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));
1618 static MonoThreadInfoWaitRet
1619 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1622 MonoThreadInfoWaitRet ret;
1627 mono_error_init (error);
1629 start = (ms == -1) ? 0 : mono_msec_ticks ();
1632 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1635 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1638 exc = mono_thread_execute_interruption ();
1640 mono_error_set_exception_instance (error, exc);
1647 /* Re-calculate ms according to the time passed */
1648 diff_ms = (gint32)(mono_msec_ticks () - start);
1649 if (diff_ms >= ms) {
1650 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1653 wait = ms - diff_ms;
1660 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1662 MonoInternalThread *thread = this_obj->internal_thread;
1663 MonoThreadHandle *handle = thread->handle;
1664 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1668 if (mono_thread_current_check_pending_interrupt ())
1671 LOCK_THREAD (thread);
1673 if ((thread->state & ThreadState_Unstarted) != 0) {
1674 UNLOCK_THREAD (thread);
1676 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1680 UNLOCK_THREAD (thread);
1683 ms=MONO_INFINITE_WAIT;
1685 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1687 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1689 ret=mono_join_uninterrupted (handle, ms, &error);
1691 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1693 mono_error_set_pending_exception (&error);
1695 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1696 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1701 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1706 #define MANAGED_WAIT_FAILED 0x7fffffff
1709 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1711 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1712 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1713 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1714 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1715 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1716 return WAIT_IO_COMPLETION;
1717 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1718 return WAIT_TIMEOUT;
1719 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1720 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1721 return MANAGED_WAIT_FAILED;
1723 g_error ("%s: unknown val value %d", __func__, val);
1727 static MonoW32HandleWaitRet
1728 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1731 MonoW32HandleWaitRet ret;
1736 mono_error_init (error);
1738 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1742 if (numhandles != 1)
1743 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1745 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1747 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1748 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1749 #endif /* HOST_WIN32 */
1752 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1755 exc = mono_thread_execute_interruption ();
1757 mono_error_set_exception_instance (error, exc);
1764 /* Re-calculate ms according to the time passed */
1765 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1766 if (diff_ms >= ms) {
1767 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1770 wait = ms - diff_ms;
1776 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1781 MonoW32HandleWaitRet ret;
1783 MonoObject *waitHandle;
1784 MonoInternalThread *thread = mono_thread_internal_current ();
1786 /* Do this WaitSleepJoin check before creating objects */
1787 if (mono_thread_current_check_pending_interrupt ())
1788 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1790 /* We fail in managed if the array has more than 64 elements */
1791 numhandles = (guint32)mono_array_length(mono_handles);
1792 handles = g_new0(HANDLE, numhandles);
1794 for(i = 0; i < numhandles; i++) {
1795 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1796 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1800 ms=MONO_INFINITE_WAIT;
1803 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1805 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1807 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1811 mono_error_set_pending_exception (&error);
1813 return map_native_wait_result_to_managed (ret, numhandles);
1816 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1819 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1820 uintptr_t numhandles;
1821 MonoW32HandleWaitRet ret;
1823 MonoObject *waitHandle;
1824 MonoInternalThread *thread = mono_thread_internal_current ();
1826 /* Do this WaitSleepJoin check before creating objects */
1827 if (mono_thread_current_check_pending_interrupt ())
1828 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1830 numhandles = mono_array_length(mono_handles);
1831 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1832 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1834 for(i = 0; i < numhandles; i++) {
1835 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1836 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1840 ms=MONO_INFINITE_WAIT;
1843 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1845 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1847 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1849 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1851 mono_error_set_pending_exception (&error);
1853 return map_native_wait_result_to_managed (ret, numhandles);
1856 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1859 MonoW32HandleWaitRet ret;
1860 MonoInternalThread *thread = mono_thread_internal_current ();
1862 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1865 ms=MONO_INFINITE_WAIT;
1868 if (mono_thread_current_check_pending_interrupt ())
1869 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1871 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1873 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1875 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1877 mono_error_set_pending_exception (&error);
1878 return map_native_wait_result_to_managed (ret, 1);
1882 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1884 MonoW32HandleWaitRet ret;
1885 MonoInternalThread *thread = mono_thread_internal_current ();
1888 ms = MONO_INFINITE_WAIT;
1890 if (mono_thread_current_check_pending_interrupt ())
1891 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1893 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1897 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1899 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1903 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1905 return map_native_wait_result_to_managed (ret, 1);
1908 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1910 return InterlockedIncrement (location);
1913 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1915 #if SIZEOF_VOID_P == 4
1916 if (G_UNLIKELY ((size_t)location & 0x7)) {
1918 mono_interlocked_lock ();
1921 mono_interlocked_unlock ();
1925 return InterlockedIncrement64 (location);
1928 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1930 return InterlockedDecrement(location);
1933 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1935 #if SIZEOF_VOID_P == 4
1936 if (G_UNLIKELY ((size_t)location & 0x7)) {
1938 mono_interlocked_lock ();
1941 mono_interlocked_unlock ();
1945 return InterlockedDecrement64 (location);
1948 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1950 return InterlockedExchange(location, value);
1953 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1956 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1957 mono_gc_wbarrier_generic_nostore (location);
1961 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1963 return InterlockedExchangePointer(location, value);
1966 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1968 IntFloatUnion val, ret;
1971 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1977 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1979 #if SIZEOF_VOID_P == 4
1980 if (G_UNLIKELY ((size_t)location & 0x7)) {
1982 mono_interlocked_lock ();
1985 mono_interlocked_unlock ();
1989 return InterlockedExchange64 (location, value);
1993 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1995 LongDoubleUnion val, ret;
1998 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2003 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2005 return InterlockedCompareExchange(location, value, comparand);
2008 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2010 gint32 r = InterlockedCompareExchange(location, value, comparand);
2011 *success = r == comparand;
2015 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2018 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2019 mono_gc_wbarrier_generic_nostore (location);
2023 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2025 return InterlockedCompareExchangePointer(location, value, comparand);
2028 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2030 IntFloatUnion val, ret, cmp;
2033 cmp.fval = comparand;
2034 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2040 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2042 #if SIZEOF_VOID_P == 8
2043 LongDoubleUnion val, comp, ret;
2046 comp.fval = comparand;
2047 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2053 mono_interlocked_lock ();
2055 if (old == comparand)
2057 mono_interlocked_unlock ();
2064 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2066 #if SIZEOF_VOID_P == 4
2067 if (G_UNLIKELY ((size_t)location & 0x7)) {
2069 mono_interlocked_lock ();
2071 if (old == comparand)
2073 mono_interlocked_unlock ();
2077 return InterlockedCompareExchange64 (location, value, comparand);
2081 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2084 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2085 mono_gc_wbarrier_generic_nostore (location);
2090 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2093 MONO_CHECK_NULL (location, NULL);
2094 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2095 mono_gc_wbarrier_generic_nostore (location);
2100 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2102 return InterlockedAdd (location, value);
2106 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2108 #if SIZEOF_VOID_P == 4
2109 if (G_UNLIKELY ((size_t)location & 0x7)) {
2111 mono_interlocked_lock ();
2114 mono_interlocked_unlock ();
2118 return InterlockedAdd64 (location, value);
2122 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2124 #if SIZEOF_VOID_P == 4
2125 if (G_UNLIKELY ((size_t)location & 0x7)) {
2127 mono_interlocked_lock ();
2129 mono_interlocked_unlock ();
2133 return InterlockedRead64 (location);
2137 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2139 mono_memory_barrier ();
2143 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2145 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2147 if (state & ThreadState_Background) {
2148 /* If the thread changes the background mode, the main thread has to
2149 * be notified, since it has to rebuild the list of threads to
2152 mono_os_event_set (&background_change_event);
2157 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2159 mono_thread_set_state (this_obj, (MonoThreadState)state);
2161 if (state & ThreadState_Background) {
2162 /* If the thread changes the background mode, the main thread has to
2163 * be notified, since it has to rebuild the list of threads to
2166 mono_os_event_set (&background_change_event);
2171 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2175 LOCK_THREAD (this_obj);
2177 state = this_obj->state;
2179 UNLOCK_THREAD (this_obj);
2184 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2186 MonoInternalThread *current;
2188 MonoInternalThread *thread = this_obj->internal_thread;
2190 LOCK_THREAD (thread);
2192 current = mono_thread_internal_current ();
2194 thread->thread_interrupt_requested = TRUE;
2195 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2197 UNLOCK_THREAD (thread);
2200 async_abort_internal (thread, FALSE);
2205 * mono_thread_current_check_pending_interrupt:
2207 * Checks if there's a interruption request and set the pending exception if so.
