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)
1328 LOCK_THREAD (this_obj);
1330 if (!this_obj->name)
1333 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1335 UNLOCK_THREAD (this_obj);
1341 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1343 LOCK_THREAD (this_obj);
1345 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1346 UNLOCK_THREAD (this_obj);
1348 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1351 if (this_obj->name) {
1352 g_free (this_obj->name);
1353 this_obj->name_len = 0;
1356 this_obj->name = g_new (gunichar2, mono_string_length (name));
1357 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1358 this_obj->name_len = mono_string_length (name);
1361 this_obj->name = NULL;
1364 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1366 UNLOCK_THREAD (this_obj);
1368 if (this_obj->name && this_obj->tid) {
1369 char *tname = mono_string_to_utf8 (name);
1370 mono_profiler_thread_name (this_obj->tid, tname);
1371 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1377 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1379 mono_thread_set_name_internal (this_obj, name, TRUE);
1383 * ves_icall_System_Threading_Thread_GetPriority_internal:
1384 * @param this_obj: The MonoInternalThread on which to operate.
1386 * Gets the priority of the given thread.
1387 * @return: The priority of the given thread.
1390 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1393 MonoInternalThread *internal = this_obj->internal_thread;
1395 LOCK_THREAD (internal);
1396 priority = GetThreadPriority (internal->handle) + 2;
1397 UNLOCK_THREAD (internal);
1402 * ves_icall_System_Threading_Thread_SetPriority_internal:
1403 * @param this_obj: The MonoInternalThread on which to operate.
1404 * @param priority: The priority to set.
1406 * Sets the priority of the given thread.
1409 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1411 MonoInternalThread *internal = this_obj->internal_thread;
1413 LOCK_THREAD (internal);
1414 SetThreadPriority (internal->handle, priority - 2);
1415 UNLOCK_THREAD (internal);
1418 /* If the array is already in the requested domain, we just return it,
1419 otherwise we return a copy in that domain. */
1421 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1428 if (mono_object_domain (arr) == domain)
1431 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1432 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1437 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1439 return byte_array_to_domain (arr, mono_get_root_domain ());
1443 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1445 return byte_array_to_domain (arr, mono_domain_get ());
1449 mono_thread_current (void)
1452 MonoDomain *domain = mono_domain_get ();
1453 MonoInternalThread *internal = mono_thread_internal_current ();
1454 MonoThread **current_thread_ptr;
1456 g_assert (internal);
1457 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1459 if (!*current_thread_ptr) {
1460 g_assert (domain != mono_get_root_domain ());
1461 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1462 mono_error_raise_exception (&error); /* FIXME don't raise here */
1464 return *current_thread_ptr;
1467 /* Return the thread object belonging to INTERNAL in the current domain */
1469 mono_thread_current_for_thread (MonoInternalThread *internal)
1472 MonoDomain *domain = mono_domain_get ();
1473 MonoThread **current_thread_ptr;
1475 g_assert (internal);
1476 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1478 if (!*current_thread_ptr) {
1479 g_assert (domain != mono_get_root_domain ());
1480 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1481 mono_error_raise_exception (&error); /* FIXME don't raise here */
1483 return *current_thread_ptr;
1487 mono_thread_internal_current (void)
1489 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1490 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1495 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1497 MonoInternalThread *thread = this_obj->internal_thread;
1498 HANDLE handle = thread->handle;
1499 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1502 mono_thread_current_check_pending_interrupt ();
1504 LOCK_THREAD (thread);
1506 if ((thread->state & ThreadState_Unstarted) != 0) {
1507 UNLOCK_THREAD (thread);
1509 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1513 UNLOCK_THREAD (thread);
1518 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1520 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1522 MONO_PREPARE_BLOCKING;
1523 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1524 MONO_FINISH_BLOCKING;
1526 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1528 if(ret==WAIT_OBJECT_0) {
1529 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1534 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1540 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1548 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1550 MONO_PREPARE_BLOCKING;
1552 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1554 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1555 MONO_FINISH_BLOCKING;
1557 if (ret != WAIT_IO_COMPLETION)
1560 exc = mono_thread_execute_interruption ();
1562 mono_raise_exception (exc);
1567 /* Re-calculate ms according to the time passed */
1568 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1569 if (diff_ms >= ms) {
1573 wait = ms - diff_ms;
1579 /* FIXME: exitContext isnt documented */
1580 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1586 MonoObject *waitHandle;
1587 MonoInternalThread *thread = mono_thread_internal_current ();
1589 /* Do this WaitSleepJoin check before creating objects */
1590 mono_thread_current_check_pending_interrupt ();
1592 /* We fail in managed if the array has more than 64 elements */
1593 numhandles = (guint32)mono_array_length(mono_handles);
1594 handles = g_new0(HANDLE, numhandles);
1596 for(i = 0; i < numhandles; i++) {
1597 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1598 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1605 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1607 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1609 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1613 if(ret==WAIT_FAILED) {
1614 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1616 } else if(ret==WAIT_TIMEOUT) {
1617 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1624 /* FIXME: exitContext isnt documented */
1625 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1627 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1628 uintptr_t numhandles;
1631 MonoObject *waitHandle;
1632 MonoInternalThread *thread = mono_thread_internal_current ();
1634 /* Do this WaitSleepJoin check before creating objects */
1635 mono_thread_current_check_pending_interrupt ();
1637 numhandles = mono_array_length(mono_handles);
1638 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1641 for(i = 0; i < numhandles; i++) {
1642 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1643 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1650 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1652 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1654 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1656 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1659 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1661 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1662 return ret - WAIT_OBJECT_0;
1664 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1665 return ret - WAIT_ABANDONED_0;
1672 /* FIXME: exitContext isnt documented */
1673 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1676 MonoInternalThread *thread = mono_thread_internal_current ();
1678 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1684 mono_thread_current_check_pending_interrupt ();
1686 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1688 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1690 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1692 if(ret==WAIT_FAILED) {
1693 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1695 } else if(ret==WAIT_TIMEOUT) {
1696 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1704 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1707 MonoInternalThread *thread = mono_thread_internal_current ();
1712 mono_thread_current_check_pending_interrupt ();
1714 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1716 MONO_PREPARE_BLOCKING;
1717 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1718 MONO_FINISH_BLOCKING;
1720 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1722 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1725 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1732 mutex = CreateMutex (NULL, owned, NULL);
1734 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1736 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1744 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1745 return(ReleaseMutex (handle));
1748 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1754 *error = ERROR_SUCCESS;
1756 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1758 *error = GetLastError ();
1765 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1772 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1774 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1775 mono_string_chars (name));
1777 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1785 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1789 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1794 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1798 *error = ERROR_SUCCESS;
1800 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1802 *error = GetLastError ();
1808 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1815 event = CreateEvent (NULL, manual, initial, NULL);
1817 event = CreateEvent (NULL, manual, initial,
1818 mono_string_chars (name));
1820 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1828 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1829 return (SetEvent(handle));
1832 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1833 return (ResetEvent(handle));
1837 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1838 CloseHandle (handle);
1841 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1847 *error = ERROR_SUCCESS;
1849 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1851 *error = GetLastError ();
1857 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1859 return InterlockedIncrement (location);
1862 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1864 #if SIZEOF_VOID_P == 4
