2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
45 #include <mono/metadata/gc-internals.h>
46 #include <mono/metadata/reflection-internals.h>
52 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
53 #define USE_TKILL_ON_ANDROID 1
56 #ifdef PLATFORM_ANDROID
59 #ifdef USE_TKILL_ON_ANDROID
60 extern int tkill (pid_t tid, int signal);
64 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_DEBUG(a)
66 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
67 #define THREAD_WAIT_DEBUG(a)
68 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
69 #define LIBGC_DEBUG(a)
71 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
72 #define SPIN_LOCK(i) do { \
73 if (SPIN_TRYLOCK (i)) \
77 #define SPIN_UNLOCK(i) i = 0
79 #define LOCK_THREAD(thread) lock_thread((thread))
80 #define UNLOCK_THREAD(thread) unlock_thread((thread))
82 /* Provide this for systems with glib < 2.6 */
83 #ifndef G_GSIZE_FORMAT
84 # if GLIB_SIZEOF_LONG == 8
85 # define G_GSIZE_FORMAT "lu"
87 # define G_GSIZE_FORMAT "u"
93 guint32 (*func)(void *);
109 typedef struct _StaticDataFreeList StaticDataFreeList;
110 struct _StaticDataFreeList {
111 StaticDataFreeList *next;
119 StaticDataFreeList *freelist;
122 /* Number of cached culture objects in the MonoThread->cached_culture_info array
123 * (per-type): we use the first NUM entries for CultureInfo and the last for
124 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
126 #define NUM_CACHED_CULTURES 4
127 #define CULTURES_START_IDX 0
128 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
130 /* Controls access to the 'threads' hash table */
131 static void mono_threads_lock (void);
132 static void mono_threads_unlock (void);
133 static MonoCoopMutex threads_mutex;
135 /* Controls access to the 'joinable_threads' hash table */
136 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
137 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
138 static mono_mutex_t joinable_threads_mutex;
140 /* Holds current status of static data heap */
141 static StaticDataInfo thread_static_info;
142 static StaticDataInfo context_static_info;
144 /* The hash of existing threads (key is thread ID, value is
145 * MonoInternalThread*) that need joining before exit
147 static MonoGHashTable *threads=NULL;
149 /* List of app context GC handles.
150 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
152 static GHashTable *contexts = NULL;
154 /* Cleanup queue for contexts. */
155 static MonoReferenceQueue *context_queue;
158 * Threads which are starting up and they are not in the 'threads' hash yet.
159 * When handle_store is called for a thread, it will be removed from this hash table.
160 * Protected by mono_threads_lock ().
162 static MonoGHashTable *threads_starting_up = NULL;
164 /* The TLS key that holds the MonoObject assigned to each thread */
165 static MonoNativeTlsKey current_object_key;
168 /* Protected by the threads lock */
169 static GHashTable *joinable_threads;
170 static int joinable_thread_count;
172 #ifdef MONO_HAVE_FAST_TLS
173 /* we need to use both the Tls* functions and __thread because
174 * the gc needs to see all the threads
176 MONO_FAST_TLS_DECLARE(tls_current_object);
177 #define SET_CURRENT_OBJECT(x) do { \
178 MONO_FAST_TLS_SET (tls_current_object, x); \
179 mono_native_tls_set_value (current_object_key, x); \
181 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
183 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
184 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
187 /* function called at thread start */
188 static MonoThreadStartCB mono_thread_start_cb = NULL;
190 /* function called at thread attach */
191 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
193 /* function called at thread cleanup */
194 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
196 /* The default stack size for each thread */
197 static guint32 default_stacksize = 0;
198 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
200 static void thread_adjust_static_data (MonoInternalThread *thread);
201 static void context_adjust_static_data (MonoAppContext *ctx);
202 static void mono_free_static_data (gpointer* static_data);
203 static void mono_init_static_data_info (StaticDataInfo *static_data);
204 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
205 static gboolean mono_thread_resume (MonoInternalThread* thread);
206 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
207 static void self_abort_internal (void);
208 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (void);
211 static MonoException* mono_thread_execute_interruption (void);
212 static void ref_stack_destroy (gpointer rs);
214 /* Spin lock for InterlockedXXX 64 bit functions */
215 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
216 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
217 static mono_mutex_t interlocked_mutex;
219 /* global count of thread interruptions requested */
220 static gint32 thread_interruption_requested = 0;
222 /* Event signaled when a thread changes its background mode */
223 static HANDLE background_change_event;
225 static gboolean shutting_down = FALSE;
227 static gint32 managed_thread_id_counter = 0;
229 /* Class lazy loading functions */
230 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
233 mono_threads_lock (void)
235 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
239 mono_threads_unlock (void)
241 mono_locks_coop_release (&threads_mutex, ThreadsLock);
246 get_next_managed_thread_id (void)
248 return InterlockedIncrement (&managed_thread_id_counter);
252 mono_thread_get_tls_key (void)
254 return current_object_key;
258 mono_thread_get_tls_offset (void)
261 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
265 static inline MonoNativeThreadId
266 thread_get_tid (MonoInternalThread *thread)
268 /* We store the tid as a guint64 to keep the object layout constant between platforms */
269 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
272 /* handle_store() and handle_remove() manage the array of threads that
273 * still need to be waited for when the main thread exits.
275 * If handle_store() returns FALSE the thread must not be started
276 * because Mono is shutting down.
278 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
280 mono_threads_lock ();
282 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
284 if (threads_starting_up)
285 mono_g_hash_table_remove (threads_starting_up, thread);
287 if (shutting_down && !force_attach) {
288 mono_threads_unlock ();
293 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
294 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
297 /* We don't need to duplicate thread->handle, because it is
298 * only closed when the thread object is finalized by the GC.
300 g_assert (thread->internal_thread);
301 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
302 thread->internal_thread);
304 mono_threads_unlock ();
309 static gboolean handle_remove(MonoInternalThread *thread)
312 gsize tid = thread->tid;
314 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
316 mono_threads_lock ();
319 /* We have to check whether the thread object for the
320 * tid is still the same in the table because the
321 * thread might have been destroyed and the tid reused
322 * in the meantime, in which case the tid would be in
323 * the table, but with another thread object.
325 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
326 mono_g_hash_table_remove (threads, (gpointer)tid);
335 mono_threads_unlock ();
337 /* Don't close the handle here, wait for the object finalizer
338 * to do it. Otherwise, the following race condition applies:
340 * 1) Thread exits (and handle_remove() closes the handle)
342 * 2) Some other handle is reassigned the same slot
344 * 3) Another thread tries to join the first thread, and
345 * blocks waiting for the reassigned handle to be signalled
346 * (which might never happen). This is possible, because the
347 * thread calling Join() still has a reference to the first
353 static void ensure_synch_cs_set (MonoInternalThread *thread)
355 MonoCoopMutex *synch_cs;
357 if (thread->synch_cs != NULL) {
361 synch_cs = g_new0 (MonoCoopMutex, 1);
362 mono_coop_mutex_init_recursive (synch_cs);
364 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
365 synch_cs, NULL) != NULL) {
366 /* Another thread must have installed this CS */
367 mono_coop_mutex_destroy (synch_cs);
373 lock_thread (MonoInternalThread *thread)
375 if (!thread->synch_cs)
376 ensure_synch_cs_set (thread);
378 g_assert (thread->synch_cs);
380 mono_coop_mutex_lock (thread->synch_cs);
384 unlock_thread (MonoInternalThread *thread)
386 mono_coop_mutex_unlock (thread->synch_cs);
390 * NOTE: this function can be called also for threads different from the current one:
391 * make sure no code called from it will ever assume it is run on the thread that is
392 * getting cleaned up.
394 static void thread_cleanup (MonoInternalThread *thread)
396 g_assert (thread != NULL);
398 if (thread->abort_state_handle) {
399 mono_gchandle_free (thread->abort_state_handle);
400 thread->abort_state_handle = 0;
402 thread->abort_exc = NULL;
403 thread->current_appcontext = NULL;
406 * This is necessary because otherwise we might have
407 * cross-domain references which will not get cleaned up when
408 * the target domain is unloaded.
410 if (thread->cached_culture_info) {
412 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
413 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
417 * thread->synch_cs can be NULL if this was called after
418 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
419 * This can happen only during shutdown.
420 * The shutting_down flag is not always set, so we can't assert on it.
422 if (thread->synch_cs)
423 LOCK_THREAD (thread);
425 thread->state |= ThreadState_Stopped;
426 thread->state &= ~ThreadState_Background;
428 if (thread->synch_cs)
429 UNLOCK_THREAD (thread);
432 An interruption request has leaked to cleanup. Adjust the global counter.
434 This can happen is the abort source thread finds the abortee (this) thread
435 in unmanaged code. If this thread never trips back to managed code or check
436 the local flag it will be left set and positively unbalance the global counter.
438 Leaving the counter unbalanced will cause a performance degradation since all threads
439 will now keep checking their local flags all the time.
441 if (InterlockedExchange (&thread->interruption_requested, 0))
442 InterlockedDecrement (&thread_interruption_requested);
444 /* if the thread is not in the hash it has been removed already */
445 if (!handle_remove (thread)) {
446 if (thread == mono_thread_internal_current ()) {
447 mono_domain_unset ();
448 mono_memory_barrier ();
450 /* This needs to be called even if handle_remove () fails */
451 if (mono_thread_cleanup_fn)
452 mono_thread_cleanup_fn (thread_get_tid (thread));
455 mono_release_type_locks (thread);
457 /* Can happen when we attach the profiler helper thread in order to heapshot. */
458 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
459 mono_profiler_thread_end (thread->tid);
461 if (thread == mono_thread_internal_current ()) {
463 * This will signal async signal handlers that the thread has exited.
464 * The profiler callback needs this to be set, so it cannot be done earlier.
466 mono_domain_unset ();
467 mono_memory_barrier ();
470 if (thread == mono_thread_internal_current ())
471 mono_thread_pop_appdomain_ref ();
473 thread->cached_culture_info = NULL;
475 mono_free_static_data (thread->static_data);
476 thread->static_data = NULL;
477 ref_stack_destroy (thread->appdomain_refs);
478 thread->appdomain_refs = NULL;
480 if (mono_thread_cleanup_fn)
481 mono_thread_cleanup_fn (thread_get_tid (thread));
483 if (mono_gc_is_moving ()) {
484 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
485 thread->thread_pinning_ref = NULL;
491 * A special static data offset (guint32) consists of 3 parts:
493 * [0] 6-bit index into the array of chunks.
494 * [6] 25-bit offset into the array.
495 * [31] Bit indicating thread or context static.