2209 * @returns true if a pending exception was set
2212 mono_thread_current_check_pending_interrupt (void)
2214 MonoInternalThread *thread = mono_thread_internal_current ();
2215 gboolean throw_ = FALSE;
2217 LOCK_THREAD (thread);
2219 if (thread->thread_interrupt_requested) {
2221 thread->thread_interrupt_requested = FALSE;
2224 UNLOCK_THREAD (thread);
2227 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2232 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2234 LOCK_THREAD (thread);
2236 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2237 (thread->state & ThreadState_StopRequested) != 0 ||
2238 (thread->state & ThreadState_Stopped) != 0)
2240 UNLOCK_THREAD (thread);
2244 if ((thread->state & ThreadState_Unstarted) != 0) {
2245 thread->state |= ThreadState_Aborted;
2246 UNLOCK_THREAD (thread);
2250 thread->state |= ThreadState_AbortRequested;
2251 if (thread->abort_state_handle)
2252 mono_gchandle_free (thread->abort_state_handle);
2254 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2255 g_assert (thread->abort_state_handle);
2257 thread->abort_state_handle = 0;
2259 thread->abort_exc = NULL;
2261 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));
2263 /* During shutdown, we can't wait for other threads */
2265 /* Make sure the thread is awake */
2266 mono_thread_resume (thread);
2268 UNLOCK_THREAD (thread);
2273 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2275 if (!request_thread_abort (thread, state))
2278 if (thread == mono_thread_internal_current ()) {
2280 self_abort_internal (&error);
2281 mono_error_set_pending_exception (&error);
2283 async_abort_internal (thread, TRUE);
2288 * mono_thread_internal_abort:
2290 * Request thread @thread to be aborted.
2292 * @thread MUST NOT be the current thread.
2295 mono_thread_internal_abort (MonoInternalThread *thread)
2297 g_assert (thread != mono_thread_internal_current ());
2299 if (!request_thread_abort (thread, NULL))
2301 async_abort_internal (thread, TRUE);
2305 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2307 MonoInternalThread *thread = mono_thread_internal_current ();
2308 gboolean was_aborting;
2310 LOCK_THREAD (thread);
2311 was_aborting = thread->state & ThreadState_AbortRequested;
2312 thread->state &= ~ThreadState_AbortRequested;
2313 UNLOCK_THREAD (thread);
2315 if (!was_aborting) {
2316 const char *msg = "Unable to reset abort because no abort was requested";
2317 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2321 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2322 thread->abort_exc = NULL;
2323 if (thread->abort_state_handle) {
2324 mono_gchandle_free (thread->abort_state_handle);
2325 /* This is actually not necessary - the handle
2326 only counts if the exception is set */
2327 thread->abort_state_handle = 0;
2332 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2334 LOCK_THREAD (thread);
2336 thread->state &= ~ThreadState_AbortRequested;
2338 if (thread->abort_exc) {
2339 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2340 thread->abort_exc = NULL;
2341 if (thread->abort_state_handle) {
2342 mono_gchandle_free (thread->abort_state_handle);
2343 /* This is actually not necessary - the handle
2344 only counts if the exception is set */
2345 thread->abort_state_handle = 0;
2349 UNLOCK_THREAD (thread);
2353 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2356 MonoInternalThread *thread = this_obj->internal_thread;
2357 MonoObject *state, *deserialized = NULL;
2360 if (!thread->abort_state_handle)
2363 state = mono_gchandle_get_target (thread->abort_state_handle);
2366 domain = mono_domain_get ();
2367 if (mono_object_domain (state) == domain)
2370 deserialized = mono_object_xdomain_representation (state, domain, &error);
2372 if (!deserialized) {
2373 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2374 if (!is_ok (&error)) {
2375 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2376 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2378 mono_set_pending_exception (invalid_op_exc);
2382 return deserialized;
2386 mono_thread_suspend (MonoInternalThread *thread)
2388 LOCK_THREAD (thread);
2390 if ((thread->state & ThreadState_Unstarted) != 0 ||
2391 (thread->state & ThreadState_Aborted) != 0 ||
2392 (thread->state & ThreadState_Stopped) != 0)
2394 UNLOCK_THREAD (thread);
2398 if ((thread->state & ThreadState_Suspended) != 0 ||
2399 (thread->state & ThreadState_SuspendRequested) != 0 ||
2400 (thread->state & ThreadState_StopRequested) != 0)
2402 UNLOCK_THREAD (thread);
2406 thread->state |= ThreadState_SuspendRequested;
2407 mono_os_event_reset (thread->suspended);
2409 if (thread == mono_thread_internal_current ()) {
2410 /* calls UNLOCK_THREAD (thread) */
2411 self_suspend_internal ();
2413 /* calls UNLOCK_THREAD (thread) */
2414 async_suspend_internal (thread, FALSE);
2421 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2423 if (!mono_thread_suspend (this_obj->internal_thread)) {
2424 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2429 /* LOCKING: LOCK_THREAD(thread) must be held */
2431 mono_thread_resume (MonoInternalThread *thread)
2433 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2434 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2435 thread->state &= ~ThreadState_SuspendRequested;
2436 mono_os_event_set (thread->suspended);
2440 if ((thread->state & ThreadState_Suspended) == 0 ||
2441 (thread->state & ThreadState_Unstarted) != 0 ||
2442 (thread->state & ThreadState_Aborted) != 0 ||
2443 (thread->state & ThreadState_Stopped) != 0)
2445 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2449 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2451 mono_os_event_set (thread->suspended);
2453 if (!thread->self_suspended) {
2454 UNLOCK_THREAD (thread);
2456 /* Awake the thread */
2457 if (!mono_thread_info_resume (thread_get_tid (thread)))
2460 LOCK_THREAD (thread);
2463 thread->state &= ~ThreadState_Suspended;
2469 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2471 if (!thread->internal_thread) {
2472 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2474 LOCK_THREAD (thread->internal_thread);
2475 if (!mono_thread_resume (thread->internal_thread))
2476 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2477 UNLOCK_THREAD (thread->internal_thread);
2482 mono_threads_is_critical_method (MonoMethod *method)
2484 switch (method->wrapper_type) {
2485 case MONO_WRAPPER_RUNTIME_INVOKE:
2486 case MONO_WRAPPER_XDOMAIN_INVOKE:
2487 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2494 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2499 if (mono_threads_is_critical_method (m)) {
2500 *((gboolean*)data) = TRUE;
2507 is_running_protected_wrapper (void)
2509 gboolean found = FALSE;
2510 mono_stack_walk (find_wrapper, &found);
2515 request_thread_stop (MonoInternalThread *thread)
2517 LOCK_THREAD (thread);
2519 if ((thread->state & ThreadState_StopRequested) != 0 ||
2520 (thread->state & ThreadState_Stopped) != 0)
2522 UNLOCK_THREAD (thread);
2526 /* Make sure the thread is awake */
2527 mono_thread_resume (thread);
2529 thread->state |= ThreadState_StopRequested;
2530 thread->state &= ~ThreadState_AbortRequested;
2532 UNLOCK_THREAD (thread);
2537 * mono_thread_internal_stop:
2539 * Request thread @thread to stop.
