2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
19 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threads-types.h>
24 #include <mono/metadata/exception.h>
25 #include <mono/metadata/environment.h>
26 #include <mono/metadata/monitor.h>
27 #include <mono/metadata/gc-internals.h>
28 #include <mono/metadata/marshal.h>
29 #include <mono/metadata/runtime.h>
30 #include <mono/io-layer/io-layer.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/mono-debug-debugger.h>
33 #include <mono/utils/monobitset.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/hazard-pointer.h>
40 #include <mono/utils/mono-tls.h>
41 #include <mono/utils/atomic.h>
42 #include <mono/utils/mono-memory-model.h>
44 #include <mono/metadata/gc-internals.h>
45 #include <mono/metadata/reflection-internals.h>
51 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
52 #define USE_TKILL_ON_ANDROID 1
55 #ifdef PLATFORM_ANDROID
58 #ifdef USE_TKILL_ON_ANDROID
59 extern int tkill (pid_t tid, int signal);
63 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
64 #define THREAD_DEBUG(a)
65 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
66 #define THREAD_WAIT_DEBUG(a)
67 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
68 #define LIBGC_DEBUG(a)
70 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
71 #define SPIN_LOCK(i) do { \
72 if (SPIN_TRYLOCK (i)) \
76 #define SPIN_UNLOCK(i) i = 0
78 #define LOCK_THREAD(thread) lock_thread((thread))
79 #define UNLOCK_THREAD(thread) unlock_thread((thread))
81 /* Provide this for systems with glib < 2.6 */
82 #ifndef G_GSIZE_FORMAT
83 # if GLIB_SIZEOF_LONG == 8
84 # define G_GSIZE_FORMAT "lu"
86 # define G_GSIZE_FORMAT "u"
92 guint32 (*func)(void *);
108 typedef struct _StaticDataFreeList StaticDataFreeList;
109 struct _StaticDataFreeList {
110 StaticDataFreeList *next;
118 StaticDataFreeList *freelist;
121 /* Number of cached culture objects in the MonoThread->cached_culture_info array
122 * (per-type): we use the first NUM entries for CultureInfo and the last for
123 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
125 #define NUM_CACHED_CULTURES 4
126 #define CULTURES_START_IDX 0
127 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
129 /* Controls access to the 'threads' hash table */
130 static void mono_threads_lock (void);
131 static void mono_threads_unlock (void);
132 static MonoCoopMutex threads_mutex;
134 /* Controls access to the 'joinable_threads' hash table */
135 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
136 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
137 static mono_mutex_t joinable_threads_mutex;
139 /* Holds current status of static data heap */
140 static StaticDataInfo thread_static_info;
141 static StaticDataInfo context_static_info;
143 /* The hash of existing threads (key is thread ID, value is
144 * MonoInternalThread*) that need joining before exit
146 static MonoGHashTable *threads=NULL;
148 /* List of app context GC handles.
149 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
151 static GHashTable *contexts = NULL;
153 /* Cleanup queue for contexts. */
154 static MonoReferenceQueue *context_queue;
157 * Threads which are starting up and they are not in the 'threads' hash yet.
158 * When handle_store is called for a thread, it will be removed from this hash table.
159 * Protected by mono_threads_lock ().
161 static MonoGHashTable *threads_starting_up = NULL;
163 /* The TLS key that holds the MonoObject assigned to each thread */
164 static MonoNativeTlsKey current_object_key;
167 /* Protected by the threads lock */
168 static GHashTable *joinable_threads;
169 static int joinable_thread_count;
171 #ifdef MONO_HAVE_FAST_TLS
172 /* we need to use both the Tls* functions and __thread because
173 * the gc needs to see all the threads
175 MONO_FAST_TLS_DECLARE(tls_current_object);
176 #define SET_CURRENT_OBJECT(x) do { \
177 MONO_FAST_TLS_SET (tls_current_object, x); \
178 mono_native_tls_set_value (current_object_key, x); \
180 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
182 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
183 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
186 /* function called at thread start */
187 static MonoThreadStartCB mono_thread_start_cb = NULL;
189 /* function called at thread attach */
190 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
192 /* function called at thread cleanup */
193 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
195 /* function called to notify the runtime about a pending exception on the current thread */
196 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
198 /* The default stack size for each thread */
199 static guint32 default_stacksize = 0;
200 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
202 static void thread_adjust_static_data (MonoInternalThread *thread);
203 static void context_adjust_static_data (MonoAppContext *ctx);
204 static void mono_free_static_data (gpointer* static_data);
205 static void mono_init_static_data_info (StaticDataInfo *static_data);
206 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
207 static gboolean mono_thread_resume (MonoInternalThread* thread);
208 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
209 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
210 static void self_suspend_internal (MonoInternalThread *thread);
212 static MonoException* mono_thread_execute_interruption (void);
213 static void ref_stack_destroy (gpointer rs);
215 /* Spin lock for InterlockedXXX 64 bit functions */
216 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
217 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
218 static mono_mutex_t interlocked_mutex;
220 /* global count of thread interruptions requested */
221 static gint32 thread_interruption_requested = 0;
223 /* Event signaled when a thread changes its background mode */
224 static HANDLE background_change_event;
226 static gboolean shutting_down = FALSE;
228 static gint32 managed_thread_id_counter = 0;
231 mono_threads_lock (void)
233 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
237 mono_threads_unlock (void)
239 mono_locks_coop_release (&threads_mutex, ThreadsLock);
244 get_next_managed_thread_id (void)
246 return InterlockedIncrement (&managed_thread_id_counter);
250 mono_thread_get_tls_key (void)
252 return current_object_key;
256 mono_thread_get_tls_offset (void)
259 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
263 static inline MonoNativeThreadId
264 thread_get_tid (MonoInternalThread *thread)
266 /* We store the tid as a guint64 to keep the object layout constant between platforms */
267 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
270 /* handle_store() and handle_remove() manage the array of threads that
271 * still need to be waited for when the main thread exits.
273 * If handle_store() returns FALSE the thread must not be started
274 * because Mono is shutting down.
276 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
278 mono_threads_lock ();
280 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
282 if (threads_starting_up)
283 mono_g_hash_table_remove (threads_starting_up, thread);
285 if (shutting_down && !force_attach) {
286 mono_threads_unlock ();
291 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
292 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
295 /* We don't need to duplicate thread->handle, because it is
296 * only closed when the thread object is finalized by the GC.
298 g_assert (thread->internal_thread);
299 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
300 thread->internal_thread);
302 mono_threads_unlock ();
307 static gboolean handle_remove(MonoInternalThread *thread)
310 gsize tid = thread->tid;
312 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
314 mono_threads_lock ();
317 /* We have to check whether the thread object for the
318 * tid is still the same in the table because the
319 * thread might have been destroyed and the tid reused
320 * in the meantime, in which case the tid would be in
321 * the table, but with another thread object.
323 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
324 mono_g_hash_table_remove (threads, (gpointer)tid);
333 mono_threads_unlock ();
335 /* Don't close the handle here, wait for the object finalizer
336 * to do it. Otherwise, the following race condition applies:
338 * 1) Thread exits (and handle_remove() closes the handle)
340 * 2) Some other handle is reassigned the same slot
342 * 3) Another thread tries to join the first thread, and
343 * blocks waiting for the reassigned handle to be signalled
344 * (which might never happen). This is possible, because the
345 * thread calling Join() still has a reference to the first
351 static void ensure_synch_cs_set (MonoInternalThread *thread)
353 MonoCoopMutex *synch_cs;
355 if (thread->synch_cs != NULL) {
359 synch_cs = g_new0 (MonoCoopMutex, 1);
360 mono_coop_mutex_init_recursive (synch_cs);
362 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
363 synch_cs, NULL) != NULL) {
364 /* Another thread must have installed this CS */
365 mono_coop_mutex_destroy (synch_cs);
371 lock_thread (MonoInternalThread *thread)
373 if (!thread->synch_cs)
374 ensure_synch_cs_set (thread);
376 g_assert (thread->synch_cs);
378 mono_coop_mutex_lock (thread->synch_cs);
382 unlock_thread (MonoInternalThread *thread)
384 mono_coop_mutex_unlock (thread->synch_cs);
388 * NOTE: this function can be called also for threads different from the current one:
389 * make sure no code called from it will ever assume it is run on the thread that is
390 * getting cleaned up.
392 static void thread_cleanup (MonoInternalThread *thread)
394 g_assert (thread != NULL);
396 if (thread->abort_state_handle) {
397 mono_gchandle_free (thread->abort_state_handle);
398 thread->abort_state_handle = 0;
400 thread->abort_exc = NULL;
401 thread->current_appcontext = NULL;
404 * This is necessary because otherwise we might have
405 * cross-domain references which will not get cleaned up when
406 * the target domain is unloaded.
408 if (thread->cached_culture_info) {
410 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
411 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
415 * thread->synch_cs can be NULL if this was called after
416 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
417 * This can happen only during shutdown.
418 * The shutting_down flag is not always set, so we can't assert on it.
420 if (thread->synch_cs)
421 LOCK_THREAD (thread);
423 thread->state |= ThreadState_Stopped;
424 thread->state &= ~ThreadState_Background;
426 if (thread->synch_cs)
427 UNLOCK_THREAD (thread);
430 An interruption request has leaked to cleanup. Adjust the global counter.
432 This can happen is the abort source thread finds the abortee (this) thread
433 in unmanaged code. If this thread never trips back to managed code or check
434 the local flag it will be left set and positively unbalance the global counter.
436 Leaving the counter unbalanced will cause a performance degradation since all threads
437 will now keep checking their local flags all the time.
439 if (InterlockedExchange (&thread->interruption_requested, 0))
440 InterlockedDecrement (&thread_interruption_requested);
442 /* if the thread is not in the hash it has been removed already */
443 if (!handle_remove (thread)) {
444 if (thread == mono_thread_internal_current ()) {
445 mono_domain_unset ();
446 mono_memory_barrier ();
448 /* This needs to be called even if handle_remove () fails */
449 if (mono_thread_cleanup_fn)
450 mono_thread_cleanup_fn (thread_get_tid (thread));
453 mono_release_type_locks (thread);
455 mono_profiler_thread_end (thread->tid);
457 if (thread == mono_thread_internal_current ()) {
459 * This will signal async signal handlers that the thread has exited.
460 * The profiler callback needs this to be set, so it cannot be done earlier.
462 mono_domain_unset ();
463 mono_memory_barrier ();
466 if (thread == mono_thread_internal_current ())
467 mono_thread_pop_appdomain_ref ();
469 thread->cached_culture_info = NULL;
471 mono_free_static_data (thread->static_data);
472 thread->static_data = NULL;
473 ref_stack_destroy (thread->appdomain_refs);
474 thread->appdomain_refs = NULL;
476 if (mono_thread_cleanup_fn)
477 mono_thread_cleanup_fn (thread_get_tid (thread));
479 if (mono_gc_is_moving ()) {
480 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
481 thread->thread_pinning_ref = NULL;
487 * A special static data offset (guint32) consists of 3 parts:
489 * [0] 6-bit index into the array of chunks.
490 * [6] 25-bit offset into the array.
491 * [31] Bit indicating thread or context static.
