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);
1328 // FIXME: !MONO_INFINITE_WAIT
1329 if (ms != MONO_INFINITE_WAIT)
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);
1641 ms=MONO_INFINITE_WAIT;
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 (MonoW32HandleWaitRet val, gsize numobjects)
1669 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1670 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1671 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1672 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1673 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1674 return WAIT_IO_COMPLETION;
1675 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1676 return WAIT_TIMEOUT;
1677 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1678 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1679 return MANAGED_WAIT_FAILED;
1681 g_error ("%s: unknown val value %d", __func__, val);
1685 static MonoW32HandleWaitRet
1686 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1689 MonoW32HandleWaitRet ret;
1694 mono_error_init (error);
1696 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1700 if (numhandles != 1)
1701 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1703 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1705 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1706 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1707 #endif /* HOST_WIN32 */
1710 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1713 exc = mono_thread_execute_interruption ();
1715 mono_error_set_exception_instance (error, exc);
1722 /* Re-calculate ms according to the time passed */
1723 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1724 if (diff_ms >= ms) {
1725 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1728 wait = ms - diff_ms;
1734 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1739 MonoW32HandleWaitRet ret;
1741 MonoObject *waitHandle;
1742 MonoInternalThread *thread = mono_thread_internal_current ();
1744 /* Do this WaitSleepJoin check before creating objects */
1745 if (mono_thread_current_check_pending_interrupt ())
1746 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1748 /* We fail in managed if the array has more than 64 elements */
1749 numhandles = (guint32)mono_array_length(mono_handles);
1750 handles = g_new0(HANDLE, numhandles);
1752 for(i = 0; i < numhandles; i++) {
1753 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1754 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1758 ms=MONO_INFINITE_WAIT;
1761 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1763 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1765 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1769 mono_error_set_pending_exception (&error);
1771 return map_native_wait_result_to_managed (ret, numhandles);
1774 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1777 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1778 uintptr_t numhandles;
1779 MonoW32HandleWaitRet ret;
1781 MonoObject *waitHandle;
1782 MonoInternalThread *thread = mono_thread_internal_current ();
1784 /* Do this WaitSleepJoin check before creating objects */
1785 if (mono_thread_current_check_pending_interrupt ())
1786 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1788 numhandles = mono_array_length(mono_handles);
1789 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1790 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1792 for(i = 0; i < numhandles; i++) {
1793 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1794 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1798 ms=MONO_INFINITE_WAIT;
1801 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1803 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1805 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1807 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1809 mono_error_set_pending_exception (&error);
1811 return map_native_wait_result_to_managed (ret, numhandles);
1814 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1817 MonoW32HandleWaitRet ret;
1818 MonoInternalThread *thread = mono_thread_internal_current ();
1820 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1823 ms=MONO_INFINITE_WAIT;
1826 if (mono_thread_current_check_pending_interrupt ())
1827 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1829 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1831 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1833 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1835 mono_error_set_pending_exception (&error);
1836 return map_native_wait_result_to_managed (ret, 1);
1840 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1842 MonoW32HandleWaitRet ret;
1843 MonoInternalThread *thread = mono_thread_internal_current ();
1846 ms = MONO_INFINITE_WAIT;
1848 if (mono_thread_current_check_pending_interrupt ())
1849 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1851 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1855 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1857 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1861 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1863 return map_native_wait_result_to_managed (ret, 1);
1866 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1868 return InterlockedIncrement (location);
1871 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1873 #if SIZEOF_VOID_P == 4
1874 if (G_UNLIKELY ((size_t)location & 0x7)) {
1876 mono_interlocked_lock ();
1879 mono_interlocked_unlock ();
1883 return InterlockedIncrement64 (location);
1886 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1888 return InterlockedDecrement(location);
1891 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1893 #if SIZEOF_VOID_P == 4
1894 if (G_UNLIKELY ((size_t)location & 0x7)) {
1896 mono_interlocked_lock ();
1899 mono_interlocked_unlock ();
1903 return InterlockedDecrement64 (location);
1906 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1908 return InterlockedExchange(location, value);
1911 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1914 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1915 mono_gc_wbarrier_generic_nostore (location);
1919 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1921 return InterlockedExchangePointer(location, value);
1924 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1926 IntFloatUnion val, ret;
1929 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1935 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1937 #if SIZEOF_VOID_P == 4
1938 if (G_UNLIKELY ((size_t)location & 0x7)) {
1940 mono_interlocked_lock ();
1943 mono_interlocked_unlock ();
1947 return InterlockedExchange64 (location, value);
1951 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1953 LongDoubleUnion val, ret;
1956 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1961 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1963 return InterlockedCompareExchange(location, value, comparand);
1966 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1968 gint32 r = InterlockedCompareExchange(location, value, comparand);
1969 *success = r == comparand;
1973 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1976 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1977 mono_gc_wbarrier_generic_nostore (location);
1981 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1983 return InterlockedCompareExchangePointer(location, value, comparand);
1986 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1988 IntFloatUnion val, ret, cmp;
1991 cmp.fval = comparand;
1992 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1998 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2000 #if SIZEOF_VOID_P == 8
2001 LongDoubleUnion val, comp, ret;
2004 comp.fval = comparand;
2005 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2011 mono_interlocked_lock ();
2013 if (old == comparand)
2015 mono_interlocked_unlock ();
2022 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2024 #if SIZEOF_VOID_P == 4
2025 if (G_UNLIKELY ((size_t)location & 0x7)) {
2027 mono_interlocked_lock ();
2029 if (old == comparand)
2031 mono_interlocked_unlock ();
2035 return InterlockedCompareExchange64 (location, value, comparand);
2039 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2042 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2043 mono_gc_wbarrier_generic_nostore (location);
2048 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2051 MONO_CHECK_NULL (location, NULL);
2052 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2053 mono_gc_wbarrier_generic_nostore (location);
2058 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2060 return InterlockedAdd (location, value);
2064 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2066 #if SIZEOF_VOID_P == 4
2067 if (G_UNLIKELY ((size_t)location & 0x7)) {
2069 mono_interlocked_lock ();
2072 mono_interlocked_unlock ();
2076 return InterlockedAdd64 (location, value);
2080 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2082 #if SIZEOF_VOID_P == 4
2083 if (G_UNLIKELY ((size_t)location & 0x7)) {
2085 mono_interlocked_lock ();
2087 mono_interlocked_unlock ();
2091 return InterlockedRead64 (location);
2095 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2097 mono_memory_barrier ();
2101 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2103 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2105 if (state & ThreadState_Background) {
2106 /* If the thread changes the background mode, the main thread has to
2107 * be notified, since it has to rebuild the list of threads to
2110 mono_os_event_set (&background_change_event);
2115 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2117 mono_thread_set_state (this_obj, (MonoThreadState)state);
2119 if (state & ThreadState_Background) {
2120 /* If the thread changes the background mode, the main thread has to
2121 * be notified, since it has to rebuild the list of threads to
2124 mono_os_event_set (&background_change_event);
2129 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2133 LOCK_THREAD (this_obj);
2135 state = this_obj->state;
2137 UNLOCK_THREAD (this_obj);
2142 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2144 MonoInternalThread *current;
2146 MonoInternalThread *thread = this_obj->internal_thread;
2148 LOCK_THREAD (thread);
2150 current = mono_thread_internal_current ();
2152 thread->thread_interrupt_requested = TRUE;
2153 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2155 UNLOCK_THREAD (thread);
2158 async_abort_internal (thread, FALSE);
2163 * mono_thread_current_check_pending_interrupt:
2165 * Checks if there's a interruption request and set the pending exception if so.
