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>
47 #include <mono/utils/w32handle.h>
48 #include <mono/metadata/w32event.h>
50 #include <mono/metadata/gc-internals.h>
51 #include <mono/metadata/reflection-internals.h>
52 #include <mono/metadata/abi-details.h>
58 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
59 #define USE_TKILL_ON_ANDROID 1
62 #ifdef PLATFORM_ANDROID
65 #ifdef USE_TKILL_ON_ANDROID
66 extern int tkill (pid_t tid, int signal);
70 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
71 #define THREAD_DEBUG(a)
72 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
73 #define THREAD_WAIT_DEBUG(a)
74 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
75 #define LIBGC_DEBUG(a)
77 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
78 #define SPIN_LOCK(i) do { \
79 if (SPIN_TRYLOCK (i)) \
83 #define SPIN_UNLOCK(i) i = 0
85 #define LOCK_THREAD(thread) lock_thread((thread))
86 #define UNLOCK_THREAD(thread) unlock_thread((thread))
98 typedef struct _StaticDataFreeList StaticDataFreeList;
99 struct _StaticDataFreeList {
100 StaticDataFreeList *next;
108 StaticDataFreeList *freelist;
111 /* Number of cached culture objects in the MonoThread->cached_culture_info array
112 * (per-type): we use the first NUM entries for CultureInfo and the last for
113 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
115 #define NUM_CACHED_CULTURES 4
116 #define CULTURES_START_IDX 0
117 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
119 /* Controls access to the 'threads' hash table */
120 static void mono_threads_lock (void);
121 static void mono_threads_unlock (void);
122 static MonoCoopMutex threads_mutex;
124 /* Controls access to the 'joinable_threads' hash table */
125 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
126 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
127 static mono_mutex_t joinable_threads_mutex;
129 /* Holds current status of static data heap */
130 static StaticDataInfo thread_static_info;
131 static StaticDataInfo context_static_info;
133 /* The hash of existing threads (key is thread ID, value is
134 * MonoInternalThread*) that need joining before exit
136 static MonoGHashTable *threads=NULL;
138 /* List of app context GC handles.
139 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
141 static GHashTable *contexts = NULL;
143 /* Cleanup queue for contexts. */
144 static MonoReferenceQueue *context_queue;
147 * Threads which are starting up and they are not in the 'threads' hash yet.
148 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
149 * Protected by mono_threads_lock ().
151 static MonoGHashTable *threads_starting_up = NULL;
153 /* The TLS key that holds the MonoObject assigned to each thread */
154 static MonoNativeTlsKey current_object_key;
157 /* Protected by the threads lock */
158 static GHashTable *joinable_threads;
159 static int joinable_thread_count;
161 #ifdef MONO_HAVE_FAST_TLS
162 /* we need to use both the Tls* functions and __thread because
163 * the gc needs to see all the threads
165 MONO_FAST_TLS_DECLARE(tls_current_object);
166 #define SET_CURRENT_OBJECT(x) do { \
167 MONO_FAST_TLS_SET (tls_current_object, x); \
168 mono_native_tls_set_value (current_object_key, x); \
170 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
172 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
173 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
176 /* function called at thread start */
177 static MonoThreadStartCB mono_thread_start_cb = NULL;
179 /* function called at thread attach */
180 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
182 /* function called at thread cleanup */
183 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
185 /* The default stack size for each thread */
186 static guint32 default_stacksize = 0;
187 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
189 static void context_adjust_static_data (MonoAppContext *ctx);
190 static void mono_free_static_data (gpointer* static_data);
191 static void mono_init_static_data_info (StaticDataInfo *static_data);
192 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
193 static gboolean mono_thread_resume (MonoInternalThread* thread);
194 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
195 static void self_abort_internal (MonoError *error);
196 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
197 static void self_suspend_internal (void);
199 static MonoException* mono_thread_execute_interruption (void);
200 static void ref_stack_destroy (gpointer rs);
202 /* Spin lock for InterlockedXXX 64 bit functions */
203 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
204 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
205 static mono_mutex_t interlocked_mutex;
207 /* global count of thread interruptions requested */
208 static gint32 thread_interruption_requested = 0;
210 /* Event signaled when a thread changes its background mode */
211 static HANDLE background_change_event;
213 static gboolean shutting_down = FALSE;
215 static gint32 managed_thread_id_counter = 0;
217 /* Class lazy loading functions */
218 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
221 mono_threads_lock (void)
223 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
227 mono_threads_unlock (void)
229 mono_locks_coop_release (&threads_mutex, ThreadsLock);
234 get_next_managed_thread_id (void)
236 return InterlockedIncrement (&managed_thread_id_counter);
240 mono_thread_get_tls_key (void)
242 return current_object_key;
246 mono_thread_get_tls_offset (void)
251 if (current_object_key)
252 offset = current_object_key;
254 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
259 static inline MonoNativeThreadId
260 thread_get_tid (MonoInternalThread *thread)
262 /* We store the tid as a guint64 to keep the object layout constant between platforms */
263 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
266 static void ensure_synch_cs_set (MonoInternalThread *thread)
268 MonoCoopMutex *synch_cs;
270 if (thread->synch_cs != NULL) {
274 synch_cs = g_new0 (MonoCoopMutex, 1);
275 mono_coop_mutex_init_recursive (synch_cs);
277 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
278 synch_cs, NULL) != NULL) {
279 /* Another thread must have installed this CS */
280 mono_coop_mutex_destroy (synch_cs);
286 lock_thread (MonoInternalThread *thread)
288 if (!thread->synch_cs)
289 ensure_synch_cs_set (thread);
291 g_assert (thread->synch_cs);
293 mono_coop_mutex_lock (thread->synch_cs);
297 unlock_thread (MonoInternalThread *thread)
299 mono_coop_mutex_unlock (thread->synch_cs);
302 static inline gboolean
303 is_appdomainunloaded_exception (MonoClass *klass)
305 return klass == mono_class_get_appdomain_unloaded_exception_class ();
308 static inline gboolean
309 is_threadabort_exception (MonoClass *klass)
311 return klass == mono_defaults.threadabortexception_class;
315 * NOTE: this function can be called also for threads different from the current one:
316 * make sure no code called from it will ever assume it is run on the thread that is
317 * getting cleaned up.
319 static void thread_cleanup (MonoInternalThread *thread)
323 g_assert (thread != NULL);
325 if (thread->abort_state_handle) {
326 mono_gchandle_free (thread->abort_state_handle);
327 thread->abort_state_handle = 0;
329 thread->abort_exc = NULL;
330 thread->current_appcontext = NULL;
333 * This is necessary because otherwise we might have
334 * cross-domain references which will not get cleaned up when
335 * the target domain is unloaded.
337 if (thread->cached_culture_info) {
339 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
340 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
344 * thread->synch_cs can be NULL if this was called after
345 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
346 * This can happen only during shutdown.
347 * The shutting_down flag is not always set, so we can't assert on it.
349 if (thread->synch_cs)
350 LOCK_THREAD (thread);
352 thread->state |= ThreadState_Stopped;
353 thread->state &= ~ThreadState_Background;
355 if (thread->synch_cs)
356 UNLOCK_THREAD (thread);
359 An interruption request has leaked to cleanup. Adjust the global counter.
361 This can happen is the abort source thread finds the abortee (this) thread
362 in unmanaged code. If this thread never trips back to managed code or check
363 the local flag it will be left set and positively unbalance the global counter.
365 Leaving the counter unbalanced will cause a performance degradation since all threads
366 will now keep checking their local flags all the time.
368 if (InterlockedExchange (&thread->interruption_requested, 0))
369 InterlockedDecrement (&thread_interruption_requested);
371 mono_threads_lock ();
375 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
376 /* We have to check whether the thread object for the
377 * tid is still the same in the table because the
378 * thread might have been destroyed and the tid reused
379 * in the meantime, in which case the tid would be in
380 * the table, but with another thread object.
384 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
388 mono_threads_unlock ();
390 /* Don't close the handle here, wait for the object finalizer
391 * to do it. Otherwise, the following race condition applies:
393 * 1) Thread exits (and thread_cleanup() closes the handle)
395 * 2) Some other handle is reassigned the same slot
397 * 3) Another thread tries to join the first thread, and
398 * blocks waiting for the reassigned handle to be signalled
399 * (which might never happen). This is possible, because the
400 * thread calling Join() still has a reference to the first
404 /* if the thread is not in the hash it has been removed already */
406 if (thread == mono_thread_internal_current ()) {
407 mono_domain_unset ();
408 mono_memory_barrier ();
410 if (mono_thread_cleanup_fn)
411 mono_thread_cleanup_fn (thread_get_tid (thread));
414 mono_release_type_locks (thread);
416 /* Can happen when we attach the profiler helper thread in order to heapshot. */
417 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
418 mono_profiler_thread_end (thread->tid);
420 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
422 if (thread == mono_thread_internal_current ()) {
424 * This will signal async signal handlers that the thread has exited.
425 * The profiler callback needs this to be set, so it cannot be done earlier.
427 mono_domain_unset ();
428 mono_memory_barrier ();
431 if (thread == mono_thread_internal_current ())
432 mono_thread_pop_appdomain_ref ();
434 thread->cached_culture_info = NULL;
436 mono_free_static_data (thread->static_data);
437 thread->static_data = NULL;
438 ref_stack_destroy (thread->appdomain_refs);
439 thread->appdomain_refs = NULL;
441 if (mono_thread_cleanup_fn)
442 mono_thread_cleanup_fn (thread_get_tid (thread));
444 if (mono_gc_is_moving ()) {
445 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
446 thread->thread_pinning_ref = NULL;
452 * A special static data offset (guint32) consists of 3 parts:
454 * [0] 6-bit index into the array of chunks.
455 * [6] 25-bit offset into the array.
456 * [31] Bit indicating thread or context static.
