2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/mono-threads-coop.h>
41 #include <mono/utils/hazard-pointer.h>
42 #include <mono/utils/mono-tls.h>
43 #include <mono/utils/atomic.h>
44 #include <mono/utils/mono-memory-model.h>
45 #include <mono/utils/mono-threads-coop.h>
46 #include <mono/utils/mono-error-internals.h>
48 #include <mono/metadata/gc-internals.h>
49 #include <mono/metadata/reflection-internals.h>
55 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
56 #define USE_TKILL_ON_ANDROID 1
59 #ifdef PLATFORM_ANDROID
62 #ifdef USE_TKILL_ON_ANDROID
63 extern int tkill (pid_t tid, int signal);
67 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
68 #define THREAD_DEBUG(a)
69 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
70 #define THREAD_WAIT_DEBUG(a)
71 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
72 #define LIBGC_DEBUG(a)
74 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
75 #define SPIN_LOCK(i) do { \
76 if (SPIN_TRYLOCK (i)) \
80 #define SPIN_UNLOCK(i) i = 0
82 #define LOCK_THREAD(thread) lock_thread((thread))
83 #define UNLOCK_THREAD(thread) unlock_thread((thread))
87 guint32 (*func)(void *);
103 typedef struct _StaticDataFreeList StaticDataFreeList;
104 struct _StaticDataFreeList {
105 StaticDataFreeList *next;
113 StaticDataFreeList *freelist;
116 /* Number of cached culture objects in the MonoThread->cached_culture_info array
117 * (per-type): we use the first NUM entries for CultureInfo and the last for
118 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
120 #define NUM_CACHED_CULTURES 4
121 #define CULTURES_START_IDX 0
122 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
124 /* Controls access to the 'threads' hash table */
125 static void mono_threads_lock (void);
126 static void mono_threads_unlock (void);
127 static MonoCoopMutex threads_mutex;
129 /* Controls access to the 'joinable_threads' hash table */
130 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
131 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
132 static mono_mutex_t joinable_threads_mutex;
134 /* Holds current status of static data heap */
135 static StaticDataInfo thread_static_info;
136 static StaticDataInfo context_static_info;
138 /* The hash of existing threads (key is thread ID, value is
139 * MonoInternalThread*) that need joining before exit
141 static MonoGHashTable *threads=NULL;
143 /* List of app context GC handles.
144 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
146 static GHashTable *contexts = NULL;
148 /* Cleanup queue for contexts. */
149 static MonoReferenceQueue *context_queue;
152 * Threads which are starting up and they are not in the 'threads' hash yet.
153 * When handle_store is called for a thread, it will be removed from this hash table.
154 * Protected by mono_threads_lock ().
156 static MonoGHashTable *threads_starting_up = NULL;
158 /* The TLS key that holds the MonoObject assigned to each thread */
159 static MonoNativeTlsKey current_object_key;
162 /* Protected by the threads lock */
163 static GHashTable *joinable_threads;
164 static int joinable_thread_count;
166 #ifdef MONO_HAVE_FAST_TLS
167 /* we need to use both the Tls* functions and __thread because
168 * the gc needs to see all the threads
170 MONO_FAST_TLS_DECLARE(tls_current_object);
171 #define SET_CURRENT_OBJECT(x) do { \
172 MONO_FAST_TLS_SET (tls_current_object, x); \
173 mono_native_tls_set_value (current_object_key, x); \
175 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
177 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
178 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
181 /* function called at thread start */
182 static MonoThreadStartCB mono_thread_start_cb = NULL;
184 /* function called at thread attach */
185 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
187 /* function called at thread cleanup */
188 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
190 /* The default stack size for each thread */
191 static guint32 default_stacksize = 0;
192 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
194 static void thread_adjust_static_data (MonoInternalThread *thread);
195 static void context_adjust_static_data (MonoAppContext *ctx);
196 static void mono_free_static_data (gpointer* static_data);
197 static void mono_init_static_data_info (StaticDataInfo *static_data);
198 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
199 static gboolean mono_thread_resume (MonoInternalThread* thread);
200 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
201 static void self_abort_internal (MonoError *error);
202 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
203 static void self_suspend_internal (void);
205 static MonoException* mono_thread_execute_interruption (void);
206 static void ref_stack_destroy (gpointer rs);
208 /* Spin lock for InterlockedXXX 64 bit functions */
209 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
210 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
211 static mono_mutex_t interlocked_mutex;
213 /* global count of thread interruptions requested */
214 static gint32 thread_interruption_requested = 0;
216 /* Event signaled when a thread changes its background mode */
217 static HANDLE background_change_event;
219 static gboolean shutting_down = FALSE;
221 static gint32 managed_thread_id_counter = 0;
223 /* Class lazy loading functions */
224 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
227 mono_threads_lock (void)
229 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
233 mono_threads_unlock (void)
235 mono_locks_coop_release (&threads_mutex, ThreadsLock);
240 get_next_managed_thread_id (void)
242 return InterlockedIncrement (&managed_thread_id_counter);
246 mono_thread_get_tls_key (void)
248 return current_object_key;
252 mono_thread_get_tls_offset (void)
257 if (current_object_key)
258 offset = current_object_key;
260 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
265 static inline MonoNativeThreadId
266 thread_get_tid (MonoInternalThread *thread)
268 /* We store the tid as a guint64 to keep the object layout constant between platforms */
269 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
272 /* handle_store() and handle_remove() manage the array of threads that
273 * still need to be waited for when the main thread exits.
275 * If handle_store() returns FALSE the thread must not be started
276 * because Mono is shutting down.
278 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
280 mono_threads_lock ();
282 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
284 if (threads_starting_up)
285 mono_g_hash_table_remove (threads_starting_up, thread);
287 if (shutting_down && !force_attach) {
288 mono_threads_unlock ();
293 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
294 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
297 /* We don't need to duplicate thread->handle, because it is
298 * only closed when the thread object is finalized by the GC.
300 g_assert (thread->internal_thread);
301 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
302 thread->internal_thread);
304 mono_threads_unlock ();
309 static gboolean handle_remove(MonoInternalThread *thread)
312 gsize tid = thread->tid;
314 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
316 mono_threads_lock ();
319 /* We have to check whether the thread object for the
320 * tid is still the same in the table because the
321 * thread might have been destroyed and the tid reused
322 * in the meantime, in which case the tid would be in
323 * the table, but with another thread object.
325 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
326 mono_g_hash_table_remove (threads, (gpointer)tid);
335 mono_threads_unlock ();
337 /* Don't close the handle here, wait for the object finalizer
338 * to do it. Otherwise, the following race condition applies:
340 * 1) Thread exits (and handle_remove() closes the handle)
342 * 2) Some other handle is reassigned the same slot
344 * 3) Another thread tries to join the first thread, and
345 * blocks waiting for the reassigned handle to be signalled
346 * (which might never happen). This is possible, because the
347 * thread calling Join() still has a reference to the first
353 static void ensure_synch_cs_set (MonoInternalThread *thread)
355 MonoCoopMutex *synch_cs;
357 if (thread->synch_cs != NULL) {
361 synch_cs = g_new0 (MonoCoopMutex, 1);
362 mono_coop_mutex_init_recursive (synch_cs);
364 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
365 synch_cs, NULL) != NULL) {
366 /* Another thread must have installed this CS */
367 mono_coop_mutex_destroy (synch_cs);
373 lock_thread (MonoInternalThread *thread)
375 if (!thread->synch_cs)
376 ensure_synch_cs_set (thread);
378 g_assert (thread->synch_cs);
380 mono_coop_mutex_lock (thread->synch_cs);
384 unlock_thread (MonoInternalThread *thread)
386 mono_coop_mutex_unlock (thread->synch_cs);
390 * NOTE: this function can be called also for threads different from the current one:
391 * make sure no code called from it will ever assume it is run on the thread that is
392 * getting cleaned up.
394 static void thread_cleanup (MonoInternalThread *thread)
396 g_assert (thread != NULL);
398 if (thread->abort_state_handle) {
399 mono_gchandle_free (thread->abort_state_handle);
400 thread->abort_state_handle = 0;
402 thread->abort_exc = NULL;
403 thread->current_appcontext = NULL;
406 * This is necessary because otherwise we might have
407 * cross-domain references which will not get cleaned up when
408 * the target domain is unloaded.
410 if (thread->cached_culture_info) {
412 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
413 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
417 * thread->synch_cs can be NULL if this was called after
418 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
419 * This can happen only during shutdown.
420 * The shutting_down flag is not always set, so we can't assert on it.
422 if (thread->synch_cs)
423 LOCK_THREAD (thread);
425 thread->state |= ThreadState_Stopped;
426 thread->state &= ~ThreadState_Background;
428 if (thread->synch_cs)
429 UNLOCK_THREAD (thread);
432 An interruption request has leaked to cleanup. Adjust the global counter.
434 This can happen is the abort source thread finds the abortee (this) thread
435 in unmanaged code. If this thread never trips back to managed code or check
436 the local flag it will be left set and positively unbalance the global counter.
438 Leaving the counter unbalanced will cause a performance degradation since all threads
439 will now keep checking their local flags all the time.
441 if (InterlockedExchange (&thread->interruption_requested, 0))
442 InterlockedDecrement (&thread_interruption_requested);
444 /* if the thread is not in the hash it has been removed already */
445 if (!handle_remove (thread)) {
446 if (thread == mono_thread_internal_current ()) {
447 mono_domain_unset ();
448 mono_memory_barrier ();
450 /* This needs to be called even if handle_remove () fails */
451 if (mono_thread_cleanup_fn)
452 mono_thread_cleanup_fn (thread_get_tid (thread));
455 mono_release_type_locks (thread);
457 /* Can happen when we attach the profiler helper thread in order to heapshot. */
458 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
459 mono_profiler_thread_end (thread->tid);
461 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
463 if (thread == mono_thread_internal_current ()) {
465 * This will signal async signal handlers that the thread has exited.
466 * The profiler callback needs this to be set, so it cannot be done earlier.
468 mono_domain_unset ();
469 mono_memory_barrier ();
472 if (thread == mono_thread_internal_current ())
473 mono_thread_pop_appdomain_ref ();
475 thread->cached_culture_info = NULL;
477 mono_free_static_data (thread->static_data);
478 thread->static_data = NULL;
479 ref_stack_destroy (thread->appdomain_refs);
480 thread->appdomain_refs = NULL;
482 if (mono_thread_cleanup_fn)
483 mono_thread_cleanup_fn (thread_get_tid (thread));
485 if (mono_gc_is_moving ()) {
486 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
487 thread->thread_pinning_ref = NULL;
493 * A special static data offset (guint32) consists of 3 parts:
495 * [0] 6-bit index into the array of chunks.
496 * [6] 25-bit offset into the array.
497 * [31] Bit indicating thread or context static.