2541 * @thread MUST NOT be the current thread.
2544 mono_thread_internal_stop (MonoInternalThread *thread)
2546 g_assert (thread != mono_thread_internal_current ());
2548 if (!request_thread_stop (thread))
2551 async_abort_internal (thread, TRUE);
2554 void mono_thread_stop (MonoThread *thread)
2556 MonoInternalThread *internal = thread->internal_thread;
2558 if (!request_thread_stop (internal))
2561 if (internal == mono_thread_internal_current ()) {
2563 self_abort_internal (&error);
2565 This function is part of the embeding API and has no way to return the exception
2566 to be thrown. So what we do is keep the old behavior and raise the exception.
2568 mono_error_raise_exception (&error); /* OK to throw, see note */
2570 async_abort_internal (internal, TRUE);
2575 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2577 gint8 tmp = *(volatile gint8 *)ptr;
2578 mono_memory_barrier ();
2583 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2585 gint16 tmp = *(volatile gint16 *)ptr;
2586 mono_memory_barrier ();
2591 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2593 gint32 tmp = *(volatile gint32 *)ptr;
2594 mono_memory_barrier ();
2599 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2601 gint64 tmp = *(volatile gint64 *)ptr;
2602 mono_memory_barrier ();
2607 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2609 volatile void *tmp = *(volatile void **)ptr;
2610 mono_memory_barrier ();
2611 return (void *) tmp;
2615 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2617 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2618 mono_memory_barrier ();
2619 return (MonoObject *) tmp;
2623 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2625 double tmp = *(volatile double *)ptr;
2626 mono_memory_barrier ();
2631 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2633 float tmp = *(volatile float *)ptr;
2634 mono_memory_barrier ();
2639 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2641 return InterlockedRead8 ((volatile gint8 *)ptr);
2645 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2647 return InterlockedRead16 ((volatile gint16 *)ptr);
2651 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2653 return InterlockedRead ((volatile gint32 *)ptr);
2657 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2659 #if SIZEOF_VOID_P == 4
2660 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2662 mono_interlocked_lock ();
2663 val = *(gint64*)ptr;
2664 mono_interlocked_unlock ();
2668 return InterlockedRead64 ((volatile gint64 *)ptr);
2672 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2674 return InterlockedReadPointer ((volatile gpointer *)ptr);
2678 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2682 #if SIZEOF_VOID_P == 4
2683 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2685 mono_interlocked_lock ();
2686 val = *(double*)ptr;
2687 mono_interlocked_unlock ();
2692 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2698 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2702 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2708 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2710 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2714 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2716 mono_memory_barrier ();
2717 *(volatile gint8 *)ptr = value;
2721 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2723 mono_memory_barrier ();
2724 *(volatile gint16 *)ptr = value;
2728 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2730 mono_memory_barrier ();
2731 *(volatile gint32 *)ptr = value;
2735 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2737 mono_memory_barrier ();
2738 *(volatile gint64 *)ptr = value;
2742 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2744 mono_memory_barrier ();
2745 *(volatile void **)ptr = value;
2749 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2751 mono_memory_barrier ();
2752 mono_gc_wbarrier_generic_store (ptr, value);
2756 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2758 mono_memory_barrier ();
2759 *(volatile double *)ptr = value;
2763 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2765 mono_memory_barrier ();
2766 *(volatile float *)ptr = value;
2770 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2772 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2776 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2778 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2782 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2784 InterlockedWrite ((volatile gint32 *)ptr, value);
2788 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2790 #if SIZEOF_VOID_P == 4
2791 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2792 mono_interlocked_lock ();
2793 *(gint64*)ptr = value;
2794 mono_interlocked_unlock ();
2799 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2803 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2805 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2809 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2813 #if SIZEOF_VOID_P == 4
2814 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2815 mono_interlocked_lock ();
2816 *(double*)ptr = value;
2817 mono_interlocked_unlock ();
2824 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2828 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2834 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2838 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2840 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2844 free_context (void *user_data)
2846 ContextStaticData *data = user_data;
2848 mono_threads_lock ();
2851 * There is no guarantee that, by the point this reference queue callback
2852 * has been invoked, the GC handle associated with the object will fail to
2853 * resolve as one might expect. So if we don't free and remove the GC
2854 * handle here, free_context_static_data_helper () could end up resolving
2855 * a GC handle to an actually-dead context which would contain a pointer
2856 * to an already-freed static data segment, resulting in a crash when
2859 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2861 mono_threads_unlock ();
2863 mono_gchandle_free (data->gc_handle);
2864 mono_free_static_data (data->static_data);
2869 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2871 mono_threads_lock ();
2873 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2876 contexts = g_hash_table_new (NULL, NULL);
2879 context_queue = mono_gc_reference_queue_new (free_context);
2881 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2882 g_hash_table_insert (contexts, gch, gch);
2885 * We use this intermediate structure to contain a duplicate pointer to
2886 * the static data because we can't rely on being able to resolve the GC
2887 * handle in the reference queue callback.
2889 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2890 data->gc_handle = GPOINTER_TO_UINT (gch);
2893 context_adjust_static_data (ctx);
2894 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2896 mono_threads_unlock ();
2898 mono_profiler_context_loaded (ctx);
2902 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2905 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2906 * cleanup in exceptional circumstances, we don't actually do any
2907 * cleanup work here. We instead do this via a reference queue.
2910 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2912 mono_profiler_context_unloaded (ctx);
2916 mono_thread_init_tls (void)
2918 MONO_FAST_TLS_INIT (tls_current_object);
2919 mono_native_tls_alloc (¤t_object_key, NULL);
2922 void mono_thread_init (MonoThreadStartCB start_cb,
2923 MonoThreadAttachCB attach_cb)
2925 mono_coop_mutex_init_recursive (&threads_mutex);
2927 mono_os_mutex_init_recursive(&interlocked_mutex);
2928 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2930 mono_os_event_init (&background_change_event, FALSE);
2932 mono_init_static_data_info (&thread_static_info);
2933 mono_init_static_data_info (&context_static_info);
2935 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2937 mono_thread_start_cb = start_cb;
2938 mono_thread_attach_cb = attach_cb;
2941 void mono_thread_cleanup (void)
2943 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
2944 /* The main thread must abandon any held mutexes (particularly
2945 * important for named mutexes as they are shared across
2946 * processes, see bug 74680.) This will happen when the
2947 * thread exits, but if it's not running in a subthread it
2948 * won't exit in time.
2950 mono_w32mutex_abandon ();
2954 /* This stuff needs more testing, it seems one of these
2955 * critical sections can be locked when mono_thread_cleanup is
2958 mono_coop_mutex_destroy (&threads_mutex);
2959 mono_os_mutex_destroy (&interlocked_mutex);
2960 mono_os_mutex_destroy (&delayed_free_table_mutex);
2961 mono_os_mutex_destroy (&small_id_mutex);
2962 mono_os_event_destroy (&background_change_event);
2965 mono_native_tls_free (current_object_key);
2969 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2971 mono_thread_cleanup_fn = func;
2975 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2977 thread->internal_thread->manage_callback = func;
2981 static void print_tids (gpointer key, gpointer value, gpointer user)
2983 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2984 * sizeof(uint) and a cast to uint would overflow
2986 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2987 * print this as a pointer.
