static_info;
4146 sets = thread_reference_bitmaps;
4148 info = &context_static_info;
4149 sets = context_reference_bitmaps;
4152 mono_threads_lock ();
4154 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4158 offset = item->offset;
4161 offset = mono_alloc_static_data_slot (info, size, align);
4164 update_reference_bitmap (sets, offset, bitmap, numbits);
4166 if (static_type == SPECIAL_STATIC_THREAD) {
4167 /* This can be called during startup */
4168 if (threads != NULL)
4169 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4171 if (contexts != NULL)
4172 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4174 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4177 mono_threads_unlock ();
4183 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4185 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4187 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4188 return get_thread_static_data (thread, offset);
4190 return get_context_static_data (thread->current_appcontext, offset);
4195 mono_get_special_static_data (guint32 offset)
4197 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4206 * LOCKING: requires that threads_mutex is held
4209 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4211 MonoInternalThread *thread = (MonoInternalThread *)value;
4212 OffsetSize *data = (OffsetSize *)user;
4213 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4214 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4217 if (!thread->static_data || !thread->static_data [idx])
4219 ptr = ((char*) thread->static_data [idx]) + off;
4220 mono_gc_bzero_atomic (ptr, data->size);
4224 * LOCKING: requires that threads_mutex is held
4227 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4229 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4234 OffsetSize *data = (OffsetSize *)user;
4235 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4236 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4239 if (!ctx->static_data || !ctx->static_data [idx])
4242 ptr = ((char*) ctx->static_data [idx]) + off;
4243 mono_gc_bzero_atomic (ptr, data->size);
4247 do_free_special_slot (guint32 offset, guint32 size)
4249 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4251 StaticDataInfo *info;
4253 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4254 info = &thread_static_info;
4255 sets = thread_reference_bitmaps;
4257 info = &context_static_info;
4258 sets = context_reference_bitmaps;
4261 guint32 data_offset = offset;
4262 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4263 OffsetSize data = { data_offset, size };
4265 clear_reference_bitmap (sets, data.offset, data.size);
4267 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4268 if (threads != NULL)
4269 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4271 if (contexts != NULL)
4272 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4275 if (!mono_runtime_is_shutting_down ()) {
4276 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4278 item->offset = offset;
4281 item->next = info->freelist;
4282 info->freelist = item;
4287 do_free_special (gpointer key, gpointer value, gpointer data)
4289 MonoClassField *field = (MonoClassField *)key;
4290 guint32 offset = GPOINTER_TO_UINT (value);
4293 size = mono_type_size (field->type, &align);
4294 do_free_special_slot (offset, size);
4298 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4300 mono_threads_lock ();
4302 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4304 mono_threads_unlock ();
4308 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4310 /* Only ever called for ThreadLocal instances */
4311 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4313 mono_threads_lock ();
4314 do_free_special_slot (offset, size);
4315 mono_threads_unlock ();
4319 static void CALLBACK dummy_apc (ULONG_PTR param)
4325 * mono_thread_execute_interruption
4327 * Performs the operation that the requested thread state requires (abort,
4330 static MonoException*
4331 mono_thread_execute_interruption (void)
4333 MonoInternalThread *thread = mono_thread_internal_current ();
4334 MonoThread *sys_thread = mono_thread_current ();
4336 LOCK_THREAD (thread);
4338 /* MonoThread::interruption_requested can only be changed with atomics */
4339 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4340 /* this will consume pending APC calls */
4342 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4344 InterlockedDecrement (&thread_interruption_requested);
4346 /* Clear the interrupted flag of the thread so it can wait again */
4347 mono_thread_info_clear_self_interrupt ();
4350 if ((thread->state & ThreadState_AbortRequested) != 0) {
4351 UNLOCK_THREAD (thread);
4352 if (thread->abort_exc == NULL) {
4354 * This might be racy, but it has to be called outside the lock
4355 * since it calls managed code.