496 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
507 } SpecialStaticOffset;
509 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
510 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
512 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
513 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
514 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
515 (((SpecialStaticOffset *) &(x))->fields.f)
518 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
520 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
522 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
523 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
525 return ((char *) thread->static_data [idx]) + off;
529 get_context_static_data (MonoAppContext *ctx, guint32 offset)
531 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
533 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
534 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
536 return ((char *) ctx->static_data [idx]) + off;
540 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
542 static MonoClassField *current_thread_field = NULL;
546 if (!current_thread_field) {
547 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
548 g_assert (current_thread_field);
551 mono_class_vtable (domain, mono_defaults.thread_class);
552 mono_domain_lock (domain);
553 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
554 mono_domain_unlock (domain);
557 return (MonoThread **)get_thread_static_data (thread, offset);
561 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
563 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
565 g_assert (current->obj.vtable->domain == domain);
567 g_assert (!*current_thread_ptr);
568 *current_thread_ptr = current;
572 create_thread_object (MonoDomain *domain, MonoError *error)
574 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
575 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
580 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
584 thread = create_thread_object (domain, error);
585 if (!mono_error_ok (error))
588 MONO_OBJECT_SETREF (thread, internal_thread, internal);
593 static MonoInternalThread*
594 create_internal_thread (MonoError *error)
596 MonoInternalThread *thread;
599 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
600 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
601 if (!mono_error_ok (error))
604 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
605 mono_coop_mutex_init_recursive (thread->synch_cs);
607 thread->apartment_state = ThreadApartmentState_Unknown;
608 thread->managed_id = get_next_managed_thread_id ();
609 if (mono_gc_is_moving ()) {
610 thread->thread_pinning_ref = thread;
611 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
618 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
621 MonoDomain *domain = mono_get_root_domain ();
623 if (!candidate || candidate->obj.vtable->domain != domain) {
624 candidate = new_thread_with_internal (domain, thread, &error);
625 mono_error_raise_exception (&error); /* FIXME don't raise here */
627 set_current_thread_for_domain (domain, thread, candidate);
628 g_assert (!thread->root_domain_thread);
629 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
632 static guint32 WINAPI start_wrapper_internal(void *data)
634 MonoThreadInfo *info;
635 StartInfo *start_info = (StartInfo *)data;
636 guint32 (*start_func)(void *);
640 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
643 MonoInternalThread *internal = start_info->obj->internal_thread;
644 MonoObject *start_delegate = start_info->delegate;
645 MonoDomain *domain = start_info->obj->obj.vtable->domain;
647 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
649 /* We can be sure start_info->obj->tid and
650 * start_info->obj->handle have been set, because the thread
651 * was created suspended, and these values were set before the
655 info = mono_thread_info_current ();
657 internal->thread_info = info;
658 internal->small_id = info->small_id;
662 SET_CURRENT_OBJECT (internal);
664 /* Every thread references the appdomain which created it */
665 mono_thread_push_appdomain_ref (domain);
667 if (!mono_domain_set (domain, FALSE)) {
668 /* No point in raising an appdomain_unloaded exception here */
669 /* FIXME: Cleanup here */
670 mono_thread_pop_appdomain_ref ();
674 start_func = start_info->func;
675 start_arg = start_info->obj->start_obj;
677 start_arg = start_info->start_arg;
679 /* We have to do this here because mono_thread_new_init()
680 requires that root_domain_thread is set up. */
681 thread_adjust_static_data (internal);
682 init_root_domain_thread (internal, start_info->obj);
684 /* This MUST be called before any managed code can be
685 * executed, as it calls the callback function that (for the
686 * jit) sets the lmf marker.
688 mono_thread_new_init (tid, &tid, start_func);
689 internal->stack_ptr = &tid;
690 if (domain != mono_get_root_domain ())
691 set_current_thread_for_domain (domain, internal, start_info->obj);
693 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
695 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
697 /* On 2.0 profile (and higher), set explicitly since state might have been
699 if (internal->apartment_state == ThreadApartmentState_Unknown)
700 internal->apartment_state = ThreadApartmentState_MTA;
702 mono_thread_init_apartment_state ();
704 if(internal->start_notify!=NULL) {
705 /* Let the thread that called Start() know we're
708 ReleaseSemaphore (internal->start_notify, 1, NULL);
712 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
716 * Call this after calling start_notify, since the profiler callback might want
717 * to lock the thread, and the lock is held by thread_start () which waits for
720 mono_profiler_thread_start (tid);
722 /* if the name was set before starting, we didn't invoke the profiler callback */
723 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
724 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
725 mono_profiler_thread_name (internal->tid, tname);
728 /* start_func is set only for unmanaged start functions */
730 start_func (start_arg);
733 g_assert (start_delegate != NULL);
734 args [0] = start_arg;
735 /* we may want to handle the exception here. See comment below on unhandled exceptions */
736 mono_runtime_delegate_invoke (start_delegate, args, NULL);
739 /* If the thread calls ExitThread at all, this remaining code
740 * will not be executed, but the main thread will eventually
741 * call thread_cleanup() on this thread's behalf.
744 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
746 /* Do any cleanup needed for apartment state. This
747 * cannot be done in thread_cleanup since thread_cleanup could be
748 * called for a thread other than the current thread.
749 * mono_thread_cleanup_apartment_state cleans up apartment
750 * for the current thead */
751 mono_thread_cleanup_apartment_state ();
753 thread_cleanup (internal);
757 /* Remove the reference to the thread object in the TLS data,
758 * so the thread object can be finalized. This won't be
759 * reached if the thread threw an uncaught exception, so those
760 * thread handles will stay referenced :-( (This is due to
761 * missing support for scanning thread-specific data in the
762 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
765 SET_CURRENT_OBJECT (NULL);
770 static guint32 WINAPI start_wrapper(void *data)
774 /* Avoid scanning the frames above this frame during a GC */
775 mono_gc_set_stack_end ((void*)&dummy);
777 return start_wrapper_internal (data);
783 * Common thread creation code.
784 * LOCKING: Acquires the threads lock.
787 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
788 gboolean throw_on_failure)
790 HANDLE thread_handle;
791 MonoNativeThreadId tid;
792 guint32 create_flags;
795 * Join joinable threads to prevent running out of threads since the finalizer
796 * thread might be blocked/backlogged.
798 mono_threads_join_threads ();
800 mono_threads_lock ();
803 mono_threads_unlock ();
806 if (threads_starting_up == NULL) {
807 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
808 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
810 mono_g_hash_table_insert (threads_starting_up, thread, thread);
811 mono_threads_unlock ();
813 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
814 if (!internal->start_notify) {
815 mono_threads_lock ();
816 mono_g_hash_table_remove (threads_starting_up, thread);
817 mono_threads_unlock ();
818 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
824 stack_size = default_stacksize_for_thread (internal);
826 /* Create suspended, so we can do some housekeeping before the thread
829 create_flags = CREATE_SUSPENDED;
831 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
832 stack_size, create_flags, &tid);
834 if (thread_handle == NULL) {
835 /* The thread couldn't be created, so throw an exception */
836 mono_threads_lock ();
837 mono_g_hash_table_remove (threads_starting_up, thread);
838 mono_threads_unlock ();
840 if (throw_on_failure)
841 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
843 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
846 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
848 internal->handle = thread_handle;
849 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
851 internal->threadpool_thread = threadpool_thread;
852 if (threadpool_thread)
853 mono_thread_set_state (internal, ThreadState_Background);
855 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
857 /* Only store the handle when the thread is about to be
858 * launched, to avoid the main thread deadlocking while trying
859 * to clean up a thread that will never be signalled.
861 if (!handle_store (thread, FALSE))
864 mono_thread_info_resume (tid);
866 if (internal->start_notify) {
868 * Wait for the thread to set up its TLS data etc, so
869 * theres no potential race condition if someone tries
870 * to look up the data believing the thread has
873 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));
875 MONO_PREPARE_BLOCKING;
876 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
877 MONO_FINISH_BLOCKING;
879 CloseHandle (internal->start_notify);
880 internal->start_notify = NULL;
883 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));
888 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
890 if (mono_thread_start_cb) {
891 mono_thread_start_cb (tid, stack_start, func);
895 void mono_threads_set_default_stacksize (guint32 stacksize)
897 default_stacksize = stacksize;
900 guint32 mono_threads_get_default_stacksize (void)
902 return default_stacksize;
906 * mono_thread_create_internal:
908 * ARG should not be a GC reference.
911 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
915 MonoInternalThread *internal;
916 StartInfo *start_info;
919 thread = create_thread_object (domain, &error);
920 mono_error_raise_exception (&error); /* FIXME don't raise here */
922 internal = create_internal_thread (&error);
923 mono_error_raise_exception (&error); /* FIXME don't raise here */
925 MONO_OBJECT_SETREF (thread, internal_thread, internal);
927 start_info = g_new0 (StartInfo, 1);
928 start_info->func = (guint32 (*)(void *))func;
929 start_info->obj = thread;
930 start_info->start_arg = arg;
932 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
936 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
937 #ifndef MONO_CROSS_COMPILE
938 if (mono_check_corlib_version () == NULL)
939 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
946 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
948 mono_thread_create_internal (domain, func, arg, FALSE, 0);
952 mono_thread_attach (MonoDomain *domain)
955 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
956 mono_error_raise_exception (&error);
962 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
964 MonoThreadInfo *info;
965 MonoInternalThread *thread;
966 MonoThread *current_thread;
967 HANDLE thread_handle;
968 MonoNativeThreadId tid;
970 mono_error_init (error);
972 if ((thread = mono_thread_internal_current ())) {
973 if (domain != mono_domain_get ())
974 mono_domain_set (domain, TRUE);
975 /* Already attached */
976 return mono_thread_current ();
979 if (!mono_gc_register_thread (&domain)) {
980 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 ());
983 thread = create_internal_thread (error);
984 if (!mono_error_ok (error))
987 thread_handle = mono_thread_info_open_handle ();
988 g_assert (thread_handle);
990 tid=mono_native_thread_id_get ();
992 thread->handle = thread_handle;
993 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
994 thread->stack_ptr = &tid;
996 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
998 info = mono_thread_info_current ();
1000 thread->thread_info = info;
1001 thread->small_id = info->small_id;
1003 current_thread = new_thread_with_internal (domain, thread, error);
1004 if (!mono_error_ok (error))
1007 if (!handle_store (current_thread, force_attach)) {
1008 /* Mono is shutting down, so just wait for the end */
1010 mono_thread_info_sleep (10000, NULL);
1013 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1015 SET_CURRENT_OBJECT (thread);
1016 mono_domain_set (domain, TRUE);
1018 thread_adjust_static_data (thread);
1020 init_root_domain_thread (thread, current_thread);
1021 if (domain != mono_get_root_domain ())
1022 set_current_thread_for_domain (domain, thread, current_thread);
1025 if (mono_thread_attach_cb) {
1029 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1032 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1034 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1037 // FIXME: Need a separate callback
1038 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1040 return current_thread;
1044 mono_thread_detach_internal (MonoInternalThread *thread)
1046 g_return_if_fail (thread != NULL);
1048 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1050 thread_cleanup (thread);
1052 SET_CURRENT_OBJECT (NULL);
1053 mono_domain_unset ();
1055 /* Don't need to CloseHandle this thread, even though we took a
1056 * reference in mono_thread_attach (), because the GC will do it
1057 * when the Thread object is finalised.