500 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
511 } SpecialStaticOffset;
513 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
514 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
516 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
517 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
518 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
519 (((SpecialStaticOffset *) &(x))->fields.f)
522 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
524 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
526 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
527 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
529 return ((char *) thread->static_data [idx]) + off;
533 get_context_static_data (MonoAppContext *ctx, guint32 offset)
535 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
537 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
538 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
540 return ((char *) ctx->static_data [idx]) + off;
544 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
546 static MonoClassField *current_thread_field = NULL;
550 if (!current_thread_field) {
551 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
552 g_assert (current_thread_field);
555 mono_class_vtable (domain, mono_defaults.thread_class);
556 mono_domain_lock (domain);
557 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
558 mono_domain_unlock (domain);
561 return (MonoThread **)get_thread_static_data (thread, offset);
565 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
567 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
569 g_assert (current->obj.vtable->domain == domain);
571 g_assert (!*current_thread_ptr);
572 *current_thread_ptr = current;
576 create_thread_object (MonoDomain *domain, MonoError *error)
578 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
579 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
584 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
588 thread = create_thread_object (domain, error);
589 if (!mono_error_ok (error))
592 MONO_OBJECT_SETREF (thread, internal_thread, internal);
597 static MonoInternalThread*
598 create_internal_thread (MonoError *error)
600 MonoInternalThread *thread;
603 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
604 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
605 if (!mono_error_ok (error))
608 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
609 mono_coop_mutex_init_recursive (thread->synch_cs);
611 thread->apartment_state = ThreadApartmentState_Unknown;
612 thread->managed_id = get_next_managed_thread_id ();
613 if (mono_gc_is_moving ()) {
614 thread->thread_pinning_ref = thread;
615 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
622 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate, MonoError *error)
624 MonoDomain *domain = mono_get_root_domain ();
626 mono_error_init (error);
627 if (!candidate || candidate->obj.vtable->domain != domain) {
628 candidate = new_thread_with_internal (domain, thread, error);
629 return_val_if_nok (error, FALSE);
631 set_current_thread_for_domain (domain, thread, candidate);
632 g_assert (!thread->root_domain_thread);
633 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
637 static guint32 WINAPI start_wrapper_internal(void *data)
640 MonoThreadInfo *info;
641 StartInfo *start_info = (StartInfo *)data;
642 guint32 (*start_func)(void *);
646 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
649 MonoInternalThread *internal = start_info->obj->internal_thread;
650 MonoObject *start_delegate = start_info->delegate;
651 MonoDomain *domain = start_info->obj->obj.vtable->domain;
653 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
655 /* We can be sure start_info->obj->tid and
656 * start_info->obj->handle have been set, because the thread
657 * was created suspended, and these values were set before the
661 info = mono_thread_info_current ();
663 internal->thread_info = info;
664 internal->small_id = info->small_id;
668 SET_CURRENT_OBJECT (internal);
670 /* Every thread references the appdomain which created it */
671 mono_thread_push_appdomain_ref (domain);
673 if (!mono_domain_set (domain, FALSE)) {
674 /* No point in raising an appdomain_unloaded exception here */
675 /* FIXME: Cleanup here */
676 mono_thread_pop_appdomain_ref ();
680 start_func = start_info->func;
681 start_arg = start_info->obj->start_obj;
683 start_arg = start_info->start_arg;
685 /* We have to do this here because mono_thread_new_init()
686 requires that root_domain_thread is set up. */
687 thread_adjust_static_data (internal);
688 init_root_domain_thread (internal, start_info->obj, &error);
689 mono_error_raise_exception (&error); /* FIXME don't raise here */
691 /* This MUST be called before any managed code can be
692 * executed, as it calls the callback function that (for the
693 * jit) sets the lmf marker.
695 mono_thread_new_init (tid, &tid, start_func);
696 internal->stack_ptr = &tid;
697 if (domain != mono_get_root_domain ())
698 set_current_thread_for_domain (domain, internal, start_info->obj);
700 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
702 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
704 /* On 2.0 profile (and higher), set explicitly since state might have been
706 if (internal->apartment_state == ThreadApartmentState_Unknown)
707 internal->apartment_state = ThreadApartmentState_MTA;
709 mono_thread_init_apartment_state ();
711 if(internal->start_notify!=NULL) {
712 /* Let the thread that called Start() know we're
715 ReleaseSemaphore (internal->start_notify, 1, NULL);
719 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
723 * Call this after calling start_notify, since the profiler callback might want
724 * to lock the thread, and the lock is held by thread_start () which waits for
727 mono_profiler_thread_start (tid);
729 /* if the name was set before starting, we didn't invoke the profiler callback */
730 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
731 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
732 mono_profiler_thread_name (internal->tid, tname);
733 mono_thread_info_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
736 /* start_func is set only for unmanaged start functions */
738 start_func (start_arg);
741 g_assert (start_delegate != NULL);
742 args [0] = start_arg;
743 /* we may want to handle the exception here. See comment below on unhandled exceptions */
744 mono_runtime_delegate_invoke (start_delegate, args, NULL);
747 /* If the thread calls ExitThread at all, this remaining code
748 * will not be executed, but the main thread will eventually
749 * call thread_cleanup() on this thread's behalf.
752 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
754 /* Do any cleanup needed for apartment state. This
755 * cannot be done in thread_cleanup since thread_cleanup could be
756 * called for a thread other than the current thread.
757 * mono_thread_cleanup_apartment_state cleans up apartment
758 * for the current thead */
759 mono_thread_cleanup_apartment_state ();
761 thread_cleanup (internal);
765 /* Remove the reference to the thread object in the TLS data,
766 * so the thread object can be finalized. This won't be
767 * reached if the thread threw an uncaught exception, so those
768 * thread handles will stay referenced :-( (This is due to
769 * missing support for scanning thread-specific data in the
770 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
773 SET_CURRENT_OBJECT (NULL);
778 static guint32 WINAPI start_wrapper(void *data)
782 /* Avoid scanning the frames above this frame during a GC */
783 mono_gc_set_stack_end ((void*)&dummy);
785 return start_wrapper_internal (data);
791 * Common thread creation code.
792 * LOCKING: Acquires the threads lock.
795 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
798 HANDLE thread_handle;
799 MonoNativeThreadId tid;
800 guint32 create_flags;
803 * Join joinable threads to prevent running out of threads since the finalizer
804 * thread might be blocked/backlogged.
806 mono_threads_join_threads ();
808 mono_error_init (error);
810 mono_threads_lock ();
813 mono_threads_unlock ();
816 if (threads_starting_up == NULL) {
817 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
818 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
820 mono_g_hash_table_insert (threads_starting_up, thread, thread);
821 mono_threads_unlock ();
823 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
824 if (!internal->start_notify) {
825 mono_threads_lock ();
826 mono_g_hash_table_remove (threads_starting_up, thread);
827 mono_threads_unlock ();
828 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
834 stack_size = default_stacksize_for_thread (internal);
836 /* Create suspended, so we can do some housekeeping before the thread
839 create_flags = CREATE_SUSPENDED;
841 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
842 stack_size, create_flags, &tid);
844 if (thread_handle == NULL) {
845 /* The thread couldn't be created, so set an exception */
846 mono_threads_lock ();
847 mono_g_hash_table_remove (threads_starting_up, thread);
848 mono_threads_unlock ();
850 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
853 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
855 internal->handle = thread_handle;
856 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
858 internal->threadpool_thread = threadpool_thread;
859 if (threadpool_thread)
860 mono_thread_set_state (internal, ThreadState_Background);
862 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
864 /* Only store the handle when the thread is about to be
865 * launched, to avoid the main thread deadlocking while trying
866 * to clean up a thread that will never be signalled.
868 if (!handle_store (thread, FALSE))
871 mono_thread_info_resume (tid);
873 if (internal->start_notify) {
875 * Wait for the thread to set up its TLS data etc, so
876 * theres no potential race condition if someone tries
877 * to look up the data believing the thread has
880 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
882 MONO_PREPARE_BLOCKING;
883 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
884 MONO_FINISH_BLOCKING;
886 CloseHandle (internal->start_notify);
887 internal->start_notify = NULL;
890 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
895 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
897 if (mono_thread_start_cb) {
898 mono_thread_start_cb (tid, stack_start, func);
902 void mono_threads_set_default_stacksize (guint32 stacksize)
904 default_stacksize = stacksize;
907 guint32 mono_threads_get_default_stacksize (void)
909 return default_stacksize;
913 * mono_thread_create_internal:
915 * ARG should not be a GC reference.
918 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
922 MonoInternalThread *internal;
923 StartInfo *start_info;
926 thread = create_thread_object (domain, &error);
927 mono_error_raise_exception (&error); /* FIXME don't raise here */
929 internal = create_internal_thread (&error);
930 mono_error_raise_exception (&error); /* FIXME don't raise here */
932 MONO_OBJECT_SETREF (thread, internal_thread, internal);
934 start_info = g_new0 (StartInfo, 1);
935 start_info->func = (guint32 (*)(void *))func;
936 start_info->obj = thread;
937 start_info->start_arg = arg;
939 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, &error);
941 mono_error_raise_exception (&error); /* FIXME don't raise here */
945 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
946 #ifndef MONO_CROSS_COMPILE
947 if (mono_check_corlib_version () == NULL)
948 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
955 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
957 mono_thread_create_internal (domain, func, arg, FALSE, 0);
961 mono_thread_attach (MonoDomain *domain)
964 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
965 mono_error_raise_exception (&error);
971 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
973 MonoThreadInfo *info;
974 MonoInternalThread *thread;
975 MonoThread *current_thread;
976 HANDLE thread_handle;
977 MonoNativeThreadId tid;
979 mono_error_init (error);
981 if ((thread = mono_thread_internal_current ())) {
982 if (domain != mono_domain_get ())
983 mono_domain_set (domain, TRUE);
984 /* Already attached */
985 return mono_thread_current ();
988 if (!mono_gc_register_thread (&domain)) {
989 g_error ("Thread %"G_GSIZE_FORMAT" calling into managed code is not registered with the GC. On UNIX, this can be fixed by #include-ing <gc.h> before <pthread.h> in the file containing the thread creation code.", mono_native_thread_id_get ());
992 thread = create_internal_thread (error);
993 if (!mono_error_ok (error))
996 thread_handle = mono_thread_info_open_handle ();
997 g_assert (thread_handle);
999 tid=mono_native_thread_id_get ();
1001 thread->handle = thread_handle;
1002 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
1003 thread->stack_ptr = &tid;
1005 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1007 info = mono_thread_info_current ();
1009 thread->thread_info = info;
1010 thread->small_id = info->small_id;
1012 current_thread = new_thread_with_internal (domain, thread, error);
1013 if (!mono_error_ok (error))
1016 if (!handle_store (current_thread, force_attach)) {
1017 /* Mono is shutting down, so just wait for the end */
1019 mono_thread_info_sleep (10000, NULL);
1022 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1024 SET_CURRENT_OBJECT (thread);
1025 mono_domain_set (domain, TRUE);
1027 thread_adjust_static_data (thread);
1029 init_root_domain_thread (thread, current_thread, error);
1030 return_val_if_nok (error, NULL);
1032 if (domain != mono_get_root_domain ())
1033 set_current_thread_for_domain (domain, thread, current_thread);
1036 if (mono_thread_attach_cb) {
1040 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1043 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1045 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1048 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1049 if (!info->tools_thread)
1050 // FIXME: Need a separate callback
1051 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1053 return current_thread;
1057 mono_thread_detach_internal (MonoInternalThread *thread)
1059 g_return_if_fail (thread != NULL);
1061 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1063 thread_cleanup (thread);
1065 SET_CURRENT_OBJECT (NULL);
1066 mono_domain_unset ();
1068 /* Don't need to CloseHandle this thread, even though we took a
1069 * reference in mono_thread_attach (), because the GC will do it
1070 * when the Thread object is finalised.