2167 * @returns true if a pending exception was set
2170 mono_thread_current_check_pending_interrupt (void)
2172 MonoInternalThread *thread = mono_thread_internal_current ();
2173 gboolean throw_ = FALSE;
2175 LOCK_THREAD (thread);
2177 if (thread->thread_interrupt_requested) {
2179 thread->thread_interrupt_requested = FALSE;
2182 UNLOCK_THREAD (thread);
2185 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2190 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2192 LOCK_THREAD (thread);
2194 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2195 (thread->state & ThreadState_StopRequested) != 0 ||
2196 (thread->state & ThreadState_Stopped) != 0)
2198 UNLOCK_THREAD (thread);
2202 if ((thread->state & ThreadState_Unstarted) != 0) {
2203 thread->state |= ThreadState_Aborted;
2204 UNLOCK_THREAD (thread);
2208 thread->state |= ThreadState_AbortRequested;
2209 if (thread->abort_state_handle)
2210 mono_gchandle_free (thread->abort_state_handle);
2212 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2213 g_assert (thread->abort_state_handle);
2215 thread->abort_state_handle = 0;
2217 thread->abort_exc = NULL;
2219 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));
2221 /* During shutdown, we can't wait for other threads */
2223 /* Make sure the thread is awake */
2224 mono_thread_resume (thread);
2226 UNLOCK_THREAD (thread);
2231 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2233 if (!request_thread_abort (thread, state))
2236 if (thread == mono_thread_internal_current ()) {
2238 self_abort_internal (&error);
2239 mono_error_set_pending_exception (&error);
2241 async_abort_internal (thread, TRUE);
2246 * mono_thread_internal_abort:
2248 * Request thread @thread to be aborted.
2250 * @thread MUST NOT be the current thread.
2253 mono_thread_internal_abort (MonoInternalThread *thread)
2255 g_assert (thread != mono_thread_internal_current ());
2257 if (!request_thread_abort (thread, NULL))
2259 async_abort_internal (thread, TRUE);
2263 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2265 MonoInternalThread *thread = mono_thread_internal_current ();
2266 gboolean was_aborting;
2268 LOCK_THREAD (thread);
2269 was_aborting = thread->state & ThreadState_AbortRequested;
2270 thread->state &= ~ThreadState_AbortRequested;
2271 UNLOCK_THREAD (thread);
2273 if (!was_aborting) {
2274 const char *msg = "Unable to reset abort because no abort was requested";
2275 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2279 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2280 thread->abort_exc = NULL;
2281 if (thread->abort_state_handle) {
2282 mono_gchandle_free (thread->abort_state_handle);
2283 /* This is actually not necessary - the handle
2284 only counts if the exception is set */
2285 thread->abort_state_handle = 0;
2290 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2292 LOCK_THREAD (thread);
2294 thread->state &= ~ThreadState_AbortRequested;
2296 if (thread->abort_exc) {
2297 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2298 thread->abort_exc = NULL;
2299 if (thread->abort_state_handle) {
2300 mono_gchandle_free (thread->abort_state_handle);
2301 /* This is actually not necessary - the handle
2302 only counts if the exception is set */
2303 thread->abort_state_handle = 0;
2307 UNLOCK_THREAD (thread);
2311 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2314 MonoInternalThread *thread = this_obj->internal_thread;
2315 MonoObject *state, *deserialized = NULL;
2318 if (!thread->abort_state_handle)
2321 state = mono_gchandle_get_target (thread->abort_state_handle);
2324 domain = mono_domain_get ();
2325 if (mono_object_domain (state) == domain)
2328 deserialized = mono_object_xdomain_representation (state, domain, &error);
2330 if (!deserialized) {
2331 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2332 if (!is_ok (&error)) {
2333 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2334 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2336 mono_set_pending_exception (invalid_op_exc);
2340 return deserialized;
2344 mono_thread_suspend (MonoInternalThread *thread)
2346 LOCK_THREAD (thread);
2348 if ((thread->state & ThreadState_Unstarted) != 0 ||
2349 (thread->state & ThreadState_Aborted) != 0 ||
2350 (thread->state & ThreadState_Stopped) != 0)
2352 UNLOCK_THREAD (thread);
2356 if ((thread->state & ThreadState_Suspended) != 0 ||
2357 (thread->state & ThreadState_SuspendRequested) != 0 ||
2358 (thread->state & ThreadState_StopRequested) != 0)
2360 UNLOCK_THREAD (thread);
2364 thread->state |= ThreadState_SuspendRequested;
2365 mono_os_event_reset (thread->suspended);
2367 if (thread == mono_thread_internal_current ()) {
2368 /* calls UNLOCK_THREAD (thread) */
2369 self_suspend_internal ();
2371 /* calls UNLOCK_THREAD (thread) */
2372 async_suspend_internal (thread, FALSE);
2379 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2381 if (!mono_thread_suspend (this_obj->internal_thread)) {
2382 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2387 /* LOCKING: LOCK_THREAD(thread) must be held */
2389 mono_thread_resume (MonoInternalThread *thread)
2391 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2392 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2393 thread->state &= ~ThreadState_SuspendRequested;
2394 mono_os_event_set (thread->suspended);
2398 if ((thread->state & ThreadState_Suspended) == 0 ||
2399 (thread->state & ThreadState_Unstarted) != 0 ||
2400 (thread->state & ThreadState_Aborted) != 0 ||
2401 (thread->state & ThreadState_Stopped) != 0)
2403 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2407 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2409 mono_os_event_set (thread->suspended);
2411 if (!thread->self_suspended) {
2412 UNLOCK_THREAD (thread);
2414 /* Awake the thread */
2415 if (!mono_thread_info_resume (thread_get_tid (thread)))
2418 LOCK_THREAD (thread);
2421 thread->state &= ~ThreadState_Suspended;
2427 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2429 if (!thread->internal_thread) {
2430 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2432 LOCK_THREAD (thread->internal_thread);
2433 if (!mono_thread_resume (thread->internal_thread))
2434 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2435 UNLOCK_THREAD (thread->internal_thread);
2440 mono_threads_is_critical_method (MonoMethod *method)
2442 switch (method->wrapper_type) {
2443 case MONO_WRAPPER_RUNTIME_INVOKE:
2444 case MONO_WRAPPER_XDOMAIN_INVOKE:
2445 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2452 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2457 if (mono_threads_is_critical_method (m)) {
2458 *((gboolean*)data) = TRUE;
2465 is_running_protected_wrapper (void)
2467 gboolean found = FALSE;
2468 mono_stack_walk (find_wrapper, &found);
2473 request_thread_stop (MonoInternalThread *thread)
2475 LOCK_THREAD (thread);
2477 if ((thread->state & ThreadState_StopRequested) != 0 ||
2478 (thread->state & ThreadState_Stopped) != 0)
2480 UNLOCK_THREAD (thread);
2484 /* Make sure the thread is awake */
2485 mono_thread_resume (thread);
2487 thread->state |= ThreadState_StopRequested;
2488 thread->state &= ~ThreadState_AbortRequested;
2490 UNLOCK_THREAD (thread);
2495 * mono_thread_internal_stop:
2497 * Request thread @thread to stop.
2499 * @thread MUST NOT be the current thread.
2502 mono_thread_internal_stop (MonoInternalThread *thread)
2504 g_assert (thread != mono_thread_internal_current ());
2506 if (!request_thread_stop (thread))
2509 async_abort_internal (thread, TRUE);
2512 void mono_thread_stop (MonoThread *thread)
2514 MonoInternalThread *internal = thread->internal_thread;
2516 if (!request_thread_stop (internal))
2519 if (internal == mono_thread_internal_current ()) {
2521 self_abort_internal (&error);
2523 This function is part of the embeding API and has no way to return the exception
2524 to be thrown. So what we do is keep the old behavior and raise the exception.