2989 g_message ("Waiting for: %p", key);
2994 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2995 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3000 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3003 MonoThreadInfoWaitRet ret;
3005 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3007 /* Add the thread state change event, so it wakes
3008 * up if a thread changes to background mode. */
3011 if (check_state_change)
3012 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3014 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3017 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3018 /* See the comment in build_wait_tids() */
3019 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3023 for( i = 0; i < wait->num; i++)
3024 mono_threads_close_thread_handle (wait->handles [i]);
3026 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3029 if (ret < wait->num) {
3030 MonoInternalThread *internal;
3032 internal = wait->threads [ret];
3034 mono_threads_lock ();
3035 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3036 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3037 mono_threads_unlock ();
3041 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3043 struct wait_data *wait=(struct wait_data *)user;
3045 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3046 MonoInternalThread *thread=(MonoInternalThread *)value;
3048 /* Ignore background threads, we abort them later */
3049 /* Do not lock here since it is not needed and the caller holds threads_lock */
3050 if (thread->state & ThreadState_Background) {
3051 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3052 return; /* just leave, ignore */
3055 if (mono_gc_is_finalizer_internal_thread (thread)) {
3056 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3060 if (thread == mono_thread_internal_current ()) {
3061 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3065 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3066 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3070 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3071 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3075 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3076 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3077 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3078 wait->threads[wait->num]=thread;
3081 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3083 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3088 /* Just ignore the rest, we can't do anything with
3095 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3097 struct wait_data *wait=(struct wait_data *)user;
3098 MonoNativeThreadId self = mono_native_thread_id_get ();
3099 MonoInternalThread *thread = (MonoInternalThread *)value;
3101 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3104 /* The finalizer thread is not a background thread */
3105 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3106 && (thread->state & ThreadState_Background) != 0
3107 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3109 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3110 wait->threads[wait->num] = thread;
3113 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3114 mono_thread_internal_abort (thread);
3118 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3119 && !mono_gc_is_finalizer_internal_thread (thread);
3123 * mono_threads_set_shutting_down:
3125 * Is called by a thread that wants to shut down Mono. If the runtime is already
3126 * shutting down, the calling thread is suspended/stopped, and this function never
3130 mono_threads_set_shutting_down (void)
3132 MonoInternalThread *current_thread = mono_thread_internal_current ();
3134 mono_threads_lock ();
3136 if (shutting_down) {
3137 mono_threads_unlock ();
3139 /* Make sure we're properly suspended/stopped */
3141 LOCK_THREAD (current_thread);
3143 if ((current_thread->state & ThreadState_SuspendRequested) ||
3144 (current_thread->state & ThreadState_AbortRequested) ||
3145 (current_thread->state & ThreadState_StopRequested)) {
3146 UNLOCK_THREAD (current_thread);
3147 mono_thread_execute_interruption ();
3149 current_thread->state |= ThreadState_Stopped;
3150 UNLOCK_THREAD (current_thread);
3153 /*since we're killing the thread, detach it.*/
3154 mono_thread_detach_internal (current_thread);
3156 /* Wake up other threads potentially waiting for us */
3157 mono_thread_info_exit (0);
3159 shutting_down = TRUE;
3161 /* Not really a background state change, but this will
3162 * interrupt the main thread if it is waiting for all
3163 * the other threads.
3165 mono_os_event_set (&background_change_event);
3167 mono_threads_unlock ();
3171 void mono_thread_manage (void)
3173 struct wait_data wait_data;
3174 struct wait_data *wait = &wait_data;
3176 memset (wait, 0, sizeof (struct wait_data));
3177 /* join each thread that's still running */
3178 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3180 mono_threads_lock ();
3182 THREAD_DEBUG (g_message("%s: No threads", __func__));
3183 mono_threads_unlock ();
3186 mono_threads_unlock ();
3189 mono_threads_lock ();
3190 if (shutting_down) {
3191 /* somebody else is shutting down */
3192 mono_threads_unlock ();
3195 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3196 mono_g_hash_table_foreach (threads, print_tids, NULL));
3198 mono_os_event_reset (&background_change_event);
3200 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3201 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3202 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3203 mono_threads_unlock ();
3205 /* Something to wait for */
3206 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3207 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3208 } while(wait->num>0);
3210 /* Mono is shutting down, so just wait for the end */
3211 if (!mono_runtime_try_shutdown ()) {
3212 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3213 mono_thread_suspend (mono_thread_internal_current ());
3214 mono_thread_execute_interruption ();
3218 * Remove everything but the finalizer thread and self.
3219 * Also abort all the background threads
3222 mono_threads_lock ();
3225 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3226 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3227 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3229 mono_threads_unlock ();
3231 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3232 if (wait->num > 0) {
3233 /* Something to wait for */
3234 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3236 } while (wait->num > 0);
3239 * give the subthreads a chance to really quit (this is mainly needed
3240 * to get correct user and system times from getrusage/wait/time(1)).
3241 * This could be removed if we avoid pthread_detach() and use pthread_join().
3243 mono_thread_info_yield ();
3247 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3249 MonoInternalThread *thread = (MonoInternalThread*)value;
3250 struct wait_data *wait = (struct wait_data*)user_data;
3253 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3255 * This needs no locking.
3257 if ((thread->state & ThreadState_Suspended) != 0 ||
3258 (thread->state & ThreadState_Stopped) != 0)
3261 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3262 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3263 wait->threads [wait->num] = thread;
3269 * mono_thread_suspend_all_other_threads:
3271 * Suspend all managed threads except the finalizer thread and this thread. It is
3272 * not possible to resume them later.
3274 void mono_thread_suspend_all_other_threads (void)
3276 struct wait_data wait_data;
3277 struct wait_data *wait = &wait_data;
3279 MonoNativeThreadId self = mono_native_thread_id_get ();
3280 guint32 eventidx = 0;
3281 gboolean starting, finished;
3283 memset (wait, 0, sizeof (struct wait_data));
3285 * The other threads could be in an arbitrary state at this point, i.e.
3286 * they could be starting up, shutting down etc. This means that there could be
3287 * threads which are not even in the threads hash table yet.
3291 * First we set a barrier which will be checked by all threads before they
3292 * are added to the threads hash table, and they will exit if the flag is set.
3293 * This ensures that no threads could be added to the hash later.
3294 * We will use shutting_down as the barrier for now.
3296 g_assert (shutting_down);
3299 * We make multiple calls to WaitForMultipleObjects since:
3300 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3301 * - some threads could exit without becoming suspended
3306 * Make a copy of the hashtable since we can't do anything with
3307 * threads while threads_mutex is held.
3310 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3311 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3312 mono_threads_lock ();
3313 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3314 mono_threads_unlock ();
3317 /* Get the suspended events that we'll be waiting for */
3318 for (i = 0; i < wait->num; ++i) {
3319 MonoInternalThread *thread = wait->threads [i];
3321 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3322 || mono_gc_is_finalizer_internal_thread (thread)
3323 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3325 mono_threads_close_thread_handle (wait->handles [i]);
3326 wait->threads [i] = NULL;
3330 LOCK_THREAD (thread);
3332 if ((thread->state & ThreadState_Suspended) != 0 ||
3333 (thread->state & ThreadState_StopRequested) != 0 ||
3334 (thread->state & ThreadState_Stopped) != 0) {
3335 UNLOCK_THREAD (thread);
3336 mono_threads_close_thread_handle (wait->handles [i]);
3337 wait->threads [i] = NULL;
3343 /* Convert abort requests into suspend requests */
3344 if ((thread->state & ThreadState_AbortRequested) != 0)
3345 thread->state &= ~ThreadState_AbortRequested;
3347 thread->state |= ThreadState_SuspendRequested;
3348 mono_os_event_reset (thread->suspended);
3350 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3351 async_suspend_internal (thread, TRUE);
3353 mono_threads_close_thread_handle (wait->handles [i]);
3354 wait->threads [i] = NULL;
3356 if (eventidx <= 0) {
3358 * If there are threads which are starting up, we wait until they
3359 * are suspended when they try to register in the threads hash.
3360 * This is guaranteed to finish, since the threads which can create new
3361 * threads get suspended after a while.
3362 * FIXME: The finalizer thread can still create new threads.