502 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
513 } SpecialStaticOffset;
515 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
516 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
518 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
519 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
520 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
521 (((SpecialStaticOffset *) &(x))->fields.f)
524 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
526 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
528 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
529 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
531 return ((char *) thread->static_data [idx]) + off;
535 get_context_static_data (MonoAppContext *ctx, guint32 offset)
537 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
539 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
540 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
542 return ((char *) ctx->static_data [idx]) + off;
546 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
548 static MonoClassField *current_thread_field = NULL;
552 if (!current_thread_field) {
553 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
554 g_assert (current_thread_field);
557 mono_class_vtable (domain, mono_defaults.thread_class);
558 mono_domain_lock (domain);
559 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
560 mono_domain_unlock (domain);
563 return (MonoThread **)get_thread_static_data (thread, offset);
567 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
569 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
571 g_assert (current->obj.vtable->domain == domain);
573 g_assert (!*current_thread_ptr);
574 *current_thread_ptr = current;
578 create_thread_object (MonoDomain *domain)
581 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
582 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, &error);
583 /* only possible failure mode is OOM, from which we don't expect to recover. */
584 mono_error_assert_ok (&error);
589 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
593 thread = create_thread_object (domain);
594 thread->priority = THREAD_PRIORITY_NORMAL;
596 MONO_OBJECT_SETREF (thread, internal_thread, internal);
601 static MonoInternalThread*
602 create_internal_thread (void)
605 MonoInternalThread *thread;
608 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
609 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
610 /* only possible failure mode is OOM, from which we don't exect to recover */
611 mono_error_assert_ok (&error);
613 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
614 mono_coop_mutex_init_recursive (thread->synch_cs);
616 thread->apartment_state = ThreadApartmentState_Unknown;
617 thread->managed_id = get_next_managed_thread_id ();
618 if (mono_gc_is_moving ()) {
619 thread->thread_pinning_ref = thread;
620 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
627 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
629 MonoDomain *domain = mono_get_root_domain ();
631 if (!candidate || candidate->obj.vtable->domain != domain) {
632 candidate = new_thread_with_internal (domain, thread);
634 set_current_thread_for_domain (domain, thread, candidate);
635 g_assert (!thread->root_domain_thread);
636 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
640 static guint32 WINAPI start_wrapper_internal(void *data)
643 MonoThreadInfo *info;
644 StartInfo *start_info = (StartInfo *)data;
645 guint32 (*start_func)(void *);
649 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
652 MonoInternalThread *internal = start_info->obj->internal_thread;
653 MonoObject *start_delegate = start_info->delegate;
654 MonoDomain *domain = start_info->obj->obj.vtable->domain;
656 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
658 /* We can be sure start_info->obj->tid and
659 * start_info->obj->handle have been set, because the thread
660 * was created suspended, and these values were set before the
664 info = mono_thread_info_current ();
666 internal->thread_info = info;
667 internal->small_id = info->small_id;
671 SET_CURRENT_OBJECT (internal);
673 /* Every thread references the appdomain which created it */
674 mono_thread_push_appdomain_ref (domain);
676 if (!mono_domain_set (domain, FALSE)) {
677 /* No point in raising an appdomain_unloaded exception here */
678 /* FIXME: Cleanup here */
679 mono_thread_pop_appdomain_ref ();
683 start_func = start_info->func;
684 start_arg = start_info->obj->start_obj;
686 start_arg = start_info->start_arg;
688 /* We have to do this here because mono_thread_new_init()
689 requires that root_domain_thread is set up. */
690 thread_adjust_static_data (internal);
691 init_root_domain_thread (internal, start_info->obj);
693 /* This MUST be called before any managed code can be
694 * executed, as it calls the callback function that (for the
695 * jit) sets the lmf marker.
697 mono_thread_new_init (tid, &tid, start_func);
698 internal->stack_ptr = &tid;
699 if (domain != mono_get_root_domain ())
700 set_current_thread_for_domain (domain, internal, start_info->obj);
702 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
704 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
706 /* On 2.0 profile (and higher), set explicitly since state might have been
708 if (internal->apartment_state == ThreadApartmentState_Unknown)
709 internal->apartment_state = ThreadApartmentState_MTA;
711 mono_thread_init_apartment_state ();
713 if(internal->start_notify!=NULL) {
714 /* Let the thread that called Start() know we're
717 ReleaseSemaphore (internal->start_notify, 1, NULL);
721 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
725 * Call this after calling start_notify, since the profiler callback might want
726 * to lock the thread, and the lock is held by thread_start () which waits for
729 mono_profiler_thread_start (tid);
731 /* if the name was set before starting, we didn't invoke the profiler callback */
732 if (internal->name) {
733 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
734 mono_profiler_thread_name (internal->tid, tname);
735 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
739 /* start_func is set only for unmanaged start functions */
741 start_func (start_arg);
744 g_assert (start_delegate != NULL);
745 args [0] = start_arg;
746 /* we may want to handle the exception here. See comment below on unhandled exceptions */
747 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
748 mono_error_raise_exception (&error); /* OK, triggers unhandled exn handler */
751 /* If the thread calls ExitThread at all, this remaining code
752 * will not be executed, but the main thread will eventually
753 * call thread_cleanup() on this thread's behalf.
756 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
758 /* Do any cleanup needed for apartment state. This
759 * cannot be done in thread_cleanup since thread_cleanup could be
760 * called for a thread other than the current thread.
761 * mono_thread_cleanup_apartment_state cleans up apartment
762 * for the current thead */
763 mono_thread_cleanup_apartment_state ();
765 thread_cleanup (internal);
769 /* Remove the reference to the thread object in the TLS data,
770 * so the thread object can be finalized. This won't be
771 * reached if the thread threw an uncaught exception, so those
772 * thread handles will stay referenced :-( (This is due to
773 * missing support for scanning thread-specific data in the
774 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
777 SET_CURRENT_OBJECT (NULL);
782 static guint32 WINAPI start_wrapper(void *data)
786 /* Avoid scanning the frames above this frame during a GC */
787 mono_gc_set_stack_end ((void*)&dummy);
789 return start_wrapper_internal (data);
795 * Common thread creation code.
796 * LOCKING: Acquires the threads lock.
799 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
802 HANDLE thread_handle;
803 MonoNativeThreadId tid;
807 * Join joinable threads to prevent running out of threads since the finalizer
808 * thread might be blocked/backlogged.
810 mono_threads_join_threads ();
812 mono_error_init (error);
814 mono_threads_lock ();
817 mono_threads_unlock ();
820 if (threads_starting_up == NULL) {
821 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
822 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
824 mono_g_hash_table_insert (threads_starting_up, thread, thread);
825 mono_threads_unlock ();
827 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
828 if (!internal->start_notify) {
829 mono_threads_lock ();
830 mono_g_hash_table_remove (threads_starting_up, thread);
831 mono_threads_unlock ();
832 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
838 stack_size = default_stacksize_for_thread (internal);
840 /* Create suspended, so we can do some housekeeping before the thread
843 tp.priority = thread->priority;
844 tp.stack_size = stack_size;
845 tp.creation_flags = CREATE_SUSPENDED;
847 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info, &tp, &tid);
849 if (thread_handle == NULL) {
850 /* The thread couldn't be created, so set an exception */
851 mono_threads_lock ();
852 mono_g_hash_table_remove (threads_starting_up, thread);
853 mono_threads_unlock ();
855 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
858 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
860 internal->handle = thread_handle;
861 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
863 internal->threadpool_thread = threadpool_thread;
864 if (threadpool_thread)
865 mono_thread_set_state (internal, ThreadState_Background);
867 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
869 /* Only store the handle when the thread is about to be
870 * launched, to avoid the main thread deadlocking while trying
871 * to clean up a thread that will never be signalled.
873 if (!handle_store (thread, FALSE))
876 mono_thread_info_resume (tid);
878 if (internal->start_notify) {
880 * Wait for the thread to set up its TLS data etc, so
881 * theres no potential race condition if someone tries
882 * to look up the data believing the thread has
885 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));
888 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
891 CloseHandle (internal->start_notify);
892 internal->start_notify = NULL;
895 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));
900 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
902 if (mono_thread_start_cb) {
903 mono_thread_start_cb (tid, stack_start, func);
907 void mono_threads_set_default_stacksize (guint32 stacksize)
909 default_stacksize = stacksize;
912 guint32 mono_threads_get_default_stacksize (void)
914 return default_stacksize;
918 * mono_thread_create_internal:
920 * ARG should not be a GC reference.
923 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
926 MonoInternalThread *internal;
927 StartInfo *start_info;
930 mono_error_init (error);
932 thread = create_thread_object (domain);
934 internal = create_internal_thread ();
936 MONO_OBJECT_SETREF (thread, internal_thread, internal);
938 start_info = g_new0 (StartInfo, 1);
939 start_info->func = (guint32 (*)(void *))func;
940 start_info->obj = thread;
941 start_info->start_arg = arg;
943 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, error);
944 return_val_if_nok (error, NULL);
946 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
947 #ifndef MONO_CROSS_COMPILE
948 if (mono_check_corlib_version () == NULL)
949 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
956 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
959 if (!mono_thread_create_checked (domain, func, arg, &error))
960 mono_error_cleanup (&error);
964 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
966 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
970 mono_thread_attach (MonoDomain *domain)
972 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
978 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
980 MonoThreadInfo *info;
981 MonoInternalThread *thread;
982 MonoThread *current_thread;
983 HANDLE thread_handle;
984 MonoNativeThreadId tid;
986 if ((thread = mono_thread_internal_current ())) {
987 if (domain != mono_domain_get ())
988 mono_domain_set (domain, TRUE);
989 /* Already attached */
990 return mono_thread_current ();
993 if (!mono_gc_register_thread (&domain)) {
994 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 ());
997 thread = create_internal_thread ();
999 thread_handle = mono_thread_info_open_handle ();
1000 g_assert (thread_handle);
1002 tid=mono_native_thread_id_get ();
1004 thread->handle = thread_handle;
1005 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
1006 thread->stack_ptr = &tid;
1008 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1010 info = mono_thread_info_current ();
1012 thread->thread_info = info;
1013 thread->small_id = info->small_id;
1015 current_thread = new_thread_with_internal (domain, thread);
1017 if (!handle_store (current_thread, force_attach)) {
1018 /* Mono is shutting down, so just wait for the end */
1020 mono_thread_info_sleep (10000, NULL);
1023 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1025 SET_CURRENT_OBJECT (thread);
1026 mono_domain_set (domain, TRUE);
1028 thread_adjust_static_data (thread);
1030 init_root_domain_thread (thread, current_thread);
1032 if (domain != mono_get_root_domain ())
1033 set_current_thread_for_domain (domain, thread, current_thread);
1036 if (mono_thread_attach_cb) {
1040 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1043 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1045 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1048 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1049 if (!info->tools_thread)
1050 // FIXME: Need a separate callback
1051 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1053 return current_thread;
1057 mono_thread_detach_internal (MonoInternalThread *thread)
1059 g_return_if_fail (thread != NULL);
1061 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1063 thread_cleanup (thread);
1065 SET_CURRENT_OBJECT (NULL);
1066 mono_domain_unset ();
1068 /* Don't need to CloseHandle this thread, even though we took a
1069 * reference in mono_thread_attach (), because the GC will do it
1070 * when the Thread object is finalised.
1075 mono_thread_detach (MonoThread *thread)
1078 mono_thread_detach_internal (thread->internal_thread);
1082 * mono_thread_detach_if_exiting:
1084 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1085 * This should be used at the end of embedding code which calls into managed code, and which
1086 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1089 mono_thread_detach_if_exiting (void)
1091 if (mono_thread_info_is_exiting ()) {
1092 MonoInternalThread *thread;
1094 thread = mono_thread_internal_current ();
1096 mono_thread_detach_internal (thread);
1097 mono_thread_info_detach ();
1107 MonoInternalThread *thread = mono_thread_internal_current ();
1109 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1111 thread_cleanup (thread);
1112 SET_CURRENT_OBJECT (NULL);
1113 mono_domain_unset ();
1115 /* we could add a callback here for embedders to use. */
1116 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1117 exit (mono_environment_exitcode_get ());
1118 mono_thread_info_exit ();
1122 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1124 MonoInternalThread *internal;
1126 internal = create_internal_thread ();
1128 internal->state = ThreadState_Unstarted;
1130 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1134 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1138 StartInfo *start_info;
1139 MonoInternalThread *internal;
1142 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1144 if (!this_obj->internal_thread)
1145 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1146 internal = this_obj->internal_thread;
1148 LOCK_THREAD (internal);
1150 if ((internal->state & ThreadState_Unstarted) == 0) {
1151 UNLOCK_THREAD (internal);
1152 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1156 if ((internal->state & ThreadState_Aborted) != 0) {
1157 UNLOCK_THREAD (internal);
1160 /* This is freed in start_wrapper */
1161 start_info = g_new0 (StartInfo, 1);
1162 start_info->func = NULL;
1163 start_info->start_arg = NULL;
1164 start_info->delegate = start;
1165 start_info->obj = this_obj;
1166 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1168 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1170 mono_error_cleanup (&error);
1171 UNLOCK_THREAD (internal);
1175 internal->state &= ~ThreadState_Unstarted;
1177 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1179 UNLOCK_THREAD (internal);
1180 return internal->handle;
1184 * This is called from the finalizer of the internal thread object.