1865 if (G_UNLIKELY ((size_t)location & 0x7)) {
1867 mono_interlocked_lock ();
1870 mono_interlocked_unlock ();
1874 return InterlockedIncrement64 (location);
1877 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1879 return InterlockedDecrement(location);
1882 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1884 #if SIZEOF_VOID_P == 4
1885 if (G_UNLIKELY ((size_t)location & 0x7)) {
1887 mono_interlocked_lock ();
1890 mono_interlocked_unlock ();
1894 return InterlockedDecrement64 (location);
1897 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1899 return InterlockedExchange(location, value);
1902 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1905 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1906 mono_gc_wbarrier_generic_nostore (location);
1910 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1912 return InterlockedExchangePointer(location, value);
1915 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1917 IntFloatUnion val, ret;
1920 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1926 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1928 #if SIZEOF_VOID_P == 4
1929 if (G_UNLIKELY ((size_t)location & 0x7)) {
1931 mono_interlocked_lock ();
1934 mono_interlocked_unlock ();
1938 return InterlockedExchange64 (location, value);
1942 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1944 LongDoubleUnion val, ret;
1947 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1952 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1954 return InterlockedCompareExchange(location, value, comparand);
1957 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1959 gint32 r = InterlockedCompareExchange(location, value, comparand);
1960 *success = r == comparand;
1964 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1967 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1968 mono_gc_wbarrier_generic_nostore (location);
1972 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1974 return InterlockedCompareExchangePointer(location, value, comparand);
1977 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1979 IntFloatUnion val, ret, cmp;
1982 cmp.fval = comparand;
1983 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1989 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1991 #if SIZEOF_VOID_P == 8
1992 LongDoubleUnion val, comp, ret;
1995 comp.fval = comparand;
1996 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2002 mono_interlocked_lock ();
2004 if (old == comparand)
2006 mono_interlocked_unlock ();
2013 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2015 #if SIZEOF_VOID_P == 4
2016 if (G_UNLIKELY ((size_t)location & 0x7)) {
2018 mono_interlocked_lock ();
2020 if (old == comparand)
2022 mono_interlocked_unlock ();
2026 return InterlockedCompareExchange64 (location, value, comparand);
2030 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2033 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2034 mono_gc_wbarrier_generic_nostore (location);
2039 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2042 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2043 mono_gc_wbarrier_generic_nostore (location);
2048 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2050 return InterlockedAdd (location, value);
2054 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2056 #if SIZEOF_VOID_P == 4
2057 if (G_UNLIKELY ((size_t)location & 0x7)) {
2059 mono_interlocked_lock ();
2062 mono_interlocked_unlock ();
2066 return InterlockedAdd64 (location, value);
2070 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2072 #if SIZEOF_VOID_P == 4
2073 if (G_UNLIKELY ((size_t)location & 0x7)) {
2075 mono_interlocked_lock ();
2077 mono_interlocked_unlock ();
2081 return InterlockedRead64 (location);
2085 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2087 mono_memory_barrier ();
2091 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2093 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2095 if (state & ThreadState_Background) {
2096 /* If the thread changes the background mode, the main thread has to
2097 * be notified, since it has to rebuild the list of threads to
2100 SetEvent (background_change_event);
2105 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2107 mono_thread_set_state (this_obj, (MonoThreadState)state);
2109 if (state & ThreadState_Background) {
2110 /* If the thread changes the background mode, the main thread has to
2111 * be notified, since it has to rebuild the list of threads to
2114 SetEvent (background_change_event);
2119 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2123 LOCK_THREAD (this_obj);
2125 state = this_obj->state;
2127 UNLOCK_THREAD (this_obj);
2132 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2134 MonoInternalThread *current;
2136 MonoInternalThread *thread = this_obj->internal_thread;
2138 LOCK_THREAD (thread);
2140 current = mono_thread_internal_current ();
2142 thread->thread_interrupt_requested = TRUE;
2143 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2145 UNLOCK_THREAD (thread);
2148 abort_thread_internal (thread, TRUE, FALSE);
2152 void mono_thread_current_check_pending_interrupt ()
2154 MonoInternalThread *thread = mono_thread_internal_current ();
2155 gboolean throw_ = FALSE;
2157 LOCK_THREAD (thread);
2159 if (thread->thread_interrupt_requested) {
2161 thread->thread_interrupt_requested = FALSE;
2164 UNLOCK_THREAD (thread);
2167 mono_raise_exception (mono_get_exception_thread_interrupted ());
2172 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2174 LOCK_THREAD (thread);
2176 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2177 (thread->state & ThreadState_StopRequested) != 0 ||
2178 (thread->state & ThreadState_Stopped) != 0)
2180 UNLOCK_THREAD (thread);
2184 if ((thread->state & ThreadState_Unstarted) != 0) {
2185 thread->state |= ThreadState_Aborted;
2186 UNLOCK_THREAD (thread);
2190 thread->state |= ThreadState_AbortRequested;
2191 if (thread->abort_state_handle)
2192 mono_gchandle_free (thread->abort_state_handle);
2194 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2195 g_assert (thread->abort_state_handle);
2197 thread->abort_state_handle = 0;
2199 thread->abort_exc = NULL;
2201 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));
2203 /* During shutdown, we can't wait for other threads */
2205 /* Make sure the thread is awake */
2206 mono_thread_resume (thread);
2208 UNLOCK_THREAD (thread);
2210 abort_thread_internal (thread, TRUE, TRUE);
2214 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2216 MonoInternalThread *thread = mono_thread_internal_current ();
2217 gboolean was_aborting;
2219 LOCK_THREAD (thread);
2220 was_aborting = thread->state & ThreadState_AbortRequested;
2221 thread->state &= ~ThreadState_AbortRequested;
2222 UNLOCK_THREAD (thread);
2224 if (!was_aborting) {
2225 const char *msg = "Unable to reset abort because no abort was requested";
2226 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2229 thread->abort_exc = NULL;
2230 if (thread->abort_state_handle) {
2231 mono_gchandle_free (thread->abort_state_handle);
2232 /* This is actually not necessary - the handle
2233 only counts if the exception is set */
2234 thread->abort_state_handle = 0;
2239 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2241 LOCK_THREAD (thread);
2243 thread->state &= ~ThreadState_AbortRequested;
2245 if (thread->abort_exc) {
2246 thread->abort_exc = NULL;
2247 if (thread->abort_state_handle) {
2248 mono_gchandle_free (thread->abort_state_handle);
2249 /* This is actually not necessary - the handle
2250 only counts if the exception is set */
2251 thread->abort_state_handle = 0;
2255 UNLOCK_THREAD (thread);
2259 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2261 MonoInternalThread *thread = this_obj->internal_thread;
2262 MonoObject *state, *deserialized = NULL, *exc;
2265 if (!thread->abort_state_handle)
2268 state = mono_gchandle_get_target (thread->abort_state_handle);
2271 domain = mono_domain_get ();
2272 if (mono_object_domain (state) == domain)
2275 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2277 if (!deserialized) {
2278 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2280 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2281 mono_set_pending_exception (invalid_op_exc);
2285 return deserialized;
2289 mono_thread_suspend (MonoInternalThread *thread)
2291 LOCK_THREAD (thread);
2293 if ((thread->state & ThreadState_Unstarted) != 0 ||
2294 (thread->state & ThreadState_Aborted) != 0 ||
2295 (thread->state & ThreadState_Stopped) != 0)
2297 UNLOCK_THREAD (thread);
2301 if ((thread->state & ThreadState_Suspended) != 0 ||
2302 (thread->state & ThreadState_SuspendRequested) != 0 ||
2303 (thread->state & ThreadState_StopRequested) != 0)
2305 UNLOCK_THREAD (thread);
2309 thread->state |= ThreadState_SuspendRequested;
2310 suspend_thread_internal (thread, FALSE);
2315 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2317 if (!mono_thread_suspend (this_obj->internal_thread)) {
2318 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2323 /* LOCKING: LOCK_THREAD(thread) must be held */
2325 mono_thread_resume (MonoInternalThread *thread)
2327 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2328 thread->state &= ~ThreadState_SuspendRequested;
2332 if ((thread->state & ThreadState_Suspended) == 0 ||
2333 (thread->state & ThreadState_Unstarted) != 0 ||
2334 (thread->state & ThreadState_Aborted) != 0 ||
2335 (thread->state & ThreadState_Stopped) != 0)
2340 UNLOCK_THREAD (thread);
2342 /* Awake the thread */
2343 if (!mono_thread_info_resume (thread_get_tid (thread)))
2346 LOCK_THREAD (thread);
2348 thread->state &= ~ThreadState_Suspended;
2354 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2356 if (!thread->internal_thread) {
2357 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2359 LOCK_THREAD (thread->internal_thread);
2360 if (!mono_thread_resume (thread->internal_thread))
2361 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2362 UNLOCK_THREAD (thread->internal_thread);
2367 mono_threads_is_critical_method (MonoMethod *method)
2369 switch (method->wrapper_type) {
2370 case MONO_WRAPPER_RUNTIME_INVOKE:
2371 case MONO_WRAPPER_XDOMAIN_INVOKE:
2372 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2379 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2384 if (mono_threads_is_critical_method (m)) {
2385 *((gboolean*)data) = TRUE;
2392 is_running_protected_wrapper (void)
2394 gboolean found = FALSE;
2395 mono_stack_walk (find_wrapper, &found);
2399 void mono_thread_internal_stop (MonoInternalThread *thread)