3364 mono_threads_lock ();
3365 if (threads_starting_up)
3366 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3369 mono_threads_unlock ();
3371 mono_thread_info_sleep (100, NULL);
3379 MonoInternalThread *thread;
3380 MonoStackFrameInfo *frames;
3381 int nframes, max_frames;
3382 int nthreads, max_threads;
3383 MonoInternalThread **threads;
3384 } ThreadDumpUserData;
3386 static gboolean thread_dump_requested;
3388 /* This needs to be async safe */
3390 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3392 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3394 if (ud->nframes < ud->max_frames) {
3395 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3402 /* This needs to be async safe */
3403 static SuspendThreadResult
3404 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3406 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3407 MonoInternalThread *thread = user_data->thread;
3410 /* This no longer works with remote unwinding */
3411 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3412 mono_thread_internal_describe (thread, text);
3413 g_string_append (text, "\n");
3416 if (thread == mono_thread_internal_current ())
3417 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3419 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3421 return MonoResumeThread;
3425 int nthreads, max_threads;
3426 MonoInternalThread **threads;
3427 } CollectThreadsUserData;
3430 collect_thread (gpointer key, gpointer value, gpointer user)
3432 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3433 MonoInternalThread *thread = (MonoInternalThread *)value;
3435 if (ud->nthreads < ud->max_threads)
3436 ud->threads [ud->nthreads ++] = thread;
3440 * Collect running threads into the THREADS array.
3441 * THREADS should be an array allocated on the stack.
3444 collect_threads (MonoInternalThread **thread_array, int max_threads)
3446 CollectThreadsUserData ud;
3448 memset (&ud, 0, sizeof (ud));
3449 /* This array contains refs, but its on the stack, so its ok */
3450 ud.threads = thread_array;
3451 ud.max_threads = max_threads;
3453 mono_threads_lock ();
3454 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3455 mono_threads_unlock ();
3461 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3463 GString* text = g_string_new (0);
3465 GError *error = NULL;
3468 ud->thread = thread;
3471 /* Collect frames for the thread */
3472 if (thread == mono_thread_internal_current ()) {
3473 get_thread_dump (mono_thread_info_current (), ud);
3475 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3479 * Do all the non async-safe work outside of get_thread_dump.
3482 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3484 g_string_append_printf (text, "\n\"%s\"", name);
3487 else if (thread->threadpool_thread) {
3488 g_string_append (text, "\n\"<threadpool thread>\"");
3490 g_string_append (text, "\n\"<unnamed thread>\"");
3493 for (i = 0; i < ud->nframes; ++i) {
3494 MonoStackFrameInfo *frame = &ud->frames [i];
3495 MonoMethod *method = NULL;
3497 if (frame->type == FRAME_TYPE_MANAGED)
3498 method = mono_jit_info_get_method (frame->ji);
3501 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3502 g_string_append_printf (text, " %s\n", location);
3505 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3509 fprintf (stdout, "%s", text->str);
3511 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3512 OutputDebugStringA(text->str);
3515 g_string_free (text, TRUE);
3520 mono_threads_perform_thread_dump (void)
3522 ThreadDumpUserData ud;
3523 MonoInternalThread *thread_array [128];
3524 int tindex, nthreads;
3526 if (!thread_dump_requested)
3529 printf ("Full thread dump:\n");
3531 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3532 nthreads = collect_threads (thread_array, 128);
3534 memset (&ud, 0, sizeof (ud));
3535 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3536 ud.max_frames = 256;
3538 for (tindex = 0; tindex < nthreads; ++tindex)
3539 dump_thread (thread_array [tindex], &ud);
3543 thread_dump_requested = FALSE;
3546 /* Obtain the thread dump of all threads */
3548 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3551 ThreadDumpUserData ud;
3552 MonoInternalThread *thread_array [128];
3553 MonoDomain *domain = mono_domain_get ();
3554 MonoDebugSourceLocation *location;
3555 int tindex, nthreads;
3557 mono_error_init (error);
3559 *out_threads = NULL;
3560 *out_stack_frames = NULL;
3562 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3563 nthreads = collect_threads (thread_array, 128);
3565 memset (&ud, 0, sizeof (ud));
3566 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3567 ud.max_frames = 256;
3569 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3572 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3576 for (tindex = 0; tindex < nthreads; ++tindex) {
3577 MonoInternalThread *thread = thread_array [tindex];
3578 MonoArray *thread_frames;
3584 /* Collect frames for the thread */
3585 if (thread == mono_thread_internal_current ()) {
3586 get_thread_dump (mono_thread_info_current (), &ud);
3588 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3591 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3593 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3596 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3598 for (i = 0; i < ud.nframes; ++i) {
3599 MonoStackFrameInfo *frame = &ud.frames [i];
3600 MonoMethod *method = NULL;
3601 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3605 sf->native_offset = frame->native_offset;
3607 if (frame->type == FRAME_TYPE_MANAGED)
3608 method = mono_jit_info_get_method (frame->ji);
3611 sf->method_address = (gsize) frame->ji->code_start;
3613 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3616 MONO_OBJECT_SETREF (sf, method, rm);
3618 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3620 sf->il_offset = location->il_offset;
3622 if (location && location->source_file) {
3623 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3624 sf->line = location->row;
3625 sf->column = location->column;
3627 mono_debug_free_source_location (location);
3632 mono_array_setref (thread_frames, i, sf);
3638 return is_ok (error);
3642 * mono_threads_request_thread_dump:
3644 * Ask all threads except the current to print their stacktrace to stdout.
3647 mono_threads_request_thread_dump (void)
3649 /*The new thread dump code runs out of the finalizer thread. */
3650 thread_dump_requested = TRUE;
3651 mono_gc_finalize_notify ();
3656 gint allocated; /* +1 so that refs [allocated] == NULL */
3660 typedef struct ref_stack RefStack;
3663 ref_stack_new (gint initial_size)
3667 initial_size = MAX (initial_size, 16) + 1;
3668 rs = g_new0 (RefStack, 1);
3669 rs->refs = g_new0 (gpointer, initial_size);
3670 rs->allocated = initial_size;
3675 ref_stack_destroy (gpointer ptr)
3677 RefStack *rs = (RefStack *)ptr;
3686 ref_stack_push (RefStack *rs, gpointer ptr)
3688 g_assert (rs != NULL);
3690 if (rs->bottom >= rs->allocated) {
3691 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3692 rs->allocated <<= 1;
3693 rs->refs [rs->allocated] = NULL;
3695 rs->refs [rs->bottom++] = ptr;
3699 ref_stack_pop (RefStack *rs)
3701 if (rs == NULL || rs->bottom == 0)
3705 rs->refs [rs->bottom] = NULL;
3709 ref_stack_find (RefStack *rs, gpointer ptr)
3716 for (refs = rs->refs; refs && *refs; refs++) {
3724 * mono_thread_push_appdomain_ref:
3726 * Register that the current thread may have references to objects in domain
3727 * @domain on its stack. Each call to this function should be paired with a
3728 * call to pop_appdomain_ref.
3731 mono_thread_push_appdomain_ref (MonoDomain *domain)
3733 MonoInternalThread *thread = mono_thread_internal_current ();
3736 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3737 SPIN_LOCK (thread->lock_thread_id);
3738 if (thread->appdomain_refs == NULL)
3739 thread->appdomain_refs = ref_stack_new (16);
3740 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3741 SPIN_UNLOCK (thread->lock_thread_id);
3746 mono_thread_pop_appdomain_ref (void)
3748 MonoInternalThread *thread = mono_thread_internal_current ();
3751 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3752 SPIN_LOCK (thread->lock_thread_id);
3753 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3754 SPIN_UNLOCK (thread->lock_thread_id);
3759 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3762 SPIN_LOCK (thread->lock_thread_id);
3763 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3764 SPIN_UNLOCK (thread->lock_thread_id);
3769 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3771 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3774 typedef struct abort_appdomain_data {
3775 struct wait_data wait;
3777 } abort_appdomain_data;
3780 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3782 MonoInternalThread *thread = (MonoInternalThread*)value;
3783 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3784 MonoDomain *domain = data->domain;
3786 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3787 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3789 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3790 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3791 data->wait.threads [data->wait.num] = thread;
3794 /* Just ignore the rest, we can't do anything with
3802 * mono_threads_abort_appdomain_threads:
3804 * Abort threads which has references to the given appdomain.