461 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
472 } SpecialStaticOffset;
474 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
475 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
477 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
478 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
479 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
480 (((SpecialStaticOffset *) &(x))->fields.f)
483 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
485 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
487 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
488 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
490 return ((char *) thread->static_data [idx]) + off;
494 get_context_static_data (MonoAppContext *ctx, guint32 offset)
496 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
498 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
499 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
501 return ((char *) ctx->static_data [idx]) + off;
505 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
507 static MonoClassField *current_thread_field = NULL;
511 if (!current_thread_field) {
512 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
513 g_assert (current_thread_field);
516 mono_class_vtable (domain, mono_defaults.thread_class);
517 mono_domain_lock (domain);
518 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
519 mono_domain_unlock (domain);
522 return (MonoThread **)get_thread_static_data (thread, offset);
526 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
528 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
530 g_assert (current->obj.vtable->domain == domain);
532 g_assert (!*current_thread_ptr);
533 *current_thread_ptr = current;
537 create_thread_object (MonoDomain *domain)
540 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
541 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, &error);
542 /* only possible failure mode is OOM, from which we don't expect to recover. */
543 mono_error_assert_ok (&error);
548 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
552 thread = create_thread_object (domain);
554 MONO_OBJECT_SETREF (thread, internal_thread, internal);
559 static MonoInternalThread*
560 create_internal_thread (void)
563 MonoInternalThread *thread;
566 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
567 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
568 /* only possible failure mode is OOM, from which we don't exect to recover */
569 mono_error_assert_ok (&error);
571 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
572 mono_coop_mutex_init_recursive (thread->synch_cs);
574 thread->apartment_state = ThreadApartmentState_Unknown;
575 thread->managed_id = get_next_managed_thread_id ();
576 if (mono_gc_is_moving ()) {
577 thread->thread_pinning_ref = thread;
578 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
581 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
587 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
590 g_assert (internal->handle);
592 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
593 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
594 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
599 res = SetThreadPriority (internal->handle, priority - 2);
601 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
602 #else /* HOST_WIN32 */
605 struct sched_param param;
608 tid = thread_get_tid (internal);
610 res = pthread_getschedparam (tid, &policy, ¶m);
612 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
614 #ifdef _POSIX_PRIORITY_SCHEDULING
617 /* Necessary to get valid priority range */
619 min = sched_get_priority_min (policy);
620 max = sched_get_priority_max (policy);
622 if (max > 0 && min >= 0 && max > min) {
623 double srange, drange, sposition, dposition;
624 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
626 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
627 dposition = (sposition / srange) * drange;
628 param.sched_priority = (int)(dposition + min);
635 param.sched_priority = 50;
641 param.sched_priority = 0;
644 g_error ("%s: unknown policy %d", __func__, policy);
648 res = pthread_setschedparam (tid, policy, ¶m);
651 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
654 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
656 #endif /* HOST_WIN32 */
660 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
663 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
665 MonoThreadInfo *info;
666 MonoInternalThread *internal;
667 MonoDomain *domain, *root_domain;
671 info = mono_thread_info_current ();
673 internal = thread->internal_thread;
674 internal->handle = mono_thread_info_duplicate_handle (info);
675 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
676 internal->thread_info = info;
677 internal->small_id = info->small_id;
678 internal->stack_ptr = stack_ptr;
680 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
682 SET_CURRENT_OBJECT (internal);
684 domain = mono_object_domain (thread);
686 mono_thread_push_appdomain_ref (domain);
687 if (!mono_domain_set (domain, force_domain)) {
688 mono_thread_pop_appdomain_ref ();
692 mono_threads_lock ();
694 if (threads_starting_up)
695 mono_g_hash_table_remove (threads_starting_up, thread);
697 if (shutting_down && !force_attach) {
698 mono_threads_unlock ();
703 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
704 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
707 /* We don't need to duplicate thread->handle, because it is
708 * only closed when the thread object is finalized by the GC. */
709 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
711 /* We have to do this here because mono_thread_start_cb
712 * requires that root_domain_thread is set up. */
713 if (thread_static_info.offset || thread_static_info.idx > 0) {
714 /* get the current allocated size */
715 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
716 mono_alloc_static_data (&internal->static_data, offset, TRUE);
719 mono_threads_unlock ();
721 root_domain = mono_get_root_domain ();
723 g_assert (!internal->root_domain_thread);
724 if (domain != root_domain)
725 MONO_OBJECT_SETREF (internal, root_domain_thread, new_thread_with_internal (root_domain, internal));
727 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
729 if (domain != root_domain)
730 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
732 set_current_thread_for_domain (domain, internal, thread);
734 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
742 MonoObject *start_delegate;
743 MonoObject *start_delegate_arg;
744 MonoThreadStart start_func;
745 gpointer start_func_arg;
747 MonoCoopSem registered;
750 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
753 MonoThreadStart start_func;
754 void *start_func_arg;
757 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
761 MonoInternalThread *internal;
762 MonoObject *start_delegate;
763 MonoObject *start_delegate_arg;
766 thread = start_info->thread;
767 internal = thread->internal_thread;
768 domain = mono_object_domain (start_info->thread);
770 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
772 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
773 start_info->failed = TRUE;
775 mono_coop_sem_post (&start_info->registered);
777 if (InterlockedDecrement (&start_info->ref) == 0) {
778 mono_coop_sem_destroy (&start_info->registered);
785 mono_thread_internal_set_priority (internal, internal->priority);
789 start_delegate = start_info->start_delegate;
790 start_delegate_arg = start_info->start_delegate_arg;
791 start_func = start_info->start_func;
792 start_func_arg = start_info->start_func_arg;
794 /* This MUST be called before any managed code can be
795 * executed, as it calls the callback function that (for the
796 * jit) sets the lmf marker.
799 if (mono_thread_start_cb)
800 mono_thread_start_cb (tid, stack_ptr, start_func);
802 /* On 2.0 profile (and higher), set explicitly since state might have been
804 if (internal->apartment_state == ThreadApartmentState_Unknown)
805 internal->apartment_state = ThreadApartmentState_MTA;
807 mono_thread_init_apartment_state ();
809 /* Let the thread that called Start() know we're ready */
810 mono_coop_sem_post (&start_info->registered);
812 if (InterlockedDecrement (&start_info->ref) == 0) {
813 mono_coop_sem_destroy (&start_info->registered);
817 /* start_info is not valid anymore */
821 * Call this after calling start_notify, since the profiler callback might want
822 * to lock the thread, and the lock is held by thread_start () which waits for
825 mono_profiler_thread_start (tid);
827 /* if the name was set before starting, we didn't invoke the profiler callback */
828 if (internal->name) {
829 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
830 mono_profiler_thread_name (internal->tid, tname);
831 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
835 /* start_func is set only for unmanaged start functions */
837 start_func (start_func_arg);
841 g_assert (start_delegate != NULL);
843 /* we may want to handle the exception here. See comment below on unhandled exceptions */
844 args [0] = (gpointer) start_delegate_arg;
845 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
847 if (!mono_error_ok (&error)) {
848 MonoException *ex = mono_error_convert_to_exception (&error);
850 g_assert (ex != NULL);
851 MonoClass *klass = mono_object_get_class (&ex->object);
852 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
853 !is_threadabort_exception (klass)) {
854 mono_unhandled_exception (&ex->object);
855 mono_invoke_unhandled_exception_hook (&ex->object);
856 g_assert_not_reached ();
859 mono_error_cleanup (&error);
863 /* If the thread calls ExitThread at all, this remaining code
864 * will not be executed, but the main thread will eventually
865 * call thread_cleanup() on this thread's behalf.
868 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
870 /* Do any cleanup needed for apartment state. This
871 * cannot be done in thread_cleanup since thread_cleanup could be
872 * called for a thread other than the current thread.
873 * mono_thread_cleanup_apartment_state cleans up apartment
874 * for the current thead */
875 mono_thread_cleanup_apartment_state ();
877 thread_cleanup (internal);
881 /* Remove the reference to the thread object in the TLS data,
882 * so the thread object can be finalized. This won't be
883 * reached if the thread threw an uncaught exception, so those
884 * thread handles will stay referenced :-( (This is due to
885 * missing support for scanning thread-specific data in the
886 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
889 SET_CURRENT_OBJECT (NULL);
894 static gsize WINAPI start_wrapper(void *data)
896 volatile gsize dummy;
898 /* Avoid scanning the frames above this frame during a GC */
899 mono_gc_set_stack_end ((void*)&dummy);
901 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
907 * Common thread creation code.
908 * LOCKING: Acquires the threads lock.
911 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
912 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
914 StartInfo *start_info = NULL;
915 HANDLE thread_handle;
916 MonoNativeThreadId tid;
920 g_assert (!start_func && !start_func_arg);
922 g_assert (!start_delegate);
925 * Join joinable threads to prevent running out of threads since the finalizer
926 * thread might be blocked/backlogged.
928 mono_threads_join_threads ();
930 mono_error_init (error);
932 mono_threads_lock ();
934 mono_threads_unlock ();
937 if (threads_starting_up == NULL) {
938 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
939 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
941 mono_g_hash_table_insert (threads_starting_up, thread, thread);
942 mono_threads_unlock ();
944 internal->threadpool_thread = threadpool_thread;
945 if (threadpool_thread)
946 mono_thread_set_state (internal, ThreadState_Background);
948 start_info = g_new0 (StartInfo, 1);
950 start_info->thread = thread;
951 start_info->start_delegate = start_delegate;
952 start_info->start_delegate_arg = thread->start_obj;
953 start_info->start_func = start_func;
954 start_info->start_func_arg = start_func_arg;
955 start_info->failed = FALSE;
956 mono_coop_sem_init (&start_info->registered, 0);
959 stack_size = default_stacksize_for_thread (internal);
961 thread_handle = mono_threads_create_thread (start_wrapper, start_info, stack_size, &tid);
963 if (thread_handle == NULL) {
964 /* The thread couldn't be created, so set an exception */
965 mono_threads_lock ();
966 mono_g_hash_table_remove (threads_starting_up, thread);
967 mono_threads_unlock ();
968 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
969 /* ref is not going to be decremented in start_wrapper_internal */
970 InterlockedDecrement (&start_info->ref);
975 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
978 * Wait for the thread to set up its TLS data etc, so
979 * theres no potential race condition if someone tries
980 * to look up the data believing the thread has
984 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
986 mono_threads_close_thread_handle (thread_handle);
988 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));
990 ret = !start_info->failed;
993 if (InterlockedDecrement (&start_info->ref) == 0) {
994 mono_coop_sem_destroy (&start_info->registered);
1001 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1003 if (mono_thread_start_cb) {
1004 mono_thread_start_cb (tid, stack_start, func);
1008 void mono_threads_set_default_stacksize (guint32 stacksize)
1010 default_stacksize = stacksize;
1013 guint32 mono_threads_get_default_stacksize (void)
1015 return default_stacksize;
1019 * mono_thread_create_internal:
1021 * ARG should not be a GC reference.
1024 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
1027 MonoInternalThread *internal;
1030 mono_error_init (error);
1032 thread = create_thread_object (domain);
1034 internal = create_internal_thread ();
1036 MONO_OBJECT_SETREF (thread, internal_thread, internal);
1038 LOCK_THREAD (internal);
1040 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
1041 return_val_if_nok (error, NULL);
1043 UNLOCK_THREAD (internal);
1049 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1052 if (!mono_thread_create_checked (domain, func, arg, &error))
1053 mono_error_cleanup (&error);
1057 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1059 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
1063 mono_thread_attach (MonoDomain *domain)
1065 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1071 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1073 MonoInternalThread *internal;
1075 MonoNativeThreadId tid;
1078 if ((internal = mono_thread_internal_current ())) {
1079 if (domain != mono_domain_get ())
1080 mono_domain_set (domain, TRUE);
1081 /* Already attached */
1082 return mono_thread_current ();
1085 if (!mono_gc_register_thread (&domain)) {
1086 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 ());
1089 tid=mono_native_thread_id_get ();
1091 internal = create_internal_thread ();
1093 thread = new_thread_with_internal (domain, internal);
1095 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
1096 /* Mono is shutting down, so just wait for the end */
1098 mono_thread_info_sleep (10000, NULL);
1101 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1103 if (mono_thread_attach_cb) {
1107 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1110 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1112 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1115 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1116 if (!mono_thread_info_current ()->tools_thread)
1117 // FIXME: Need a separate callback
1118 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1124 mono_thread_detach_internal (MonoInternalThread *thread)
1126 g_return_if_fail (thread != NULL);
1128 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1130 thread_cleanup (thread);
1132 SET_CURRENT_OBJECT (NULL);
1133 mono_domain_unset ();
1135 /* Don't need to close the handle to this thread, even though we took a
1136 * reference in mono_thread_attach (), because the GC will do it
1137 * when the Thread object is finalised.
1142 mono_thread_detach (MonoThread *thread)
1145 mono_thread_detach_internal (thread->internal_thread);
1149 * mono_thread_detach_if_exiting:
1151 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1152 * This should be used at the end of embedding code which calls into managed code, and which
1153 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1156 mono_thread_detach_if_exiting (void)
1158 if (mono_thread_info_is_exiting ()) {
1159 MonoInternalThread *thread;
1161 thread = mono_thread_internal_current ();
1163 mono_thread_detach_internal (thread);
1164 mono_thread_info_detach ();
1172 mono_thread_exit (void)
1174 MonoInternalThread *thread = mono_thread_internal_current ();
1176 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1178 thread_cleanup (thread);
1179 SET_CURRENT_OBJECT (NULL);
1180 mono_domain_unset ();
1182 /* we could add a callback here for embedders to use. */
1183 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1184 exit (mono_environment_exitcode_get ());
1185 mono_thread_info_exit ();
1189 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1191 MonoInternalThread *internal;
1193 internal = create_internal_thread ();
1195 internal->state = ThreadState_Unstarted;
1197 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1201 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1205 MonoInternalThread *internal;
1208 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1210 if (!this_obj->internal_thread)
1211 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1212 internal = this_obj->internal_thread;
1214 LOCK_THREAD (internal);
1216 if ((internal->state & ThreadState_Unstarted) == 0) {
1217 UNLOCK_THREAD (internal);
1218 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1222 if ((internal->state & ThreadState_Aborted) != 0) {
1223 UNLOCK_THREAD (internal);
1227 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1229 mono_error_cleanup (&error);
1230 UNLOCK_THREAD (internal);
1234 internal->state &= ~ThreadState_Unstarted;
1236 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1238 UNLOCK_THREAD (internal);
1239 return internal->handle;
1243 * This is called from the finalizer of the internal thread object.
