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 mono_profiler_thread_end (thread->tid);
459 if (thread == mono_thread_internal_current ()) {
461 * This will signal async signal handlers that the thread has exited.
462 * The profiler callback needs this to be set, so it cannot be done earlier.
464 mono_domain_unset ();
465 mono_memory_barrier ();
468 if (thread == mono_thread_internal_current ())
469 mono_thread_pop_appdomain_ref ();
471 thread->cached_culture_info = NULL;
473 mono_free_static_data (thread->static_data);
474 thread->static_data = NULL;
475 ref_stack_destroy (thread->appdomain_refs);
476 thread->appdomain_refs = NULL;
478 if (mono_thread_cleanup_fn)
479 mono_thread_cleanup_fn (thread_get_tid (thread));
481 if (mono_gc_is_moving ()) {
482 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
483 thread->thread_pinning_ref = NULL;
489 * A special static data offset (guint32) consists of 3 parts:
491 * [0] 6-bit index into the array of chunks.
492 * [6] 25-bit offset into the array.
493 * [31] Bit indicating thread or context static.
498 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
509 } SpecialStaticOffset;
511 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
512 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
514 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
515 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
516 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
517 (((SpecialStaticOffset *) &(x))->fields.f)
520 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
522 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
524 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
525 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
527 return ((char *) thread->static_data [idx]) + off;
531 get_context_static_data (MonoAppContext *ctx, guint32 offset)
533 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
535 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
536 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
538 return ((char *) ctx->static_data [idx]) + off;
542 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
544 static MonoClassField *current_thread_field = NULL;
548 if (!current_thread_field) {
549 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
550 g_assert (current_thread_field);
553 mono_class_vtable (domain, mono_defaults.thread_class);
554 mono_domain_lock (domain);
555 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
556 mono_domain_unlock (domain);
559 return (MonoThread **)get_thread_static_data (thread, offset);
563 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
565 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
567 g_assert (current->obj.vtable->domain == domain);
569 g_assert (!*current_thread_ptr);
570 *current_thread_ptr = current;
574 create_thread_object (MonoDomain *domain, MonoError *error)
576 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
577 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
582 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
586 thread = create_thread_object (domain, error);
587 if (!mono_error_ok (error))
590 MONO_OBJECT_SETREF (thread, internal_thread, internal);
595 static MonoInternalThread*
596 create_internal_thread (MonoError *error)
598 MonoInternalThread *thread;
601 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
602 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
603 if (!mono_error_ok (error))
606 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
607 mono_coop_mutex_init_recursive (thread->synch_cs);
609 thread->apartment_state = ThreadApartmentState_Unknown;
610 thread->managed_id = get_next_managed_thread_id ();
611 if (mono_gc_is_moving ()) {
612 thread->thread_pinning_ref = thread;
613 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
620 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
623 MonoDomain *domain = mono_get_root_domain ();
625 if (!candidate || candidate->obj.vtable->domain != domain) {
626 candidate = new_thread_with_internal (domain, thread, &error);
627 mono_error_raise_exception (&error); /* FIXME don't raise here */
629 set_current_thread_for_domain (domain, thread, candidate);
630 g_assert (!thread->root_domain_thread);
631 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
634 static guint32 WINAPI start_wrapper_internal(void *data)
636 MonoThreadInfo *info;
637 StartInfo *start_info = (StartInfo *)data;
638 guint32 (*start_func)(void *);
642 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
645 MonoInternalThread *internal = start_info->obj->internal_thread;
646 MonoObject *start_delegate = start_info->delegate;
647 MonoDomain *domain = start_info->obj->obj.vtable->domain;
649 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
651 /* We can be sure start_info->obj->tid and
652 * start_info->obj->handle have been set, because the thread
653 * was created suspended, and these values were set before the
657 info = mono_thread_info_current ();
659 internal->thread_info = info;
660 internal->small_id = info->small_id;
664 SET_CURRENT_OBJECT (internal);
666 /* Every thread references the appdomain which created it */
667 mono_thread_push_appdomain_ref (domain);
669 if (!mono_domain_set (domain, FALSE)) {
670 /* No point in raising an appdomain_unloaded exception here */
671 /* FIXME: Cleanup here */
672 mono_thread_pop_appdomain_ref ();
676 start_func = start_info->func;
677 start_arg = start_info->obj->start_obj;
679 start_arg = start_info->start_arg;
681 /* We have to do this here because mono_thread_new_init()
682 requires that root_domain_thread is set up. */
683 thread_adjust_static_data (internal);
684 init_root_domain_thread (internal, start_info->obj);
686 /* This MUST be called before any managed code can be
687 * executed, as it calls the callback function that (for the
688 * jit) sets the lmf marker.
690 mono_thread_new_init (tid, &tid, start_func);
691 internal->stack_ptr = &tid;
692 if (domain != mono_get_root_domain ())
693 set_current_thread_for_domain (domain, internal, start_info->obj);
695 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
697 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
699 /* On 2.0 profile (and higher), set explicitly since state might have been
701 if (internal->apartment_state == ThreadApartmentState_Unknown)
702 internal->apartment_state = ThreadApartmentState_MTA;
704 mono_thread_init_apartment_state ();
706 if(internal->start_notify!=NULL) {
707 /* Let the thread that called Start() know we're
710 ReleaseSemaphore (internal->start_notify, 1, NULL);
714 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
718 * Call this after calling start_notify, since the profiler callback might want
719 * to lock the thread, and the lock is held by thread_start () which waits for
722 mono_profiler_thread_start (tid);
724 /* if the name was set before starting, we didn't invoke the profiler callback */
725 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
726 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
727 mono_profiler_thread_name (internal->tid, tname);
730 /* start_func is set only for unmanaged start functions */
732 start_func (start_arg);
735 g_assert (start_delegate != NULL);
736 args [0] = start_arg;
737 /* we may want to handle the exception here. See comment below on unhandled exceptions */
738 mono_runtime_delegate_invoke (start_delegate, args, NULL);
741 /* If the thread calls ExitThread at all, this remaining code
742 * will not be executed, but the main thread will eventually
743 * call thread_cleanup() on this thread's behalf.
746 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
748 /* Do any cleanup needed for apartment state. This
749 * cannot be done in thread_cleanup since thread_cleanup could be
750 * called for a thread other than the current thread.
751 * mono_thread_cleanup_apartment_state cleans up apartment
752 * for the current thead */
753 mono_thread_cleanup_apartment_state ();
755 thread_cleanup (internal);
759 /* Remove the reference to the thread object in the TLS data,
760 * so the thread object can be finalized. This won't be
761 * reached if the thread threw an uncaught exception, so those
762 * thread handles will stay referenced :-( (This is due to
763 * missing support for scanning thread-specific data in the
764 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
767 SET_CURRENT_OBJECT (NULL);
772 static guint32 WINAPI start_wrapper(void *data)
776 /* Avoid scanning the frames above this frame during a GC */
777 mono_gc_set_stack_end ((void*)&dummy);
779 return start_wrapper_internal (data);
785 * Common thread creation code.
786 * LOCKING: Acquires the threads lock.
789 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
790 gboolean throw_on_failure)
792 HANDLE thread_handle;
793 MonoNativeThreadId tid;
794 guint32 create_flags;
797 * Join joinable threads to prevent running out of threads since the finalizer
798 * thread might be blocked/backlogged.
800 mono_threads_join_threads ();
802 mono_threads_lock ();
805 mono_threads_unlock ();
808 if (threads_starting_up == NULL) {
809 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
810 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
812 mono_g_hash_table_insert (threads_starting_up, thread, thread);
813 mono_threads_unlock ();
815 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
816 if (!internal->start_notify) {
817 mono_threads_lock ();
818 mono_g_hash_table_remove (threads_starting_up, thread);
819 mono_threads_unlock ();
820 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
826 stack_size = default_stacksize_for_thread (internal);
828 /* Create suspended, so we can do some housekeeping before the thread
831 create_flags = CREATE_SUSPENDED;
833 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
834 stack_size, create_flags, &tid);
836 if (thread_handle == NULL) {
837 /* The thread couldn't be created, so throw an exception */
838 mono_threads_lock ();
839 mono_g_hash_table_remove (threads_starting_up, thread);
840 mono_threads_unlock ();
842 if (throw_on_failure)
843 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
845 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
848 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
850 internal->handle = thread_handle;
851 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
853 internal->threadpool_thread = threadpool_thread;
854 if (threadpool_thread)
855 mono_thread_set_state (internal, ThreadState_Background);
857 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
859 /* Only store the handle when the thread is about to be
860 * launched, to avoid the main thread deadlocking while trying
861 * to clean up a thread that will never be signalled.
863 if (!handle_store (thread, FALSE))
866 mono_thread_info_resume (tid);
868 if (internal->start_notify) {
870 * Wait for the thread to set up its TLS data etc, so
871 * theres no potential race condition if someone tries
872 * to look up the data believing the thread has
875 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));
877 MONO_PREPARE_BLOCKING;
878 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
879 MONO_FINISH_BLOCKING;
881 CloseHandle (internal->start_notify);
882 internal->start_notify = NULL;
885 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));
890 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
892 if (mono_thread_start_cb) {
893 mono_thread_start_cb (tid, stack_start, func);
897 void mono_threads_set_default_stacksize (guint32 stacksize)
899 default_stacksize = stacksize;
902 guint32 mono_threads_get_default_stacksize (void)
904 return default_stacksize;
908 * mono_thread_create_internal:
910 * ARG should not be a GC reference.