1075 mono_thread_detach (MonoThread *thread)
1078 mono_thread_detach_internal (thread->internal_thread);
1082 * mono_thread_detach_if_exiting:
1084 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1085 * This should be used at the end of embedding code which calls into managed code, and which
1086 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1089 mono_thread_detach_if_exiting (void)
1091 if (mono_thread_info_is_exiting ()) {
1092 MonoInternalThread *thread;
1094 thread = mono_thread_internal_current ();
1096 mono_thread_detach_internal (thread);
1097 mono_thread_info_detach ();
1105 MonoInternalThread *thread = mono_thread_internal_current ();
1107 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1109 thread_cleanup (thread);
1110 SET_CURRENT_OBJECT (NULL);
1111 mono_domain_unset ();
1113 /* we could add a callback here for embedders to use. */
1114 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1115 exit (mono_environment_exitcode_get ());
1116 mono_thread_info_exit ();
1120 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1123 MonoInternalThread *internal;
1125 internal = create_internal_thread (&error);
1126 mono_error_raise_exception (&error);
1128 internal->state = ThreadState_Unstarted;
1130 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1134 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1138 StartInfo *start_info;
1139 MonoInternalThread *internal;
1142 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1144 if (!this_obj->internal_thread)
1145 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1146 internal = this_obj->internal_thread;
1148 LOCK_THREAD (internal);
1150 if ((internal->state & ThreadState_Unstarted) == 0) {
1151 UNLOCK_THREAD (internal);
1152 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1156 if ((internal->state & ThreadState_Aborted) != 0) {
1157 UNLOCK_THREAD (internal);
1160 /* This is freed in start_wrapper */
1161 start_info = g_new0 (StartInfo, 1);
1162 start_info->func = NULL;
1163 start_info->start_arg = NULL;
1164 start_info->delegate = start;
1165 start_info->obj = this_obj;
1166 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1168 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1170 mono_error_cleanup (&error);
1171 UNLOCK_THREAD (internal);
1175 internal->state &= ~ThreadState_Unstarted;
1177 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1179 UNLOCK_THREAD (internal);
1180 return internal->handle;
1184 * This is called from the finalizer of the internal thread object.
1187 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1189 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1192 * Since threads keep a reference to their thread object while running, by the time this function is called,
1193 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1194 * when thread_cleanup () can be called after this.
1197 CloseHandle (thread);
1199 if (this_obj->synch_cs) {
1200 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1201 this_obj->synch_cs = NULL;
1202 mono_coop_mutex_destroy (synch_cs);
1206 if (this_obj->name) {
1207 void *name = this_obj->name;
1208 this_obj->name = NULL;
1214 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1217 MonoInternalThread *thread = mono_thread_internal_current ();
1219 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1221 mono_thread_current_check_pending_interrupt ();
1224 gboolean alerted = FALSE;
1226 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1228 res = mono_thread_info_sleep (ms, &alerted);
1230 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1233 MonoException* exc = mono_thread_execute_interruption ();
1235 mono_raise_exception (exc);
1247 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1252 ves_icall_System_Threading_Thread_GetDomainID (void)
1254 return mono_domain_get()->domain_id;
1258 ves_icall_System_Threading_Thread_Yield (void)
1260 return mono_thread_info_yield ();
1264 * mono_thread_get_name:
1266 * Return the name of the thread. NAME_LEN is set to the length of the name.
1267 * Return NULL if the thread has no name. The returned memory is owned by the
1271 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1275 LOCK_THREAD (this_obj);
1277 if (!this_obj->name) {
1281 *name_len = this_obj->name_len;
1282 res = g_new (gunichar2, this_obj->name_len);
1283 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1286 UNLOCK_THREAD (this_obj);
1292 * mono_thread_get_name_utf8:
1294 * Return the name of the thread in UTF-8.
1295 * Return NULL if the thread has no name.
1296 * The returned memory is owned by the caller.
1299 mono_thread_get_name_utf8 (MonoThread *thread)
1304 MonoInternalThread *internal = thread->internal_thread;
1305 if (internal == NULL)
1308 LOCK_THREAD (internal);
1310 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1312 UNLOCK_THREAD (internal);
1318 * mono_thread_get_managed_id:
1320 * Return the Thread.ManagedThreadId value of `thread`.
1321 * Returns -1 if `thread` is NULL.
1324 mono_thread_get_managed_id (MonoThread *thread)
1329 MonoInternalThread *internal = thread->internal_thread;
1330 if (internal == NULL)
1333 int32_t id = internal->managed_id;
1339 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1344 mono_error_init (&error);
1346 LOCK_THREAD (this_obj);
1348 if (!this_obj->name)
1351 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1353 UNLOCK_THREAD (this_obj);
1355 mono_error_raise_exception (&error);
1361 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed, MonoError *error)
1363 LOCK_THREAD (this_obj);
1365 mono_error_init (error);
1367 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1368 UNLOCK_THREAD (this_obj);
1370 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1373 if (this_obj->name) {
1374 g_free (this_obj->name);
1375 this_obj->name_len = 0;
1378 this_obj->name = g_new (gunichar2, mono_string_length (name));
1379 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1380 this_obj->name_len = mono_string_length (name);
1383 this_obj->name = NULL;
1386 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1388 UNLOCK_THREAD (this_obj);
1390 if (this_obj->name && this_obj->tid) {
1391 char *tname = mono_string_to_utf8 (name);
1392 mono_profiler_thread_name (this_obj->tid, tname);
1393 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1399 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1402 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1403 mono_error_set_pending_exception (&error);
1407 * ves_icall_System_Threading_Thread_GetPriority_internal:
1408 * @param this_obj: The MonoInternalThread on which to operate.
1410 * Gets the priority of the given thread.
1411 * @return: The priority of the given thread.
1414 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1417 MonoInternalThread *internal = this_obj->internal_thread;
1419 LOCK_THREAD (internal);
1420 priority = GetThreadPriority (internal->handle) + 2;
1421 UNLOCK_THREAD (internal);
1426 * ves_icall_System_Threading_Thread_SetPriority_internal:
1427 * @param this_obj: The MonoInternalThread on which to operate.
1428 * @param priority: The priority to set.
1430 * Sets the priority of the given thread.
1433 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1435 MonoInternalThread *internal = this_obj->internal_thread;
1437 LOCK_THREAD (internal);
1438 SetThreadPriority (internal->handle, priority - 2);
1439 UNLOCK_THREAD (internal);
1442 /* If the array is already in the requested domain, we just return it,
1443 otherwise we return a copy in that domain. */
1445 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1452 if (mono_object_domain (arr) == domain)
1455 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1456 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1461 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1463 return byte_array_to_domain (arr, mono_get_root_domain ());
1467 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1469 return byte_array_to_domain (arr, mono_domain_get ());
1473 mono_thread_current (void)
1476 MonoDomain *domain = mono_domain_get ();
1477 MonoInternalThread *internal = mono_thread_internal_current ();
1478 MonoThread **current_thread_ptr;
1480 g_assert (internal);
1481 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1483 if (!*current_thread_ptr) {
1484 g_assert (domain != mono_get_root_domain ());
1485 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1486 mono_error_raise_exception (&error); /* FIXME don't raise here */
1488 return *current_thread_ptr;
1491 /* Return the thread object belonging to INTERNAL in the current domain */
1493 mono_thread_current_for_thread (MonoInternalThread *internal)
1496 MonoDomain *domain = mono_domain_get ();
1497 MonoThread **current_thread_ptr;
1499 g_assert (internal);
1500 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1502 if (!*current_thread_ptr) {
1503 g_assert (domain != mono_get_root_domain ());
1504 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1505 mono_error_raise_exception (&error); /* FIXME don't raise here */
1507 return *current_thread_ptr;
1511 mono_thread_internal_current (void)
1513 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1514 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1519 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1521 MonoInternalThread *thread = this_obj->internal_thread;
1522 HANDLE handle = thread->handle;
1523 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1526 mono_thread_current_check_pending_interrupt ();
1528 LOCK_THREAD (thread);
1530 if ((thread->state & ThreadState_Unstarted) != 0) {
1531 UNLOCK_THREAD (thread);
1533 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1537 UNLOCK_THREAD (thread);
1542 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1544 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1546 MONO_PREPARE_BLOCKING;
1547 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1548 MONO_FINISH_BLOCKING;
1550 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1552 if(ret==WAIT_OBJECT_0) {
1553 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1558 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1564 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1572 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1574 MONO_PREPARE_BLOCKING;
1576 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1578 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1579 MONO_FINISH_BLOCKING;
1581 if (ret != WAIT_IO_COMPLETION)
1584 exc = mono_thread_execute_interruption ();
1586 mono_raise_exception (exc);
1591 /* Re-calculate ms according to the time passed */
1592 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1593 if (diff_ms >= ms) {
1597 wait = ms - diff_ms;
1603 /* FIXME: exitContext isnt documented */
1604 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1610 MonoObject *waitHandle;
1611 MonoInternalThread *thread = mono_thread_internal_current ();
1613 /* Do this WaitSleepJoin check before creating objects */
1614 mono_thread_current_check_pending_interrupt ();
1616 /* We fail in managed if the array has more than 64 elements */
1617 numhandles = (guint32)mono_array_length(mono_handles);
1618 handles = g_new0(HANDLE, numhandles);
1620 for(i = 0; i < numhandles; i++) {
1621 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1622 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1629 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1631 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1633 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1637 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1638 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1641 /* FIXME: exitContext isnt documented */
1642 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1644 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1645 uintptr_t numhandles;
1648 MonoObject *waitHandle;
1649 MonoInternalThread *thread = mono_thread_internal_current ();
1651 /* Do this WaitSleepJoin check before creating objects */
1652 mono_thread_current_check_pending_interrupt ();
1654 numhandles = mono_array_length(mono_handles);
1655 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1658 for(i = 0; i < numhandles; i++) {
1659 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1660 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1667 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1669 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1671 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1673 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1676 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1678 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1679 return ret - WAIT_OBJECT_0;
1681 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1682 return ret - WAIT_ABANDONED_0;
1685 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1686 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1690 /* FIXME: exitContext isnt documented */
1691 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms, gboolean exitContext)
1694 MonoInternalThread *thread = mono_thread_internal_current ();
1696 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1702 mono_thread_current_check_pending_interrupt ();
1704 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1706 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1708 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1710 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1711 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1715 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1718 MonoInternalThread *thread = mono_thread_internal_current ();
1723 mono_thread_current_check_pending_interrupt ();
1725 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1727 MONO_PREPARE_BLOCKING;
1728 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1729 MONO_FINISH_BLOCKING;
1731 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1733 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1734 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1737 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1744 mutex = CreateMutex (NULL, owned, NULL);
1746 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1748 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1756 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1757 return(ReleaseMutex (handle));
1760 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1766 *error = ERROR_SUCCESS;
1768 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1770 *error = GetLastError ();
1777 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1784 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1786 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1787 mono_string_chars (name));
1789 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1797 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1801 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1806 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1810 *error = ERROR_SUCCESS;
1812 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1814 *error = GetLastError ();
1820 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1827 event = CreateEvent (NULL, manual, initial, NULL);
1829 event = CreateEvent (NULL, manual, initial,
1830 mono_string_chars (name));
1832 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1840 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1841 return (SetEvent(handle));
1844 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1845 return (ResetEvent(handle));
1849 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1850 CloseHandle (handle);
1853 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1859 *error = ERROR_SUCCESS;
1861 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1863 *error = GetLastError ();
1869 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1871 return InterlockedIncrement (location);
1874 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1876 #if SIZEOF_VOID_P == 4
1877 if (G_UNLIKELY ((size_t)location & 0x7)) {
1879 mono_interlocked_lock ();
1882 mono_interlocked_unlock ();
1886 return InterlockedIncrement64 (location);
1889 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1891 return InterlockedDecrement(location);
1894 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1896 #if SIZEOF_VOID_P == 4
1897 if (G_UNLIKELY ((size_t)location & 0x7)) {
1899 mono_interlocked_lock ();
1902 mono_interlocked_unlock ();
1906 return InterlockedDecrement64 (location);
1909 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1911 return InterlockedExchange(location, value);
1914 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1917 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1918 mono_gc_wbarrier_generic_nostore (location);