2401 LOCK_THREAD (thread);
2403 if ((thread->state & ThreadState_StopRequested) != 0 ||
2404 (thread->state & ThreadState_Stopped) != 0)
2406 UNLOCK_THREAD (thread);
2410 /* Make sure the thread is awake */
2411 mono_thread_resume (thread);
2413 thread->state |= ThreadState_StopRequested;
2414 thread->state &= ~ThreadState_AbortRequested;
2416 UNLOCK_THREAD (thread);
2418 abort_thread_internal (thread, TRUE, TRUE);
2421 void mono_thread_stop (MonoThread *thread)
2423 mono_thread_internal_stop (thread->internal_thread);
2427 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2429 gint8 tmp = *(volatile gint8 *)ptr;
2430 mono_memory_barrier ();
2435 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2437 gint16 tmp = *(volatile gint16 *)ptr;
2438 mono_memory_barrier ();
2443 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2445 gint32 tmp = *(volatile gint32 *)ptr;
2446 mono_memory_barrier ();
2451 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2453 gint64 tmp = *(volatile gint64 *)ptr;
2454 mono_memory_barrier ();
2459 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2461 volatile void *tmp = *(volatile void **)ptr;
2462 mono_memory_barrier ();
2463 return (void *) tmp;
2467 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2469 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2470 mono_memory_barrier ();
2471 return (MonoObject *) tmp;
2475 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2477 double tmp = *(volatile double *)ptr;
2478 mono_memory_barrier ();
2483 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2485 float tmp = *(volatile float *)ptr;
2486 mono_memory_barrier ();
2491 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2493 return InterlockedRead8 ((volatile gint8 *)ptr);
2497 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2499 return InterlockedRead16 ((volatile gint16 *)ptr);
2503 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2505 return InterlockedRead ((volatile gint32 *)ptr);
2509 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2511 #if SIZEOF_VOID_P == 4
2512 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2514 mono_interlocked_lock ();
2515 val = *(gint64*)ptr;
2516 mono_interlocked_unlock ();
2520 return InterlockedRead64 ((volatile gint64 *)ptr);
2524 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2526 return InterlockedReadPointer ((volatile gpointer *)ptr);
2530 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2534 #if SIZEOF_VOID_P == 4
2535 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2537 mono_interlocked_lock ();
2538 val = *(double*)ptr;
2539 mono_interlocked_unlock ();
2544 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2550 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2554 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2560 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2562 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2566 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2568 mono_memory_barrier ();
2569 *(volatile gint8 *)ptr = value;
2573 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2575 mono_memory_barrier ();
2576 *(volatile gint16 *)ptr = value;
2580 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2582 mono_memory_barrier ();
2583 *(volatile gint32 *)ptr = value;
2587 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2589 mono_memory_barrier ();
2590 *(volatile gint64 *)ptr = value;
2594 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2596 mono_memory_barrier ();
2597 *(volatile void **)ptr = value;
2601 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2603 mono_memory_barrier ();
2604 mono_gc_wbarrier_generic_store (ptr, value);
2608 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2610 mono_memory_barrier ();
2611 *(volatile double *)ptr = value;
2615 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2617 mono_memory_barrier ();
2618 *(volatile float *)ptr = value;
2622 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2624 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2628 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2630 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2634 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2636 InterlockedWrite ((volatile gint32 *)ptr, value);
2640 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2642 #if SIZEOF_VOID_P == 4
2643 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2644 mono_interlocked_lock ();
2645 *(gint64*)ptr = value;
2646 mono_interlocked_unlock ();
2651 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2655 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2657 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2661 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2665 #if SIZEOF_VOID_P == 4
2666 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2667 mono_interlocked_lock ();
2668 *(double*)ptr = value;
2669 mono_interlocked_unlock ();
2676 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2680 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2686 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2690 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2692 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2696 free_context (void *user_data)
2698 ContextStaticData *data = user_data;
2700 mono_threads_lock ();
2703 * There is no guarantee that, by the point this reference queue callback
2704 * has been invoked, the GC handle associated with the object will fail to
2705 * resolve as one might expect. So if we don't free and remove the GC
2706 * handle here, free_context_static_data_helper () could end up resolving
2707 * a GC handle to an actually-dead context which would contain a pointer
2708 * to an already-freed static data segment, resulting in a crash when
2711 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2713 mono_threads_unlock ();
2715 mono_gchandle_free (data->gc_handle);
2716 mono_free_static_data (data->static_data);
2721 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2723 mono_threads_lock ();
2725 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2728 contexts = g_hash_table_new (NULL, NULL);
2731 context_queue = mono_gc_reference_queue_new (free_context);
2733 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2734 g_hash_table_insert (contexts, gch, gch);
2737 * We use this intermediate structure to contain a duplicate pointer to
2738 * the static data because we can't rely on being able to resolve the GC
2739 * handle in the reference queue callback.
2741 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2742 data->gc_handle = GPOINTER_TO_UINT (gch);
2745 context_adjust_static_data (ctx);
2746 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2748 mono_threads_unlock ();
2750 mono_profiler_context_loaded (ctx);
2754 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2757 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2758 * cleanup in exceptional circumstances, we don't actually do any
2759 * cleanup work here. We instead do this via a reference queue.
2762 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2764 mono_profiler_context_unloaded (ctx);
2768 mono_thread_init_tls (void)
2770 MONO_FAST_TLS_INIT (tls_current_object);
2771 mono_native_tls_alloc (¤t_object_key, NULL);
2774 void mono_thread_init (MonoThreadStartCB start_cb,
2775 MonoThreadAttachCB attach_cb)
2777 mono_coop_mutex_init_recursive (&threads_mutex);
2779 mono_os_mutex_init_recursive(&interlocked_mutex);
2780 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2782 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2783 g_assert(background_change_event != NULL);
2785 mono_init_static_data_info (&thread_static_info);
2786 mono_init_static_data_info (&context_static_info);
2788 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2790 mono_thread_start_cb = start_cb;
2791 mono_thread_attach_cb = attach_cb;
2793 /* Get a pseudo handle to the current process. This is just a
2794 * kludge so that wapi can build a process handle if needed.
2795 * As a pseudo handle is returned, we don't need to clean
2798 GetCurrentProcess ();
2801 void mono_thread_cleanup (void)
2803 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2804 MonoThreadInfo *info;
2806 /* The main thread must abandon any held mutexes (particularly
2807 * important for named mutexes as they are shared across
2808 * processes, see bug 74680.) This will happen when the
2809 * thread exits, but if it's not running in a subthread it
2810 * won't exit in time.
2812 info = mono_thread_info_current ();
2813 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2817 /* This stuff needs more testing, it seems one of these
2818 * critical sections can be locked when mono_thread_cleanup is
2821 mono_coop_mutex_destroy (&threads_mutex);
2822 mono_os_mutex_destroy (&interlocked_mutex);
2823 mono_os_mutex_destroy (&delayed_free_table_mutex);
2824 mono_os_mutex_destroy (&small_id_mutex);
2825 CloseHandle (background_change_event);
2828 mono_native_tls_free (current_object_key);
2832 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2834 mono_thread_cleanup_fn = func;
2838 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2840 thread->internal_thread->manage_callback = func;
2843 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2845 mono_thread_notify_pending_exc_fn = func;
2849 static void print_tids (gpointer key, gpointer value, gpointer user)
2851 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2852 * sizeof(uint) and a cast to uint would overflow
2854 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2855 * print this as a pointer.
2857 g_message ("Waiting for: %p", key);
2862 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2863 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2867 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2871 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2873 MONO_PREPARE_BLOCKING;
2874 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2875 MONO_FINISH_BLOCKING;
2877 if(ret==WAIT_FAILED) {
2878 /* See the comment in build_wait_tids() */
2879 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2883 for(i=0; i<wait->num; i++)
2884 CloseHandle (wait->handles[i]);
2886 if (ret == WAIT_TIMEOUT)
2889 for(i=0; i<wait->num; i++) {
2890 gsize tid = wait->threads[i]->tid;
2893 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2894 * it can still run io-layer etc. code. So wait for it to really exit.
2895 * FIXME: This won't join threads which are not in the joinable_hash yet.