1187 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1189 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1192 * Since threads keep a reference to their thread object while running, by the time this function is called,
1193 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1194 * when thread_cleanup () can be called after this.
1197 CloseHandle (thread);
1199 if (this_obj->synch_cs) {
1200 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1201 this_obj->synch_cs = NULL;
1202 mono_coop_mutex_destroy (synch_cs);
1206 if (this_obj->name) {
1207 void *name = this_obj->name;
1208 this_obj->name = NULL;
1214 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1217 MonoInternalThread *thread = mono_thread_internal_current ();
1219 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1221 if (mono_thread_current_check_pending_interrupt ())
1225 gboolean alerted = FALSE;
1227 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1229 res = mono_thread_info_sleep (ms, &alerted);
1231 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1234 MonoException* exc = mono_thread_execute_interruption ();
1236 mono_raise_exception (exc);
1248 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1253 ves_icall_System_Threading_Thread_GetDomainID (void)
1255 return mono_domain_get()->domain_id;
1259 ves_icall_System_Threading_Thread_Yield (void)
1261 return mono_thread_info_yield ();
1265 * mono_thread_get_name:
1267 * Return the name of the thread. NAME_LEN is set to the length of the name.
1268 * Return NULL if the thread has no name. The returned memory is owned by the
1272 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1276 LOCK_THREAD (this_obj);
1278 if (!this_obj->name) {
1282 *name_len = this_obj->name_len;
1283 res = g_new (gunichar2, this_obj->name_len);
1284 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1287 UNLOCK_THREAD (this_obj);
1293 * mono_thread_get_name_utf8:
1295 * Return the name of the thread in UTF-8.
1296 * Return NULL if the thread has no name.
1297 * The returned memory is owned by the caller.
1300 mono_thread_get_name_utf8 (MonoThread *thread)
1305 MonoInternalThread *internal = thread->internal_thread;
1306 if (internal == NULL)
1309 LOCK_THREAD (internal);
1311 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1313 UNLOCK_THREAD (internal);
1319 * mono_thread_get_managed_id:
1321 * Return the Thread.ManagedThreadId value of `thread`.
1322 * Returns -1 if `thread` is NULL.
1325 mono_thread_get_managed_id (MonoThread *thread)
1330 MonoInternalThread *internal = thread->internal_thread;
1331 if (internal == NULL)
1334 int32_t id = internal->managed_id;
1340 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1345 mono_error_init (&error);
1347 LOCK_THREAD (this_obj);
1349 if (!this_obj->name)
1352 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1354 UNLOCK_THREAD (this_obj);
1356 if (mono_error_set_pending_exception (&error))
1363 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1365 LOCK_THREAD (this_obj);
1367 mono_error_init (error);
1369 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1370 UNLOCK_THREAD (this_obj);
1372 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1375 if (this_obj->name) {
1376 g_free (this_obj->name);
1377 this_obj->name_len = 0;
1380 this_obj->name = g_new (gunichar2, mono_string_length (name));
1381 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1382 this_obj->name_len = mono_string_length (name);
1385 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1388 this_obj->name = NULL;
1391 UNLOCK_THREAD (this_obj);
1393 if (this_obj->name && this_obj->tid) {
1394 char *tname = mono_string_to_utf8_checked (name, error);
1395 return_if_nok (error);
1396 mono_profiler_thread_name (this_obj->tid, tname);
1397 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1403 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1406 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1407 mono_error_set_pending_exception (&error);
1411 * ves_icall_System_Threading_Thread_GetPriority_internal:
1412 * @param this_obj: The MonoInternalThread on which to operate.
1414 * Gets the priority of the given thread.
1415 * @return: The priority of the given thread.
1418 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1421 MonoInternalThread *internal = this_obj->internal_thread;
1423 LOCK_THREAD (internal);
1424 if (internal->handle != NULL)
1425 priority = GetThreadPriority (internal->handle) + 2;
1427 priority = this_obj->priority + 2;
1428 UNLOCK_THREAD (internal);
1433 * ves_icall_System_Threading_Thread_SetPriority_internal:
1434 * @param this_obj: The MonoInternalThread on which to operate.
1435 * @param priority: The priority to set.
1437 * Sets the priority of the given thread.
1440 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1442 MonoInternalThread *internal = this_obj->internal_thread;
1444 LOCK_THREAD (internal);
1445 this_obj->priority = priority - 2;
1446 if (internal->handle != NULL)
1447 SetThreadPriority (internal->handle, this_obj->priority);
1448 UNLOCK_THREAD (internal);
1451 /* If the array is already in the requested domain, we just return it,
1452 otherwise we return a copy in that domain. */
1454 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1458 mono_error_init (error);
1462 if (mono_object_domain (arr) == domain)
1465 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1466 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1471 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1474 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1475 mono_error_set_pending_exception (&error);
1480 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1483 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1484 mono_error_set_pending_exception (&error);
1489 mono_thread_current (void)
1491 MonoDomain *domain = mono_domain_get ();
1492 MonoInternalThread *internal = mono_thread_internal_current ();
1493 MonoThread **current_thread_ptr;
1495 g_assert (internal);
1496 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1498 if (!*current_thread_ptr) {
1499 g_assert (domain != mono_get_root_domain ());
1500 *current_thread_ptr = new_thread_with_internal (domain, internal);
1502 return *current_thread_ptr;
1505 /* Return the thread object belonging to INTERNAL in the current domain */
1507 mono_thread_current_for_thread (MonoInternalThread *internal)
1509 MonoDomain *domain = mono_domain_get ();
1510 MonoThread **current_thread_ptr;
1512 g_assert (internal);
1513 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1515 if (!*current_thread_ptr) {
1516 g_assert (domain != mono_get_root_domain ());
1517 *current_thread_ptr = new_thread_with_internal (domain, internal);
1519 return *current_thread_ptr;
1523 mono_thread_internal_current (void)
1525 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1526 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1531 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1533 MonoInternalThread *thread = this_obj->internal_thread;
1534 HANDLE handle = thread->handle;
1535 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1538 if (mono_thread_current_check_pending_interrupt ())
1541 LOCK_THREAD (thread);
1543 if ((thread->state & ThreadState_Unstarted) != 0) {
1544 UNLOCK_THREAD (thread);
1546 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1550 UNLOCK_THREAD (thread);
1555 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1557 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1560 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1563 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1565 if(ret==WAIT_OBJECT_0) {
1566 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1571 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1576 #define MANAGED_WAIT_FAILED 0x7fffffff
1579 map_native_wait_result_to_managed (gint32 val)
1581 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1582 return val == WAIT_FAILED ? MANAGED_WAIT_FAILED : val;
1586 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1594 mono_error_init (error);
1596 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1599 if (numhandles != 1)
1600 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE);
1602 ret = WaitForSingleObjectEx (handles [0], ms, TRUE);
1605 if (ret != WAIT_IO_COMPLETION)
1608 exc = mono_thread_execute_interruption ();
1610 mono_error_set_exception_instance (error, exc);
1617 /* Re-calculate ms according to the time passed */
1618 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1619 if (diff_ms >= ms) {
1623 wait = ms - diff_ms;
1629 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1636 MonoObject *waitHandle;
1637 MonoInternalThread *thread = mono_thread_internal_current ();
1639 /* Do this WaitSleepJoin check before creating objects */
1640 if (mono_thread_current_check_pending_interrupt ())
1641 return map_native_wait_result_to_managed (WAIT_FAILED);
1643 /* We fail in managed if the array has more than 64 elements */
1644 numhandles = (guint32)mono_array_length(mono_handles);
1645 handles = g_new0(HANDLE, numhandles);
1647 for(i = 0; i < numhandles; i++) {
1648 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1649 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1656 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1658 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1660 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1664 mono_error_set_pending_exception (&error);
1666 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1667 return map_native_wait_result_to_managed (ret);
1670 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1673 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1674 uintptr_t numhandles;
1677 MonoObject *waitHandle;
1678 MonoInternalThread *thread = mono_thread_internal_current ();
1680 /* Do this WaitSleepJoin check before creating objects */
1681 if (mono_thread_current_check_pending_interrupt ())
1682 return map_native_wait_result_to_managed (WAIT_FAILED);
1684 numhandles = mono_array_length(mono_handles);
1685 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1686 return map_native_wait_result_to_managed (WAIT_FAILED);
1688 for(i = 0; i < numhandles; i++) {
1689 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1690 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1697 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1699 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1701 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1703 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1705 mono_error_set_pending_exception (&error);
1707 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1709 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1710 return map_native_wait_result_to_managed (ret - WAIT_OBJECT_0);
1712 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1713 return map_native_wait_result_to_managed (ret - WAIT_ABANDONED_0);
1716 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1717 return map_native_wait_result_to_managed (ret);
1721 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1725 MonoInternalThread *thread = mono_thread_internal_current ();
1727 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1733 if (mono_thread_current_check_pending_interrupt ())
1734 return map_native_wait_result_to_managed (WAIT_FAILED);
1736 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1738 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1740 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1742 mono_error_set_pending_exception (&error);
1743 return map_native_wait_result_to_managed (ret);
1747 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1750 MonoInternalThread *thread = mono_thread_internal_current ();
1755 if (mono_thread_current_check_pending_interrupt ())
1756 return map_native_wait_result_to_managed (WAIT_FAILED);
1758 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1761 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1764 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1766 return map_native_wait_result_to_managed (ret);
1769 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1776 mutex = CreateMutex (NULL, owned, NULL);
1778 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1780 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1788 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1789 return(ReleaseMutex (handle));
1792 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1798 *error = ERROR_SUCCESS;
1800 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1802 *error = GetLastError ();
1809 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, gint32 *error)
1814 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1816 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1817 mono_string_chars (name));
1820 *error = GetLastError ();
1824 MonoBoolean ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, gint32 *prevcount)
1826 return ReleaseSemaphore (handle, releaseCount, prevcount);
1829 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1833 sem = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1834 *error = GetLastError ();
1839 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1846 event = CreateEvent (NULL, manual, initial, NULL);
1848 event = CreateEvent (NULL, manual, initial,
1849 mono_string_chars (name));
1851 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1859 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1860 return (SetEvent(handle));
1863 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1864 return (ResetEvent(handle));
1868 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1869 CloseHandle (handle);
1872 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1878 *error = ERROR_SUCCESS;
1880 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1882 *error = GetLastError ();
1888 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1890 return InterlockedIncrement (location);
1893 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1895 #if SIZEOF_VOID_P == 4
1896 if (G_UNLIKELY ((size_t)location & 0x7)) {
1898 mono_interlocked_lock ();
1901 mono_interlocked_unlock ();
1905 return InterlockedIncrement64 (location);
1908 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1910 return InterlockedDecrement(location);
1913 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1915 #if SIZEOF_VOID_P == 4
1916 if (G_UNLIKELY ((size_t)location & 0x7)) {
1918 mono_interlocked_lock ();
1921 mono_interlocked_unlock ();
1925 return InterlockedDecrement64 (location);
1928 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1930 return InterlockedExchange(location, value);
1933 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1936 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1937 mono_gc_wbarrier_generic_nostore (location);
1941 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1943 return InterlockedExchangePointer(location, value);
1946 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1948 IntFloatUnion val, ret;
1951 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1957 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1959 #if SIZEOF_VOID_P == 4
1960 if (G_UNLIKELY ((size_t)location & 0x7)) {
1962 mono_interlocked_lock ();
1965 mono_interlocked_unlock ();
1969 return InterlockedExchange64 (location, value);
1973 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1975 LongDoubleUnion val, ret;
1978 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1983 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1985 return InterlockedCompareExchange(location, value, comparand);
1988 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1990 gint32 r = InterlockedCompareExchange(location, value, comparand);
1991 *success = r == comparand;
1995 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1998 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1999 mono_gc_wbarrier_generic_nostore (location);
2003 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2005 return InterlockedCompareExchangePointer(location, value, comparand);
2008 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2010 IntFloatUnion val, ret, cmp;
2013 cmp.fval = comparand;
2014 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2020 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2022 #if SIZEOF_VOID_P == 8
2023 LongDoubleUnion val, comp, ret;
2026 comp.fval = comparand;
2027 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2033 mono_interlocked_lock ();
2035 if (old == comparand)
2037 mono_interlocked_unlock ();
2044 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2046 #if SIZEOF_VOID_P == 4
2047 if (G_UNLIKELY ((size_t)location & 0x7)) {
2049 mono_interlocked_lock ();
2051 if (old == comparand)
2053 mono_interlocked_unlock ();
2057 return InterlockedCompareExchange64 (location, value, comparand);
2061 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2064 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2065 mono_gc_wbarrier_generic_nostore (location);
2070 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2073 MONO_CHECK_NULL (location, NULL);
2074 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2075 mono_gc_wbarrier_generic_nostore (location);
2080 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2082 return InterlockedAdd (location, value);
2086 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2088 #if SIZEOF_VOID_P == 4
2089 if (G_UNLIKELY ((size_t)location & 0x7)) {
2091 mono_interlocked_lock ();
2094 mono_interlocked_unlock ();
2098 return InterlockedAdd64 (location, value);
2102 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2104 #if SIZEOF_VOID_P == 4
2105 if (G_UNLIKELY ((size_t)location & 0x7)) {
2107 mono_interlocked_lock ();
2109 mono_interlocked_unlock ();
2113 return InterlockedRead64 (location);
2117 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2119 mono_memory_barrier ();
2123 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2125 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2127 if (state & ThreadState_Background) {
2128 /* If the thread changes the background mode, the main thread has to
2129 * be notified, since it has to rebuild the list of threads to
2132 SetEvent (background_change_event);
2137 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2139 mono_thread_set_state (this_obj, (MonoThreadState)state);
2141 if (state & ThreadState_Background) {
2142 /* If the thread changes the background mode, the main thread has to
2143 * be notified, since it has to rebuild the list of threads to
2146 SetEvent (background_change_event);
2151 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2155 LOCK_THREAD (this_obj);
2157 state = this_obj->state;
2159 UNLOCK_THREAD (this_obj);
2164 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2166 MonoInternalThread *current;
2168 MonoInternalThread *thread = this_obj->internal_thread;
2170 LOCK_THREAD (thread);
2172 current = mono_thread_internal_current ();
2174 thread->thread_interrupt_requested = TRUE;
2175 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2177 UNLOCK_THREAD (thread);
2180 async_abort_internal (thread, FALSE);
2185 * mono_thread_current_check_pending_interrupt:
2187 * Checks if there's a interruption request and set the pending exception if so.
