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/os-event.h>
48 #include <mono/utils/mono-threads-debug.h>
49 #include <mono/metadata/w32handle.h>
50 #include <mono/metadata/w32event.h>
51 #include <mono/metadata/w32mutex.h>
53 #include <mono/metadata/gc-internals.h>
54 #include <mono/metadata/reflection-internals.h>
55 #include <mono/metadata/abi-details.h>
61 #if defined(HOST_WIN32)
65 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
66 #define USE_TKILL_ON_ANDROID 1
69 #ifdef PLATFORM_ANDROID
72 #ifdef USE_TKILL_ON_ANDROID
73 extern int tkill (pid_t tid, int signal);
77 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
78 #define THREAD_DEBUG(a)
79 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
80 #define THREAD_WAIT_DEBUG(a)
81 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
82 #define LIBGC_DEBUG(a)
84 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
85 #define SPIN_LOCK(i) do { \
86 if (SPIN_TRYLOCK (i)) \
90 #define SPIN_UNLOCK(i) i = 0
92 #define LOCK_THREAD(thread) lock_thread((thread))
93 #define UNLOCK_THREAD(thread) unlock_thread((thread))
105 typedef struct _StaticDataFreeList StaticDataFreeList;
106 struct _StaticDataFreeList {
107 StaticDataFreeList *next;
115 StaticDataFreeList *freelist;
118 /* Number of cached culture objects in the MonoThread->cached_culture_info array
119 * (per-type): we use the first NUM entries for CultureInfo and the last for
120 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
122 #define NUM_CACHED_CULTURES 4
123 #define CULTURES_START_IDX 0
124 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
126 /* Controls access to the 'threads' hash table */
127 static void mono_threads_lock (void);
128 static void mono_threads_unlock (void);
129 static MonoCoopMutex threads_mutex;
131 /* Controls access to the 'joinable_threads' hash table */
132 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
133 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
134 static mono_mutex_t joinable_threads_mutex;
136 /* Holds current status of static data heap */
137 static StaticDataInfo thread_static_info;
138 static StaticDataInfo context_static_info;
140 /* The hash of existing threads (key is thread ID, value is
141 * MonoInternalThread*) that need joining before exit
143 static MonoGHashTable *threads=NULL;
145 /* List of app context GC handles.
146 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
148 static GHashTable *contexts = NULL;
150 /* Cleanup queue for contexts. */
151 static MonoReferenceQueue *context_queue;
154 * Threads which are starting up and they are not in the 'threads' hash yet.
155 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
156 * Protected by mono_threads_lock ().
158 static MonoGHashTable *threads_starting_up = NULL;
160 /* The TLS key that holds the MonoObject assigned to each thread */
161 static MonoNativeTlsKey current_object_key;
164 /* Protected by the threads lock */
165 static GHashTable *joinable_threads;
166 static int joinable_thread_count;
168 #ifdef MONO_HAVE_FAST_TLS
169 /* we need to use both the Tls* functions and __thread because
170 * the gc needs to see all the threads
172 MONO_FAST_TLS_DECLARE(tls_current_object);
173 #define SET_CURRENT_OBJECT(x) do { \
174 MONO_FAST_TLS_SET (tls_current_object, x); \
175 mono_native_tls_set_value (current_object_key, x); \
177 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
179 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
180 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
183 /* function called at thread start */
184 static MonoThreadStartCB mono_thread_start_cb = NULL;
186 /* function called at thread attach */
187 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
189 /* function called at thread cleanup */
190 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
192 /* The default stack size for each thread */
193 static guint32 default_stacksize = 0;
194 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
196 static void context_adjust_static_data (MonoAppContext *ctx);
197 static void mono_free_static_data (gpointer* static_data);
198 static void mono_init_static_data_info (StaticDataInfo *static_data);
199 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
200 static gboolean mono_thread_resume (MonoInternalThread* thread);
201 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
202 static void self_abort_internal (MonoError *error);
203 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
204 static void self_suspend_internal (void);
206 static MonoException* mono_thread_execute_interruption (void);
207 static void ref_stack_destroy (gpointer rs);
209 /* Spin lock for InterlockedXXX 64 bit functions */
210 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
211 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
212 static mono_mutex_t interlocked_mutex;
214 /* global count of thread interruptions requested */
215 static gint32 thread_interruption_requested = 0;
217 /* Event signaled when a thread changes its background mode */
218 static MonoOSEvent background_change_event;
220 static gboolean shutting_down = FALSE;
222 static gint32 managed_thread_id_counter = 0;
224 /* Class lazy loading functions */
225 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
228 mono_threads_lock (void)
230 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
234 mono_threads_unlock (void)
236 mono_locks_coop_release (&threads_mutex, ThreadsLock);
241 get_next_managed_thread_id (void)
243 return InterlockedIncrement (&managed_thread_id_counter);
247 mono_thread_get_tls_key (void)
249 return current_object_key;
253 mono_thread_get_tls_offset (void)
258 if (current_object_key)
259 offset = current_object_key;
261 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
266 static inline MonoNativeThreadId
267 thread_get_tid (MonoInternalThread *thread)
269 /* We store the tid as a guint64 to keep the object layout constant between platforms */
270 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
273 static void ensure_synch_cs_set (MonoInternalThread *thread)
275 MonoCoopMutex *synch_cs;
277 if (thread->synch_cs != NULL) {
281 synch_cs = g_new0 (MonoCoopMutex, 1);
282 mono_coop_mutex_init_recursive (synch_cs);
284 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
285 synch_cs, NULL) != NULL) {
286 /* Another thread must have installed this CS */
287 mono_coop_mutex_destroy (synch_cs);
293 lock_thread (MonoInternalThread *thread)
295 if (!thread->synch_cs)
296 ensure_synch_cs_set (thread);
298 g_assert (thread->synch_cs);
300 mono_coop_mutex_lock (thread->synch_cs);
304 unlock_thread (MonoInternalThread *thread)
306 mono_coop_mutex_unlock (thread->synch_cs);
309 static inline gboolean
310 is_appdomainunloaded_exception (MonoClass *klass)
312 return klass == mono_class_get_appdomain_unloaded_exception_class ();
315 static inline gboolean
316 is_threadabort_exception (MonoClass *klass)
318 return klass == mono_defaults.threadabortexception_class;
322 * NOTE: this function can be called also for threads different from the current one:
323 * make sure no code called from it will ever assume it is run on the thread that is
324 * getting cleaned up.
326 static void thread_cleanup (MonoInternalThread *thread)
330 g_assert (thread != NULL);
332 if (thread->abort_state_handle) {
333 mono_gchandle_free (thread->abort_state_handle);
334 thread->abort_state_handle = 0;
336 thread->abort_exc = NULL;
337 thread->current_appcontext = NULL;
340 * This is necessary because otherwise we might have
341 * cross-domain references which will not get cleaned up when
342 * the target domain is unloaded.
344 if (thread->cached_culture_info) {
346 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
347 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
351 * thread->synch_cs can be NULL if this was called after
352 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
353 * This can happen only during shutdown.
354 * The shutting_down flag is not always set, so we can't assert on it.
356 if (thread->synch_cs)
357 LOCK_THREAD (thread);
359 thread->state |= ThreadState_Stopped;
360 thread->state &= ~ThreadState_Background;
362 if (thread->synch_cs)
363 UNLOCK_THREAD (thread);
366 An interruption request has leaked to cleanup. Adjust the global counter.
368 This can happen is the abort source thread finds the abortee (this) thread
369 in unmanaged code. If this thread never trips back to managed code or check
370 the local flag it will be left set and positively unbalance the global counter.
372 Leaving the counter unbalanced will cause a performance degradation since all threads
373 will now keep checking their local flags all the time.
375 if (InterlockedExchange (&thread->interruption_requested, 0))
376 InterlockedDecrement (&thread_interruption_requested);
378 mono_threads_lock ();
382 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
383 /* We have to check whether the thread object for the
384 * tid is still the same in the table because the
385 * thread might have been destroyed and the tid reused
386 * in the meantime, in which case the tid would be in
387 * the table, but with another thread object.
391 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
395 mono_threads_unlock ();
397 /* Don't close the handle here, wait for the object finalizer
398 * to do it. Otherwise, the following race condition applies:
400 * 1) Thread exits (and thread_cleanup() closes the handle)
402 * 2) Some other handle is reassigned the same slot
404 * 3) Another thread tries to join the first thread, and
405 * blocks waiting for the reassigned handle to be signalled
406 * (which might never happen). This is possible, because the
407 * thread calling Join() still has a reference to the first
411 /* if the thread is not in the hash it has been removed already */
413 if (thread == mono_thread_internal_current ()) {
414 mono_domain_unset ();
415 mono_memory_barrier ();
417 if (mono_thread_cleanup_fn)
418 mono_thread_cleanup_fn (thread_get_tid (thread));
421 mono_release_type_locks (thread);
423 /* Can happen when we attach the profiler helper thread in order to heapshot. */
424 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
425 mono_profiler_thread_end (thread->tid);
427 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
429 if (thread == mono_thread_internal_current ()) {
431 * This will signal async signal handlers that the thread has exited.
432 * The profiler callback needs this to be set, so it cannot be done earlier.
434 mono_domain_unset ();
435 mono_memory_barrier ();
438 if (thread == mono_thread_internal_current ())
439 mono_thread_pop_appdomain_ref ();
441 thread->cached_culture_info = NULL;
443 mono_free_static_data (thread->static_data);
444 thread->static_data = NULL;
445 ref_stack_destroy (thread->appdomain_refs);
446 thread->appdomain_refs = NULL;
448 if (mono_thread_cleanup_fn)
449 mono_thread_cleanup_fn (thread_get_tid (thread));
451 if (mono_gc_is_moving ()) {
452 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
453 thread->thread_pinning_ref = NULL;
456 g_assert (thread->suspended);
457 mono_os_event_destroy (thread->suspended);
458 g_free (thread->suspended);
459 thread->suspended = NULL;
463 * A special static data offset (guint32) consists of 3 parts:
465 * [0] 6-bit index into the array of chunks.
466 * [6] 25-bit offset into the array.
467 * [31] Bit indicating thread or context static.