1246 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1248 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1251 * Since threads keep a reference to their thread object while running, by the time this function is called,
1252 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1253 * when thread_cleanup () can be called after this.
1256 mono_threads_close_thread_handle (thread);
1258 if (this_obj->synch_cs) {
1259 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1260 this_obj->synch_cs = NULL;
1261 mono_coop_mutex_destroy (synch_cs);
1265 if (this_obj->name) {
1266 void *name = this_obj->name;
1267 this_obj->name = NULL;
1273 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1276 MonoInternalThread *thread = mono_thread_internal_current ();
1278 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1280 if (mono_thread_current_check_pending_interrupt ())
1284 gboolean alerted = FALSE;
1286 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1288 res = mono_thread_info_sleep (ms, &alerted);
1290 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1293 MonoException* exc = mono_thread_execute_interruption ();
1295 mono_raise_exception (exc);
1307 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1312 ves_icall_System_Threading_Thread_GetDomainID (void)
1314 return mono_domain_get()->domain_id;
1318 ves_icall_System_Threading_Thread_Yield (void)
1320 return mono_thread_info_yield ();
1324 * mono_thread_get_name:
1326 * Return the name of the thread. NAME_LEN is set to the length of the name.
1327 * Return NULL if the thread has no name. The returned memory is owned by the
1331 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1335 LOCK_THREAD (this_obj);
1337 if (!this_obj->name) {
1341 *name_len = this_obj->name_len;
1342 res = g_new (gunichar2, this_obj->name_len);
1343 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1346 UNLOCK_THREAD (this_obj);
1352 * mono_thread_get_name_utf8:
1354 * Return the name of the thread in UTF-8.
1355 * Return NULL if the thread has no name.
1356 * The returned memory is owned by the caller.
1359 mono_thread_get_name_utf8 (MonoThread *thread)
1364 MonoInternalThread *internal = thread->internal_thread;
1365 if (internal == NULL)
1368 LOCK_THREAD (internal);
1370 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1372 UNLOCK_THREAD (internal);
1378 * mono_thread_get_managed_id:
1380 * Return the Thread.ManagedThreadId value of `thread`.
1381 * Returns -1 if `thread` is NULL.
1384 mono_thread_get_managed_id (MonoThread *thread)
1389 MonoInternalThread *internal = thread->internal_thread;
1390 if (internal == NULL)
1393 int32_t id = internal->managed_id;
1399 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1404 mono_error_init (&error);
1406 LOCK_THREAD (this_obj);
1408 if (!this_obj->name)
1411 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1413 UNLOCK_THREAD (this_obj);
1415 if (mono_error_set_pending_exception (&error))
1422 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1424 LOCK_THREAD (this_obj);
1426 mono_error_init (error);
1428 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1429 UNLOCK_THREAD (this_obj);
1431 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1434 if (this_obj->name) {
1435 g_free (this_obj->name);
1436 this_obj->name_len = 0;
1439 this_obj->name = g_new (gunichar2, mono_string_length (name));
1440 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1441 this_obj->name_len = mono_string_length (name);
1444 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1447 this_obj->name = NULL;
1450 UNLOCK_THREAD (this_obj);
1452 if (this_obj->name && this_obj->tid) {
1453 char *tname = mono_string_to_utf8_checked (name, error);
1454 return_if_nok (error);
1455 mono_profiler_thread_name (this_obj->tid, tname);
1456 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1462 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1465 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1466 mono_error_set_pending_exception (&error);
1470 * ves_icall_System_Threading_Thread_GetPriority_internal:
1471 * @param this_obj: The MonoInternalThread on which to operate.
1473 * Gets the priority of the given thread.
1474 * @return: The priority of the given thread.
1477 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1480 MonoInternalThread *internal = this_obj->internal_thread;
1482 LOCK_THREAD (internal);
1483 priority = internal->priority;
1484 UNLOCK_THREAD (internal);
1490 * ves_icall_System_Threading_Thread_SetPriority_internal:
1491 * @param this_obj: The MonoInternalThread on which to operate.
1492 * @param priority: The priority to set.
1494 * Sets the priority of the given thread.
1497 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1499 MonoInternalThread *internal = this_obj->internal_thread;
1501 LOCK_THREAD (internal);
1502 internal->priority = priority;
1503 if (internal->handle != NULL)
1504 mono_thread_internal_set_priority (internal, priority);
1505 UNLOCK_THREAD (internal);
1508 /* If the array is already in the requested domain, we just return it,
1509 otherwise we return a copy in that domain. */
1511 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1515 mono_error_init (error);
1519 if (mono_object_domain (arr) == domain)
1522 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1523 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1528 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1531 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1532 mono_error_set_pending_exception (&error);
1537 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1540 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1541 mono_error_set_pending_exception (&error);
1546 mono_thread_current (void)
1548 MonoDomain *domain = mono_domain_get ();
1549 MonoInternalThread *internal = mono_thread_internal_current ();
1550 MonoThread **current_thread_ptr;
1552 g_assert (internal);
1553 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1555 if (!*current_thread_ptr) {
1556 g_assert (domain != mono_get_root_domain ());
1557 *current_thread_ptr = new_thread_with_internal (domain, internal);
1559 return *current_thread_ptr;
1562 /* Return the thread object belonging to INTERNAL in the current domain */
1564 mono_thread_current_for_thread (MonoInternalThread *internal)
1566 MonoDomain *domain = mono_domain_get ();
1567 MonoThread **current_thread_ptr;
1569 g_assert (internal);
1570 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1572 if (!*current_thread_ptr) {
1573 g_assert (domain != mono_get_root_domain ());
1574 *current_thread_ptr = new_thread_with_internal (domain, internal);
1576 return *current_thread_ptr;
1580 mono_thread_internal_current (void)
1582 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1583 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1588 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1590 MonoInternalThread *thread = this_obj->internal_thread;
1591 HANDLE handle = thread->handle;
1592 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1595 if (mono_thread_current_check_pending_interrupt ())
1598 LOCK_THREAD (thread);
1600 if ((thread->state & ThreadState_Unstarted) != 0) {
1601 UNLOCK_THREAD (thread);
1603 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1607 UNLOCK_THREAD (thread);
1612 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1614 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1617 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1620 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1622 if(ret==WAIT_OBJECT_0) {
1623 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1628 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1633 #define MANAGED_WAIT_FAILED 0x7fffffff
1636 map_native_wait_result_to_managed (gint32 val)
1638 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1639 return val == WAIT_FAILED ? MANAGED_WAIT_FAILED : val;
1643 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1651 mono_error_init (error);
1653 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1656 if (numhandles != 1)
1657 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE);
1659 ret = WaitForSingleObjectEx (handles [0], ms, TRUE);
1662 if (ret != WAIT_IO_COMPLETION)
1665 exc = mono_thread_execute_interruption ();
1667 mono_error_set_exception_instance (error, exc);
1674 /* Re-calculate ms according to the time passed */
1675 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1676 if (diff_ms >= ms) {
1680 wait = ms - diff_ms;
1686 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1693 MonoObject *waitHandle;
1694 MonoInternalThread *thread = mono_thread_internal_current ();
1696 /* Do this WaitSleepJoin check before creating objects */
1697 if (mono_thread_current_check_pending_interrupt ())
1698 return map_native_wait_result_to_managed (WAIT_FAILED);
1700 /* We fail in managed if the array has more than 64 elements */
1701 numhandles = (guint32)mono_array_length(mono_handles);
1702 handles = g_new0(HANDLE, numhandles);
1704 for(i = 0; i < numhandles; i++) {
1705 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1706 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1713 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1715 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1717 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1721 mono_error_set_pending_exception (&error);
1723 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1724 return map_native_wait_result_to_managed (ret);
1727 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1730 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1731 uintptr_t numhandles;
1734 MonoObject *waitHandle;
1735 MonoInternalThread *thread = mono_thread_internal_current ();
1737 /* Do this WaitSleepJoin check before creating objects */
1738 if (mono_thread_current_check_pending_interrupt ())
1739 return map_native_wait_result_to_managed (WAIT_FAILED);
1741 numhandles = mono_array_length(mono_handles);
1742 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1743 return map_native_wait_result_to_managed (WAIT_FAILED);
1745 for(i = 0; i < numhandles; i++) {
1746 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1747 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1754 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1756 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1758 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1760 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1762 mono_error_set_pending_exception (&error);
1764 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1765 return map_native_wait_result_to_managed (ret);
1768 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1772 MonoInternalThread *thread = mono_thread_internal_current ();
1774 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1780 if (mono_thread_current_check_pending_interrupt ())
1781 return map_native_wait_result_to_managed (WAIT_FAILED);
1783 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1785 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1787 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1789 mono_error_set_pending_exception (&error);
1790 return map_native_wait_result_to_managed (ret);
1794 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1797 MonoInternalThread *thread = mono_thread_internal_current ();
1802 if (mono_thread_current_check_pending_interrupt ())
1803 return map_native_wait_result_to_managed (WAIT_FAILED);
1805 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1808 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1811 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1813 return map_native_wait_result_to_managed (ret);
1816 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1818 return InterlockedIncrement (location);
1821 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1823 #if SIZEOF_VOID_P == 4
1824 if (G_UNLIKELY ((size_t)location & 0x7)) {
1826 mono_interlocked_lock ();
1829 mono_interlocked_unlock ();
1833 return InterlockedIncrement64 (location);
1836 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1838 return InterlockedDecrement(location);
1841 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1843 #if SIZEOF_VOID_P == 4
1844 if (G_UNLIKELY ((size_t)location & 0x7)) {
1846 mono_interlocked_lock ();
1849 mono_interlocked_unlock ();
1853 return InterlockedDecrement64 (location);
1856 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1858 return InterlockedExchange(location, value);
1861 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1864 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1865 mono_gc_wbarrier_generic_nostore (location);
1869 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1871 return InterlockedExchangePointer(location, value);
1874 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1876 IntFloatUnion val, ret;
1879 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1885 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1887 #if SIZEOF_VOID_P == 4
1888 if (G_UNLIKELY ((size_t)location & 0x7)) {
1890 mono_interlocked_lock ();
1893 mono_interlocked_unlock ();
1897 return InterlockedExchange64 (location, value);
1901 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1903 LongDoubleUnion val, ret;
1906 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1911 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1913 return InterlockedCompareExchange(location, value, comparand);
1916 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1918 gint32 r = InterlockedCompareExchange(location, value, comparand);
1919 *success = r == comparand;
1923 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1926 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1927 mono_gc_wbarrier_generic_nostore (location);
1931 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1933 return InterlockedCompareExchangePointer(location, value, comparand);
1936 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1938 IntFloatUnion val, ret, cmp;
1941 cmp.fval = comparand;
1942 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1948 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1950 #if SIZEOF_VOID_P == 8
1951 LongDoubleUnion val, comp, ret;
1954 comp.fval = comparand;
1955 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1961 mono_interlocked_lock ();
1963 if (old == comparand)
1965 mono_interlocked_unlock ();
1972 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1974 #if SIZEOF_VOID_P == 4
1975 if (G_UNLIKELY ((size_t)location & 0x7)) {
1977 mono_interlocked_lock ();
1979 if (old == comparand)
1981 mono_interlocked_unlock ();
1985 return InterlockedCompareExchange64 (location, value, comparand);
1989 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1992 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
1993 mono_gc_wbarrier_generic_nostore (location);
1998 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2001 MONO_CHECK_NULL (location, NULL);
2002 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2003 mono_gc_wbarrier_generic_nostore (location);
2008 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2010 return InterlockedAdd (location, value);
2014 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2016 #if SIZEOF_VOID_P == 4
2017 if (G_UNLIKELY ((size_t)location & 0x7)) {
2019 mono_interlocked_lock ();
2022 mono_interlocked_unlock ();
2026 return InterlockedAdd64 (location, value);
2030 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2032 #if SIZEOF_VOID_P == 4
2033 if (G_UNLIKELY ((size_t)location & 0x7)) {
2035 mono_interlocked_lock ();
2037 mono_interlocked_unlock ();
2041 return InterlockedRead64 (location);
2045 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2047 mono_memory_barrier ();
2051 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2053 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2055 if (state & ThreadState_Background) {
2056 /* If the thread changes the background mode, the main thread has to
2057 * be notified, since it has to rebuild the list of threads to
2060 mono_w32event_set (background_change_event);
2065 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2067 mono_thread_set_state (this_obj, (MonoThreadState)state);
2069 if (state & ThreadState_Background) {
2070 /* If the thread changes the background mode, the main thread has to
2071 * be notified, since it has to rebuild the list of threads to
2074 mono_w32event_set (background_change_event);
2079 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2083 LOCK_THREAD (this_obj);
2085 state = this_obj->state;
2087 UNLOCK_THREAD (this_obj);
2092 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2094 MonoInternalThread *current;
2096 MonoInternalThread *thread = this_obj->internal_thread;
2098 LOCK_THREAD (thread);
2100 current = mono_thread_internal_current ();
2102 thread->thread_interrupt_requested = TRUE;
2103 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2105 UNLOCK_THREAD (thread);
2108 async_abort_internal (thread, FALSE);
2113 * mono_thread_current_check_pending_interrupt:
2115 * Checks if there's a interruption request and set the pending exception if so.