2189 * @returns true if a pending exception was set
2192 mono_thread_current_check_pending_interrupt (void)
2194 MonoInternalThread *thread = mono_thread_internal_current ();
2195 gboolean throw_ = FALSE;
2197 LOCK_THREAD (thread);
2199 if (thread->thread_interrupt_requested) {
2201 thread->thread_interrupt_requested = FALSE;
2204 UNLOCK_THREAD (thread);
2207 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2212 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2214 LOCK_THREAD (thread);
2216 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2217 (thread->state & ThreadState_StopRequested) != 0 ||
2218 (thread->state & ThreadState_Stopped) != 0)
2220 UNLOCK_THREAD (thread);
2224 if ((thread->state & ThreadState_Unstarted) != 0) {
2225 thread->state |= ThreadState_Aborted;
2226 UNLOCK_THREAD (thread);
2230 thread->state |= ThreadState_AbortRequested;
2231 if (thread->abort_state_handle)
2232 mono_gchandle_free (thread->abort_state_handle);
2234 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2235 g_assert (thread->abort_state_handle);
2237 thread->abort_state_handle = 0;
2239 thread->abort_exc = NULL;
2241 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));
2243 /* During shutdown, we can't wait for other threads */
2245 /* Make sure the thread is awake */
2246 mono_thread_resume (thread);
2248 UNLOCK_THREAD (thread);
2253 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2255 if (!request_thread_abort (thread, state))
2258 if (thread == mono_thread_internal_current ()) {
2260 self_abort_internal (&error);
2261 mono_error_set_pending_exception (&error);
2263 async_abort_internal (thread, TRUE);
2268 * mono_thread_internal_abort:
2270 * Request thread @thread to be aborted.
2272 * @thread MUST NOT be the current thread.
2275 mono_thread_internal_abort (MonoInternalThread *thread)
2277 g_assert (thread != mono_thread_internal_current ());
2279 if (!request_thread_abort (thread, NULL))
2281 async_abort_internal (thread, TRUE);
2285 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2287 MonoInternalThread *thread = mono_thread_internal_current ();
2288 gboolean was_aborting;
2290 LOCK_THREAD (thread);
2291 was_aborting = thread->state & ThreadState_AbortRequested;
2292 thread->state &= ~ThreadState_AbortRequested;
2293 UNLOCK_THREAD (thread);
2295 if (!was_aborting) {
2296 const char *msg = "Unable to reset abort because no abort was requested";
2297 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2300 thread->abort_exc = NULL;
2301 if (thread->abort_state_handle) {
2302 mono_gchandle_free (thread->abort_state_handle);
2303 /* This is actually not necessary - the handle
2304 only counts if the exception is set */
2305 thread->abort_state_handle = 0;
2310 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2312 LOCK_THREAD (thread);
2314 thread->state &= ~ThreadState_AbortRequested;
2316 if (thread->abort_exc) {
2317 thread->abort_exc = NULL;
2318 if (thread->abort_state_handle) {
2319 mono_gchandle_free (thread->abort_state_handle);
2320 /* This is actually not necessary - the handle
2321 only counts if the exception is set */
2322 thread->abort_state_handle = 0;
2326 UNLOCK_THREAD (thread);
2330 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2333 MonoInternalThread *thread = this_obj->internal_thread;
2334 MonoObject *state, *deserialized = NULL;
2337 if (!thread->abort_state_handle)
2340 state = mono_gchandle_get_target (thread->abort_state_handle);
2343 domain = mono_domain_get ();
2344 if (mono_object_domain (state) == domain)
2347 deserialized = mono_object_xdomain_representation (state, domain, &error);
2349 if (!deserialized) {
2350 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2351 if (!is_ok (&error)) {
2352 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2353 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2355 mono_set_pending_exception (invalid_op_exc);
2359 return deserialized;
2363 mono_thread_suspend (MonoInternalThread *thread)
2365 LOCK_THREAD (thread);
2367 if ((thread->state & ThreadState_Unstarted) != 0 ||
2368 (thread->state & ThreadState_Aborted) != 0 ||
2369 (thread->state & ThreadState_Stopped) != 0)
2371 UNLOCK_THREAD (thread);
2375 if ((thread->state & ThreadState_Suspended) != 0 ||
2376 (thread->state & ThreadState_SuspendRequested) != 0 ||
2377 (thread->state & ThreadState_StopRequested) != 0)
2379 UNLOCK_THREAD (thread);
2383 thread->state |= ThreadState_SuspendRequested;
2385 if (thread == mono_thread_internal_current ()) {
2386 /* calls UNLOCK_THREAD (thread) */
2387 self_suspend_internal ();
2389 /* calls UNLOCK_THREAD (thread) */
2390 async_suspend_internal (thread, FALSE);
2397 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2399 if (!mono_thread_suspend (this_obj->internal_thread)) {
2400 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2405 /* LOCKING: LOCK_THREAD(thread) must be held */
2407 mono_thread_resume (MonoInternalThread *thread)
2409 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2410 thread->state &= ~ThreadState_SuspendRequested;
2414 if ((thread->state & ThreadState_Suspended) == 0 ||
2415 (thread->state & ThreadState_Unstarted) != 0 ||
2416 (thread->state & ThreadState_Aborted) != 0 ||
2417 (thread->state & ThreadState_Stopped) != 0)
2422 UNLOCK_THREAD (thread);
2424 /* Awake the thread */
2425 if (!mono_thread_info_resume (thread_get_tid (thread)))
2428 LOCK_THREAD (thread);
2430 thread->state &= ~ThreadState_Suspended;
2436 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2438 if (!thread->internal_thread) {
2439 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2441 LOCK_THREAD (thread->internal_thread);
2442 if (!mono_thread_resume (thread->internal_thread))
2443 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2444 UNLOCK_THREAD (thread->internal_thread);
2449 mono_threads_is_critical_method (MonoMethod *method)
2451 switch (method->wrapper_type) {
2452 case MONO_WRAPPER_RUNTIME_INVOKE:
2453 case MONO_WRAPPER_XDOMAIN_INVOKE:
2454 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2461 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2466 if (mono_threads_is_critical_method (m)) {
2467 *((gboolean*)data) = TRUE;
2474 is_running_protected_wrapper (void)
2476 gboolean found = FALSE;
2477 mono_stack_walk (find_wrapper, &found);
2482 request_thread_stop (MonoInternalThread *thread)
2484 LOCK_THREAD (thread);
2486 if ((thread->state & ThreadState_StopRequested) != 0 ||
2487 (thread->state & ThreadState_Stopped) != 0)
2489 UNLOCK_THREAD (thread);
2493 /* Make sure the thread is awake */
2494 mono_thread_resume (thread);
2496 thread->state |= ThreadState_StopRequested;
2497 thread->state &= ~ThreadState_AbortRequested;
2499 UNLOCK_THREAD (thread);
2504 * mono_thread_internal_stop:
2506 * Request thread @thread to stop.
2508 * @thread MUST NOT be the current thread.
2511 mono_thread_internal_stop (MonoInternalThread *thread)
2513 g_assert (thread != mono_thread_internal_current ());
2515 if (!request_thread_stop (thread))
2518 async_abort_internal (thread, TRUE);
2521 void mono_thread_stop (MonoThread *thread)
2523 MonoInternalThread *internal = thread->internal_thread;
2525 if (!request_thread_stop (internal))
2528 if (internal == mono_thread_internal_current ()) {
2530 self_abort_internal (&error);
2532 This function is part of the embeding API and has no way to return the exception
2533 to be thrown. So what we do is keep the old behavior and raise the exception.