472 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
483 } SpecialStaticOffset;
485 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
486 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
488 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
489 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
490 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
491 (((SpecialStaticOffset *) &(x))->fields.f)
494 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
496 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
498 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
499 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
501 return ((char *) thread->static_data [idx]) + off;
505 get_context_static_data (MonoAppContext *ctx, guint32 offset)
507 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
509 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
510 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
512 return ((char *) ctx->static_data [idx]) + off;
516 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
518 static MonoClassField *current_thread_field = NULL;
522 if (!current_thread_field) {
523 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
524 g_assert (current_thread_field);
527 mono_class_vtable (domain, mono_defaults.thread_class);
528 mono_domain_lock (domain);
529 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
530 mono_domain_unlock (domain);
533 return (MonoThread **)get_thread_static_data (thread, offset);
537 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
539 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
541 g_assert (current->obj.vtable->domain == domain);
543 g_assert (!*current_thread_ptr);
544 *current_thread_ptr = current;
548 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
554 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
557 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
558 /* only possible failure mode is OOM, from which we don't expect to recover. */
559 mono_error_assert_ok (&error);
561 MONO_OBJECT_SETREF (thread, internal_thread, internal);
566 static MonoInternalThread*
567 create_internal_thread_object (void)
570 MonoInternalThread *thread;
573 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
574 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
575 /* only possible failure mode is OOM, from which we don't exect to recover */
576 mono_error_assert_ok (&error);
578 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
579 mono_coop_mutex_init_recursive (thread->synch_cs);
581 thread->apartment_state = ThreadApartmentState_Unknown;
582 thread->managed_id = get_next_managed_thread_id ();
583 if (mono_gc_is_moving ()) {
584 thread->thread_pinning_ref = thread;
585 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
588 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
590 thread->suspended = g_new0 (MonoOSEvent, 1);
591 mono_os_event_init (thread->suspended, TRUE);
597 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
601 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
602 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
603 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
608 g_assert (internal->native_handle);
610 res = SetThreadPriority (internal->native_handle, priority - 2);
612 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
613 #else /* HOST_WIN32 */
616 struct sched_param param;
619 tid = thread_get_tid (internal);
621 res = pthread_getschedparam (tid, &policy, ¶m);
623 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
625 #ifdef _POSIX_PRIORITY_SCHEDULING
628 /* Necessary to get valid priority range */
630 min = sched_get_priority_min (policy);
631 max = sched_get_priority_max (policy);
633 if (max > 0 && min >= 0 && max > min) {
634 double srange, drange, sposition, dposition;
635 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
637 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
638 dposition = (sposition / srange) * drange;
639 param.sched_priority = (int)(dposition + min);
646 param.sched_priority = 50;
652 param.sched_priority = 0;
655 g_error ("%s: unknown policy %d", __func__, policy);
659 res = pthread_setschedparam (tid, policy, ¶m);
662 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
665 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
667 #endif /* HOST_WIN32 */
671 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
674 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
676 MonoThreadInfo *info;
677 MonoInternalThread *internal;
678 MonoDomain *domain, *root_domain;
682 info = mono_thread_info_current ();
684 internal = thread->internal_thread;
685 internal->handle = mono_threads_open_thread_handle (info->handle);
687 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
689 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
690 internal->thread_info = info;
691 internal->small_id = info->small_id;
692 internal->stack_ptr = stack_ptr;
694 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
696 SET_CURRENT_OBJECT (internal);
698 domain = mono_object_domain (thread);
700 mono_thread_push_appdomain_ref (domain);
701 if (!mono_domain_set (domain, force_domain)) {
702 mono_thread_pop_appdomain_ref ();
706 mono_threads_lock ();
708 if (threads_starting_up)
709 mono_g_hash_table_remove (threads_starting_up, thread);
711 if (shutting_down && !force_attach) {
712 mono_threads_unlock ();
717 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
718 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
721 /* We don't need to duplicate thread->handle, because it is
722 * only closed when the thread object is finalized by the GC. */
723 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
725 /* We have to do this here because mono_thread_start_cb
726 * requires that root_domain_thread is set up. */
727 if (thread_static_info.offset || thread_static_info.idx > 0) {
728 /* get the current allocated size */
729 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
730 mono_alloc_static_data (&internal->static_data, offset, TRUE);
733 mono_threads_unlock ();
735 root_domain = mono_get_root_domain ();
737 g_assert (!internal->root_domain_thread);
738 if (domain != root_domain)
739 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
741 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
743 if (domain != root_domain)
744 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
746 set_current_thread_for_domain (domain, internal, thread);
748 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
756 MonoObject *start_delegate;
757 MonoObject *start_delegate_arg;
758 MonoThreadStart start_func;
759 gpointer start_func_arg;
761 MonoCoopSem registered;
764 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
767 MonoThreadStart start_func;
768 void *start_func_arg;
771 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
775 MonoInternalThread *internal;
776 MonoObject *start_delegate;
777 MonoObject *start_delegate_arg;
780 thread = start_info->thread;
781 internal = thread->internal_thread;
782 domain = mono_object_domain (start_info->thread);
784 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
786 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
787 start_info->failed = TRUE;
789 mono_coop_sem_post (&start_info->registered);
791 if (InterlockedDecrement (&start_info->ref) == 0) {
792 mono_coop_sem_destroy (&start_info->registered);
799 mono_thread_internal_set_priority (internal, internal->priority);
803 start_delegate = start_info->start_delegate;
804 start_delegate_arg = start_info->start_delegate_arg;
805 start_func = start_info->start_func;
806 start_func_arg = start_info->start_func_arg;
808 /* This MUST be called before any managed code can be
809 * executed, as it calls the callback function that (for the
810 * jit) sets the lmf marker.
813 if (mono_thread_start_cb)
814 mono_thread_start_cb (tid, stack_ptr, start_func);
816 /* On 2.0 profile (and higher), set explicitly since state might have been
818 if (internal->apartment_state == ThreadApartmentState_Unknown)
819 internal->apartment_state = ThreadApartmentState_MTA;
821 mono_thread_init_apartment_state ();
823 /* Let the thread that called Start() know we're ready */
824 mono_coop_sem_post (&start_info->registered);
826 if (InterlockedDecrement (&start_info->ref) == 0) {
827 mono_coop_sem_destroy (&start_info->registered);
831 /* start_info is not valid anymore */
835 * Call this after calling start_notify, since the profiler callback might want
836 * to lock the thread, and the lock is held by thread_start () which waits for
839 mono_profiler_thread_start (tid);
841 /* if the name was set before starting, we didn't invoke the profiler callback */
842 if (internal->name) {
843 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
844 mono_profiler_thread_name (internal->tid, tname);
845 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
849 /* start_func is set only for unmanaged start functions */
851 start_func (start_func_arg);
855 g_assert (start_delegate != NULL);
857 /* we may want to handle the exception here. See comment below on unhandled exceptions */
858 args [0] = (gpointer) start_delegate_arg;
859 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
861 if (!mono_error_ok (&error)) {
862 MonoException *ex = mono_error_convert_to_exception (&error);
864 g_assert (ex != NULL);
865 MonoClass *klass = mono_object_get_class (&ex->object);
866 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
867 !is_threadabort_exception (klass)) {
868 mono_unhandled_exception (&ex->object);
869 mono_invoke_unhandled_exception_hook (&ex->object);
870 g_assert_not_reached ();
873 mono_error_cleanup (&error);
877 /* If the thread calls ExitThread at all, this remaining code
878 * will not be executed, but the main thread will eventually
879 * call thread_cleanup() on this thread's behalf.
882 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
884 /* Do any cleanup needed for apartment state. This
885 * cannot be done in thread_cleanup since thread_cleanup could be
886 * called for a thread other than the current thread.
887 * mono_thread_cleanup_apartment_state cleans up apartment
888 * for the current thead */
889 mono_thread_cleanup_apartment_state ();
891 mono_thread_detach_internal (internal);
898 static gsize WINAPI start_wrapper(void *data)
900 volatile gsize dummy;
902 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
908 * Common thread creation code.
909 * LOCKING: Acquires the threads lock.
912 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
913 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
915 StartInfo *start_info = NULL;
916 MonoThreadHandle *thread_handle;
917 MonoNativeThreadId tid;
919 gsize stack_set_size;
922 g_assert (!start_func && !start_func_arg);
924 g_assert (!start_delegate);
927 * Join joinable threads to prevent running out of threads since the finalizer
928 * thread might be blocked/backlogged.
930 mono_threads_join_threads ();
932 mono_error_init (error);
934 mono_threads_lock ();
936 mono_threads_unlock ();
939 if (threads_starting_up == NULL) {
940 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
941 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
943 mono_g_hash_table_insert (threads_starting_up, thread, thread);
944 mono_threads_unlock ();
946 internal->threadpool_thread = threadpool_thread;
947 if (threadpool_thread)
948 mono_thread_set_state (internal, ThreadState_Background);
950 start_info = g_new0 (StartInfo, 1);
952 start_info->thread = thread;
953 start_info->start_delegate = start_delegate;
954 start_info->start_delegate_arg = thread->start_obj;
955 start_info->start_func = start_func;
956 start_info->start_func_arg = start_func_arg;
957 start_info->failed = FALSE;
958 mono_coop_sem_init (&start_info->registered, 0);
961 stack_set_size = default_stacksize_for_thread (internal);
965 thread_handle = mono_threads_create_thread (start_wrapper, start_info, &stack_set_size, &tid);
967 if (thread_handle == NULL) {
968 /* The thread couldn't be created, so set an exception */
969 mono_threads_lock ();
970 mono_g_hash_table_remove (threads_starting_up, thread);
971 mono_threads_unlock ();
972 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
973 /* ref is not going to be decremented in start_wrapper_internal */
974 InterlockedDecrement (&start_info->ref);
979 internal->stack_size = (int) stack_set_size;
981 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
984 * Wait for the thread to set up its TLS data etc, so
985 * theres no potential race condition if someone tries
986 * to look up the data believing the thread has
990 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
992 mono_threads_close_thread_handle (thread_handle);
994 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));
996 ret = !start_info->failed;
999 if (InterlockedDecrement (&start_info->ref) == 0) {
1000 mono_coop_sem_destroy (&start_info->registered);
1001 g_free (start_info);
1007 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1009 if (mono_thread_start_cb) {
1010 mono_thread_start_cb (tid, stack_start, func);
1014 void mono_threads_set_default_stacksize (guint32 stacksize)
1016 default_stacksize = stacksize;
1019 guint32 mono_threads_get_default_stacksize (void)
1021 return default_stacksize;
1025 * mono_thread_create_internal:
1027 * ARG should not be a GC reference.
1030 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
1033 MonoInternalThread *internal;
1036 mono_error_init (error);
1038 internal = create_internal_thread_object ();
1040 thread = create_thread_object (domain, internal);
1042 LOCK_THREAD (internal);
1044 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
1045 return_val_if_nok (error, NULL);
1047 UNLOCK_THREAD (internal);
1053 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1056 if (!mono_thread_create_checked (domain, func, arg, &error))
1057 mono_error_cleanup (&error);
1061 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1063 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
1067 mono_thread_attach (MonoDomain *domain)
1069 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1075 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1077 MonoInternalThread *internal;
1079 MonoNativeThreadId tid;
1082 if (mono_thread_internal_current_is_attached ()) {
1083 if (domain != mono_domain_get ())
1084 mono_domain_set (domain, TRUE);
1085 /* Already attached */
1086 return mono_thread_current ();
1089 if (!mono_gc_register_thread (&domain)) {
1090 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 ());
1093 tid=mono_native_thread_id_get ();
1095 internal = create_internal_thread_object ();
1097 thread = create_thread_object (domain, internal);
1099 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
1100 /* Mono is shutting down, so just wait for the end */
1102 mono_thread_info_sleep (10000, NULL);
1105 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1107 if (mono_thread_attach_cb) {
1111 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1114 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1116 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1119 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1120 if (!mono_thread_info_current ()->tools_thread)
1121 // FIXME: Need a separate callback
1122 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1128 mono_thread_detach_internal (MonoInternalThread *thread)
1130 g_return_if_fail (thread != NULL);
1132 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1135 mono_w32mutex_abandon ();
1138 thread_cleanup (thread);
1140 SET_CURRENT_OBJECT (NULL);
1141 mono_domain_unset ();
1143 /* Don't need to close the handle to this thread, even though we took a
1144 * reference in mono_thread_attach (), because the GC will do it
1145 * when the Thread object is finalised.
1150 mono_thread_detach (MonoThread *thread)
1153 mono_thread_detach_internal (thread->internal_thread);
1157 * mono_thread_detach_if_exiting:
1159 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1160 * This should be used at the end of embedding code which calls into managed code, and which
1161 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1164 mono_thread_detach_if_exiting (void)
1166 if (mono_thread_info_is_exiting ()) {
1167 MonoInternalThread *thread;
1169 thread = mono_thread_internal_current ();
1171 mono_thread_detach_internal (thread);
1172 mono_thread_info_detach ();
1180 mono_thread_internal_current_is_attached (void)
1182 MonoInternalThread *internal;
1184 internal = GET_CURRENT_OBJECT ();
1192 mono_thread_exit (void)
1194 MonoInternalThread *thread = mono_thread_internal_current ();
1196 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1198 mono_thread_detach_internal (thread);
1200 /* we could add a callback here for embedders to use. */
1201 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1202 exit (mono_environment_exitcode_get ());
1204 mono_thread_info_exit (0);
1208 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1210 MonoInternalThread *internal;
1212 internal = create_internal_thread_object ();
1214 internal->state = ThreadState_Unstarted;
1216 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1220 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1222 return mono_thread_current ();
1226 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1230 MonoInternalThread *internal;
1233 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1235 if (!this_obj->internal_thread)
1236 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1237 internal = this_obj->internal_thread;
1239 LOCK_THREAD (internal);
1241 if ((internal->state & ThreadState_Unstarted) == 0) {
1242 UNLOCK_THREAD (internal);
1243 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1247 if ((internal->state & ThreadState_Aborted) != 0) {
1248 UNLOCK_THREAD (internal);
1252 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1254 mono_error_cleanup (&error);
1255 UNLOCK_THREAD (internal);
1259 internal->state &= ~ThreadState_Unstarted;
1261 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1263 UNLOCK_THREAD (internal);
1264 return internal->handle;
1268 * This is called from the finalizer of the internal thread object.