2117 * @returns true if a pending exception was set
2120 mono_thread_current_check_pending_interrupt (void)
2122 MonoInternalThread *thread = mono_thread_internal_current ();
2123 gboolean throw_ = FALSE;
2125 LOCK_THREAD (thread);
2127 if (thread->thread_interrupt_requested) {
2129 thread->thread_interrupt_requested = FALSE;
2132 UNLOCK_THREAD (thread);
2135 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2140 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2142 LOCK_THREAD (thread);
2144 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2145 (thread->state & ThreadState_StopRequested) != 0 ||
2146 (thread->state & ThreadState_Stopped) != 0)
2148 UNLOCK_THREAD (thread);
2152 if ((thread->state & ThreadState_Unstarted) != 0) {
2153 thread->state |= ThreadState_Aborted;
2154 UNLOCK_THREAD (thread);
2158 thread->state |= ThreadState_AbortRequested;
2159 if (thread->abort_state_handle)
2160 mono_gchandle_free (thread->abort_state_handle);
2162 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2163 g_assert (thread->abort_state_handle);
2165 thread->abort_state_handle = 0;
2167 thread->abort_exc = NULL;
2169 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));
2171 /* During shutdown, we can't wait for other threads */
2173 /* Make sure the thread is awake */
2174 mono_thread_resume (thread);
2176 UNLOCK_THREAD (thread);
2181 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2183 if (!request_thread_abort (thread, state))
2186 if (thread == mono_thread_internal_current ()) {
2188 self_abort_internal (&error);
2189 mono_error_set_pending_exception (&error);
2191 async_abort_internal (thread, TRUE);
2196 * mono_thread_internal_abort:
2198 * Request thread @thread to be aborted.
2200 * @thread MUST NOT be the current thread.
2203 mono_thread_internal_abort (MonoInternalThread *thread)
2205 g_assert (thread != mono_thread_internal_current ());
2207 if (!request_thread_abort (thread, NULL))
2209 async_abort_internal (thread, TRUE);
2213 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2215 MonoInternalThread *thread = mono_thread_internal_current ();
2216 gboolean was_aborting;
2218 LOCK_THREAD (thread);
2219 was_aborting = thread->state & ThreadState_AbortRequested;
2220 thread->state &= ~ThreadState_AbortRequested;
2221 UNLOCK_THREAD (thread);
2223 if (!was_aborting) {
2224 const char *msg = "Unable to reset abort because no abort was requested";
2225 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2228 thread->abort_exc = NULL;
2229 if (thread->abort_state_handle) {
2230 mono_gchandle_free (thread->abort_state_handle);
2231 /* This is actually not necessary - the handle
2232 only counts if the exception is set */
2233 thread->abort_state_handle = 0;
2238 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2240 LOCK_THREAD (thread);
2242 thread->state &= ~ThreadState_AbortRequested;
2244 if (thread->abort_exc) {
2245 thread->abort_exc = NULL;
2246 if (thread->abort_state_handle) {
2247 mono_gchandle_free (thread->abort_state_handle);
2248 /* This is actually not necessary - the handle
2249 only counts if the exception is set */
2250 thread->abort_state_handle = 0;
2254 UNLOCK_THREAD (thread);
2258 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2261 MonoInternalThread *thread = this_obj->internal_thread;
2262 MonoObject *state, *deserialized = NULL;
2265 if (!thread->abort_state_handle)
2268 state = mono_gchandle_get_target (thread->abort_state_handle);
2271 domain = mono_domain_get ();
2272 if (mono_object_domain (state) == domain)
2275 deserialized = mono_object_xdomain_representation (state, domain, &error);
2277 if (!deserialized) {
2278 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2279 if (!is_ok (&error)) {
2280 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2281 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2283 mono_set_pending_exception (invalid_op_exc);
2287 return deserialized;
2291 mono_thread_suspend (MonoInternalThread *thread)
2293 LOCK_THREAD (thread);
2295 if ((thread->state & ThreadState_Unstarted) != 0 ||
2296 (thread->state & ThreadState_Aborted) != 0 ||
2297 (thread->state & ThreadState_Stopped) != 0)
2299 UNLOCK_THREAD (thread);
2303 if ((thread->state & ThreadState_Suspended) != 0 ||
2304 (thread->state & ThreadState_SuspendRequested) != 0 ||
2305 (thread->state & ThreadState_StopRequested) != 0)
2307 UNLOCK_THREAD (thread);
2311 thread->state |= ThreadState_SuspendRequested;
2313 if (thread == mono_thread_internal_current ()) {
2314 /* calls UNLOCK_THREAD (thread) */
2315 self_suspend_internal ();
2317 /* calls UNLOCK_THREAD (thread) */
2318 async_suspend_internal (thread, FALSE);
2325 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2327 if (!mono_thread_suspend (this_obj->internal_thread)) {
2328 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2333 /* LOCKING: LOCK_THREAD(thread) must be held */
2335 mono_thread_resume (MonoInternalThread *thread)
2337 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2338 thread->state &= ~ThreadState_SuspendRequested;
2342 if ((thread->state & ThreadState_Suspended) == 0 ||
2343 (thread->state & ThreadState_Unstarted) != 0 ||
2344 (thread->state & ThreadState_Aborted) != 0 ||
2345 (thread->state & ThreadState_Stopped) != 0)
2350 UNLOCK_THREAD (thread);
2352 /* Awake the thread */
2353 if (!mono_thread_info_resume (thread_get_tid (thread)))
2356 LOCK_THREAD (thread);
2358 thread->state &= ~ThreadState_Suspended;
2364 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2366 if (!thread->internal_thread) {
2367 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2369 LOCK_THREAD (thread->internal_thread);
2370 if (!mono_thread_resume (thread->internal_thread))
2371 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2372 UNLOCK_THREAD (thread->internal_thread);
2377 mono_threads_is_critical_method (MonoMethod *method)
2379 switch (method->wrapper_type) {
2380 case MONO_WRAPPER_RUNTIME_INVOKE:
2381 case MONO_WRAPPER_XDOMAIN_INVOKE:
2382 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2389 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2394 if (mono_threads_is_critical_method (m)) {
2395 *((gboolean*)data) = TRUE;
2402 is_running_protected_wrapper (void)
2404 gboolean found = FALSE;
2405 mono_stack_walk (find_wrapper, &found);
2410 request_thread_stop (MonoInternalThread *thread)
2412 LOCK_THREAD (thread);
2414 if ((thread->state & ThreadState_StopRequested) != 0 ||
2415 (thread->state & ThreadState_Stopped) != 0)
2417 UNLOCK_THREAD (thread);
2421 /* Make sure the thread is awake */
2422 mono_thread_resume (thread);
2424 thread->state |= ThreadState_StopRequested;
2425 thread->state &= ~ThreadState_AbortRequested;
2427 UNLOCK_THREAD (thread);
2432 * mono_thread_internal_stop:
2434 * Request thread @thread to stop.
2436 * @thread MUST NOT be the current thread.
2439 mono_thread_internal_stop (MonoInternalThread *thread)
2441 g_assert (thread != mono_thread_internal_current ());
2443 if (!request_thread_stop (thread))
2446 async_abort_internal (thread, TRUE);
2449 void mono_thread_stop (MonoThread *thread)
2451 MonoInternalThread *internal = thread->internal_thread;
2453 if (!request_thread_stop (internal))
2456 if (internal == mono_thread_internal_current ()) {
2458 self_abort_internal (&error);
2460 This function is part of the embeding API and has no way to return the exception
2461 to be thrown. So what we do is keep the old behavior and raise the exception.
2463 mono_error_raise_exception (&error); /* OK to throw, see note */
2465 async_abort_internal (internal, TRUE);
2470 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2472 gint8 tmp = *(volatile gint8 *)ptr;
2473 mono_memory_barrier ();
2478 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2480 gint16 tmp = *(volatile gint16 *)ptr;
2481 mono_memory_barrier ();
2486 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2488 gint32 tmp = *(volatile gint32 *)ptr;
2489 mono_memory_barrier ();
2494 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2496 gint64 tmp = *(volatile gint64 *)ptr;
2497 mono_memory_barrier ();
2502 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2504 volatile void *tmp = *(volatile void **)ptr;
2505 mono_memory_barrier ();
2506 return (void *) tmp;
2510 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2512 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2513 mono_memory_barrier ();
2514 return (MonoObject *) tmp;
2518 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2520 double tmp = *(volatile double *)ptr;
2521 mono_memory_barrier ();
2526 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2528 float tmp = *(volatile float *)ptr;
2529 mono_memory_barrier ();
2534 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2536 return InterlockedRead8 ((volatile gint8 *)ptr);
2540 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2542 return InterlockedRead16 ((volatile gint16 *)ptr);
2546 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2548 return InterlockedRead ((volatile gint32 *)ptr);
2552 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2554 #if SIZEOF_VOID_P == 4
2555 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2557 mono_interlocked_lock ();
2558 val = *(gint64*)ptr;
2559 mono_interlocked_unlock ();
2563 return InterlockedRead64 ((volatile gint64 *)ptr);
2567 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2569 return InterlockedReadPointer ((volatile gpointer *)ptr);
2573 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2577 #if SIZEOF_VOID_P == 4
2578 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2580 mono_interlocked_lock ();
2581 val = *(double*)ptr;
2582 mono_interlocked_unlock ();
2587 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2593 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2597 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2603 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2605 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2609 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2611 mono_memory_barrier ();
2612 *(volatile gint8 *)ptr = value;
2616 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2618 mono_memory_barrier ();
2619 *(volatile gint16 *)ptr = value;
2623 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2625 mono_memory_barrier ();
2626 *(volatile gint32 *)ptr = value;
2630 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2632 mono_memory_barrier ();
2633 *(volatile gint64 *)ptr = value;
2637 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2639 mono_memory_barrier ();
2640 *(volatile void **)ptr = value;
2644 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2646 mono_memory_barrier ();
2647 mono_gc_wbarrier_generic_store (ptr, value);
2651 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2653 mono_memory_barrier ();
2654 *(volatile double *)ptr = value;
2658 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2660 mono_memory_barrier ();
2661 *(volatile float *)ptr = value;
2665 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2667 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2671 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2673 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2677 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2679 InterlockedWrite ((volatile gint32 *)ptr, value);
2683 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2685 #if SIZEOF_VOID_P == 4
2686 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2687 mono_interlocked_lock ();
2688 *(gint64*)ptr = value;
2689 mono_interlocked_unlock ();
2694 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2698 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2700 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2704 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2708 #if SIZEOF_VOID_P == 4
2709 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2710 mono_interlocked_lock ();
2711 *(double*)ptr = value;
2712 mono_interlocked_unlock ();
2719 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2723 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2729 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2733 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2735 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2739 free_context (void *user_data)
2741 ContextStaticData *data = user_data;
2743 mono_threads_lock ();
2746 * There is no guarantee that, by the point this reference queue callback
2747 * has been invoked, the GC handle associated with the object will fail to
2748 * resolve as one might expect. So if we don't free and remove the GC
2749 * handle here, free_context_static_data_helper () could end up resolving
2750 * a GC handle to an actually-dead context which would contain a pointer
2751 * to an already-freed static data segment, resulting in a crash when
2754 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2756 mono_threads_unlock ();
2758 mono_gchandle_free (data->gc_handle);
2759 mono_free_static_data (data->static_data);
2764 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2766 mono_threads_lock ();
2768 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2771 contexts = g_hash_table_new (NULL, NULL);
2774 context_queue = mono_gc_reference_queue_new (free_context);
2776 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2777 g_hash_table_insert (contexts, gch, gch);
2780 * We use this intermediate structure to contain a duplicate pointer to
2781 * the static data because we can't rely on being able to resolve the GC
2782 * handle in the reference queue callback.