2535 mono_error_raise_exception (&error); /* OK to throw, see note */
2537 async_abort_internal (internal, TRUE);
2542 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2544 gint8 tmp = *(volatile gint8 *)ptr;
2545 mono_memory_barrier ();
2550 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2552 gint16 tmp = *(volatile gint16 *)ptr;
2553 mono_memory_barrier ();
2558 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2560 gint32 tmp = *(volatile gint32 *)ptr;
2561 mono_memory_barrier ();
2566 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2568 gint64 tmp = *(volatile gint64 *)ptr;
2569 mono_memory_barrier ();
2574 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2576 volatile void *tmp = *(volatile void **)ptr;
2577 mono_memory_barrier ();
2578 return (void *) tmp;
2582 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2584 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2585 mono_memory_barrier ();
2586 return (MonoObject *) tmp;
2590 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2592 double tmp = *(volatile double *)ptr;
2593 mono_memory_barrier ();
2598 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2600 float tmp = *(volatile float *)ptr;
2601 mono_memory_barrier ();
2606 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2608 return InterlockedRead8 ((volatile gint8 *)ptr);
2612 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2614 return InterlockedRead16 ((volatile gint16 *)ptr);
2618 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2620 return InterlockedRead ((volatile gint32 *)ptr);
2624 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2626 #if SIZEOF_VOID_P == 4
2627 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2629 mono_interlocked_lock ();
2630 val = *(gint64*)ptr;
2631 mono_interlocked_unlock ();
2635 return InterlockedRead64 ((volatile gint64 *)ptr);
2639 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2641 return InterlockedReadPointer ((volatile gpointer *)ptr);
2645 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2649 #if SIZEOF_VOID_P == 4
2650 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2652 mono_interlocked_lock ();
2653 val = *(double*)ptr;
2654 mono_interlocked_unlock ();
2659 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2665 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2669 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2675 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2677 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2681 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2683 mono_memory_barrier ();
2684 *(volatile gint8 *)ptr = value;
2688 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2690 mono_memory_barrier ();
2691 *(volatile gint16 *)ptr = value;
2695 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2697 mono_memory_barrier ();
2698 *(volatile gint32 *)ptr = value;
2702 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2704 mono_memory_barrier ();
2705 *(volatile gint64 *)ptr = value;
2709 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2711 mono_memory_barrier ();
2712 *(volatile void **)ptr = value;
2716 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2718 mono_memory_barrier ();
2719 mono_gc_wbarrier_generic_store (ptr, value);
2723 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2725 mono_memory_barrier ();
2726 *(volatile double *)ptr = value;
2730 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2732 mono_memory_barrier ();
2733 *(volatile float *)ptr = value;
2737 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2739 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2743 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2745 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2749 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2751 InterlockedWrite ((volatile gint32 *)ptr, value);
2755 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2757 #if SIZEOF_VOID_P == 4
2758 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2759 mono_interlocked_lock ();
2760 *(gint64*)ptr = value;
2761 mono_interlocked_unlock ();
2766 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2770 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2772 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2776 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2780 #if SIZEOF_VOID_P == 4
2781 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2782 mono_interlocked_lock ();
2783 *(double*)ptr = value;
2784 mono_interlocked_unlock ();
2791 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2795 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2801 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2805 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2807 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2811 free_context (void *user_data)
2813 ContextStaticData *data = user_data;
2815 mono_threads_lock ();
2818 * There is no guarantee that, by the point this reference queue callback
2819 * has been invoked, the GC handle associated with the object will fail to
2820 * resolve as one might expect. So if we don't free and remove the GC
2821 * handle here, free_context_static_data_helper () could end up resolving
2822 * a GC handle to an actually-dead context which would contain a pointer
2823 * to an already-freed static data segment, resulting in a crash when
2826 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2828 mono_threads_unlock ();
2830 mono_gchandle_free (data->gc_handle);
2831 mono_free_static_data (data->static_data);
2836 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2838 mono_threads_lock ();
2840 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2843 contexts = g_hash_table_new (NULL, NULL);
2846 context_queue = mono_gc_reference_queue_new (free_context);
2848 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2849 g_hash_table_insert (contexts, gch, gch);
2852 * We use this intermediate structure to contain a duplicate pointer to
2853 * the static data because we can't rely on being able to resolve the GC
2854 * handle in the reference queue callback.
2856 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2857 data->gc_handle = GPOINTER_TO_UINT (gch);
2860 context_adjust_static_data (ctx);
2861 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2863 mono_threads_unlock ();
2865 mono_profiler_context_loaded (ctx);
2869 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2872 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2873 * cleanup in exceptional circumstances, we don't actually do any
2874 * cleanup work here. We instead do this via a reference queue.
2877 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2879 mono_profiler_context_unloaded (ctx);
2883 mono_thread_init_tls (void)
2885 MONO_FAST_TLS_INIT (tls_current_object);
2886 mono_native_tls_alloc (¤t_object_key, NULL);
2889 void mono_thread_init (MonoThreadStartCB start_cb,
2890 MonoThreadAttachCB attach_cb)
2892 mono_coop_mutex_init_recursive (&threads_mutex);
2894 mono_os_mutex_init_recursive(&interlocked_mutex);
2895 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2897 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2898 g_assert(background_change_event != NULL);
2900 mono_init_static_data_info (&thread_static_info);
2901 mono_init_static_data_info (&context_static_info);
2903 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2905 mono_thread_start_cb = start_cb;
2906 mono_thread_attach_cb = attach_cb;
2908 /* Get a pseudo handle to the current process. This is just a
2909 * kludge so that wapi can build a process handle if needed.
2910 * As a pseudo handle is returned, we don't need to clean
2913 GetCurrentProcess ();
2916 void mono_thread_cleanup (void)
2918 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2919 MonoThreadInfo *info;
2921 /* The main thread must abandon any held mutexes (particularly
2922 * important for named mutexes as they are shared across
2923 * processes, see bug 74680.) This will happen when the
2924 * thread exits, but if it's not running in a subthread it
2925 * won't exit in time.
2927 info = mono_thread_info_current ();
2928 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2932 /* This stuff needs more testing, it seems one of these
2933 * critical sections can be locked when mono_thread_cleanup is
2936 mono_coop_mutex_destroy (&threads_mutex);
2937 mono_os_mutex_destroy (&interlocked_mutex);
2938 mono_os_mutex_destroy (&delayed_free_table_mutex);
2939 mono_os_mutex_destroy (&small_id_mutex);
2940 CloseHandle (background_change_event);
2943 mono_native_tls_free (current_object_key);
2947 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2949 mono_thread_cleanup_fn = func;
2953 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2955 thread->internal_thread->manage_callback = func;
2959 static void print_tids (gpointer key, gpointer value, gpointer user)
2961 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2962 * sizeof(uint) and a cast to uint would overflow
2964 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2965 * print this as a pointer.
2967 g_message ("Waiting for: %p", key);
2972 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2973 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2977 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2981 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2984 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2987 if(ret==WAIT_FAILED) {
2988 /* See the comment in build_wait_tids() */
2989 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2993 for(i=0; i<wait->num; i++)
2994 CloseHandle (wait->handles[i]);
2996 if (ret == WAIT_TIMEOUT)
2999 for(i=0; i<wait->num; i++) {
3000 gsize tid = wait->threads[i]->tid;
3003 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
3004 * it can still run io-layer etc. code. So wait for it to really exit.
3005 * FIXME: This won't join threads which are not in the joinable_hash yet.
3007 mono_thread_join ((gpointer)tid);
3009 mono_threads_lock ();
3010 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3011 /* This thread must have been killed, because
3012 * it hasn't cleaned itself up. (It's just
3013 * possible that the thread exited before the
3014 * parent thread had a chance to store the
3015 * handle, and now there is another pointer to
3016 * the already-exited thread stored. In this
3017 * case, we'll just get two
3018 * mono_profiler_thread_end() calls for the
3022 mono_threads_unlock ();
3023 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
3024 thread_cleanup (wait->threads[i]);
3026 mono_threads_unlock ();
3031 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
3033 guint32 i, ret, count;
3035 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3037 /* Add the thread state change event, so it wakes up if a thread changes
3038 * to background mode.
3041 if (count < MAXIMUM_WAIT_OBJECTS) {
3042 wait->handles [count] = background_change_event;
3047 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
3050 if(ret==WAIT_FAILED) {
3051 /* See the comment in build_wait_tids() */
3052 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3056 for(i=0; i<wait->num; i++)
3057 CloseHandle (wait->handles[i]);
3059 if (ret == WAIT_TIMEOUT)
3062 if (ret < wait->num) {
3063 gsize tid = wait->threads[ret]->tid;
3064 mono_threads_lock ();
3065 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3066 /* See comment in wait_for_tids about thread cleanup */
3067 mono_threads_unlock ();
3068 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
3069 thread_cleanup (wait->threads [ret]);
3071 mono_threads_unlock ();
3075 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3077 struct wait_data *wait=(struct wait_data *)user;
3079 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
3081 MonoInternalThread *thread=(MonoInternalThread *)value;
3083 /* Ignore background threads, we abort them later */
3084 /* Do not lock here since it is not needed and the caller holds threads_lock */
3085 if (thread->state & ThreadState_Background) {
3086 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3087 return; /* just leave, ignore */
3090 if (mono_gc_is_finalizer_internal_thread (thread)) {
3091 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3095 if (thread == mono_thread_internal_current ()) {
3096 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3100 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3101 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3105 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3106 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3110 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3111 if (handle == NULL) {
3112 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3116 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3117 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3118 wait->handles[wait->num]=handle;
3119 wait->threads[wait->num]=thread;
3122 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3124 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3129 /* Just ignore the rest, we can't do anything with
3136 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3138 struct wait_data *wait=(struct wait_data *)user;
3139 MonoNativeThreadId self = mono_native_thread_id_get ();
3140 MonoInternalThread *thread = (MonoInternalThread *)value;
3143 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3146 /* The finalizer thread is not a background thread */
3147 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3148 && (thread->state & ThreadState_Background) != 0
3149 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3151 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3155 wait->handles[wait->num] = handle;
3156 wait->threads[wait->num] = thread;
3159 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3160 mono_thread_internal_stop (thread);
3164 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3165 && !mono_gc_is_finalizer_internal_thread (thread);
3169 * mono_threads_set_shutting_down:
3171 * Is called by a thread that wants to shut down Mono. If the runtime is already
3172 * shutting down, the calling thread is suspended/stopped, and this function never
3176 mono_threads_set_shutting_down (void)
3178 MonoInternalThread *current_thread = mono_thread_internal_current ();
3180 mono_threads_lock ();
3182 if (shutting_down) {
3183 mono_threads_unlock ();
3185 /* Make sure we're properly suspended/stopped */
3187 LOCK_THREAD (current_thread);
3189 if ((current_thread->state & ThreadState_SuspendRequested) ||
3190 (current_thread->state & ThreadState_AbortRequested) ||
3191 (current_thread->state & ThreadState_StopRequested)) {
3192 UNLOCK_THREAD (current_thread);
3193 mono_thread_execute_interruption ();
3195 current_thread->state |= ThreadState_Stopped;
3196 UNLOCK_THREAD (current_thread);
3199 /*since we're killing the thread, unset the current domain.*/
3200 mono_domain_unset ();
3202 /* Wake up other threads potentially waiting for us */
3203 mono_thread_info_exit ();
3205 shutting_down = TRUE;
3207 /* Not really a background state change, but this will
3208 * interrupt the main thread if it is waiting for all
3209 * the other threads.
3211 SetEvent (background_change_event);
3213 mono_threads_unlock ();
3217 void mono_thread_manage (void)
3219 struct wait_data wait_data;
3220 struct wait_data *wait = &wait_data;
3222 memset (wait, 0, sizeof (struct wait_data));
3223 /* join each thread that's still running */
3224 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3226 mono_threads_lock ();
3228 THREAD_DEBUG (g_message("%s: No threads", __func__));
3229 mono_threads_unlock ();
3232 mono_threads_unlock ();
3235 mono_threads_lock ();
3236 if (shutting_down) {
3237 /* somebody else is shutting down */
3238 mono_threads_unlock ();
3241 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3242 mono_g_hash_table_foreach (threads, print_tids, NULL));
3244 ResetEvent (background_change_event);
3246 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3247 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3248 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3249 mono_threads_unlock ();
3251 /* Something to wait for */
3252 wait_for_tids_or_state_change (wait, INFINITE);
3254 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3255 } while(wait->num>0);
3257 /* Mono is shutting down, so just wait for the end */
3258 if (!mono_runtime_try_shutdown ()) {
3259 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3260 mono_thread_suspend (mono_thread_internal_current ());
3261 mono_thread_execute_interruption ();
3265 * Remove everything but the finalizer thread and self.
3266 * Also abort all the background threads
3269 mono_threads_lock ();
3272 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3273 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3274 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3276 mono_threads_unlock ();
3278 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3280 /* Something to wait for */
3281 wait_for_tids (wait, INFINITE);
3283 } while (wait->num > 0);
3286 * give the subthreads a chance to really quit (this is mainly needed
3287 * to get correct user and system times from getrusage/wait/time(1)).
3288 * This could be removed if we avoid pthread_detach() and use pthread_join().
3290 mono_thread_info_yield ();
3294 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3296 MonoInternalThread *thread = (MonoInternalThread*)value;
3297 struct wait_data *wait = (struct wait_data*)user_data;
3301 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3303 * This needs no locking.
3305 if ((thread->state & ThreadState_Suspended) != 0 ||
3306 (thread->state & ThreadState_Stopped) != 0)
3309 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3310 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3314 wait->handles [wait->num] = handle;
3315 wait->threads [wait->num] = thread;
3321 * mono_thread_suspend_all_other_threads:
3323 * Suspend all managed threads except the finalizer thread and this thread. It is
3324 * not possible to resume them later.