1922 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1924 return InterlockedExchangePointer(location, value);
1927 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1929 IntFloatUnion val, ret;
1932 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1938 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1940 #if SIZEOF_VOID_P == 4
1941 if (G_UNLIKELY ((size_t)location & 0x7)) {
1943 mono_interlocked_lock ();
1946 mono_interlocked_unlock ();
1950 return InterlockedExchange64 (location, value);
1954 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1956 LongDoubleUnion val, ret;
1959 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1964 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1966 return InterlockedCompareExchange(location, value, comparand);
1969 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1971 gint32 r = InterlockedCompareExchange(location, value, comparand);
1972 *success = r == comparand;
1976 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1979 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1980 mono_gc_wbarrier_generic_nostore (location);
1984 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1986 return InterlockedCompareExchangePointer(location, value, comparand);
1989 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1991 IntFloatUnion val, ret, cmp;
1994 cmp.fval = comparand;
1995 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2001 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2003 #if SIZEOF_VOID_P == 8
2004 LongDoubleUnion val, comp, ret;
2007 comp.fval = comparand;
2008 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2014 mono_interlocked_lock ();
2016 if (old == comparand)
2018 mono_interlocked_unlock ();
2025 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2027 #if SIZEOF_VOID_P == 4
2028 if (G_UNLIKELY ((size_t)location & 0x7)) {
2030 mono_interlocked_lock ();
2032 if (old == comparand)
2034 mono_interlocked_unlock ();
2038 return InterlockedCompareExchange64 (location, value, comparand);
2042 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2045 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2046 mono_gc_wbarrier_generic_nostore (location);
2051 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2054 MONO_CHECK_NULL (location, NULL);
2055 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2056 mono_gc_wbarrier_generic_nostore (location);
2061 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2063 return InterlockedAdd (location, value);
2067 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2069 #if SIZEOF_VOID_P == 4
2070 if (G_UNLIKELY ((size_t)location & 0x7)) {
2072 mono_interlocked_lock ();
2075 mono_interlocked_unlock ();
2079 return InterlockedAdd64 (location, value);
2083 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2085 #if SIZEOF_VOID_P == 4
2086 if (G_UNLIKELY ((size_t)location & 0x7)) {
2088 mono_interlocked_lock ();
2090 mono_interlocked_unlock ();
2094 return InterlockedRead64 (location);
2098 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2100 mono_memory_barrier ();
2104 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2106 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2108 if (state & ThreadState_Background) {
2109 /* If the thread changes the background mode, the main thread has to
2110 * be notified, since it has to rebuild the list of threads to
2113 SetEvent (background_change_event);
2118 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2120 mono_thread_set_state (this_obj, (MonoThreadState)state);
2122 if (state & ThreadState_Background) {
2123 /* If the thread changes the background mode, the main thread has to
2124 * be notified, since it has to rebuild the list of threads to
2127 SetEvent (background_change_event);
2132 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2136 LOCK_THREAD (this_obj);
2138 state = this_obj->state;
2140 UNLOCK_THREAD (this_obj);
2145 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2147 MonoInternalThread *current;
2149 MonoInternalThread *thread = this_obj->internal_thread;
2151 LOCK_THREAD (thread);
2153 current = mono_thread_internal_current ();
2155 thread->thread_interrupt_requested = TRUE;
2156 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2158 UNLOCK_THREAD (thread);
2161 async_abort_internal (thread, FALSE);
2165 void mono_thread_current_check_pending_interrupt ()
2167 MonoInternalThread *thread = mono_thread_internal_current ();
2168 gboolean throw_ = FALSE;
2170 LOCK_THREAD (thread);
2172 if (thread->thread_interrupt_requested) {
2174 thread->thread_interrupt_requested = FALSE;
2177 UNLOCK_THREAD (thread);
2180 mono_raise_exception (mono_get_exception_thread_interrupted ());
2185 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2187 LOCK_THREAD (thread);
2189 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2190 (thread->state & ThreadState_StopRequested) != 0 ||
2191 (thread->state & ThreadState_Stopped) != 0)
2193 UNLOCK_THREAD (thread);
2197 if ((thread->state & ThreadState_Unstarted) != 0) {
2198 thread->state |= ThreadState_Aborted;
2199 UNLOCK_THREAD (thread);
2203 thread->state |= ThreadState_AbortRequested;
2204 if (thread->abort_state_handle)
2205 mono_gchandle_free (thread->abort_state_handle);
2207 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2208 g_assert (thread->abort_state_handle);
2210 thread->abort_state_handle = 0;
2212 thread->abort_exc = NULL;
2214 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));
2216 /* During shutdown, we can't wait for other threads */
2218 /* Make sure the thread is awake */
2219 mono_thread_resume (thread);
2221 UNLOCK_THREAD (thread);
2223 if (thread == mono_thread_internal_current ())
2224 self_abort_internal ();
2226 async_abort_internal (thread, TRUE);
2230 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2232 MonoInternalThread *thread = mono_thread_internal_current ();
2233 gboolean was_aborting;
2235 LOCK_THREAD (thread);
2236 was_aborting = thread->state & ThreadState_AbortRequested;
2237 thread->state &= ~ThreadState_AbortRequested;
2238 UNLOCK_THREAD (thread);
2240 if (!was_aborting) {
2241 const char *msg = "Unable to reset abort because no abort was requested";
2242 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2245 thread->abort_exc = NULL;
2246 if (thread->abort_state_handle) {
2247 mono_gchandle_free (thread->abort_state_handle);
2248 /* This is actually not necessary - the handle
2249 only counts if the exception is set */
2250 thread->abort_state_handle = 0;
2255 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2257 LOCK_THREAD (thread);
2259 thread->state &= ~ThreadState_AbortRequested;
2261 if (thread->abort_exc) {
2262 thread->abort_exc = NULL;
2263 if (thread->abort_state_handle) {
2264 mono_gchandle_free (thread->abort_state_handle);
2265 /* This is actually not necessary - the handle
2266 only counts if the exception is set */
2267 thread->abort_state_handle = 0;
2271 UNLOCK_THREAD (thread);
2275 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2277 MonoInternalThread *thread = this_obj->internal_thread;
2278 MonoObject *state, *deserialized = NULL, *exc;
2281 if (!thread->abort_state_handle)
2284 state = mono_gchandle_get_target (thread->abort_state_handle);
2287 domain = mono_domain_get ();
2288 if (mono_object_domain (state) == domain)
2291 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2293 if (!deserialized) {
2294 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2296 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2297 mono_set_pending_exception (invalid_op_exc);
2301 return deserialized;
2305 mono_thread_suspend (MonoInternalThread *thread)
2307 LOCK_THREAD (thread);
2309 if ((thread->state & ThreadState_Unstarted) != 0 ||
2310 (thread->state & ThreadState_Aborted) != 0 ||
2311 (thread->state & ThreadState_Stopped) != 0)
2313 UNLOCK_THREAD (thread);
2317 if ((thread->state & ThreadState_Suspended) != 0 ||
2318 (thread->state & ThreadState_SuspendRequested) != 0 ||
2319 (thread->state & ThreadState_StopRequested) != 0)
2321 UNLOCK_THREAD (thread);
2325 thread->state |= ThreadState_SuspendRequested;
2327 if (thread == mono_thread_internal_current ()) {
2328 /* calls UNLOCK_THREAD (thread) */
2329 self_suspend_internal ();
2331 /* calls UNLOCK_THREAD (thread) */
2332 async_suspend_internal (thread, FALSE);
2339 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2341 if (!mono_thread_suspend (this_obj->internal_thread)) {
2342 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2347 /* LOCKING: LOCK_THREAD(thread) must be held */
2349 mono_thread_resume (MonoInternalThread *thread)
2351 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2352 thread->state &= ~ThreadState_SuspendRequested;
2356 if ((thread->state & ThreadState_Suspended) == 0 ||
2357 (thread->state & ThreadState_Unstarted) != 0 ||
2358 (thread->state & ThreadState_Aborted) != 0 ||
2359 (thread->state & ThreadState_Stopped) != 0)
2364 UNLOCK_THREAD (thread);
2366 /* Awake the thread */
2367 if (!mono_thread_info_resume (thread_get_tid (thread)))
2370 LOCK_THREAD (thread);
2372 thread->state &= ~ThreadState_Suspended;
2378 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2380 if (!thread->internal_thread) {
2381 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2383 LOCK_THREAD (thread->internal_thread);
2384 if (!mono_thread_resume (thread->internal_thread))
2385 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2386 UNLOCK_THREAD (thread->internal_thread);
2391 mono_threads_is_critical_method (MonoMethod *method)
2393 switch (method->wrapper_type) {
2394 case MONO_WRAPPER_RUNTIME_INVOKE:
2395 case MONO_WRAPPER_XDOMAIN_INVOKE:
2396 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2403 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2408 if (mono_threads_is_critical_method (m)) {
2409 *((gboolean*)data) = TRUE;
2416 is_running_protected_wrapper (void)
2418 gboolean found = FALSE;
2419 mono_stack_walk (find_wrapper, &found);
2423 void mono_thread_internal_stop (MonoInternalThread *thread)
2425 LOCK_THREAD (thread);
2427 if ((thread->state & ThreadState_StopRequested) != 0 ||
2428 (thread->state & ThreadState_Stopped) != 0)
2430 UNLOCK_THREAD (thread);
2434 /* Make sure the thread is awake */
2435 mono_thread_resume (thread);
2437 thread->state |= ThreadState_StopRequested;
2438 thread->state &= ~ThreadState_AbortRequested;
2440 UNLOCK_THREAD (thread);
2442 if (thread == mono_thread_internal_current ())
2443 self_abort_internal ();
2445 async_abort_internal (thread, TRUE);
2448 void mono_thread_stop (MonoThread *thread)
2450 mono_thread_internal_stop (thread->internal_thread);
2454 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2456 gint8 tmp = *(volatile gint8 *)ptr;
2457 mono_memory_barrier ();
2462 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2464 gint16 tmp = *(volatile gint16 *)ptr;
2465 mono_memory_barrier ();
2470 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2472 gint32 tmp = *(volatile gint32 *)ptr;
2473 mono_memory_barrier ();
2478 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2480 gint64 tmp = *(volatile gint64 *)ptr;
2481 mono_memory_barrier ();
2486 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2488 volatile void *tmp = *(volatile void **)ptr;
2489 mono_memory_barrier ();
2490 return (void *) tmp;
2494 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2496 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2497 mono_memory_barrier ();
2498 return (MonoObject *) tmp;
2502 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2504 double tmp = *(volatile double *)ptr;
2505 mono_memory_barrier ();
2510 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2512 float tmp = *(volatile float *)ptr;
2513 mono_memory_barrier ();
2518 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2520 return InterlockedRead8 ((volatile gint8 *)ptr);
2524 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2526 return InterlockedRead16 ((volatile gint16 *)ptr);
2530 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2532 return InterlockedRead ((volatile gint32 *)ptr);
2536 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2538 #if SIZEOF_VOID_P == 4
2539 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2541 mono_interlocked_lock ();
2542 val = *(gint64*)ptr;
2543 mono_interlocked_unlock ();
2547 return InterlockedRead64 ((volatile gint64 *)ptr);
2551 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2553 return InterlockedReadPointer ((volatile gpointer *)ptr);
2557 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2561 #if SIZEOF_VOID_P == 4
2562 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2564 mono_interlocked_lock ();
2565 val = *(double*)ptr;
2566 mono_interlocked_unlock ();
2571 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2577 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2581 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2587 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2589 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2593 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2595 mono_memory_barrier ();
2596 *(volatile gint8 *)ptr = value;
2600 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2602 mono_memory_barrier ();
2603 *(volatile gint16 *)ptr = value;
2607 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2609 mono_memory_barrier ();
2610 *(volatile gint32 *)ptr = value;
2614 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2616 mono_memory_barrier ();
2617 *(volatile gint64 *)ptr = value;
2621 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2623 mono_memory_barrier ();
2624 *(volatile void **)ptr = value;
2628 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2630 mono_memory_barrier ();
2631 mono_gc_wbarrier_generic_store (ptr, value);
2635 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2637 mono_memory_barrier ();
2638 *(volatile double *)ptr = value;
2642 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2644 mono_memory_barrier ();
2645 *(volatile float *)ptr = value;
2649 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2651 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2655 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2657 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2661 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2663 InterlockedWrite ((volatile gint32 *)ptr, value);
2667 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2669 #if SIZEOF_VOID_P == 4
2670 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2671 mono_interlocked_lock ();
2672 *(gint64*)ptr = value;
2673 mono_interlocked_unlock ();
2678 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2682 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2684 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2688 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2692 #if SIZEOF_VOID_P == 4
2693 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2694 mono_interlocked_lock ();
2695 *(double*)ptr = value;
2696 mono_interlocked_unlock ();
2703 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2707 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2713 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2717 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2719 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2723 free_context (void *user_data)
2725 ContextStaticData *data = user_data;
2727 mono_threads_lock ();
2730 * There is no guarantee that, by the point this reference queue callback
2731 * has been invoked, the GC handle associated with the object will fail to
2732 * resolve as one might expect. So if we don't free and remove the GC
2733 * handle here, free_context_static_data_helper () could end up resolving
2734 * a GC handle to an actually-dead context which would contain a pointer
2735 * to an already-freed static data segment, resulting in a crash when
2738 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2740 mono_threads_unlock ();
2742 mono_gchandle_free (data->gc_handle);
2743 mono_free_static_data (data->static_data);
2748 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2750 mono_threads_lock ();
2752 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2755 contexts = g_hash_table_new (NULL, NULL);
2758 context_queue = mono_gc_reference_queue_new (free_context);
2760 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2761 g_hash_table_insert (contexts, gch, gch);
2764 * We use this intermediate structure to contain a duplicate pointer to
2765 * the static data because we can't rely on being able to resolve the GC
2766 * handle in the reference queue callback.