1271 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1273 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1276 * Since threads keep a reference to their thread object while running, by the time this function is called,
1277 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1278 * when thread_cleanup () can be called after this.
1280 if (this_obj->handle) {
1281 mono_threads_close_thread_handle (this_obj->handle);
1282 this_obj->handle = NULL;
1286 CloseHandle (this_obj->native_handle);
1289 if (this_obj->synch_cs) {
1290 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1291 this_obj->synch_cs = NULL;
1292 mono_coop_mutex_destroy (synch_cs);
1296 if (this_obj->name) {
1297 void *name = this_obj->name;
1298 this_obj->name = NULL;
1304 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1307 MonoInternalThread *thread = mono_thread_internal_current ();
1309 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1311 if (mono_thread_current_check_pending_interrupt ())
1315 gboolean alerted = FALSE;
1317 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1319 res = mono_thread_info_sleep (ms, &alerted);
1321 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1324 MonoException* exc = mono_thread_execute_interruption ();
1326 mono_raise_exception (exc);
1338 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1343 ves_icall_System_Threading_Thread_GetDomainID (void)
1345 return mono_domain_get()->domain_id;
1349 ves_icall_System_Threading_Thread_Yield (void)
1351 return mono_thread_info_yield ();
1355 * mono_thread_get_name:
1357 * Return the name of the thread. NAME_LEN is set to the length of the name.
1358 * Return NULL if the thread has no name. The returned memory is owned by the
1362 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1366 LOCK_THREAD (this_obj);
1368 if (!this_obj->name) {
1372 *name_len = this_obj->name_len;
1373 res = g_new (gunichar2, this_obj->name_len);
1374 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1377 UNLOCK_THREAD (this_obj);
1383 * mono_thread_get_name_utf8:
1385 * Return the name of the thread in UTF-8.
1386 * Return NULL if the thread has no name.
1387 * The returned memory is owned by the caller.
1390 mono_thread_get_name_utf8 (MonoThread *thread)
1395 MonoInternalThread *internal = thread->internal_thread;
1396 if (internal == NULL)
1399 LOCK_THREAD (internal);
1401 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1403 UNLOCK_THREAD (internal);
1409 * mono_thread_get_managed_id:
1411 * Return the Thread.ManagedThreadId value of `thread`.
1412 * Returns -1 if `thread` is NULL.
1415 mono_thread_get_managed_id (MonoThread *thread)
1420 MonoInternalThread *internal = thread->internal_thread;
1421 if (internal == NULL)
1424 int32_t id = internal->managed_id;
1430 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1435 mono_error_init (&error);
1437 LOCK_THREAD (this_obj);
1439 if (!this_obj->name)
1442 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1444 UNLOCK_THREAD (this_obj);
1446 if (mono_error_set_pending_exception (&error))
1453 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1455 LOCK_THREAD (this_obj);
1457 mono_error_init (error);
1459 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1460 UNLOCK_THREAD (this_obj);
1462 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1465 if (this_obj->name) {
1466 g_free (this_obj->name);
1467 this_obj->name_len = 0;
1470 this_obj->name = g_new (gunichar2, mono_string_length (name));
1471 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1472 this_obj->name_len = mono_string_length (name);
1475 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1478 this_obj->name = NULL;
1481 UNLOCK_THREAD (this_obj);
1483 if (this_obj->name && this_obj->tid) {
1484 char *tname = mono_string_to_utf8_checked (name, error);
1485 return_if_nok (error);
1486 mono_profiler_thread_name (this_obj->tid, tname);
1487 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1493 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1496 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1497 mono_error_set_pending_exception (&error);
1501 * ves_icall_System_Threading_Thread_GetPriority_internal:
1502 * @param this_obj: The MonoInternalThread on which to operate.
1504 * Gets the priority of the given thread.
1505 * @return: The priority of the given thread.
1508 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1511 MonoInternalThread *internal = this_obj->internal_thread;
1513 LOCK_THREAD (internal);
1514 priority = internal->priority;
1515 UNLOCK_THREAD (internal);
1521 * ves_icall_System_Threading_Thread_SetPriority_internal:
1522 * @param this_obj: The MonoInternalThread on which to operate.
1523 * @param priority: The priority to set.
1525 * Sets the priority of the given thread.
1528 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1530 MonoInternalThread *internal = this_obj->internal_thread;
1532 LOCK_THREAD (internal);
1533 internal->priority = priority;
1534 if (internal->thread_info != NULL)
1535 mono_thread_internal_set_priority (internal, priority);
1536 UNLOCK_THREAD (internal);
1539 /* If the array is already in the requested domain, we just return it,
1540 otherwise we return a copy in that domain. */
1542 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1546 mono_error_init (error);
1550 if (mono_object_domain (arr) == domain)
1553 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1554 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1559 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1562 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1563 mono_error_set_pending_exception (&error);
1568 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1571 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1572 mono_error_set_pending_exception (&error);
1577 mono_thread_current (void)
1579 MonoDomain *domain = mono_domain_get ();
1580 MonoInternalThread *internal = mono_thread_internal_current ();
1581 MonoThread **current_thread_ptr;
1583 g_assert (internal);
1584 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1586 if (!*current_thread_ptr) {
1587 g_assert (domain != mono_get_root_domain ());
1588 *current_thread_ptr = create_thread_object (domain, internal);
1590 return *current_thread_ptr;
1593 /* Return the thread object belonging to INTERNAL in the current domain */
1595 mono_thread_current_for_thread (MonoInternalThread *internal)
1597 MonoDomain *domain = mono_domain_get ();
1598 MonoThread **current_thread_ptr;
1600 g_assert (internal);
1601 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1603 if (!*current_thread_ptr) {
1604 g_assert (domain != mono_get_root_domain ());
1605 *current_thread_ptr = create_thread_object (domain, internal);
1607 return *current_thread_ptr;
1611 mono_thread_internal_current (void)
1613 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1614 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1619 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1621 MonoInternalThread *thread = this_obj->internal_thread;
1622 MonoThreadHandle *handle = thread->handle;
1623 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1626 if (mono_thread_current_check_pending_interrupt ())
1629 LOCK_THREAD (thread);
1631 if ((thread->state & ThreadState_Unstarted) != 0) {
1632 UNLOCK_THREAD (thread);
1634 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1638 UNLOCK_THREAD (thread);
1643 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1645 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1648 ret=mono_thread_info_wait_one_handle (handle, ms, TRUE);
1651 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1653 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1654 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1659 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1664 #define MANAGED_WAIT_FAILED 0x7fffffff
1667 map_native_wait_result_to_managed (gint32 val)
1669 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1670 return val == WAIT_FAILED ? MANAGED_WAIT_FAILED : val;
1674 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1682 mono_error_init (error);
1684 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1687 if (numhandles != 1)
1688 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE);
1690 ret = WaitForSingleObjectEx (handles [0], ms, TRUE);
1693 if (ret != WAIT_IO_COMPLETION)
1696 exc = mono_thread_execute_interruption ();
1698 mono_error_set_exception_instance (error, exc);
1705 /* Re-calculate ms according to the time passed */
1706 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1707 if (diff_ms >= ms) {
1711 wait = ms - diff_ms;
1717 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1724 MonoObject *waitHandle;
1725 MonoInternalThread *thread = mono_thread_internal_current ();
1727 /* Do this WaitSleepJoin check before creating objects */
1728 if (mono_thread_current_check_pending_interrupt ())
1729 return map_native_wait_result_to_managed (WAIT_FAILED);
1731 /* We fail in managed if the array has more than 64 elements */
1732 numhandles = (guint32)mono_array_length(mono_handles);
1733 handles = g_new0(HANDLE, numhandles);
1735 for(i = 0; i < numhandles; i++) {
1736 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1737 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1744 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1746 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1748 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1752 mono_error_set_pending_exception (&error);
1754 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1755 return map_native_wait_result_to_managed (ret);
1758 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1761 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1762 uintptr_t numhandles;
1765 MonoObject *waitHandle;
1766 MonoInternalThread *thread = mono_thread_internal_current ();
1768 /* Do this WaitSleepJoin check before creating objects */
1769 if (mono_thread_current_check_pending_interrupt ())
1770 return map_native_wait_result_to_managed (WAIT_FAILED);
1772 numhandles = mono_array_length(mono_handles);
1773 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1774 return map_native_wait_result_to_managed (WAIT_FAILED);
1776 for(i = 0; i < numhandles; i++) {
1777 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1778 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1785 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1787 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1789 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1791 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1793 mono_error_set_pending_exception (&error);
1795 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1796 return map_native_wait_result_to_managed (ret);
1799 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1803 MonoInternalThread *thread = mono_thread_internal_current ();
1805 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1811 if (mono_thread_current_check_pending_interrupt ())
1812 return map_native_wait_result_to_managed (WAIT_FAILED);
1814 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1816 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1818 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1820 mono_error_set_pending_exception (&error);
1821 return map_native_wait_result_to_managed (ret);
1825 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1828 MonoInternalThread *thread = mono_thread_internal_current ();
1833 if (mono_thread_current_check_pending_interrupt ())
1834 return map_native_wait_result_to_managed (WAIT_FAILED);
1836 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1839 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1842 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1844 return map_native_wait_result_to_managed (ret);
1847 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1849 return InterlockedIncrement (location);
1852 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1854 #if SIZEOF_VOID_P == 4
1855 if (G_UNLIKELY ((size_t)location & 0x7)) {
1857 mono_interlocked_lock ();
1860 mono_interlocked_unlock ();
1864 return InterlockedIncrement64 (location);
1867 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1869 return InterlockedDecrement(location);
1872 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1874 #if SIZEOF_VOID_P == 4
1875 if (G_UNLIKELY ((size_t)location & 0x7)) {
1877 mono_interlocked_lock ();
1880 mono_interlocked_unlock ();
1884 return InterlockedDecrement64 (location);
1887 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1889 return InterlockedExchange(location, value);
1892 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1895 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1896 mono_gc_wbarrier_generic_nostore (location);
1900 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1902 return InterlockedExchangePointer(location, value);
1905 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1907 IntFloatUnion val, ret;
1910 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1916 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1918 #if SIZEOF_VOID_P == 4
1919 if (G_UNLIKELY ((size_t)location & 0x7)) {
1921 mono_interlocked_lock ();
1924 mono_interlocked_unlock ();
1928 return InterlockedExchange64 (location, value);
1932 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1934 LongDoubleUnion val, ret;
1937 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1942 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1944 return InterlockedCompareExchange(location, value, comparand);
1947 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1949 gint32 r = InterlockedCompareExchange(location, value, comparand);
1950 *success = r == comparand;
1954 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1957 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1958 mono_gc_wbarrier_generic_nostore (location);
1962 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1964 return InterlockedCompareExchangePointer(location, value, comparand);
1967 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1969 IntFloatUnion val, ret, cmp;
1972 cmp.fval = comparand;
1973 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1979 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1981 #if SIZEOF_VOID_P == 8
1982 LongDoubleUnion val, comp, ret;
1985 comp.fval = comparand;
1986 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1992 mono_interlocked_lock ();
1994 if (old == comparand)
1996 mono_interlocked_unlock ();
2003 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2005 #if SIZEOF_VOID_P == 4
2006 if (G_UNLIKELY ((size_t)location & 0x7)) {
2008 mono_interlocked_lock ();
2010 if (old == comparand)
2012 mono_interlocked_unlock ();
2016 return InterlockedCompareExchange64 (location, value, comparand);
2020 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2023 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2024 mono_gc_wbarrier_generic_nostore (location);
2029 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2032 MONO_CHECK_NULL (location, NULL);
2033 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2034 mono_gc_wbarrier_generic_nostore (location);
2039 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2041 return InterlockedAdd (location, value);
2045 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2047 #if SIZEOF_VOID_P == 4
2048 if (G_UNLIKELY ((size_t)location & 0x7)) {
2050 mono_interlocked_lock ();
2053 mono_interlocked_unlock ();
2057 return InterlockedAdd64 (location, value);
2061 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2063 #if SIZEOF_VOID_P == 4
2064 if (G_UNLIKELY ((size_t)location & 0x7)) {
2066 mono_interlocked_lock ();
2068 mono_interlocked_unlock ();
2072 return InterlockedRead64 (location);
2076 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2078 mono_memory_barrier ();
2082 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2084 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2086 if (state & ThreadState_Background) {
2087 /* If the thread changes the background mode, the main thread has to
2088 * be notified, since it has to rebuild the list of threads to
2091 mono_os_event_set (&background_change_event);
2096 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2098 mono_thread_set_state (this_obj, (MonoThreadState)state);
2100 if (state & ThreadState_Background) {
2101 /* If the thread changes the background mode, the main thread has to
2102 * be notified, since it has to rebuild the list of threads to
2105 mono_os_event_set (&background_change_event);
2110 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2114 LOCK_THREAD (this_obj);
2116 state = this_obj->state;
2118 UNLOCK_THREAD (this_obj);
2123 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2125 MonoInternalThread *current;
2127 MonoInternalThread *thread = this_obj->internal_thread;
2129 LOCK_THREAD (thread);
2131 current = mono_thread_internal_current ();
2133 thread->thread_interrupt_requested = TRUE;
2134 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2136 UNLOCK_THREAD (thread);
2139 async_abort_internal (thread, FALSE);
2144 * mono_thread_current_check_pending_interrupt:
2146 * Checks if there's a interruption request and set the pending exception if so.