2897 mono_thread_join ((gpointer)tid);
2899 mono_threads_lock ();
2900 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2901 /* This thread must have been killed, because
2902 * it hasn't cleaned itself up. (It's just
2903 * possible that the thread exited before the
2904 * parent thread had a chance to store the
2905 * handle, and now there is another pointer to
2906 * the already-exited thread stored. In this
2907 * case, we'll just get two
2908 * mono_profiler_thread_end() calls for the
2912 mono_threads_unlock ();
2913 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2914 thread_cleanup (wait->threads[i]);
2916 mono_threads_unlock ();
2921 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2923 guint32 i, ret, count;
2925 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2927 /* Add the thread state change event, so it wakes up if a thread changes
2928 * to background mode.
2931 if (count < MAXIMUM_WAIT_OBJECTS) {
2932 wait->handles [count] = background_change_event;
2936 MONO_PREPARE_BLOCKING;
2937 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2938 MONO_FINISH_BLOCKING;
2940 if(ret==WAIT_FAILED) {
2941 /* See the comment in build_wait_tids() */
2942 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2946 for(i=0; i<wait->num; i++)
2947 CloseHandle (wait->handles[i]);
2949 if (ret == WAIT_TIMEOUT)
2952 if (ret < wait->num) {
2953 gsize tid = wait->threads[ret]->tid;
2954 mono_threads_lock ();
2955 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2956 /* See comment in wait_for_tids about thread cleanup */
2957 mono_threads_unlock ();
2958 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2959 thread_cleanup (wait->threads [ret]);
2961 mono_threads_unlock ();
2965 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2967 struct wait_data *wait=(struct wait_data *)user;
2969 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2971 MonoInternalThread *thread=(MonoInternalThread *)value;
2973 /* Ignore background threads, we abort them later */
2974 /* Do not lock here since it is not needed and the caller holds threads_lock */
2975 if (thread->state & ThreadState_Background) {
2976 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2977 return; /* just leave, ignore */
2980 if (mono_gc_is_finalizer_internal_thread (thread)) {
2981 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2985 if (thread == mono_thread_internal_current ()) {
2986 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2990 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2991 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2995 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2996 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3000 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3001 if (handle == NULL) {
3002 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3006 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3007 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3008 wait->handles[wait->num]=handle;
3009 wait->threads[wait->num]=thread;
3012 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3014 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3019 /* Just ignore the rest, we can't do anything with
3026 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3028 struct wait_data *wait=(struct wait_data *)user;
3029 MonoNativeThreadId self = mono_native_thread_id_get ();
3030 MonoInternalThread *thread = (MonoInternalThread *)value;
3033 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3036 /* The finalizer thread is not a background thread */
3037 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3038 && (thread->state & ThreadState_Background) != 0
3039 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3041 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3045 /* printf ("A: %d\n", wait->num); */
3046 wait->handles[wait->num]=thread->handle;
3047 wait->threads[wait->num]=thread;
3050 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3051 mono_thread_internal_stop (thread);
3055 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3056 && !mono_gc_is_finalizer_internal_thread (thread);
3060 * mono_threads_set_shutting_down:
3062 * Is called by a thread that wants to shut down Mono. If the runtime is already
3063 * shutting down, the calling thread is suspended/stopped, and this function never
3067 mono_threads_set_shutting_down (void)
3069 MonoInternalThread *current_thread = mono_thread_internal_current ();
3071 mono_threads_lock ();
3073 if (shutting_down) {
3074 mono_threads_unlock ();
3076 /* Make sure we're properly suspended/stopped */
3078 LOCK_THREAD (current_thread);
3080 if ((current_thread->state & ThreadState_SuspendRequested) ||
3081 (current_thread->state & ThreadState_AbortRequested) ||
3082 (current_thread->state & ThreadState_StopRequested)) {
3083 UNLOCK_THREAD (current_thread);
3084 mono_thread_execute_interruption ();
3086 current_thread->state |= ThreadState_Stopped;
3087 UNLOCK_THREAD (current_thread);
3090 /*since we're killing the thread, unset the current domain.*/
3091 mono_domain_unset ();
3093 /* Wake up other threads potentially waiting for us */
3094 mono_thread_info_exit ();
3096 shutting_down = TRUE;
3098 /* Not really a background state change, but this will
3099 * interrupt the main thread if it is waiting for all
3100 * the other threads.
3102 SetEvent (background_change_event);
3104 mono_threads_unlock ();
3108 void mono_thread_manage (void)
3110 struct wait_data wait_data;
3111 struct wait_data *wait = &wait_data;
3113 memset (wait, 0, sizeof (struct wait_data));
3114 /* join each thread that's still running */
3115 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3117 mono_threads_lock ();
3119 THREAD_DEBUG (g_message("%s: No threads", __func__));
3120 mono_threads_unlock ();
3123 mono_threads_unlock ();
3126 mono_threads_lock ();
3127 if (shutting_down) {
3128 /* somebody else is shutting down */
3129 mono_threads_unlock ();
3132 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3133 mono_g_hash_table_foreach (threads, print_tids, NULL));
3135 ResetEvent (background_change_event);
3137 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3138 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3139 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3140 mono_threads_unlock ();
3142 /* Something to wait for */
3143 wait_for_tids_or_state_change (wait, INFINITE);
3145 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3146 } while(wait->num>0);
3148 /* Mono is shutting down, so just wait for the end */
3149 if (!mono_runtime_try_shutdown ()) {
3150 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3151 mono_thread_suspend (mono_thread_internal_current ());
3152 mono_thread_execute_interruption ();
3156 * Remove everything but the finalizer thread and self.
3157 * Also abort all the background threads
3160 mono_threads_lock ();
3163 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3164 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3165 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3167 mono_threads_unlock ();
3169 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3171 /* Something to wait for */
3172 wait_for_tids (wait, INFINITE);
3174 } while (wait->num > 0);
3177 * give the subthreads a chance to really quit (this is mainly needed
3178 * to get correct user and system times from getrusage/wait/time(1)).
3179 * This could be removed if we avoid pthread_detach() and use pthread_join().
3181 mono_thread_info_yield ();
3185 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3187 MonoInternalThread *thread = (MonoInternalThread*)value;
3188 struct wait_data *wait = (struct wait_data*)user_data;
3192 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3194 * This needs no locking.
3196 if ((thread->state & ThreadState_Suspended) != 0 ||
3197 (thread->state & ThreadState_Stopped) != 0)
3200 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3201 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3205 wait->handles [wait->num] = handle;
3206 wait->threads [wait->num] = thread;
3212 * mono_thread_suspend_all_other_threads:
3214 * Suspend all managed threads except the finalizer thread and this thread. It is
3215 * not possible to resume them later.
3217 void mono_thread_suspend_all_other_threads (void)
3219 struct wait_data wait_data;
3220 struct wait_data *wait = &wait_data;
3222 MonoNativeThreadId self = mono_native_thread_id_get ();
3223 guint32 eventidx = 0;
3224 gboolean starting, finished;
3226 memset (wait, 0, sizeof (struct wait_data));
3228 * The other threads could be in an arbitrary state at this point, i.e.
3229 * they could be starting up, shutting down etc. This means that there could be
3230 * threads which are not even in the threads hash table yet.
3234 * First we set a barrier which will be checked by all threads before they
3235 * are added to the threads hash table, and they will exit if the flag is set.
3236 * This ensures that no threads could be added to the hash later.
3237 * We will use shutting_down as the barrier for now.
3239 g_assert (shutting_down);
3242 * We make multiple calls to WaitForMultipleObjects since:
3243 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3244 * - some threads could exit without becoming suspended
3249 * Make a copy of the hashtable since we can't do anything with
3250 * threads while threads_mutex is held.
3253 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3254 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3255 mono_threads_lock ();
3256 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3257 mono_threads_unlock ();
3260 /* Get the suspended events that we'll be waiting for */
3261 for (i = 0; i < wait->num; ++i) {
3262 MonoInternalThread *thread = wait->threads [i];
3264 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3265 || mono_gc_is_finalizer_internal_thread (thread)
3266 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3268 //CloseHandle (wait->handles [i]);
3269 wait->threads [i] = NULL; /* ignore this thread in next loop */
3273 LOCK_THREAD (thread);
3275 if ((thread->state & ThreadState_Suspended) != 0 ||
3276 (thread->state & ThreadState_StopRequested) != 0 ||
3277 (thread->state & ThreadState_Stopped) != 0) {
3278 UNLOCK_THREAD (thread);
3279 CloseHandle (wait->handles [i]);
3280 wait->threads [i] = NULL; /* ignore this thread in next loop */
3286 /* Convert abort requests into suspend requests */
3287 if ((thread->state & ThreadState_AbortRequested) != 0)
3288 thread->state &= ~ThreadState_AbortRequested;
3290 thread->state |= ThreadState_SuspendRequested;
3291 /* Signal the thread to suspend */
3292 suspend_thread_internal (thread, TRUE);
3294 if (eventidx <= 0) {
3296 * If there are threads which are starting up, we wait until they
3297 * are suspended when they try to register in the threads hash.