3326 void mono_thread_suspend_all_other_threads (void)
3328 struct wait_data wait_data;
3329 struct wait_data *wait = &wait_data;
3331 MonoNativeThreadId self = mono_native_thread_id_get ();
3332 guint32 eventidx = 0;
3333 gboolean starting, finished;
3335 memset (wait, 0, sizeof (struct wait_data));
3337 * The other threads could be in an arbitrary state at this point, i.e.
3338 * they could be starting up, shutting down etc. This means that there could be
3339 * threads which are not even in the threads hash table yet.
3343 * First we set a barrier which will be checked by all threads before they
3344 * are added to the threads hash table, and they will exit if the flag is set.
3345 * This ensures that no threads could be added to the hash later.
3346 * We will use shutting_down as the barrier for now.
3348 g_assert (shutting_down);
3351 * We make multiple calls to WaitForMultipleObjects since:
3352 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3353 * - some threads could exit without becoming suspended
3358 * Make a copy of the hashtable since we can't do anything with
3359 * threads while threads_mutex is held.
3362 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3363 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3364 mono_threads_lock ();
3365 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3366 mono_threads_unlock ();
3369 /* Get the suspended events that we'll be waiting for */
3370 for (i = 0; i < wait->num; ++i) {
3371 MonoInternalThread *thread = wait->threads [i];
3373 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3374 || mono_gc_is_finalizer_internal_thread (thread)
3375 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3377 //CloseHandle (wait->handles [i]);
3378 wait->threads [i] = NULL; /* ignore this thread in next loop */
3382 LOCK_THREAD (thread);
3384 if ((thread->state & ThreadState_Suspended) != 0 ||
3385 (thread->state & ThreadState_StopRequested) != 0 ||
3386 (thread->state & ThreadState_Stopped) != 0) {
3387 UNLOCK_THREAD (thread);
3388 CloseHandle (wait->handles [i]);
3389 wait->threads [i] = NULL; /* ignore this thread in next loop */
3395 /* Convert abort requests into suspend requests */
3396 if ((thread->state & ThreadState_AbortRequested) != 0)
3397 thread->state &= ~ThreadState_AbortRequested;
3399 thread->state |= ThreadState_SuspendRequested;
3401 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3402 async_suspend_internal (thread, TRUE);
3404 if (eventidx <= 0) {
3406 * If there are threads which are starting up, we wait until they
3407 * are suspended when they try to register in the threads hash.
3408 * This is guaranteed to finish, since the threads which can create new
3409 * threads get suspended after a while.
3410 * FIXME: The finalizer thread can still create new threads.
3412 mono_threads_lock ();
3413 if (threads_starting_up)
3414 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3417 mono_threads_unlock ();
3419 mono_thread_info_sleep (100, NULL);
3427 MonoInternalThread *thread;
3428 MonoStackFrameInfo *frames;
3429 int nframes, max_frames;
3430 int nthreads, max_threads;
3431 MonoInternalThread **threads;
3432 } ThreadDumpUserData;
3434 static gboolean thread_dump_requested;
3436 /* This needs to be async safe */
3438 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3440 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3442 if (ud->nframes < ud->max_frames) {
3443 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3450 /* This needs to be async safe */
3451 static SuspendThreadResult
3452 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3454 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3455 MonoInternalThread *thread = user_data->thread;
3458 /* This no longer works with remote unwinding */
3460 wapi_desc = wapi_current_thread_desc ();
3461 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3466 if (thread == mono_thread_internal_current ())
3467 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3469 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3471 return MonoResumeThread;
3475 int nthreads, max_threads;
3476 MonoInternalThread **threads;
3477 } CollectThreadsUserData;
3480 collect_thread (gpointer key, gpointer value, gpointer user)
3482 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3483 MonoInternalThread *thread = (MonoInternalThread *)value;
3485 if (ud->nthreads < ud->max_threads)
3486 ud->threads [ud->nthreads ++] = thread;
3490 * Collect running threads into the THREADS array.
3491 * THREADS should be an array allocated on the stack.
3494 collect_threads (MonoInternalThread **thread_array, int max_threads)
3496 CollectThreadsUserData ud;
3498 memset (&ud, 0, sizeof (ud));
3499 /* This array contains refs, but its on the stack, so its ok */
3500 ud.threads = thread_array;
3501 ud.max_threads = max_threads;
3503 mono_threads_lock ();
3504 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3505 mono_threads_unlock ();
3511 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3513 GString* text = g_string_new (0);
3515 GError *error = NULL;
3518 ud->thread = thread;
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);
3529 * Do all the non async-safe work outside of get_thread_dump.
3532 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3534 g_string_append_printf (text, "\n\"%s\"", name);
3537 else if (thread->threadpool_thread) {
3538 g_string_append (text, "\n\"<threadpool thread>\"");
3540 g_string_append (text, "\n\"<unnamed thread>\"");
3543 for (i = 0; i < ud->nframes; ++i) {
3544 MonoStackFrameInfo *frame = &ud->frames [i];
3545 MonoMethod *method = NULL;
3547 if (frame->type == FRAME_TYPE_MANAGED)
3548 method = mono_jit_info_get_method (frame->ji);
3551 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3552 g_string_append_printf (text, " %s\n", location);
3555 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3559 fprintf (stdout, "%s", text->str);
3561 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3562 OutputDebugStringA(text->str);
3565 g_string_free (text, TRUE);
3570 mono_threads_perform_thread_dump (void)
3572 ThreadDumpUserData ud;
3573 MonoInternalThread *thread_array [128];
3574 int tindex, nthreads;
3576 if (!thread_dump_requested)
3579 printf ("Full thread dump:\n");
3581 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3582 nthreads = collect_threads (thread_array, 128);
3584 memset (&ud, 0, sizeof (ud));
3585 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3586 ud.max_frames = 256;
3588 for (tindex = 0; tindex < nthreads; ++tindex)
3589 dump_thread (thread_array [tindex], &ud);
3593 thread_dump_requested = FALSE;
3596 /* Obtain the thread dump of all threads */
3598 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3601 ThreadDumpUserData ud;
3602 MonoInternalThread *thread_array [128];
3603 MonoDomain *domain = mono_domain_get ();
3604 MonoDebugSourceLocation *location;
3605 int tindex, nthreads;
3607 mono_error_init (error);
3609 *out_threads = NULL;
3610 *out_stack_frames = NULL;
3612 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3613 nthreads = collect_threads (thread_array, 128);
3615 memset (&ud, 0, sizeof (ud));
3616 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3617 ud.max_frames = 256;
3619 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3622 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3626 for (tindex = 0; tindex < nthreads; ++tindex) {
3627 MonoInternalThread *thread = thread_array [tindex];
3628 MonoArray *thread_frames;
3634 /* Collect frames for the thread */
3635 if (thread == mono_thread_internal_current ()) {
3636 get_thread_dump (mono_thread_info_current (), &ud);
3638 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3641 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3643 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3646 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3648 for (i = 0; i < ud.nframes; ++i) {
3649 MonoStackFrameInfo *frame = &ud.frames [i];
3650 MonoMethod *method = NULL;
3651 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3655 sf->native_offset = frame->native_offset;
3657 if (frame->type == FRAME_TYPE_MANAGED)
3658 method = mono_jit_info_get_method (frame->ji);
3661 sf->method_address = (gsize) frame->ji->code_start;
3663 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3666 MONO_OBJECT_SETREF (sf, method, rm);
3668 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3670 sf->il_offset = location->il_offset;
3672 if (location && location->source_file) {
3673 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3674 sf->line = location->row;
3675 sf->column = location->column;
3677 mono_debug_free_source_location (location);
3682 mono_array_setref (thread_frames, i, sf);
3688 return is_ok (error);
3692 * mono_threads_request_thread_dump:
3694 * Ask all threads except the current to print their stacktrace to stdout.
3697 mono_threads_request_thread_dump (void)
3699 /*The new thread dump code runs out of the finalizer thread. */
3700 thread_dump_requested = TRUE;
3701 mono_gc_finalize_notify ();
3706 gint allocated; /* +1 so that refs [allocated] == NULL */
3710 typedef struct ref_stack RefStack;
3713 ref_stack_new (gint initial_size)
3717 initial_size = MAX (initial_size, 16) + 1;
3718 rs = g_new0 (RefStack, 1);
3719 rs->refs = g_new0 (gpointer, initial_size);
3720 rs->allocated = initial_size;
3725 ref_stack_destroy (gpointer ptr)
3727 RefStack *rs = (RefStack *)ptr;
3736 ref_stack_push (RefStack *rs, gpointer ptr)
3738 g_assert (rs != NULL);
3740 if (rs->bottom >= rs->allocated) {
3741 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3742 rs->allocated <<= 1;
3743 rs->refs [rs->allocated] = NULL;
3745 rs->refs [rs->bottom++] = ptr;
3749 ref_stack_pop (RefStack *rs)
3751 if (rs == NULL || rs->bottom == 0)
3755 rs->refs [rs->bottom] = NULL;
3759 ref_stack_find (RefStack *rs, gpointer ptr)
3766 for (refs = rs->refs; refs && *refs; refs++) {
3774 * mono_thread_push_appdomain_ref:
3776 * Register that the current thread may have references to objects in domain
3777 * @domain on its stack. Each call to this function should be paired with a
3778 * call to pop_appdomain_ref.
3781 mono_thread_push_appdomain_ref (MonoDomain *domain)
3783 MonoInternalThread *thread = mono_thread_internal_current ();
3786 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3787 SPIN_LOCK (thread->lock_thread_id);
3788 if (thread->appdomain_refs == NULL)
3789 thread->appdomain_refs = ref_stack_new (16);
3790 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3791 SPIN_UNLOCK (thread->lock_thread_id);
3796 mono_thread_pop_appdomain_ref (void)
3798 MonoInternalThread *thread = mono_thread_internal_current ();
3801 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3802 SPIN_LOCK (thread->lock_thread_id);
3803 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3804 SPIN_UNLOCK (thread->lock_thread_id);
3809 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3812 SPIN_LOCK (thread->lock_thread_id);
3813 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3814 SPIN_UNLOCK (thread->lock_thread_id);
3819 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3821 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3824 typedef struct abort_appdomain_data {
3825 struct wait_data wait;
3827 } abort_appdomain_data;
3830 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3832 MonoInternalThread *thread = (MonoInternalThread*)value;
3833 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3834 MonoDomain *domain = data->domain;
3836 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3837 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3839 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3840 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3843 data->wait.handles [data->wait.num] = handle;
3844 data->wait.threads [data->wait.num] = thread;
3847 /* Just ignore the rest, we can't do anything with
3855 * mono_threads_abort_appdomain_threads:
3857 * Abort threads which has references to the given appdomain.
3860 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3862 #ifdef __native_client__
3866 abort_appdomain_data user_data;
3868 int orig_timeout = timeout;
3871 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3873 start_time = mono_msec_ticks ();
3875 mono_threads_lock ();
3877 user_data.domain = domain;
3878 user_data.wait.num = 0;
3879 /* This shouldn't take any locks */
3880 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3881 mono_threads_unlock ();
3883 if (user_data.wait.num > 0) {
3884 /* Abort the threads outside the threads lock */
3885 for (i = 0; i < user_data.wait.num; ++i)
3886 mono_thread_internal_abort (user_data.wait.threads [i]);
3889 * We should wait for the threads either to abort, or to leave the
3890 * domain. We can't do the latter, so we wait with a timeout.