1062 mono_thread_detach (MonoThread *thread)
1065 mono_thread_detach_internal (thread->internal_thread);
1069 * mono_thread_detach_if_exiting:
1071 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1072 * This should be used at the end of embedding code which calls into managed code, and which
1073 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1076 mono_thread_detach_if_exiting (void)
1078 if (mono_thread_info_is_exiting ()) {
1079 MonoInternalThread *thread;
1081 thread = mono_thread_internal_current ();
1083 mono_thread_detach_internal (thread);
1084 mono_thread_info_detach ();
1092 MonoInternalThread *thread = mono_thread_internal_current ();
1094 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1096 thread_cleanup (thread);
1097 SET_CURRENT_OBJECT (NULL);
1098 mono_domain_unset ();
1100 /* we could add a callback here for embedders to use. */
1101 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1102 exit (mono_environment_exitcode_get ());
1103 mono_thread_info_exit ();
1107 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1110 MonoInternalThread *internal;
1112 internal = create_internal_thread (&error);
1113 mono_error_raise_exception (&error);
1115 internal->state = ThreadState_Unstarted;
1117 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1121 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1124 StartInfo *start_info;
1125 MonoInternalThread *internal;
1128 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1130 if (!this_obj->internal_thread)
1131 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1132 internal = this_obj->internal_thread;
1134 LOCK_THREAD (internal);
1136 if ((internal->state & ThreadState_Unstarted) == 0) {
1137 UNLOCK_THREAD (internal);
1138 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1142 if ((internal->state & ThreadState_Aborted) != 0) {
1143 UNLOCK_THREAD (internal);
1146 /* This is freed in start_wrapper */
1147 start_info = g_new0 (StartInfo, 1);
1148 start_info->func = NULL;
1149 start_info->start_arg = NULL;
1150 start_info->delegate = start;
1151 start_info->obj = this_obj;
1152 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1154 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1156 UNLOCK_THREAD (internal);
1160 internal->state &= ~ThreadState_Unstarted;
1162 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1164 UNLOCK_THREAD (internal);
1165 return internal->handle;
1169 * This is called from the finalizer of the internal thread object.
1172 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1174 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1177 * Since threads keep a reference to their thread object while running, by the time this function is called,
1178 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1179 * when thread_cleanup () can be called after this.
1182 CloseHandle (thread);
1184 if (this_obj->synch_cs) {
1185 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1186 this_obj->synch_cs = NULL;
1187 mono_coop_mutex_destroy (synch_cs);
1191 if (this_obj->name) {
1192 void *name = this_obj->name;
1193 this_obj->name = NULL;
1199 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1202 MonoInternalThread *thread = mono_thread_internal_current ();
1204 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1206 mono_thread_current_check_pending_interrupt ();
1209 gboolean alerted = FALSE;
1211 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1213 res = mono_thread_info_sleep (ms, &alerted);
1215 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1218 MonoException* exc = mono_thread_execute_interruption ();
1220 mono_raise_exception (exc);
1232 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1237 ves_icall_System_Threading_Thread_GetDomainID (void)
1239 return mono_domain_get()->domain_id;
1243 ves_icall_System_Threading_Thread_Yield (void)
1245 return mono_thread_info_yield ();
1249 * mono_thread_get_name:
1251 * Return the name of the thread. NAME_LEN is set to the length of the name.
1252 * Return NULL if the thread has no name. The returned memory is owned by the
1256 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1260 LOCK_THREAD (this_obj);
1262 if (!this_obj->name) {
1266 *name_len = this_obj->name_len;
1267 res = g_new (gunichar2, this_obj->name_len);
1268 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1271 UNLOCK_THREAD (this_obj);
1277 * mono_thread_get_name_utf8:
1279 * Return the name of the thread in UTF-8.
1280 * Return NULL if the thread has no name.
1281 * The returned memory is owned by the caller.
1284 mono_thread_get_name_utf8 (MonoThread *thread)
1289 MonoInternalThread *internal = thread->internal_thread;
1290 if (internal == NULL)
1293 LOCK_THREAD (internal);
1295 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1297 UNLOCK_THREAD (internal);
1303 * mono_thread_get_managed_id:
1305 * Return the Thread.ManagedThreadId value of `thread`.
1306 * Returns -1 if `thread` is NULL.
1309 mono_thread_get_managed_id (MonoThread *thread)
1314 MonoInternalThread *internal = thread->internal_thread;
1315 if (internal == NULL)
1318 int32_t id = internal->managed_id;
1324 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1329 mono_error_init (&error);
1331 LOCK_THREAD (this_obj);
1333 if (!this_obj->name)
1336 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1338 UNLOCK_THREAD (this_obj);
1340 mono_error_raise_exception (&error);
1346 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1348 LOCK_THREAD (this_obj);
1350 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1351 UNLOCK_THREAD (this_obj);
1353 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1356 if (this_obj->name) {
1357 g_free (this_obj->name);
1358 this_obj->name_len = 0;
1361 this_obj->name = g_new (gunichar2, mono_string_length (name));
1362 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1363 this_obj->name_len = mono_string_length (name);
1366 this_obj->name = NULL;
1369 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1371 UNLOCK_THREAD (this_obj);
1373 if (this_obj->name && this_obj->tid) {
1374 char *tname = mono_string_to_utf8 (name);
1375 mono_profiler_thread_name (this_obj->tid, tname);
1376 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1382 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1384 mono_thread_set_name_internal (this_obj, name, TRUE);
1388 * ves_icall_System_Threading_Thread_GetPriority_internal:
1389 * @param this_obj: The MonoInternalThread on which to operate.
1391 * Gets the priority of the given thread.
1392 * @return: The priority of the given thread.
1395 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1398 MonoInternalThread *internal = this_obj->internal_thread;
1400 LOCK_THREAD (internal);
1401 priority = GetThreadPriority (internal->handle) + 2;
1402 UNLOCK_THREAD (internal);
1407 * ves_icall_System_Threading_Thread_SetPriority_internal:
1408 * @param this_obj: The MonoInternalThread on which to operate.
1409 * @param priority: The priority to set.
1411 * Sets the priority of the given thread.
1414 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1416 MonoInternalThread *internal = this_obj->internal_thread;
1418 LOCK_THREAD (internal);
1419 SetThreadPriority (internal->handle, priority - 2);
1420 UNLOCK_THREAD (internal);
1423 /* If the array is already in the requested domain, we just return it,
1424 otherwise we return a copy in that domain. */
1426 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1433 if (mono_object_domain (arr) == domain)
1436 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1437 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1442 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1444 return byte_array_to_domain (arr, mono_get_root_domain ());
1448 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1450 return byte_array_to_domain (arr, mono_domain_get ());
1454 mono_thread_current (void)
1457 MonoDomain *domain = mono_domain_get ();
1458 MonoInternalThread *internal = mono_thread_internal_current ();
1459 MonoThread **current_thread_ptr;
1461 g_assert (internal);
1462 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1464 if (!*current_thread_ptr) {
1465 g_assert (domain != mono_get_root_domain ());
1466 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1467 mono_error_raise_exception (&error); /* FIXME don't raise here */
1469 return *current_thread_ptr;
1472 /* Return the thread object belonging to INTERNAL in the current domain */
1474 mono_thread_current_for_thread (MonoInternalThread *internal)
1477 MonoDomain *domain = mono_domain_get ();
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;
1492 mono_thread_internal_current (void)
1494 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1495 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1500 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1502 MonoInternalThread *thread = this_obj->internal_thread;
1503 HANDLE handle = thread->handle;
1504 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1507 mono_thread_current_check_pending_interrupt ();
1509 LOCK_THREAD (thread);
1511 if ((thread->state & ThreadState_Unstarted) != 0) {
1512 UNLOCK_THREAD (thread);
1514 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1518 UNLOCK_THREAD (thread);
1523 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1525 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1527 MONO_PREPARE_BLOCKING;
1528 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1529 MONO_FINISH_BLOCKING;
1531 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1533 if(ret==WAIT_OBJECT_0) {
1534 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1539 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1545 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1553 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1555 MONO_PREPARE_BLOCKING;
1557 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1559 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1560 MONO_FINISH_BLOCKING;
1562 if (ret != WAIT_IO_COMPLETION)
1565 exc = mono_thread_execute_interruption ();
1567 mono_raise_exception (exc);
1572 /* Re-calculate ms according to the time passed */
1573 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1574 if (diff_ms >= ms) {
1578 wait = ms - diff_ms;
1584 /* FIXME: exitContext isnt documented */
1585 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1591 MonoObject *waitHandle;
1592 MonoInternalThread *thread = mono_thread_internal_current ();
1594 /* Do this WaitSleepJoin check before creating objects */
1595 mono_thread_current_check_pending_interrupt ();
1597 /* We fail in managed if the array has more than 64 elements */
1598 numhandles = (guint32)mono_array_length(mono_handles);
1599 handles = g_new0(HANDLE, numhandles);
1601 for(i = 0; i < numhandles; i++) {
1602 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1603 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1610 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1612 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1614 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1618 if(ret==WAIT_FAILED) {
1619 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1621 } else if(ret==WAIT_TIMEOUT) {
1622 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1629 /* FIXME: exitContext isnt documented */
1630 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1632 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1633 uintptr_t numhandles;
1636 MonoObject *waitHandle;
1637 MonoInternalThread *thread = mono_thread_internal_current ();
1639 /* Do this WaitSleepJoin check before creating objects */
1640 mono_thread_current_check_pending_interrupt ();
1642 numhandles = mono_array_length(mono_handles);
1643 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1646 for(i = 0; i < numhandles; i++) {
1647 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1648 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1655 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1657 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1659 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1661 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1664 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1666 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1667 return ret - WAIT_OBJECT_0;
1669 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1670 return ret - WAIT_ABANDONED_0;
1677 /* FIXME: exitContext isnt documented */
1678 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1681 MonoInternalThread *thread = mono_thread_internal_current ();
1683 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1689 mono_thread_current_check_pending_interrupt ();
1691 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1693 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1695 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1697 if(ret==WAIT_FAILED) {
1698 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1700 } else if(ret==WAIT_TIMEOUT) {
1701 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1709 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1712 MonoInternalThread *thread = mono_thread_internal_current ();
1717 mono_thread_current_check_pending_interrupt ();
1719 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1721 MONO_PREPARE_BLOCKING;
1722 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1723 MONO_FINISH_BLOCKING;
1725 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1727 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1730 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1737 mutex = CreateMutex (NULL, owned, NULL);
1739 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1741 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1749 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1750 return(ReleaseMutex (handle));
1753 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1759 *error = ERROR_SUCCESS;
1761 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1763 *error = GetLastError ();
1770 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1777 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1779 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1780 mono_string_chars (name));
1782 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1790 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1794 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1799 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1803 *error = ERROR_SUCCESS;
1805 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1807 *error = GetLastError ();
1813 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1820 event = CreateEvent (NULL, manual, initial, NULL);
1822 event = CreateEvent (NULL, manual, initial,
1823 mono_string_chars (name));
1825 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1833 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1834 return (SetEvent(handle));
1837 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1838 return (ResetEvent(handle));
1842 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1843 CloseHandle (handle);
1846 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1852 *error = ERROR_SUCCESS;
1854 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1856 *error = GetLastError ();
1862 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1864 return InterlockedIncrement (location);
1867 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1869 #if SIZEOF_VOID_P == 4
1870 if (G_UNLIKELY ((size_t)location & 0x7)) {
1872 mono_interlocked_lock ();
1875 mono_interlocked_unlock ();
1879 return InterlockedIncrement64 (location);
1882 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1884 return InterlockedDecrement(location);
1887 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1889 #if SIZEOF_VOID_P == 4
1890 if (G_UNLIKELY ((size_t)location & 0x7)) {
1892 mono_interlocked_lock ();
1895 mono_interlocked_unlock ();
1899 return InterlockedDecrement64 (location);
1902 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1904 return InterlockedExchange(location, value);
1907 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1910 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1911 mono_gc_wbarrier_generic_nostore (location);