913 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
917 MonoInternalThread *internal;
918 StartInfo *start_info;
921 thread = create_thread_object (domain, &error);
922 mono_error_raise_exception (&error); /* FIXME don't raise here */
924 internal = create_internal_thread (&error);
925 mono_error_raise_exception (&error); /* FIXME don't raise here */
927 MONO_OBJECT_SETREF (thread, internal_thread, internal);
929 start_info = g_new0 (StartInfo, 1);
930 start_info->func = (guint32 (*)(void *))func;
931 start_info->obj = thread;
932 start_info->start_arg = arg;
934 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
938 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
939 #ifndef MONO_CROSS_COMPILE
940 if (mono_check_corlib_version () == NULL)
941 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
948 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
950 mono_thread_create_internal (domain, func, arg, FALSE, 0);
954 mono_thread_attach (MonoDomain *domain)
957 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
958 mono_error_raise_exception (&error);
964 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
966 MonoThreadInfo *info;
967 MonoInternalThread *thread;
968 MonoThread *current_thread;
969 HANDLE thread_handle;
970 MonoNativeThreadId tid;
972 mono_error_init (error);
974 if ((thread = mono_thread_internal_current ())) {
975 if (domain != mono_domain_get ())
976 mono_domain_set (domain, TRUE);
977 /* Already attached */
978 return mono_thread_current ();
981 if (!mono_gc_register_thread (&domain)) {
982 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 ());
985 thread = create_internal_thread (error);
986 if (!mono_error_ok (error))
989 thread_handle = mono_thread_info_open_handle ();
990 g_assert (thread_handle);
992 tid=mono_native_thread_id_get ();
994 thread->handle = thread_handle;
995 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
996 thread->stack_ptr = &tid;
998 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1000 info = mono_thread_info_current ();
1002 thread->thread_info = info;
1003 thread->small_id = info->small_id;
1005 current_thread = new_thread_with_internal (domain, thread, error);
1006 if (!mono_error_ok (error))
1009 if (!handle_store (current_thread, force_attach)) {
1010 /* Mono is shutting down, so just wait for the end */
1012 mono_thread_info_sleep (10000, NULL);
1015 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1017 SET_CURRENT_OBJECT (thread);
1018 mono_domain_set (domain, TRUE);
1020 thread_adjust_static_data (thread);
1022 init_root_domain_thread (thread, current_thread);
1023 if (domain != mono_get_root_domain ())
1024 set_current_thread_for_domain (domain, thread, current_thread);
1027 if (mono_thread_attach_cb) {
1031 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1034 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1036 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1039 // FIXME: Need a separate callback
1040 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1042 return current_thread;
1046 mono_thread_detach_internal (MonoInternalThread *thread)
1048 g_return_if_fail (thread != NULL);
1050 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1052 thread_cleanup (thread);
1054 SET_CURRENT_OBJECT (NULL);
1055 mono_domain_unset ();
1057 /* Don't need to CloseHandle this thread, even though we took a
1058 * reference in mono_thread_attach (), because the GC will do it
1059 * when the Thread object is finalised.
1064 mono_thread_detach (MonoThread *thread)
1067 mono_thread_detach_internal (thread->internal_thread);
1071 * mono_thread_detach_if_exiting:
1073 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1074 * This should be used at the end of embedding code which calls into managed code, and which
1075 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1078 mono_thread_detach_if_exiting (void)
1080 if (mono_thread_info_is_exiting ()) {
1081 MonoInternalThread *thread;
1083 thread = mono_thread_internal_current ();
1085 mono_thread_detach_internal (thread);
1086 mono_thread_info_detach ();
1094 MonoInternalThread *thread = mono_thread_internal_current ();
1096 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1098 thread_cleanup (thread);
1099 SET_CURRENT_OBJECT (NULL);
1100 mono_domain_unset ();
1102 /* we could add a callback here for embedders to use. */
1103 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1104 exit (mono_environment_exitcode_get ());
1105 mono_thread_info_exit ();
1109 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1112 MonoInternalThread *internal;
1114 internal = create_internal_thread (&error);
1115 mono_error_raise_exception (&error);
1117 internal->state = ThreadState_Unstarted;
1119 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1123 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1126 StartInfo *start_info;
1127 MonoInternalThread *internal;
1130 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1132 if (!this_obj->internal_thread)
1133 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1134 internal = this_obj->internal_thread;
1136 LOCK_THREAD (internal);
1138 if ((internal->state & ThreadState_Unstarted) == 0) {
1139 UNLOCK_THREAD (internal);
1140 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1144 if ((internal->state & ThreadState_Aborted) != 0) {
1145 UNLOCK_THREAD (internal);
1148 /* This is freed in start_wrapper */
1149 start_info = g_new0 (StartInfo, 1);
1150 start_info->func = NULL;
1151 start_info->start_arg = NULL;
1152 start_info->delegate = start;
1153 start_info->obj = this_obj;
1154 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1156 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1158 UNLOCK_THREAD (internal);
1162 internal->state &= ~ThreadState_Unstarted;
1164 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1166 UNLOCK_THREAD (internal);
1167 return internal->handle;
1171 * This is called from the finalizer of the internal thread object.
1174 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1176 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1179 * Since threads keep a reference to their thread object while running, by the time this function is called,
1180 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1181 * when thread_cleanup () can be called after this.
1184 CloseHandle (thread);
1186 if (this_obj->synch_cs) {
1187 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1188 this_obj->synch_cs = NULL;
1189 mono_coop_mutex_destroy (synch_cs);
1193 if (this_obj->name) {
1194 void *name = this_obj->name;
1195 this_obj->name = NULL;
1201 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1204 MonoInternalThread *thread = mono_thread_internal_current ();
1206 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1208 mono_thread_current_check_pending_interrupt ();
1211 gboolean alerted = FALSE;
1213 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1215 res = mono_thread_info_sleep (ms, &alerted);
1217 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1220 MonoException* exc = mono_thread_execute_interruption ();
1222 mono_raise_exception (exc);
1234 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1239 ves_icall_System_Threading_Thread_GetDomainID (void)
1241 return mono_domain_get()->domain_id;
1245 ves_icall_System_Threading_Thread_Yield (void)
1247 return mono_thread_info_yield ();
1251 * mono_thread_get_name:
1253 * Return the name of the thread. NAME_LEN is set to the length of the name.
1254 * Return NULL if the thread has no name. The returned memory is owned by the
1258 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1262 LOCK_THREAD (this_obj);
1264 if (!this_obj->name) {
1268 *name_len = this_obj->name_len;
1269 res = g_new (gunichar2, this_obj->name_len);
1270 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1273 UNLOCK_THREAD (this_obj);
1279 * mono_thread_get_name_utf8:
1281 * Return the name of the thread in UTF-8.
1282 * Return NULL if the thread has no name.
1283 * The returned memory is owned by the caller.
1286 mono_thread_get_name_utf8 (MonoThread *thread)
1291 MonoInternalThread *internal = thread->internal_thread;
1292 if (internal == NULL)
1295 LOCK_THREAD (internal);
1297 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1299 UNLOCK_THREAD (internal);
1305 * mono_thread_get_managed_id:
1307 * Return the Thread.ManagedThreadId value of `thread`.
1308 * Returns -1 if `thread` is NULL.
1311 mono_thread_get_managed_id (MonoThread *thread)
1316 MonoInternalThread *internal = thread->internal_thread;
1317 if (internal == NULL)
1320 int32_t id = internal->managed_id;
1326 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1331 mono_error_init (&error);
1333 LOCK_THREAD (this_obj);
1335 if (!this_obj->name)
1338 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1340 UNLOCK_THREAD (this_obj);
1342 mono_error_raise_exception (&error);
1348 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1350 LOCK_THREAD (this_obj);
1352 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1353 UNLOCK_THREAD (this_obj);
1355 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1358 if (this_obj->name) {
1359 g_free (this_obj->name);
1360 this_obj->name_len = 0;
1363 this_obj->name = g_new (gunichar2, mono_string_length (name));
1364 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1365 this_obj->name_len = mono_string_length (name);
1368 this_obj->name = NULL;
1371 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1373 UNLOCK_THREAD (this_obj);
1375 if (this_obj->name && this_obj->tid) {
1376 char *tname = mono_string_to_utf8 (name);
1377 mono_profiler_thread_name (this_obj->tid, tname);
1378 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1384 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1386 mono_thread_set_name_internal (this_obj, name, TRUE);
1390 * ves_icall_System_Threading_Thread_GetPriority_internal:
1391 * @param this_obj: The MonoInternalThread on which to operate.
1393 * Gets the priority of the given thread.
1394 * @return: The priority of the given thread.
1397 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1400 MonoInternalThread *internal = this_obj->internal_thread;
1402 LOCK_THREAD (internal);
1403 priority = GetThreadPriority (internal->handle) + 2;
1404 UNLOCK_THREAD (internal);
1409 * ves_icall_System_Threading_Thread_SetPriority_internal:
1410 * @param this_obj: The MonoInternalThread on which to operate.
1411 * @param priority: The priority to set.
1413 * Sets the priority of the given thread.