2148 * @returns true if a pending exception was set
2151 mono_thread_current_check_pending_interrupt (void)
2153 MonoInternalThread *thread = mono_thread_internal_current ();
2154 gboolean throw_ = FALSE;
2156 LOCK_THREAD (thread);
2158 if (thread->thread_interrupt_requested) {
2160 thread->thread_interrupt_requested = FALSE;
2163 UNLOCK_THREAD (thread);
2166 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2171 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2173 LOCK_THREAD (thread);
2175 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2176 (thread->state & ThreadState_StopRequested) != 0 ||
2177 (thread->state & ThreadState_Stopped) != 0)
2179 UNLOCK_THREAD (thread);
2183 if ((thread->state & ThreadState_Unstarted) != 0) {
2184 thread->state |= ThreadState_Aborted;
2185 UNLOCK_THREAD (thread);
2189 thread->state |= ThreadState_AbortRequested;
2190 if (thread->abort_state_handle)
2191 mono_gchandle_free (thread->abort_state_handle);
2193 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2194 g_assert (thread->abort_state_handle);
2196 thread->abort_state_handle = 0;
2198 thread->abort_exc = NULL;
2200 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));
2202 /* During shutdown, we can't wait for other threads */
2204 /* Make sure the thread is awake */
2205 mono_thread_resume (thread);
2207 UNLOCK_THREAD (thread);
2212 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2214 if (!request_thread_abort (thread, state))
2217 if (thread == mono_thread_internal_current ()) {
2219 self_abort_internal (&error);
2220 mono_error_set_pending_exception (&error);
2222 async_abort_internal (thread, TRUE);
2227 * mono_thread_internal_abort:
2229 * Request thread @thread to be aborted.
2231 * @thread MUST NOT be the current thread.
2234 mono_thread_internal_abort (MonoInternalThread *thread)
2236 g_assert (thread != mono_thread_internal_current ());
2238 if (!request_thread_abort (thread, NULL))
2240 async_abort_internal (thread, TRUE);
2244 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2246 MonoInternalThread *thread = mono_thread_internal_current ();
2247 gboolean was_aborting;
2249 LOCK_THREAD (thread);
2250 was_aborting = thread->state & ThreadState_AbortRequested;
2251 thread->state &= ~ThreadState_AbortRequested;
2252 UNLOCK_THREAD (thread);
2254 if (!was_aborting) {
2255 const char *msg = "Unable to reset abort because no abort was requested";
2256 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2260 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2261 thread->abort_exc = NULL;
2262 if (thread->abort_state_handle) {
2263 mono_gchandle_free (thread->abort_state_handle);
2264 /* This is actually not necessary - the handle
2265 only counts if the exception is set */
2266 thread->abort_state_handle = 0;
2271 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2273 LOCK_THREAD (thread);
2275 thread->state &= ~ThreadState_AbortRequested;
2277 if (thread->abort_exc) {
2278 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2279 thread->abort_exc = NULL;
2280 if (thread->abort_state_handle) {
2281 mono_gchandle_free (thread->abort_state_handle);
2282 /* This is actually not necessary - the handle
2283 only counts if the exception is set */
2284 thread->abort_state_handle = 0;
2288 UNLOCK_THREAD (thread);
2292 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2295 MonoInternalThread *thread = this_obj->internal_thread;
2296 MonoObject *state, *deserialized = NULL;
2299 if (!thread->abort_state_handle)
2302 state = mono_gchandle_get_target (thread->abort_state_handle);
2305 domain = mono_domain_get ();
2306 if (mono_object_domain (state) == domain)
2309 deserialized = mono_object_xdomain_representation (state, domain, &error);
2311 if (!deserialized) {
2312 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2313 if (!is_ok (&error)) {
2314 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2315 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2317 mono_set_pending_exception (invalid_op_exc);
2321 return deserialized;
2325 mono_thread_suspend (MonoInternalThread *thread)
2327 LOCK_THREAD (thread);
2329 if ((thread->state & ThreadState_Unstarted) != 0 ||
2330 (thread->state & ThreadState_Aborted) != 0 ||
2331 (thread->state & ThreadState_Stopped) != 0)
2333 UNLOCK_THREAD (thread);
2337 if ((thread->state & ThreadState_Suspended) != 0 ||
2338 (thread->state & ThreadState_SuspendRequested) != 0 ||
2339 (thread->state & ThreadState_StopRequested) != 0)
2341 UNLOCK_THREAD (thread);
2345 thread->state |= ThreadState_SuspendRequested;
2346 mono_os_event_reset (thread->suspended);
2348 if (thread == mono_thread_internal_current ()) {
2349 /* calls UNLOCK_THREAD (thread) */
2350 self_suspend_internal ();
2352 /* calls UNLOCK_THREAD (thread) */
2353 async_suspend_internal (thread, FALSE);
2360 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2362 if (!mono_thread_suspend (this_obj->internal_thread)) {
2363 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2368 /* LOCKING: LOCK_THREAD(thread) must be held */
2370 mono_thread_resume (MonoInternalThread *thread)
2372 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2373 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2374 thread->state &= ~ThreadState_SuspendRequested;
2375 mono_os_event_set (thread->suspended);
2379 if ((thread->state & ThreadState_Suspended) == 0 ||
2380 (thread->state & ThreadState_Unstarted) != 0 ||
2381 (thread->state & ThreadState_Aborted) != 0 ||
2382 (thread->state & ThreadState_Stopped) != 0)
2384 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2388 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2390 mono_os_event_set (thread->suspended);
2392 if (!thread->self_suspended) {
2393 UNLOCK_THREAD (thread);
2395 /* Awake the thread */
2396 if (!mono_thread_info_resume (thread_get_tid (thread)))
2399 LOCK_THREAD (thread);
2402 thread->state &= ~ThreadState_Suspended;
2408 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2410 if (!thread->internal_thread) {
2411 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2413 LOCK_THREAD (thread->internal_thread);
2414 if (!mono_thread_resume (thread->internal_thread))
2415 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2416 UNLOCK_THREAD (thread->internal_thread);
2421 mono_threads_is_critical_method (MonoMethod *method)
2423 switch (method->wrapper_type) {
2424 case MONO_WRAPPER_RUNTIME_INVOKE:
2425 case MONO_WRAPPER_XDOMAIN_INVOKE:
2426 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2433 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2438 if (mono_threads_is_critical_method (m)) {
2439 *((gboolean*)data) = TRUE;
2446 is_running_protected_wrapper (void)
2448 gboolean found = FALSE;
2449 mono_stack_walk (find_wrapper, &found);
2454 request_thread_stop (MonoInternalThread *thread)
2456 LOCK_THREAD (thread);
2458 if ((thread->state & ThreadState_StopRequested) != 0 ||
2459 (thread->state & ThreadState_Stopped) != 0)
2461 UNLOCK_THREAD (thread);
2465 /* Make sure the thread is awake */
2466 mono_thread_resume (thread);
2468 thread->state |= ThreadState_StopRequested;
2469 thread->state &= ~ThreadState_AbortRequested;
2471 UNLOCK_THREAD (thread);
2476 * mono_thread_internal_stop:
2478 * Request thread @thread to stop.
2480 * @thread MUST NOT be the current thread.
2483 mono_thread_internal_stop (MonoInternalThread *thread)
2485 g_assert (thread != mono_thread_internal_current ());
2487 if (!request_thread_stop (thread))
2490 async_abort_internal (thread, TRUE);
2493 void mono_thread_stop (MonoThread *thread)
2495 MonoInternalThread *internal = thread->internal_thread;
2497 if (!request_thread_stop (internal))
2500 if (internal == mono_thread_internal_current ()) {
2502 self_abort_internal (&error);
2504 This function is part of the embeding API and has no way to return the exception
2505 to be thrown. So what we do is keep the old behavior and raise the exception.
2507 mono_error_raise_exception (&error); /* OK to throw, see note */
2509 async_abort_internal (internal, TRUE);
2514 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2516 gint8 tmp = *(volatile gint8 *)ptr;
2517 mono_memory_barrier ();
2522 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2524 gint16 tmp = *(volatile gint16 *)ptr;
2525 mono_memory_barrier ();
2530 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2532 gint32 tmp = *(volatile gint32 *)ptr;
2533 mono_memory_barrier ();
2538 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2540 gint64 tmp = *(volatile gint64 *)ptr;
2541 mono_memory_barrier ();
2546 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2548 volatile void *tmp = *(volatile void **)ptr;
2549 mono_memory_barrier ();
2550 return (void *) tmp;
2554 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2556 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2557 mono_memory_barrier ();
2558 return (MonoObject *) tmp;
2562 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2564 double tmp = *(volatile double *)ptr;
2565 mono_memory_barrier ();
2570 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2572 float tmp = *(volatile float *)ptr;
2573 mono_memory_barrier ();
2578 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2580 return InterlockedRead8 ((volatile gint8 *)ptr);
2584 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2586 return InterlockedRead16 ((volatile gint16 *)ptr);
2590 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2592 return InterlockedRead ((volatile gint32 *)ptr);
2596 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2598 #if SIZEOF_VOID_P == 4
2599 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2601 mono_interlocked_lock ();
2602 val = *(gint64*)ptr;
2603 mono_interlocked_unlock ();
2607 return InterlockedRead64 ((volatile gint64 *)ptr);
2611 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2613 return InterlockedReadPointer ((volatile gpointer *)ptr);
2617 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2621 #if SIZEOF_VOID_P == 4
2622 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2624 mono_interlocked_lock ();
2625 val = *(double*)ptr;
2626 mono_interlocked_unlock ();
2631 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2637 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2641 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2647 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2649 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2653 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2655 mono_memory_barrier ();
2656 *(volatile gint8 *)ptr = value;
2660 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2662 mono_memory_barrier ();
2663 *(volatile gint16 *)ptr = value;
2667 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2669 mono_memory_barrier ();
2670 *(volatile gint32 *)ptr = value;
2674 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2676 mono_memory_barrier ();
2677 *(volatile gint64 *)ptr = value;
2681 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2683 mono_memory_barrier ();
2684 *(volatile void **)ptr = value;
2688 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2690 mono_memory_barrier ();
2691 mono_gc_wbarrier_generic_store (ptr, value);
2695 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2697 mono_memory_barrier ();
2698 *(volatile double *)ptr = value;
2702 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2704 mono_memory_barrier ();
2705 *(volatile float *)ptr = value;
2709 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2711 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2715 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2717 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2721 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2723 InterlockedWrite ((volatile gint32 *)ptr, value);
2727 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2729 #if SIZEOF_VOID_P == 4
2730 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2731 mono_interlocked_lock ();
2732 *(gint64*)ptr = value;
2733 mono_interlocked_unlock ();
2738 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2742 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2744 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2748 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2752 #if SIZEOF_VOID_P == 4
2753 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2754 mono_interlocked_lock ();
2755 *(double*)ptr = value;
2756 mono_interlocked_unlock ();
2763 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2767 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2773 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2777 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2779 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2783 free_context (void *user_data)
2785 ContextStaticData *data = user_data;
2787 mono_threads_lock ();
2790 * There is no guarantee that, by the point this reference queue callback
2791 * has been invoked, the GC handle associated with the object will fail to
2792 * resolve as one might expect. So if we don't free and remove the GC
2793 * handle here, free_context_static_data_helper () could end up resolving
2794 * a GC handle to an actually-dead context which would contain a pointer
2795 * to an already-freed static data segment, resulting in a crash when
2798 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2800 mono_threads_unlock ();
2802 mono_gchandle_free (data->gc_handle);
2803 mono_free_static_data (data->static_data);
2808 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2810 mono_threads_lock ();
2812 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2815 contexts = g_hash_table_new (NULL, NULL);
2818 context_queue = mono_gc_reference_queue_new (free_context);
2820 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2821 g_hash_table_insert (contexts, gch, gch);
2824 * We use this intermediate structure to contain a duplicate pointer to
2825 * the static data because we can't rely on being able to resolve the GC
2826 * handle in the reference queue callback.