1915 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1917 return InterlockedExchangePointer(location, value);
1920 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1922 IntFloatUnion val, ret;
1925 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1931 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1933 #if SIZEOF_VOID_P == 4
1934 if (G_UNLIKELY ((size_t)location & 0x7)) {
1936 mono_interlocked_lock ();
1939 mono_interlocked_unlock ();
1943 return InterlockedExchange64 (location, value);
1947 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1949 LongDoubleUnion val, ret;
1952 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1957 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1959 return InterlockedCompareExchange(location, value, comparand);
1962 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1964 gint32 r = InterlockedCompareExchange(location, value, comparand);
1965 *success = r == comparand;
1969 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1972 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1973 mono_gc_wbarrier_generic_nostore (location);
1977 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1979 return InterlockedCompareExchangePointer(location, value, comparand);
1982 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1984 IntFloatUnion val, ret, cmp;
1987 cmp.fval = comparand;
1988 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1994 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1996 #if SIZEOF_VOID_P == 8
1997 LongDoubleUnion val, comp, ret;
2000 comp.fval = comparand;
2001 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2007 mono_interlocked_lock ();
2009 if (old == comparand)
2011 mono_interlocked_unlock ();
2018 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2020 #if SIZEOF_VOID_P == 4
2021 if (G_UNLIKELY ((size_t)location & 0x7)) {
2023 mono_interlocked_lock ();
2025 if (old == comparand)
2027 mono_interlocked_unlock ();
2031 return InterlockedCompareExchange64 (location, value, comparand);
2035 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2038 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2039 mono_gc_wbarrier_generic_nostore (location);
2044 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2047 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2048 mono_gc_wbarrier_generic_nostore (location);
2053 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2055 return InterlockedAdd (location, value);
2059 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2061 #if SIZEOF_VOID_P == 4
2062 if (G_UNLIKELY ((size_t)location & 0x7)) {
2064 mono_interlocked_lock ();
2067 mono_interlocked_unlock ();
2071 return InterlockedAdd64 (location, value);
2075 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2077 #if SIZEOF_VOID_P == 4
2078 if (G_UNLIKELY ((size_t)location & 0x7)) {
2080 mono_interlocked_lock ();
2082 mono_interlocked_unlock ();
2086 return InterlockedRead64 (location);
2090 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2092 mono_memory_barrier ();
2096 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2098 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2100 if (state & ThreadState_Background) {
2101 /* If the thread changes the background mode, the main thread has to
2102 * be notified, since it has to rebuild the list of threads to
2105 SetEvent (background_change_event);
2110 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2112 mono_thread_set_state (this_obj, (MonoThreadState)state);
2114 if (state & ThreadState_Background) {
2115 /* If the thread changes the background mode, the main thread has to
2116 * be notified, since it has to rebuild the list of threads to
2119 SetEvent (background_change_event);
2124 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2128 LOCK_THREAD (this_obj);
2130 state = this_obj->state;
2132 UNLOCK_THREAD (this_obj);
2137 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2139 MonoInternalThread *current;
2141 MonoInternalThread *thread = this_obj->internal_thread;
2143 LOCK_THREAD (thread);
2145 current = mono_thread_internal_current ();
2147 thread->thread_interrupt_requested = TRUE;
2148 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2150 UNLOCK_THREAD (thread);
2153 abort_thread_internal (thread, TRUE, FALSE);
2157 void mono_thread_current_check_pending_interrupt ()
2159 MonoInternalThread *thread = mono_thread_internal_current ();
2160 gboolean throw_ = FALSE;
2162 LOCK_THREAD (thread);
2164 if (thread->thread_interrupt_requested) {
2166 thread->thread_interrupt_requested = FALSE;
2169 UNLOCK_THREAD (thread);
2172 mono_raise_exception (mono_get_exception_thread_interrupted ());
2177 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2179 LOCK_THREAD (thread);
2181 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2182 (thread->state & ThreadState_StopRequested) != 0 ||
2183 (thread->state & ThreadState_Stopped) != 0)
2185 UNLOCK_THREAD (thread);
2189 if ((thread->state & ThreadState_Unstarted) != 0) {
2190 thread->state |= ThreadState_Aborted;
2191 UNLOCK_THREAD (thread);
2195 thread->state |= ThreadState_AbortRequested;
2196 if (thread->abort_state_handle)
2197 mono_gchandle_free (thread->abort_state_handle);
2199 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2200 g_assert (thread->abort_state_handle);
2202 thread->abort_state_handle = 0;
2204 thread->abort_exc = NULL;
2206 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));
2208 /* During shutdown, we can't wait for other threads */
2210 /* Make sure the thread is awake */
2211 mono_thread_resume (thread);
2213 UNLOCK_THREAD (thread);
2215 abort_thread_internal (thread, TRUE, TRUE);
2219 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2221 MonoInternalThread *thread = mono_thread_internal_current ();
2222 gboolean was_aborting;
2224 LOCK_THREAD (thread);
2225 was_aborting = thread->state & ThreadState_AbortRequested;
2226 thread->state &= ~ThreadState_AbortRequested;
2227 UNLOCK_THREAD (thread);
2229 if (!was_aborting) {
2230 const char *msg = "Unable to reset abort because no abort was requested";
2231 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2234 thread->abort_exc = NULL;
2235 if (thread->abort_state_handle) {
2236 mono_gchandle_free (thread->abort_state_handle);
2237 /* This is actually not necessary - the handle
2238 only counts if the exception is set */
2239 thread->abort_state_handle = 0;
2244 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2246 LOCK_THREAD (thread);
2248 thread->state &= ~ThreadState_AbortRequested;
2250 if (thread->abort_exc) {
2251 thread->abort_exc = NULL;
2252 if (thread->abort_state_handle) {
2253 mono_gchandle_free (thread->abort_state_handle);
2254 /* This is actually not necessary - the handle
2255 only counts if the exception is set */
2256 thread->abort_state_handle = 0;
2260 UNLOCK_THREAD (thread);
2264 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2266 MonoInternalThread *thread = this_obj->internal_thread;
2267 MonoObject *state, *deserialized = NULL, *exc;
2270 if (!thread->abort_state_handle)
2273 state = mono_gchandle_get_target (thread->abort_state_handle);
2276 domain = mono_domain_get ();
2277 if (mono_object_domain (state) == domain)
2280 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2282 if (!deserialized) {
2283 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2285 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2286 mono_set_pending_exception (invalid_op_exc);
2290 return deserialized;
2294 mono_thread_suspend (MonoInternalThread *thread)
2296 LOCK_THREAD (thread);
2298 if ((thread->state & ThreadState_Unstarted) != 0 ||
2299 (thread->state & ThreadState_Aborted) != 0 ||
2300 (thread->state & ThreadState_Stopped) != 0)
2302 UNLOCK_THREAD (thread);
2306 if ((thread->state & ThreadState_Suspended) != 0 ||
2307 (thread->state & ThreadState_SuspendRequested) != 0 ||
2308 (thread->state & ThreadState_StopRequested) != 0)
2310 UNLOCK_THREAD (thread);
2314 thread->state |= ThreadState_SuspendRequested;
2315 suspend_thread_internal (thread, FALSE);
2320 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2322 if (!mono_thread_suspend (this_obj->internal_thread)) {
2323 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2328 /* LOCKING: LOCK_THREAD(thread) must be held */
2330 mono_thread_resume (MonoInternalThread *thread)
2332 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2333 thread->state &= ~ThreadState_SuspendRequested;
2337 if ((thread->state & ThreadState_Suspended) == 0 ||
2338 (thread->state & ThreadState_Unstarted) != 0 ||
2339 (thread->state & ThreadState_Aborted) != 0 ||
2340 (thread->state & ThreadState_Stopped) != 0)
2345 UNLOCK_THREAD (thread);
2347 /* Awake the thread */
2348 if (!mono_thread_info_resume (thread_get_tid (thread)))
2351 LOCK_THREAD (thread);
2353 thread->state &= ~ThreadState_Suspended;
2359 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2361 if (!thread->internal_thread) {
2362 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2364 LOCK_THREAD (thread->internal_thread);
2365 if (!mono_thread_resume (thread->internal_thread))
2366 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2367 UNLOCK_THREAD (thread->internal_thread);
2372 mono_threads_is_critical_method (MonoMethod *method)
2374 switch (method->wrapper_type) {
2375 case MONO_WRAPPER_RUNTIME_INVOKE:
2376 case MONO_WRAPPER_XDOMAIN_INVOKE:
2377 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2384 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2389 if (mono_threads_is_critical_method (m)) {
2390 *((gboolean*)data) = TRUE;
2397 is_running_protected_wrapper (void)
2399 gboolean found = FALSE;
2400 mono_stack_walk (find_wrapper, &found);
2404 void mono_thread_internal_stop (MonoInternalThread *thread)
2406 LOCK_THREAD (thread);
2408 if ((thread->state & ThreadState_StopRequested) != 0 ||
2409 (thread->state & ThreadState_Stopped) != 0)
2411 UNLOCK_THREAD (thread);
2415 /* Make sure the thread is awake */
2416 mono_thread_resume (thread);
2418 thread->state |= ThreadState_StopRequested;
2419 thread->state &= ~ThreadState_AbortRequested;
2421 UNLOCK_THREAD (thread);
2423 abort_thread_internal (thread, TRUE, TRUE);
2426 void mono_thread_stop (MonoThread *thread)
2428 mono_thread_internal_stop (thread->internal_thread);
2432 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2434 gint8 tmp = *(volatile gint8 *)ptr;
2435 mono_memory_barrier ();
2440 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2442 gint16 tmp = *(volatile gint16 *)ptr;
2443 mono_memory_barrier ();
2448 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2450 gint32 tmp = *(volatile gint32 *)ptr;
2451 mono_memory_barrier ();
2456 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2458 gint64 tmp = *(volatile gint64 *)ptr;
2459 mono_memory_barrier ();
2464 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2466 volatile void *tmp = *(volatile void **)ptr;
2467 mono_memory_barrier ();
2468 return (void *) tmp;
2472 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2474 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2475 mono_memory_barrier ();
2476 return (MonoObject *) tmp;
2480 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2482 double tmp = *(volatile double *)ptr;
2483 mono_memory_barrier ();
2488 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2490 float tmp = *(volatile float *)ptr;
2491 mono_memory_barrier ();
2496 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2498 return InterlockedRead8 ((volatile gint8 *)ptr);
2502 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2504 return InterlockedRead16 ((volatile gint16 *)ptr);
2508 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2510 return InterlockedRead ((volatile gint32 *)ptr);
2514 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2516 #if SIZEOF_VOID_P == 4
2517 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2519 mono_interlocked_lock ();
2520 val = *(gint64*)ptr;
2521 mono_interlocked_unlock ();
2525 return InterlockedRead64 ((volatile gint64 *)ptr);
2529 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2531 return InterlockedReadPointer ((volatile gpointer *)ptr);
2535 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2539 #if SIZEOF_VOID_P == 4
2540 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2542 mono_interlocked_lock ();
2543 val = *(double*)ptr;
2544 mono_interlocked_unlock ();
2549 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2555 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2559 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2565 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2567 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2571 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2573 mono_memory_barrier ();
2574 *(volatile gint8 *)ptr = value;
2578 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2580 mono_memory_barrier ();
2581 *(volatile gint16 *)ptr = value;
2585 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2587 mono_memory_barrier ();
2588 *(volatile gint32 *)ptr = value;
2592 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2594 mono_memory_barrier ();
2595 *(volatile gint64 *)ptr = value;
2599 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2601 mono_memory_barrier ();
2602 *(volatile void **)ptr = value;
2606 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2608 mono_memory_barrier ();
2609 mono_gc_wbarrier_generic_store (ptr, value);
2613 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2615 mono_memory_barrier ();
2616 *(volatile double *)ptr = value;
2620 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2622 mono_memory_barrier ();
2623 *(volatile float *)ptr = value;
2627 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2629 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2633 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2635 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2639 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2641 InterlockedWrite ((volatile gint32 *)ptr, value);
2645 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2647 #if SIZEOF_VOID_P == 4
2648 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2649 mono_interlocked_lock ();
2650 *(gint64*)ptr = value;
2651 mono_interlocked_unlock ();
2656 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2660 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2662 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2666 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2670 #if SIZEOF_VOID_P == 4
2671 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2672 mono_interlocked_lock ();
2673 *(double*)ptr = value;
2674 mono_interlocked_unlock ();
2681 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2685 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2691 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2695 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2697 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2701 free_context (void *user_data)
2703 ContextStaticData *data = user_data;
2705 mono_threads_lock ();
2708 * There is no guarantee that, by the point this reference queue callback
2709 * has been invoked, the GC handle associated with the object will fail to
2710 * resolve as one might expect. So if we don't free and remove the GC
2711 * handle here, free_context_static_data_helper () could end up resolving
2712 * a GC handle to an actually-dead context which would contain a pointer
2713 * to an already-freed static data segment, resulting in a crash when
2716 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2718 mono_threads_unlock ();
2720 mono_gchandle_free (data->gc_handle);
2721 mono_free_static_data (data->static_data);
2726 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2728 mono_threads_lock ();
2730 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2733 contexts = g_hash_table_new (NULL, NULL);
2736 context_queue = mono_gc_reference_queue_new (free_context);
2738 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2739 g_hash_table_insert (contexts, gch, gch);
2742 * We use this intermediate structure to contain a duplicate pointer to
2743 * the static data because we can't rely on being able to resolve the GC
2744 * handle in the reference queue callback.