1416 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1418 MonoInternalThread *internal = this_obj->internal_thread;
1420 LOCK_THREAD (internal);
1421 SetThreadPriority (internal->handle, priority - 2);
1422 UNLOCK_THREAD (internal);
1425 /* If the array is already in the requested domain, we just return it,
1426 otherwise we return a copy in that domain. */
1428 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1435 if (mono_object_domain (arr) == domain)
1438 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1439 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1444 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1446 return byte_array_to_domain (arr, mono_get_root_domain ());
1450 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1452 return byte_array_to_domain (arr, mono_domain_get ());
1456 mono_thread_current (void)
1459 MonoDomain *domain = mono_domain_get ();
1460 MonoInternalThread *internal = mono_thread_internal_current ();
1461 MonoThread **current_thread_ptr;
1463 g_assert (internal);
1464 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1466 if (!*current_thread_ptr) {
1467 g_assert (domain != mono_get_root_domain ());
1468 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1469 mono_error_raise_exception (&error); /* FIXME don't raise here */
1471 return *current_thread_ptr;
1474 /* Return the thread object belonging to INTERNAL in the current domain */
1476 mono_thread_current_for_thread (MonoInternalThread *internal)
1479 MonoDomain *domain = mono_domain_get ();
1480 MonoThread **current_thread_ptr;
1482 g_assert (internal);
1483 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1485 if (!*current_thread_ptr) {
1486 g_assert (domain != mono_get_root_domain ());
1487 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1488 mono_error_raise_exception (&error); /* FIXME don't raise here */
1490 return *current_thread_ptr;
1494 mono_thread_internal_current (void)
1496 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1497 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1502 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1504 MonoInternalThread *thread = this_obj->internal_thread;
1505 HANDLE handle = thread->handle;
1506 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1509 mono_thread_current_check_pending_interrupt ();
1511 LOCK_THREAD (thread);
1513 if ((thread->state & ThreadState_Unstarted) != 0) {
1514 UNLOCK_THREAD (thread);
1516 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1520 UNLOCK_THREAD (thread);
1525 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1527 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1529 MONO_PREPARE_BLOCKING;
1530 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1531 MONO_FINISH_BLOCKING;
1533 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1535 if(ret==WAIT_OBJECT_0) {
1536 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1541 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1547 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1555 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1557 MONO_PREPARE_BLOCKING;
1559 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1561 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1562 MONO_FINISH_BLOCKING;
1564 if (ret != WAIT_IO_COMPLETION)
1567 exc = mono_thread_execute_interruption ();
1569 mono_raise_exception (exc);
1574 /* Re-calculate ms according to the time passed */
1575 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1576 if (diff_ms >= ms) {
1580 wait = ms - diff_ms;
1586 /* FIXME: exitContext isnt documented */
1587 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1593 MonoObject *waitHandle;
1594 MonoInternalThread *thread = mono_thread_internal_current ();
1596 /* Do this WaitSleepJoin check before creating objects */
1597 mono_thread_current_check_pending_interrupt ();
1599 /* We fail in managed if the array has more than 64 elements */
1600 numhandles = (guint32)mono_array_length(mono_handles);
1601 handles = g_new0(HANDLE, numhandles);
1603 for(i = 0; i < numhandles; i++) {
1604 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1605 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1612 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1614 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1616 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1623 /* FIXME: exitContext isnt documented */
1624 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1626 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1627 uintptr_t numhandles;
1630 MonoObject *waitHandle;
1631 MonoInternalThread *thread = mono_thread_internal_current ();
1633 /* Do this WaitSleepJoin check before creating objects */
1634 mono_thread_current_check_pending_interrupt ();
1636 numhandles = mono_array_length(mono_handles);
1637 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1640 for(i = 0; i < numhandles; i++) {
1641 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1642 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1649 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1651 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1653 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1655 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1658 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1660 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1661 return ret - WAIT_OBJECT_0;
1663 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1664 return ret - WAIT_ABANDONED_0;
1671 /* FIXME: exitContext isnt documented */
1672 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms, gboolean exitContext)
1675 MonoInternalThread *thread = mono_thread_internal_current ();
1677 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1683 mono_thread_current_check_pending_interrupt ();
1685 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1687 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1689 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1695 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1698 MonoInternalThread *thread = mono_thread_internal_current ();
1703 mono_thread_current_check_pending_interrupt ();
1705 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1707 MONO_PREPARE_BLOCKING;
1708 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1709 MONO_FINISH_BLOCKING;
1711 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1716 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1723 mutex = CreateMutex (NULL, owned, NULL);
1725 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1727 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1735 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1736 return(ReleaseMutex (handle));
1739 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1745 *error = ERROR_SUCCESS;
1747 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1749 *error = GetLastError ();
1756 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1763 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1765 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1766 mono_string_chars (name));
1768 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1776 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1780 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1785 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1789 *error = ERROR_SUCCESS;
1791 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1793 *error = GetLastError ();
1799 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1806 event = CreateEvent (NULL, manual, initial, NULL);
1808 event = CreateEvent (NULL, manual, initial,
1809 mono_string_chars (name));
1811 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1819 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1820 return (SetEvent(handle));
1823 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1824 return (ResetEvent(handle));
1828 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1829 CloseHandle (handle);
1832 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1838 *error = ERROR_SUCCESS;
1840 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1842 *error = GetLastError ();
1848 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1850 return InterlockedIncrement (location);
1853 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1855 #if SIZEOF_VOID_P == 4
1856 if (G_UNLIKELY ((size_t)location & 0x7)) {
1858 mono_interlocked_lock ();
1861 mono_interlocked_unlock ();
1865 return InterlockedIncrement64 (location);
1868 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1870 return InterlockedDecrement(location);
1873 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1875 #if SIZEOF_VOID_P == 4
1876 if (G_UNLIKELY ((size_t)location & 0x7)) {
1878 mono_interlocked_lock ();
1881 mono_interlocked_unlock ();
1885 return InterlockedDecrement64 (location);
1888 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1890 return InterlockedExchange(location, value);
1893 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1896 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1897 mono_gc_wbarrier_generic_nostore (location);
1901 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1903 return InterlockedExchangePointer(location, value);
1906 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1908 IntFloatUnion val, ret;
1911 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1917 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1919 #if SIZEOF_VOID_P == 4
1920 if (G_UNLIKELY ((size_t)location & 0x7)) {
1922 mono_interlocked_lock ();
1925 mono_interlocked_unlock ();
1929 return InterlockedExchange64 (location, value);
1933 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1935 LongDoubleUnion val, ret;
1938 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1943 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1945 return InterlockedCompareExchange(location, value, comparand);
1948 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1950 gint32 r = InterlockedCompareExchange(location, value, comparand);
1951 *success = r == comparand;
1955 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1958 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1959 mono_gc_wbarrier_generic_nostore (location);
1963 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1965 return InterlockedCompareExchangePointer(location, value, comparand);
1968 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1970 IntFloatUnion val, ret, cmp;
1973 cmp.fval = comparand;
1974 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1980 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1982 #if SIZEOF_VOID_P == 8
1983 LongDoubleUnion val, comp, ret;
1986 comp.fval = comparand;
1987 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1993 mono_interlocked_lock ();
1995 if (old == comparand)
1997 mono_interlocked_unlock ();
2004 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2006 #if SIZEOF_VOID_P == 4
2007 if (G_UNLIKELY ((size_t)location & 0x7)) {
2009 mono_interlocked_lock ();
2011 if (old == comparand)
2013 mono_interlocked_unlock ();
2017 return InterlockedCompareExchange64 (location, value, comparand);
2021 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2024 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2025 mono_gc_wbarrier_generic_nostore (location);
2030 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2033 MONO_CHECK_NULL (location, NULL);
2034 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2035 mono_gc_wbarrier_generic_nostore (location);
2040 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2042 return InterlockedAdd (location, value);
2046 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2048 #if SIZEOF_VOID_P == 4
2049 if (G_UNLIKELY ((size_t)location & 0x7)) {
2051 mono_interlocked_lock ();
2054 mono_interlocked_unlock ();
2058 return InterlockedAdd64 (location, value);
2062 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2064 #if SIZEOF_VOID_P == 4
2065 if (G_UNLIKELY ((size_t)location & 0x7)) {
2067 mono_interlocked_lock ();
2069 mono_interlocked_unlock ();
2073 return InterlockedRead64 (location);
2077 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2079 mono_memory_barrier ();
2083 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2085 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2087 if (state & ThreadState_Background) {
2088 /* If the thread changes the background mode, the main thread has to
2089 * be notified, since it has to rebuild the list of threads to
2092 SetEvent (background_change_event);
2097 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2099 mono_thread_set_state (this_obj, (MonoThreadState)state);
2101 if (state & ThreadState_Background) {
2102 /* If the thread changes the background mode, the main thread has to
2103 * be notified, since it has to rebuild the list of threads to
2106 SetEvent (background_change_event);
2111 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2115 LOCK_THREAD (this_obj);
2117 state = this_obj->state;
2119 UNLOCK_THREAD (this_obj);
2124 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2126 MonoInternalThread *current;
2128 MonoInternalThread *thread = this_obj->internal_thread;
2130 LOCK_THREAD (thread);
2132 current = mono_thread_internal_current ();
2134 thread->thread_interrupt_requested = TRUE;
2135 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2137 UNLOCK_THREAD (thread);
2140 async_abort_internal (thread, FALSE);
2144 void mono_thread_current_check_pending_interrupt ()
2146 MonoInternalThread *thread = mono_thread_internal_current ();
2147 gboolean throw_ = FALSE;
2149 LOCK_THREAD (thread);
2151 if (thread->thread_interrupt_requested) {
2153 thread->thread_interrupt_requested = FALSE;
2156 UNLOCK_THREAD (thread);
2159 mono_raise_exception (mono_get_exception_thread_interrupted ());
2164 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2166 LOCK_THREAD (thread);
2168 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2169 (thread->state & ThreadState_StopRequested) != 0 ||
2170 (thread->state & ThreadState_Stopped) != 0)
2172 UNLOCK_THREAD (thread);
2176 if ((thread->state & ThreadState_Unstarted) != 0) {
2177 thread->state |= ThreadState_Aborted;
2178 UNLOCK_THREAD (thread);
2182 thread->state |= ThreadState_AbortRequested;
2183 if (thread->abort_state_handle)
2184 mono_gchandle_free (thread->abort_state_handle);
2186 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2187 g_assert (thread->abort_state_handle);
2189 thread->abort_state_handle = 0;
2191 thread->abort_exc = NULL;
2193 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));
2195 /* During shutdown, we can't wait for other threads */
2197 /* Make sure the thread is awake */
2198 mono_thread_resume (thread);