2526 mono_error_raise_exception (&error); /* OK to throw, see note */
2528 async_abort_internal (internal, TRUE);
2533 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2535 gint8 tmp = *(volatile gint8 *)ptr;
2536 mono_memory_barrier ();
2541 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2543 gint16 tmp = *(volatile gint16 *)ptr;
2544 mono_memory_barrier ();
2549 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2551 gint32 tmp = *(volatile gint32 *)ptr;
2552 mono_memory_barrier ();
2557 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2559 gint64 tmp = *(volatile gint64 *)ptr;
2560 mono_memory_barrier ();
2565 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2567 volatile void *tmp = *(volatile void **)ptr;
2568 mono_memory_barrier ();
2569 return (void *) tmp;
2573 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2575 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2576 mono_memory_barrier ();
2577 return (MonoObject *) tmp;
2581 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2583 double tmp = *(volatile double *)ptr;
2584 mono_memory_barrier ();
2589 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2591 float tmp = *(volatile float *)ptr;
2592 mono_memory_barrier ();
2597 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2599 return InterlockedRead8 ((volatile gint8 *)ptr);
2603 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2605 return InterlockedRead16 ((volatile gint16 *)ptr);
2609 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2611 return InterlockedRead ((volatile gint32 *)ptr);
2615 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2617 #if SIZEOF_VOID_P == 4
2618 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2620 mono_interlocked_lock ();
2621 val = *(gint64*)ptr;
2622 mono_interlocked_unlock ();
2626 return InterlockedRead64 ((volatile gint64 *)ptr);
2630 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2632 return InterlockedReadPointer ((volatile gpointer *)ptr);
2636 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2640 #if SIZEOF_VOID_P == 4
2641 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2643 mono_interlocked_lock ();
2644 val = *(double*)ptr;
2645 mono_interlocked_unlock ();
2650 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2656 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2660 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2666 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2668 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2672 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2674 mono_memory_barrier ();
2675 *(volatile gint8 *)ptr = value;
2679 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2681 mono_memory_barrier ();
2682 *(volatile gint16 *)ptr = value;
2686 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2688 mono_memory_barrier ();
2689 *(volatile gint32 *)ptr = value;
2693 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2695 mono_memory_barrier ();
2696 *(volatile gint64 *)ptr = value;
2700 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2702 mono_memory_barrier ();
2703 *(volatile void **)ptr = value;
2707 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2709 mono_memory_barrier ();
2710 mono_gc_wbarrier_generic_store (ptr, value);
2714 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2716 mono_memory_barrier ();
2717 *(volatile double *)ptr = value;
2721 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2723 mono_memory_barrier ();
2724 *(volatile float *)ptr = value;
2728 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2730 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2734 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2736 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2740 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2742 InterlockedWrite ((volatile gint32 *)ptr, value);
2746 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2748 #if SIZEOF_VOID_P == 4
2749 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2750 mono_interlocked_lock ();
2751 *(gint64*)ptr = value;
2752 mono_interlocked_unlock ();
2757 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2761 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2763 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2767 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2771 #if SIZEOF_VOID_P == 4
2772 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2773 mono_interlocked_lock ();
2774 *(double*)ptr = value;
2775 mono_interlocked_unlock ();
2782 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2786 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2792 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2796 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2798 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2802 free_context (void *user_data)
2804 ContextStaticData *data = user_data;
2806 mono_threads_lock ();
2809 * There is no guarantee that, by the point this reference queue callback
2810 * has been invoked, the GC handle associated with the object will fail to
2811 * resolve as one might expect. So if we don't free and remove the GC
2812 * handle here, free_context_static_data_helper () could end up resolving
2813 * a GC handle to an actually-dead context which would contain a pointer
2814 * to an already-freed static data segment, resulting in a crash when
2817 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2819 mono_threads_unlock ();
2821 mono_gchandle_free (data->gc_handle);
2822 mono_free_static_data (data->static_data);
2827 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2829 mono_threads_lock ();
2831 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2834 contexts = g_hash_table_new (NULL, NULL);
2837 context_queue = mono_gc_reference_queue_new (free_context);
2839 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2840 g_hash_table_insert (contexts, gch, gch);
2843 * We use this intermediate structure to contain a duplicate pointer to
2844 * the static data because we can't rely on being able to resolve the GC
2845 * handle in the reference queue callback.
2847 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2848 data->gc_handle = GPOINTER_TO_UINT (gch);
2851 context_adjust_static_data (ctx);
2852 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2854 mono_threads_unlock ();
2856 mono_profiler_context_loaded (ctx);
2860 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2863 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2864 * cleanup in exceptional circumstances, we don't actually do any
2865 * cleanup work here. We instead do this via a reference queue.
2868 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2870 mono_profiler_context_unloaded (ctx);
2874 mono_thread_init_tls (void)
2876 MONO_FAST_TLS_INIT (tls_current_object);
2877 mono_native_tls_alloc (¤t_object_key, NULL);
2880 void mono_thread_init (MonoThreadStartCB start_cb,
2881 MonoThreadAttachCB attach_cb)
2883 mono_coop_mutex_init_recursive (&threads_mutex);
2885 mono_os_mutex_init_recursive(&interlocked_mutex);
2886 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2888 mono_os_event_init (&background_change_event, FALSE);
2890 mono_init_static_data_info (&thread_static_info);
2891 mono_init_static_data_info (&context_static_info);
2893 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2895 mono_thread_start_cb = start_cb;
2896 mono_thread_attach_cb = attach_cb;
2899 void mono_thread_cleanup (void)
2901 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
2902 /* The main thread must abandon any held mutexes (particularly
2903 * important for named mutexes as they are shared across
2904 * processes, see bug 74680.) This will happen when the
2905 * thread exits, but if it's not running in a subthread it
2906 * won't exit in time.
2908 mono_w32mutex_abandon ();
2912 /* This stuff needs more testing, it seems one of these
2913 * critical sections can be locked when mono_thread_cleanup is
2916 mono_coop_mutex_destroy (&threads_mutex);
2917 mono_os_mutex_destroy (&interlocked_mutex);
2918 mono_os_mutex_destroy (&delayed_free_table_mutex);
2919 mono_os_mutex_destroy (&small_id_mutex);
2920 mono_os_event_destroy (&background_change_event);
2923 mono_native_tls_free (current_object_key);
2927 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2929 mono_thread_cleanup_fn = func;
2933 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2935 thread->internal_thread->manage_callback = func;
2939 static void print_tids (gpointer key, gpointer value, gpointer user)
2941 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2942 * sizeof(uint) and a cast to uint would overflow
2944 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2945 * print this as a pointer.
2947 g_message ("Waiting for: %p", key);
2952 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2953 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2958 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
2961 MonoThreadInfoWaitRet ret;
2963 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2965 /* Add the thread state change event, so it wakes
2966 * up if a thread changes to background mode. */
2969 if (check_state_change)
2970 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
2972 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
2975 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
2976 /* See the comment in build_wait_tids() */
2977 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2981 for( i = 0; i < wait->num; i++)
2982 mono_threads_close_thread_handle (wait->handles [i]);
2984 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
2987 if (ret < wait->num) {
2988 MonoInternalThread *internal;
2990 internal = wait->threads [ret];
2992 mono_threads_lock ();
2993 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
2994 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
2995 mono_threads_unlock ();
2999 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3001 struct wait_data *wait=(struct wait_data *)user;
3003 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3004 MonoInternalThread *thread=(MonoInternalThread *)value;
3006 /* Ignore background threads, we abort them later */
3007 /* Do not lock here since it is not needed and the caller holds threads_lock */
3008 if (thread->state & ThreadState_Background) {
3009 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3010 return; /* just leave, ignore */
3013 if (mono_gc_is_finalizer_internal_thread (thread)) {
3014 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3018 if (thread == mono_thread_internal_current ()) {
3019 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3023 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3024 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3028 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3029 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3033 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3034 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3035 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3036 wait->threads[wait->num]=thread;
3039 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3041 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3046 /* Just ignore the rest, we can't do anything with
3053 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3055 struct wait_data *wait=(struct wait_data *)user;
3056 MonoNativeThreadId self = mono_native_thread_id_get ();
3057 MonoInternalThread *thread = (MonoInternalThread *)value;
3059 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3062 /* The finalizer thread is not a background thread */
3063 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3064 && (thread->state & ThreadState_Background) != 0
3065 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3067 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3068 wait->threads[wait->num] = thread;
3071 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3072 mono_thread_internal_abort (thread);
3076 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3077 && !mono_gc_is_finalizer_internal_thread (thread);
3081 * mono_threads_set_shutting_down:
3083 * Is called by a thread that wants to shut down Mono. If the runtime is already
3084 * shutting down, the calling thread is suspended/stopped, and this function never
3088 mono_threads_set_shutting_down (void)
3090 MonoInternalThread *current_thread = mono_thread_internal_current ();
3092 mono_threads_lock ();
3094 if (shutting_down) {
3095 mono_threads_unlock ();
3097 /* Make sure we're properly suspended/stopped */
3099 LOCK_THREAD (current_thread);
3101 if ((current_thread->state & ThreadState_SuspendRequested) ||
3102 (current_thread->state & ThreadState_AbortRequested) ||
3103 (current_thread->state & ThreadState_StopRequested)) {
3104 UNLOCK_THREAD (current_thread);
3105 mono_thread_execute_interruption ();
3107 current_thread->state |= ThreadState_Stopped;
3108 UNLOCK_THREAD (current_thread);
3111 /*since we're killing the thread, detach it.*/
3112 mono_thread_detach_internal (current_thread);
3114 /* Wake up other threads potentially waiting for us */
3115 mono_thread_info_exit (0);
3117 shutting_down = TRUE;
3119 /* Not really a background state change, but this will
3120 * interrupt the main thread if it is waiting for all
3121 * the other threads.