2746 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2747 data->gc_handle = GPOINTER_TO_UINT (gch);
2750 context_adjust_static_data (ctx);
2751 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2753 mono_threads_unlock ();
2755 mono_profiler_context_loaded (ctx);
2759 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2762 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2763 * cleanup in exceptional circumstances, we don't actually do any
2764 * cleanup work here. We instead do this via a reference queue.
2767 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2769 mono_profiler_context_unloaded (ctx);
2773 mono_thread_init_tls (void)
2775 MONO_FAST_TLS_INIT (tls_current_object);
2776 mono_native_tls_alloc (¤t_object_key, NULL);
2779 void mono_thread_init (MonoThreadStartCB start_cb,
2780 MonoThreadAttachCB attach_cb)
2782 mono_coop_mutex_init_recursive (&threads_mutex);
2784 mono_os_mutex_init_recursive(&interlocked_mutex);
2785 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2787 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2788 g_assert(background_change_event != NULL);
2790 mono_init_static_data_info (&thread_static_info);
2791 mono_init_static_data_info (&context_static_info);
2793 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2795 mono_thread_start_cb = start_cb;
2796 mono_thread_attach_cb = attach_cb;
2798 /* Get a pseudo handle to the current process. This is just a
2799 * kludge so that wapi can build a process handle if needed.
2800 * As a pseudo handle is returned, we don't need to clean
2803 GetCurrentProcess ();
2806 void mono_thread_cleanup (void)
2808 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2809 MonoThreadInfo *info;
2811 /* The main thread must abandon any held mutexes (particularly
2812 * important for named mutexes as they are shared across
2813 * processes, see bug 74680.) This will happen when the
2814 * thread exits, but if it's not running in a subthread it
2815 * won't exit in time.
2817 info = mono_thread_info_current ();
2818 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2822 /* This stuff needs more testing, it seems one of these
2823 * critical sections can be locked when mono_thread_cleanup is
2826 mono_coop_mutex_destroy (&threads_mutex);
2827 mono_os_mutex_destroy (&interlocked_mutex);
2828 mono_os_mutex_destroy (&delayed_free_table_mutex);
2829 mono_os_mutex_destroy (&small_id_mutex);
2830 CloseHandle (background_change_event);
2833 mono_native_tls_free (current_object_key);
2837 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2839 mono_thread_cleanup_fn = func;
2843 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2845 thread->internal_thread->manage_callback = func;
2848 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2850 mono_thread_notify_pending_exc_fn = func;
2854 static void print_tids (gpointer key, gpointer value, gpointer user)
2856 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2857 * sizeof(uint) and a cast to uint would overflow
2859 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2860 * print this as a pointer.
2862 g_message ("Waiting for: %p", key);
2867 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2868 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2872 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2876 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2878 MONO_PREPARE_BLOCKING;
2879 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2880 MONO_FINISH_BLOCKING;
2882 if(ret==WAIT_FAILED) {
2883 /* See the comment in build_wait_tids() */
2884 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2888 for(i=0; i<wait->num; i++)
2889 CloseHandle (wait->handles[i]);
2891 if (ret == WAIT_TIMEOUT)
2894 for(i=0; i<wait->num; i++) {
2895 gsize tid = wait->threads[i]->tid;
2898 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2899 * it can still run io-layer etc. code. So wait for it to really exit.
2900 * FIXME: This won't join threads which are not in the joinable_hash yet.
2902 mono_thread_join ((gpointer)tid);
2904 mono_threads_lock ();
2905 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2906 /* This thread must have been killed, because
2907 * it hasn't cleaned itself up. (It's just
2908 * possible that the thread exited before the
2909 * parent thread had a chance to store the
2910 * handle, and now there is another pointer to
2911 * the already-exited thread stored. In this
2912 * case, we'll just get two
2913 * mono_profiler_thread_end() calls for the
2917 mono_threads_unlock ();
2918 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2919 thread_cleanup (wait->threads[i]);
2921 mono_threads_unlock ();
2926 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2928 guint32 i, ret, count;
2930 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2932 /* Add the thread state change event, so it wakes up if a thread changes
2933 * to background mode.
2936 if (count < MAXIMUM_WAIT_OBJECTS) {
2937 wait->handles [count] = background_change_event;
2941 MONO_PREPARE_BLOCKING;
2942 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2943 MONO_FINISH_BLOCKING;
2945 if(ret==WAIT_FAILED) {
2946 /* See the comment in build_wait_tids() */
2947 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2951 for(i=0; i<wait->num; i++)
2952 CloseHandle (wait->handles[i]);
2954 if (ret == WAIT_TIMEOUT)
2957 if (ret < wait->num) {
2958 gsize tid = wait->threads[ret]->tid;
2959 mono_threads_lock ();
2960 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2961 /* See comment in wait_for_tids about thread cleanup */
2962 mono_threads_unlock ();
2963 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2964 thread_cleanup (wait->threads [ret]);
2966 mono_threads_unlock ();
2970 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2972 struct wait_data *wait=(struct wait_data *)user;
2974 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2976 MonoInternalThread *thread=(MonoInternalThread *)value;
2978 /* Ignore background threads, we abort them later */
2979 /* Do not lock here since it is not needed and the caller holds threads_lock */
2980 if (thread->state & ThreadState_Background) {
2981 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2982 return; /* just leave, ignore */
2985 if (mono_gc_is_finalizer_internal_thread (thread)) {
2986 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2990 if (thread == mono_thread_internal_current ()) {
2991 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2995 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2996 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3000 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3001 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3005 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3006 if (handle == NULL) {
3007 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3011 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3012 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3013 wait->handles[wait->num]=handle;
3014 wait->threads[wait->num]=thread;
3017 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3019 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3024 /* Just ignore the rest, we can't do anything with
3031 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3033 struct wait_data *wait=(struct wait_data *)user;
3034 MonoNativeThreadId self = mono_native_thread_id_get ();
3035 MonoInternalThread *thread = (MonoInternalThread *)value;
3038 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3041 /* The finalizer thread is not a background thread */
3042 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3043 && (thread->state & ThreadState_Background) != 0
3044 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3046 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3050 /* printf ("A: %d\n", wait->num); */
3051 wait->handles[wait->num]=thread->handle;
3052 wait->threads[wait->num]=thread;
3055 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3056 mono_thread_internal_stop (thread);
3060 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3061 && !mono_gc_is_finalizer_internal_thread (thread);
3065 * mono_threads_set_shutting_down:
3067 * Is called by a thread that wants to shut down Mono. If the runtime is already
3068 * shutting down, the calling thread is suspended/stopped, and this function never
3072 mono_threads_set_shutting_down (void)
3074 MonoInternalThread *current_thread = mono_thread_internal_current ();
3076 mono_threads_lock ();
3078 if (shutting_down) {
3079 mono_threads_unlock ();
3081 /* Make sure we're properly suspended/stopped */
3083 LOCK_THREAD (current_thread);
3085 if ((current_thread->state & ThreadState_SuspendRequested) ||
3086 (current_thread->state & ThreadState_AbortRequested) ||
3087 (current_thread->state & ThreadState_StopRequested)) {
3088 UNLOCK_THREAD (current_thread);
3089 mono_thread_execute_interruption ();
3091 current_thread->state |= ThreadState_Stopped;
3092 UNLOCK_THREAD (current_thread);
3095 /*since we're killing the thread, unset the current domain.*/
3096 mono_domain_unset ();
3098 /* Wake up other threads potentially waiting for us */
3099 mono_thread_info_exit ();
3101 shutting_down = TRUE;
3103 /* Not really a background state change, but this will
3104 * interrupt the main thread if it is waiting for all
3105 * the other threads.
3107 SetEvent (background_change_event);
3109 mono_threads_unlock ();
3113 void mono_thread_manage (void)
3115 struct wait_data wait_data;
3116 struct wait_data *wait = &wait_data;
3118 memset (wait, 0, sizeof (struct wait_data));
3119 /* join each thread that's still running */
3120 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3122 mono_threads_lock ();
3124 THREAD_DEBUG (g_message("%s: No threads", __func__));
3125 mono_threads_unlock ();
3128 mono_threads_unlock ();
3131 mono_threads_lock ();
3132 if (shutting_down) {
3133 /* somebody else is shutting down */
3134 mono_threads_unlock ();
3137 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3138 mono_g_hash_table_foreach (threads, print_tids, NULL));
3140 ResetEvent (background_change_event);
3142 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3143 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3144 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3145 mono_threads_unlock ();
3147 /* Something to wait for */
3148 wait_for_tids_or_state_change (wait, INFINITE);
3150 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3151 } while(wait->num>0);
3153 /* Mono is shutting down, so just wait for the end */
3154 if (!mono_runtime_try_shutdown ()) {
3155 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3156 mono_thread_suspend (mono_thread_internal_current ());
3157 mono_thread_execute_interruption ();
3161 * Remove everything but the finalizer thread and self.
3162 * Also abort all the background threads
3165 mono_threads_lock ();
3168 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3169 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3170 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3172 mono_threads_unlock ();
3174 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3176 /* Something to wait for */
3177 wait_for_tids (wait, INFINITE);
3179 } while (wait->num > 0);
3182 * give the subthreads a chance to really quit (this is mainly needed
3183 * to get correct user and system times from getrusage/wait/time(1)).
3184 * This could be removed if we avoid pthread_detach() and use pthread_join().
3186 mono_thread_info_yield ();
3190 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3192 MonoInternalThread *thread = (MonoInternalThread*)value;
3193 struct wait_data *wait = (struct wait_data*)user_data;
3197 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3199 * This needs no locking.
3201 if ((thread->state & ThreadState_Suspended) != 0 ||
3202 (thread->state & ThreadState_Stopped) != 0)
3205 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3206 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3210 wait->handles [wait->num] = handle;
3211 wait->threads [wait->num] = thread;
3217 * mono_thread_suspend_all_other_threads:
3219 * Suspend all managed threads except the finalizer thread and this thread. It is
3220 * not possible to resume them later.
3222 void mono_thread_suspend_all_other_threads (void)
3224 struct wait_data wait_data;
3225 struct wait_data *wait = &wait_data;
3227 MonoNativeThreadId self = mono_native_thread_id_get ();
3228 guint32 eventidx = 0;
3229 gboolean starting, finished;
3231 memset (wait, 0, sizeof (struct wait_data));
3233 * The other threads could be in an arbitrary state at this point, i.e.