2200 UNLOCK_THREAD (thread);
2202 if (thread == mono_thread_internal_current ())
2203 self_abort_internal ();
2205 async_abort_internal (thread, TRUE);
2209 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2211 MonoInternalThread *thread = mono_thread_internal_current ();
2212 gboolean was_aborting;
2214 LOCK_THREAD (thread);
2215 was_aborting = thread->state & ThreadState_AbortRequested;
2216 thread->state &= ~ThreadState_AbortRequested;
2217 UNLOCK_THREAD (thread);
2219 if (!was_aborting) {
2220 const char *msg = "Unable to reset abort because no abort was requested";
2221 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2224 thread->abort_exc = NULL;
2225 if (thread->abort_state_handle) {
2226 mono_gchandle_free (thread->abort_state_handle);
2227 /* This is actually not necessary - the handle
2228 only counts if the exception is set */
2229 thread->abort_state_handle = 0;
2234 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2236 LOCK_THREAD (thread);
2238 thread->state &= ~ThreadState_AbortRequested;
2240 if (thread->abort_exc) {
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;
2250 UNLOCK_THREAD (thread);
2254 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2256 MonoInternalThread *thread = this_obj->internal_thread;
2257 MonoObject *state, *deserialized = NULL, *exc;
2260 if (!thread->abort_state_handle)
2263 state = mono_gchandle_get_target (thread->abort_state_handle);
2266 domain = mono_domain_get ();
2267 if (mono_object_domain (state) == domain)
2270 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2272 if (!deserialized) {
2273 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2275 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2276 mono_set_pending_exception (invalid_op_exc);
2280 return deserialized;
2284 mono_thread_suspend (MonoInternalThread *thread)
2286 LOCK_THREAD (thread);
2288 if ((thread->state & ThreadState_Unstarted) != 0 ||
2289 (thread->state & ThreadState_Aborted) != 0 ||
2290 (thread->state & ThreadState_Stopped) != 0)
2292 UNLOCK_THREAD (thread);
2296 if ((thread->state & ThreadState_Suspended) != 0 ||
2297 (thread->state & ThreadState_SuspendRequested) != 0 ||
2298 (thread->state & ThreadState_StopRequested) != 0)
2300 UNLOCK_THREAD (thread);
2304 thread->state |= ThreadState_SuspendRequested;
2306 if (thread == mono_thread_internal_current ()) {
2307 /* calls UNLOCK_THREAD (thread) */
2308 self_suspend_internal ();
2310 /* calls UNLOCK_THREAD (thread) */
2311 async_suspend_internal (thread, FALSE);
2318 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2320 if (!mono_thread_suspend (this_obj->internal_thread)) {
2321 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2326 /* LOCKING: LOCK_THREAD(thread) must be held */
2328 mono_thread_resume (MonoInternalThread *thread)
2330 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2331 thread->state &= ~ThreadState_SuspendRequested;
2335 if ((thread->state & ThreadState_Suspended) == 0 ||
2336 (thread->state & ThreadState_Unstarted) != 0 ||
2337 (thread->state & ThreadState_Aborted) != 0 ||
2338 (thread->state & ThreadState_Stopped) != 0)
2343 UNLOCK_THREAD (thread);
2345 /* Awake the thread */
2346 if (!mono_thread_info_resume (thread_get_tid (thread)))
2349 LOCK_THREAD (thread);
2351 thread->state &= ~ThreadState_Suspended;
2357 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2359 if (!thread->internal_thread) {
2360 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2362 LOCK_THREAD (thread->internal_thread);
2363 if (!mono_thread_resume (thread->internal_thread))
2364 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2365 UNLOCK_THREAD (thread->internal_thread);
2370 mono_threads_is_critical_method (MonoMethod *method)
2372 switch (method->wrapper_type) {
2373 case MONO_WRAPPER_RUNTIME_INVOKE:
2374 case MONO_WRAPPER_XDOMAIN_INVOKE:
2375 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2382 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2387 if (mono_threads_is_critical_method (m)) {
2388 *((gboolean*)data) = TRUE;
2395 is_running_protected_wrapper (void)
2397 gboolean found = FALSE;
2398 mono_stack_walk (find_wrapper, &found);
2402 void mono_thread_internal_stop (MonoInternalThread *thread)
2404 LOCK_THREAD (thread);
2406 if ((thread->state & ThreadState_StopRequested) != 0 ||
2407 (thread->state & ThreadState_Stopped) != 0)
2409 UNLOCK_THREAD (thread);
2413 /* Make sure the thread is awake */
2414 mono_thread_resume (thread);
2416 thread->state |= ThreadState_StopRequested;
2417 thread->state &= ~ThreadState_AbortRequested;
2419 UNLOCK_THREAD (thread);
2421 if (thread == mono_thread_internal_current ())
2422 self_abort_internal ();
2424 async_abort_internal (thread, TRUE);
2427 void mono_thread_stop (MonoThread *thread)
2429 mono_thread_internal_stop (thread->internal_thread);
2433 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2435 gint8 tmp = *(volatile gint8 *)ptr;
2436 mono_memory_barrier ();
2441 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2443 gint16 tmp = *(volatile gint16 *)ptr;
2444 mono_memory_barrier ();
2449 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2451 gint32 tmp = *(volatile gint32 *)ptr;
2452 mono_memory_barrier ();
2457 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2459 gint64 tmp = *(volatile gint64 *)ptr;
2460 mono_memory_barrier ();
2465 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2467 volatile void *tmp = *(volatile void **)ptr;
2468 mono_memory_barrier ();
2469 return (void *) tmp;
2473 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2475 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2476 mono_memory_barrier ();
2477 return (MonoObject *) tmp;
2481 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2483 double tmp = *(volatile double *)ptr;
2484 mono_memory_barrier ();
2489 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2491 float tmp = *(volatile float *)ptr;
2492 mono_memory_barrier ();
2497 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2499 return InterlockedRead8 ((volatile gint8 *)ptr);
2503 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2505 return InterlockedRead16 ((volatile gint16 *)ptr);
2509 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2511 return InterlockedRead ((volatile gint32 *)ptr);
2515 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2517 #if SIZEOF_VOID_P == 4
2518 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2520 mono_interlocked_lock ();
2521 val = *(gint64*)ptr;
2522 mono_interlocked_unlock ();
2526 return InterlockedRead64 ((volatile gint64 *)ptr);
2530 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2532 return InterlockedReadPointer ((volatile gpointer *)ptr);
2536 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2540 #if SIZEOF_VOID_P == 4
2541 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2543 mono_interlocked_lock ();
2544 val = *(double*)ptr;
2545 mono_interlocked_unlock ();
2550 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2556 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2560 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2566 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2568 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2572 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2574 mono_memory_barrier ();
2575 *(volatile gint8 *)ptr = value;
2579 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2581 mono_memory_barrier ();
2582 *(volatile gint16 *)ptr = value;
2586 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2588 mono_memory_barrier ();
2589 *(volatile gint32 *)ptr = value;
2593 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2595 mono_memory_barrier ();
2596 *(volatile gint64 *)ptr = value;
2600 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2602 mono_memory_barrier ();
2603 *(volatile void **)ptr = value;
2607 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2609 mono_memory_barrier ();
2610 mono_gc_wbarrier_generic_store (ptr, value);
2614 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2616 mono_memory_barrier ();
2617 *(volatile double *)ptr = value;
2621 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2623 mono_memory_barrier ();
2624 *(volatile float *)ptr = value;
2628 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2630 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2634 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2636 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2640 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2642 InterlockedWrite ((volatile gint32 *)ptr, value);
2646 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2648 #if SIZEOF_VOID_P == 4
2649 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2650 mono_interlocked_lock ();
2651 *(gint64*)ptr = value;
2652 mono_interlocked_unlock ();
2657 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2661 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2663 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2667 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2671 #if SIZEOF_VOID_P == 4
2672 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2673 mono_interlocked_lock ();
2674 *(double*)ptr = value;
2675 mono_interlocked_unlock ();
2682 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2686 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2692 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2696 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2698 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2702 free_context (void *user_data)
2704 ContextStaticData *data = user_data;
2706 mono_threads_lock ();
2709 * There is no guarantee that, by the point this reference queue callback
2710 * has been invoked, the GC handle associated with the object will fail to
2711 * resolve as one might expect. So if we don't free and remove the GC
2712 * handle here, free_context_static_data_helper () could end up resolving
2713 * a GC handle to an actually-dead context which would contain a pointer
2714 * to an already-freed static data segment, resulting in a crash when
2717 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2719 mono_threads_unlock ();
2721 mono_gchandle_free (data->gc_handle);
2722 mono_free_static_data (data->static_data);
2727 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2729 mono_threads_lock ();
2731 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2734 contexts = g_hash_table_new (NULL, NULL);
2737 context_queue = mono_gc_reference_queue_new (free_context);
2739 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2740 g_hash_table_insert (contexts, gch, gch);
2743 * We use this intermediate structure to contain a duplicate pointer to
2744 * the static data because we can't rely on being able to resolve the GC
2745 * handle in the reference queue callback.
2747 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2748 data->gc_handle = GPOINTER_TO_UINT (gch);
2751 context_adjust_static_data (ctx);
2752 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2754 mono_threads_unlock ();
2756 mono_profiler_context_loaded (ctx);
2760 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2763 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2764 * cleanup in exceptional circumstances, we don't actually do any
2765 * cleanup work here. We instead do this via a reference queue.
2768 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2770 mono_profiler_context_unloaded (ctx);
2774 mono_thread_init_tls (void)
2776 MONO_FAST_TLS_INIT (tls_current_object);
2777 mono_native_tls_alloc (¤t_object_key, NULL);
2780 void mono_thread_init (MonoThreadStartCB start_cb,
2781 MonoThreadAttachCB attach_cb)
2783 mono_coop_mutex_init_recursive (&threads_mutex);
2785 mono_os_mutex_init_recursive(&interlocked_mutex);
2786 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2788 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2789 g_assert(background_change_event != NULL);
2791 mono_init_static_data_info (&thread_static_info);
2792 mono_init_static_data_info (&context_static_info);
2794 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2796 mono_thread_start_cb = start_cb;
2797 mono_thread_attach_cb = attach_cb;
2799 /* Get a pseudo handle to the current process. This is just a
2800 * kludge so that wapi can build a process handle if needed.
2801 * As a pseudo handle is returned, we don't need to clean
2804 GetCurrentProcess ();
2807 void mono_thread_cleanup (void)
2809 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2810 MonoThreadInfo *info;
2812 /* The main thread must abandon any held mutexes (particularly
2813 * important for named mutexes as they are shared across
2814 * processes, see bug 74680.) This will happen when the
2815 * thread exits, but if it's not running in a subthread it
2816 * won't exit in time.
2818 info = mono_thread_info_current ();
2819 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2823 /* This stuff needs more testing, it seems one of these
2824 * critical sections can be locked when mono_thread_cleanup is
2827 mono_coop_mutex_destroy (&threads_mutex);
2828 mono_os_mutex_destroy (&interlocked_mutex);
2829 mono_os_mutex_destroy (&delayed_free_table_mutex);
2830 mono_os_mutex_destroy (&small_id_mutex);
2831 CloseHandle (background_change_event);
2834 mono_native_tls_free (current_object_key);
2838 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2840 mono_thread_cleanup_fn = func;
2844 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2846 thread->internal_thread->manage_callback = func;
2850 static void print_tids (gpointer key, gpointer value, gpointer user)
2852 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2853 * sizeof(uint) and a cast to uint would overflow
2855 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2856 * print this as a pointer.
2858 g_message ("Waiting for: %p", key);
2863 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2864 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2868 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2872 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2874 MONO_PREPARE_BLOCKING;
2875 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2876 MONO_FINISH_BLOCKING;
2878 if(ret==WAIT_FAILED) {
2879 /* See the comment in build_wait_tids() */
2880 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2884 for(i=0; i<wait->num; i++)
2885 CloseHandle (wait->handles[i]);
2887 if (ret == WAIT_TIMEOUT)
2890 for(i=0; i<wait->num; i++) {
2891 gsize tid = wait->threads[i]->tid;
2894 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2895 * it can still run io-layer etc. code. So wait for it to really exit.
2896 * FIXME: This won't join threads which are not in the joinable_hash yet.