4357 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4359 return thread->abort_exc;
4361 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4362 /* calls UNLOCK_THREAD (thread) */
4363 self_suspend_internal ();
4366 else if ((thread->state & ThreadState_StopRequested) != 0) {
4367 /* FIXME: do this through the JIT? */
4369 UNLOCK_THREAD (thread);
4371 mono_thread_exit ();
4373 } else if (sys_thread->pending_exception) {
4376 exc = sys_thread->pending_exception;
4377 sys_thread->pending_exception = NULL;
4379 UNLOCK_THREAD (thread);
4381 } else if (thread->thread_interrupt_requested) {
4383 thread->thread_interrupt_requested = FALSE;
4384 UNLOCK_THREAD (thread);
4386 return(mono_get_exception_thread_interrupted ());
4389 UNLOCK_THREAD (thread);
4395 * mono_thread_request_interruption
4397 * A signal handler can call this method to request the interruption of a
4398 * thread. The result of the interruption will depend on the current state of
4399 * the thread. If the result is an exception that needs to be throw, it is
4400 * provided as return value.
4403 mono_thread_request_interruption (gboolean running_managed)
4405 MonoInternalThread *thread = mono_thread_internal_current ();
4407 /* The thread may already be stopping */
4412 if (thread->interrupt_on_stop &&
4413 thread->state & ThreadState_StopRequested &&
4414 thread->state & ThreadState_Background)
4418 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4420 InterlockedIncrement (&thread_interruption_requested);
4422 if (!running_managed || is_running_protected_wrapper ()) {
4423 /* Can't stop while in unmanaged code. Increase the global interruption
4424 request count. When exiting the unmanaged method the count will be
4425 checked and the thread will be interrupted. */
4427 /* this will awake the thread if it is in WaitForSingleObject
4429 /* Our implementation of this function ignores the func argument */
4431 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4433 mono_thread_info_self_interrupt ();
4438 return mono_thread_execute_interruption ();
4442 /*This function should be called by a thread after it has exited all of
4443 * its handle blocks at interruption time.*/
4445 mono_thread_resume_interruption (void)
4447 MonoInternalThread *thread = mono_thread_internal_current ();
4448 gboolean still_aborting;
4450 /* The thread may already be stopping */
4454 LOCK_THREAD (thread);
4455 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4456 UNLOCK_THREAD (thread);
4458 /*This can happen if the protected block called Thread::ResetAbort*/
4459 if (!still_aborting)
4462 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4464 InterlockedIncrement (&thread_interruption_requested);
4466 mono_thread_info_self_interrupt ();
4468 return mono_thread_execute_interruption ();
4471 gboolean mono_thread_interruption_requested ()
4473 if (thread_interruption_requested) {
4474 MonoInternalThread *thread = mono_thread_internal_current ();
4475 /* The thread may already be stopping */
4477 return (thread->interruption_requested);
4482 static MonoException*
4483 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4485 MonoInternalThread *thread = mono_thread_internal_current ();
4487 /* The thread may already be stopping */
4491 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4492 MonoException* exc = mono_thread_execute_interruption ();
4500 * Performs the interruption of the current thread, if one has been requested,
4501 * and the thread is not running a protected wrapper.
4502 * Return the exception which needs to be thrown, if any.
4505 mono_thread_interruption_checkpoint (void)
4507 return mono_thread_interruption_checkpoint_request (FALSE);
4511 * Performs the interruption of the current thread, if one has been requested.
4512 * Return the exception which needs to be thrown, if any.
4515 mono_thread_force_interruption_checkpoint_noraise (void)
4517 return mono_thread_interruption_checkpoint_request (TRUE);
4521 * mono_thread_get_and_clear_pending_exception:
4523 * Return any pending exceptions for the current thread and clear it as a side effect.
4526 mono_thread_get_and_clear_pending_exception (void)
4528 MonoInternalThread *thread = mono_thread_internal_current ();
4529 MonoThread *sys_thread = mono_thread_current ();
4531 /* The thread may already be stopping */
4535 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4536 return mono_thread_execute_interruption ();
4539 if (sys_thread->pending_exception) {
4540 MonoException *exc = sys_thread->pending_exception;
4542 sys_thread->pending_exception = NULL;
4550 * mono_set_pending_exception:
4552 * Set the pending exception of the current thread to EXC.
4553 * The exception will be thrown when execution returns to managed code.
4556 mono_set_pending_exception (MonoException *exc)
4558 MonoThread *thread = mono_thread_current ();
4560 /* The thread may already be stopping */
4564 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4566 mono_thread_request_interruption (FALSE);
4570 * mono_thread_interruption_request_flag:
4572 * Returns the address of a flag that will be non-zero if an interruption has
4573 * been requested for a thread. The thread to interrupt may not be the current
4574 * thread, so an additional call to mono_thread_interruption_requested() or
4575 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4578 gint32* mono_thread_interruption_request_flag ()
4580 return &thread_interruption_requested;
4584 mono_thread_init_apartment_state (void)
4587 MonoInternalThread* thread = mono_thread_internal_current ();
4589 /* Positive return value indicates success, either
4590 * S_OK if this is first CoInitialize call, or
4591 * S_FALSE if CoInitialize already called, but with same
4592 * threading model. A negative value indicates failure,
4593 * probably due to trying to change the threading model.