3123 mono_os_event_set (&background_change_event);
3125 mono_threads_unlock ();
3129 void mono_thread_manage (void)
3131 struct wait_data wait_data;
3132 struct wait_data *wait = &wait_data;
3134 memset (wait, 0, sizeof (struct wait_data));
3135 /* join each thread that's still running */
3136 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3138 mono_threads_lock ();
3140 THREAD_DEBUG (g_message("%s: No threads", __func__));
3141 mono_threads_unlock ();
3144 mono_threads_unlock ();
3147 mono_threads_lock ();
3148 if (shutting_down) {
3149 /* somebody else is shutting down */
3150 mono_threads_unlock ();
3153 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3154 mono_g_hash_table_foreach (threads, print_tids, NULL));
3156 mono_os_event_reset (&background_change_event);
3158 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3159 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3160 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3161 mono_threads_unlock ();
3163 /* Something to wait for */
3164 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3165 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3166 } while(wait->num>0);
3168 /* Mono is shutting down, so just wait for the end */
3169 if (!mono_runtime_try_shutdown ()) {
3170 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3171 mono_thread_suspend (mono_thread_internal_current ());
3172 mono_thread_execute_interruption ();
3176 * Remove everything but the finalizer thread and self.
3177 * Also abort all the background threads
3180 mono_threads_lock ();
3183 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3184 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3185 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3187 mono_threads_unlock ();
3189 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3190 if (wait->num > 0) {
3191 /* Something to wait for */
3192 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3194 } while (wait->num > 0);
3197 * give the subthreads a chance to really quit (this is mainly needed
3198 * to get correct user and system times from getrusage/wait/time(1)).
3199 * This could be removed if we avoid pthread_detach() and use pthread_join().
3201 mono_thread_info_yield ();
3205 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3207 MonoInternalThread *thread = (MonoInternalThread*)value;
3208 struct wait_data *wait = (struct wait_data*)user_data;
3211 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3213 * This needs no locking.
3215 if ((thread->state & ThreadState_Suspended) != 0 ||
3216 (thread->state & ThreadState_Stopped) != 0)
3219 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3220 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3221 wait->threads [wait->num] = thread;
3227 * mono_thread_suspend_all_other_threads:
3229 * Suspend all managed threads except the finalizer thread and this thread. It is
3230 * not possible to resume them later.
3232 void mono_thread_suspend_all_other_threads (void)
3234 struct wait_data wait_data;
3235 struct wait_data *wait = &wait_data;
3237 MonoNativeThreadId self = mono_native_thread_id_get ();
3238 guint32 eventidx = 0;
3239 gboolean starting, finished;
3241 memset (wait, 0, sizeof (struct wait_data));
3243 * The other threads could be in an arbitrary state at this point, i.e.
3244 * they could be starting up, shutting down etc. This means that there could be
3245 * threads which are not even in the threads hash table yet.
3249 * First we set a barrier which will be checked by all threads before they
3250 * are added to the threads hash table, and they will exit if the flag is set.
3251 * This ensures that no threads could be added to the hash later.
3252 * We will use shutting_down as the barrier for now.
3254 g_assert (shutting_down);
3257 * We make multiple calls to WaitForMultipleObjects since:
3258 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3259 * - some threads could exit without becoming suspended
3264 * Make a copy of the hashtable since we can't do anything with
3265 * threads while threads_mutex is held.
3268 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3269 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3270 mono_threads_lock ();
3271 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3272 mono_threads_unlock ();
3275 /* Get the suspended events that we'll be waiting for */
3276 for (i = 0; i < wait->num; ++i) {
3277 MonoInternalThread *thread = wait->threads [i];
3279 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3280 || mono_gc_is_finalizer_internal_thread (thread)
3281 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3283 mono_threads_close_thread_handle (wait->handles [i]);
3284 wait->threads [i] = NULL;
3288 LOCK_THREAD (thread);
3290 if ((thread->state & ThreadState_Suspended) != 0 ||
3291 (thread->state & ThreadState_StopRequested) != 0 ||
3292 (thread->state & ThreadState_Stopped) != 0) {
3293 UNLOCK_THREAD (thread);
3294 mono_threads_close_thread_handle (wait->handles [i]);
3295 wait->threads [i] = NULL;
3301 /* Convert abort requests into suspend requests */
3302 if ((thread->state & ThreadState_AbortRequested) != 0)
3303 thread->state &= ~ThreadState_AbortRequested;
3305 thread->state |= ThreadState_SuspendRequested;
3306 mono_os_event_reset (thread->suspended);
3308 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3309 async_suspend_internal (thread, TRUE);
3311 mono_threads_close_thread_handle (wait->handles [i]);
3312 wait->threads [i] = NULL;
3314 if (eventidx <= 0) {
3316 * If there are threads which are starting up, we wait until they
3317 * are suspended when they try to register in the threads hash.
3318 * This is guaranteed to finish, since the threads which can create new
3319 * threads get suspended after a while.
3320 * FIXME: The finalizer thread can still create new threads.
3322 mono_threads_lock ();
3323 if (threads_starting_up)
3324 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3327 mono_threads_unlock ();
3329 mono_thread_info_sleep (100, NULL);
3337 MonoInternalThread *thread;
3338 MonoStackFrameInfo *frames;
3339 int nframes, max_frames;
3340 int nthreads, max_threads;
3341 MonoInternalThread **threads;
3342 } ThreadDumpUserData;
3344 static gboolean thread_dump_requested;
3346 /* This needs to be async safe */
3348 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3350 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3352 if (ud->nframes < ud->max_frames) {
3353 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3360 /* This needs to be async safe */
3361 static SuspendThreadResult
3362 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3364 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3365 MonoInternalThread *thread = user_data->thread;
3368 /* This no longer works with remote unwinding */
3369 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3370 mono_thread_internal_describe (thread, text);
3371 g_string_append (text, "\n");
3374 if (thread == mono_thread_internal_current ())
3375 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3377 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3379 return MonoResumeThread;
3383 int nthreads, max_threads;
3384 MonoInternalThread **threads;
3385 } CollectThreadsUserData;
3388 collect_thread (gpointer key, gpointer value, gpointer user)
3390 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3391 MonoInternalThread *thread = (MonoInternalThread *)value;
3393 if (ud->nthreads < ud->max_threads)
3394 ud->threads [ud->nthreads ++] = thread;
3398 * Collect running threads into the THREADS array.
3399 * THREADS should be an array allocated on the stack.
3402 collect_threads (MonoInternalThread **thread_array, int max_threads)
3404 CollectThreadsUserData ud;
3406 memset (&ud, 0, sizeof (ud));
3407 /* This array contains refs, but its on the stack, so its ok */
3408 ud.threads = thread_array;
3409 ud.max_threads = max_threads;
3411 mono_threads_lock ();
3412 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3413 mono_threads_unlock ();
3419 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3421 GString* text = g_string_new (0);
3423 GError *error = NULL;
3426 ud->thread = thread;
3429 /* Collect frames for the thread */
3430 if (thread == mono_thread_internal_current ()) {
3431 get_thread_dump (mono_thread_info_current (), ud);
3433 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3437 * Do all the non async-safe work outside of get_thread_dump.