3234 * they could be starting up, shutting down etc. This means that there could be
3235 * threads which are not even in the threads hash table yet.
3239 * First we set a barrier which will be checked by all threads before they
3240 * are added to the threads hash table, and they will exit if the flag is set.
3241 * This ensures that no threads could be added to the hash later.
3242 * We will use shutting_down as the barrier for now.
3244 g_assert (shutting_down);
3247 * We make multiple calls to WaitForMultipleObjects since:
3248 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3249 * - some threads could exit without becoming suspended
3254 * Make a copy of the hashtable since we can't do anything with
3255 * threads while threads_mutex is held.
3258 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3259 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3260 mono_threads_lock ();
3261 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3262 mono_threads_unlock ();
3265 /* Get the suspended events that we'll be waiting for */
3266 for (i = 0; i < wait->num; ++i) {
3267 MonoInternalThread *thread = wait->threads [i];
3269 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3270 || mono_gc_is_finalizer_internal_thread (thread)
3271 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3273 //CloseHandle (wait->handles [i]);
3274 wait->threads [i] = NULL; /* ignore this thread in next loop */
3278 LOCK_THREAD (thread);
3280 if ((thread->state & ThreadState_Suspended) != 0 ||
3281 (thread->state & ThreadState_StopRequested) != 0 ||
3282 (thread->state & ThreadState_Stopped) != 0) {
3283 UNLOCK_THREAD (thread);
3284 CloseHandle (wait->handles [i]);
3285 wait->threads [i] = NULL; /* ignore this thread in next loop */
3291 /* Convert abort requests into suspend requests */
3292 if ((thread->state & ThreadState_AbortRequested) != 0)
3293 thread->state &= ~ThreadState_AbortRequested;
3295 thread->state |= ThreadState_SuspendRequested;
3296 /* Signal the thread to suspend */
3297 suspend_thread_internal (thread, TRUE);
3299 if (eventidx <= 0) {
3301 * If there are threads which are starting up, we wait until they
3302 * are suspended when they try to register in the threads hash.
3303 * This is guaranteed to finish, since the threads which can create new
3304 * threads get suspended after a while.
3305 * FIXME: The finalizer thread can still create new threads.
3307 mono_threads_lock ();
3308 if (threads_starting_up)
3309 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3312 mono_threads_unlock ();
3314 mono_thread_info_sleep (100, NULL);
3322 MonoInternalThread *thread;
3323 MonoStackFrameInfo *frames;
3324 int nframes, max_frames;
3325 int nthreads, max_threads;
3326 MonoInternalThread **threads;
3327 } ThreadDumpUserData;
3329 static gboolean thread_dump_requested;
3331 /* This needs to be async safe */
3333 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3335 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3337 if (ud->nframes < ud->max_frames) {
3338 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3345 /* This needs to be async safe */
3346 static SuspendThreadResult
3347 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3349 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3350 MonoInternalThread *thread = user_data->thread;
3353 /* This no longer works with remote unwinding */
3355 wapi_desc = wapi_current_thread_desc ();
3356 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3361 if (thread == mono_thread_internal_current ())
3362 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3364 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3366 return MonoResumeThread;
3370 int nthreads, max_threads;
3371 MonoInternalThread **threads;
3372 } CollectThreadsUserData;
3375 collect_thread (gpointer key, gpointer value, gpointer user)
3377 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3378 MonoInternalThread *thread = (MonoInternalThread *)value;
3380 if (ud->nthreads < ud->max_threads)
3381 ud->threads [ud->nthreads ++] = thread;
3385 * Collect running threads into the THREADS array.
3386 * THREADS should be an array allocated on the stack.
3389 collect_threads (MonoInternalThread **thread_array, int max_threads)
3391 CollectThreadsUserData ud;
3393 memset (&ud, 0, sizeof (ud));
3394 /* This array contains refs, but its on the stack, so its ok */
3395 ud.threads = thread_array;
3396 ud.max_threads = max_threads;
3398 mono_threads_lock ();
3399 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3400 mono_threads_unlock ();
3406 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3408 GString* text = g_string_new (0);
3410 GError *error = NULL;
3413 ud->thread = thread;
3416 /* Collect frames for the thread */
3417 if (thread == mono_thread_internal_current ()) {
3418 get_thread_dump (mono_thread_info_current (), ud);
3420 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3424 * Do all the non async-safe work outside of get_thread_dump.
3427 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3429 g_string_append_printf (text, "\n\"%s\"", name);
3432 else if (thread->threadpool_thread) {
3433 g_string_append (text, "\n\"<threadpool thread>\"");
3435 g_string_append (text, "\n\"<unnamed thread>\"");
3438 for (i = 0; i < ud->nframes; ++i) {
3439 MonoStackFrameInfo *frame = &ud->frames [i];
3440 MonoMethod *method = NULL;
3442 if (frame->type == FRAME_TYPE_MANAGED)
3443 method = mono_jit_info_get_method (frame->ji);
3446 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3447 g_string_append_printf (text, " %s\n", location);
3450 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3454 fprintf (stdout, "%s", text->str);
3456 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3457 OutputDebugStringA(text->str);
3460 g_string_free (text, TRUE);
3465 mono_threads_perform_thread_dump (void)
3467 ThreadDumpUserData ud;
3468 MonoInternalThread *thread_array [128];
3469 int tindex, nthreads;
3471 if (!thread_dump_requested)
3474 printf ("Full thread dump:\n");
3476 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3477 nthreads = collect_threads (thread_array, 128);
3479 memset (&ud, 0, sizeof (ud));
3480 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3481 ud.max_frames = 256;
3483 for (tindex = 0; tindex < nthreads; ++tindex)
3484 dump_thread (thread_array [tindex], &ud);
3488 thread_dump_requested = FALSE;
3491 /* Obtain the thread dump of all threads */
3493 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3497 ThreadDumpUserData ud;
3498 MonoInternalThread *thread_array [128];
3499 MonoDomain *domain = mono_domain_get ();
3500 MonoDebugSourceLocation *location;
3501 int tindex, nthreads;
3503 mono_error_init (&error);
3505 *out_threads = NULL;
3506 *out_stack_frames = NULL;
3508 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3509 nthreads = collect_threads (thread_array, 128);
3511 memset (&ud, 0, sizeof (ud));
3512 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3513 ud.max_frames = 256;
3515 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3516 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3518 for (tindex = 0; tindex < nthreads; ++tindex) {
3519 MonoInternalThread *thread = thread_array [tindex];
3520 MonoArray *thread_frames;
3526 /* Collect frames for the thread */
3527 if (thread == mono_thread_internal_current ()) {
3528 get_thread_dump (mono_thread_info_current (), &ud);
3530 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3533 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3535 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3536 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3538 for (i = 0; i < ud.nframes; ++i) {
3539 MonoStackFrameInfo *frame = &ud.frames [i];
3540 MonoMethod *method = NULL;
3541 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3542 if (!mono_error_ok (&error))
3545 sf->native_offset = frame->native_offset;
3547 if (frame->type == FRAME_TYPE_MANAGED)
3548 method = mono_jit_info_get_method (frame->ji);
3551 sf->method_address = (gsize) frame->ji->code_start;
3553 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3554 mono_error_raise_exception (&error); /* FIXME don't raise here */
3555 MONO_OBJECT_SETREF (sf, method, rm);
3557 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3559 sf->il_offset = location->il_offset;
3561 if (location && location->source_file) {
3562 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3563 sf->line = location->row;
3564 sf->column = location->column;
3566 mono_debug_free_source_location (location);
3571 mono_array_setref (thread_frames, i, sf);
3577 mono_error_raise_exception (&error); /* FIXME don't raise here */
3581 * mono_threads_request_thread_dump:
3583 * Ask all threads except the current to print their stacktrace to stdout.
3586 mono_threads_request_thread_dump (void)
3588 /*The new thread dump code runs out of the finalizer thread. */
3589 thread_dump_requested = TRUE;
3590 mono_gc_finalize_notify ();
3595 gint allocated; /* +1 so that refs [allocated] == NULL */
3599 typedef struct ref_stack RefStack;
3602 ref_stack_new (gint initial_size)
3606 initial_size = MAX (initial_size, 16) + 1;
3607 rs = g_new0 (RefStack, 1);
3608 rs->refs = g_new0 (gpointer, initial_size);
3609 rs->allocated = initial_size;
3614 ref_stack_destroy (gpointer ptr)
3616 RefStack *rs = (RefStack *)ptr;
3625 ref_stack_push (RefStack *rs, gpointer ptr)
3627 g_assert (rs != NULL);
3629 if (rs->bottom >= rs->allocated) {
3630 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3631 rs->allocated <<= 1;
3632 rs->refs [rs->allocated] = NULL;
3634 rs->refs [rs->bottom++] = ptr;
3638 ref_stack_pop (RefStack *rs)
3640 if (rs == NULL || rs->bottom == 0)
3644 rs->refs [rs->bottom] = NULL;
3648 ref_stack_find (RefStack *rs, gpointer ptr)
3655 for (refs = rs->refs; refs && *refs; refs++) {
3663 * mono_thread_push_appdomain_ref:
3665 * Register that the current thread may have references to objects in domain
3666 * @domain on its stack. Each call to this function should be paired with a
3667 * call to pop_appdomain_ref.
3670 mono_thread_push_appdomain_ref (MonoDomain *domain)
3672 MonoInternalThread *thread = mono_thread_internal_current ();
3675 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3676 SPIN_LOCK (thread->lock_thread_id);
3677 if (thread->appdomain_refs == NULL)
3678 thread->appdomain_refs = ref_stack_new (16);
3679 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3680 SPIN_UNLOCK (thread->lock_thread_id);
3685 mono_thread_pop_appdomain_ref (void)
3687 MonoInternalThread *thread = mono_thread_internal_current ();
3690 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3691 SPIN_LOCK (thread->lock_thread_id);
3692 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3693 SPIN_UNLOCK (thread->lock_thread_id);
3698 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3701 SPIN_LOCK (thread->lock_thread_id);
3702 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3703 SPIN_UNLOCK (thread->lock_thread_id);
3708 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3710 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3713 typedef struct abort_appdomain_data {
3714 struct wait_data wait;
3716 } abort_appdomain_data;
3719 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3721 MonoInternalThread *thread = (MonoInternalThread*)value;
3722 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3723 MonoDomain *domain = data->domain;
3725 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3726 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3728 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3729 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3732 data->wait.handles [data->wait.num] = handle;
3733 data->wait.threads [data->wait.num] = thread;
3736 /* Just ignore the rest, we can't do anything with
3744 * mono_threads_abort_appdomain_threads:
3746 * Abort threads which has references to the given appdomain.
3749 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3751 #ifdef __native_client__
3755 abort_appdomain_data user_data;
3757 int orig_timeout = timeout;
3760 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3762 start_time = mono_msec_ticks ();
3764 mono_threads_lock ();
3766 user_data.domain = domain;
3767 user_data.wait.num = 0;
3768 /* This shouldn't take any locks */
3769 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3770 mono_threads_unlock ();
3772 if (user_data.wait.num > 0) {
3773 /* Abort the threads outside the threads lock */
3774 for (i = 0; i < user_data.wait.num; ++i)
3775 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3778 * We should wait for the threads either to abort, or to leave the
3779 * domain. We can't do the latter, so we wait with a timeout.