4595 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4596 ? COINIT_APARTMENTTHREADED
4597 : COINIT_MULTITHREADED) < 0) {
4598 thread->apartment_state = ThreadApartmentState_Unknown;
4604 mono_thread_cleanup_apartment_state (void)
4607 MonoInternalThread* thread = mono_thread_internal_current ();
4609 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4616 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4618 LOCK_THREAD (thread);
4619 thread->state |= state;
4620 UNLOCK_THREAD (thread);
4624 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4626 LOCK_THREAD (thread);
4627 thread->state &= ~state;
4628 UNLOCK_THREAD (thread);
4632 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4634 gboolean ret = FALSE;
4636 LOCK_THREAD (thread);
4638 if ((thread->state & test) != 0) {
4642 UNLOCK_THREAD (thread);
4647 static gboolean has_tls_get = FALSE;
4650 mono_runtime_set_has_tls_get (gboolean val)
4656 mono_runtime_has_tls_get (void)
4662 self_interrupt_thread (void *_unused)
4664 MonoThreadInfo *info = mono_thread_info_current ();
4665 MonoException *exc = mono_thread_execute_interruption ();
4666 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4667 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. */
4668 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4672 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4676 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4680 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4682 MonoJitInfo **dest = (MonoJitInfo **)data;
4688 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4690 MonoJitInfo *ji = NULL;
4695 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4696 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4697 * where we hold runtime locks.
4699 if (!mono_threads_is_coop_enabled ())
4700 mono_thread_info_set_is_async_context (TRUE);
4701 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4702 if (!mono_threads_is_coop_enabled ())
4703 mono_thread_info_set_is_async_context (FALSE);
4708 MonoInternalThread *thread;
4709 gboolean install_async_abort;
4710 MonoThreadInfoInterruptToken *interrupt_token;
4713 static SuspendThreadResult
4714 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4716 AbortThreadData *data = (AbortThreadData *)ud;
4717 MonoInternalThread *thread = data->thread;
4718 MonoJitInfo *ji = NULL;
4719 gboolean protected_wrapper;
4720 gboolean running_managed;
4722 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4723 return MonoResumeThread;
4725 /*someone is already interrupting it*/
4726 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4727 return MonoResumeThread;
4729 InterlockedIncrement (&thread_interruption_requested);
4731 ji = mono_thread_info_get_last_managed (info);
4732 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4733 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4735 if (!protected_wrapper && running_managed) {
4736 /*We are in managed code*/
4737 /*Set the thread to call */
4738 if (data->install_async_abort)
4739 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4740 return MonoResumeThread;
4743 * This will cause waits to be broken.
4744 * It will also prevent the thread from entering a wait, so if the thread returns
4745 * from the wait before it receives the abort signal, it will just spin in the wait
4746 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4749 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4751 return MonoResumeThread;
4756 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4758 AbortThreadData data;
4760 g_assert (thread != mono_thread_internal_current ());
4762 data.thread = thread;
4763 data.install_async_abort = install_async_abort;
4764 data.interrupt_token = NULL;
4766 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4767 if (data.interrupt_token)
4768 mono_thread_info_finish_interrupt (data.interrupt_token);
4769 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4773 self_abort_internal (void)
4777 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4778 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4780 exc = mono_thread_request_interruption (TRUE);
4782 mono_raise_exception (exc);
4784 mono_thread_info_self_interrupt ();
4788 MonoInternalThread *thread;
4790 MonoThreadInfoInterruptToken *interrupt_token;
4791 } SuspendThreadData;
4793 static SuspendThreadResult
4794 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4796 SuspendThreadData *data = (SuspendThreadData *)ud;
4797 MonoInternalThread *thread = data->thread;
4798 MonoJitInfo *ji = NULL;
4799 gboolean protected_wrapper;
4800 gboolean running_managed;
4802 ji = mono_thread_info_get_last_managed (info);