3807 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3809 #ifdef __native_client__
3813 abort_appdomain_data user_data;
3815 int orig_timeout = timeout;
3818 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3820 start_time = mono_msec_ticks ();
3822 mono_threads_lock ();
3824 user_data.domain = domain;
3825 user_data.wait.num = 0;
3826 /* This shouldn't take any locks */
3827 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3828 mono_threads_unlock ();
3830 if (user_data.wait.num > 0) {
3831 /* Abort the threads outside the threads lock */
3832 for (i = 0; i < user_data.wait.num; ++i)
3833 mono_thread_internal_abort (user_data.wait.threads [i]);
3836 * We should wait for the threads either to abort, or to leave the
3837 * domain. We can't do the latter, so we wait with a timeout.
3839 wait_for_tids (&user_data.wait, 100, FALSE);
3842 /* Update remaining time */
3843 timeout -= mono_msec_ticks () - start_time;
3844 start_time = mono_msec_ticks ();
3846 if (orig_timeout != -1 && timeout < 0)
3849 while (user_data.wait.num > 0);
3851 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3857 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3859 MonoInternalThread *thread = (MonoInternalThread*)value;
3860 MonoDomain *domain = (MonoDomain*)user_data;
3863 /* No locking needed here */
3864 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3866 if (thread->cached_culture_info) {
3867 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3868 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3869 if (obj && obj->vtable->domain == domain)
3870 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3876 * mono_threads_clear_cached_culture:
3878 * Clear the cached_current_culture from all threads if it is in the
3882 mono_threads_clear_cached_culture (MonoDomain *domain)
3884 mono_threads_lock ();
3885 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3886 mono_threads_unlock ();
3890 * mono_thread_get_undeniable_exception:
3892 * Return an exception which needs to be raised when leaving a catch clause.
3893 * This is used for undeniable exception propagation.
3896 mono_thread_get_undeniable_exception (void)
3898 MonoInternalThread *thread = mono_thread_internal_current ();
3900 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3903 // We don't want to have our exception effect calls made by
3904 // the catching block
3906 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3910 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3911 * exception if the thread no longer references a dying appdomain.
3913 thread->abort_exc->trace_ips = NULL;
3914 thread->abort_exc->stack_trace = NULL;
3915 return thread->abort_exc;
3918 #if MONO_SMALL_CONFIG
3919 #define NUM_STATIC_DATA_IDX 4
3920 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3924 #define NUM_STATIC_DATA_IDX 8
3925 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3926 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3930 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3931 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3934 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3936 gpointer *static_data = (gpointer *)addr;
3938 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3939 void **ptr = (void **)static_data [i];
3944 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3945 void **p = ptr + idx;
3948 mark_func ((MonoObject**)p, gc_data);
3954 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3956 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3960 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3962 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3966 * mono_alloc_static_data
3968 * Allocate memory blocks for storing threads or context static data
3971 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3973 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3976 gpointer* static_data = *static_data_ptr;
3978 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3979 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3981 if (mono_gc_user_markers_supported ()) {
3982 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3983 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3985 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3986 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3989 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3990 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3991 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3992 *static_data_ptr = static_data;
3993 static_data [0] = static_data;
3996 for (i = 1; i <= idx; ++i) {
3997 if (static_data [i])
4000 if (mono_gc_user_markers_supported ())
4001 static_data [i] = g_malloc0 (static_data_size [i]);
4003 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4004 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4005 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4010 mono_free_static_data (gpointer* static_data)
4013 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4014 gpointer p = static_data [i];
4018 * At this point, the static data pointer array is still registered with the
4019 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4020 * data. Freeing the individual arrays without first nulling their slots
4021 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4022 * such an already freed array. See bug #13813.
4024 static_data [i] = NULL;
4025 mono_memory_write_barrier ();
4026 if (mono_gc_user_markers_supported ())
4029 mono_gc_free_fixed (p);
4031 mono_gc_free_fixed (static_data);
4035 * mono_init_static_data_info
4037 * Initializes static data counters
4039 static void mono_init_static_data_info (StaticDataInfo *static_data)
4041 static_data->idx = 0;
4042 static_data->offset = 0;
4043 static_data->freelist = NULL;
4047 * mono_alloc_static_data_slot
4049 * Generates an offset for static data. static_data contains the counters
4050 * used to generate it.
4053 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4055 if (!static_data->idx && !static_data->offset) {
4057 * we use the first chunk of the first allocation also as
4058 * an array for the rest of the data
4060 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4062 static_data->offset += align - 1;
4063 static_data->offset &= ~(align - 1);
4064 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4065 static_data->idx ++;
4066 g_assert (size <= static_data_size [static_data->idx]);
4067 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4068 static_data->offset = 0;
4070 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4071 static_data->offset += size;
4076 * LOCKING: requires that threads_mutex is held
4079 context_adjust_static_data (MonoAppContext *ctx)
4081 if (context_static_info.offset || context_static_info.idx > 0) {
4082 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4083 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4084 ctx->data->static_data = ctx->static_data;
4089 * LOCKING: requires that threads_mutex is held
4092 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4094 MonoInternalThread *thread = (MonoInternalThread *)value;
4095 guint32 offset = GPOINTER_TO_UINT (user);
4097 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4101 * LOCKING: requires that threads_mutex is held
4104 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4106 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4111 guint32 offset = GPOINTER_TO_UINT (user);
4112 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4113 ctx->data->static_data = ctx->static_data;
4116 static StaticDataFreeList*
4117 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4119 StaticDataFreeList* prev = NULL;
4120 StaticDataFreeList* tmp = static_data->freelist;
4122 if (tmp->size == size) {
4124 prev->next = tmp->next;
4126 static_data->freelist = tmp->next;
4135 #if SIZEOF_VOID_P == 4
4142 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4144 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4146 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4147 MonoBitSet *rb = sets [idx];
4148 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4149 offset /= sizeof (uintptr_t);
4150 /* offset is now the bitmap offset */
4151 for (int i = 0; i < numbits; ++i) {
4152 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4153 mono_bitset_set_fast (rb, offset + i);
4158 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4160 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4161 MonoBitSet *rb = sets [idx];
4162 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4163 offset /= sizeof (uintptr_t);
4164 /* offset is now the bitmap offset */
4165 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4166 mono_bitset_clear_fast (rb, offset + i);
4170 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4172 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4174 StaticDataInfo *info;
4177 if (static_type == SPECIAL_STATIC_THREAD) {
4178 info = &thread_static_info;
4179 sets = thread_reference_bitmaps;
4181 info = &context_static_info;
4182 sets = context_reference_bitmaps;
4185 mono_threads_lock ();
4187 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4191 offset = item->offset;
4194 offset = mono_alloc_static_data_slot (info, size, align);
4197 update_reference_bitmap (sets, offset, bitmap, numbits);
4199 if (static_type == SPECIAL_STATIC_THREAD) {
4200 /* This can be called during startup */
4201 if (threads != NULL)
4202 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4204 if (contexts != NULL)
4205 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4207 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4210 mono_threads_unlock ();