3298 * This is guaranteed to finish, since the threads which can create new
3299 * threads get suspended after a while.
3300 * FIXME: The finalizer thread can still create new threads.
3302 mono_threads_lock ();
3303 if (threads_starting_up)
3304 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3307 mono_threads_unlock ();
3309 mono_thread_info_sleep (100, NULL);
3317 MonoInternalThread *thread;
3318 MonoStackFrameInfo *frames;
3319 int nframes, max_frames;
3320 int nthreads, max_threads;
3321 MonoInternalThread **threads;
3322 } ThreadDumpUserData;
3324 static gboolean thread_dump_requested;
3326 /* This needs to be async safe */
3328 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3330 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3332 if (ud->nframes < ud->max_frames) {
3333 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3340 /* This needs to be async safe */
3341 static SuspendThreadResult
3342 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3344 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3345 MonoInternalThread *thread = user_data->thread;
3348 /* This no longer works with remote unwinding */
3350 wapi_desc = wapi_current_thread_desc ();
3351 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3356 if (thread == mono_thread_internal_current ())
3357 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3359 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3361 return MonoResumeThread;
3365 int nthreads, max_threads;
3366 MonoInternalThread **threads;
3367 } CollectThreadsUserData;
3370 collect_thread (gpointer key, gpointer value, gpointer user)
3372 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3373 MonoInternalThread *thread = (MonoInternalThread *)value;
3375 if (ud->nthreads < ud->max_threads)
3376 ud->threads [ud->nthreads ++] = thread;
3380 * Collect running threads into the THREADS array.
3381 * THREADS should be an array allocated on the stack.
3384 collect_threads (MonoInternalThread **thread_array, int max_threads)
3386 CollectThreadsUserData ud;
3388 memset (&ud, 0, sizeof (ud));
3389 /* This array contains refs, but its on the stack, so its ok */
3390 ud.threads = thread_array;
3391 ud.max_threads = max_threads;
3393 mono_threads_lock ();
3394 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3395 mono_threads_unlock ();
3401 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3403 GString* text = g_string_new (0);
3405 GError *error = NULL;
3408 ud->thread = thread;
3411 /* Collect frames for the thread */
3412 if (thread == mono_thread_internal_current ()) {
3413 get_thread_dump (mono_thread_info_current (), ud);
3415 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3419 * Do all the non async-safe work outside of get_thread_dump.
3422 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3424 g_string_append_printf (text, "\n\"%s\"", name);
3427 else if (thread->threadpool_thread) {
3428 g_string_append (text, "\n\"<threadpool thread>\"");
3430 g_string_append (text, "\n\"<unnamed thread>\"");
3433 for (i = 0; i < ud->nframes; ++i) {
3434 MonoStackFrameInfo *frame = &ud->frames [i];
3435 MonoMethod *method = NULL;
3437 if (frame->type == FRAME_TYPE_MANAGED)
3438 method = mono_jit_info_get_method (frame->ji);
3441 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3442 g_string_append_printf (text, " %s\n", location);
3445 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3449 fprintf (stdout, "%s", text->str);
3451 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3452 OutputDebugStringA(text->str);
3455 g_string_free (text, TRUE);
3460 mono_threads_perform_thread_dump (void)
3462 ThreadDumpUserData ud;
3463 MonoInternalThread *thread_array [128];
3464 int tindex, nthreads;
3466 if (!thread_dump_requested)
3469 printf ("Full thread dump:\n");
3471 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3472 nthreads = collect_threads (thread_array, 128);
3474 memset (&ud, 0, sizeof (ud));
3475 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3476 ud.max_frames = 256;
3478 for (tindex = 0; tindex < nthreads; ++tindex)
3479 dump_thread (thread_array [tindex], &ud);
3483 thread_dump_requested = FALSE;
3486 /* Obtain the thread dump of all threads */
3488 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3492 ThreadDumpUserData ud;
3493 MonoInternalThread *thread_array [128];
3494 MonoDomain *domain = mono_domain_get ();
3495 MonoDebugSourceLocation *location;
3496 int tindex, nthreads;
3498 mono_error_init (&error);
3500 *out_threads = NULL;
3501 *out_stack_frames = NULL;
3503 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3504 nthreads = collect_threads (thread_array, 128);
3506 memset (&ud, 0, sizeof (ud));
3507 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3508 ud.max_frames = 256;
3510 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3511 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3513 for (tindex = 0; tindex < nthreads; ++tindex) {
3514 MonoInternalThread *thread = thread_array [tindex];
3515 MonoArray *thread_frames;
3521 /* Collect frames for the thread */
3522 if (thread == mono_thread_internal_current ()) {
3523 get_thread_dump (mono_thread_info_current (), &ud);
3525 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3528 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3530 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3531 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3533 for (i = 0; i < ud.nframes; ++i) {
3534 MonoStackFrameInfo *frame = &ud.frames [i];
3535 MonoMethod *method = NULL;
3536 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3537 if (!mono_error_ok (&error))
3540 sf->native_offset = frame->native_offset;
3542 if (frame->type == FRAME_TYPE_MANAGED)
3543 method = mono_jit_info_get_method (frame->ji);
3546 sf->method_address = (gsize) frame->ji->code_start;
3548 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3549 mono_error_raise_exception (&error); /* FIXME don't raise here */
3550 MONO_OBJECT_SETREF (sf, method, rm);
3552 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3554 sf->il_offset = location->il_offset;
3556 if (location && location->source_file) {
3557 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3558 sf->line = location->row;
3559 sf->column = location->column;
3561 mono_debug_free_source_location (location);
3566 mono_array_setref (thread_frames, i, sf);
3572 mono_error_raise_exception (&error); /* FIXME don't raise here */
3576 * mono_threads_request_thread_dump:
3578 * Ask all threads except the current to print their stacktrace to stdout.
3581 mono_threads_request_thread_dump (void)
3583 /*The new thread dump code runs out of the finalizer thread. */
3584 thread_dump_requested = TRUE;
3585 mono_gc_finalize_notify ();
3590 gint allocated; /* +1 so that refs [allocated] == NULL */
3594 typedef struct ref_stack RefStack;
3597 ref_stack_new (gint initial_size)
3601 initial_size = MAX (initial_size, 16) + 1;
3602 rs = g_new0 (RefStack, 1);
3603 rs->refs = g_new0 (gpointer, initial_size);
3604 rs->allocated = initial_size;
3609 ref_stack_destroy (gpointer ptr)
3611 RefStack *rs = (RefStack *)ptr;
3620 ref_stack_push (RefStack *rs, gpointer ptr)
3622 g_assert (rs != NULL);
3624 if (rs->bottom >= rs->allocated) {
3625 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3626 rs->allocated <<= 1;
3627 rs->refs [rs->allocated] = NULL;
3629 rs->refs [rs->bottom++] = ptr;
3633 ref_stack_pop (RefStack *rs)
3635 if (rs == NULL || rs->bottom == 0)
3639 rs->refs [rs->bottom] = NULL;
3643 ref_stack_find (RefStack *rs, gpointer ptr)
3650 for (refs = rs->refs; refs && *refs; refs++) {
3658 * mono_thread_push_appdomain_ref:
3660 * Register that the current thread may have references to objects in domain
3661 * @domain on its stack. Each call to this function should be paired with a
3662 * call to pop_appdomain_ref.
3665 mono_thread_push_appdomain_ref (MonoDomain *domain)
3667 MonoInternalThread *thread = mono_thread_internal_current ();
3670 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3671 SPIN_LOCK (thread->lock_thread_id);
3672 if (thread->appdomain_refs == NULL)
3673 thread->appdomain_refs = ref_stack_new (16);
3674 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3675 SPIN_UNLOCK (thread->lock_thread_id);
3680 mono_thread_pop_appdomain_ref (void)
3682 MonoInternalThread *thread = mono_thread_internal_current ();
3685 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3686 SPIN_LOCK (thread->lock_thread_id);
3687 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3688 SPIN_UNLOCK (thread->lock_thread_id);
3693 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3696 SPIN_LOCK (thread->lock_thread_id);
3697 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3698 SPIN_UNLOCK (thread->lock_thread_id);
3703 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3705 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3708 typedef struct abort_appdomain_data {
3709 struct wait_data wait;
3711 } abort_appdomain_data;
3714 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3716 MonoInternalThread *thread = (MonoInternalThread*)value;
3717 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3718 MonoDomain *domain = data->domain;
3720 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3721 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3723 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3724 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3727 data->wait.handles [data->wait.num] = handle;
3728 data->wait.threads [data->wait.num] = thread;
3731 /* Just ignore the rest, we can't do anything with
3739 * mono_threads_abort_appdomain_threads:
3741 * Abort threads which has references to the given appdomain.