2828 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2829 data->gc_handle = GPOINTER_TO_UINT (gch);
2832 context_adjust_static_data (ctx);
2833 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2835 mono_threads_unlock ();
2837 mono_profiler_context_loaded (ctx);
2841 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2844 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2845 * cleanup in exceptional circumstances, we don't actually do any
2846 * cleanup work here. We instead do this via a reference queue.
2849 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2851 mono_profiler_context_unloaded (ctx);
2855 mono_thread_init_tls (void)
2857 MONO_FAST_TLS_INIT (tls_current_object);
2858 mono_native_tls_alloc (¤t_object_key, NULL);
2861 void mono_thread_init (MonoThreadStartCB start_cb,
2862 MonoThreadAttachCB attach_cb)
2864 mono_coop_mutex_init_recursive (&threads_mutex);
2866 mono_os_mutex_init_recursive(&interlocked_mutex);
2867 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2869 mono_os_event_init (&background_change_event, FALSE);
2871 mono_init_static_data_info (&thread_static_info);
2872 mono_init_static_data_info (&context_static_info);
2874 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2876 mono_thread_start_cb = start_cb;
2877 mono_thread_attach_cb = attach_cb;
2880 void mono_thread_cleanup (void)
2882 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
2883 /* The main thread must abandon any held mutexes (particularly
2884 * important for named mutexes as they are shared across
2885 * processes, see bug 74680.) This will happen when the
2886 * thread exits, but if it's not running in a subthread it
2887 * won't exit in time.
2889 mono_w32mutex_abandon ();
2893 /* This stuff needs more testing, it seems one of these
2894 * critical sections can be locked when mono_thread_cleanup is
2897 mono_coop_mutex_destroy (&threads_mutex);
2898 mono_os_mutex_destroy (&interlocked_mutex);
2899 mono_os_mutex_destroy (&delayed_free_table_mutex);
2900 mono_os_mutex_destroy (&small_id_mutex);
2901 mono_os_event_destroy (&background_change_event);
2904 mono_native_tls_free (current_object_key);
2908 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2910 mono_thread_cleanup_fn = func;
2914 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2916 thread->internal_thread->manage_callback = func;
2920 static void print_tids (gpointer key, gpointer value, gpointer user)
2922 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2923 * sizeof(uint) and a cast to uint would overflow
2925 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2926 * print this as a pointer.
2928 g_message ("Waiting for: %p", key);
2933 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2934 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2939 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
2942 MonoThreadInfoWaitRet ret;
2944 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2946 /* Add the thread state change event, so it wakes
2947 * up if a thread changes to background mode. */
2950 if (check_state_change)
2951 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
2953 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
2956 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
2957 /* See the comment in build_wait_tids() */
2958 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2962 for( i = 0; i < wait->num; i++)
2963 mono_threads_close_thread_handle (wait->handles [i]);
2965 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
2968 if (ret < wait->num) {
2969 MonoInternalThread *internal;
2971 internal = wait->threads [ret];
2973 mono_threads_lock ();
2974 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
2975 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
2976 mono_threads_unlock ();
2980 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2982 struct wait_data *wait=(struct wait_data *)user;
2984 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
2985 MonoInternalThread *thread=(MonoInternalThread *)value;
2987 /* Ignore background threads, we abort them later */
2988 /* Do not lock here since it is not needed and the caller holds threads_lock */
2989 if (thread->state & ThreadState_Background) {
2990 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2991 return; /* just leave, ignore */
2994 if (mono_gc_is_finalizer_internal_thread (thread)) {
2995 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2999 if (thread == mono_thread_internal_current ()) {
3000 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3004 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3005 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3009 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3010 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3014 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3015 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3016 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3017 wait->threads[wait->num]=thread;
3020 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3022 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3027 /* Just ignore the rest, we can't do anything with
3034 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3036 struct wait_data *wait=(struct wait_data *)user;
3037 MonoNativeThreadId self = mono_native_thread_id_get ();
3038 MonoInternalThread *thread = (MonoInternalThread *)value;
3040 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3043 /* The finalizer thread is not a background thread */
3044 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3045 && (thread->state & ThreadState_Background) != 0
3046 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3048 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3049 wait->threads[wait->num] = thread;
3052 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3053 mono_thread_internal_abort (thread);
3057 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3058 && !mono_gc_is_finalizer_internal_thread (thread);
3062 * mono_threads_set_shutting_down:
3064 * Is called by a thread that wants to shut down Mono. If the runtime is already
3065 * shutting down, the calling thread is suspended/stopped, and this function never
3069 mono_threads_set_shutting_down (void)
3071 MonoInternalThread *current_thread = mono_thread_internal_current ();
3073 mono_threads_lock ();
3075 if (shutting_down) {
3076 mono_threads_unlock ();
3078 /* Make sure we're properly suspended/stopped */
3080 LOCK_THREAD (current_thread);
3082 if ((current_thread->state & ThreadState_SuspendRequested) ||
3083 (current_thread->state & ThreadState_AbortRequested) ||
3084 (current_thread->state & ThreadState_StopRequested)) {
3085 UNLOCK_THREAD (current_thread);
3086 mono_thread_execute_interruption ();
3088 current_thread->state |= ThreadState_Stopped;
3089 UNLOCK_THREAD (current_thread);
3092 /*since we're killing the thread, detach it.*/
3093 mono_thread_detach_internal (current_thread);
3095 /* Wake up other threads potentially waiting for us */
3096 mono_thread_info_exit (0);
3098 shutting_down = TRUE;
3100 /* Not really a background state change, but this will
3101 * interrupt the main thread if it is waiting for all
3102 * the other threads.
3104 mono_os_event_set (&background_change_event);
3106 mono_threads_unlock ();
3110 void mono_thread_manage (void)
3112 struct wait_data wait_data;
3113 struct wait_data *wait = &wait_data;
3115 memset (wait, 0, sizeof (struct wait_data));
3116 /* join each thread that's still running */
3117 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3119 mono_threads_lock ();
3121 THREAD_DEBUG (g_message("%s: No threads", __func__));
3122 mono_threads_unlock ();
3125 mono_threads_unlock ();
3128 mono_threads_lock ();
3129 if (shutting_down) {
3130 /* somebody else is shutting down */
3131 mono_threads_unlock ();
3134 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3135 mono_g_hash_table_foreach (threads, print_tids, NULL));
3137 mono_os_event_reset (&background_change_event);
3139 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3140 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3141 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3142 mono_threads_unlock ();
3144 /* Something to wait for */
3145 wait_for_tids (wait, INFINITE, TRUE);
3146 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3147 } while(wait->num>0);
3149 /* Mono is shutting down, so just wait for the end */
3150 if (!mono_runtime_try_shutdown ()) {
3151 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3152 mono_thread_suspend (mono_thread_internal_current ());
3153 mono_thread_execute_interruption ();
3157 * Remove everything but the finalizer thread and self.
3158 * Also abort all the background threads
3161 mono_threads_lock ();
3164 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3165 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3166 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3168 mono_threads_unlock ();
3170 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3171 if (wait->num > 0) {
3172 /* Something to wait for */
3173 wait_for_tids (wait, INFINITE, FALSE);
3175 } while (wait->num > 0);
3178 * give the subthreads a chance to really quit (this is mainly needed
3179 * to get correct user and system times from getrusage/wait/time(1)).
3180 * This could be removed if we avoid pthread_detach() and use pthread_join().
3182 mono_thread_info_yield ();
3186 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3188 MonoInternalThread *thread = (MonoInternalThread*)value;
3189 struct wait_data *wait = (struct wait_data*)user_data;
3192 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3194 * This needs no locking.
3196 if ((thread->state & ThreadState_Suspended) != 0 ||
3197 (thread->state & ThreadState_Stopped) != 0)
3200 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3201 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3202 wait->threads [wait->num] = thread;
3208 * mono_thread_suspend_all_other_threads:
3210 * Suspend all managed threads except the finalizer thread and this thread. It is
3211 * not possible to resume them later.
3213 void mono_thread_suspend_all_other_threads (void)
3215 struct wait_data wait_data;
3216 struct wait_data *wait = &wait_data;
3218 MonoNativeThreadId self = mono_native_thread_id_get ();
3219 guint32 eventidx = 0;
3220 gboolean starting, finished;
3222 memset (wait, 0, sizeof (struct wait_data));
3224 * The other threads could be in an arbitrary state at this point, i.e.
3225 * they could be starting up, shutting down etc. This means that there could be
3226 * threads which are not even in the threads hash table yet.
3230 * First we set a barrier which will be checked by all threads before they
3231 * are added to the threads hash table, and they will exit if the flag is set.
3232 * This ensures that no threads could be added to the hash later.
3233 * We will use shutting_down as the barrier for now.
3235 g_assert (shutting_down);
3238 * We make multiple calls to WaitForMultipleObjects since:
3239 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3240 * - some threads could exit without becoming suspended
3245 * Make a copy of the hashtable since we can't do anything with
3246 * threads while threads_mutex is held.
3249 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3250 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3251 mono_threads_lock ();
3252 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3253 mono_threads_unlock ();
3256 /* Get the suspended events that we'll be waiting for */
3257 for (i = 0; i < wait->num; ++i) {
3258 MonoInternalThread *thread = wait->threads [i];
3260 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3261 || mono_gc_is_finalizer_internal_thread (thread)
3262 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3264 mono_threads_close_thread_handle (wait->handles [i]);
3265 wait->threads [i] = NULL;
3269 LOCK_THREAD (thread);
3271 if ((thread->state & ThreadState_Suspended) != 0 ||
3272 (thread->state & ThreadState_StopRequested) != 0 ||
3273 (thread->state & ThreadState_Stopped) != 0) {
3274 UNLOCK_THREAD (thread);
3275 mono_threads_close_thread_handle (wait->handles [i]);
3276 wait->threads [i] = NULL;
3282 /* Convert abort requests into suspend requests */
3283 if ((thread->state & ThreadState_AbortRequested) != 0)
3284 thread->state &= ~ThreadState_AbortRequested;
3286 thread->state |= ThreadState_SuspendRequested;
3287 mono_os_event_reset (thread->suspended);
3289 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3290 async_suspend_internal (thread, TRUE);
3292 mono_threads_close_thread_handle (wait->handles [i]);
3293 wait->threads [i] = NULL;
3295 if (eventidx <= 0) {
3297 * If there are threads which are starting up, we wait until they
3298 * are suspended when they try to register in the threads hash.