2784 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2785 data->gc_handle = GPOINTER_TO_UINT (gch);
2788 context_adjust_static_data (ctx);
2789 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2791 mono_threads_unlock ();
2793 mono_profiler_context_loaded (ctx);
2797 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2800 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2801 * cleanup in exceptional circumstances, we don't actually do any
2802 * cleanup work here. We instead do this via a reference queue.
2805 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2807 mono_profiler_context_unloaded (ctx);
2811 mono_thread_init_tls (void)
2813 MONO_FAST_TLS_INIT (tls_current_object);
2814 mono_native_tls_alloc (¤t_object_key, NULL);
2817 void mono_thread_init (MonoThreadStartCB start_cb,
2818 MonoThreadAttachCB attach_cb)
2820 mono_coop_mutex_init_recursive (&threads_mutex);
2822 mono_os_mutex_init_recursive(&interlocked_mutex);
2823 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2825 background_change_event = mono_w32event_create (TRUE, FALSE);
2826 g_assert(background_change_event != NULL);
2828 mono_init_static_data_info (&thread_static_info);
2829 mono_init_static_data_info (&context_static_info);
2831 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2833 mono_thread_start_cb = start_cb;
2834 mono_thread_attach_cb = attach_cb;
2836 /* Get a pseudo handle to the current process. This is just a
2837 * kludge so that wapi can build a process handle if needed.
2838 * As a pseudo handle is returned, we don't need to clean
2841 GetCurrentProcess ();
2844 void mono_thread_cleanup (void)
2846 #if !defined(RUN_IN_SUBTHREAD)
2847 /* The main thread must abandon any held mutexes (particularly
2848 * important for named mutexes as they are shared across
2849 * processes, see bug 74680.) This will happen when the
2850 * thread exits, but if it's not running in a subthread it
2851 * won't exit in time.
2853 mono_thread_info_set_exited (mono_thread_info_current ());
2857 /* This stuff needs more testing, it seems one of these
2858 * critical sections can be locked when mono_thread_cleanup is
2861 mono_coop_mutex_destroy (&threads_mutex);
2862 mono_os_mutex_destroy (&interlocked_mutex);
2863 mono_os_mutex_destroy (&delayed_free_table_mutex);
2864 mono_os_mutex_destroy (&small_id_mutex);
2865 CloseHandle (background_change_event);
2868 mono_native_tls_free (current_object_key);
2872 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2874 mono_thread_cleanup_fn = func;
2878 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2880 thread->internal_thread->manage_callback = func;
2884 static void print_tids (gpointer key, gpointer value, gpointer user)
2886 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2887 * sizeof(uint) and a cast to uint would overflow
2889 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2890 * print this as a pointer.
2892 g_message ("Waiting for: %p", key);
2897 HANDLE handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2898 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2903 wait_for_tids (struct wait_data *wait, guint32 timeout)
2907 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2910 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2913 if(ret==WAIT_FAILED) {
2914 /* See the comment in build_wait_tids() */
2915 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2919 for(i=0; i<wait->num; i++)
2920 mono_threads_close_thread_handle (wait->handles [i]);
2922 if (ret == WAIT_TIMEOUT)
2925 for(i=0; i<wait->num; i++) {
2926 gsize tid = wait->threads[i]->tid;
2929 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2930 * it can still run io-layer etc. code. So wait for it to really exit.
2931 * FIXME: This won't join threads which are not in the joinable_hash yet.
2933 mono_thread_join ((gpointer)tid);
2935 mono_threads_lock ();
2936 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2937 /* This thread must have been killed, because
2938 * it hasn't cleaned itself up. (It's just
2939 * possible that the thread exited before the
2940 * parent thread had a chance to store the
2941 * handle, and now there is another pointer to
2942 * the already-exited thread stored. In this
2943 * case, we'll just get two
2944 * mono_profiler_thread_end() calls for the
2948 mono_threads_unlock ();
2949 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2950 thread_cleanup (wait->threads[i]);
2952 mono_threads_unlock ();
2957 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2959 guint32 i, ret, count;
2961 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2963 /* Add the thread state change event, so it wakes up if a thread changes
2964 * to background mode.
2967 if (count < MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
2968 wait->handles [count] = background_change_event;
2973 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2976 if(ret==WAIT_FAILED) {
2977 /* See the comment in build_wait_tids() */
2978 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2982 for(i=0; i<wait->num; i++)
2983 mono_threads_close_thread_handle (wait->handles [i]);
2985 if (ret == WAIT_TIMEOUT)
2988 if (ret < wait->num) {
2989 gsize tid = wait->threads[ret]->tid;
2990 mono_threads_lock ();
2991 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2992 /* See comment in wait_for_tids about thread cleanup */
2993 mono_threads_unlock ();
2994 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2995 thread_cleanup (wait->threads [ret]);
2997 mono_threads_unlock ();
3001 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3003 struct wait_data *wait=(struct wait_data *)user;
3005 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3007 MonoInternalThread *thread=(MonoInternalThread *)value;
3009 /* Ignore background threads, we abort them later */
3010 /* Do not lock here since it is not needed and the caller holds threads_lock */
3011 if (thread->state & ThreadState_Background) {
3012 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3013 return; /* just leave, ignore */
3016 if (mono_gc_is_finalizer_internal_thread (thread)) {
3017 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3021 if (thread == mono_thread_internal_current ()) {
3022 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3026 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3027 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3031 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3032 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3036 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3037 if (handle == NULL) {
3038 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3042 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3043 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3044 wait->handles[wait->num]=handle;
3045 wait->threads[wait->num]=thread;
3048 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3050 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3055 /* Just ignore the rest, we can't do anything with
3062 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3064 struct wait_data *wait=(struct wait_data *)user;
3065 MonoNativeThreadId self = mono_native_thread_id_get ();
3066 MonoInternalThread *thread = (MonoInternalThread *)value;
3069 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3072 /* The finalizer thread is not a background thread */
3073 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3074 && (thread->state & ThreadState_Background) != 0
3075 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3077 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3081 wait->handles[wait->num] = handle;
3082 wait->threads[wait->num] = thread;
3085 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3086 mono_thread_internal_abort (thread);
3090 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3091 && !mono_gc_is_finalizer_internal_thread (thread);
3095 * mono_threads_set_shutting_down:
3097 * Is called by a thread that wants to shut down Mono. If the runtime is already
3098 * shutting down, the calling thread is suspended/stopped, and this function never
3102 mono_threads_set_shutting_down (void)
3104 MonoInternalThread *current_thread = mono_thread_internal_current ();
3106 mono_threads_lock ();
3108 if (shutting_down) {
3109 mono_threads_unlock ();
3111 /* Make sure we're properly suspended/stopped */
3113 LOCK_THREAD (current_thread);
3115 if ((current_thread->state & ThreadState_SuspendRequested) ||
3116 (current_thread->state & ThreadState_AbortRequested) ||
3117 (current_thread->state & ThreadState_StopRequested)) {
3118 UNLOCK_THREAD (current_thread);
3119 mono_thread_execute_interruption ();
3121 current_thread->state |= ThreadState_Stopped;
3122 UNLOCK_THREAD (current_thread);
3125 /*since we're killing the thread, unset the current domain.*/
3126 mono_domain_unset ();
3128 /* Wake up other threads potentially waiting for us */
3129 mono_thread_info_exit ();
3131 shutting_down = TRUE;
3133 /* Not really a background state change, but this will
3134 * interrupt the main thread if it is waiting for all
3135 * the other threads.
3137 mono_w32event_set (background_change_event);
3139 mono_threads_unlock ();
3143 void mono_thread_manage (void)
3145 struct wait_data wait_data;
3146 struct wait_data *wait = &wait_data;
3148 memset (wait, 0, sizeof (struct wait_data));
3149 /* join each thread that's still running */
3150 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3152 mono_threads_lock ();
3154 THREAD_DEBUG (g_message("%s: No threads", __func__));
3155 mono_threads_unlock ();
3158 mono_threads_unlock ();
3161 mono_threads_lock ();
3162 if (shutting_down) {
3163 /* somebody else is shutting down */
3164 mono_threads_unlock ();
3167 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3168 mono_g_hash_table_foreach (threads, print_tids, NULL));
3170 mono_w32event_reset (background_change_event);
3172 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3173 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3174 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3175 mono_threads_unlock ();
3177 /* Something to wait for */
3178 wait_for_tids_or_state_change (wait, INFINITE);
3180 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3181 } while(wait->num>0);
3183 /* Mono is shutting down, so just wait for the end */
3184 if (!mono_runtime_try_shutdown ()) {
3185 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3186 mono_thread_suspend (mono_thread_internal_current ());
3187 mono_thread_execute_interruption ();
3191 * Remove everything but the finalizer thread and self.
3192 * Also abort all the background threads
3195 mono_threads_lock ();
3198 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3199 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3200 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3202 mono_threads_unlock ();
3204 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3206 /* Something to wait for */
3207 wait_for_tids (wait, INFINITE);
3209 } while (wait->num > 0);
3212 * give the subthreads a chance to really quit (this is mainly needed
3213 * to get correct user and system times from getrusage/wait/time(1)).
3214 * This could be removed if we avoid pthread_detach() and use pthread_join().
3216 mono_thread_info_yield ();
3220 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3222 MonoInternalThread *thread = (MonoInternalThread*)value;
3223 struct wait_data *wait = (struct wait_data*)user_data;
3227 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3229 * This needs no locking.
3231 if ((thread->state & ThreadState_Suspended) != 0 ||
3232 (thread->state & ThreadState_Stopped) != 0)
3235 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3236 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3240 wait->handles [wait->num] = handle;
3241 wait->threads [wait->num] = thread;
3247 * mono_thread_suspend_all_other_threads:
3249 * Suspend all managed threads except the finalizer thread and this thread. It is
3250 * not possible to resume them later.
3252 void mono_thread_suspend_all_other_threads (void)
3254 struct wait_data wait_data;
3255 struct wait_data *wait = &wait_data;
3257 MonoNativeThreadId self = mono_native_thread_id_get ();
3258 guint32 eventidx = 0;
3259 gboolean starting, finished;
3261 memset (wait, 0, sizeof (struct wait_data));
3263 * The other threads could be in an arbitrary state at this point, i.e.
3264 * they could be starting up, shutting down etc. This means that there could be
3265 * threads which are not even in the threads hash table yet.
3269 * First we set a barrier which will be checked by all threads before they
3270 * are added to the threads hash table, and they will exit if the flag is set.
3271 * This ensures that no threads could be added to the hash later.
3272 * We will use shutting_down as the barrier for now.
3274 g_assert (shutting_down);
3277 * We make multiple calls to WaitForMultipleObjects since:
3278 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3279 * - some threads could exit without becoming suspended
3284 * Make a copy of the hashtable since we can't do anything with
3285 * threads while threads_mutex is held.