2898 mono_thread_join ((gpointer)tid);
2900 mono_threads_lock ();
2901 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2902 /* This thread must have been killed, because
2903 * it hasn't cleaned itself up. (It's just
2904 * possible that the thread exited before the
2905 * parent thread had a chance to store the
2906 * handle, and now there is another pointer to
2907 * the already-exited thread stored. In this
2908 * case, we'll just get two
2909 * mono_profiler_thread_end() calls for the
2913 mono_threads_unlock ();
2914 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2915 thread_cleanup (wait->threads[i]);
2917 mono_threads_unlock ();
2922 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2924 guint32 i, ret, count;
2926 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2928 /* Add the thread state change event, so it wakes up if a thread changes
2929 * to background mode.
2932 if (count < MAXIMUM_WAIT_OBJECTS) {
2933 wait->handles [count] = background_change_event;
2937 MONO_PREPARE_BLOCKING;
2938 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2939 MONO_FINISH_BLOCKING;
2941 if(ret==WAIT_FAILED) {
2942 /* See the comment in build_wait_tids() */
2943 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2947 for(i=0; i<wait->num; i++)
2948 CloseHandle (wait->handles[i]);
2950 if (ret == WAIT_TIMEOUT)
2953 if (ret < wait->num) {
2954 gsize tid = wait->threads[ret]->tid;
2955 mono_threads_lock ();
2956 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2957 /* See comment in wait_for_tids about thread cleanup */
2958 mono_threads_unlock ();
2959 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2960 thread_cleanup (wait->threads [ret]);
2962 mono_threads_unlock ();
2966 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2968 struct wait_data *wait=(struct wait_data *)user;
2970 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2972 MonoInternalThread *thread=(MonoInternalThread *)value;
2974 /* Ignore background threads, we abort them later */
2975 /* Do not lock here since it is not needed and the caller holds threads_lock */
2976 if (thread->state & ThreadState_Background) {
2977 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2978 return; /* just leave, ignore */
2981 if (mono_gc_is_finalizer_internal_thread (thread)) {
2982 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2986 if (thread == mono_thread_internal_current ()) {
2987 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2991 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2992 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2996 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2997 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3001 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3002 if (handle == NULL) {
3003 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3007 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3008 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3009 wait->handles[wait->num]=handle;
3010 wait->threads[wait->num]=thread;
3013 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3015 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3020 /* Just ignore the rest, we can't do anything with
3027 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3029 struct wait_data *wait=(struct wait_data *)user;
3030 MonoNativeThreadId self = mono_native_thread_id_get ();
3031 MonoInternalThread *thread = (MonoInternalThread *)value;
3034 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3037 /* The finalizer thread is not a background thread */
3038 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3039 && (thread->state & ThreadState_Background) != 0
3040 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3042 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3046 /* printf ("A: %d\n", wait->num); */
3047 wait->handles[wait->num]=thread->handle;
3048 wait->threads[wait->num]=thread;
3051 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3052 mono_thread_internal_stop (thread);
3056 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3057 && !mono_gc_is_finalizer_internal_thread (thread);
3061 * mono_threads_set_shutting_down:
3063 * Is called by a thread that wants to shut down Mono. If the runtime is already
3064 * shutting down, the calling thread is suspended/stopped, and this function never
3068 mono_threads_set_shutting_down (void)
3070 MonoInternalThread *current_thread = mono_thread_internal_current ();
3072 mono_threads_lock ();
3074 if (shutting_down) {
3075 mono_threads_unlock ();
3077 /* Make sure we're properly suspended/stopped */
3079 LOCK_THREAD (current_thread);
3081 if ((current_thread->state & ThreadState_SuspendRequested) ||
3082 (current_thread->state & ThreadState_AbortRequested) ||
3083 (current_thread->state & ThreadState_StopRequested)) {
3084 UNLOCK_THREAD (current_thread);
3085 mono_thread_execute_interruption ();
3087 current_thread->state |= ThreadState_Stopped;
3088 UNLOCK_THREAD (current_thread);
3091 /*since we're killing the thread, unset the current domain.*/
3092 mono_domain_unset ();
3094 /* Wake up other threads potentially waiting for us */
3095 mono_thread_info_exit ();
3097 shutting_down = TRUE;
3099 /* Not really a background state change, but this will
3100 * interrupt the main thread if it is waiting for all
3101 * the other threads.
3103 SetEvent (background_change_event);
3105 mono_threads_unlock ();
3109 void mono_thread_manage (void)
3111 struct wait_data wait_data;
3112 struct wait_data *wait = &wait_data;
3114 memset (wait, 0, sizeof (struct wait_data));
3115 /* join each thread that's still running */
3116 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3118 mono_threads_lock ();
3120 THREAD_DEBUG (g_message("%s: No threads", __func__));
3121 mono_threads_unlock ();
3124 mono_threads_unlock ();
3127 mono_threads_lock ();
3128 if (shutting_down) {
3129 /* somebody else is shutting down */
3130 mono_threads_unlock ();
3133 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3134 mono_g_hash_table_foreach (threads, print_tids, NULL));
3136 ResetEvent (background_change_event);
3138 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3139 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3140 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3141 mono_threads_unlock ();
3143 /* Something to wait for */
3144 wait_for_tids_or_state_change (wait, INFINITE);
3146 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3147 } while(wait->num>0);
3149 /* Mono is shutting down, so just wait for the end */
3150 if (!mono_runtime_try_shutdown ()) {
3151 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3152 mono_thread_suspend (mono_thread_internal_current ());
3153 mono_thread_execute_interruption ();
3157 * Remove everything but the finalizer thread and self.
3158 * Also abort all the background threads
3161 mono_threads_lock ();
3164 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3165 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3166 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3168 mono_threads_unlock ();
3170 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3172 /* Something to wait for */
3173 wait_for_tids (wait, INFINITE);
3175 } while (wait->num > 0);
3178 * give the subthreads a chance to really quit (this is mainly needed
3179 * to get correct user and system times from getrusage/wait/time(1)).
3180 * This could be removed if we avoid pthread_detach() and use pthread_join().
3182 mono_thread_info_yield ();
3186 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3188 MonoInternalThread *thread = (MonoInternalThread*)value;
3189 struct wait_data *wait = (struct wait_data*)user_data;
3193 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3195 * This needs no locking.
3197 if ((thread->state & ThreadState_Suspended) != 0 ||
3198 (thread->state & ThreadState_Stopped) != 0)
3201 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3202 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3206 wait->handles [wait->num] = handle;
3207 wait->threads [wait->num] = thread;
3213 * mono_thread_suspend_all_other_threads:
3215 * Suspend all managed threads except the finalizer thread and this thread. It is
3216 * not possible to resume them later.
3218 void mono_thread_suspend_all_other_threads (void)
3220 struct wait_data wait_data;
3221 struct wait_data *wait = &wait_data;
3223 MonoNativeThreadId self = mono_native_thread_id_get ();
3224 guint32 eventidx = 0;
3225 gboolean starting, finished;
3227 memset (wait, 0, sizeof (struct wait_data));
3229 * The other threads could be in an arbitrary state at this point, i.e.
3230 * they could be starting up, shutting down etc. This means that there could be
3231 * threads which are not even in the threads hash table yet.
3235 * First we set a barrier which will be checked by all threads before they
3236 * are added to the threads hash table, and they will exit if the flag is set.
3237 * This ensures that no threads could be added to the hash later.
3238 * We will use shutting_down as the barrier for now.
3240 g_assert (shutting_down);
3243 * We make multiple calls to WaitForMultipleObjects since:
3244 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3245 * - some threads could exit without becoming suspended
3250 * Make a copy of the hashtable since we can't do anything with
3251 * threads while threads_mutex is held.
3254 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3255 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3256 mono_threads_lock ();
3257 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3258 mono_threads_unlock ();
3261 /* Get the suspended events that we'll be waiting for */
3262 for (i = 0; i < wait->num; ++i) {
3263 MonoInternalThread *thread = wait->threads [i];
3265 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3266 || mono_gc_is_finalizer_internal_thread (thread)
3267 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3269 //CloseHandle (wait->handles [i]);
3270 wait->threads [i] = NULL; /* ignore this thread in next loop */
3274 LOCK_THREAD (thread);
3276 if ((thread->state & ThreadState_Suspended) != 0 ||
3277 (thread->state & ThreadState_StopRequested) != 0 ||
3278 (thread->state & ThreadState_Stopped) != 0) {
3279 UNLOCK_THREAD (thread);
3280 CloseHandle (wait->handles [i]);
3281 wait->threads [i] = NULL; /* ignore this thread in next loop */
3287 /* Convert abort requests into suspend requests */
3288 if ((thread->state & ThreadState_AbortRequested) != 0)
3289 thread->state &= ~ThreadState_AbortRequested;
3291 thread->state |= ThreadState_SuspendRequested;
3293 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3294 async_suspend_internal (thread, TRUE);
3296 if (eventidx <= 0) {
3298 * If there are threads which are starting up, we wait until they
3299 * are suspended when they try to register in the threads hash.
3300 * This is guaranteed to finish, since the threads which can create new
3301 * threads get suspended after a while.
3302 * FIXME: The finalizer thread can still create new threads.
3304 mono_threads_lock ();
3305 if (threads_starting_up)
3306 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3309 mono_threads_unlock ();
3311 mono_thread_info_sleep (100, NULL);
3319 MonoInternalThread *thread;
3320 MonoStackFrameInfo *frames;
3321 int nframes, max_frames;
3322 int nthreads, max_threads;
3323 MonoInternalThread **threads;
3324 } ThreadDumpUserData;
3326 static gboolean thread_dump_requested;
3328 /* This needs to be async safe */
3330 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3332 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3334 if (ud->nframes < ud->max_frames) {
3335 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3342 /* This needs to be async safe */
3343 static SuspendThreadResult
3344 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3346 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3347 MonoInternalThread *thread = user_data->thread;
3350 /* This no longer works with remote unwinding */
3352 wapi_desc = wapi_current_thread_desc ();
3353 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3358 if (thread == mono_thread_internal_current ())
3359 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3361 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3363 return MonoResumeThread;
3367 int nthreads, max_threads;
3368 MonoInternalThread **threads;
3369 } CollectThreadsUserData;
3372 collect_thread (gpointer key, gpointer value, gpointer user)
3374 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3375 MonoInternalThread *thread = (MonoInternalThread *)value;
3377 if (ud->nthreads < ud->max_threads)
3378 ud->threads [ud->nthreads ++] = thread;
3382 * Collect running threads into the THREADS array.