2768 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2769 data->gc_handle = GPOINTER_TO_UINT (gch);
2772 context_adjust_static_data (ctx);
2773 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2775 mono_threads_unlock ();
2777 mono_profiler_context_loaded (ctx);
2781 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2784 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2785 * cleanup in exceptional circumstances, we don't actually do any
2786 * cleanup work here. We instead do this via a reference queue.
2789 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2791 mono_profiler_context_unloaded (ctx);
2795 mono_thread_init_tls (void)
2797 MONO_FAST_TLS_INIT (tls_current_object);
2798 mono_native_tls_alloc (¤t_object_key, NULL);
2801 void mono_thread_init (MonoThreadStartCB start_cb,
2802 MonoThreadAttachCB attach_cb)
2804 mono_coop_mutex_init_recursive (&threads_mutex);
2806 mono_os_mutex_init_recursive(&interlocked_mutex);
2807 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2809 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2810 g_assert(background_change_event != NULL);
2812 mono_init_static_data_info (&thread_static_info);
2813 mono_init_static_data_info (&context_static_info);
2815 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2817 mono_thread_start_cb = start_cb;
2818 mono_thread_attach_cb = attach_cb;
2820 /* Get a pseudo handle to the current process. This is just a
2821 * kludge so that wapi can build a process handle if needed.
2822 * As a pseudo handle is returned, we don't need to clean
2825 GetCurrentProcess ();
2828 void mono_thread_cleanup (void)
2830 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2831 MonoThreadInfo *info;
2833 /* The main thread must abandon any held mutexes (particularly
2834 * important for named mutexes as they are shared across
2835 * processes, see bug 74680.) This will happen when the
2836 * thread exits, but if it's not running in a subthread it
2837 * won't exit in time.
2839 info = mono_thread_info_current ();
2840 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2844 /* This stuff needs more testing, it seems one of these
2845 * critical sections can be locked when mono_thread_cleanup is
2848 mono_coop_mutex_destroy (&threads_mutex);
2849 mono_os_mutex_destroy (&interlocked_mutex);
2850 mono_os_mutex_destroy (&delayed_free_table_mutex);
2851 mono_os_mutex_destroy (&small_id_mutex);
2852 CloseHandle (background_change_event);
2855 mono_native_tls_free (current_object_key);
2859 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2861 mono_thread_cleanup_fn = func;
2865 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2867 thread->internal_thread->manage_callback = func;
2871 static void print_tids (gpointer key, gpointer value, gpointer user)
2873 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2874 * sizeof(uint) and a cast to uint would overflow
2876 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2877 * print this as a pointer.
2879 g_message ("Waiting for: %p", key);
2884 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2885 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2889 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2893 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2895 MONO_PREPARE_BLOCKING;
2896 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2897 MONO_FINISH_BLOCKING;
2899 if(ret==WAIT_FAILED) {
2900 /* See the comment in build_wait_tids() */
2901 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2905 for(i=0; i<wait->num; i++)
2906 CloseHandle (wait->handles[i]);
2908 if (ret == WAIT_TIMEOUT)
2911 for(i=0; i<wait->num; i++) {
2912 gsize tid = wait->threads[i]->tid;
2915 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2916 * it can still run io-layer etc. code. So wait for it to really exit.
2917 * FIXME: This won't join threads which are not in the joinable_hash yet.
2919 mono_thread_join ((gpointer)tid);
2921 mono_threads_lock ();
2922 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2923 /* This thread must have been killed, because
2924 * it hasn't cleaned itself up. (It's just
2925 * possible that the thread exited before the
2926 * parent thread had a chance to store the
2927 * handle, and now there is another pointer to
2928 * the already-exited thread stored. In this
2929 * case, we'll just get two
2930 * mono_profiler_thread_end() calls for the
2934 mono_threads_unlock ();
2935 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2936 thread_cleanup (wait->threads[i]);
2938 mono_threads_unlock ();
2943 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2945 guint32 i, ret, count;
2947 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2949 /* Add the thread state change event, so it wakes up if a thread changes
2950 * to background mode.
2953 if (count < MAXIMUM_WAIT_OBJECTS) {
2954 wait->handles [count] = background_change_event;
2958 MONO_PREPARE_BLOCKING;
2959 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2960 MONO_FINISH_BLOCKING;
2962 if(ret==WAIT_FAILED) {
2963 /* See the comment in build_wait_tids() */
2964 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2968 for(i=0; i<wait->num; i++)
2969 CloseHandle (wait->handles[i]);
2971 if (ret == WAIT_TIMEOUT)
2974 if (ret < wait->num) {
2975 gsize tid = wait->threads[ret]->tid;
2976 mono_threads_lock ();
2977 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2978 /* See comment in wait_for_tids about thread cleanup */
2979 mono_threads_unlock ();
2980 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2981 thread_cleanup (wait->threads [ret]);
2983 mono_threads_unlock ();
2987 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2989 struct wait_data *wait=(struct wait_data *)user;
2991 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2993 MonoInternalThread *thread=(MonoInternalThread *)value;
2995 /* Ignore background threads, we abort them later */
2996 /* Do not lock here since it is not needed and the caller holds threads_lock */
2997 if (thread->state & ThreadState_Background) {
2998 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2999 return; /* just leave, ignore */
3002 if (mono_gc_is_finalizer_internal_thread (thread)) {
3003 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3007 if (thread == mono_thread_internal_current ()) {
3008 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3012 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3013 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3017 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3018 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3022 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3023 if (handle == NULL) {
3024 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3028 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3029 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3030 wait->handles[wait->num]=handle;
3031 wait->threads[wait->num]=thread;
3034 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3036 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3041 /* Just ignore the rest, we can't do anything with
3048 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3050 struct wait_data *wait=(struct wait_data *)user;
3051 MonoNativeThreadId self = mono_native_thread_id_get ();
3052 MonoInternalThread *thread = (MonoInternalThread *)value;
3055 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3058 /* The finalizer thread is not a background thread */
3059 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3060 && (thread->state & ThreadState_Background) != 0
3061 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3063 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3067 /* printf ("A: %d\n", wait->num); */
3068 wait->handles[wait->num]=thread->handle;
3069 wait->threads[wait->num]=thread;
3072 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3073 mono_thread_internal_stop (thread);
3077 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3078 && !mono_gc_is_finalizer_internal_thread (thread);
3082 * mono_threads_set_shutting_down:
3084 * Is called by a thread that wants to shut down Mono. If the runtime is already
3085 * shutting down, the calling thread is suspended/stopped, and this function never
3089 mono_threads_set_shutting_down (void)
3091 MonoInternalThread *current_thread = mono_thread_internal_current ();
3093 mono_threads_lock ();
3095 if (shutting_down) {
3096 mono_threads_unlock ();
3098 /* Make sure we're properly suspended/stopped */
3100 LOCK_THREAD (current_thread);
3102 if ((current_thread->state & ThreadState_SuspendRequested) ||
3103 (current_thread->state & ThreadState_AbortRequested) ||
3104 (current_thread->state & ThreadState_StopRequested)) {
3105 UNLOCK_THREAD (current_thread);
3106 mono_thread_execute_interruption ();
3108 current_thread->state |= ThreadState_Stopped;
3109 UNLOCK_THREAD (current_thread);
3112 /*since we're killing the thread, unset the current domain.*/
3113 mono_domain_unset ();
3115 /* Wake up other threads potentially waiting for us */
3116 mono_thread_info_exit ();
3118 shutting_down = TRUE;
3120 /* Not really a background state change, but this will
3121 * interrupt the main thread if it is waiting for all
3122 * the other threads.
3124 SetEvent (background_change_event);
3126 mono_threads_unlock ();
3130 void mono_thread_manage (void)
3132 struct wait_data wait_data;
3133 struct wait_data *wait = &wait_data;
3135 memset (wait, 0, sizeof (struct wait_data));
3136 /* join each thread that's still running */
3137 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3139 mono_threads_lock ();
3141 THREAD_DEBUG (g_message("%s: No threads", __func__));
3142 mono_threads_unlock ();
3145 mono_threads_unlock ();
3148 mono_threads_lock ();
3149 if (shutting_down) {
3150 /* somebody else is shutting down */
3151 mono_threads_unlock ();
3154 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3155 mono_g_hash_table_foreach (threads, print_tids, NULL));
3157 ResetEvent (background_change_event);
3159 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3160 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3161 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3162 mono_threads_unlock ();
3164 /* Something to wait for */
3165 wait_for_tids_or_state_change (wait, INFINITE);
3167 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3168 } while(wait->num>0);
3170 /* Mono is shutting down, so just wait for the end */
3171 if (!mono_runtime_try_shutdown ()) {
3172 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3173 mono_thread_suspend (mono_thread_internal_current ());
3174 mono_thread_execute_interruption ();
3178 * Remove everything but the finalizer thread and self.
3179 * Also abort all the background threads
3182 mono_threads_lock ();
3185 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3186 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3187 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3189 mono_threads_unlock ();
3191 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3193 /* Something to wait for */
3194 wait_for_tids (wait, INFINITE);
3196 } while (wait->num > 0);
3199 * give the subthreads a chance to really quit (this is mainly needed
3200 * to get correct user and system times from getrusage/wait/time(1)).
3201 * This could be removed if we avoid pthread_detach() and use pthread_join().
3203 mono_thread_info_yield ();
3207 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3209 MonoInternalThread *thread = (MonoInternalThread*)value;
3210 struct wait_data *wait = (struct wait_data*)user_data;
3214 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3216 * This needs no locking.
3218 if ((thread->state & ThreadState_Suspended) != 0 ||
3219 (thread->state & ThreadState_Stopped) != 0)
3222 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3223 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3227 wait->handles [wait->num] = handle;
3228 wait->threads [wait->num] = thread;
3234 * mono_thread_suspend_all_other_threads:
3236 * Suspend all managed threads except the finalizer thread and this thread. It is
3237 * not possible to resume them later.