3288 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3289 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3290 mono_threads_lock ();
3291 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3292 mono_threads_unlock ();
3295 /* Get the suspended events that we'll be waiting for */
3296 for (i = 0; i < wait->num; ++i) {
3297 MonoInternalThread *thread = wait->threads [i];
3299 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3300 || mono_gc_is_finalizer_internal_thread (thread)
3301 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3303 //mono_threads_close_thread_handle (wait->handles [i]);
3304 wait->threads [i] = NULL; /* ignore this thread in next loop */
3308 LOCK_THREAD (thread);
3310 if ((thread->state & ThreadState_Suspended) != 0 ||
3311 (thread->state & ThreadState_StopRequested) != 0 ||
3312 (thread->state & ThreadState_Stopped) != 0) {
3313 UNLOCK_THREAD (thread);
3314 mono_threads_close_thread_handle (wait->handles [i]);
3315 wait->threads [i] = NULL; /* ignore this thread in next loop */
3321 /* Convert abort requests into suspend requests */
3322 if ((thread->state & ThreadState_AbortRequested) != 0)
3323 thread->state &= ~ThreadState_AbortRequested;
3325 thread->state |= ThreadState_SuspendRequested;
3327 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3328 async_suspend_internal (thread, TRUE);
3330 if (eventidx <= 0) {
3332 * If there are threads which are starting up, we wait until they
3333 * are suspended when they try to register in the threads hash.
3334 * This is guaranteed to finish, since the threads which can create new
3335 * threads get suspended after a while.
3336 * FIXME: The finalizer thread can still create new threads.
3338 mono_threads_lock ();
3339 if (threads_starting_up)
3340 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3343 mono_threads_unlock ();
3345 mono_thread_info_sleep (100, NULL);
3353 MonoInternalThread *thread;
3354 MonoStackFrameInfo *frames;
3355 int nframes, max_frames;
3356 int nthreads, max_threads;
3357 MonoInternalThread **threads;
3358 } ThreadDumpUserData;
3360 static gboolean thread_dump_requested;
3362 /* This needs to be async safe */
3364 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3366 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3368 if (ud->nframes < ud->max_frames) {
3369 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3376 /* This needs to be async safe */
3377 static SuspendThreadResult
3378 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3380 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3381 MonoInternalThread *thread = user_data->thread;
3384 /* This no longer works with remote unwinding */
3385 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3386 mono_thread_info_describe (info, text);
3387 g_string_append (text, "\n");
3390 if (thread == mono_thread_internal_current ())
3391 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3393 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3395 return MonoResumeThread;
3399 int nthreads, max_threads;
3400 MonoInternalThread **threads;
3401 } CollectThreadsUserData;
3404 collect_thread (gpointer key, gpointer value, gpointer user)
3406 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3407 MonoInternalThread *thread = (MonoInternalThread *)value;
3409 if (ud->nthreads < ud->max_threads)
3410 ud->threads [ud->nthreads ++] = thread;
3414 * Collect running threads into the THREADS array.
3415 * THREADS should be an array allocated on the stack.
3418 collect_threads (MonoInternalThread **thread_array, int max_threads)
3420 CollectThreadsUserData ud;
3422 memset (&ud, 0, sizeof (ud));
3423 /* This array contains refs, but its on the stack, so its ok */
3424 ud.threads = thread_array;
3425 ud.max_threads = max_threads;
3427 mono_threads_lock ();
3428 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3429 mono_threads_unlock ();
3435 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3437 GString* text = g_string_new (0);
3439 GError *error = NULL;
3442 ud->thread = thread;
3445 /* Collect frames for the thread */
3446 if (thread == mono_thread_internal_current ()) {
3447 get_thread_dump (mono_thread_info_current (), ud);
3449 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3453 * Do all the non async-safe work outside of get_thread_dump.
3456 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3458 g_string_append_printf (text, "\n\"%s\"", name);
3461 else if (thread->threadpool_thread) {
3462 g_string_append (text, "\n\"<threadpool thread>\"");
3464 g_string_append (text, "\n\"<unnamed thread>\"");
3467 for (i = 0; i < ud->nframes; ++i) {
3468 MonoStackFrameInfo *frame = &ud->frames [i];
3469 MonoMethod *method = NULL;
3471 if (frame->type == FRAME_TYPE_MANAGED)
3472 method = mono_jit_info_get_method (frame->ji);
3475 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3476 g_string_append_printf (text, " %s\n", location);
3479 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3483 fprintf (stdout, "%s", text->str);
3485 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3486 OutputDebugStringA(text->str);
3489 g_string_free (text, TRUE);
3494 mono_threads_perform_thread_dump (void)
3496 ThreadDumpUserData ud;
3497 MonoInternalThread *thread_array [128];
3498 int tindex, nthreads;
3500 if (!thread_dump_requested)
3503 printf ("Full thread dump:\n");
3505 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3506 nthreads = collect_threads (thread_array, 128);
3508 memset (&ud, 0, sizeof (ud));
3509 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3510 ud.max_frames = 256;
3512 for (tindex = 0; tindex < nthreads; ++tindex)
3513 dump_thread (thread_array [tindex], &ud);
3517 thread_dump_requested = FALSE;
3520 /* Obtain the thread dump of all threads */
3522 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3525 ThreadDumpUserData ud;
3526 MonoInternalThread *thread_array [128];
3527 MonoDomain *domain = mono_domain_get ();
3528 MonoDebugSourceLocation *location;
3529 int tindex, nthreads;
3531 mono_error_init (error);
3533 *out_threads = NULL;
3534 *out_stack_frames = NULL;
3536 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3537 nthreads = collect_threads (thread_array, 128);
3539 memset (&ud, 0, sizeof (ud));
3540 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3541 ud.max_frames = 256;
3543 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3546 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3550 for (tindex = 0; tindex < nthreads; ++tindex) {
3551 MonoInternalThread *thread = thread_array [tindex];
3552 MonoArray *thread_frames;
3558 /* Collect frames for the thread */
3559 if (thread == mono_thread_internal_current ()) {
3560 get_thread_dump (mono_thread_info_current (), &ud);
3562 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3565 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3567 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3570 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3572 for (i = 0; i < ud.nframes; ++i) {
3573 MonoStackFrameInfo *frame = &ud.frames [i];
3574 MonoMethod *method = NULL;
3575 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3579 sf->native_offset = frame->native_offset;
3581 if (frame->type == FRAME_TYPE_MANAGED)
3582 method = mono_jit_info_get_method (frame->ji);
3585 sf->method_address = (gsize) frame->ji->code_start;
3587 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3590 MONO_OBJECT_SETREF (sf, method, rm);
3592 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3594 sf->il_offset = location->il_offset;
3596 if (location && location->source_file) {
3597 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3598 sf->line = location->row;
3599 sf->column = location->column;
3601 mono_debug_free_source_location (location);
3606 mono_array_setref (thread_frames, i, sf);
3612 return is_ok (error);
3616 * mono_threads_request_thread_dump:
3618 * Ask all threads except the current to print their stacktrace to stdout.
3621 mono_threads_request_thread_dump (void)
3623 /*The new thread dump code runs out of the finalizer thread. */
3624 thread_dump_requested = TRUE;
3625 mono_gc_finalize_notify ();
3630 gint allocated; /* +1 so that refs [allocated] == NULL */
3634 typedef struct ref_stack RefStack;
3637 ref_stack_new (gint initial_size)
3641 initial_size = MAX (initial_size, 16) + 1;
3642 rs = g_new0 (RefStack, 1);
3643 rs->refs = g_new0 (gpointer, initial_size);
3644 rs->allocated = initial_size;
3649 ref_stack_destroy (gpointer ptr)
3651 RefStack *rs = (RefStack *)ptr;
3660 ref_stack_push (RefStack *rs, gpointer ptr)
3662 g_assert (rs != NULL);
3664 if (rs->bottom >= rs->allocated) {
3665 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3666 rs->allocated <<= 1;
3667 rs->refs [rs->allocated] = NULL;
3669 rs->refs [rs->bottom++] = ptr;
3673 ref_stack_pop (RefStack *rs)
3675 if (rs == NULL || rs->bottom == 0)
3679 rs->refs [rs->bottom] = NULL;
3683 ref_stack_find (RefStack *rs, gpointer ptr)
3690 for (refs = rs->refs; refs && *refs; refs++) {
3698 * mono_thread_push_appdomain_ref:
3700 * Register that the current thread may have references to objects in domain
3701 * @domain on its stack. Each call to this function should be paired with a
3702 * call to pop_appdomain_ref.
3705 mono_thread_push_appdomain_ref (MonoDomain *domain)
3707 MonoInternalThread *thread = mono_thread_internal_current ();
3710 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3711 SPIN_LOCK (thread->lock_thread_id);
3712 if (thread->appdomain_refs == NULL)
3713 thread->appdomain_refs = ref_stack_new (16);
3714 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3715 SPIN_UNLOCK (thread->lock_thread_id);
3720 mono_thread_pop_appdomain_ref (void)
3722 MonoInternalThread *thread = mono_thread_internal_current ();
3725 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3726 SPIN_LOCK (thread->lock_thread_id);
3727 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3728 SPIN_UNLOCK (thread->lock_thread_id);
3733 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3736 SPIN_LOCK (thread->lock_thread_id);
3737 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3738 SPIN_UNLOCK (thread->lock_thread_id);
3743 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3745 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3748 typedef struct abort_appdomain_data {
3749 struct wait_data wait;
3751 } abort_appdomain_data;
3754 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3756 MonoInternalThread *thread = (MonoInternalThread*)value;
3757 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3758 MonoDomain *domain = data->domain;
3760 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3761 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3763 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3764 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3767 data->wait.handles [data->wait.num] = handle;
3768 data->wait.threads [data->wait.num] = thread;
3771 /* Just ignore the rest, we can't do anything with
3779 * mono_threads_abort_appdomain_threads:
3781 * Abort threads which has references to the given appdomain.
3784 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3786 #ifdef __native_client__
3790 abort_appdomain_data user_data;
3792 int orig_timeout = timeout;
3795 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3797 start_time = mono_msec_ticks ();
3799 mono_threads_lock ();
3801 user_data.domain = domain;
3802 user_data.wait.num = 0;
3803 /* This shouldn't take any locks */
3804 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3805 mono_threads_unlock ();
3807 if (user_data.wait.num > 0) {
3808 /* Abort the threads outside the threads lock */
3809 for (i = 0; i < user_data.wait.num; ++i)
3810 mono_thread_internal_abort (user_data.wait.threads [i]);
3813 * We should wait for the threads either to abort, or to leave the
3814 * domain. We can't do the latter, so we wait with a timeout.
3816 wait_for_tids (&user_data.wait, 100);
3819 /* Update remaining time */
3820 timeout -= mono_msec_ticks () - start_time;
3821 start_time = mono_msec_ticks ();
3823 if (orig_timeout != -1 && timeout < 0)
3826 while (user_data.wait.num > 0);
3828 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3834 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3836 MonoInternalThread *thread = (MonoInternalThread*)value;
3837 MonoDomain *domain = (MonoDomain*)user_data;
3840 /* No locking needed here */
3841 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3843 if (thread->cached_culture_info) {
3844 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3845 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3846 if (obj && obj->vtable->domain == domain)
3847 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3853 * mono_threads_clear_cached_culture:
3855 * Clear the cached_current_culture from all threads if it is in the
3859 mono_threads_clear_cached_culture (MonoDomain *domain)
3861 mono_threads_lock ();
3862 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3863 mono_threads_unlock ();
3867 * mono_thread_get_undeniable_exception:
3869 * Return an exception which needs to be raised when leaving a catch clause.
3870 * This is used for undeniable exception propagation.
3873 mono_thread_get_undeniable_exception (void)
3875 MonoInternalThread *thread = mono_thread_internal_current ();
3877 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3879 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3880 * exception if the thread no longer references a dying appdomain.