3299 * This is guaranteed to finish, since the threads which can create new
3300 * threads get suspended after a while.
3301 * FIXME: The finalizer thread can still create new threads.
3303 mono_threads_lock ();
3304 if (threads_starting_up)
3305 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3308 mono_threads_unlock ();
3310 mono_thread_info_sleep (100, NULL);
3318 MonoInternalThread *thread;
3319 MonoStackFrameInfo *frames;
3320 int nframes, max_frames;
3321 int nthreads, max_threads;
3322 MonoInternalThread **threads;
3323 } ThreadDumpUserData;
3325 static gboolean thread_dump_requested;
3327 /* This needs to be async safe */
3329 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3331 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3333 if (ud->nframes < ud->max_frames) {
3334 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3341 /* This needs to be async safe */
3342 static SuspendThreadResult
3343 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3345 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3346 MonoInternalThread *thread = user_data->thread;
3349 /* This no longer works with remote unwinding */
3350 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3351 mono_thread_internal_describe (thread, text);
3352 g_string_append (text, "\n");
3355 if (thread == mono_thread_internal_current ())
3356 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3358 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3360 return MonoResumeThread;
3364 int nthreads, max_threads;
3365 MonoInternalThread **threads;
3366 } CollectThreadsUserData;
3369 collect_thread (gpointer key, gpointer value, gpointer user)
3371 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3372 MonoInternalThread *thread = (MonoInternalThread *)value;
3374 if (ud->nthreads < ud->max_threads)
3375 ud->threads [ud->nthreads ++] = thread;
3379 * Collect running threads into the THREADS array.
3380 * THREADS should be an array allocated on the stack.
3383 collect_threads (MonoInternalThread **thread_array, int max_threads)
3385 CollectThreadsUserData ud;
3387 memset (&ud, 0, sizeof (ud));
3388 /* This array contains refs, but its on the stack, so its ok */
3389 ud.threads = thread_array;
3390 ud.max_threads = max_threads;
3392 mono_threads_lock ();
3393 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3394 mono_threads_unlock ();
3400 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3402 GString* text = g_string_new (0);
3404 GError *error = NULL;
3407 ud->thread = thread;
3410 /* Collect frames for the thread */
3411 if (thread == mono_thread_internal_current ()) {
3412 get_thread_dump (mono_thread_info_current (), ud);
3414 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3418 * Do all the non async-safe work outside of get_thread_dump.
3421 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3423 g_string_append_printf (text, "\n\"%s\"", name);
3426 else if (thread->threadpool_thread) {
3427 g_string_append (text, "\n\"<threadpool thread>\"");
3429 g_string_append (text, "\n\"<unnamed thread>\"");
3432 for (i = 0; i < ud->nframes; ++i) {
3433 MonoStackFrameInfo *frame = &ud->frames [i];
3434 MonoMethod *method = NULL;
3436 if (frame->type == FRAME_TYPE_MANAGED)
3437 method = mono_jit_info_get_method (frame->ji);
3440 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3441 g_string_append_printf (text, " %s\n", location);
3444 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3448 fprintf (stdout, "%s", text->str);
3450 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3451 OutputDebugStringA(text->str);
3454 g_string_free (text, TRUE);
3459 mono_threads_perform_thread_dump (void)
3461 ThreadDumpUserData ud;
3462 MonoInternalThread *thread_array [128];
3463 int tindex, nthreads;
3465 if (!thread_dump_requested)
3468 printf ("Full thread dump:\n");
3470 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3471 nthreads = collect_threads (thread_array, 128);
3473 memset (&ud, 0, sizeof (ud));
3474 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3475 ud.max_frames = 256;
3477 for (tindex = 0; tindex < nthreads; ++tindex)
3478 dump_thread (thread_array [tindex], &ud);
3482 thread_dump_requested = FALSE;
3485 /* Obtain the thread dump of all threads */
3487 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3490 ThreadDumpUserData ud;
3491 MonoInternalThread *thread_array [128];
3492 MonoDomain *domain = mono_domain_get ();
3493 MonoDebugSourceLocation *location;
3494 int tindex, nthreads;
3496 mono_error_init (error);
3498 *out_threads = NULL;
3499 *out_stack_frames = NULL;
3501 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3502 nthreads = collect_threads (thread_array, 128);
3504 memset (&ud, 0, sizeof (ud));
3505 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3506 ud.max_frames = 256;
3508 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3511 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3515 for (tindex = 0; tindex < nthreads; ++tindex) {
3516 MonoInternalThread *thread = thread_array [tindex];
3517 MonoArray *thread_frames;
3523 /* Collect frames for the thread */
3524 if (thread == mono_thread_internal_current ()) {
3525 get_thread_dump (mono_thread_info_current (), &ud);
3527 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3530 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3532 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3535 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3537 for (i = 0; i < ud.nframes; ++i) {
3538 MonoStackFrameInfo *frame = &ud.frames [i];
3539 MonoMethod *method = NULL;
3540 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3544 sf->native_offset = frame->native_offset;
3546 if (frame->type == FRAME_TYPE_MANAGED)
3547 method = mono_jit_info_get_method (frame->ji);
3550 sf->method_address = (gsize) frame->ji->code_start;
3552 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3555 MONO_OBJECT_SETREF (sf, method, rm);
3557 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3559 sf->il_offset = location->il_offset;
3561 if (location && location->source_file) {
3562 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3563 sf->line = location->row;
3564 sf->column = location->column;
3566 mono_debug_free_source_location (location);
3571 mono_array_setref (thread_frames, i, sf);
3577 return is_ok (error);
3581 * mono_threads_request_thread_dump:
3583 * Ask all threads except the current to print their stacktrace to stdout.
3586 mono_threads_request_thread_dump (void)
3588 /*The new thread dump code runs out of the finalizer thread. */
3589 thread_dump_requested = TRUE;
3590 mono_gc_finalize_notify ();
3595 gint allocated; /* +1 so that refs [allocated] == NULL */
3599 typedef struct ref_stack RefStack;
3602 ref_stack_new (gint initial_size)
3606 initial_size = MAX (initial_size, 16) + 1;
3607 rs = g_new0 (RefStack, 1);
3608 rs->refs = g_new0 (gpointer, initial_size);
3609 rs->allocated = initial_size;
3614 ref_stack_destroy (gpointer ptr)
3616 RefStack *rs = (RefStack *)ptr;
3625 ref_stack_push (RefStack *rs, gpointer ptr)
3627 g_assert (rs != NULL);
3629 if (rs->bottom >= rs->allocated) {
3630 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3631 rs->allocated <<= 1;
3632 rs->refs [rs->allocated] = NULL;
3634 rs->refs [rs->bottom++] = ptr;
3638 ref_stack_pop (RefStack *rs)
3640 if (rs == NULL || rs->bottom == 0)
3644 rs->refs [rs->bottom] = NULL;
3648 ref_stack_find (RefStack *rs, gpointer ptr)
3655 for (refs = rs->refs; refs && *refs; refs++) {
3663 * mono_thread_push_appdomain_ref:
3665 * Register that the current thread may have references to objects in domain
3666 * @domain on its stack. Each call to this function should be paired with a
3667 * call to pop_appdomain_ref.
3670 mono_thread_push_appdomain_ref (MonoDomain *domain)
3672 MonoInternalThread *thread = mono_thread_internal_current ();
3675 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3676 SPIN_LOCK (thread->lock_thread_id);
3677 if (thread->appdomain_refs == NULL)
3678 thread->appdomain_refs = ref_stack_new (16);
3679 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3680 SPIN_UNLOCK (thread->lock_thread_id);
3685 mono_thread_pop_appdomain_ref (void)
3687 MonoInternalThread *thread = mono_thread_internal_current ();
3690 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3691 SPIN_LOCK (thread->lock_thread_id);
3692 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3693 SPIN_UNLOCK (thread->lock_thread_id);
3698 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3701 SPIN_LOCK (thread->lock_thread_id);
3702 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3703 SPIN_UNLOCK (thread->lock_thread_id);
3708 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3710 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3713 typedef struct abort_appdomain_data {
3714 struct wait_data wait;
3716 } abort_appdomain_data;
3719 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3721 MonoInternalThread *thread = (MonoInternalThread*)value;
3722 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3723 MonoDomain *domain = data->domain;
3725 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3726 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3728 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3729 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3730 data->wait.threads [data->wait.num] = thread;
3733 /* Just ignore the rest, we can't do anything with
3741 * mono_threads_abort_appdomain_threads:
3743 * Abort threads which has references to the given appdomain.
3746 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3748 #ifdef __native_client__
3752 abort_appdomain_data user_data;
3754 int orig_timeout = timeout;
3757 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3759 start_time = mono_msec_ticks ();
3761 mono_threads_lock ();
3763 user_data.domain = domain;
3764 user_data.wait.num = 0;
3765 /* This shouldn't take any locks */
3766 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3767 mono_threads_unlock ();
3769 if (user_data.wait.num > 0) {
3770 /* Abort the threads outside the threads lock */
3771 for (i = 0; i < user_data.wait.num; ++i)
3772 mono_thread_internal_abort (user_data.wait.threads [i]);
3775 * We should wait for the threads either to abort, or to leave the
3776 * domain. We can't do the latter, so we wait with a timeout.
3778 wait_for_tids (&user_data.wait, 100, FALSE);
3781 /* Update remaining time */
3782 timeout -= mono_msec_ticks () - start_time;
3783 start_time = mono_msec_ticks ();
3785 if (orig_timeout != -1 && timeout < 0)
3788 while (user_data.wait.num > 0);
3790 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3796 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3798 MonoInternalThread *thread = (MonoInternalThread*)value;
3799 MonoDomain *domain = (MonoDomain*)user_data;
3802 /* No locking needed here */
3803 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3805 if (thread->cached_culture_info) {
3806 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3807 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3808 if (obj && obj->vtable->domain == domain)
3809 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3815 * mono_threads_clear_cached_culture:
3817 * Clear the cached_current_culture from all threads if it is in the
3821 mono_threads_clear_cached_culture (MonoDomain *domain)
3823 mono_threads_lock ();
3824 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3825 mono_threads_unlock ();
3829 * mono_thread_get_undeniable_exception:
3831 * Return an exception which needs to be raised when leaving a catch clause.
3832 * This is used for undeniable exception propagation.
3835 mono_thread_get_undeniable_exception (void)
3837 MonoInternalThread *thread = mono_thread_internal_current ();
3839 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3842 // We don't want to have our exception effect calls made by
3843 // the catching block
3845 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3849 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3850 * exception if the thread no longer references a dying appdomain.
3852 thread->abort_exc->trace_ips = NULL;
3853 thread->abort_exc->stack_trace = NULL;
3854 return thread->abort_exc;
3857 #if MONO_SMALL_CONFIG
3858 #define NUM_STATIC_DATA_IDX 4
3859 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3863 #define NUM_STATIC_DATA_IDX 8
3864 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3865 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3869 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3870 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3873 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3875 gpointer *static_data = (gpointer *)addr;
3877 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3878 void **ptr = (void **)static_data [i];
3883 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3884 void **p = ptr + idx;
3887 mark_func ((MonoObject**)p, gc_data);
3893 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3895 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3899 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3901 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3905 * mono_alloc_static_data
3907 * Allocate memory blocks for storing threads or context static data
3910 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3912 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3915 gpointer* static_data = *static_data_ptr;
3917 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3918 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3920 if (mono_gc_user_markers_supported ()) {
3921 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3922 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3924 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3925 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3928 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3929 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3930 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3931 *static_data_ptr = static_data;
3932 static_data [0] = static_data;
3935 for (i = 1; i <= idx; ++i) {
3936 if (static_data [i])
3939 if (mono_gc_user_markers_supported ())
3940 static_data [i] = g_malloc0 (static_data_size [i]);
3942 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3943 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3944 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3949 mono_free_static_data (gpointer* static_data)
3952 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3953 gpointer p = static_data [i];
3957 * At this point, the static data pointer array is still registered with the
3958 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3959 * data. Freeing the individual arrays without first nulling their slots
3960 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3961 * such an already freed array. See bug #13813.