3383 * THREADS should be an array allocated on the stack.
3386 collect_threads (MonoInternalThread **thread_array, int max_threads)
3388 CollectThreadsUserData ud;
3390 memset (&ud, 0, sizeof (ud));
3391 /* This array contains refs, but its on the stack, so its ok */
3392 ud.threads = thread_array;
3393 ud.max_threads = max_threads;
3395 mono_threads_lock ();
3396 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3397 mono_threads_unlock ();
3403 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3405 GString* text = g_string_new (0);
3407 GError *error = NULL;
3410 ud->thread = thread;
3413 /* Collect frames for the thread */
3414 if (thread == mono_thread_internal_current ()) {
3415 get_thread_dump (mono_thread_info_current (), ud);
3417 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3421 * Do all the non async-safe work outside of get_thread_dump.
3424 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3426 g_string_append_printf (text, "\n\"%s\"", name);
3429 else if (thread->threadpool_thread) {
3430 g_string_append (text, "\n\"<threadpool thread>\"");
3432 g_string_append (text, "\n\"<unnamed thread>\"");
3435 for (i = 0; i < ud->nframes; ++i) {
3436 MonoStackFrameInfo *frame = &ud->frames [i];
3437 MonoMethod *method = NULL;
3439 if (frame->type == FRAME_TYPE_MANAGED)
3440 method = mono_jit_info_get_method (frame->ji);
3443 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3444 g_string_append_printf (text, " %s\n", location);
3447 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3451 fprintf (stdout, "%s", text->str);
3453 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3454 OutputDebugStringA(text->str);
3457 g_string_free (text, TRUE);
3462 mono_threads_perform_thread_dump (void)
3464 ThreadDumpUserData ud;
3465 MonoInternalThread *thread_array [128];
3466 int tindex, nthreads;
3468 if (!thread_dump_requested)
3471 printf ("Full thread dump:\n");
3473 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3474 nthreads = collect_threads (thread_array, 128);
3476 memset (&ud, 0, sizeof (ud));
3477 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3478 ud.max_frames = 256;
3480 for (tindex = 0; tindex < nthreads; ++tindex)
3481 dump_thread (thread_array [tindex], &ud);
3485 thread_dump_requested = FALSE;
3488 /* Obtain the thread dump of all threads */
3490 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3494 ThreadDumpUserData ud;
3495 MonoInternalThread *thread_array [128];
3496 MonoDomain *domain = mono_domain_get ();
3497 MonoDebugSourceLocation *location;
3498 int tindex, nthreads;
3500 mono_error_init (&error);
3502 *out_threads = NULL;
3503 *out_stack_frames = NULL;
3505 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3506 nthreads = collect_threads (thread_array, 128);
3508 memset (&ud, 0, sizeof (ud));
3509 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3510 ud.max_frames = 256;
3512 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3513 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3515 for (tindex = 0; tindex < nthreads; ++tindex) {
3516 MonoInternalThread *thread = thread_array [tindex];
3517 MonoArray *thread_frames;
3523 /* Collect frames for the thread */
3524 if (thread == mono_thread_internal_current ()) {
3525 get_thread_dump (mono_thread_info_current (), &ud);
3527 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3530 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3532 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3533 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3535 for (i = 0; i < ud.nframes; ++i) {
3536 MonoStackFrameInfo *frame = &ud.frames [i];
3537 MonoMethod *method = NULL;
3538 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3539 if (!mono_error_ok (&error))
3542 sf->native_offset = frame->native_offset;
3544 if (frame->type == FRAME_TYPE_MANAGED)
3545 method = mono_jit_info_get_method (frame->ji);
3548 sf->method_address = (gsize) frame->ji->code_start;
3550 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3551 mono_error_raise_exception (&error); /* FIXME don't raise here */
3552 MONO_OBJECT_SETREF (sf, method, rm);
3554 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3556 sf->il_offset = location->il_offset;
3558 if (location && location->source_file) {
3559 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3560 sf->line = location->row;
3561 sf->column = location->column;
3563 mono_debug_free_source_location (location);
3568 mono_array_setref (thread_frames, i, sf);
3574 mono_error_raise_exception (&error); /* FIXME don't raise here */
3578 * mono_threads_request_thread_dump:
3580 * Ask all threads except the current to print their stacktrace to stdout.
3583 mono_threads_request_thread_dump (void)
3585 /*The new thread dump code runs out of the finalizer thread. */
3586 thread_dump_requested = TRUE;
3587 mono_gc_finalize_notify ();
3592 gint allocated; /* +1 so that refs [allocated] == NULL */
3596 typedef struct ref_stack RefStack;
3599 ref_stack_new (gint initial_size)
3603 initial_size = MAX (initial_size, 16) + 1;
3604 rs = g_new0 (RefStack, 1);
3605 rs->refs = g_new0 (gpointer, initial_size);
3606 rs->allocated = initial_size;
3611 ref_stack_destroy (gpointer ptr)
3613 RefStack *rs = (RefStack *)ptr;
3622 ref_stack_push (RefStack *rs, gpointer ptr)
3624 g_assert (rs != NULL);
3626 if (rs->bottom >= rs->allocated) {
3627 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3628 rs->allocated <<= 1;
3629 rs->refs [rs->allocated] = NULL;
3631 rs->refs [rs->bottom++] = ptr;
3635 ref_stack_pop (RefStack *rs)
3637 if (rs == NULL || rs->bottom == 0)
3641 rs->refs [rs->bottom] = NULL;
3645 ref_stack_find (RefStack *rs, gpointer ptr)
3652 for (refs = rs->refs; refs && *refs; refs++) {
3660 * mono_thread_push_appdomain_ref:
3662 * Register that the current thread may have references to objects in domain
3663 * @domain on its stack. Each call to this function should be paired with a
3664 * call to pop_appdomain_ref.
3667 mono_thread_push_appdomain_ref (MonoDomain *domain)
3669 MonoInternalThread *thread = mono_thread_internal_current ();
3672 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3673 SPIN_LOCK (thread->lock_thread_id);
3674 if (thread->appdomain_refs == NULL)
3675 thread->appdomain_refs = ref_stack_new (16);
3676 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3677 SPIN_UNLOCK (thread->lock_thread_id);
3682 mono_thread_pop_appdomain_ref (void)
3684 MonoInternalThread *thread = mono_thread_internal_current ();
3687 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3688 SPIN_LOCK (thread->lock_thread_id);
3689 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3690 SPIN_UNLOCK (thread->lock_thread_id);
3695 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3698 SPIN_LOCK (thread->lock_thread_id);
3699 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3700 SPIN_UNLOCK (thread->lock_thread_id);
3705 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3707 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3710 typedef struct abort_appdomain_data {
3711 struct wait_data wait;
3713 } abort_appdomain_data;
3716 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3718 MonoInternalThread *thread = (MonoInternalThread*)value;
3719 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3720 MonoDomain *domain = data->domain;
3722 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3723 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3725 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3726 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3729 data->wait.handles [data->wait.num] = handle;
3730 data->wait.threads [data->wait.num] = thread;
3733 /* Just ignore the rest, we can't do anything with
3741 * mono_threads_abort_appdomain_threads:
3743 * Abort threads which has references to the given appdomain.
3746 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3748 #ifdef __native_client__
3752 abort_appdomain_data user_data;
3754 int orig_timeout = timeout;
3757 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3759 start_time = mono_msec_ticks ();
3761 mono_threads_lock ();
3763 user_data.domain = domain;
3764 user_data.wait.num = 0;
3765 /* This shouldn't take any locks */
3766 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3767 mono_threads_unlock ();
3769 if (user_data.wait.num > 0) {
3770 /* Abort the threads outside the threads lock */
3771 for (i = 0; i < user_data.wait.num; ++i)
3772 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3775 * We should wait for the threads either to abort, or to leave the
3776 * domain. We can't do the latter, so we wait with a timeout.
3778 wait_for_tids (&user_data.wait, 100);
3781 /* Update remaining time */
3782 timeout -= mono_msec_ticks () - start_time;
3783 start_time = mono_msec_ticks ();
3785 if (orig_timeout != -1 && timeout < 0)
3788 while (user_data.wait.num > 0);
3790 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3796 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3798 MonoInternalThread *thread = (MonoInternalThread*)value;
3799 MonoDomain *domain = (MonoDomain*)user_data;
3802 /* No locking needed here */
3803 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3805 if (thread->cached_culture_info) {
3806 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3807 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3808 if (obj && obj->vtable->domain == domain)
3809 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3815 * mono_threads_clear_cached_culture:
3817 * Clear the cached_current_culture from all threads if it is in the
3821 mono_threads_clear_cached_culture (MonoDomain *domain)
3823 mono_threads_lock ();
3824 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3825 mono_threads_unlock ();
3829 * mono_thread_get_undeniable_exception:
3831 * Return an exception which needs to be raised when leaving a catch clause.
3832 * This is used for undeniable exception propagation.
3835 mono_thread_get_undeniable_exception (void)
3837 MonoInternalThread *thread = mono_thread_internal_current ();
3839 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3841 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3842 * exception if the thread no longer references a dying appdomain.
3844 thread->abort_exc->trace_ips = NULL;
3845 thread->abort_exc->stack_trace = NULL;
3846 return thread->abort_exc;
3852 #if MONO_SMALL_CONFIG
3853 #define NUM_STATIC_DATA_IDX 4
3854 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3858 #define NUM_STATIC_DATA_IDX 8
3859 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3860 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3864 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3865 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3868 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3870 gpointer *static_data = (gpointer *)addr;
3872 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3873 void **ptr = (void **)static_data [i];
3878 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3879 void **p = ptr + idx;
3882 mark_func ((MonoObject**)p, gc_data);
3888 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3890 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3894 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3896 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3900 * mono_alloc_static_data
3902 * Allocate memory blocks for storing threads or context static data
3905 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3907 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3910 gpointer* static_data = *static_data_ptr;
3912 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3913 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3915 if (mono_gc_user_markers_supported ()) {
3916 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3917 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3919 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3920 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3923 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3924 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3925 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3926 *static_data_ptr = static_data;
3927 static_data [0] = static_data;
3930 for (i = 1; i <= idx; ++i) {
3931 if (static_data [i])
3934 if (mono_gc_user_markers_supported ())
3935 static_data [i] = g_malloc0 (static_data_size [i]);
3937 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3938 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3939 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3944 mono_free_static_data (gpointer* static_data)
3947 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3948 gpointer p = static_data [i];
3952 * At this point, the static data pointer array is still registered with the
3953 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3954 * data. Freeing the individual arrays without first nulling their slots
3955 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3956 * such an already freed array. See bug #13813.