3882 thread->abort_exc->trace_ips = NULL;
3883 thread->abort_exc->stack_trace = NULL;
3884 return thread->abort_exc;
3890 #if MONO_SMALL_CONFIG
3891 #define NUM_STATIC_DATA_IDX 4
3892 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3896 #define NUM_STATIC_DATA_IDX 8
3897 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3898 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3902 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3903 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3906 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3908 gpointer *static_data = (gpointer *)addr;
3910 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3911 void **ptr = (void **)static_data [i];
3916 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3917 void **p = ptr + idx;
3920 mark_func ((MonoObject**)p, gc_data);
3926 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3928 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3932 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3934 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3938 * mono_alloc_static_data
3940 * Allocate memory blocks for storing threads or context static data
3943 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3945 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3948 gpointer* static_data = *static_data_ptr;
3950 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3951 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3953 if (mono_gc_user_markers_supported ()) {
3954 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3955 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3957 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3958 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3961 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3962 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3963 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3964 *static_data_ptr = static_data;
3965 static_data [0] = static_data;
3968 for (i = 1; i <= idx; ++i) {
3969 if (static_data [i])
3972 if (mono_gc_user_markers_supported ())
3973 static_data [i] = g_malloc0 (static_data_size [i]);
3975 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3976 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3977 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3982 mono_free_static_data (gpointer* static_data)
3985 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3986 gpointer p = static_data [i];
3990 * At this point, the static data pointer array is still registered with the
3991 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3992 * data. Freeing the individual arrays without first nulling their slots
3993 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3994 * such an already freed array. See bug #13813.
3996 static_data [i] = NULL;
3997 mono_memory_write_barrier ();
3998 if (mono_gc_user_markers_supported ())
4001 mono_gc_free_fixed (p);
4003 mono_gc_free_fixed (static_data);
4007 * mono_init_static_data_info
4009 * Initializes static data counters
4011 static void mono_init_static_data_info (StaticDataInfo *static_data)
4013 static_data->idx = 0;
4014 static_data->offset = 0;
4015 static_data->freelist = NULL;
4019 * mono_alloc_static_data_slot
4021 * Generates an offset for static data. static_data contains the counters
4022 * used to generate it.
4025 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4027 if (!static_data->idx && !static_data->offset) {
4029 * we use the first chunk of the first allocation also as
4030 * an array for the rest of the data
4032 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4034 static_data->offset += align - 1;
4035 static_data->offset &= ~(align - 1);
4036 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4037 static_data->idx ++;
4038 g_assert (size <= static_data_size [static_data->idx]);
4039 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4040 static_data->offset = 0;
4042 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4043 static_data->offset += size;
4048 * LOCKING: requires that threads_mutex is held
4051 context_adjust_static_data (MonoAppContext *ctx)
4053 if (context_static_info.offset || context_static_info.idx > 0) {
4054 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4055 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4056 ctx->data->static_data = ctx->static_data;
4061 * LOCKING: requires that threads_mutex is held
4064 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4066 MonoInternalThread *thread = (MonoInternalThread *)value;
4067 guint32 offset = GPOINTER_TO_UINT (user);
4069 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4073 * LOCKING: requires that threads_mutex is held
4076 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4078 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4083 guint32 offset = GPOINTER_TO_UINT (user);
4084 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4085 ctx->data->static_data = ctx->static_data;
4088 static StaticDataFreeList*
4089 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4091 StaticDataFreeList* prev = NULL;
4092 StaticDataFreeList* tmp = static_data->freelist;
4094 if (tmp->size == size) {
4096 prev->next = tmp->next;
4098 static_data->freelist = tmp->next;
4107 #if SIZEOF_VOID_P == 4
4114 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4116 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4118 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4119 MonoBitSet *rb = sets [idx];
4120 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4121 offset /= sizeof (uintptr_t);
4122 /* offset is now the bitmap offset */
4123 for (int i = 0; i < numbits; ++i) {
4124 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4125 mono_bitset_set_fast (rb, offset + i);
4130 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4132 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4133 MonoBitSet *rb = sets [idx];
4134 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4135 offset /= sizeof (uintptr_t);
4136 /* offset is now the bitmap offset */
4137 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4138 mono_bitset_clear_fast (rb, offset + i);
4142 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4144 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4146 StaticDataInfo *info;
4149 if (static_type == SPECIAL_STATIC_THREAD) {
4150 info = &thread_static_info;
4151 sets = thread_reference_bitmaps;
4153 info = &context_static_info;
4154 sets = context_reference_bitmaps;
4157 mono_threads_lock ();
4159 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4163 offset = item->offset;
4166 offset = mono_alloc_static_data_slot (info, size, align);
4169 update_reference_bitmap (sets, offset, bitmap, numbits);
4171 if (static_type == SPECIAL_STATIC_THREAD) {
4172 /* This can be called during startup */
4173 if (threads != NULL)
4174 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4176 if (contexts != NULL)
4177 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4179 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4182 mono_threads_unlock ();
4188 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4190 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4192 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4193 return get_thread_static_data (thread, offset);
4195 return get_context_static_data (thread->current_appcontext, offset);
4200 mono_get_special_static_data (guint32 offset)
4202 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4211 * LOCKING: requires that threads_mutex is held
4214 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4216 MonoInternalThread *thread = (MonoInternalThread *)value;
4217 OffsetSize *data = (OffsetSize *)user;
4218 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4219 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4222 if (!thread->static_data || !thread->static_data [idx])
4224 ptr = ((char*) thread->static_data [idx]) + off;
4225 mono_gc_bzero_atomic (ptr, data->size);
4229 * LOCKING: requires that threads_mutex is held
4232 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4234 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4239 OffsetSize *data = (OffsetSize *)user;
4240 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4241 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4244 if (!ctx->static_data || !ctx->static_data [idx])
4247 ptr = ((char*) ctx->static_data [idx]) + off;
4248 mono_gc_bzero_atomic (ptr, data->size);
4252 do_free_special_slot (guint32 offset, guint32 size)
4254 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4256 StaticDataInfo *info;
4258 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4259 info = &thread_static_info;
4260 sets = thread_reference_bitmaps;
4262 info = &context_static_info;
4263 sets = context_reference_bitmaps;
4266 guint32 data_offset = offset;
4267 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4268 OffsetSize data = { data_offset, size };
4270 clear_reference_bitmap (sets, data.offset, data.size);
4272 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4273 if (threads != NULL)
4274 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4276 if (contexts != NULL)
4277 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4280 if (!mono_runtime_is_shutting_down ()) {
4281 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4283 item->offset = offset;
4286 item->next = info->freelist;
4287 info->freelist = item;
4292 do_free_special (gpointer key, gpointer value, gpointer data)
4294 MonoClassField *field = (MonoClassField *)key;
4295 guint32 offset = GPOINTER_TO_UINT (value);
4298 size = mono_type_size (field->type, &align);
4299 do_free_special_slot (offset, size);
4303 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4305 mono_threads_lock ();
4307 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4309 mono_threads_unlock ();
4313 static void CALLBACK dummy_apc (ULONG_PTR param)
4319 * mono_thread_execute_interruption
4321 * Performs the operation that the requested thread state requires (abort,
4324 static MonoException*
4325 mono_thread_execute_interruption (void)
4327 MonoInternalThread *thread = mono_thread_internal_current ();
4328 MonoThread *sys_thread = mono_thread_current ();
4330 LOCK_THREAD (thread);
4332 /* MonoThread::interruption_requested can only be changed with atomics */
4333 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4334 /* this will consume pending APC calls */
4336 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4338 InterlockedDecrement (&thread_interruption_requested);
4340 /* Clear the interrupted flag of the thread so it can wait again */
4341 mono_thread_info_clear_self_interrupt ();
4344 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4345 if (sys_thread->pending_exception) {
4348 exc = sys_thread->pending_exception;
4349 sys_thread->pending_exception = NULL;
4351 UNLOCK_THREAD (thread);
4353 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4354 UNLOCK_THREAD (thread);
4355 g_assert (sys_thread->pending_exception == NULL);
4356 if (thread->abort_exc == NULL) {
4358 * This might be racy, but it has to be called outside the lock
4359 * since it calls managed code.
4361 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4363 return thread->abort_exc;
4365 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4366 /* calls UNLOCK_THREAD (thread) */
4367 self_suspend_internal ();
4370 else if ((thread->state & ThreadState_StopRequested) != 0) {
4371 /* FIXME: do this through the JIT? */
4373 UNLOCK_THREAD (thread);
4375 mono_thread_exit ();
4377 } else if (thread->thread_interrupt_requested) {
4379 thread->thread_interrupt_requested = FALSE;
4380 UNLOCK_THREAD (thread);
4382 return(mono_get_exception_thread_interrupted ());
4385 UNLOCK_THREAD (thread);
4391 * mono_thread_request_interruption
4393 * A signal handler can call this method to request the interruption of a
4394 * thread. The result of the interruption will depend on the current state of
4395 * the thread. If the result is an exception that needs to be throw, it is
4396 * provided as return value.
4399 mono_thread_request_interruption (gboolean running_managed)
4401 MonoInternalThread *thread = mono_thread_internal_current ();
4403 /* The thread may already be stopping */
4408 if (thread->interrupt_on_stop &&
4409 thread->state & ThreadState_StopRequested &&
4410 thread->state & ThreadState_Background)
4413 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4415 InterlockedIncrement (&thread_interruption_requested);
4417 if (!running_managed || is_running_protected_wrapper ()) {
4418 /* Can't stop while in unmanaged code. Increase the global interruption
4419 request count. When exiting the unmanaged method the count will be
4420 checked and the thread will be interrupted. */
4422 /* this will awake the thread if it is in WaitForSingleObject
4424 /* Our implementation of this function ignores the func argument */
4426 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4428 mono_thread_info_self_interrupt ();
4433 return mono_thread_execute_interruption ();
4437 /*This function should be called by a thread after it has exited all of
4438 * its handle blocks at interruption time.*/
4440 mono_thread_resume_interruption (void)
4442 MonoInternalThread *thread = mono_thread_internal_current ();
4443 gboolean still_aborting;
4445 /* The thread may already be stopping */
4449 LOCK_THREAD (thread);
4450 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4451 UNLOCK_THREAD (thread);
4453 /*This can happen if the protected block called Thread::ResetAbort*/
4454 if (!still_aborting)
4457 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4459 InterlockedIncrement (&thread_interruption_requested);
4461 mono_thread_info_self_interrupt ();
4463 return mono_thread_execute_interruption ();
4466 gboolean mono_thread_interruption_requested ()
4468 if (thread_interruption_requested) {
4469 MonoInternalThread *thread = mono_thread_internal_current ();
4470 /* The thread may already be stopping */
4472 return (thread->interruption_requested);
4477 static MonoException*
4478 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4480 MonoInternalThread *thread = mono_thread_internal_current ();
4482 /* The thread may already be stopping */
4486 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4487 MonoException* exc = mono_thread_execute_interruption ();
4495 * Performs the interruption of the current thread, if one has been requested,
4496 * and the thread is not running a protected wrapper.
4497 * Return the exception which needs to be thrown, if any.
4500 mono_thread_interruption_checkpoint (void)
4502 return mono_thread_interruption_checkpoint_request (FALSE);
4506 * Performs the interruption of the current thread, if one has been requested.
4507 * Return the exception which needs to be thrown, if any.
4510 mono_thread_force_interruption_checkpoint_noraise (void)
4512 return mono_thread_interruption_checkpoint_request (TRUE);
4516 * mono_set_pending_exception:
4518 * Set the pending exception of the current thread to EXC.
4519 * The exception will be thrown when execution returns to managed code.
4522 mono_set_pending_exception (MonoException *exc)
4524 MonoThread *thread = mono_thread_current ();
4526 /* The thread may already be stopping */
4530 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4532 mono_thread_request_interruption (FALSE);
4536 * mono_thread_interruption_request_flag:
4538 * Returns the address of a flag that will be non-zero if an interruption has
4539 * been requested for a thread. The thread to interrupt may not be the current
4540 * thread, so an additional call to mono_thread_interruption_requested() or
4541 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4544 gint32* mono_thread_interruption_request_flag ()
4546 return &thread_interruption_requested;
4550 mono_thread_init_apartment_state (void)
4553 MonoInternalThread* thread = mono_thread_internal_current ();
4555 /* Positive return value indicates success, either
4556 * S_OK if this is first CoInitialize call, or
4557 * S_FALSE if CoInitialize already called, but with same
4558 * threading model. A negative value indicates failure,
4559 * probably due to trying to change the threading model.