3239 void mono_thread_suspend_all_other_threads (void)
3241 struct wait_data wait_data;
3242 struct wait_data *wait = &wait_data;
3244 MonoNativeThreadId self = mono_native_thread_id_get ();
3245 guint32 eventidx = 0;
3246 gboolean starting, finished;
3248 memset (wait, 0, sizeof (struct wait_data));
3250 * The other threads could be in an arbitrary state at this point, i.e.
3251 * they could be starting up, shutting down etc. This means that there could be
3252 * threads which are not even in the threads hash table yet.
3256 * First we set a barrier which will be checked by all threads before they
3257 * are added to the threads hash table, and they will exit if the flag is set.
3258 * This ensures that no threads could be added to the hash later.
3259 * We will use shutting_down as the barrier for now.
3261 g_assert (shutting_down);
3264 * We make multiple calls to WaitForMultipleObjects since:
3265 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3266 * - some threads could exit without becoming suspended
3271 * Make a copy of the hashtable since we can't do anything with
3272 * threads while threads_mutex is held.
3275 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3276 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3277 mono_threads_lock ();
3278 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3279 mono_threads_unlock ();
3282 /* Get the suspended events that we'll be waiting for */
3283 for (i = 0; i < wait->num; ++i) {
3284 MonoInternalThread *thread = wait->threads [i];
3286 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3287 || mono_gc_is_finalizer_internal_thread (thread)
3288 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3290 //CloseHandle (wait->handles [i]);
3291 wait->threads [i] = NULL; /* ignore this thread in next loop */
3295 LOCK_THREAD (thread);
3297 if ((thread->state & ThreadState_Suspended) != 0 ||
3298 (thread->state & ThreadState_StopRequested) != 0 ||
3299 (thread->state & ThreadState_Stopped) != 0) {
3300 UNLOCK_THREAD (thread);
3301 CloseHandle (wait->handles [i]);
3302 wait->threads [i] = NULL; /* ignore this thread in next loop */
3308 /* Convert abort requests into suspend requests */
3309 if ((thread->state & ThreadState_AbortRequested) != 0)
3310 thread->state &= ~ThreadState_AbortRequested;
3312 thread->state |= ThreadState_SuspendRequested;
3314 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3315 async_suspend_internal (thread, TRUE);
3317 if (eventidx <= 0) {
3319 * If there are threads which are starting up, we wait until they
3320 * are suspended when they try to register in the threads hash.
3321 * This is guaranteed to finish, since the threads which can create new
3322 * threads get suspended after a while.
3323 * FIXME: The finalizer thread can still create new threads.
3325 mono_threads_lock ();
3326 if (threads_starting_up)
3327 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3330 mono_threads_unlock ();
3332 mono_thread_info_sleep (100, NULL);
3340 MonoInternalThread *thread;
3341 MonoStackFrameInfo *frames;
3342 int nframes, max_frames;
3343 int nthreads, max_threads;
3344 MonoInternalThread **threads;
3345 } ThreadDumpUserData;
3347 static gboolean thread_dump_requested;
3349 /* This needs to be async safe */
3351 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3353 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3355 if (ud->nframes < ud->max_frames) {
3356 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3363 /* This needs to be async safe */
3364 static SuspendThreadResult
3365 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3367 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3368 MonoInternalThread *thread = user_data->thread;
3371 /* This no longer works with remote unwinding */
3373 wapi_desc = wapi_current_thread_desc ();
3374 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3379 if (thread == mono_thread_internal_current ())
3380 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3382 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3384 return MonoResumeThread;
3388 int nthreads, max_threads;
3389 MonoInternalThread **threads;
3390 } CollectThreadsUserData;
3393 collect_thread (gpointer key, gpointer value, gpointer user)
3395 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3396 MonoInternalThread *thread = (MonoInternalThread *)value;
3398 if (ud->nthreads < ud->max_threads)
3399 ud->threads [ud->nthreads ++] = thread;
3403 * Collect running threads into the THREADS array.
3404 * THREADS should be an array allocated on the stack.
3407 collect_threads (MonoInternalThread **thread_array, int max_threads)
3409 CollectThreadsUserData ud;
3411 memset (&ud, 0, sizeof (ud));
3412 /* This array contains refs, but its on the stack, so its ok */
3413 ud.threads = thread_array;
3414 ud.max_threads = max_threads;
3416 mono_threads_lock ();
3417 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3418 mono_threads_unlock ();
3424 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3426 GString* text = g_string_new (0);
3428 GError *error = NULL;
3431 ud->thread = thread;
3434 /* Collect frames for the thread */
3435 if (thread == mono_thread_internal_current ()) {
3436 get_thread_dump (mono_thread_info_current (), ud);
3438 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3442 * Do all the non async-safe work outside of get_thread_dump.
3445 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3447 g_string_append_printf (text, "\n\"%s\"", name);
3450 else if (thread->threadpool_thread) {
3451 g_string_append (text, "\n\"<threadpool thread>\"");
3453 g_string_append (text, "\n\"<unnamed thread>\"");
3456 for (i = 0; i < ud->nframes; ++i) {
3457 MonoStackFrameInfo *frame = &ud->frames [i];
3458 MonoMethod *method = NULL;
3460 if (frame->type == FRAME_TYPE_MANAGED)
3461 method = mono_jit_info_get_method (frame->ji);
3464 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3465 g_string_append_printf (text, " %s\n", location);
3468 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3472 fprintf (stdout, "%s", text->str);
3474 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3475 OutputDebugStringA(text->str);
3478 g_string_free (text, TRUE);
3483 mono_threads_perform_thread_dump (void)
3485 ThreadDumpUserData ud;
3486 MonoInternalThread *thread_array [128];
3487 int tindex, nthreads;
3489 if (!thread_dump_requested)
3492 printf ("Full thread dump:\n");
3494 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3495 nthreads = collect_threads (thread_array, 128);
3497 memset (&ud, 0, sizeof (ud));
3498 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3499 ud.max_frames = 256;
3501 for (tindex = 0; tindex < nthreads; ++tindex)
3502 dump_thread (thread_array [tindex], &ud);
3506 thread_dump_requested = FALSE;
3509 /* Obtain the thread dump of all threads */
3511 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3515 ThreadDumpUserData ud;
3516 MonoInternalThread *thread_array [128];
3517 MonoDomain *domain = mono_domain_get ();
3518 MonoDebugSourceLocation *location;
3519 int tindex, nthreads;
3521 mono_error_init (&error);
3523 *out_threads = NULL;
3524 *out_stack_frames = NULL;
3526 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3527 nthreads = collect_threads (thread_array, 128);
3529 memset (&ud, 0, sizeof (ud));
3530 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3531 ud.max_frames = 256;
3533 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3534 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3536 for (tindex = 0; tindex < nthreads; ++tindex) {
3537 MonoInternalThread *thread = thread_array [tindex];
3538 MonoArray *thread_frames;
3544 /* Collect frames for the thread */
3545 if (thread == mono_thread_internal_current ()) {
3546 get_thread_dump (mono_thread_info_current (), &ud);
3548 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3551 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3553 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3554 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3556 for (i = 0; i < ud.nframes; ++i) {
3557 MonoStackFrameInfo *frame = &ud.frames [i];
3558 MonoMethod *method = NULL;
3559 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3560 if (!mono_error_ok (&error))
3563 sf->native_offset = frame->native_offset;
3565 if (frame->type == FRAME_TYPE_MANAGED)
3566 method = mono_jit_info_get_method (frame->ji);
3569 sf->method_address = (gsize) frame->ji->code_start;
3571 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3572 mono_error_raise_exception (&error); /* FIXME don't raise here */
3573 MONO_OBJECT_SETREF (sf, method, rm);
3575 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3577 sf->il_offset = location->il_offset;
3579 if (location && location->source_file) {
3580 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3581 sf->line = location->row;
3582 sf->column = location->column;
3584 mono_debug_free_source_location (location);
3589 mono_array_setref (thread_frames, i, sf);
3595 mono_error_raise_exception (&error); /* FIXME don't raise here */
3599 * mono_threads_request_thread_dump:
3601 * Ask all threads except the current to print their stacktrace to stdout.
3604 mono_threads_request_thread_dump (void)
3606 /*The new thread dump code runs out of the finalizer thread. */
3607 thread_dump_requested = TRUE;
3608 mono_gc_finalize_notify ();
3613 gint allocated; /* +1 so that refs [allocated] == NULL */
3617 typedef struct ref_stack RefStack;
3620 ref_stack_new (gint initial_size)
3624 initial_size = MAX (initial_size, 16) + 1;
3625 rs = g_new0 (RefStack, 1);
3626 rs->refs = g_new0 (gpointer, initial_size);
3627 rs->allocated = initial_size;
3632 ref_stack_destroy (gpointer ptr)
3634 RefStack *rs = (RefStack *)ptr;
3643 ref_stack_push (RefStack *rs, gpointer ptr)
3645 g_assert (rs != NULL);
3647 if (rs->bottom >= rs->allocated) {
3648 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3649 rs->allocated <<= 1;
3650 rs->refs [rs->allocated] = NULL;
3652 rs->refs [rs->bottom++] = ptr;
3656 ref_stack_pop (RefStack *rs)
3658 if (rs == NULL || rs->bottom == 0)
3662 rs->refs [rs->bottom] = NULL;
3666 ref_stack_find (RefStack *rs, gpointer ptr)
3673 for (refs = rs->refs; refs && *refs; refs++) {
3681 * mono_thread_push_appdomain_ref:
3683 * Register that the current thread may have references to objects in domain
3684 * @domain on its stack. Each call to this function should be paired with a
3685 * call to pop_appdomain_ref.
3688 mono_thread_push_appdomain_ref (MonoDomain *domain)
3690 MonoInternalThread *thread = mono_thread_internal_current ();
3693 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3694 SPIN_LOCK (thread->lock_thread_id);
3695 if (thread->appdomain_refs == NULL)
3696 thread->appdomain_refs = ref_stack_new (16);
3697 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3698 SPIN_UNLOCK (thread->lock_thread_id);
3703 mono_thread_pop_appdomain_ref (void)
3705 MonoInternalThread *thread = mono_thread_internal_current ();
3708 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3709 SPIN_LOCK (thread->lock_thread_id);
3710 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3711 SPIN_UNLOCK (thread->lock_thread_id);
3716 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3719 SPIN_LOCK (thread->lock_thread_id);
3720 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3721 SPIN_UNLOCK (thread->lock_thread_id);
3726 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3728 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3731 typedef struct abort_appdomain_data {
3732 struct wait_data wait;
3734 } abort_appdomain_data;
3737 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3739 MonoInternalThread *thread = (MonoInternalThread*)value;
3740 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3741 MonoDomain *domain = data->domain;
3743 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3744 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3746 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3747 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3750 data->wait.handles [data->wait.num] = handle;
3751 data->wait.threads [data->wait.num] = thread;
3754 /* Just ignore the rest, we can't do anything with
3762 * mono_threads_abort_appdomain_threads:
3764 * Abort threads which has references to the given appdomain.
3767 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3769 #ifdef __native_client__
3773 abort_appdomain_data user_data;
3775 int orig_timeout = timeout;
3778 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3780 start_time = mono_msec_ticks ();
3782 mono_threads_lock ();
3784 user_data.domain = domain;
3785 user_data.wait.num = 0;
3786 /* This shouldn't take any locks */
3787 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3788 mono_threads_unlock ();
3790 if (user_data.wait.num > 0) {
3791 /* Abort the threads outside the threads lock */
3792 for (i = 0; i < user_data.wait.num; ++i)
3793 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3796 * We should wait for the threads either to abort, or to leave the
3797 * domain. We can't do the latter, so we wait with a timeout.