3440 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3442 g_string_append_printf (text, "\n\"%s\"", name);
3445 else if (thread->threadpool_thread) {
3446 g_string_append (text, "\n\"<threadpool thread>\"");
3448 g_string_append (text, "\n\"<unnamed thread>\"");
3451 for (i = 0; i < ud->nframes; ++i) {
3452 MonoStackFrameInfo *frame = &ud->frames [i];
3453 MonoMethod *method = NULL;
3455 if (frame->type == FRAME_TYPE_MANAGED)
3456 method = mono_jit_info_get_method (frame->ji);
3459 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3460 g_string_append_printf (text, " %s\n", location);
3463 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3467 fprintf (stdout, "%s", text->str);
3469 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3470 OutputDebugStringA(text->str);
3473 g_string_free (text, TRUE);
3478 mono_threads_perform_thread_dump (void)
3480 ThreadDumpUserData ud;
3481 MonoInternalThread *thread_array [128];
3482 int tindex, nthreads;
3484 if (!thread_dump_requested)
3487 printf ("Full thread dump:\n");
3489 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3490 nthreads = collect_threads (thread_array, 128);
3492 memset (&ud, 0, sizeof (ud));
3493 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3494 ud.max_frames = 256;
3496 for (tindex = 0; tindex < nthreads; ++tindex)
3497 dump_thread (thread_array [tindex], &ud);
3501 thread_dump_requested = FALSE;
3504 /* Obtain the thread dump of all threads */
3506 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3509 ThreadDumpUserData ud;
3510 MonoInternalThread *thread_array [128];
3511 MonoDomain *domain = mono_domain_get ();
3512 MonoDebugSourceLocation *location;
3513 int tindex, nthreads;
3515 mono_error_init (error);
3517 *out_threads = NULL;
3518 *out_stack_frames = NULL;
3520 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3521 nthreads = collect_threads (thread_array, 128);
3523 memset (&ud, 0, sizeof (ud));
3524 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3525 ud.max_frames = 256;
3527 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3530 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3534 for (tindex = 0; tindex < nthreads; ++tindex) {
3535 MonoInternalThread *thread = thread_array [tindex];
3536 MonoArray *thread_frames;
3542 /* Collect frames for the thread */
3543 if (thread == mono_thread_internal_current ()) {
3544 get_thread_dump (mono_thread_info_current (), &ud);
3546 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3549 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3551 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3554 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3556 for (i = 0; i < ud.nframes; ++i) {
3557 MonoStackFrameInfo *frame = &ud.frames [i];
3558 MonoMethod *method = NULL;
3559 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3563 sf->native_offset = frame->native_offset;
3565 if (frame->type == FRAME_TYPE_MANAGED)
3566 method = mono_jit_info_get_method (frame->ji);
3569 sf->method_address = (gsize) frame->ji->code_start;
3571 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3574 MONO_OBJECT_SETREF (sf, method, rm);
3576 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3578 sf->il_offset = location->il_offset;
3580 if (location && location->source_file) {
3581 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3582 sf->line = location->row;
3583 sf->column = location->column;
3585 mono_debug_free_source_location (location);
3590 mono_array_setref (thread_frames, i, sf);
3596 return is_ok (error);
3600 * mono_threads_request_thread_dump:
3602 * Ask all threads except the current to print their stacktrace to stdout.
3605 mono_threads_request_thread_dump (void)
3607 /*The new thread dump code runs out of the finalizer thread. */
3608 thread_dump_requested = TRUE;
3609 mono_gc_finalize_notify ();
3614 gint allocated; /* +1 so that refs [allocated] == NULL */
3618 typedef struct ref_stack RefStack;
3621 ref_stack_new (gint initial_size)
3625 initial_size = MAX (initial_size, 16) + 1;
3626 rs = g_new0 (RefStack, 1);
3627 rs->refs = g_new0 (gpointer, initial_size);
3628 rs->allocated = initial_size;
3633 ref_stack_destroy (gpointer ptr)
3635 RefStack *rs = (RefStack *)ptr;
3644 ref_stack_push (RefStack *rs, gpointer ptr)
3646 g_assert (rs != NULL);
3648 if (rs->bottom >= rs->allocated) {
3649 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3650 rs->allocated <<= 1;
3651 rs->refs [rs->allocated] = NULL;
3653 rs->refs [rs->bottom++] = ptr;
3657 ref_stack_pop (RefStack *rs)
3659 if (rs == NULL || rs->bottom == 0)
3663 rs->refs [rs->bottom] = NULL;
3667 ref_stack_find (RefStack *rs, gpointer ptr)
3674 for (refs = rs->refs; refs && *refs; refs++) {
3682 * mono_thread_push_appdomain_ref:
3684 * Register that the current thread may have references to objects in domain
3685 * @domain on its stack. Each call to this function should be paired with a
3686 * call to pop_appdomain_ref.
3689 mono_thread_push_appdomain_ref (MonoDomain *domain)
3691 MonoInternalThread *thread = mono_thread_internal_current ();
3694 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3695 SPIN_LOCK (thread->lock_thread_id);
3696 if (thread->appdomain_refs == NULL)
3697 thread->appdomain_refs = ref_stack_new (16);
3698 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3699 SPIN_UNLOCK (thread->lock_thread_id);
3704 mono_thread_pop_appdomain_ref (void)
3706 MonoInternalThread *thread = mono_thread_internal_current ();
3709 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3710 SPIN_LOCK (thread->lock_thread_id);
3711 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3712 SPIN_UNLOCK (thread->lock_thread_id);
3717 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3720 SPIN_LOCK (thread->lock_thread_id);
3721 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3722 SPIN_UNLOCK (thread->lock_thread_id);
3727 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3729 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3732 typedef struct abort_appdomain_data {
3733 struct wait_data wait;
3735 } abort_appdomain_data;
3738 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3740 MonoInternalThread *thread = (MonoInternalThread*)value;
3741 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3742 MonoDomain *domain = data->domain;
3744 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3745 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3747 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3748 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3749 data->wait.threads [data->wait.num] = thread;
3752 /* Just ignore the rest, we can't do anything with
3760 * mono_threads_abort_appdomain_threads:
3762 * Abort threads which has references to the given appdomain.
3765 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3767 #ifdef __native_client__
3771 abort_appdomain_data user_data;
3773 int orig_timeout = timeout;
3776 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3778 start_time = mono_msec_ticks ();
3780 mono_threads_lock ();
3782 user_data.domain = domain;
3783 user_data.wait.num = 0;
3784 /* This shouldn't take any locks */
3785 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3786 mono_threads_unlock ();
3788 if (user_data.wait.num > 0) {
3789 /* Abort the threads outside the threads lock */
3790 for (i = 0; i < user_data.wait.num; ++i)
3791 mono_thread_internal_abort (user_data.wait.threads [i]);
3794 * We should wait for the threads either to abort, or to leave the
3795 * domain. We can't do the latter, so we wait with a timeout.
3797 wait_for_tids (&user_data.wait, 100, FALSE);
3800 /* Update remaining time */
3801 timeout -= mono_msec_ticks () - start_time;
3802 start_time = mono_msec_ticks ();
3804 if (orig_timeout != -1 && timeout < 0)
3807 while (user_data.wait.num > 0);
3809 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3815 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3817 MonoInternalThread *thread = (MonoInternalThread*)value;
3818 MonoDomain *domain = (MonoDomain*)user_data;
3821 /* No locking needed here */
3822 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3824 if (thread->cached_culture_info) {
3825 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3826 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3827 if (obj && obj->vtable->domain == domain)
3828 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3834 * mono_threads_clear_cached_culture:
3836 * Clear the cached_current_culture from all threads if it is in the
3840 mono_threads_clear_cached_culture (MonoDomain *domain)
3842 mono_threads_lock ();
3843 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3844 mono_threads_unlock ();
3848 * mono_thread_get_undeniable_exception:
3850 * Return an exception which needs to be raised when leaving a catch clause.
3851 * This is used for undeniable exception propagation.
3854 mono_thread_get_undeniable_exception (void)
3856 MonoInternalThread *thread = mono_thread_internal_current ();
3858 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3861 // We don't want to have our exception effect calls made by
3862 // the catching block
3864 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3868 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3869 * exception if the thread no longer references a dying appdomain.