3892 wait_for_tids (&user_data.wait, 100);
3895 /* Update remaining time */
3896 timeout -= mono_msec_ticks () - start_time;
3897 start_time = mono_msec_ticks ();
3899 if (orig_timeout != -1 && timeout < 0)
3902 while (user_data.wait.num > 0);
3904 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3910 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3912 MonoInternalThread *thread = (MonoInternalThread*)value;
3913 MonoDomain *domain = (MonoDomain*)user_data;
3916 /* No locking needed here */
3917 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3919 if (thread->cached_culture_info) {
3920 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3921 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3922 if (obj && obj->vtable->domain == domain)
3923 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3929 * mono_threads_clear_cached_culture:
3931 * Clear the cached_current_culture from all threads if it is in the
3935 mono_threads_clear_cached_culture (MonoDomain *domain)
3937 mono_threads_lock ();
3938 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3939 mono_threads_unlock ();
3943 * mono_thread_get_undeniable_exception:
3945 * Return an exception which needs to be raised when leaving a catch clause.
3946 * This is used for undeniable exception propagation.
3949 mono_thread_get_undeniable_exception (void)
3951 MonoInternalThread *thread = mono_thread_internal_current ();
3953 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3955 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3956 * exception if the thread no longer references a dying appdomain.
3958 thread->abort_exc->trace_ips = NULL;
3959 thread->abort_exc->stack_trace = NULL;
3960 return thread->abort_exc;
3966 #if MONO_SMALL_CONFIG
3967 #define NUM_STATIC_DATA_IDX 4
3968 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3972 #define NUM_STATIC_DATA_IDX 8
3973 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3974 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3978 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3979 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3982 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3984 gpointer *static_data = (gpointer *)addr;
3986 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3987 void **ptr = (void **)static_data [i];
3992 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3993 void **p = ptr + idx;
3996 mark_func ((MonoObject**)p, gc_data);
4002 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4004 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4008 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4010 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4014 * mono_alloc_static_data
4016 * Allocate memory blocks for storing threads or context static data
4019 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4021 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4024 gpointer* static_data = *static_data_ptr;
4026 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4027 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4029 if (mono_gc_user_markers_supported ()) {
4030 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4031 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4033 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4034 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4037 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4038 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4039 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4040 *static_data_ptr = static_data;
4041 static_data [0] = static_data;
4044 for (i = 1; i <= idx; ++i) {
4045 if (static_data [i])
4048 if (mono_gc_user_markers_supported ())
4049 static_data [i] = g_malloc0 (static_data_size [i]);
4051 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4052 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4053 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4058 mono_free_static_data (gpointer* static_data)
4061 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4062 gpointer p = static_data [i];
4066 * At this point, the static data pointer array is still registered with the
4067 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4068 * data. Freeing the individual arrays without first nulling their slots
4069 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4070 * such an already freed array. See bug #13813.
4072 static_data [i] = NULL;
4073 mono_memory_write_barrier ();
4074 if (mono_gc_user_markers_supported ())
4077 mono_gc_free_fixed (p);
4079 mono_gc_free_fixed (static_data);
4083 * mono_init_static_data_info
4085 * Initializes static data counters
4087 static void mono_init_static_data_info (StaticDataInfo *static_data)
4089 static_data->idx = 0;
4090 static_data->offset = 0;
4091 static_data->freelist = NULL;
4095 * mono_alloc_static_data_slot
4097 * Generates an offset for static data. static_data contains the counters
4098 * used to generate it.
4101 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4103 if (!static_data->idx && !static_data->offset) {
4105 * we use the first chunk of the first allocation also as
4106 * an array for the rest of the data
4108 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4110 static_data->offset += align - 1;
4111 static_data->offset &= ~(align - 1);
4112 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4113 static_data->idx ++;
4114 g_assert (size <= static_data_size [static_data->idx]);
4115 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4116 static_data->offset = 0;
4118 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4119 static_data->offset += size;
4124 * ensure thread static fields already allocated are valid for thread
4125 * This function is called when a thread is created or on thread attach.
4128 thread_adjust_static_data (MonoInternalThread *thread)
4130 mono_threads_lock ();
4131 if (thread_static_info.offset || thread_static_info.idx > 0) {
4132 /* get the current allocated size */
4133 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4134 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4136 mono_threads_unlock ();
4140 * LOCKING: requires that threads_mutex is held
4143 context_adjust_static_data (MonoAppContext *ctx)
4145 if (context_static_info.offset || context_static_info.idx > 0) {
4146 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4147 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4148 ctx->data->static_data = ctx->static_data;
4153 * LOCKING: requires that threads_mutex is held
4156 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4158 MonoInternalThread *thread = (MonoInternalThread *)value;
4159 guint32 offset = GPOINTER_TO_UINT (user);
4161 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4165 * LOCKING: requires that threads_mutex is held
4168 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4170 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4175 guint32 offset = GPOINTER_TO_UINT (user);
4176 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4177 ctx->data->static_data = ctx->static_data;
4180 static StaticDataFreeList*
4181 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4183 StaticDataFreeList* prev = NULL;
4184 StaticDataFreeList* tmp = static_data->freelist;
4186 if (tmp->size == size) {
4188 prev->next = tmp->next;
4190 static_data->freelist = tmp->next;
4199 #if SIZEOF_VOID_P == 4
4206 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4208 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4210 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4211 MonoBitSet *rb = sets [idx];
4212 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4213 offset /= sizeof (uintptr_t);
4214 /* offset is now the bitmap offset */
4215 for (int i = 0; i < numbits; ++i) {
4216 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4217 mono_bitset_set_fast (rb, offset + i);
4222 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4224 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4225 MonoBitSet *rb = sets [idx];
4226 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4227 offset /= sizeof (uintptr_t);
4228 /* offset is now the bitmap offset */
4229 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4230 mono_bitset_clear_fast (rb, offset + i);
4234 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4236 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4238 StaticDataInfo *info;
4241 if (static_type == SPECIAL_STATIC_THREAD) {
4242 info = &thread_static_info;
4243 sets = thread_reference_bitmaps;
4245 info = &context_static_info;
4246 sets = context_reference_bitmaps;
4249 mono_threads_lock ();
4251 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4255 offset = item->offset;
4258 offset = mono_alloc_static_data_slot (info, size, align);
4261 update_reference_bitmap (sets, offset, bitmap, numbits);
4263 if (static_type == SPECIAL_STATIC_THREAD) {
4264 /* This can be called during startup */
4265 if (threads != NULL)
4266 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4268 if (contexts != NULL)
4269 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4271 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4274 mono_threads_unlock ();
4280 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4282 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4284 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4285 return get_thread_static_data (thread, offset);
4287 return get_context_static_data (thread->current_appcontext, offset);
4292 mono_get_special_static_data (guint32 offset)
4294 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4303 * LOCKING: requires that threads_mutex is held
4306 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4308 MonoInternalThread *thread = (MonoInternalThread *)value;
4309 OffsetSize *data = (OffsetSize *)user;
4310 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4311 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4314 if (!thread->static_data || !thread->static_data [idx])
4316 ptr = ((char*) thread->static_data [idx]) + off;
4317 mono_gc_bzero_atomic (ptr, data->size);
4321 * LOCKING: requires that threads_mutex is held
4324 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4326 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4331 OffsetSize *data = (OffsetSize *)user;
4332 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4333 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4336 if (!ctx->static_data || !ctx->static_data [idx])
4339 ptr = ((char*) ctx->static_data [idx]) + off;
4340 mono_gc_bzero_atomic (ptr, data->size);
4344 do_free_special_slot (guint32 offset, guint32 size)
4346 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4348 StaticDataInfo *info;
4350 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4351 info = &thread_static_info;
4352 sets = thread_reference_bitmaps;
4354 info = &context_static_info;
4355 sets = context_reference_bitmaps;
4358 guint32 data_offset = offset;
4359 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4360 OffsetSize data = { data_offset, size };
4362 clear_reference_bitmap (sets, data.offset, data.size);
4364 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4365 if (threads != NULL)
4366 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4368 if (contexts != NULL)
4369 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4372 if (!mono_runtime_is_shutting_down ()) {
4373 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4375 item->offset = offset;
4378 item->next = info->freelist;
4379 info->freelist = item;
4384 do_free_special (gpointer key, gpointer value, gpointer data)
4386 MonoClassField *field = (MonoClassField *)key;
4387 guint32 offset = GPOINTER_TO_UINT (value);
4390 size = mono_type_size (field->type, &align);
4391 do_free_special_slot (offset, size);
4395 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4397 mono_threads_lock ();
4399 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4401 mono_threads_unlock ();
4405 static void CALLBACK dummy_apc (ULONG_PTR param)
4411 * mono_thread_execute_interruption
4413 * Performs the operation that the requested thread state requires (abort,
4416 static MonoException*
4417 mono_thread_execute_interruption (void)
4419 MonoInternalThread *thread = mono_thread_internal_current ();
4420 MonoThread *sys_thread = mono_thread_current ();
4422 LOCK_THREAD (thread);
4424 /* MonoThread::interruption_requested can only be changed with atomics */
4425 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4426 /* this will consume pending APC calls */
4428 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4430 InterlockedDecrement (&thread_interruption_requested);
4432 /* Clear the interrupted flag of the thread so it can wait again */
4433 mono_thread_info_clear_self_interrupt ();
4436 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4437 if (sys_thread->pending_exception) {
4440 exc = sys_thread->pending_exception;
4441 sys_thread->pending_exception = NULL;
4443 UNLOCK_THREAD (thread);
4445 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4446 UNLOCK_THREAD (thread);
4447 g_assert (sys_thread->pending_exception == NULL);
4448 if (thread->abort_exc == NULL) {
4450 * This might be racy, but it has to be called outside the lock
4451 * since it calls managed code.
4453 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4455 return thread->abort_exc;
4457 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4458 /* calls UNLOCK_THREAD (thread) */
4459 self_suspend_internal ();
4462 else if ((thread->state & ThreadState_StopRequested) != 0) {
4463 /* FIXME: do this through the JIT? */
4465 UNLOCK_THREAD (thread);
4467 mono_thread_exit ();
4469 } else if (thread->thread_interrupt_requested) {
4471 thread->thread_interrupt_requested = FALSE;
4472 UNLOCK_THREAD (thread);
4474 return(mono_get_exception_thread_interrupted ());
4477 UNLOCK_THREAD (thread);
4483 * mono_thread_request_interruption
4485 * A signal handler can call this method to request the interruption of a
4486 * thread. The result of the interruption will depend on the current state of
4487 * the thread. If the result is an exception that needs to be throw, it is
4488 * provided as return value.
4491 mono_thread_request_interruption (gboolean running_managed)
4493 MonoInternalThread *thread = mono_thread_internal_current ();
4495 /* The thread may already be stopping */
4500 if (thread->interrupt_on_stop &&
4501 thread->state & ThreadState_StopRequested &&
4502 thread->state & ThreadState_Background)
4506 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4508 InterlockedIncrement (&thread_interruption_requested);
4510 if (!running_managed || is_running_protected_wrapper ()) {
4511 /* Can't stop while in unmanaged code. Increase the global interruption
4512 request count. When exiting the unmanaged method the count will be
4513 checked and the thread will be interrupted. */
4515 /* this will awake the thread if it is in WaitForSingleObject
4517 /* Our implementation of this function ignores the func argument */
4519 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4521 mono_thread_info_self_interrupt ();
4526 return mono_thread_execute_interruption ();
4530 /*This function should be called by a thread after it has exited all of
4531 * its handle blocks at interruption time.*/
4533 mono_thread_resume_interruption (void)
4535 MonoInternalThread *thread = mono_thread_internal_current ();
4536 gboolean still_aborting;
4538 /* The thread may already be stopping */
4542 LOCK_THREAD (thread);
4543 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4544 UNLOCK_THREAD (thread);
4546 /*This can happen if the protected block called Thread::ResetAbort*/
4547 if (!still_aborting)
4550 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4552 InterlockedIncrement (&thread_interruption_requested);
4554 mono_thread_info_self_interrupt ();
4556 return mono_thread_execute_interruption ();
4559 gboolean mono_thread_interruption_requested ()
4561 if (thread_interruption_requested) {
4562 MonoInternalThread *thread = mono_thread_internal_current ();
4563 /* The thread may already be stopping */
4565 return (thread->interruption_requested);
4570 static MonoException*
4571 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4573 MonoInternalThread *thread = mono_thread_internal_current ();
4575 /* The thread may already be stopping */
4579 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4580 MonoException* exc = mono_thread_execute_interruption ();
4588 * Performs the interruption of the current thread, if one has been requested,
4589 * and the thread is not running a protected wrapper.