3799 wait_for_tids (&user_data.wait, 100);
3802 /* Update remaining time */
3803 timeout -= mono_msec_ticks () - start_time;
3804 start_time = mono_msec_ticks ();
3806 if (orig_timeout != -1 && timeout < 0)
3809 while (user_data.wait.num > 0);
3811 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3817 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3819 MonoInternalThread *thread = (MonoInternalThread*)value;
3820 MonoDomain *domain = (MonoDomain*)user_data;
3823 /* No locking needed here */
3824 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3826 if (thread->cached_culture_info) {
3827 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3828 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3829 if (obj && obj->vtable->domain == domain)
3830 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3836 * mono_threads_clear_cached_culture:
3838 * Clear the cached_current_culture from all threads if it is in the
3842 mono_threads_clear_cached_culture (MonoDomain *domain)
3844 mono_threads_lock ();
3845 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3846 mono_threads_unlock ();
3850 * mono_thread_get_undeniable_exception:
3852 * Return an exception which needs to be raised when leaving a catch clause.
3853 * This is used for undeniable exception propagation.
3856 mono_thread_get_undeniable_exception (void)
3858 MonoInternalThread *thread = mono_thread_internal_current ();
3860 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3862 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3863 * exception if the thread no longer references a dying appdomain.
3865 thread->abort_exc->trace_ips = NULL;
3866 thread->abort_exc->stack_trace = NULL;
3867 return thread->abort_exc;
3873 #if MONO_SMALL_CONFIG
3874 #define NUM_STATIC_DATA_IDX 4
3875 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3879 #define NUM_STATIC_DATA_IDX 8
3880 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3881 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3885 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3886 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3889 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3891 gpointer *static_data = (gpointer *)addr;
3893 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3894 void **ptr = (void **)static_data [i];
3899 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3900 void **p = ptr + idx;
3903 mark_func ((MonoObject**)p, gc_data);
3909 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3911 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3915 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3917 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3921 * mono_alloc_static_data
3923 * Allocate memory blocks for storing threads or context static data
3926 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3928 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3931 gpointer* static_data = *static_data_ptr;
3933 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3934 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3936 if (mono_gc_user_markers_supported ()) {
3937 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3938 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3940 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3941 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3944 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3945 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3946 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3947 *static_data_ptr = static_data;
3948 static_data [0] = static_data;
3951 for (i = 1; i <= idx; ++i) {
3952 if (static_data [i])
3955 if (mono_gc_user_markers_supported ())
3956 static_data [i] = g_malloc0 (static_data_size [i]);
3958 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3959 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3960 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3965 mono_free_static_data (gpointer* static_data)
3968 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3969 gpointer p = static_data [i];
3973 * At this point, the static data pointer array is still registered with the
3974 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3975 * data. Freeing the individual arrays without first nulling their slots
3976 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3977 * such an already freed array. See bug #13813.
3979 static_data [i] = NULL;
3980 mono_memory_write_barrier ();
3981 if (mono_gc_user_markers_supported ())
3984 mono_gc_free_fixed (p);
3986 mono_gc_free_fixed (static_data);
3990 * mono_init_static_data_info
3992 * Initializes static data counters
3994 static void mono_init_static_data_info (StaticDataInfo *static_data)
3996 static_data->idx = 0;
3997 static_data->offset = 0;
3998 static_data->freelist = NULL;
4002 * mono_alloc_static_data_slot
4004 * Generates an offset for static data. static_data contains the counters
4005 * used to generate it.
4008 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4010 if (!static_data->idx && !static_data->offset) {
4012 * we use the first chunk of the first allocation also as
4013 * an array for the rest of the data
4015 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4017 static_data->offset += align - 1;
4018 static_data->offset &= ~(align - 1);
4019 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4020 static_data->idx ++;
4021 g_assert (size <= static_data_size [static_data->idx]);
4022 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4023 static_data->offset = 0;
4025 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4026 static_data->offset += size;
4031 * ensure thread static fields already allocated are valid for thread
4032 * This function is called when a thread is created or on thread attach.
4035 thread_adjust_static_data (MonoInternalThread *thread)
4037 mono_threads_lock ();
4038 if (thread_static_info.offset || thread_static_info.idx > 0) {
4039 /* get the current allocated size */
4040 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4041 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4043 mono_threads_unlock ();
4047 * LOCKING: requires that threads_mutex is held
4050 context_adjust_static_data (MonoAppContext *ctx)
4052 if (context_static_info.offset || context_static_info.idx > 0) {
4053 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4054 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4055 ctx->data->static_data = ctx->static_data;
4060 * LOCKING: requires that threads_mutex is held
4063 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4065 MonoInternalThread *thread = (MonoInternalThread *)value;
4066 guint32 offset = GPOINTER_TO_UINT (user);
4068 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4072 * LOCKING: requires that threads_mutex is held
4075 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4077 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4082 guint32 offset = GPOINTER_TO_UINT (user);
4083 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4084 ctx->data->static_data = ctx->static_data;
4087 static StaticDataFreeList*
4088 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4090 StaticDataFreeList* prev = NULL;
4091 StaticDataFreeList* tmp = static_data->freelist;
4093 if (tmp->size == size) {
4095 prev->next = tmp->next;
4097 static_data->freelist = tmp->next;
4106 #if SIZEOF_VOID_P == 4
4113 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4115 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4117 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4118 MonoBitSet *rb = sets [idx];
4119 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4120 offset /= sizeof (uintptr_t);
4121 /* offset is now the bitmap offset */
4122 for (int i = 0; i < numbits; ++i) {
4123 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4124 mono_bitset_set_fast (rb, offset + i);
4129 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4131 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4132 MonoBitSet *rb = sets [idx];
4133 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4134 offset /= sizeof (uintptr_t);
4135 /* offset is now the bitmap offset */
4136 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4137 mono_bitset_clear_fast (rb, offset + i);
4141 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4143 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4145 StaticDataInfo *info;
4148 if (static_type == SPECIAL_STATIC_THREAD) {
4149 info = &thread_static_info;
4150 sets = thread_reference_bitmaps;
4152 info = &context_static_info;
4153 sets = context_reference_bitmaps;
4156 mono_threads_lock ();
4158 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4162 offset = item->offset;
4165 offset = mono_alloc_static_data_slot (info, size, align);
4168 update_reference_bitmap (sets, offset, bitmap, numbits);
4170 if (static_type == SPECIAL_STATIC_THREAD) {
4171 /* This can be called during startup */
4172 if (threads != NULL)
4173 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4175 if (contexts != NULL)
4176 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4178 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4181 mono_threads_unlock ();
4187 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4189 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4191 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4192 return get_thread_static_data (thread, offset);
4194 return get_context_static_data (thread->current_appcontext, offset);
4199 mono_get_special_static_data (guint32 offset)
4201 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4210 * LOCKING: requires that threads_mutex is held
4213 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4215 MonoInternalThread *thread = (MonoInternalThread *)value;
4216 OffsetSize *data = (OffsetSize *)user;
4217 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4218 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4221 if (!thread->static_data || !thread->static_data [idx])
4223 ptr = ((char*) thread->static_data [idx]) + off;
4224 mono_gc_bzero_atomic (ptr, data->size);
4228 * LOCKING: requires that threads_mutex is held
4231 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4233 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4238 OffsetSize *data = (OffsetSize *)user;
4239 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4240 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4243 if (!ctx->static_data || !ctx->static_data [idx])
4246 ptr = ((char*) ctx->static_data [idx]) + off;
4247 mono_gc_bzero_atomic (ptr, data->size);
4251 do_free_special_slot (guint32 offset, guint32 size)
4253 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4255 StaticDataInfo *info;
4257 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4258 info = &thread_static_info;
4259 sets = thread_reference_bitmaps;
4261 info = &context_static_info;
4262 sets = context_reference_bitmaps;
4265 guint32 data_offset = offset;
4266 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4267 OffsetSize data = { data_offset, size };
4269 clear_reference_bitmap (sets, data.offset, data.size);
4271 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4272 if (threads != NULL)
4273 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4275 if (contexts != NULL)
4276 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4279 if (!mono_runtime_is_shutting_down ()) {
4280 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4282 item->offset = offset;
4285 item->next = info->freelist;
4286 info->freelist = item;
4291 do_free_special (gpointer key, gpointer value, gpointer data)
4293 MonoClassField *field = (MonoClassField *)key;
4294 guint32 offset = GPOINTER_TO_UINT (value);
4297 size = mono_type_size (field->type, &align);
4298 do_free_special_slot (offset, size);
4302 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4304 mono_threads_lock ();
4306 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4308 mono_threads_unlock ();
4312 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4314 /* Only ever called for ThreadLocal instances */
4315 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4317 mono_threads_lock ();
4318 do_free_special_slot (offset, size);
4319 mono_threads_unlock ();
4323 static void CALLBACK dummy_apc (ULONG_PTR param)
4329 * mono_thread_execute_interruption
4331 * Performs the operation that the requested thread state requires (abort,
4334 static MonoException*
4335 mono_thread_execute_interruption (void)
4337 MonoInternalThread *thread = mono_thread_internal_current ();
4338 MonoThread *sys_thread = mono_thread_current ();
4340 LOCK_THREAD (thread);
4342 /* MonoThread::interruption_requested can only be changed with atomics */
4343 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4344 /* this will consume pending APC calls */
4346 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4348 InterlockedDecrement (&thread_interruption_requested);
4350 /* Clear the interrupted flag of the thread so it can wait again */
4351 mono_thread_info_clear_self_interrupt ();
4354 if ((thread->state & ThreadState_AbortRequested) != 0) {
4355 UNLOCK_THREAD (thread);
4356 if (thread->abort_exc == NULL) {
4358 * This might be racy, but it has to be called outside the lock
4359 * since it calls managed code.
4361 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4363 return thread->abort_exc;
4365 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4366 /* calls UNLOCK_THREAD (thread) */
4367 self_suspend_internal ();
4370 else if ((thread->state & ThreadState_StopRequested) != 0) {
4371 /* FIXME: do this through the JIT? */
4373 UNLOCK_THREAD (thread);
4375 mono_thread_exit ();
4377 } else if (sys_thread->pending_exception) {
4380 exc = sys_thread->pending_exception;
4381 sys_thread->pending_exception = NULL;
4383 UNLOCK_THREAD (thread);
4385 } else if (thread->thread_interrupt_requested) {
4387 thread->thread_interrupt_requested = FALSE;
4388 UNLOCK_THREAD (thread);
4390 return(mono_get_exception_thread_interrupted ());
4393 UNLOCK_THREAD (thread);
4399 * mono_thread_request_interruption
4401 * A signal handler can call this method to request the interruption of a
4402 * thread. The result of the interruption will depend on the current state of
4403 * the thread. If the result is an exception that needs to be throw, it is
4404 * provided as return value.