3871 thread->abort_exc->trace_ips = NULL;
3872 thread->abort_exc->stack_trace = NULL;
3873 return thread->abort_exc;
3876 #if MONO_SMALL_CONFIG
3877 #define NUM_STATIC_DATA_IDX 4
3878 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3882 #define NUM_STATIC_DATA_IDX 8
3883 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3884 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3888 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3889 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3892 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3894 gpointer *static_data = (gpointer *)addr;
3896 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3897 void **ptr = (void **)static_data [i];
3902 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3903 void **p = ptr + idx;
3906 mark_func ((MonoObject**)p, gc_data);
3912 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3914 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3918 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3920 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3924 * mono_alloc_static_data
3926 * Allocate memory blocks for storing threads or context static data
3929 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3931 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3934 gpointer* static_data = *static_data_ptr;
3936 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3937 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3939 if (mono_gc_user_markers_supported ()) {
3940 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3941 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3943 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3944 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3947 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3948 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3949 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3950 *static_data_ptr = static_data;
3951 static_data [0] = static_data;
3954 for (i = 1; i <= idx; ++i) {
3955 if (static_data [i])
3958 if (mono_gc_user_markers_supported ())
3959 static_data [i] = g_malloc0 (static_data_size [i]);
3961 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3962 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3963 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3968 mono_free_static_data (gpointer* static_data)
3971 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3972 gpointer p = static_data [i];
3976 * At this point, the static data pointer array is still registered with the
3977 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3978 * data. Freeing the individual arrays without first nulling their slots
3979 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3980 * such an already freed array. See bug #13813.
3982 static_data [i] = NULL;
3983 mono_memory_write_barrier ();
3984 if (mono_gc_user_markers_supported ())
3987 mono_gc_free_fixed (p);
3989 mono_gc_free_fixed (static_data);
3993 * mono_init_static_data_info
3995 * Initializes static data counters
3997 static void mono_init_static_data_info (StaticDataInfo *static_data)
3999 static_data->idx = 0;
4000 static_data->offset = 0;
4001 static_data->freelist = NULL;
4005 * mono_alloc_static_data_slot
4007 * Generates an offset for static data. static_data contains the counters
4008 * used to generate it.
4011 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4013 if (!static_data->idx && !static_data->offset) {
4015 * we use the first chunk of the first allocation also as
4016 * an array for the rest of the data
4018 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4020 static_data->offset += align - 1;
4021 static_data->offset &= ~(align - 1);
4022 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4023 static_data->idx ++;
4024 g_assert (size <= static_data_size [static_data->idx]);
4025 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4026 static_data->offset = 0;
4028 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4029 static_data->offset += size;
4034 * LOCKING: requires that threads_mutex is held
4037 context_adjust_static_data (MonoAppContext *ctx)
4039 if (context_static_info.offset || context_static_info.idx > 0) {
4040 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4041 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4042 ctx->data->static_data = ctx->static_data;
4047 * LOCKING: requires that threads_mutex is held
4050 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4052 MonoInternalThread *thread = (MonoInternalThread *)value;
4053 guint32 offset = GPOINTER_TO_UINT (user);
4055 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4059 * LOCKING: requires that threads_mutex is held
4062 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4064 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4069 guint32 offset = GPOINTER_TO_UINT (user);
4070 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4071 ctx->data->static_data = ctx->static_data;
4074 static StaticDataFreeList*
4075 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4077 StaticDataFreeList* prev = NULL;
4078 StaticDataFreeList* tmp = static_data->freelist;
4080 if (tmp->size == size) {
4082 prev->next = tmp->next;
4084 static_data->freelist = tmp->next;
4093 #if SIZEOF_VOID_P == 4
4100 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4102 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4104 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4105 MonoBitSet *rb = sets [idx];
4106 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4107 offset /= sizeof (uintptr_t);
4108 /* offset is now the bitmap offset */
4109 for (int i = 0; i < numbits; ++i) {
4110 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4111 mono_bitset_set_fast (rb, offset + i);
4116 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4118 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4119 MonoBitSet *rb = sets [idx];
4120 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4121 offset /= sizeof (uintptr_t);
4122 /* offset is now the bitmap offset */
4123 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4124 mono_bitset_clear_fast (rb, offset + i);
4128 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4130 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4132 StaticDataInfo *info;
4135 if (static_type == SPECIAL_STATIC_THREAD) {
4136 info = &thread_static_info;
4137 sets = thread_reference_bitmaps;
4139 info = &context_static_info;
4140 sets = context_reference_bitmaps;
4143 mono_threads_lock ();
4145 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4149 offset = item->offset;
4152 offset = mono_alloc_static_data_slot (info, size, align);
4155 update_reference_bitmap (sets, offset, bitmap, numbits);
4157 if (static_type == SPECIAL_STATIC_THREAD) {
4158 /* This can be called during startup */
4159 if (threads != NULL)
4160 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4162 if (contexts != NULL)
4163 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4165 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4168 mono_threads_unlock ();
4174 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4176 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4178 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4179 return get_thread_static_data (thread, offset);
4181 return get_context_static_data (thread->current_appcontext, offset);
4186 mono_get_special_static_data (guint32 offset)
4188 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4197 * LOCKING: requires that threads_mutex is held
4200 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4202 MonoInternalThread *thread = (MonoInternalThread *)value;
4203 OffsetSize *data = (OffsetSize *)user;
4204 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4205 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4208 if (!thread->static_data || !thread->static_data [idx])
4210 ptr = ((char*) thread->static_data [idx]) + off;
4211 mono_gc_bzero_atomic (ptr, data->size);
4215 * LOCKING: requires that threads_mutex is held
4218 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4220 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4225 OffsetSize *data = (OffsetSize *)user;
4226 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4227 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4230 if (!ctx->static_data || !ctx->static_data [idx])
4233 ptr = ((char*) ctx->static_data [idx]) + off;
4234 mono_gc_bzero_atomic (ptr, data->size);
4238 do_free_special_slot (guint32 offset, guint32 size)
4240 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4242 StaticDataInfo *info;
4244 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4245 info = &thread_static_info;
4246 sets = thread_reference_bitmaps;
4248 info = &context_static_info;
4249 sets = context_reference_bitmaps;
4252 guint32 data_offset = offset;
4253 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4254 OffsetSize data = { data_offset, size };
4256 clear_reference_bitmap (sets, data.offset, data.size);
4258 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4259 if (threads != NULL)
4260 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4262 if (contexts != NULL)
4263 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4266 if (!mono_runtime_is_shutting_down ()) {
4267 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4269 item->offset = offset;
4272 item->next = info->freelist;
4273 info->freelist = item;
4278 do_free_special (gpointer key, gpointer value, gpointer data)
4280 MonoClassField *field = (MonoClassField *)key;
4281 guint32 offset = GPOINTER_TO_UINT (value);
4284 size = mono_type_size (field->type, &align);
4285 do_free_special_slot (offset, size);
4289 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4291 mono_threads_lock ();
4293 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4295 mono_threads_unlock ();
4299 static void CALLBACK dummy_apc (ULONG_PTR param)
4305 * mono_thread_execute_interruption
4307 * Performs the operation that the requested thread state requires (abort,
4310 static MonoException*
4311 mono_thread_execute_interruption (void)
4313 MonoInternalThread *thread = mono_thread_internal_current ();
4314 MonoThread *sys_thread = mono_thread_current ();
4316 LOCK_THREAD (thread);
4318 /* MonoThread::interruption_requested can only be changed with atomics */
4319 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4320 /* this will consume pending APC calls */
4322 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4324 InterlockedDecrement (&thread_interruption_requested);
4326 /* Clear the interrupted flag of the thread so it can wait again */
4327 mono_thread_info_clear_self_interrupt ();
4330 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4331 if (sys_thread->pending_exception) {
4334 exc = sys_thread->pending_exception;
4335 sys_thread->pending_exception = NULL;
4337 UNLOCK_THREAD (thread);
4339 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4340 UNLOCK_THREAD (thread);
4341 g_assert (sys_thread->pending_exception == NULL);
4342 if (thread->abort_exc == NULL) {
4344 * This might be racy, but it has to be called outside the lock
4345 * since it calls managed code.
4347 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4349 return thread->abort_exc;
4351 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4352 /* calls UNLOCK_THREAD (thread) */
4353 self_suspend_internal ();
4356 else if ((thread->state & ThreadState_StopRequested) != 0) {
4357 /* FIXME: do this through the JIT? */
4359 UNLOCK_THREAD (thread);
4361 mono_thread_exit ();
4363 } else if (thread->thread_interrupt_requested) {
4365 thread->thread_interrupt_requested = FALSE;
4366 UNLOCK_THREAD (thread);
4368 return(mono_get_exception_thread_interrupted ());
4371 UNLOCK_THREAD (thread);
4377 * mono_thread_request_interruption
4379 * A signal handler can call this method to request the interruption of a
4380 * thread. The result of the interruption will depend on the current state of
4381 * the thread. If the result is an exception that needs to be throw, it is
4382 * provided as return value.