4590 * Return the exception which needs to be thrown, if any.
4593 mono_thread_interruption_checkpoint (void)
4595 return mono_thread_interruption_checkpoint_request (FALSE);
4599 * Performs the interruption of the current thread, if one has been requested.
4600 * Return the exception which needs to be thrown, if any.
4603 mono_thread_force_interruption_checkpoint_noraise (void)
4605 return mono_thread_interruption_checkpoint_request (TRUE);
4609 * mono_set_pending_exception:
4611 * Set the pending exception of the current thread to EXC.
4612 * The exception will be thrown when execution returns to managed code.
4615 mono_set_pending_exception (MonoException *exc)
4617 MonoThread *thread = mono_thread_current ();
4619 /* The thread may already be stopping */
4623 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4625 mono_thread_request_interruption (FALSE);
4629 * mono_thread_interruption_request_flag:
4631 * Returns the address of a flag that will be non-zero if an interruption has
4632 * been requested for a thread. The thread to interrupt may not be the current
4633 * thread, so an additional call to mono_thread_interruption_requested() or
4634 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4637 gint32* mono_thread_interruption_request_flag ()
4639 return &thread_interruption_requested;
4643 mono_thread_init_apartment_state (void)
4646 MonoInternalThread* thread = mono_thread_internal_current ();
4648 /* Positive return value indicates success, either
4649 * S_OK if this is first CoInitialize call, or
4650 * S_FALSE if CoInitialize already called, but with same
4651 * threading model. A negative value indicates failure,
4652 * probably due to trying to change the threading model.
4654 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4655 ? COINIT_APARTMENTTHREADED
4656 : COINIT_MULTITHREADED) < 0) {
4657 thread->apartment_state = ThreadApartmentState_Unknown;
4663 mono_thread_cleanup_apartment_state (void)
4666 MonoInternalThread* thread = mono_thread_internal_current ();
4668 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4675 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4677 LOCK_THREAD (thread);
4678 thread->state |= state;
4679 UNLOCK_THREAD (thread);
4683 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4685 LOCK_THREAD (thread);
4686 thread->state &= ~state;
4687 UNLOCK_THREAD (thread);
4691 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4693 gboolean ret = FALSE;
4695 LOCK_THREAD (thread);
4697 if ((thread->state & test) != 0) {
4701 UNLOCK_THREAD (thread);
4706 static gboolean has_tls_get = FALSE;
4709 mono_runtime_set_has_tls_get (gboolean val)
4715 mono_runtime_has_tls_get (void)
4721 self_interrupt_thread (void *_unused)
4723 MonoThreadInfo *info = mono_thread_info_current ();
4724 MonoException *exc = mono_thread_execute_interruption ();
4725 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4726 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. */
4727 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4731 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4735 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4739 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4741 MonoJitInfo **dest = (MonoJitInfo **)data;
4747 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4749 MonoJitInfo *ji = NULL;
4754 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4755 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4756 * where we hold runtime locks.
4758 if (!mono_threads_is_coop_enabled ())
4759 mono_thread_info_set_is_async_context (TRUE);
4760 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4761 if (!mono_threads_is_coop_enabled ())
4762 mono_thread_info_set_is_async_context (FALSE);
4767 MonoInternalThread *thread;
4768 gboolean install_async_abort;
4769 MonoThreadInfoInterruptToken *interrupt_token;
4772 static SuspendThreadResult
4773 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4775 AbortThreadData *data = (AbortThreadData *)ud;
4776 MonoInternalThread *thread = data->thread;
4777 MonoJitInfo *ji = NULL;
4778 gboolean protected_wrapper;
4779 gboolean running_managed;
4781 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4782 return MonoResumeThread;
4784 /*someone is already interrupting it*/
4785 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4786 return MonoResumeThread;
4788 InterlockedIncrement (&thread_interruption_requested);
4790 ji = mono_thread_info_get_last_managed (info);
4791 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4792 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4794 if (!protected_wrapper && running_managed) {
4795 /*We are in managed code*/
4796 /*Set the thread to call */
4797 if (data->install_async_abort)
4798 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4799 return MonoResumeThread;
4802 * This will cause waits to be broken.
4803 * It will also prevent the thread from entering a wait, so if the thread returns
4804 * from the wait before it receives the abort signal, it will just spin in the wait
4805 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4808 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4810 return MonoResumeThread;
4815 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4817 AbortThreadData data;
4819 g_assert (thread != mono_thread_internal_current ());
4821 data.thread = thread;
4822 data.install_async_abort = install_async_abort;
4823 data.interrupt_token = NULL;
4825 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4826 if (data.interrupt_token)
4827 mono_thread_info_finish_interrupt (data.interrupt_token);
4828 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4832 self_abort_internal (MonoError *error)
4836 mono_error_init (error);
4838 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4839 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4841 exc = mono_thread_request_interruption (TRUE);
4843 mono_error_set_exception_instance (error, exc);
4845 mono_thread_info_self_interrupt ();
4849 MonoInternalThread *thread;
4851 MonoThreadInfoInterruptToken *interrupt_token;
4852 } SuspendThreadData;
4854 static SuspendThreadResult
4855 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4857 SuspendThreadData *data = (SuspendThreadData *)ud;
4858 MonoInternalThread *thread = data->thread;
4859 MonoJitInfo *ji = NULL;
4860 gboolean protected_wrapper;
4861 gboolean running_managed;
4863 ji = mono_thread_info_get_last_managed (info);
4864 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4865 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4867 if (running_managed && !protected_wrapper) {
4868 thread->state &= ~ThreadState_SuspendRequested;
4869 thread->state |= ThreadState_Suspended;
4870 return KeepSuspended;
4872 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4873 InterlockedIncrement (&thread_interruption_requested);
4874 if (data->interrupt)
4875 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4877 return MonoResumeThread;
4881 /* LOCKING: called with @thread synch_cs held, and releases it */
4883 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4885 SuspendThreadData data;
4887 g_assert (thread != mono_thread_internal_current ());
4889 data.thread = thread;
4890 data.interrupt = interrupt;
4891 data.interrupt_token = NULL;
4893 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4894 if (data.interrupt_token)
4895 mono_thread_info_finish_interrupt (data.interrupt_token);
4897 UNLOCK_THREAD (thread);
4900 /* LOCKING: called with @thread synch_cs held, and releases it */
4902 self_suspend_internal (void)
4904 MonoInternalThread *thread;
4906 thread = mono_thread_internal_current ();
4908 mono_thread_info_begin_self_suspend ();
4909 thread->state &= ~ThreadState_SuspendRequested;
4910 thread->state |= ThreadState_Suspended;
4912 UNLOCK_THREAD (thread);
4914 mono_thread_info_end_self_suspend ();
4918 * mono_thread_is_foreign:
4919 * @thread: the thread to query
4921 * This function allows one to determine if a thread was created by the mono runtime and has
4922 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4924 * Returns: TRUE if @thread was not created by the runtime.
4927 mono_thread_is_foreign (MonoThread *thread)
4929 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4930 return info->runtime_thread == FALSE;
4934 * mono_add_joinable_thread:
4936 * Add TID to the list of joinable threads.
4937 * LOCKING: Acquires the threads lock.
4940 mono_threads_add_joinable_thread (gpointer tid)
4944 * We cannot detach from threads because it causes problems like
4945 * 2fd16f60/r114307. So we collect them and join them when
4946 * we have time (in he finalizer thread).
4948 joinable_threads_lock ();
4949 if (!joinable_threads)
4950 joinable_threads = g_hash_table_new (NULL, NULL);
4951 g_hash_table_insert (joinable_threads, tid, tid);
4952 joinable_thread_count ++;
4953 joinable_threads_unlock ();
4955 mono_gc_finalize_notify ();
4960 * mono_threads_join_threads:
4962 * Join all joinable threads. This is called from the finalizer thread.
4963 * LOCKING: Acquires the threads lock.
4966 mono_threads_join_threads (void)
4969 GHashTableIter iter;
4976 if (!joinable_thread_count)
4980 joinable_threads_lock ();
4982 if (g_hash_table_size (joinable_threads)) {
4983 g_hash_table_iter_init (&iter, joinable_threads);
4984 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4985 thread = (pthread_t)tid;
4986 g_hash_table_remove (joinable_threads, key);
4987 joinable_thread_count --;
4990 joinable_threads_unlock ();
4992 if (thread != pthread_self ()) {
4994 /* This shouldn't block */
4995 pthread_join (thread, NULL);
5008 * Wait for thread TID to exit.
5009 * LOCKING: Acquires the threads lock.
5012 mono_thread_join (gpointer tid)
5016 gboolean found = FALSE;
5018 joinable_threads_lock ();
5019 if (!joinable_threads)
5020 joinable_threads = g_hash_table_new (NULL, NULL);
5021 if (g_hash_table_lookup (joinable_threads, tid)) {
5022 g_hash_table_remove (joinable_threads, tid);
5023 joinable_thread_count --;
5026 joinable_threads_unlock ();
5029 thread = (pthread_t)tid;
5031 pthread_join (thread, NULL);
5037 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5039 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5040 mono_thread_interruption_checkpoint ();
5043 static inline gboolean
5044 is_appdomainunloaded_exception (MonoClass *klass)
5046 return klass == mono_class_get_appdomain_unloaded_exception_class ();
5049 static inline gboolean
5050 is_threadabort_exception (MonoClass *klass)
5052 return klass == mono_defaults.threadabortexception_class;
5056 mono_thread_internal_unhandled_exception (MonoObject* exc)
5058 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5059 MonoClass *klass = exc->vtable->klass;
5060 if (is_threadabort_exception (klass)) {
5061 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5062 } else if (!is_appdomainunloaded_exception (klass)) {
5063 mono_unhandled_exception (exc);
5064 if (mono_environment_exitcode_get () == 1)
5071 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5074 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5075 mono_error_set_pending_exception (&error);
5079 * mono_threads_attach_coop: called by native->managed wrappers
5083 * - @return: the original domain which needs to be restored, or NULL.
5086 * - @dummy: contains the original domain
5087 * - @return: a cookie containing current MonoThreadInfo*.
5090 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5093 gboolean fresh_thread = FALSE;
5096 /* Happens when called from AOTed code which is only used in the root domain. */
5097 domain = mono_get_root_domain ();
5102 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5103 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5104 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5105 * we're only responsible for making the cookie. */
5106 if (mono_threads_is_coop_enabled ()) {
5107 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5108 fresh_thread = !info || !mono_thread_info_is_live (info);
5111 if (!mono_thread_internal_current ()) {
5112 mono_thread_attach_full (domain, FALSE);
5115 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5118 orig = mono_domain_get ();
5120 mono_domain_set (domain, TRUE);
5122 if (!mono_threads_is_coop_enabled ())
5123 return orig != domain ? orig : NULL;
5127 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5128 * return the right cookie. */
5129 return mono_threads_enter_gc_unsafe_region_cookie ();
5132 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5133 return mono_threads_enter_gc_unsafe_region (dummy);
5138 * mono_threads_detach_coop: called by native->managed wrappers
5141 * - @cookie: the original domain which needs to be restored, or NULL.
5145 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5146 * - @dummy: contains the original domain
5149 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5151 MonoDomain *domain, *orig;
5153 if (!mono_threads_is_coop_enabled ()) {
5154 orig = (MonoDomain*) cookie;
5156 mono_domain_set (orig, TRUE);
5158 orig = (MonoDomain*) *dummy;
5160 domain = mono_domain_get ();
5163 /* it won't do anything if cookie is NULL
5164 * thread state RUNNING -> (RUNNING|BLOCKING) */
5165 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5167 if (orig != domain) {
5169 mono_domain_unset ();
5171 mono_domain_set (orig, TRUE);