3744 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3746 #ifdef __native_client__
3750 abort_appdomain_data user_data;
3752 int orig_timeout = timeout;
3755 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3757 start_time = mono_msec_ticks ();
3759 mono_threads_lock ();
3761 user_data.domain = domain;
3762 user_data.wait.num = 0;
3763 /* This shouldn't take any locks */
3764 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3765 mono_threads_unlock ();
3767 if (user_data.wait.num > 0) {
3768 /* Abort the threads outside the threads lock */
3769 for (i = 0; i < user_data.wait.num; ++i)
3770 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3773 * We should wait for the threads either to abort, or to leave the
3774 * domain. We can't do the latter, so we wait with a timeout.
3776 wait_for_tids (&user_data.wait, 100);
3779 /* Update remaining time */
3780 timeout -= mono_msec_ticks () - start_time;
3781 start_time = mono_msec_ticks ();
3783 if (orig_timeout != -1 && timeout < 0)
3786 while (user_data.wait.num > 0);
3788 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3794 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3796 MonoInternalThread *thread = (MonoInternalThread*)value;
3797 MonoDomain *domain = (MonoDomain*)user_data;
3800 /* No locking needed here */
3801 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3803 if (thread->cached_culture_info) {
3804 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3805 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3806 if (obj && obj->vtable->domain == domain)
3807 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3813 * mono_threads_clear_cached_culture:
3815 * Clear the cached_current_culture from all threads if it is in the
3819 mono_threads_clear_cached_culture (MonoDomain *domain)
3821 mono_threads_lock ();
3822 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3823 mono_threads_unlock ();
3827 * mono_thread_get_undeniable_exception:
3829 * Return an exception which needs to be raised when leaving a catch clause.
3830 * This is used for undeniable exception propagation.
3833 mono_thread_get_undeniable_exception (void)
3835 MonoInternalThread *thread = mono_thread_internal_current ();
3837 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3839 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3840 * exception if the thread no longer references a dying appdomain.
3842 thread->abort_exc->trace_ips = NULL;
3843 thread->abort_exc->stack_trace = NULL;
3844 return thread->abort_exc;
3850 #if MONO_SMALL_CONFIG
3851 #define NUM_STATIC_DATA_IDX 4
3852 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3856 #define NUM_STATIC_DATA_IDX 8
3857 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3858 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3862 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3863 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3866 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3868 gpointer *static_data = (gpointer *)addr;
3870 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3871 void **ptr = (void **)static_data [i];
3876 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3877 void **p = ptr + idx;
3880 mark_func ((MonoObject**)p, gc_data);
3886 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3888 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3892 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3894 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3898 * mono_alloc_static_data
3900 * Allocate memory blocks for storing threads or context static data
3903 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3905 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3908 gpointer* static_data = *static_data_ptr;
3910 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3911 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3913 if (mono_gc_user_markers_supported ()) {
3914 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3915 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3917 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3918 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3921 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3922 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3923 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3924 *static_data_ptr = static_data;
3925 static_data [0] = static_data;
3928 for (i = 1; i <= idx; ++i) {
3929 if (static_data [i])
3932 if (mono_gc_user_markers_supported ())
3933 static_data [i] = g_malloc0 (static_data_size [i]);
3935 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3936 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3937 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3942 mono_free_static_data (gpointer* static_data)
3945 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3946 gpointer p = static_data [i];
3950 * At this point, the static data pointer array is still registered with the
3951 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3952 * data. Freeing the individual arrays without first nulling their slots
3953 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3954 * such an already freed array. See bug #13813.
3956 static_data [i] = NULL;
3957 mono_memory_write_barrier ();
3958 if (mono_gc_user_markers_supported ())
3961 mono_gc_free_fixed (p);
3963 mono_gc_free_fixed (static_data);
3967 * mono_init_static_data_info
3969 * Initializes static data counters
3971 static void mono_init_static_data_info (StaticDataInfo *static_data)
3973 static_data->idx = 0;
3974 static_data->offset = 0;
3975 static_data->freelist = NULL;
3979 * mono_alloc_static_data_slot
3981 * Generates an offset for static data. static_data contains the counters
3982 * used to generate it.
3985 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3987 if (!static_data->idx && !static_data->offset) {
3989 * we use the first chunk of the first allocation also as
3990 * an array for the rest of the data
3992 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3994 static_data->offset += align - 1;
3995 static_data->offset &= ~(align - 1);
3996 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3997 static_data->idx ++;
3998 g_assert (size <= static_data_size [static_data->idx]);
3999 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4000 static_data->offset = 0;
4002 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4003 static_data->offset += size;
4008 * ensure thread static fields already allocated are valid for thread
4009 * This function is called when a thread is created or on thread attach.
4012 thread_adjust_static_data (MonoInternalThread *thread)
4014 mono_threads_lock ();
4015 if (thread_static_info.offset || thread_static_info.idx > 0) {
4016 /* get the current allocated size */
4017 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4018 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4020 mono_threads_unlock ();
4024 * LOCKING: requires that threads_mutex is held
4027 context_adjust_static_data (MonoAppContext *ctx)
4029 if (context_static_info.offset || context_static_info.idx > 0) {
4030 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4031 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4032 ctx->data->static_data = ctx->static_data;
4037 * LOCKING: requires that threads_mutex is held
4040 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4042 MonoInternalThread *thread = (MonoInternalThread *)value;
4043 guint32 offset = GPOINTER_TO_UINT (user);
4045 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4049 * LOCKING: requires that threads_mutex is held
4052 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4054 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4059 guint32 offset = GPOINTER_TO_UINT (user);
4060 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4061 ctx->data->static_data = ctx->static_data;
4064 static StaticDataFreeList*
4065 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4067 StaticDataFreeList* prev = NULL;
4068 StaticDataFreeList* tmp = static_data->freelist;
4070 if (tmp->size == size) {
4072 prev->next = tmp->next;
4074 static_data->freelist = tmp->next;
4083 #if SIZEOF_VOID_P == 4
4090 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4092 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4094 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4095 MonoBitSet *rb = sets [idx];
4096 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4097 offset /= sizeof (uintptr_t);
4098 /* offset is now the bitmap offset */
4099 for (int i = 0; i < numbits; ++i) {
4100 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4101 mono_bitset_set_fast (rb, offset + i);
4106 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4108 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4109 MonoBitSet *rb = sets [idx];
4110 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4111 offset /= sizeof (uintptr_t);
4112 /* offset is now the bitmap offset */
4113 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4114 mono_bitset_clear_fast (rb, offset + i);
4118 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4120 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4122 StaticDataInfo *info;
4125 if (static_type == SPECIAL_STATIC_THREAD) {
4126 info = &thread_static_info;
4127 sets = thread_reference_bitmaps;
4129 info = &context_static_info;
4130 sets = context_reference_bitmaps;
4133 mono_threads_lock ();
4135 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4139 offset = item->offset;
4142 offset = mono_alloc_static_data_slot (info, size, align);
4145 update_reference_bitmap (sets, offset, bitmap, numbits);
4147 if (static_type == SPECIAL_STATIC_THREAD) {
4148 /* This can be called during startup */
4149 if (threads != NULL)
4150 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4152 if (contexts != NULL)
4153 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4155 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4158 mono_threads_unlock ();