4561 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4562 ? COINIT_APARTMENTTHREADED
4563 : COINIT_MULTITHREADED) < 0) {
4564 thread->apartment_state = ThreadApartmentState_Unknown;
4570 mono_thread_cleanup_apartment_state (void)
4573 MonoInternalThread* thread = mono_thread_internal_current ();
4575 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4582 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4584 LOCK_THREAD (thread);
4585 thread->state |= state;
4586 UNLOCK_THREAD (thread);
4590 * mono_thread_test_and_set_state:
4592 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4594 * Returns TRUE is @set was OR'd in.
4597 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4599 LOCK_THREAD (thread);
4601 if ((thread->state & test) != 0) {
4602 UNLOCK_THREAD (thread);
4606 thread->state |= set;
4607 UNLOCK_THREAD (thread);
4613 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4615 LOCK_THREAD (thread);
4616 thread->state &= ~state;
4617 UNLOCK_THREAD (thread);
4621 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4623 gboolean ret = FALSE;
4625 LOCK_THREAD (thread);
4627 if ((thread->state & test) != 0) {
4631 UNLOCK_THREAD (thread);
4636 static gboolean has_tls_get = FALSE;
4639 mono_runtime_set_has_tls_get (gboolean val)
4645 mono_runtime_has_tls_get (void)
4651 self_interrupt_thread (void *_unused)
4653 MonoThreadInfo *info = mono_thread_info_current ();
4654 MonoException *exc = mono_thread_execute_interruption ();
4655 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4656 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. */
4657 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4661 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4665 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4669 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4671 MonoJitInfo **dest = (MonoJitInfo **)data;
4677 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4679 MonoJitInfo *ji = NULL;
4684 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4685 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4686 * where we hold runtime locks.
4688 if (!mono_threads_is_coop_enabled ())
4689 mono_thread_info_set_is_async_context (TRUE);
4690 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4691 if (!mono_threads_is_coop_enabled ())
4692 mono_thread_info_set_is_async_context (FALSE);
4697 MonoInternalThread *thread;
4698 gboolean install_async_abort;
4699 MonoThreadInfoInterruptToken *interrupt_token;
4702 static SuspendThreadResult
4703 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4705 AbortThreadData *data = (AbortThreadData *)ud;
4706 MonoInternalThread *thread = data->thread;
4707 MonoJitInfo *ji = NULL;
4708 gboolean protected_wrapper;
4709 gboolean running_managed;
4711 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4712 return MonoResumeThread;
4715 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4716 The protected block code will give them a chance when appropriate.
4718 if (thread->abort_protected_block_count)
4719 return MonoResumeThread;
4721 /*someone is already interrupting it*/
4722 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4723 return MonoResumeThread;
4725 InterlockedIncrement (&thread_interruption_requested);
4727 ji = mono_thread_info_get_last_managed (info);
4728 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4729 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4731 if (!protected_wrapper && running_managed) {
4732 /*We are in managed code*/
4733 /*Set the thread to call */
4734 if (data->install_async_abort)
4735 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4736 return MonoResumeThread;
4739 * This will cause waits to be broken.
4740 * It will also prevent the thread from entering a wait, so if the thread returns
4741 * from the wait before it receives the abort signal, it will just spin in the wait
4742 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4745 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4747 return MonoResumeThread;
4752 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4754 AbortThreadData data;
4756 g_assert (thread != mono_thread_internal_current ());
4758 data.thread = thread;
4759 data.install_async_abort = install_async_abort;
4760 data.interrupt_token = NULL;
4762 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4763 if (data.interrupt_token)
4764 mono_thread_info_finish_interrupt (data.interrupt_token);
4765 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4769 self_abort_internal (MonoError *error)
4773 mono_error_init (error);
4775 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4776 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4779 Self aborts ignore the protected block logic and raise the TAE regardless. This is verified by one of the tests in mono/tests/abort-cctor.cs.
4781 exc = mono_thread_request_interruption (TRUE);
4783 mono_error_set_exception_instance (error, exc);
4785 mono_thread_info_self_interrupt ();
4789 MonoInternalThread *thread;
4791 MonoThreadInfoInterruptToken *interrupt_token;
4792 } SuspendThreadData;
4794 static SuspendThreadResult
4795 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4797 SuspendThreadData *data = (SuspendThreadData *)ud;
4798 MonoInternalThread *thread = data->thread;
4799 MonoJitInfo *ji = NULL;
4800 gboolean protected_wrapper;
4801 gboolean running_managed;
4803 ji = mono_thread_info_get_last_managed (info);
4804 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4805 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4807 if (running_managed && !protected_wrapper) {
4808 thread->state &= ~ThreadState_SuspendRequested;
4809 thread->state |= ThreadState_Suspended;
4810 return KeepSuspended;
4812 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4813 InterlockedIncrement (&thread_interruption_requested);
4814 if (data->interrupt)
4815 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4817 return MonoResumeThread;
4821 /* LOCKING: called with @thread synch_cs held, and releases it */
4823 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4825 SuspendThreadData data;
4827 g_assert (thread != mono_thread_internal_current ());
4829 data.thread = thread;
4830 data.interrupt = interrupt;
4831 data.interrupt_token = NULL;
4833 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4834 if (data.interrupt_token)
4835 mono_thread_info_finish_interrupt (data.interrupt_token);
4837 UNLOCK_THREAD (thread);
4840 /* LOCKING: called with @thread synch_cs held, and releases it */
4842 self_suspend_internal (void)
4844 MonoInternalThread *thread;
4846 thread = mono_thread_internal_current ();
4848 mono_thread_info_begin_self_suspend ();
4849 thread->state &= ~ThreadState_SuspendRequested;
4850 thread->state |= ThreadState_Suspended;
4852 UNLOCK_THREAD (thread);
4854 mono_thread_info_end_self_suspend ();
4858 * mono_thread_is_foreign:
4859 * @thread: the thread to query
4861 * This function allows one to determine if a thread was created by the mono runtime and has
4862 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4864 * Returns: TRUE if @thread was not created by the runtime.
4867 mono_thread_is_foreign (MonoThread *thread)
4869 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4870 return info->runtime_thread == FALSE;
4874 * mono_add_joinable_thread:
4876 * Add TID to the list of joinable threads.
4877 * LOCKING: Acquires the threads lock.
4880 mono_threads_add_joinable_thread (gpointer tid)
4884 * We cannot detach from threads because it causes problems like
4885 * 2fd16f60/r114307. So we collect them and join them when
4886 * we have time (in he finalizer thread).
4888 joinable_threads_lock ();
4889 if (!joinable_threads)
4890 joinable_threads = g_hash_table_new (NULL, NULL);
4891 g_hash_table_insert (joinable_threads, tid, tid);
4892 joinable_thread_count ++;
4893 joinable_threads_unlock ();
4895 mono_gc_finalize_notify ();
4900 * mono_threads_join_threads:
4902 * Join all joinable threads. This is called from the finalizer thread.
4903 * LOCKING: Acquires the threads lock.
4906 mono_threads_join_threads (void)
4909 GHashTableIter iter;
4916 if (!joinable_thread_count)
4920 joinable_threads_lock ();
4922 if (g_hash_table_size (joinable_threads)) {
4923 g_hash_table_iter_init (&iter, joinable_threads);
4924 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4925 thread = (pthread_t)tid;
4926 g_hash_table_remove (joinable_threads, key);
4927 joinable_thread_count --;
4930 joinable_threads_unlock ();
4932 if (thread != pthread_self ()) {
4934 /* This shouldn't block */
4935 pthread_join (thread, NULL);
4948 * Wait for thread TID to exit.
4949 * LOCKING: Acquires the threads lock.
4952 mono_thread_join (gpointer tid)
4956 gboolean found = FALSE;
4958 joinable_threads_lock ();
4959 if (!joinable_threads)
4960 joinable_threads = g_hash_table_new (NULL, NULL);
4961 if (g_hash_table_lookup (joinable_threads, tid)) {
4962 g_hash_table_remove (joinable_threads, tid);
4963 joinable_thread_count --;
4966 joinable_threads_unlock ();
4969 thread = (pthread_t)tid;
4971 pthread_join (thread, NULL);
4977 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4979 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4980 mono_thread_interruption_checkpoint ();
4984 mono_thread_internal_unhandled_exception (MonoObject* exc)
4986 MonoClass *klass = exc->vtable->klass;
4987 if (is_threadabort_exception (klass)) {
4988 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4989 } else if (!is_appdomainunloaded_exception (klass)
4990 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4991 mono_unhandled_exception (exc);
4992 if (mono_environment_exitcode_get () == 1) {
4993 mono_environment_exitcode_set (255);
4994 mono_invoke_unhandled_exception_hook (exc);
4995 g_assert_not_reached ();
5001 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5004 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5005 mono_error_set_pending_exception (&error);
5009 * mono_threads_attach_coop: called by native->managed wrappers
5013 * - @return: the original domain which needs to be restored, or NULL.
5016 * - @dummy: contains the original domain
5017 * - @return: a cookie containing current MonoThreadInfo*.
5020 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5023 gboolean fresh_thread = FALSE;
5026 /* Happens when called from AOTed code which is only used in the root domain. */
5027 domain = mono_get_root_domain ();
5032 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5033 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5034 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5035 * we're only responsible for making the cookie. */
5036 if (mono_threads_is_coop_enabled ()) {
5037 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5038 fresh_thread = !info || !mono_thread_info_is_live (info);
5041 if (!mono_thread_internal_current ()) {
5042 mono_thread_attach_full (domain, FALSE);
5045 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5048 orig = mono_domain_get ();
5050 mono_domain_set (domain, TRUE);
5052 if (!mono_threads_is_coop_enabled ())
5053 return orig != domain ? orig : NULL;
5057 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5058 * return the right cookie. */
5059 return mono_threads_enter_gc_unsafe_region_cookie ();
5062 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5063 return mono_threads_enter_gc_unsafe_region (dummy);
5068 * mono_threads_detach_coop: called by native->managed wrappers
5071 * - @cookie: the original domain which needs to be restored, or NULL.
5075 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5076 * - @dummy: contains the original domain
5079 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5081 MonoDomain *domain, *orig;
5083 if (!mono_threads_is_coop_enabled ()) {
5084 orig = (MonoDomain*) cookie;
5086 mono_domain_set (orig, TRUE);
5088 orig = (MonoDomain*) *dummy;
5090 domain = mono_domain_get ();
5093 /* it won't do anything if cookie is NULL
5094 * thread state RUNNING -> (RUNNING|BLOCKING) */
5095 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5097 if (orig != domain) {
5099 mono_domain_unset ();
5101 mono_domain_set (orig, TRUE);
5107 mono_threads_begin_abort_protected_block (void)
5109 MonoInternalThread *thread;
5111 thread = mono_thread_internal_current ();
5112 ++thread->abort_protected_block_count;
5113 mono_memory_barrier ();
5117 mono_threads_end_abort_protected_block (void)
5119 MonoInternalThread *thread;
5121 thread = mono_thread_internal_current ();
5123 mono_memory_barrier ();
5124 --thread->abort_protected_block_count;
5128 mono_thread_try_resume_interruption (void)
5130 MonoInternalThread *thread;
5132 thread = mono_thread_internal_current ();
5133 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5136 return mono_thread_resume_interruption ();
5139 /* Returns TRUE if the current thread is ready to be interrupted. */
5141 mono_threads_is_ready_to_be_interrupted (void)
5143 MonoInternalThread *thread;
5145 thread = mono_thread_internal_current ();
5146 LOCK_THREAD (thread);
5147 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5148 UNLOCK_THREAD (thread);
5152 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5153 UNLOCK_THREAD (thread);
5157 UNLOCK_THREAD (thread);