3781 wait_for_tids (&user_data.wait, 100);
3784 /* Update remaining time */
3785 timeout -= mono_msec_ticks () - start_time;
3786 start_time = mono_msec_ticks ();
3788 if (orig_timeout != -1 && timeout < 0)
3791 while (user_data.wait.num > 0);
3793 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3799 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3801 MonoInternalThread *thread = (MonoInternalThread*)value;
3802 MonoDomain *domain = (MonoDomain*)user_data;
3805 /* No locking needed here */
3806 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3808 if (thread->cached_culture_info) {
3809 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3810 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3811 if (obj && obj->vtable->domain == domain)
3812 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3818 * mono_threads_clear_cached_culture:
3820 * Clear the cached_current_culture from all threads if it is in the
3824 mono_threads_clear_cached_culture (MonoDomain *domain)
3826 mono_threads_lock ();
3827 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3828 mono_threads_unlock ();
3832 * mono_thread_get_undeniable_exception:
3834 * Return an exception which needs to be raised when leaving a catch clause.
3835 * This is used for undeniable exception propagation.
3838 mono_thread_get_undeniable_exception (void)
3840 MonoInternalThread *thread = mono_thread_internal_current ();
3842 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3844 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3845 * exception if the thread no longer references a dying appdomain.
3847 thread->abort_exc->trace_ips = NULL;
3848 thread->abort_exc->stack_trace = NULL;
3849 return thread->abort_exc;
3855 #if MONO_SMALL_CONFIG
3856 #define NUM_STATIC_DATA_IDX 4
3857 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3861 #define NUM_STATIC_DATA_IDX 8
3862 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3863 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3867 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3868 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3871 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3873 gpointer *static_data = (gpointer *)addr;
3875 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3876 void **ptr = (void **)static_data [i];
3881 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3882 void **p = ptr + idx;
3885 mark_func ((MonoObject**)p, gc_data);
3891 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3893 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3897 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3899 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3903 * mono_alloc_static_data
3905 * Allocate memory blocks for storing threads or context static data
3908 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3910 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3913 gpointer* static_data = *static_data_ptr;
3915 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3916 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3918 if (mono_gc_user_markers_supported ()) {
3919 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3920 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3922 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3923 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3926 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3927 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3928 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3929 *static_data_ptr = static_data;
3930 static_data [0] = static_data;
3933 for (i = 1; i <= idx; ++i) {
3934 if (static_data [i])
3937 if (mono_gc_user_markers_supported ())
3938 static_data [i] = g_malloc0 (static_data_size [i]);
3940 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3941 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3942 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3947 mono_free_static_data (gpointer* static_data)
3950 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3951 gpointer p = static_data [i];
3955 * At this point, the static data pointer array is still registered with the
3956 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3957 * data. Freeing the individual arrays without first nulling their slots
3958 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3959 * such an already freed array. See bug #13813.
3961 static_data [i] = NULL;
3962 mono_memory_write_barrier ();
3963 if (mono_gc_user_markers_supported ())
3966 mono_gc_free_fixed (p);
3968 mono_gc_free_fixed (static_data);
3972 * mono_init_static_data_info
3974 * Initializes static data counters
3976 static void mono_init_static_data_info (StaticDataInfo *static_data)
3978 static_data->idx = 0;
3979 static_data->offset = 0;
3980 static_data->freelist = NULL;
3984 * mono_alloc_static_data_slot
3986 * Generates an offset for static data. static_data contains the counters
3987 * used to generate it.
3990 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3992 if (!static_data->idx && !static_data->offset) {
3994 * we use the first chunk of the first allocation also as
3995 * an array for the rest of the data
3997 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3999 static_data->offset += align - 1;
4000 static_data->offset &= ~(align - 1);
4001 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4002 static_data->idx ++;
4003 g_assert (size <= static_data_size [static_data->idx]);
4004 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4005 static_data->offset = 0;
4007 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4008 static_data->offset += size;
4013 * ensure thread static fields already allocated are valid for thread
4014 * This function is called when a thread is created or on thread attach.
4017 thread_adjust_static_data (MonoInternalThread *thread)
4019 mono_threads_lock ();
4020 if (thread_static_info.offset || thread_static_info.idx > 0) {
4021 /* get the current allocated size */
4022 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4023 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4025 mono_threads_unlock ();
4029 * LOCKING: requires that threads_mutex is held
4032 context_adjust_static_data (MonoAppContext *ctx)
4034 if (context_static_info.offset || context_static_info.idx > 0) {
4035 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4036 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4037 ctx->data->static_data = ctx->static_data;
4042 * LOCKING: requires that threads_mutex is held
4045 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4047 MonoInternalThread *thread = (MonoInternalThread *)value;
4048 guint32 offset = GPOINTER_TO_UINT (user);
4050 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4054 * LOCKING: requires that threads_mutex is held
4057 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4059 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4064 guint32 offset = GPOINTER_TO_UINT (user);
4065 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4066 ctx->data->static_data = ctx->static_data;
4069 static StaticDataFreeList*
4070 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4072 StaticDataFreeList* prev = NULL;
4073 StaticDataFreeList* tmp = static_data->freelist;
4075 if (tmp->size == size) {
4077 prev->next = tmp->next;
4079 static_data->freelist = tmp->next;
4088 #if SIZEOF_VOID_P == 4
4095 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4097 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4099 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4100 MonoBitSet *rb = sets [idx];
4101 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4102 offset /= sizeof (uintptr_t);
4103 /* offset is now the bitmap offset */
4104 for (int i = 0; i < numbits; ++i) {
4105 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4106 mono_bitset_set_fast (rb, offset + i);
4111 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4113 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4114 MonoBitSet *rb = sets [idx];
4115 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4116 offset /= sizeof (uintptr_t);
4117 /* offset is now the bitmap offset */
4118 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4119 mono_bitset_clear_fast (rb, offset + i);
4123 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4125 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4127 StaticDataInfo *info;
4130 if (static_type == SPECIAL_STATIC_THREAD) {
4131 info = &thread_static_info;
4132 sets = thread_reference_bitmaps;
4134 info = &context_static_info;
4135 sets = context_reference_bitmaps;
4138 mono_threads_lock ();
4140 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4144 offset = item->offset;
4147 offset = mono_alloc_static_data_slot (info, size, align);
4150 update_reference_bitmap (sets, offset, bitmap, numbits);
4152 if (static_type == SPECIAL_STATIC_THREAD) {
4153 /* This can be called during startup */
4154 if (threads != NULL)
4155 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4157 if (contexts != NULL)
4158 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4160 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4163 mono_threads_unlock ();
4169 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4171 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4173 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4174 return get_thread_static_data (thread, offset);
4176 return get_context_static_data (thread->current_appcontext, offset);
4181 mono_get_special_static_data (guint32 offset)
4183 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4192 * LOCKING: requires that threads_mutex is held
4195 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4197 MonoInternalThread *thread = (MonoInternalThread *)value;
4198 OffsetSize *data = (OffsetSize *)user;
4199 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4200 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4203 if (!thread->static_data || !thread->static_data [idx])
4205 ptr = ((char*) thread->static_data [idx]) + off;
4206 mono_gc_bzero_atomic (ptr, data->size);
4210 * LOCKING: requires that threads_mutex is held
4213 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4215 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4220 OffsetSize *data = (OffsetSize *)user;
4221 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4222 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4225 if (!ctx->static_data || !ctx->static_data [idx])
4228 ptr = ((char*) ctx->static_data [idx]) + off;
4229 mono_gc_bzero_atomic (ptr, data->size);
4233 do_free_special_slot (guint32 offset, guint32 size)
4235 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4237 StaticDataInfo *info;
4239 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4240 info = &thread_static_info;
4241 sets = thread_reference_bitmaps;
4243 info = &context_static_info;
4244 sets = context_reference_bitmaps;
4247 guint32 data_offset = offset;
4248 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4249 OffsetSize data = { data_offset, size };
4251 clear_reference_bitmap (sets, data.offset, data.size);
4253 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4254 if (threads != NULL)
4255 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4257 if (contexts != NULL)
4258 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4261 if (!mono_runtime_is_shutting_down ()) {
4262 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4264 item->offset = offset;
4267 item->next = info->freelist;
4268 info->freelist = item;
4273 do_free_special (gpointer key, gpointer value, gpointer data)
4275 MonoClassField *field = (MonoClassField *)key;
4276 guint32 offset = GPOINTER_TO_UINT (value);
4279 size = mono_type_size (field->type, &align);
4280 do_free_special_slot (offset, size);
4284 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4286 mono_threads_lock ();
4288 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4290 mono_threads_unlock ();
4294 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4296 /* Only ever called for ThreadLocal instances */
4297 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4299 mono_threads_lock ();
4300 do_free_special_slot (offset, size);
4301 mono_threads_unlock ();
4305 static void CALLBACK dummy_apc (ULONG_PTR param)
4311 * mono_thread_execute_interruption
4313 * Performs the operation that the requested thread state requires (abort,
4316 static MonoException*
4317 mono_thread_execute_interruption (void)
4319 MonoInternalThread *thread = mono_thread_internal_current ();
4321 LOCK_THREAD (thread);
4323 /* MonoThread::interruption_requested can only be changed with atomics */
4324 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4325 /* this will consume pending APC calls */
4327 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4329 InterlockedDecrement (&thread_interruption_requested);
4331 /* Clear the interrupted flag of the thread so it can wait again */
4332 mono_thread_info_clear_self_interrupt ();
4335 if ((thread->state & ThreadState_AbortRequested) != 0) {
4336 UNLOCK_THREAD (thread);
4337 if (thread->abort_exc == NULL) {
4339 * This might be racy, but it has to be called outside the lock
4340 * since it calls managed code.
4342 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4344 return thread->abort_exc;
4346 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4347 self_suspend_internal (thread);
4350 else if ((thread->state & ThreadState_StopRequested) != 0) {
4351 /* FIXME: do this through the JIT? */
4353 UNLOCK_THREAD (thread);
4355 mono_thread_exit ();
4357 } else if (thread->pending_exception) {
4360 exc = thread->pending_exception;
4361 thread->pending_exception = NULL;
4363 UNLOCK_THREAD (thread);
4365 } else if (thread->thread_interrupt_requested) {
4367 thread->thread_interrupt_requested = FALSE;
4368 UNLOCK_THREAD (thread);
4370 return(mono_get_exception_thread_interrupted ());
4373 UNLOCK_THREAD (thread);
4379 * mono_thread_request_interruption
4381 * A signal handler can call this method to request the interruption of a
4382 * thread. The result of the interruption will depend on the current state of
4383 * the thread. If the result is an exception that needs to be throw, it is
4384 * provided as return value.
4387 mono_thread_request_interruption (gboolean running_managed)
4389 MonoInternalThread *thread = mono_thread_internal_current ();
4391 /* The thread may already be stopping */
4396 if (thread->interrupt_on_stop &&
4397 thread->state & ThreadState_StopRequested &&
4398 thread->state & ThreadState_Background)
4402 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4404 InterlockedIncrement (&thread_interruption_requested);
4406 if (!running_managed || is_running_protected_wrapper ()) {
4407 /* Can't stop while in unmanaged code. Increase the global interruption
4408 request count. When exiting the unmanaged method the count will be
4409 checked and the thread will be interrupted. */
4411 if (mono_thread_notify_pending_exc_fn && !running_managed)
4412 /* The JIT will notify the thread about the interruption */
4413 /* This shouldn't take any locks */
4414 mono_thread_notify_pending_exc_fn (NULL);
4416 /* this will awake the thread if it is in WaitForSingleObject
4418 /* Our implementation of this function ignores the func argument */
4420 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4422 mono_thread_info_self_interrupt ();
4427 return mono_thread_execute_interruption ();
4431 /*This function should be called by a thread after it has exited all of
4432 * its handle blocks at interruption time.*/
4434 mono_thread_resume_interruption (void)
4436 MonoInternalThread *thread = mono_thread_internal_current ();
4437 gboolean still_aborting;
4439 /* The thread may already be stopping */
4443 LOCK_THREAD (thread);
4444 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4445 UNLOCK_THREAD (thread);
4447 /*This can happen if the protected block called Thread::ResetAbort*/
4448 if (!still_aborting)
4451 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4453 InterlockedIncrement (&thread_interruption_requested);
4455 mono_thread_info_self_interrupt ();
4457 return mono_thread_execute_interruption ();
4460 gboolean mono_thread_interruption_requested ()
4462 if (thread_interruption_requested) {
4463 MonoInternalThread *thread = mono_thread_internal_current ();
4464 /* The thread may already be stopping */
4466 return (thread->interruption_requested);
4471 static MonoException*
4472 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4474 MonoInternalThread *thread = mono_thread_internal_current ();
4476 /* The thread may already be stopping */
4480 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4481 MonoException* exc = mono_thread_execute_interruption ();
4489 * Performs the interruption of the current thread, if one has been requested,
4490 * and the thread is not running a protected wrapper.