4164 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4166 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4168 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4169 return get_thread_static_data (thread, offset);
4171 return get_context_static_data (thread->current_appcontext, offset);
4176 mono_get_special_static_data (guint32 offset)
4178 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4187 * LOCKING: requires that threads_mutex is held
4190 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4192 MonoInternalThread *thread = (MonoInternalThread *)value;
4193 OffsetSize *data = (OffsetSize *)user;
4194 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4195 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4198 if (!thread->static_data || !thread->static_data [idx])
4200 ptr = ((char*) thread->static_data [idx]) + off;
4201 mono_gc_bzero_atomic (ptr, data->size);
4205 * LOCKING: requires that threads_mutex is held
4208 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4210 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4215 OffsetSize *data = (OffsetSize *)user;
4216 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4217 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4220 if (!ctx->static_data || !ctx->static_data [idx])
4223 ptr = ((char*) ctx->static_data [idx]) + off;
4224 mono_gc_bzero_atomic (ptr, data->size);
4228 do_free_special_slot (guint32 offset, guint32 size)
4230 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4232 StaticDataInfo *info;
4234 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4235 info = &thread_static_info;
4236 sets = thread_reference_bitmaps;
4238 info = &context_static_info;
4239 sets = context_reference_bitmaps;
4242 guint32 data_offset = offset;
4243 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4244 OffsetSize data = { data_offset, size };
4246 clear_reference_bitmap (sets, data.offset, data.size);
4248 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4249 if (threads != NULL)
4250 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4252 if (contexts != NULL)
4253 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4256 if (!mono_runtime_is_shutting_down ()) {
4257 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4259 item->offset = offset;
4262 item->next = info->freelist;
4263 info->freelist = item;
4268 do_free_special (gpointer key, gpointer value, gpointer data)
4270 MonoClassField *field = (MonoClassField *)key;
4271 guint32 offset = GPOINTER_TO_UINT (value);
4274 size = mono_type_size (field->type, &align);
4275 do_free_special_slot (offset, size);
4279 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4281 mono_threads_lock ();
4283 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4285 mono_threads_unlock ();
4289 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4291 /* Only ever called for ThreadLocal instances */
4292 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4294 mono_threads_lock ();
4295 do_free_special_slot (offset, size);
4296 mono_threads_unlock ();
4300 static void CALLBACK dummy_apc (ULONG_PTR param)
4306 * mono_thread_execute_interruption
4308 * Performs the operation that the requested thread state requires (abort,
4311 static MonoException*
4312 mono_thread_execute_interruption (void)
4314 MonoInternalThread *thread = mono_thread_internal_current ();
4316 LOCK_THREAD (thread);
4318 /* MonoThread::interruption_requested can only be changed with atomics */
4319 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4320 /* this will consume pending APC calls */
4322 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4324 InterlockedDecrement (&thread_interruption_requested);
4326 /* Clear the interrupted flag of the thread so it can wait again */
4327 mono_thread_info_clear_self_interrupt ();
4330 if ((thread->state & ThreadState_AbortRequested) != 0) {
4331 UNLOCK_THREAD (thread);
4332 if (thread->abort_exc == NULL) {
4334 * This might be racy, but it has to be called outside the lock
4335 * since it calls managed code.
4337 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4339 return thread->abort_exc;
4341 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4342 self_suspend_internal (thread);
4345 else if ((thread->state & ThreadState_StopRequested) != 0) {
4346 /* FIXME: do this through the JIT? */
4348 UNLOCK_THREAD (thread);
4350 mono_thread_exit ();
4352 } else if (thread->pending_exception) {
4355 exc = thread->pending_exception;
4356 thread->pending_exception = NULL;
4358 UNLOCK_THREAD (thread);
4360 } else if (thread->thread_interrupt_requested) {
4362 thread->thread_interrupt_requested = FALSE;
4363 UNLOCK_THREAD (thread);
4365 return(mono_get_exception_thread_interrupted ());
4368 UNLOCK_THREAD (thread);
4374 * mono_thread_request_interruption
4376 * A signal handler can call this method to request the interruption of a
4377 * thread. The result of the interruption will depend on the current state of
4378 * the thread. If the result is an exception that needs to be throw, it is
4379 * provided as return value.
4382 mono_thread_request_interruption (gboolean running_managed)
4384 MonoInternalThread *thread = mono_thread_internal_current ();
4386 /* The thread may already be stopping */
4391 if (thread->interrupt_on_stop &&
4392 thread->state & ThreadState_StopRequested &&
4393 thread->state & ThreadState_Background)
4397 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4399 InterlockedIncrement (&thread_interruption_requested);
4401 if (!running_managed || is_running_protected_wrapper ()) {
4402 /* Can't stop while in unmanaged code. Increase the global interruption
4403 request count. When exiting the unmanaged method the count will be
4404 checked and the thread will be interrupted. */
4406 if (mono_thread_notify_pending_exc_fn && !running_managed)
4407 /* The JIT will notify the thread about the interruption */
4408 /* This shouldn't take any locks */
4409 mono_thread_notify_pending_exc_fn (NULL);
4411 /* this will awake the thread if it is in WaitForSingleObject
4413 /* Our implementation of this function ignores the func argument */
4415 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4417 mono_thread_info_self_interrupt ();
4422 return mono_thread_execute_interruption ();
4426 /*This function should be called by a thread after it has exited all of
4427 * its handle blocks at interruption time.*/
4429 mono_thread_resume_interruption (void)
4431 MonoInternalThread *thread = mono_thread_internal_current ();
4432 gboolean still_aborting;
4434 /* The thread may already be stopping */
4438 LOCK_THREAD (thread);
4439 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4440 UNLOCK_THREAD (thread);
4442 /*This can happen if the protected block called Thread::ResetAbort*/
4443 if (!still_aborting)
4446 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4448 InterlockedIncrement (&thread_interruption_requested);
4450 mono_thread_info_self_interrupt ();
4452 return mono_thread_execute_interruption ();
4455 gboolean mono_thread_interruption_requested ()
4457 if (thread_interruption_requested) {
4458 MonoInternalThread *thread = mono_thread_internal_current ();
4459 /* The thread may already be stopping */
4461 return (thread->interruption_requested);
4466 static MonoException*
4467 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4469 MonoInternalThread *thread = mono_thread_internal_current ();
4471 /* The thread may already be stopping */
4475 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4476 MonoException* exc = mono_thread_execute_interruption ();
4484 * Performs the interruption of the current thread, if one has been requested,
4485 * and the thread is not running a protected wrapper.
4486 * Return the exception which needs to be thrown, if any.
4489 mono_thread_interruption_checkpoint (void)
4491 return mono_thread_interruption_checkpoint_request (FALSE);
4495 * Performs the interruption of the current thread, if one has been requested.
4496 * Return the exception which needs to be thrown, if any.
4499 mono_thread_force_interruption_checkpoint_noraise (void)
4501 return mono_thread_interruption_checkpoint_request (TRUE);
4505 * mono_thread_get_and_clear_pending_exception:
4507 * Return any pending exceptions for the current thread and clear it as a side effect.
4510 mono_thread_get_and_clear_pending_exception (void)
4512 MonoInternalThread *thread = mono_thread_internal_current ();
4514 /* The thread may already be stopping */
4518 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4519 return mono_thread_execute_interruption ();
4522 if (thread->pending_exception) {
4523 MonoException *exc = thread->pending_exception;
4525 thread->pending_exception = NULL;
4533 * mono_set_pending_exception:
4535 * Set the pending exception of the current thread to EXC.
4536 * The exception will be thrown when execution returns to managed code.
4539 mono_set_pending_exception (MonoException *exc)
4541 MonoInternalThread *thread = mono_thread_internal_current ();
4543 /* The thread may already be stopping */
4547 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4549 mono_thread_request_interruption (FALSE);
4553 * mono_thread_interruption_request_flag:
4555 * Returns the address of a flag that will be non-zero if an interruption has
4556 * been requested for a thread. The thread to interrupt may not be the current
4557 * thread, so an additional call to mono_thread_interruption_requested() or
4558 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4561 gint32* mono_thread_interruption_request_flag ()
4563 return &thread_interruption_requested;
4567 mono_thread_init_apartment_state (void)
4570 MonoInternalThread* thread = mono_thread_internal_current ();
4572 /* Positive return value indicates success, either
4573 * S_OK if this is first CoInitialize call, or
4574 * S_FALSE if CoInitialize already called, but with same
4575 * threading model. A negative value indicates failure,
4576 * probably due to trying to change the threading model.