4407 mono_thread_request_interruption (gboolean running_managed)
4409 MonoInternalThread *thread = mono_thread_internal_current ();
4411 /* The thread may already be stopping */
4416 if (thread->interrupt_on_stop &&
4417 thread->state & ThreadState_StopRequested &&
4418 thread->state & ThreadState_Background)
4422 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4424 InterlockedIncrement (&thread_interruption_requested);
4426 if (!running_managed || is_running_protected_wrapper ()) {
4427 /* Can't stop while in unmanaged code. Increase the global interruption
4428 request count. When exiting the unmanaged method the count will be
4429 checked and the thread will be interrupted. */
4431 /* this will awake the thread if it is in WaitForSingleObject
4433 /* Our implementation of this function ignores the func argument */
4435 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4437 mono_thread_info_self_interrupt ();
4442 return mono_thread_execute_interruption ();
4446 /*This function should be called by a thread after it has exited all of
4447 * its handle blocks at interruption time.*/
4449 mono_thread_resume_interruption (void)
4451 MonoInternalThread *thread = mono_thread_internal_current ();
4452 gboolean still_aborting;
4454 /* The thread may already be stopping */
4458 LOCK_THREAD (thread);
4459 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4460 UNLOCK_THREAD (thread);
4462 /*This can happen if the protected block called Thread::ResetAbort*/
4463 if (!still_aborting)
4466 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4468 InterlockedIncrement (&thread_interruption_requested);
4470 mono_thread_info_self_interrupt ();
4472 return mono_thread_execute_interruption ();
4475 gboolean mono_thread_interruption_requested ()
4477 if (thread_interruption_requested) {
4478 MonoInternalThread *thread = mono_thread_internal_current ();
4479 /* The thread may already be stopping */
4481 return (thread->interruption_requested);
4486 static MonoException*
4487 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4489 MonoInternalThread *thread = mono_thread_internal_current ();
4491 /* The thread may already be stopping */
4495 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4496 MonoException* exc = mono_thread_execute_interruption ();
4504 * Performs the interruption of the current thread, if one has been requested,
4505 * and the thread is not running a protected wrapper.
4506 * Return the exception which needs to be thrown, if any.
4509 mono_thread_interruption_checkpoint (void)
4511 return mono_thread_interruption_checkpoint_request (FALSE);
4515 * Performs the interruption of the current thread, if one has been requested.
4516 * Return the exception which needs to be thrown, if any.
4519 mono_thread_force_interruption_checkpoint_noraise (void)
4521 return mono_thread_interruption_checkpoint_request (TRUE);
4525 * mono_thread_get_and_clear_pending_exception:
4527 * Return any pending exceptions for the current thread and clear it as a side effect.
4530 mono_thread_get_and_clear_pending_exception (void)
4532 MonoInternalThread *thread = mono_thread_internal_current ();
4533 MonoThread *sys_thread = mono_thread_current ();
4535 /* The thread may already be stopping */
4539 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4540 return mono_thread_execute_interruption ();
4543 if (sys_thread->pending_exception) {
4544 MonoException *exc = sys_thread->pending_exception;
4546 sys_thread->pending_exception = NULL;
4554 * mono_set_pending_exception:
4556 * Set the pending exception of the current thread to EXC.
4557 * The exception will be thrown when execution returns to managed code.
4560 mono_set_pending_exception (MonoException *exc)
4562 MonoThread *thread = mono_thread_current ();
4564 /* The thread may already be stopping */
4568 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4570 mono_thread_request_interruption (FALSE);
4574 * mono_thread_interruption_request_flag:
4576 * Returns the address of a flag that will be non-zero if an interruption has
4577 * been requested for a thread. The thread to interrupt may not be the current
4578 * thread, so an additional call to mono_thread_interruption_requested() or
4579 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4582 gint32* mono_thread_interruption_request_flag ()
4584 return &thread_interruption_requested;
4588 mono_thread_init_apartment_state (void)
4591 MonoInternalThread* thread = mono_thread_internal_current ();
4593 /* Positive return value indicates success, either
4594 * S_OK if this is first CoInitialize call, or
4595 * S_FALSE if CoInitialize already called, but with same
4596 * threading model. A negative value indicates failure,
4597 * probably due to trying to change the threading model.
4599 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4600 ? COINIT_APARTMENTTHREADED
4601 : COINIT_MULTITHREADED) < 0) {
4602 thread->apartment_state = ThreadApartmentState_Unknown;
4608 mono_thread_cleanup_apartment_state (void)
4611 MonoInternalThread* thread = mono_thread_internal_current ();
4613 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4620 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4622 LOCK_THREAD (thread);
4623 thread->state |= state;
4624 UNLOCK_THREAD (thread);
4628 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4630 LOCK_THREAD (thread);
4631 thread->state &= ~state;
4632 UNLOCK_THREAD (thread);
4636 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4638 gboolean ret = FALSE;
4640 LOCK_THREAD (thread);
4642 if ((thread->state & test) != 0) {
4646 UNLOCK_THREAD (thread);
4651 static gboolean has_tls_get = FALSE;
4654 mono_runtime_set_has_tls_get (gboolean val)
4660 mono_runtime_has_tls_get (void)
4666 self_interrupt_thread (void *_unused)
4668 MonoThreadInfo *info = mono_thread_info_current ();
4669 MonoException *exc = mono_thread_execute_interruption ();
4670 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4671 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. */
4672 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4676 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4680 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4684 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4686 MonoJitInfo **dest = (MonoJitInfo **)data;
4692 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4694 MonoJitInfo *ji = NULL;
4699 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4700 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4701 * where we hold runtime locks.
4703 if (!mono_threads_is_coop_enabled ())
4704 mono_thread_info_set_is_async_context (TRUE);
4705 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4706 if (!mono_threads_is_coop_enabled ())
4707 mono_thread_info_set_is_async_context (FALSE);
4712 MonoInternalThread *thread;
4713 gboolean install_async_abort;
4714 MonoThreadInfoInterruptToken *interrupt_token;
4717 static SuspendThreadResult
4718 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4720 AbortThreadData *data = (AbortThreadData *)ud;
4721 MonoInternalThread *thread = data->thread;
4722 MonoJitInfo *ji = NULL;
4723 gboolean protected_wrapper;
4724 gboolean running_managed;
4726 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4727 return MonoResumeThread;
4729 /*someone is already interrupting it*/
4730 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4731 return MonoResumeThread;
4733 InterlockedIncrement (&thread_interruption_requested);
4735 ji = mono_thread_info_get_last_managed (info);
4736 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4737 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4739 if (!protected_wrapper && running_managed) {
4740 /*We are in managed code*/
4741 /*Set the thread to call */
4742 if (data->install_async_abort)
4743 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4744 return MonoResumeThread;
4747 * This will cause waits to be broken.
4748 * It will also prevent the thread from entering a wait, so if the thread returns
4749 * from the wait before it receives the abort signal, it will just spin in the wait
4750 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4753 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4755 return MonoResumeThread;
4760 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4762 AbortThreadData data;
4764 g_assert (thread != mono_thread_internal_current ());
4766 data.thread = thread;
4767 data.install_async_abort = install_async_abort;
4768 data.interrupt_token = NULL;
4770 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4771 if (data.interrupt_token)
4772 mono_thread_info_finish_interrupt (data.interrupt_token);
4773 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4777 self_abort_internal (void)
4781 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4782 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4784 exc = mono_thread_request_interruption (TRUE);
4786 mono_raise_exception (exc);
4788 mono_thread_info_self_interrupt ();
4792 MonoInternalThread *thread;
4794 MonoThreadInfoInterruptToken *interrupt_token;
4795 } SuspendThreadData;
4797 static SuspendThreadResult
4798 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4800 SuspendThreadData *data = (SuspendThreadData *)ud;
4801 MonoInternalThread *thread = data->thread;
4802 MonoJitInfo *ji = NULL;
4803 gboolean protected_wrapper;
4804 gboolean running_managed;
4806 ji = mono_thread_info_get_last_managed (info);
4807 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4808 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4810 if (running_managed && !protected_wrapper) {
4811 thread->state &= ~ThreadState_SuspendRequested;
4812 thread->state |= ThreadState_Suspended;
4813 return KeepSuspended;
4815 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4816 InterlockedIncrement (&thread_interruption_requested);
4817 if (data->interrupt)
4818 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4820 return MonoResumeThread;
4824 /* LOCKING: called with @thread synch_cs held, and releases it */
4826 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4828 SuspendThreadData data;
4830 g_assert (thread != mono_thread_internal_current ());
4832 data.thread = thread;
4833 data.interrupt = interrupt;
4834 data.interrupt_token = NULL;
4836 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4837 if (data.interrupt_token)
4838 mono_thread_info_finish_interrupt (data.interrupt_token);
4840 UNLOCK_THREAD (thread);
4843 /* LOCKING: called with @thread synch_cs held, and releases it */
4845 self_suspend_internal (void)
4847 MonoInternalThread *thread;
4849 thread = mono_thread_internal_current ();
4851 mono_thread_info_begin_self_suspend ();
4852 thread->state &= ~ThreadState_SuspendRequested;
4853 thread->state |= ThreadState_Suspended;
4855 UNLOCK_THREAD (thread);
4857 mono_thread_info_end_self_suspend ();
4861 * mono_thread_is_foreign:
4862 * @thread: the thread to query
4864 * This function allows one to determine if a thread was created by the mono runtime and has
4865 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4867 * Returns: TRUE if @thread was not created by the runtime.
4870 mono_thread_is_foreign (MonoThread *thread)
4872 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4873 return info->runtime_thread == FALSE;
4877 * mono_add_joinable_thread:
4879 * Add TID to the list of joinable threads.
4880 * LOCKING: Acquires the threads lock.
4883 mono_threads_add_joinable_thread (gpointer tid)
4887 * We cannot detach from threads because it causes problems like
4888 * 2fd16f60/r114307. So we collect them and join them when
4889 * we have time (in he finalizer thread).
4891 joinable_threads_lock ();
4892 if (!joinable_threads)
4893 joinable_threads = g_hash_table_new (NULL, NULL);
4894 g_hash_table_insert (joinable_threads, tid, tid);
4895 joinable_thread_count ++;
4896 joinable_threads_unlock ();
4898 mono_gc_finalize_notify ();
4903 * mono_threads_join_threads:
4905 * Join all joinable threads. This is called from the finalizer thread.
4906 * LOCKING: Acquires the threads lock.
4909 mono_threads_join_threads (void)
4912 GHashTableIter iter;
4919 if (!joinable_thread_count)
4923 joinable_threads_lock ();
4925 if (g_hash_table_size (joinable_threads)) {
4926 g_hash_table_iter_init (&iter, joinable_threads);
4927 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4928 thread = (pthread_t)tid;
4929 g_hash_table_remove (joinable_threads, key);
4930 joinable_thread_count --;
4933 joinable_threads_unlock ();
4935 if (thread != pthread_self ())
4936 /* This shouldn't block */
4937 pthread_join (thread, NULL);
4948 * Wait for thread TID to exit.
4949 * LOCKING: Acquires the threads lock.
4952 mono_thread_join (gpointer tid)
4956 gboolean found = FALSE;
4958 joinable_threads_lock ();
4959 if (!joinable_threads)
4960 joinable_threads = g_hash_table_new (NULL, NULL);
4961 if (g_hash_table_lookup (joinable_threads, tid)) {
4962 g_hash_table_remove (joinable_threads, tid);
4963 joinable_thread_count --;
4966 joinable_threads_unlock ();
4969 thread = (pthread_t)tid;
4970 pthread_join (thread, NULL);
4975 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4977 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4978 mono_thread_interruption_checkpoint ();
4981 static inline gboolean
4982 is_appdomainunloaded_exception (MonoClass *klass)
4984 return klass == mono_class_get_appdomain_unloaded_exception_class ();
4987 static inline gboolean
4988 is_threadabort_exception (MonoClass *klass)
4990 return klass == mono_defaults.threadabortexception_class;
4994 mono_thread_internal_unhandled_exception (MonoObject* exc)
4996 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4997 MonoClass *klass = exc->vtable->klass;
4998 if (is_threadabort_exception (klass)) {
4999 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5000 } else if (!is_appdomainunloaded_exception (klass)) {
5001 mono_unhandled_exception (exc);
5002 if (mono_environment_exitcode_get () == 1)
5009 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5011 mono_threads_get_thread_dump (out_threads, out_stack_traces);