4385 mono_thread_request_interruption (gboolean running_managed)
4387 MonoInternalThread *thread = mono_thread_internal_current ();
4389 /* The thread may already be stopping */
4394 if (thread->interrupt_on_stop &&
4395 thread->state & ThreadState_StopRequested &&
4396 thread->state & ThreadState_Background)
4399 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4401 InterlockedIncrement (&thread_interruption_requested);
4403 if (!running_managed || is_running_protected_wrapper ()) {
4404 /* Can't stop while in unmanaged code. Increase the global interruption
4405 request count. When exiting the unmanaged method the count will be
4406 checked and the thread will be interrupted. */
4408 /* this will awake the thread if it is in WaitForSingleObject
4410 /* Our implementation of this function ignores the func argument */
4412 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4414 mono_thread_info_self_interrupt ();
4419 return mono_thread_execute_interruption ();
4423 /*This function should be called by a thread after it has exited all of
4424 * its handle blocks at interruption time.*/
4426 mono_thread_resume_interruption (void)
4428 MonoInternalThread *thread = mono_thread_internal_current ();
4429 gboolean still_aborting;
4431 /* The thread may already be stopping */
4435 LOCK_THREAD (thread);
4436 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4437 UNLOCK_THREAD (thread);
4439 /*This can happen if the protected block called Thread::ResetAbort*/
4440 if (!still_aborting)
4443 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4445 InterlockedIncrement (&thread_interruption_requested);
4447 mono_thread_info_self_interrupt ();
4449 return mono_thread_execute_interruption ();
4452 gboolean mono_thread_interruption_requested ()
4454 if (thread_interruption_requested) {
4455 MonoInternalThread *thread = mono_thread_internal_current ();
4456 /* The thread may already be stopping */
4458 return (thread->interruption_requested);
4463 static MonoException*
4464 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4466 MonoInternalThread *thread = mono_thread_internal_current ();
4468 /* The thread may already be stopping */
4471 if (!thread->interruption_requested)
4473 if (!bypass_abort_protection && is_running_protected_wrapper ())
4476 return mono_thread_execute_interruption ();
4480 * Performs the interruption of the current thread, if one has been requested,
4481 * and the thread is not running a protected wrapper.
4482 * Return the exception which needs to be thrown, if any.
4485 mono_thread_interruption_checkpoint (void)
4487 return mono_thread_interruption_checkpoint_request (FALSE);
4491 * Performs the interruption of the current thread, if one has been requested.
4492 * Return the exception which needs to be thrown, if any.
4495 mono_thread_force_interruption_checkpoint_noraise (void)
4497 return mono_thread_interruption_checkpoint_request (TRUE);
4501 * mono_set_pending_exception:
4503 * Set the pending exception of the current thread to EXC.
4504 * The exception will be thrown when execution returns to managed code.
4507 mono_set_pending_exception (MonoException *exc)
4509 MonoThread *thread = mono_thread_current ();
4511 /* The thread may already be stopping */
4515 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4517 mono_thread_request_interruption (FALSE);
4521 * mono_thread_interruption_request_flag:
4523 * Returns the address of a flag that will be non-zero if an interruption has
4524 * been requested for a thread. The thread to interrupt may not be the current
4525 * thread, so an additional call to mono_thread_interruption_requested() or
4526 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4529 gint32* mono_thread_interruption_request_flag ()
4531 return &thread_interruption_requested;
4535 mono_thread_init_apartment_state (void)
4538 MonoInternalThread* thread = mono_thread_internal_current ();
4540 /* Positive return value indicates success, either
4541 * S_OK if this is first CoInitialize call, or
4542 * S_FALSE if CoInitialize already called, but with same
4543 * threading model. A negative value indicates failure,
4544 * probably due to trying to change the threading model.
4546 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4547 ? COINIT_APARTMENTTHREADED
4548 : COINIT_MULTITHREADED) < 0) {
4549 thread->apartment_state = ThreadApartmentState_Unknown;
4555 mono_thread_cleanup_apartment_state (void)
4558 MonoInternalThread* thread = mono_thread_internal_current ();
4560 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4567 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4569 LOCK_THREAD (thread);
4570 thread->state |= state;
4571 UNLOCK_THREAD (thread);
4575 * mono_thread_test_and_set_state:
4577 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4579 * Returns TRUE is @set was OR'd in.
4582 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4584 LOCK_THREAD (thread);
4586 if ((thread->state & test) != 0) {
4587 UNLOCK_THREAD (thread);
4591 thread->state |= set;
4592 UNLOCK_THREAD (thread);
4598 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4600 LOCK_THREAD (thread);
4601 thread->state &= ~state;
4602 UNLOCK_THREAD (thread);
4606 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4608 gboolean ret = FALSE;
4610 LOCK_THREAD (thread);
4612 if ((thread->state & test) != 0) {
4616 UNLOCK_THREAD (thread);
4621 static gboolean has_tls_get = FALSE;
4624 mono_runtime_set_has_tls_get (gboolean val)
4630 mono_runtime_has_tls_get (void)
4636 self_interrupt_thread (void *_unused)
4639 MonoThreadInfo *info;
4641 exc = mono_thread_execute_interruption ();
4643 if (mono_threads_is_coop_enabled ()) {
4644 /* We can return from an async call in coop, as
4645 * it's simply called when exiting the safepoint */
4649 g_error ("%s: we can't resume from an async call", __func__);
4652 info = mono_thread_info_current ();
4654 /* We must use _with_context since we didn't trampoline into the runtime */
4655 mono_raise_exception_with_context (exc, &info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX].ctx); /* FIXME using thread_saved_state [ASYNC_SUSPEND_STATE_INDEX] can race with another suspend coming in. */
4659 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4663 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4667 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4669 MonoJitInfo **dest = (MonoJitInfo **)data;
4675 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4677 MonoJitInfo *ji = NULL;
4682 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4683 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4684 * where we hold runtime locks.
4686 if (!mono_threads_is_coop_enabled ())
4687 mono_thread_info_set_is_async_context (TRUE);
4688 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4689 if (!mono_threads_is_coop_enabled ())
4690 mono_thread_info_set_is_async_context (FALSE);
4695 MonoInternalThread *thread;
4696 gboolean install_async_abort;
4697 MonoThreadInfoInterruptToken *interrupt_token;
4700 static SuspendThreadResult
4701 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4703 AbortThreadData *data = (AbortThreadData *)ud;
4704 MonoInternalThread *thread = data->thread;
4705 MonoJitInfo *ji = NULL;
4706 gboolean protected_wrapper;
4707 gboolean running_managed;
4709 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4710 return MonoResumeThread;
4713 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4714 The protected block code will give them a chance when appropriate.
4716 if (thread->abort_protected_block_count)
4717 return MonoResumeThread;
4719 /*someone is already interrupting it*/
4720 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4721 return MonoResumeThread;
4723 InterlockedIncrement (&thread_interruption_requested);
4725 ji = mono_thread_info_get_last_managed (info);
4726 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4727 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4729 if (!protected_wrapper && running_managed) {
4730 /*We are in managed code*/
4731 /*Set the thread to call */
4732 if (data->install_async_abort)
4733 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4734 return MonoResumeThread;
4737 * This will cause waits to be broken.
4738 * It will also prevent the thread from entering a wait, so if the thread returns
4739 * from the wait before it receives the abort signal, it will just spin in the wait
4740 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4743 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4745 return MonoResumeThread;
4750 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4752 AbortThreadData data;
4754 g_assert (thread != mono_thread_internal_current ());
4756 data.thread = thread;
4757 data.install_async_abort = install_async_abort;
4758 data.interrupt_token = NULL;
4760 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4761 if (data.interrupt_token)
4762 mono_thread_info_finish_interrupt (data.interrupt_token);
4763 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4767 self_abort_internal (MonoError *error)
4771 mono_error_init (error);
4773 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4774 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4777 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.