3958 static_data [i] = NULL;
3959 mono_memory_write_barrier ();
3960 if (mono_gc_user_markers_supported ())
3963 mono_gc_free_fixed (p);
3965 mono_gc_free_fixed (static_data);
3969 * mono_init_static_data_info
3971 * Initializes static data counters
3973 static void mono_init_static_data_info (StaticDataInfo *static_data)
3975 static_data->idx = 0;
3976 static_data->offset = 0;
3977 static_data->freelist = NULL;
3981 * mono_alloc_static_data_slot
3983 * Generates an offset for static data. static_data contains the counters
3984 * used to generate it.
3987 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3989 if (!static_data->idx && !static_data->offset) {
3991 * we use the first chunk of the first allocation also as
3992 * an array for the rest of the data
3994 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3996 static_data->offset += align - 1;
3997 static_data->offset &= ~(align - 1);
3998 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3999 static_data->idx ++;
4000 g_assert (size <= static_data_size [static_data->idx]);
4001 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4002 static_data->offset = 0;
4004 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4005 static_data->offset += size;
4010 * ensure thread static fields already allocated are valid for thread
4011 * This function is called when a thread is created or on thread attach.
4014 thread_adjust_static_data (MonoInternalThread *thread)
4016 mono_threads_lock ();
4017 if (thread_static_info.offset || thread_static_info.idx > 0) {
4018 /* get the current allocated size */
4019 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4020 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4022 mono_threads_unlock ();
4026 * LOCKING: requires that threads_mutex is held
4029 context_adjust_static_data (MonoAppContext *ctx)
4031 if (context_static_info.offset || context_static_info.idx > 0) {
4032 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4033 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4034 ctx->data->static_data = ctx->static_data;
4039 * LOCKING: requires that threads_mutex is held
4042 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4044 MonoInternalThread *thread = (MonoInternalThread *)value;
4045 guint32 offset = GPOINTER_TO_UINT (user);
4047 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4051 * LOCKING: requires that threads_mutex is held
4054 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4056 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4061 guint32 offset = GPOINTER_TO_UINT (user);
4062 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4063 ctx->data->static_data = ctx->static_data;
4066 static StaticDataFreeList*
4067 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4069 StaticDataFreeList* prev = NULL;
4070 StaticDataFreeList* tmp = static_data->freelist;
4072 if (tmp->size == size) {
4074 prev->next = tmp->next;
4076 static_data->freelist = tmp->next;
4085 #if SIZEOF_VOID_P == 4
4092 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4094 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4096 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4097 MonoBitSet *rb = sets [idx];
4098 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4099 offset /= sizeof (uintptr_t);
4100 /* offset is now the bitmap offset */
4101 for (int i = 0; i < numbits; ++i) {
4102 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4103 mono_bitset_set_fast (rb, offset + i);
4108 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4110 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4111 MonoBitSet *rb = sets [idx];
4112 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4113 offset /= sizeof (uintptr_t);
4114 /* offset is now the bitmap offset */
4115 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4116 mono_bitset_clear_fast (rb, offset + i);
4120 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4122 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4124 StaticDataInfo *info;
4127 if (static_type == SPECIAL_STATIC_THREAD) {
4128 info = &thread_static_info;
4129 sets = thread_reference_bitmaps;
4131 info = &context_static_info;
4132 sets = context_reference_bitmaps;
4135 mono_threads_lock ();
4137 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4141 offset = item->offset;
4144 offset = mono_alloc_static_data_slot (info, size, align);
4147 update_reference_bitmap (sets, offset, bitmap, numbits);
4149 if (static_type == SPECIAL_STATIC_THREAD) {
4150 /* This can be called during startup */
4151 if (threads != NULL)
4152 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4154 if (contexts != NULL)
4155 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4157 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4160 mono_threads_unlock ();
4166 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4168 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4170 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4171 return get_thread_static_data (thread, offset);
4173 return get_context_static_data (thread->current_appcontext, offset);
4178 mono_get_special_static_data (guint32 offset)
4180 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4189 * LOCKING: requires that threads_mutex is held
4192 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4194 MonoInternalThread *thread = (MonoInternalThread *)value;
4195 OffsetSize *data = (OffsetSize *)user;
4196 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4197 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4200 if (!thread->static_data || !thread->static_data [idx])
4202 ptr = ((char*) thread->static_data [idx]) + off;
4203 mono_gc_bzero_atomic (ptr, data->size);
4207 * LOCKING: requires that threads_mutex is held
4210 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4212 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4217 OffsetSize *data = (OffsetSize *)user;
4218 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4219 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4222 if (!ctx->static_data || !ctx->static_data [idx])
4225 ptr = ((char*) ctx->static_data [idx]) + off;
4226 mono_gc_bzero_atomic (ptr, data->size);
4230 do_free_special_slot (guint32 offset, guint32 size)
4232 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4234 StaticDataInfo *info;
4236 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4237 info = &thread_static_info;
4238 sets = thread_reference_bitmaps;
4240 info = &context_static_info;
4241 sets = context_reference_bitmaps;
4244 guint32 data_offset = offset;
4245 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4246 OffsetSize data = { data_offset, size };
4248 clear_reference_bitmap (sets, data.offset, data.size);
4250 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4251 if (threads != NULL)
4252 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4254 if (contexts != NULL)
4255 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4258 if (!mono_runtime_is_shutting_down ()) {
4259 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4261 item->offset = offset;
4264 item->next = info->freelist;
4265 info->freelist = item;
4270 do_free_special (gpointer key, gpointer value, gpointer data)
4272 MonoClassField *field = (MonoClassField *)key;
4273 guint32 offset = GPOINTER_TO_UINT (value);
4276 size = mono_type_size (field->type, &align);
4277 do_free_special_slot (offset, size);
4281 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4283 mono_threads_lock ();
4285 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4287 mono_threads_unlock ();
4291 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4293 /* Only ever called for ThreadLocal instances */
4294 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4296 mono_threads_lock ();
4297 do_free_special_slot (offset, size);
4298 mono_threads_unlock ();
4302 static void CALLBACK dummy_apc (ULONG_PTR param)
4308 * mono_thread_execute_interruption
4310 * Performs the operation that the requested thread state requires (abort,
4313 static MonoException*
4314 mono_thread_execute_interruption (void)
4316 MonoInternalThread *thread = mono_thread_internal_current ();
4317 MonoThread *sys_thread = mono_thread_current ();
4319 LOCK_THREAD (thread);
4321 /* MonoThread::interruption_requested can only be changed with atomics */
4322 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4323 /* this will consume pending APC calls */
4325 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4327 InterlockedDecrement (&thread_interruption_requested);
4329 /* Clear the interrupted flag of the thread so it can wait again */
4330 mono_thread_info_clear_self_interrupt ();
4333 if ((thread->state & ThreadState_AbortRequested) != 0) {
4334 UNLOCK_THREAD (thread);
4335 if (thread->abort_exc == NULL) {
4337 * This might be racy, but it has to be called outside the lock
4338 * since it calls managed code.
4340 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4342 return thread->abort_exc;
4344 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4345 /* calls UNLOCK_THREAD (thread) */
4346 self_suspend_internal ();
4349 else if ((thread->state & ThreadState_StopRequested) != 0) {
4350 /* FIXME: do this through the JIT? */
4352 UNLOCK_THREAD (thread);
4354 mono_thread_exit ();
4356 } else if (sys_thread->pending_exception) {
4359 exc = sys_thread->pending_exception;
4360 sys_thread->pending_exception = NULL;
4362 UNLOCK_THREAD (thread);
4364 } else if (thread->thread_interrupt_requested) {
4366 thread->thread_interrupt_requested = FALSE;
4367 UNLOCK_THREAD (thread);
4369 return(mono_get_exception_thread_interrupted ());
4372 UNLOCK_THREAD (thread);
4378 * mono_thread_request_interruption
4380 * A signal handler can call this method to request the interruption of a
4381 * thread. The result of the interruption will depend on the current state of
4382 * the thread. If the result is an exception that needs to be throw, it is
4383 * provided as return value.
4386 mono_thread_request_interruption (gboolean running_managed)
4388 MonoInternalThread *thread = mono_thread_internal_current ();
4390 /* The thread may already be stopping */
4395 if (thread->interrupt_on_stop &&
4396 thread->state & ThreadState_StopRequested &&
4397 thread->state & ThreadState_Background)
4401 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4403 InterlockedIncrement (&thread_interruption_requested);
4405 if (!running_managed || is_running_protected_wrapper ()) {
4406 /* Can't stop while in unmanaged code. Increase the global interruption
4407 request count. When exiting the unmanaged method the count will be
4408 checked and the thread will be interrupted. */
4410 /* this will awake the thread if it is in WaitForSingleObject
4412 /* Our implementation of this function ignores the func argument */
4414 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4416 mono_thread_info_self_interrupt ();
4421 return mono_thread_execute_interruption ();
4425 /*This function should be called by a thread after it has exited all of
4426 * its handle blocks at interruption time.*/
4428 mono_thread_resume_interruption (void)
4430 MonoInternalThread *thread = mono_thread_internal_current ();
4431 gboolean still_aborting;
4433 /* The thread may already be stopping */
4437 LOCK_THREAD (thread);
4438 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4439 UNLOCK_THREAD (thread);
4441 /*This can happen if the protected block called Thread::ResetAbort*/
4442 if (!still_aborting)
4445 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4447 InterlockedIncrement (&thread_interruption_requested);
4449 mono_thread_info_self_interrupt ();
4451 return mono_thread_execute_interruption ();
4454 gboolean mono_thread_interruption_requested ()
4456 if (thread_interruption_requested) {
4457 MonoInternalThread *thread = mono_thread_internal_current ();
4458 /* The thread may already be stopping */
4460 return (thread->interruption_requested);
4465 static MonoException*
4466 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4468 MonoInternalThread *thread = mono_thread_internal_current ();
4470 /* The thread may already be stopping */
4474 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4475 MonoException* exc = mono_thread_execute_interruption ();
4483 * Performs the interruption of the current thread, if one has been requested,
4484 * and the thread is not running a protected wrapper.