3963 static_data [i] = NULL;
3964 mono_memory_write_barrier ();
3965 if (mono_gc_user_markers_supported ())
3968 mono_gc_free_fixed (p);
3970 mono_gc_free_fixed (static_data);
3974 * mono_init_static_data_info
3976 * Initializes static data counters
3978 static void mono_init_static_data_info (StaticDataInfo *static_data)
3980 static_data->idx = 0;
3981 static_data->offset = 0;
3982 static_data->freelist = NULL;
3986 * mono_alloc_static_data_slot
3988 * Generates an offset for static data. static_data contains the counters
3989 * used to generate it.
3992 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3994 if (!static_data->idx && !static_data->offset) {
3996 * we use the first chunk of the first allocation also as
3997 * an array for the rest of the data
3999 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4001 static_data->offset += align - 1;
4002 static_data->offset &= ~(align - 1);
4003 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4004 static_data->idx ++;
4005 g_assert (size <= static_data_size [static_data->idx]);
4006 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4007 static_data->offset = 0;
4009 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4010 static_data->offset += size;
4015 * LOCKING: requires that threads_mutex is held
4018 context_adjust_static_data (MonoAppContext *ctx)
4020 if (context_static_info.offset || context_static_info.idx > 0) {
4021 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4022 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4023 ctx->data->static_data = ctx->static_data;
4028 * LOCKING: requires that threads_mutex is held
4031 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4033 MonoInternalThread *thread = (MonoInternalThread *)value;
4034 guint32 offset = GPOINTER_TO_UINT (user);
4036 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4040 * LOCKING: requires that threads_mutex is held
4043 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4045 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4050 guint32 offset = GPOINTER_TO_UINT (user);
4051 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4052 ctx->data->static_data = ctx->static_data;
4055 static StaticDataFreeList*
4056 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4058 StaticDataFreeList* prev = NULL;
4059 StaticDataFreeList* tmp = static_data->freelist;
4061 if (tmp->size == size) {
4063 prev->next = tmp->next;
4065 static_data->freelist = tmp->next;
4074 #if SIZEOF_VOID_P == 4
4081 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4083 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4085 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4086 MonoBitSet *rb = sets [idx];
4087 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4088 offset /= sizeof (uintptr_t);
4089 /* offset is now the bitmap offset */
4090 for (int i = 0; i < numbits; ++i) {
4091 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4092 mono_bitset_set_fast (rb, offset + i);
4097 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4099 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4100 MonoBitSet *rb = sets [idx];
4101 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4102 offset /= sizeof (uintptr_t);
4103 /* offset is now the bitmap offset */
4104 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4105 mono_bitset_clear_fast (rb, offset + i);
4109 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4111 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4113 StaticDataInfo *info;
4116 if (static_type == SPECIAL_STATIC_THREAD) {
4117 info = &thread_static_info;
4118 sets = thread_reference_bitmaps;
4120 info = &context_static_info;
4121 sets = context_reference_bitmaps;
4124 mono_threads_lock ();
4126 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4130 offset = item->offset;
4133 offset = mono_alloc_static_data_slot (info, size, align);
4136 update_reference_bitmap (sets, offset, bitmap, numbits);
4138 if (static_type == SPECIAL_STATIC_THREAD) {
4139 /* This can be called during startup */
4140 if (threads != NULL)
4141 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4143 if (contexts != NULL)
4144 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4146 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4149 mono_threads_unlock ();
4155 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4157 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4159 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4160 return get_thread_static_data (thread, offset);
4162 return get_context_static_data (thread->current_appcontext, offset);
4167 mono_get_special_static_data (guint32 offset)
4169 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4178 * LOCKING: requires that threads_mutex is held
4181 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4183 MonoInternalThread *thread = (MonoInternalThread *)value;
4184 OffsetSize *data = (OffsetSize *)user;
4185 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4186 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4189 if (!thread->static_data || !thread->static_data [idx])
4191 ptr = ((char*) thread->static_data [idx]) + off;
4192 mono_gc_bzero_atomic (ptr, data->size);
4196 * LOCKING: requires that threads_mutex is held
4199 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4201 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4206 OffsetSize *data = (OffsetSize *)user;
4207 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4208 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4211 if (!ctx->static_data || !ctx->static_data [idx])
4214 ptr = ((char*) ctx->static_data [idx]) + off;
4215 mono_gc_bzero_atomic (ptr, data->size);
4219 do_free_special_slot (guint32 offset, guint32 size)
4221 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4223 StaticDataInfo *info;
4225 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4226 info = &thread_static_info;
4227 sets = thread_reference_bitmaps;
4229 info = &context_static_info;
4230 sets = context_reference_bitmaps;
4233 guint32 data_offset = offset;
4234 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4235 OffsetSize data = { data_offset, size };
4237 clear_reference_bitmap (sets, data.offset, data.size);
4239 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4240 if (threads != NULL)
4241 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4243 if (contexts != NULL)
4244 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4247 if (!mono_runtime_is_shutting_down ()) {
4248 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4250 item->offset = offset;
4253 item->next = info->freelist;
4254 info->freelist = item;
4259 do_free_special (gpointer key, gpointer value, gpointer data)
4261 MonoClassField *field = (MonoClassField *)key;
4262 guint32 offset = GPOINTER_TO_UINT (value);
4265 size = mono_type_size (field->type, &align);
4266 do_free_special_slot (offset, size);
4270 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4272 mono_threads_lock ();
4274 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4276 mono_threads_unlock ();
4280 static void CALLBACK dummy_apc (ULONG_PTR param)
4286 * mono_thread_execute_interruption
4288 * Performs the operation that the requested thread state requires (abort,
4291 static MonoException*
4292 mono_thread_execute_interruption (void)
4294 MonoInternalThread *thread = mono_thread_internal_current ();
4295 MonoThread *sys_thread = mono_thread_current ();
4297 LOCK_THREAD (thread);
4299 /* MonoThread::interruption_requested can only be changed with atomics */
4300 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4301 /* this will consume pending APC calls */
4303 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4305 InterlockedDecrement (&thread_interruption_requested);
4307 /* Clear the interrupted flag of the thread so it can wait again */
4308 mono_thread_info_clear_self_interrupt ();
4311 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4312 if (sys_thread->pending_exception) {
4315 exc = sys_thread->pending_exception;
4316 sys_thread->pending_exception = NULL;
4318 UNLOCK_THREAD (thread);
4320 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4321 UNLOCK_THREAD (thread);
4322 g_assert (sys_thread->pending_exception == NULL);
4323 if (thread->abort_exc == NULL) {
4325 * This might be racy, but it has to be called outside the lock
4326 * since it calls managed code.
4328 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4330 return thread->abort_exc;
4332 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4333 /* calls UNLOCK_THREAD (thread) */
4334 self_suspend_internal ();
4337 else if ((thread->state & ThreadState_StopRequested) != 0) {
4338 /* FIXME: do this through the JIT? */
4340 UNLOCK_THREAD (thread);
4342 mono_thread_exit ();
4344 } else if (thread->thread_interrupt_requested) {
4346 thread->thread_interrupt_requested = FALSE;
4347 UNLOCK_THREAD (thread);
4349 return(mono_get_exception_thread_interrupted ());
4352 UNLOCK_THREAD (thread);
4358 * mono_thread_request_interruption
4360 * A signal handler can call this method to request the interruption of a
4361 * thread. The result of the interruption will depend on the current state of
4362 * the thread. If the result is an exception that needs to be throw, it is
4363 * provided as return value.
4366 mono_thread_request_interruption (gboolean running_managed)
4368 MonoInternalThread *thread = mono_thread_internal_current ();
4370 /* The thread may already be stopping */
4375 if (thread->interrupt_on_stop &&
4376 thread->state & ThreadState_StopRequested &&
4377 thread->state & ThreadState_Background)
4380 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4382 InterlockedIncrement (&thread_interruption_requested);
4384 if (!running_managed || is_running_protected_wrapper ()) {
4385 /* Can't stop while in unmanaged code. Increase the global interruption
4386 request count. When exiting the unmanaged method the count will be
4387 checked and the thread will be interrupted. */
4389 /* this will awake the thread if it is in WaitForSingleObject
4391 /* Our implementation of this function ignores the func argument */
4393 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4395 mono_thread_info_self_interrupt ();
4400 return mono_thread_execute_interruption ();
4404 /*This function should be called by a thread after it has exited all of
4405 * its handle blocks at interruption time.*/
4407 mono_thread_resume_interruption (void)
4409 MonoInternalThread *thread = mono_thread_internal_current ();
4410 gboolean still_aborting;
4412 /* The thread may already be stopping */
4416 LOCK_THREAD (thread);
4417 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4418 UNLOCK_THREAD (thread);
4420 /*This can happen if the protected block called Thread::ResetAbort*/
4421 if (!still_aborting)
4424 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4426 InterlockedIncrement (&thread_interruption_requested);
4428 mono_thread_info_self_interrupt ();
4430 return mono_thread_execute_interruption ();
4433 gboolean mono_thread_interruption_requested ()
4435 if (thread_interruption_requested) {
4436 MonoInternalThread *thread = mono_thread_internal_current ();
4437 /* The thread may already be stopping */
4439 return (thread->interruption_requested);
4444 static MonoException*
4445 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4447 MonoInternalThread *thread = mono_thread_internal_current ();
4449 /* The thread may already be stopping */
4452 if (!thread->interruption_requested)
4454 if (!bypass_abort_protection && is_running_protected_wrapper ())
4457 return mono_thread_execute_interruption ();
4461 * Performs the interruption of the current thread, if one has been requested,
4462 * and the thread is not running a protected wrapper.
4463 * Return the exception which needs to be thrown, if any.
4466 mono_thread_interruption_checkpoint (void)
4468 return mono_thread_interruption_checkpoint_request (FALSE);
4472 * Performs the interruption of the current thread, if one has been requested.
4473 * Return the exception which needs to be thrown, if any.
4476 mono_thread_force_interruption_checkpoint_noraise (void)
4478 return mono_thread_interruption_checkpoint_request (TRUE);
4482 * mono_set_pending_exception:
4484 * Set the pending exception of the current thread to EXC.
4485 * The exception will be thrown when execution returns to managed code.
4488 mono_set_pending_exception (MonoException *exc)
4490 MonoThread *thread = mono_thread_current ();
4492 /* The thread may already be stopping */
4496 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4498 mono_thread_request_interruption (FALSE);
4502 * mono_thread_interruption_request_flag:
4504 * Returns the address of a flag that will be non-zero if an interruption has
4505 * been requested for a thread. The thread to interrupt may not be the current
4506 * thread, so an additional call to mono_thread_interruption_requested() or
4507 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4510 gint32* mono_thread_interruption_request_flag ()
4512 return &thread_interruption_requested;
4516 mono_thread_init_apartment_state (void)
4519 MonoInternalThread* thread = mono_thread_internal_current ();
4521 /* Positive return value indicates success, either
4522 * S_OK if this is first CoInitialize call, or
4523 * S_FALSE if CoInitialize already called, but with same
4524 * threading model. A negative value indicates failure,
4525 * probably due to trying to change the threading model.
4527 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4528 ? COINIT_APARTMENTTHREADED
4529 : COINIT_MULTITHREADED) < 0) {
4530 thread->apartment_state = ThreadApartmentState_Unknown;
4536 mono_thread_cleanup_apartment_state (void)
4539 MonoInternalThread* thread = mono_thread_internal_current ();
4541 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4548 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4550 LOCK_THREAD (thread);
4551 thread->state |= state;
4552 UNLOCK_THREAD (thread);
4556 * mono_thread_test_and_set_state:
4558 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4560 * Returns TRUE is @set was OR'd in.