4779 exc = mono_thread_request_interruption (TRUE);
4781 mono_error_set_exception_instance (error, exc);
4783 mono_thread_info_self_interrupt ();
4787 MonoInternalThread *thread;
4789 MonoThreadInfoInterruptToken *interrupt_token;
4790 } SuspendThreadData;
4792 static SuspendThreadResult
4793 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4795 SuspendThreadData *data = (SuspendThreadData *)ud;
4796 MonoInternalThread *thread = data->thread;
4797 MonoJitInfo *ji = NULL;
4798 gboolean protected_wrapper;
4799 gboolean running_managed;
4801 ji = mono_thread_info_get_last_managed (info);
4802 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4803 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4805 if (running_managed && !protected_wrapper) {
4806 if (mono_threads_is_coop_enabled ()) {
4807 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4808 return MonoResumeThread;
4810 thread->state &= ~ThreadState_SuspendRequested;
4811 thread->state |= ThreadState_Suspended;
4812 return KeepSuspended;
4815 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4816 InterlockedIncrement (&thread_interruption_requested);
4817 if (data->interrupt)
4818 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4820 return MonoResumeThread;
4824 /* LOCKING: called with @thread synch_cs held, and releases it */
4826 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4828 SuspendThreadData data;
4830 g_assert (thread != mono_thread_internal_current ());
4832 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4834 thread->self_suspended = FALSE;
4836 data.thread = thread;
4837 data.interrupt = interrupt;
4838 data.interrupt_token = NULL;
4840 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4841 if (data.interrupt_token)
4842 mono_thread_info_finish_interrupt (data.interrupt_token);
4844 UNLOCK_THREAD (thread);
4847 /* LOCKING: called with @thread synch_cs held, and releases it */
4849 self_suspend_internal (void)
4851 MonoInternalThread *thread;
4853 MonoOSEventWaitRet res;
4855 thread = mono_thread_internal_current ();
4857 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4859 thread->self_suspended = TRUE;
4861 thread->state &= ~ThreadState_SuspendRequested;
4862 thread->state |= ThreadState_Suspended;
4864 UNLOCK_THREAD (thread);
4866 event = thread->suspended;
4869 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT);
4870 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4875 * mono_thread_is_foreign:
4876 * @thread: the thread to query
4878 * This function allows one to determine if a thread was created by the mono runtime and has
4879 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4881 * Returns: TRUE if @thread was not created by the runtime.
4884 mono_thread_is_foreign (MonoThread *thread)
4886 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4887 return info->runtime_thread == FALSE;
4891 * mono_add_joinable_thread:
4893 * Add TID to the list of joinable threads.
4894 * LOCKING: Acquires the threads lock.
4897 mono_threads_add_joinable_thread (gpointer tid)
4901 * We cannot detach from threads because it causes problems like
4902 * 2fd16f60/r114307. So we collect them and join them when
4903 * we have time (in he finalizer thread).
4905 joinable_threads_lock ();
4906 if (!joinable_threads)
4907 joinable_threads = g_hash_table_new (NULL, NULL);
4908 g_hash_table_insert (joinable_threads, tid, tid);
4909 joinable_thread_count ++;
4910 joinable_threads_unlock ();
4912 mono_gc_finalize_notify ();
4917 * mono_threads_join_threads:
4919 * Join all joinable threads. This is called from the finalizer thread.
4920 * LOCKING: Acquires the threads lock.
4923 mono_threads_join_threads (void)
4926 GHashTableIter iter;
4933 if (!joinable_thread_count)
4937 joinable_threads_lock ();
4939 if (g_hash_table_size (joinable_threads)) {
4940 g_hash_table_iter_init (&iter, joinable_threads);
4941 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4942 thread = (pthread_t)tid;
4943 g_hash_table_remove (joinable_threads, key);
4944 joinable_thread_count --;
4947 joinable_threads_unlock ();
4949 if (thread != pthread_self ()) {
4951 /* This shouldn't block */
4952 mono_native_thread_join (thread);
4965 * Wait for thread TID to exit.
4966 * LOCKING: Acquires the threads lock.
4969 mono_thread_join (gpointer tid)
4973 gboolean found = FALSE;
4975 joinable_threads_lock ();
4976 if (!joinable_threads)
4977 joinable_threads = g_hash_table_new (NULL, NULL);
4978 if (g_hash_table_lookup (joinable_threads, tid)) {
4979 g_hash_table_remove (joinable_threads, tid);
4980 joinable_thread_count --;
4983 joinable_threads_unlock ();
4986 thread = (pthread_t)tid;
4988 mono_native_thread_join (thread);
4994 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4996 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4997 mono_thread_interruption_checkpoint ();
5001 mono_thread_internal_unhandled_exception (MonoObject* exc)
5003 MonoClass *klass = exc->vtable->klass;
5004 if (is_threadabort_exception (klass)) {
5005 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5006 } else if (!is_appdomainunloaded_exception (klass)
5007 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5008 mono_unhandled_exception (exc);
5009 if (mono_environment_exitcode_get () == 1) {
5010 mono_environment_exitcode_set (255);
5011 mono_invoke_unhandled_exception_hook (exc);
5012 g_assert_not_reached ();
5018 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5021 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5022 mono_error_set_pending_exception (&error);
5026 * mono_threads_attach_coop: called by native->managed wrappers
5030 * - @return: the original domain which needs to be restored, or NULL.
5033 * - @dummy: contains the original domain
5034 * - @return: a cookie containing current MonoThreadInfo*.
5037 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5040 gboolean fresh_thread = FALSE;
5043 /* Happens when called from AOTed code which is only used in the root domain. */
5044 domain = mono_get_root_domain ();
5049 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5050 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5051 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5052 * we're only responsible for making the cookie. */
5053 if (mono_threads_is_coop_enabled ()) {
5054 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5055 fresh_thread = !info || !mono_thread_info_is_live (info);
5058 if (!mono_thread_internal_current ()) {
5059 mono_thread_attach_full (domain, FALSE);
5062 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5065 orig = mono_domain_get ();
5067 mono_domain_set (domain, TRUE);
5069 if (!mono_threads_is_coop_enabled ())
5070 return orig != domain ? orig : NULL;
5074 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5075 * return the right cookie. */
5076 return mono_threads_enter_gc_unsafe_region_cookie ();
5079 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5080 return mono_threads_enter_gc_unsafe_region (dummy);
5085 * mono_threads_detach_coop: called by native->managed wrappers
5088 * - @cookie: the original domain which needs to be restored, or NULL.
5092 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5093 * - @dummy: contains the original domain
5096 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5098 MonoDomain *domain, *orig;
5100 if (!mono_threads_is_coop_enabled ()) {
5101 orig = (MonoDomain*) cookie;
5103 mono_domain_set (orig, TRUE);
5105 orig = (MonoDomain*) *dummy;
5107 domain = mono_domain_get ();
5110 /* it won't do anything if cookie is NULL
5111 * thread state RUNNING -> (RUNNING|BLOCKING) */
5112 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5114 if (orig != domain) {
5116 mono_domain_unset ();
5118 mono_domain_set (orig, TRUE);
5124 mono_threads_begin_abort_protected_block (void)
5126 MonoInternalThread *thread;
5128 thread = mono_thread_internal_current ();
5129 ++thread->abort_protected_block_count;
5130 mono_memory_barrier ();
5134 mono_threads_end_abort_protected_block (void)
5136 MonoInternalThread *thread;
5138 thread = mono_thread_internal_current ();
5140 mono_memory_barrier ();
5141 --thread->abort_protected_block_count;
5145 mono_thread_try_resume_interruption (void)
5147 MonoInternalThread *thread;
5149 thread = mono_thread_internal_current ();
5150 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5153 return mono_thread_resume_interruption ();
5157 /* Returns TRUE if the current thread is ready to be interrupted. */
5159 mono_threads_is_ready_to_be_interrupted (void)
5161 MonoInternalThread *thread;
5163 thread = mono_thread_internal_current ();
5164 LOCK_THREAD (thread);
5165 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5166 UNLOCK_THREAD (thread);
5170 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5171 UNLOCK_THREAD (thread);
5175 UNLOCK_THREAD (thread);
5181 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5183 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5185 if (internal->thread_info) {
5186 g_string_append (text, ", state : ");
5187 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5190 if (internal->owned_mutexes) {
5193 g_string_append (text, ", owns : [");
5194 for (i = 0; i < internal->owned_mutexes->len; i++)
5195 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5196 g_string_append (text, "]");
5201 mono_thread_internal_is_current (MonoInternalThread *internal)
5203 g_assert (internal);
5204 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));