4216 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4218 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4220 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4221 return get_thread_static_data (thread, offset);
4223 return get_context_static_data (thread->current_appcontext, offset);
4228 mono_get_special_static_data (guint32 offset)
4230 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4239 * LOCKING: requires that threads_mutex is held
4242 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4244 MonoInternalThread *thread = (MonoInternalThread *)value;
4245 OffsetSize *data = (OffsetSize *)user;
4246 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4247 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4250 if (!thread->static_data || !thread->static_data [idx])
4252 ptr = ((char*) thread->static_data [idx]) + off;
4253 mono_gc_bzero_atomic (ptr, data->size);
4257 * LOCKING: requires that threads_mutex is held
4260 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4262 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4267 OffsetSize *data = (OffsetSize *)user;
4268 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4269 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4272 if (!ctx->static_data || !ctx->static_data [idx])
4275 ptr = ((char*) ctx->static_data [idx]) + off;
4276 mono_gc_bzero_atomic (ptr, data->size);
4280 do_free_special_slot (guint32 offset, guint32 size)
4282 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4284 StaticDataInfo *info;
4286 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4287 info = &thread_static_info;
4288 sets = thread_reference_bitmaps;
4290 info = &context_static_info;
4291 sets = context_reference_bitmaps;
4294 guint32 data_offset = offset;
4295 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4296 OffsetSize data = { data_offset, size };
4298 clear_reference_bitmap (sets, data.offset, data.size);
4300 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4301 if (threads != NULL)
4302 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4304 if (contexts != NULL)
4305 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4308 if (!mono_runtime_is_shutting_down ()) {
4309 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4311 item->offset = offset;
4314 item->next = info->freelist;
4315 info->freelist = item;
4320 do_free_special (gpointer key, gpointer value, gpointer data)
4322 MonoClassField *field = (MonoClassField *)key;
4323 guint32 offset = GPOINTER_TO_UINT (value);
4326 size = mono_type_size (field->type, &align);
4327 do_free_special_slot (offset, size);
4331 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4333 mono_threads_lock ();
4335 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4337 mono_threads_unlock ();
4341 static void CALLBACK dummy_apc (ULONG_PTR param)
4347 * mono_thread_execute_interruption
4349 * Performs the operation that the requested thread state requires (abort,
4352 static MonoException*
4353 mono_thread_execute_interruption (void)
4355 MonoInternalThread *thread = mono_thread_internal_current ();
4356 MonoThread *sys_thread = mono_thread_current ();
4358 LOCK_THREAD (thread);
4360 /* MonoThread::interruption_requested can only be changed with atomics */
4361 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4362 /* this will consume pending APC calls */
4364 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4366 InterlockedDecrement (&thread_interruption_requested);
4368 /* Clear the interrupted flag of the thread so it can wait again */
4369 mono_thread_info_clear_self_interrupt ();
4372 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4373 if (sys_thread->pending_exception) {
4376 exc = sys_thread->pending_exception;
4377 sys_thread->pending_exception = NULL;
4379 UNLOCK_THREAD (thread);
4381 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4382 UNLOCK_THREAD (thread);
4383 g_assert (sys_thread->pending_exception == NULL);
4384 if (thread->abort_exc == NULL) {
4386 * This might be racy, but it has to be called outside the lock
4387 * since it calls managed code.
4389 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4391 return thread->abort_exc;
4393 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4394 /* calls UNLOCK_THREAD (thread) */
4395 self_suspend_internal ();
4398 else if ((thread->state & ThreadState_StopRequested) != 0) {
4399 /* FIXME: do this through the JIT? */
4401 UNLOCK_THREAD (thread);
4403 mono_thread_exit ();
4405 } else if (thread->thread_interrupt_requested) {
4407 thread->thread_interrupt_requested = FALSE;
4408 UNLOCK_THREAD (thread);
4410 return(mono_get_exception_thread_interrupted ());
4413 UNLOCK_THREAD (thread);
4419 * mono_thread_request_interruption
4421 * A signal handler can call this method to request the interruption of a
4422 * thread. The result of the interruption will depend on the current state of
4423 * the thread. If the result is an exception that needs to be throw, it is
4424 * provided as return value.
4427 mono_thread_request_interruption (gboolean running_managed)
4429 MonoInternalThread *thread = mono_thread_internal_current ();
4431 /* The thread may already be stopping */
4436 if (thread->interrupt_on_stop &&
4437 thread->state & ThreadState_StopRequested &&
4438 thread->state & ThreadState_Background)
4441 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4443 InterlockedIncrement (&thread_interruption_requested);
4445 if (!running_managed || is_running_protected_wrapper ()) {
4446 /* Can't stop while in unmanaged code. Increase the global interruption
4447 request count. When exiting the unmanaged method the count will be
4448 checked and the thread will be interrupted. */
4450 /* this will awake the thread if it is in WaitForSingleObject
4452 /* Our implementation of this function ignores the func argument */
4454 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4456 mono_thread_info_self_interrupt ();
4461 return mono_thread_execute_interruption ();
4465 /*This function should be called by a thread after it has exited all of
4466 * its handle blocks at interruption time.*/
4468 mono_thread_resume_interruption (void)
4470 MonoInternalThread *thread = mono_thread_internal_current ();
4471 gboolean still_aborting;
4473 /* The thread may already be stopping */
4477 LOCK_THREAD (thread);
4478 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4479 UNLOCK_THREAD (thread);
4481 /*This can happen if the protected block called Thread::ResetAbort*/
4482 if (!still_aborting)
4485 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4487 InterlockedIncrement (&thread_interruption_requested);
4489 mono_thread_info_self_interrupt ();
4491 return mono_thread_execute_interruption ();
4494 gboolean mono_thread_interruption_requested ()
4496 if (thread_interruption_requested) {
4497 MonoInternalThread *thread = mono_thread_internal_current ();
4498 /* The thread may already be stopping */
4500 return (thread->interruption_requested);
4505 static MonoException*
4506 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4508 MonoInternalThread *thread = mono_thread_internal_current ();
4510 /* The thread may already be stopping */
4513 if (!thread->interruption_requested)
4515 if (!bypass_abort_protection && is_running_protected_wrapper ())
4518 return mono_thread_execute_interruption ();
4522 * Performs the interruption of the current thread, if one has been requested,
4523 * and the thread is not running a protected wrapper.
4524 * Return the exception which needs to be thrown, if any.
4527 mono_thread_interruption_checkpoint (void)
4529 return mono_thread_interruption_checkpoint_request (FALSE);
4533 * Performs the interruption of the current thread, if one has been requested.
4534 * Return the exception which needs to be thrown, if any.
4537 mono_thread_force_interruption_checkpoint_noraise (void)
4539 return mono_thread_interruption_checkpoint_request (TRUE);
4543 * mono_set_pending_exception:
4545 * Set the pending exception of the current thread to EXC.
4546 * The exception will be thrown when execution returns to managed code.
4549 mono_set_pending_exception (MonoException *exc)
4551 MonoThread *thread = mono_thread_current ();
4553 /* The thread may already be stopping */
4557 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4559 mono_thread_request_interruption (FALSE);
4563 * mono_thread_interruption_request_flag:
4565 * Returns the address of a flag that will be non-zero if an interruption has
4566 * been requested for a thread. The thread to interrupt may not be the current
4567 * thread, so an additional call to mono_thread_interruption_requested() or
4568 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4571 gint32* mono_thread_interruption_request_flag ()
4573 return &thread_interruption_requested;
4577 mono_thread_init_apartment_state (void)
4580 MonoInternalThread* thread = mono_thread_internal_current ();
4582 /* Positive return value indicates success, either
4583 * S_OK if this is first CoInitialize call, or
4584 * S_FALSE if CoInitialize already called, but with same
4585 * threading model. A negative value indicates failure,
4586 * probably due to trying to change the threading model.
4588 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4589 ? COINIT_APARTMENTTHREADED
4590 : COINIT_MULTITHREADED) < 0) {
4591 thread->apartment_state = ThreadApartmentState_Unknown;
4597 mono_thread_cleanup_apartment_state (void)
4600 MonoInternalThread* thread = mono_thread_internal_current ();
4602 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4609 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4611 LOCK_THREAD (thread);
4612 thread->state |= state;
4613 UNLOCK_THREAD (thread);
4617 * mono_thread_test_and_set_state:
4619 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4621 * Returns TRUE is @set was OR'd in.