4803 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4804 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4806 if (running_managed && !protected_wrapper) {
4807 thread->state &= ~ThreadState_SuspendRequested;
4808 thread->state |= ThreadState_Suspended;
4809 return KeepSuspended;
4811 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4812 InterlockedIncrement (&thread_interruption_requested);
4813 if (data->interrupt)
4814 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4816 return MonoResumeThread;
4820 /* LOCKING: called with @thread synch_cs held, and releases it */
4822 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4824 SuspendThreadData data;
4826 g_assert (thread != mono_thread_internal_current ());
4828 data.thread = thread;
4829 data.interrupt = interrupt;
4830 data.interrupt_token = NULL;
4832 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4833 if (data.interrupt_token)
4834 mono_thread_info_finish_interrupt (data.interrupt_token);
4836 UNLOCK_THREAD (thread);
4839 /* LOCKING: called with @thread synch_cs held, and releases it */
4841 self_suspend_internal (void)
4843 MonoInternalThread *thread;
4845 thread = mono_thread_internal_current ();
4847 mono_thread_info_begin_self_suspend ();
4848 thread->state &= ~ThreadState_SuspendRequested;
4849 thread->state |= ThreadState_Suspended;
4851 UNLOCK_THREAD (thread);
4853 mono_thread_info_end_self_suspend ();
4857 * mono_thread_is_foreign:
4858 * @thread: the thread to query
4860 * This function allows one to determine if a thread was created by the mono runtime and has
4861 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4863 * Returns: TRUE if @thread was not created by the runtime.
4866 mono_thread_is_foreign (MonoThread *thread)
4868 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4869 return info->runtime_thread == FALSE;
4873 * mono_add_joinable_thread:
4875 * Add TID to the list of joinable threads.
4876 * LOCKING: Acquires the threads lock.
4879 mono_threads_add_joinable_thread (gpointer tid)
4883 * We cannot detach from threads because it causes problems like
4884 * 2fd16f60/r114307. So we collect them and join them when
4885 * we have time (in he finalizer thread).
4887 joinable_threads_lock ();
4888 if (!joinable_threads)
4889 joinable_threads = g_hash_table_new (NULL, NULL);
4890 g_hash_table_insert (joinable_threads, tid, tid);
4891 joinable_thread_count ++;
4892 joinable_threads_unlock ();
4894 mono_gc_finalize_notify ();
4899 * mono_threads_join_threads:
4901 * Join all joinable threads. This is called from the finalizer thread.
4902 * LOCKING: Acquires the threads lock.
4905 mono_threads_join_threads (void)
4908 GHashTableIter iter;
4915 if (!joinable_thread_count)
4919 joinable_threads_lock ();
4921 if (g_hash_table_size (joinable_threads)) {
4922 g_hash_table_iter_init (&iter, joinable_threads);
4923 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4924 thread = (pthread_t)tid;
4925 g_hash_table_remove (joinable_threads, key);
4926 joinable_thread_count --;
4929 joinable_threads_unlock ();
4931 if (thread != pthread_self ())
4932 /* This shouldn't block */
4933 pthread_join (thread, NULL);
4944 * Wait for thread TID to exit.
4945 * LOCKING: Acquires the threads lock.
4948 mono_thread_join (gpointer tid)
4952 gboolean found = FALSE;
4954 joinable_threads_lock ();
4955 if (!joinable_threads)
4956 joinable_threads = g_hash_table_new (NULL, NULL);
4957 if (g_hash_table_lookup (joinable_threads, tid)) {
4958 g_hash_table_remove (joinable_threads, tid);
4959 joinable_thread_count --;
4962 joinable_threads_unlock ();
4965 thread = (pthread_t)tid;
4966 pthread_join (thread, NULL);
4971 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4973 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4974 mono_thread_interruption_checkpoint ();
4977 static inline gboolean
4978 is_appdomainunloaded_exception (MonoClass *klass)
4980 return klass == mono_class_get_appdomain_unloaded_exception_class ();
4983 static inline gboolean
4984 is_threadabort_exception (MonoClass *klass)
4986 return klass == mono_defaults.threadabortexception_class;
4990 mono_thread_internal_unhandled_exception (MonoObject* exc)
4992 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4993 MonoClass *klass = exc->vtable->klass;
4994 if (is_threadabort_exception (klass)) {
4995 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4996 } else if (!is_appdomainunloaded_exception (klass)) {
4997 mono_unhandled_exception (exc);
4998 if (mono_environment_exitcode_get () == 1)
5005 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5007 mono_threads_get_thread_dump (out_threads, out_stack_traces);