4578 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4579 ? COINIT_APARTMENTTHREADED
4580 : COINIT_MULTITHREADED) < 0) {
4581 thread->apartment_state = ThreadApartmentState_Unknown;
4587 mono_thread_cleanup_apartment_state (void)
4590 MonoInternalThread* thread = mono_thread_internal_current ();
4592 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4599 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4601 LOCK_THREAD (thread);
4602 thread->state |= state;
4603 UNLOCK_THREAD (thread);
4607 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4609 LOCK_THREAD (thread);
4610 thread->state &= ~state;
4611 UNLOCK_THREAD (thread);
4615 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4617 gboolean ret = FALSE;
4619 LOCK_THREAD (thread);
4621 if ((thread->state & test) != 0) {
4625 UNLOCK_THREAD (thread);
4630 static gboolean has_tls_get = FALSE;
4633 mono_runtime_set_has_tls_get (gboolean val)
4639 mono_runtime_has_tls_get (void)
4645 self_interrupt_thread (void *_unused)
4647 MonoThreadInfo *info = mono_thread_info_current ();
4648 MonoException *exc = mono_thread_execute_interruption ();
4649 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4650 mono_raise_exception_with_context (exc, &info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX].ctx); /* FIXME using thread_saved_state [ASYNC_SUSPEND_STATE_INDEX] can race with another suspend coming in. */
4651 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4655 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4659 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4663 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4665 MonoJitInfo **dest = (MonoJitInfo **)data;
4671 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4673 MonoJitInfo *ji = NULL;
4676 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4681 MonoInternalThread *thread;
4682 gboolean install_async_abort;
4683 MonoThreadInfoInterruptToken *interrupt_token;
4686 static SuspendThreadResult
4687 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4689 AbortThreadData *data = (AbortThreadData *)ud;
4690 MonoInternalThread *thread = data->thread;
4691 MonoJitInfo *ji = NULL;
4692 gboolean protected_wrapper;
4693 gboolean running_managed;
4695 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4696 return MonoResumeThread;
4698 /*someone is already interrupting it*/
4699 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4700 return MonoResumeThread;
4702 InterlockedIncrement (&thread_interruption_requested);
4704 ji = mono_thread_info_get_last_managed (info);
4705 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4706 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4708 if (!protected_wrapper && running_managed) {
4709 /*We are in managed code*/
4710 /*Set the thread to call */
4711 if (data->install_async_abort)
4712 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4713 return MonoResumeThread;
4715 if (mono_thread_notify_pending_exc_fn)
4716 /* The JIT will notify the thread about the interruption */
4717 mono_thread_notify_pending_exc_fn (info);
4720 * This will cause waits to be broken.
4721 * It will also prevent the thread from entering a wait, so if the thread returns
4722 * from the wait before it receives the abort signal, it will just spin in the wait
4723 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4726 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4728 return MonoResumeThread;
4733 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4735 AbortThreadData data = { 0 };
4736 data.thread = thread;
4737 data.install_async_abort = install_async_abort;
4740 FIXME this is insanely broken, it doesn't cause interruption to happen
4741 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4743 if (thread == mono_thread_internal_current ()) {
4744 /* Do it synchronously */
4745 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4747 mono_raise_exception (exc);
4749 mono_thread_info_self_interrupt ();
4754 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4755 if (data.interrupt_token)
4756 mono_thread_info_finish_interrupt (data.interrupt_token);
4757 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4761 MonoInternalThread *thread;
4763 MonoThreadInfoInterruptToken *interrupt_token;
4764 } SuspendThreadData;
4766 static SuspendThreadResult
4767 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4769 SuspendThreadData *data = (SuspendThreadData *)ud;
4770 MonoInternalThread *thread = data->thread;
4771 MonoJitInfo *ji = NULL;
4772 gboolean protected_wrapper;
4773 gboolean running_managed;
4775 ji = mono_thread_info_get_last_managed (info);
4776 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4777 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4779 if (running_managed && !protected_wrapper) {
4780 thread->state &= ~ThreadState_SuspendRequested;
4781 thread->state |= ThreadState_Suspended;
4782 return KeepSuspended;
4784 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4785 InterlockedIncrement (&thread_interruption_requested);
4786 if (data->interrupt)
4787 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4789 if (mono_thread_notify_pending_exc_fn && !running_managed)
4790 /* The JIT will notify the thread about the interruption */
4791 mono_thread_notify_pending_exc_fn (info);
4792 return MonoResumeThread;
4797 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4799 if (thread == mono_thread_internal_current ()) {
4800 mono_thread_info_begin_self_suspend ();
4801 //XXX replace this with better named functions
4802 thread->state &= ~ThreadState_SuspendRequested;
4803 thread->state |= ThreadState_Suspended;
4804 UNLOCK_THREAD (thread);
4805 mono_thread_info_end_self_suspend ();
4807 SuspendThreadData data = { 0 };
4808 data.thread = thread;
4809 data.interrupt = interrupt;
4811 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4812 if (data.interrupt_token)
4813 mono_thread_info_finish_interrupt (data.interrupt_token);
4814 UNLOCK_THREAD (thread);
4818 /*This is called with @thread synch_cs held and it must release it*/
4820 self_suspend_internal (MonoInternalThread *thread)
4822 mono_thread_info_begin_self_suspend ();
4823 thread->state &= ~ThreadState_SuspendRequested;
4824 thread->state |= ThreadState_Suspended;
4825 UNLOCK_THREAD (thread);
4826 mono_thread_info_end_self_suspend ();
4831 * mono_thread_is_foreign:
4832 * @thread: the thread to query
4834 * This function allows one to determine if a thread was created by the mono runtime and has
4835 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4837 * Returns: true if @thread was not created by the runtime.
4840 mono_thread_is_foreign (MonoThread *thread)
4842 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4843 return info->runtime_thread == FALSE;
4847 * mono_add_joinable_thread:
4849 * Add TID to the list of joinable threads.
4850 * LOCKING: Acquires the threads lock.
4853 mono_threads_add_joinable_thread (gpointer tid)
4857 * We cannot detach from threads because it causes problems like
4858 * 2fd16f60/r114307. So we collect them and join them when
4859 * we have time (in he finalizer thread).
4861 joinable_threads_lock ();
4862 if (!joinable_threads)
4863 joinable_threads = g_hash_table_new (NULL, NULL);
4864 g_hash_table_insert (joinable_threads, tid, tid);
4865 joinable_thread_count ++;
4866 joinable_threads_unlock ();
4868 mono_gc_finalize_notify ();
4873 * mono_threads_join_threads:
4875 * Join all joinable threads. This is called from the finalizer thread.
4876 * LOCKING: Acquires the threads lock.
4879 mono_threads_join_threads (void)
4882 GHashTableIter iter;
4889 if (!joinable_thread_count)
4893 joinable_threads_lock ();
4895 if (g_hash_table_size (joinable_threads)) {
4896 g_hash_table_iter_init (&iter, joinable_threads);
4897 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4898 thread = (pthread_t)tid;
4899 g_hash_table_remove (joinable_threads, key);
4900 joinable_thread_count --;
4903 joinable_threads_unlock ();
4905 if (thread != pthread_self ())
4906 /* This shouldn't block */
4907 pthread_join (thread, NULL);
4918 * Wait for thread TID to exit.
4919 * LOCKING: Acquires the threads lock.
4922 mono_thread_join (gpointer tid)
4926 gboolean found = FALSE;
4928 joinable_threads_lock ();
4929 if (!joinable_threads)
4930 joinable_threads = g_hash_table_new (NULL, NULL);
4931 if (g_hash_table_lookup (joinable_threads, tid)) {
4932 g_hash_table_remove (joinable_threads, tid);
4933 joinable_thread_count --;
4936 joinable_threads_unlock ();
4939 thread = (pthread_t)tid;
4940 pthread_join (thread, NULL);
4945 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4947 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4948 mono_thread_interruption_checkpoint ();
4951 static inline gboolean
4952 is_appdomainunloaded_exception (MonoClass *klass)
4954 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4956 if (!app_domain_unloaded_exception_klass)
4957 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4958 g_assert (app_domain_unloaded_exception_klass);
4960 return klass == app_domain_unloaded_exception_klass;
4963 static inline gboolean
4964 is_threadabort_exception (MonoClass *klass)
4966 return klass == mono_defaults.threadabortexception_class;
4970 mono_thread_internal_unhandled_exception (MonoObject* exc)
4972 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4973 MonoClass *klass = exc->vtable->klass;
4974 if (is_threadabort_exception (klass)) {
4975 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4976 } else if (!is_appdomainunloaded_exception (klass)) {
4977 mono_unhandled_exception (exc);
4978 if (mono_environment_exitcode_get () == 1)
4985 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4987 mono_threads_get_thread_dump (out_threads, out_stack_traces);