4485 * Return the exception which needs to be thrown, if any.
4488 mono_thread_interruption_checkpoint (void)
4490 return mono_thread_interruption_checkpoint_request (FALSE);
4494 * Performs the interruption of the current thread, if one has been requested.
4495 * Return the exception which needs to be thrown, if any.
4498 mono_thread_force_interruption_checkpoint_noraise (void)
4500 return mono_thread_interruption_checkpoint_request (TRUE);
4504 * mono_thread_get_and_clear_pending_exception:
4506 * Return any pending exceptions for the current thread and clear it as a side effect.
4509 mono_thread_get_and_clear_pending_exception (void)
4511 MonoInternalThread *thread = mono_thread_internal_current ();
4512 MonoThread *sys_thread = mono_thread_current ();
4514 /* The thread may already be stopping */
4518 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4519 return mono_thread_execute_interruption ();
4522 if (sys_thread->pending_exception) {
4523 MonoException *exc = sys_thread->pending_exception;
4525 sys_thread->pending_exception = NULL;
4533 * mono_set_pending_exception:
4535 * Set the pending exception of the current thread to EXC.
4536 * The exception will be thrown when execution returns to managed code.
4539 mono_set_pending_exception (MonoException *exc)
4541 MonoThread *thread = mono_thread_current ();
4543 /* The thread may already be stopping */
4547 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4549 mono_thread_request_interruption (FALSE);
4553 * mono_thread_interruption_request_flag:
4555 * Returns the address of a flag that will be non-zero if an interruption has
4556 * been requested for a thread. The thread to interrupt may not be the current
4557 * thread, so an additional call to mono_thread_interruption_requested() or
4558 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4561 gint32* mono_thread_interruption_request_flag ()
4563 return &thread_interruption_requested;
4567 mono_thread_init_apartment_state (void)
4570 MonoInternalThread* thread = mono_thread_internal_current ();
4572 /* Positive return value indicates success, either
4573 * S_OK if this is first CoInitialize call, or
4574 * S_FALSE if CoInitialize already called, but with same
4575 * threading model. A negative value indicates failure,
4576 * probably due to trying to change the threading model.
4578 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4579 ? COINIT_APARTMENTTHREADED
4580 : COINIT_MULTITHREADED) < 0) {
4581 thread->apartment_state = ThreadApartmentState_Unknown;
4587 mono_thread_cleanup_apartment_state (void)
4590 MonoInternalThread* thread = mono_thread_internal_current ();
4592 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4599 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4601 LOCK_THREAD (thread);
4602 thread->state |= state;
4603 UNLOCK_THREAD (thread);
4607 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4609 LOCK_THREAD (thread);
4610 thread->state &= ~state;
4611 UNLOCK_THREAD (thread);
4615 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4617 gboolean ret = FALSE;
4619 LOCK_THREAD (thread);
4621 if ((thread->state & test) != 0) {
4625 UNLOCK_THREAD (thread);
4630 static gboolean has_tls_get = FALSE;
4633 mono_runtime_set_has_tls_get (gboolean val)
4639 mono_runtime_has_tls_get (void)
4645 self_interrupt_thread (void *_unused)
4647 MonoThreadInfo *info = mono_thread_info_current ();
4648 MonoException *exc = mono_thread_execute_interruption ();
4649 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4650 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. */
4651 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4655 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4659 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4663 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4665 MonoJitInfo **dest = (MonoJitInfo **)data;
4671 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4673 MonoJitInfo *ji = NULL;
4678 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4679 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4680 * where we hold runtime locks.
4682 if (!mono_threads_is_coop_enabled ())
4683 mono_thread_info_set_is_async_context (TRUE);
4684 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4685 if (!mono_threads_is_coop_enabled ())
4686 mono_thread_info_set_is_async_context (FALSE);
4691 MonoInternalThread *thread;
4692 gboolean install_async_abort;
4693 MonoThreadInfoInterruptToken *interrupt_token;
4696 static SuspendThreadResult
4697 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4699 AbortThreadData *data = (AbortThreadData *)ud;
4700 MonoInternalThread *thread = data->thread;
4701 MonoJitInfo *ji = NULL;
4702 gboolean protected_wrapper;
4703 gboolean running_managed;
4705 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4706 return MonoResumeThread;
4708 /*someone is already interrupting it*/
4709 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4710 return MonoResumeThread;
4712 InterlockedIncrement (&thread_interruption_requested);
4714 ji = mono_thread_info_get_last_managed (info);
4715 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4716 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4718 if (!protected_wrapper && running_managed) {
4719 /*We are in managed code*/
4720 /*Set the thread to call */
4721 if (data->install_async_abort)
4722 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4723 return MonoResumeThread;
4726 * This will cause waits to be broken.
4727 * It will also prevent the thread from entering a wait, so if the thread returns
4728 * from the wait before it receives the abort signal, it will just spin in the wait
4729 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4732 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4734 return MonoResumeThread;
4739 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4741 AbortThreadData data;
4743 g_assert (thread != mono_thread_internal_current ());
4745 data.thread = thread;
4746 data.install_async_abort = install_async_abort;
4747 data.interrupt_token = NULL;
4749 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4750 if (data.interrupt_token)
4751 mono_thread_info_finish_interrupt (data.interrupt_token);
4752 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4756 self_abort_internal (void)
4760 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4761 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4763 exc = mono_thread_request_interruption (TRUE);
4765 mono_raise_exception (exc);
4767 mono_thread_info_self_interrupt ();
4771 MonoInternalThread *thread;
4773 MonoThreadInfoInterruptToken *interrupt_token;
4774 } SuspendThreadData;
4776 static SuspendThreadResult
4777 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4779 SuspendThreadData *data = (SuspendThreadData *)ud;
4780 MonoInternalThread *thread = data->thread;
4781 MonoJitInfo *ji = NULL;
4782 gboolean protected_wrapper;
4783 gboolean running_managed;
4785 ji = mono_thread_info_get_last_managed (info);
4786 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4787 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4789 if (running_managed && !protected_wrapper) {
4790 thread->state &= ~ThreadState_SuspendRequested;
4791 thread->state |= ThreadState_Suspended;
4792 return KeepSuspended;
4794 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4795 InterlockedIncrement (&thread_interruption_requested);
4796 if (data->interrupt)
4797 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4799 return MonoResumeThread;
4803 /* LOCKING: called with @thread synch_cs held, and releases it */
4805 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4807 SuspendThreadData data;
4809 g_assert (thread != mono_thread_internal_current ());
4811 data.thread = thread;
4812 data.interrupt = interrupt;
4813 data.interrupt_token = NULL;
4815 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4816 if (data.interrupt_token)
4817 mono_thread_info_finish_interrupt (data.interrupt_token);
4819 UNLOCK_THREAD (thread);
4822 /* LOCKING: called with @thread synch_cs held, and releases it */
4824 self_suspend_internal (void)
4826 MonoInternalThread *thread;
4828 thread = mono_thread_internal_current ();
4830 mono_thread_info_begin_self_suspend ();
4831 thread->state &= ~ThreadState_SuspendRequested;
4832 thread->state |= ThreadState_Suspended;
4834 UNLOCK_THREAD (thread);
4836 mono_thread_info_end_self_suspend ();
4840 * mono_thread_is_foreign:
4841 * @thread: the thread to query
4843 * This function allows one to determine if a thread was created by the mono runtime and has
4844 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4846 * Returns: TRUE if @thread was not created by the runtime.
4849 mono_thread_is_foreign (MonoThread *thread)
4851 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4852 return info->runtime_thread == FALSE;
4856 * mono_add_joinable_thread:
4858 * Add TID to the list of joinable threads.
4859 * LOCKING: Acquires the threads lock.
4862 mono_threads_add_joinable_thread (gpointer tid)
4866 * We cannot detach from threads because it causes problems like
4867 * 2fd16f60/r114307. So we collect them and join them when
4868 * we have time (in he finalizer thread).
4870 joinable_threads_lock ();
4871 if (!joinable_threads)
4872 joinable_threads = g_hash_table_new (NULL, NULL);
4873 g_hash_table_insert (joinable_threads, tid, tid);
4874 joinable_thread_count ++;
4875 joinable_threads_unlock ();
4877 mono_gc_finalize_notify ();
4882 * mono_threads_join_threads:
4884 * Join all joinable threads. This is called from the finalizer thread.
4885 * LOCKING: Acquires the threads lock.
4888 mono_threads_join_threads (void)
4891 GHashTableIter iter;
4898 if (!joinable_thread_count)
4902 joinable_threads_lock ();
4904 if (g_hash_table_size (joinable_threads)) {
4905 g_hash_table_iter_init (&iter, joinable_threads);
4906 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4907 thread = (pthread_t)tid;
4908 g_hash_table_remove (joinable_threads, key);
4909 joinable_thread_count --;
4912 joinable_threads_unlock ();
4914 if (thread != pthread_self ())
4915 /* This shouldn't block */
4916 pthread_join (thread, NULL);
4927 * Wait for thread TID to exit.
4928 * LOCKING: Acquires the threads lock.
4931 mono_thread_join (gpointer tid)
4935 gboolean found = FALSE;
4937 joinable_threads_lock ();
4938 if (!joinable_threads)
4939 joinable_threads = g_hash_table_new (NULL, NULL);
4940 if (g_hash_table_lookup (joinable_threads, tid)) {
4941 g_hash_table_remove (joinable_threads, tid);
4942 joinable_thread_count --;
4945 joinable_threads_unlock ();
4948 thread = (pthread_t)tid;
4949 pthread_join (thread, NULL);
4954 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4956 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4957 mono_thread_interruption_checkpoint ();
4960 static inline gboolean
4961 is_appdomainunloaded_exception (MonoClass *klass)
4963 return klass == mono_class_get_appdomain_unloaded_exception_class ();
4966 static inline gboolean
4967 is_threadabort_exception (MonoClass *klass)
4969 return klass == mono_defaults.threadabortexception_class;
4973 mono_thread_internal_unhandled_exception (MonoObject* exc)
4975 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4976 MonoClass *klass = exc->vtable->klass;
4977 if (is_threadabort_exception (klass)) {
4978 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4979 } else if (!is_appdomainunloaded_exception (klass)) {
4980 mono_unhandled_exception (exc);
4981 if (mono_environment_exitcode_get () == 1)
4988 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4990 mono_threads_get_thread_dump (out_threads, out_stack_traces);