4491 * Return the exception which needs to be thrown, if any.
4494 mono_thread_interruption_checkpoint (void)
4496 return mono_thread_interruption_checkpoint_request (FALSE);
4500 * Performs the interruption of the current thread, if one has been requested.
4501 * Return the exception which needs to be thrown, if any.
4504 mono_thread_force_interruption_checkpoint_noraise (void)
4506 return mono_thread_interruption_checkpoint_request (TRUE);
4510 * mono_thread_get_and_clear_pending_exception:
4512 * Return any pending exceptions for the current thread and clear it as a side effect.
4515 mono_thread_get_and_clear_pending_exception (void)
4517 MonoInternalThread *thread = mono_thread_internal_current ();
4519 /* The thread may already be stopping */
4523 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4524 return mono_thread_execute_interruption ();
4527 if (thread->pending_exception) {
4528 MonoException *exc = thread->pending_exception;
4530 thread->pending_exception = NULL;
4538 * mono_set_pending_exception:
4540 * Set the pending exception of the current thread to EXC.
4541 * The exception will be thrown when execution returns to managed code.
4544 mono_set_pending_exception (MonoException *exc)
4546 MonoInternalThread *thread = mono_thread_internal_current ();
4548 /* The thread may already be stopping */
4552 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4554 mono_thread_request_interruption (FALSE);
4558 * mono_thread_interruption_request_flag:
4560 * Returns the address of a flag that will be non-zero if an interruption has
4561 * been requested for a thread. The thread to interrupt may not be the current
4562 * thread, so an additional call to mono_thread_interruption_requested() or
4563 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4566 gint32* mono_thread_interruption_request_flag ()
4568 return &thread_interruption_requested;
4572 mono_thread_init_apartment_state (void)
4575 MonoInternalThread* thread = mono_thread_internal_current ();
4577 /* Positive return value indicates success, either
4578 * S_OK if this is first CoInitialize call, or
4579 * S_FALSE if CoInitialize already called, but with same
4580 * threading model. A negative value indicates failure,
4581 * probably due to trying to change the threading model.
4583 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4584 ? COINIT_APARTMENTTHREADED
4585 : COINIT_MULTITHREADED) < 0) {
4586 thread->apartment_state = ThreadApartmentState_Unknown;
4592 mono_thread_cleanup_apartment_state (void)
4595 MonoInternalThread* thread = mono_thread_internal_current ();
4597 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4604 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4606 LOCK_THREAD (thread);
4607 thread->state |= state;
4608 UNLOCK_THREAD (thread);
4612 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4614 LOCK_THREAD (thread);
4615 thread->state &= ~state;
4616 UNLOCK_THREAD (thread);
4620 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4622 gboolean ret = FALSE;
4624 LOCK_THREAD (thread);
4626 if ((thread->state & test) != 0) {
4630 UNLOCK_THREAD (thread);
4635 static gboolean has_tls_get = FALSE;
4638 mono_runtime_set_has_tls_get (gboolean val)
4644 mono_runtime_has_tls_get (void)
4650 self_interrupt_thread (void *_unused)
4652 MonoThreadInfo *info = mono_thread_info_current ();
4653 MonoException *exc = mono_thread_execute_interruption ();
4654 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4655 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. */
4656 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4660 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4664 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4668 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4670 MonoJitInfo **dest = (MonoJitInfo **)data;
4676 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4678 MonoJitInfo *ji = NULL;
4681 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4686 MonoInternalThread *thread;
4687 gboolean install_async_abort;
4688 MonoThreadInfoInterruptToken *interrupt_token;
4691 static SuspendThreadResult
4692 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4694 AbortThreadData *data = (AbortThreadData *)ud;
4695 MonoInternalThread *thread = data->thread;
4696 MonoJitInfo *ji = NULL;
4697 gboolean protected_wrapper;
4698 gboolean running_managed;
4700 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4701 return MonoResumeThread;
4703 /*someone is already interrupting it*/
4704 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4705 return MonoResumeThread;
4707 InterlockedIncrement (&thread_interruption_requested);
4709 ji = mono_thread_info_get_last_managed (info);
4710 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4711 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4713 if (!protected_wrapper && running_managed) {
4714 /*We are in managed code*/
4715 /*Set the thread to call */
4716 if (data->install_async_abort)
4717 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4718 return MonoResumeThread;
4720 if (mono_thread_notify_pending_exc_fn)
4721 /* The JIT will notify the thread about the interruption */
4722 mono_thread_notify_pending_exc_fn (info);
4725 * This will cause waits to be broken.
4726 * It will also prevent the thread from entering a wait, so if the thread returns
4727 * from the wait before it receives the abort signal, it will just spin in the wait
4728 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4731 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4733 return MonoResumeThread;
4738 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4740 AbortThreadData data = { 0 };
4741 data.thread = thread;
4742 data.install_async_abort = install_async_abort;
4745 FIXME this is insanely broken, it doesn't cause interruption to happen
4746 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4748 if (thread == mono_thread_internal_current ()) {
4749 /* Do it synchronously */
4750 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4752 mono_raise_exception (exc);
4754 mono_thread_info_self_interrupt ();
4759 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4760 if (data.interrupt_token)
4761 mono_thread_info_finish_interrupt (data.interrupt_token);
4762 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4766 MonoInternalThread *thread;
4768 MonoThreadInfoInterruptToken *interrupt_token;
4769 } SuspendThreadData;
4771 static SuspendThreadResult
4772 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4774 SuspendThreadData *data = (SuspendThreadData *)ud;
4775 MonoInternalThread *thread = data->thread;
4776 MonoJitInfo *ji = NULL;
4777 gboolean protected_wrapper;
4778 gboolean running_managed;
4780 ji = mono_thread_info_get_last_managed (info);
4781 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4782 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4784 if (running_managed && !protected_wrapper) {
4785 thread->state &= ~ThreadState_SuspendRequested;
4786 thread->state |= ThreadState_Suspended;
4787 return KeepSuspended;
4789 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4790 InterlockedIncrement (&thread_interruption_requested);
4791 if (data->interrupt)
4792 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4794 if (mono_thread_notify_pending_exc_fn && !running_managed)
4795 /* The JIT will notify the thread about the interruption */
4796 mono_thread_notify_pending_exc_fn (info);
4797 return MonoResumeThread;
4802 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4804 if (thread == mono_thread_internal_current ()) {
4805 mono_thread_info_begin_self_suspend ();
4806 //XXX replace this with better named functions
4807 thread->state &= ~ThreadState_SuspendRequested;
4808 thread->state |= ThreadState_Suspended;
4809 UNLOCK_THREAD (thread);
4810 mono_thread_info_end_self_suspend ();
4812 SuspendThreadData data = { 0 };
4813 data.thread = thread;
4814 data.interrupt = interrupt;
4816 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4817 if (data.interrupt_token)
4818 mono_thread_info_finish_interrupt (data.interrupt_token);
4819 UNLOCK_THREAD (thread);
4823 /*This is called with @thread synch_cs held and it must release it*/
4825 self_suspend_internal (MonoInternalThread *thread)
4827 mono_thread_info_begin_self_suspend ();
4828 thread->state &= ~ThreadState_SuspendRequested;
4829 thread->state |= ThreadState_Suspended;
4830 UNLOCK_THREAD (thread);
4831 mono_thread_info_end_self_suspend ();
4836 * mono_thread_is_foreign:
4837 * @thread: the thread to query
4839 * This function allows one to determine if a thread was created by the mono runtime and has
4840 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4842 * Returns: true if @thread was not created by the runtime.
4845 mono_thread_is_foreign (MonoThread *thread)
4847 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4848 return info->runtime_thread == FALSE;
4852 * mono_add_joinable_thread:
4854 * Add TID to the list of joinable threads.
4855 * LOCKING: Acquires the threads lock.
4858 mono_threads_add_joinable_thread (gpointer tid)
4862 * We cannot detach from threads because it causes problems like
4863 * 2fd16f60/r114307. So we collect them and join them when
4864 * we have time (in he finalizer thread).
4866 joinable_threads_lock ();
4867 if (!joinable_threads)
4868 joinable_threads = g_hash_table_new (NULL, NULL);
4869 g_hash_table_insert (joinable_threads, tid, tid);
4870 joinable_thread_count ++;
4871 joinable_threads_unlock ();
4873 mono_gc_finalize_notify ();
4878 * mono_threads_join_threads:
4880 * Join all joinable threads. This is called from the finalizer thread.
4881 * LOCKING: Acquires the threads lock.
4884 mono_threads_join_threads (void)
4887 GHashTableIter iter;
4894 if (!joinable_thread_count)
4898 joinable_threads_lock ();
4900 if (g_hash_table_size (joinable_threads)) {
4901 g_hash_table_iter_init (&iter, joinable_threads);
4902 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4903 thread = (pthread_t)tid;
4904 g_hash_table_remove (joinable_threads, key);
4905 joinable_thread_count --;
4908 joinable_threads_unlock ();
4910 if (thread != pthread_self ())
4911 /* This shouldn't block */
4912 pthread_join (thread, NULL);
4923 * Wait for thread TID to exit.
4924 * LOCKING: Acquires the threads lock.
4927 mono_thread_join (gpointer tid)
4931 gboolean found = FALSE;
4933 joinable_threads_lock ();
4934 if (!joinable_threads)
4935 joinable_threads = g_hash_table_new (NULL, NULL);
4936 if (g_hash_table_lookup (joinable_threads, tid)) {
4937 g_hash_table_remove (joinable_threads, tid);
4938 joinable_thread_count --;
4941 joinable_threads_unlock ();
4944 thread = (pthread_t)tid;
4945 pthread_join (thread, NULL);
4950 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4952 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4953 mono_thread_interruption_checkpoint ();
4956 static inline gboolean
4957 is_appdomainunloaded_exception (MonoClass *klass)
4959 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4961 if (!app_domain_unloaded_exception_klass)
4962 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4963 g_assert (app_domain_unloaded_exception_klass);
4965 return klass == app_domain_unloaded_exception_klass;
4968 static inline gboolean
4969 is_threadabort_exception (MonoClass *klass)
4971 return klass == mono_defaults.threadabortexception_class;
4975 mono_thread_internal_unhandled_exception (MonoObject* exc)
4977 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4978 MonoClass *klass = exc->vtable->klass;
4979 if (is_threadabort_exception (klass)) {
4980 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4981 } else if (!is_appdomainunloaded_exception (klass)) {
4982 mono_unhandled_exception (exc);
4983 if (mono_environment_exitcode_get () == 1)
4990 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4992 mono_threads_get_thread_dump (out_threads, out_stack_traces);