4563 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4565 LOCK_THREAD (thread);
4567 if ((thread->state & test) != 0) {
4568 UNLOCK_THREAD (thread);
4572 thread->state |= set;
4573 UNLOCK_THREAD (thread);
4579 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4581 LOCK_THREAD (thread);
4582 thread->state &= ~state;
4583 UNLOCK_THREAD (thread);
4587 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4589 gboolean ret = FALSE;
4591 LOCK_THREAD (thread);
4593 if ((thread->state & test) != 0) {
4597 UNLOCK_THREAD (thread);
4602 static gboolean has_tls_get = FALSE;
4605 mono_runtime_set_has_tls_get (gboolean val)
4611 mono_runtime_has_tls_get (void)
4617 self_interrupt_thread (void *_unused)
4620 MonoThreadInfo *info;
4622 exc = mono_thread_execute_interruption ();
4624 if (mono_threads_is_coop_enabled ()) {
4625 /* We can return from an async call in coop, as
4626 * it's simply called when exiting the safepoint */
4630 g_error ("%s: we can't resume from an async call", __func__);
4633 info = mono_thread_info_current ();
4635 /* We must use _with_context since we didn't trampoline into the runtime */
4636 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. */
4640 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4644 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4648 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4650 MonoJitInfo **dest = (MonoJitInfo **)data;
4656 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4658 MonoJitInfo *ji = NULL;
4663 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4664 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4665 * where we hold runtime locks.
4667 if (!mono_threads_is_coop_enabled ())
4668 mono_thread_info_set_is_async_context (TRUE);
4669 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4670 if (!mono_threads_is_coop_enabled ())
4671 mono_thread_info_set_is_async_context (FALSE);
4676 MonoInternalThread *thread;
4677 gboolean install_async_abort;
4678 MonoThreadInfoInterruptToken *interrupt_token;
4681 static SuspendThreadResult
4682 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4684 AbortThreadData *data = (AbortThreadData *)ud;
4685 MonoInternalThread *thread = data->thread;
4686 MonoJitInfo *ji = NULL;
4687 gboolean protected_wrapper;
4688 gboolean running_managed;
4690 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4691 return MonoResumeThread;
4694 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4695 The protected block code will give them a chance when appropriate.
4697 if (thread->abort_protected_block_count)
4698 return MonoResumeThread;
4700 /*someone is already interrupting it*/
4701 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4702 return MonoResumeThread;
4704 InterlockedIncrement (&thread_interruption_requested);
4706 ji = mono_thread_info_get_last_managed (info);
4707 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4708 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4710 if (!protected_wrapper && running_managed) {
4711 /*We are in managed code*/
4712 /*Set the thread to call */
4713 if (data->install_async_abort)
4714 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4715 return MonoResumeThread;
4718 * This will cause waits to be broken.
4719 * It will also prevent the thread from entering a wait, so if the thread returns
4720 * from the wait before it receives the abort signal, it will just spin in the wait
4721 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4724 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4726 return MonoResumeThread;
4731 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4733 AbortThreadData data;
4735 g_assert (thread != mono_thread_internal_current ());
4737 data.thread = thread;
4738 data.install_async_abort = install_async_abort;
4739 data.interrupt_token = NULL;
4741 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4742 if (data.interrupt_token)
4743 mono_thread_info_finish_interrupt (data.interrupt_token);
4744 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4748 self_abort_internal (MonoError *error)
4752 mono_error_init (error);
4754 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4755 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4758 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.
4760 exc = mono_thread_request_interruption (TRUE);
4762 mono_error_set_exception_instance (error, exc);
4764 mono_thread_info_self_interrupt ();
4768 MonoInternalThread *thread;
4770 MonoThreadInfoInterruptToken *interrupt_token;
4771 } SuspendThreadData;
4773 static SuspendThreadResult
4774 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4776 SuspendThreadData *data = (SuspendThreadData *)ud;
4777 MonoInternalThread *thread = data->thread;
4778 MonoJitInfo *ji = NULL;
4779 gboolean protected_wrapper;
4780 gboolean running_managed;
4782 ji = mono_thread_info_get_last_managed (info);
4783 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4784 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4786 if (running_managed && !protected_wrapper) {
4787 if (mono_threads_is_coop_enabled ()) {
4788 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4789 return MonoResumeThread;
4791 thread->state &= ~ThreadState_SuspendRequested;
4792 thread->state |= ThreadState_Suspended;
4793 return KeepSuspended;
4796 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4797 InterlockedIncrement (&thread_interruption_requested);
4798 if (data->interrupt)
4799 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4801 return MonoResumeThread;
4805 /* LOCKING: called with @thread synch_cs held, and releases it */
4807 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4809 SuspendThreadData data;
4811 g_assert (thread != mono_thread_internal_current ());
4813 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4815 thread->self_suspended = FALSE;
4817 data.thread = thread;
4818 data.interrupt = interrupt;
4819 data.interrupt_token = NULL;
4821 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4822 if (data.interrupt_token)
4823 mono_thread_info_finish_interrupt (data.interrupt_token);
4825 UNLOCK_THREAD (thread);
4828 /* LOCKING: called with @thread synch_cs held, and releases it */
4830 self_suspend_internal (void)
4832 MonoInternalThread *thread;
4834 MonoOSEventWaitRet res;
4836 thread = mono_thread_internal_current ();
4838 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4840 thread->self_suspended = TRUE;
4842 thread->state &= ~ThreadState_SuspendRequested;
4843 thread->state |= ThreadState_Suspended;
4845 UNLOCK_THREAD (thread);
4847 event = thread->suspended;
4850 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT);
4851 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4856 * mono_thread_is_foreign:
4857 * @thread: the thread to query
4859 * This function allows one to determine if a thread was created by the mono runtime and has
4860 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4862 * Returns: TRUE if @thread was not created by the runtime.
4865 mono_thread_is_foreign (MonoThread *thread)
4867 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4868 return info->runtime_thread == FALSE;
4872 * mono_add_joinable_thread:
4874 * Add TID to the list of joinable threads.
4875 * LOCKING: Acquires the threads lock.
4878 mono_threads_add_joinable_thread (gpointer tid)
4882 * We cannot detach from threads because it causes problems like
4883 * 2fd16f60/r114307. So we collect them and join them when
4884 * we have time (in he finalizer thread).
4886 joinable_threads_lock ();
4887 if (!joinable_threads)
4888 joinable_threads = g_hash_table_new (NULL, NULL);
4889 g_hash_table_insert (joinable_threads, tid, tid);
4890 joinable_thread_count ++;
4891 joinable_threads_unlock ();
4893 mono_gc_finalize_notify ();
4898 * mono_threads_join_threads:
4900 * Join all joinable threads. This is called from the finalizer thread.
4901 * LOCKING: Acquires the threads lock.
4904 mono_threads_join_threads (void)
4907 GHashTableIter iter;
4914 if (!joinable_thread_count)
4918 joinable_threads_lock ();
4920 if (g_hash_table_size (joinable_threads)) {
4921 g_hash_table_iter_init (&iter, joinable_threads);
4922 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4923 thread = (pthread_t)tid;
4924 g_hash_table_remove (joinable_threads, key);
4925 joinable_thread_count --;
4928 joinable_threads_unlock ();
4930 if (thread != pthread_self ()) {
4932 /* This shouldn't block */
4933 mono_native_thread_join (thread);
4946 * Wait for thread TID to exit.
4947 * LOCKING: Acquires the threads lock.
4950 mono_thread_join (gpointer tid)
4954 gboolean found = FALSE;
4956 joinable_threads_lock ();
4957 if (!joinable_threads)
4958 joinable_threads = g_hash_table_new (NULL, NULL);
4959 if (g_hash_table_lookup (joinable_threads, tid)) {
4960 g_hash_table_remove (joinable_threads, tid);
4961 joinable_thread_count --;
4964 joinable_threads_unlock ();
4967 thread = (pthread_t)tid;
4969 mono_native_thread_join (thread);
4975 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4977 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4978 mono_thread_interruption_checkpoint ();
4982 mono_thread_internal_unhandled_exception (MonoObject* exc)
4984 MonoClass *klass = exc->vtable->klass;
4985 if (is_threadabort_exception (klass)) {
4986 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4987 } else if (!is_appdomainunloaded_exception (klass)
4988 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4989 mono_unhandled_exception (exc);
4990 if (mono_environment_exitcode_get () == 1) {
4991 mono_environment_exitcode_set (255);
4992 mono_invoke_unhandled_exception_hook (exc);
4993 g_assert_not_reached ();
4999 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5002 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5003 mono_error_set_pending_exception (&error);
5007 * mono_threads_attach_coop: called by native->managed wrappers
5011 * - @return: the original domain which needs to be restored, or NULL.
5014 * - @dummy: contains the original domain
5015 * - @return: a cookie containing current MonoThreadInfo*.
5018 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5021 gboolean fresh_thread = FALSE;
5024 /* Happens when called from AOTed code which is only used in the root domain. */
5025 domain = mono_get_root_domain ();
5030 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5031 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5032 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5033 * we're only responsible for making the cookie. */
5034 if (mono_threads_is_coop_enabled ()) {
5035 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5036 fresh_thread = !info || !mono_thread_info_is_live (info);
5039 if (!mono_thread_internal_current ()) {
5040 mono_thread_attach_full (domain, FALSE);
5043 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5046 orig = mono_domain_get ();
5048 mono_domain_set (domain, TRUE);
5050 if (!mono_threads_is_coop_enabled ())
5051 return orig != domain ? orig : NULL;
5055 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5056 * return the right cookie. */
5057 return mono_threads_enter_gc_unsafe_region_cookie ();
5060 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5061 return mono_threads_enter_gc_unsafe_region (dummy);
5066 * mono_threads_detach_coop: called by native->managed wrappers
5069 * - @cookie: the original domain which needs to be restored, or NULL.
5073 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5074 * - @dummy: contains the original domain
5077 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5079 MonoDomain *domain, *orig;
5081 if (!mono_threads_is_coop_enabled ()) {
5082 orig = (MonoDomain*) cookie;
5084 mono_domain_set (orig, TRUE);
5086 orig = (MonoDomain*) *dummy;
5088 domain = mono_domain_get ();
5091 /* it won't do anything if cookie is NULL
5092 * thread state RUNNING -> (RUNNING|BLOCKING) */
5093 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5095 if (orig != domain) {
5097 mono_domain_unset ();
5099 mono_domain_set (orig, TRUE);
5105 mono_threads_begin_abort_protected_block (void)
5107 MonoInternalThread *thread;
5109 thread = mono_thread_internal_current ();
5110 ++thread->abort_protected_block_count;
5111 mono_memory_barrier ();
5115 mono_threads_end_abort_protected_block (void)
5117 MonoInternalThread *thread;
5119 thread = mono_thread_internal_current ();
5121 mono_memory_barrier ();
5122 --thread->abort_protected_block_count;
5126 mono_thread_try_resume_interruption (void)
5128 MonoInternalThread *thread;
5130 thread = mono_thread_internal_current ();
5131 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5134 return mono_thread_resume_interruption ();
5138 /* Returns TRUE if the current thread is ready to be interrupted. */
5140 mono_threads_is_ready_to_be_interrupted (void)
5142 MonoInternalThread *thread;
5144 thread = mono_thread_internal_current ();
5145 LOCK_THREAD (thread);
5146 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5147 UNLOCK_THREAD (thread);
5151 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5152 UNLOCK_THREAD (thread);
5156 UNLOCK_THREAD (thread);
5162 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5164 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5166 if (internal->thread_info) {
5167 g_string_append (text, ", state : ");
5168 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5171 if (internal->owned_mutexes) {
5174 g_string_append (text, ", owns : [");
5175 for (i = 0; i < internal->owned_mutexes->len; i++)
5176 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5177 g_string_append (text, "]");
5182 mono_thread_internal_is_current (MonoInternalThread *internal)
5184 g_assert (internal);
5185 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));