4624 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4626 LOCK_THREAD (thread);
4628 if ((thread->state & test) != 0) {
4629 UNLOCK_THREAD (thread);
4633 thread->state |= set;
4634 UNLOCK_THREAD (thread);
4640 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4642 LOCK_THREAD (thread);
4643 thread->state &= ~state;
4644 UNLOCK_THREAD (thread);
4648 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4650 gboolean ret = FALSE;
4652 LOCK_THREAD (thread);
4654 if ((thread->state & test) != 0) {
4658 UNLOCK_THREAD (thread);
4663 static gboolean has_tls_get = FALSE;
4666 mono_runtime_set_has_tls_get (gboolean val)
4672 mono_runtime_has_tls_get (void)
4678 self_interrupt_thread (void *_unused)
4681 MonoThreadInfo *info;
4683 exc = mono_thread_execute_interruption ();
4685 if (mono_threads_is_coop_enabled ()) {
4686 /* We can return from an async call in coop, as
4687 * it's simply called when exiting the safepoint */
4691 g_error ("%s: we can't resume from an async call", __func__);
4694 info = mono_thread_info_current ();
4696 /* We must use _with_context since we didn't trampoline into the runtime */
4697 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. */
4701 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4705 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4709 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4711 MonoJitInfo **dest = (MonoJitInfo **)data;
4717 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4719 MonoJitInfo *ji = NULL;
4724 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4725 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4726 * where we hold runtime locks.
4728 if (!mono_threads_is_coop_enabled ())
4729 mono_thread_info_set_is_async_context (TRUE);
4730 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4731 if (!mono_threads_is_coop_enabled ())
4732 mono_thread_info_set_is_async_context (FALSE);
4737 MonoInternalThread *thread;
4738 gboolean install_async_abort;
4739 MonoThreadInfoInterruptToken *interrupt_token;
4742 static SuspendThreadResult
4743 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4745 AbortThreadData *data = (AbortThreadData *)ud;
4746 MonoInternalThread *thread = data->thread;
4747 MonoJitInfo *ji = NULL;
4748 gboolean protected_wrapper;
4749 gboolean running_managed;
4751 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4752 return MonoResumeThread;
4755 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4756 The protected block code will give them a chance when appropriate.
4758 if (thread->abort_protected_block_count)
4759 return MonoResumeThread;
4761 /*someone is already interrupting it*/
4762 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4763 return MonoResumeThread;
4765 InterlockedIncrement (&thread_interruption_requested);
4767 ji = mono_thread_info_get_last_managed (info);
4768 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4769 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4771 if (!protected_wrapper && running_managed) {
4772 /*We are in managed code*/
4773 /*Set the thread to call */
4774 if (data->install_async_abort)
4775 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4776 return MonoResumeThread;
4779 * This will cause waits to be broken.
4780 * It will also prevent the thread from entering a wait, so if the thread returns
4781 * from the wait before it receives the abort signal, it will just spin in the wait
4782 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4785 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4787 return MonoResumeThread;
4792 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4794 AbortThreadData data;
4796 g_assert (thread != mono_thread_internal_current ());
4798 data.thread = thread;
4799 data.install_async_abort = install_async_abort;
4800 data.interrupt_token = NULL;
4802 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4803 if (data.interrupt_token)
4804 mono_thread_info_finish_interrupt (data.interrupt_token);
4805 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4809 self_abort_internal (MonoError *error)
4813 mono_error_init (error);
4815 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4816 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4819 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.
4821 exc = mono_thread_request_interruption (TRUE);
4823 mono_error_set_exception_instance (error, exc);
4825 mono_thread_info_self_interrupt ();
4829 MonoInternalThread *thread;
4831 MonoThreadInfoInterruptToken *interrupt_token;
4832 } SuspendThreadData;
4834 static SuspendThreadResult
4835 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4837 SuspendThreadData *data = (SuspendThreadData *)ud;
4838 MonoInternalThread *thread = data->thread;
4839 MonoJitInfo *ji = NULL;
4840 gboolean protected_wrapper;
4841 gboolean running_managed;
4843 ji = mono_thread_info_get_last_managed (info);
4844 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4845 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4847 if (running_managed && !protected_wrapper) {
4848 if (mono_threads_is_coop_enabled ()) {
4849 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4850 return MonoResumeThread;
4852 thread->state &= ~ThreadState_SuspendRequested;
4853 thread->state |= ThreadState_Suspended;
4854 return KeepSuspended;
4857 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4858 InterlockedIncrement (&thread_interruption_requested);
4859 if (data->interrupt)
4860 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4862 return MonoResumeThread;
4866 /* LOCKING: called with @thread synch_cs held, and releases it */
4868 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4870 SuspendThreadData data;
4872 g_assert (thread != mono_thread_internal_current ());
4874 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4876 thread->self_suspended = FALSE;
4878 data.thread = thread;
4879 data.interrupt = interrupt;
4880 data.interrupt_token = NULL;
4882 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4883 if (data.interrupt_token)
4884 mono_thread_info_finish_interrupt (data.interrupt_token);
4886 UNLOCK_THREAD (thread);
4889 /* LOCKING: called with @thread synch_cs held, and releases it */
4891 self_suspend_internal (void)
4893 MonoInternalThread *thread;
4895 MonoOSEventWaitRet res;
4897 thread = mono_thread_internal_current ();
4899 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4901 thread->self_suspended = TRUE;
4903 thread->state &= ~ThreadState_SuspendRequested;
4904 thread->state |= ThreadState_Suspended;
4906 UNLOCK_THREAD (thread);
4908 event = thread->suspended;
4911 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT);
4912 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4917 * mono_thread_is_foreign:
4918 * @thread: the thread to query
4920 * This function allows one to determine if a thread was created by the mono runtime and has
4921 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4923 * Returns: TRUE if @thread was not created by the runtime.
4926 mono_thread_is_foreign (MonoThread *thread)
4928 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4929 return info->runtime_thread == FALSE;
4933 * mono_add_joinable_thread:
4935 * Add TID to the list of joinable threads.
4936 * LOCKING: Acquires the threads lock.
4939 mono_threads_add_joinable_thread (gpointer tid)
4943 * We cannot detach from threads because it causes problems like
4944 * 2fd16f60/r114307. So we collect them and join them when
4945 * we have time (in he finalizer thread).
4947 joinable_threads_lock ();
4948 if (!joinable_threads)
4949 joinable_threads = g_hash_table_new (NULL, NULL);
4950 g_hash_table_insert (joinable_threads, tid, tid);
4951 joinable_thread_count ++;
4952 joinable_threads_unlock ();
4954 mono_gc_finalize_notify ();
4959 * mono_threads_join_threads:
4961 * Join all joinable threads. This is called from the finalizer thread.
4962 * LOCKING: Acquires the threads lock.
4965 mono_threads_join_threads (void)
4968 GHashTableIter iter;
4975 if (!joinable_thread_count)
4979 joinable_threads_lock ();
4981 if (g_hash_table_size (joinable_threads)) {
4982 g_hash_table_iter_init (&iter, joinable_threads);
4983 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4984 thread = (pthread_t)tid;
4985 g_hash_table_remove (joinable_threads, key);
4986 joinable_thread_count --;
4989 joinable_threads_unlock ();
4991 if (thread != pthread_self ()) {
4993 /* This shouldn't block */
4994 mono_native_thread_join (thread);
5007 * Wait for thread TID to exit.
5008 * LOCKING: Acquires the threads lock.
5011 mono_thread_join (gpointer tid)
5015 gboolean found = FALSE;
5017 joinable_threads_lock ();
5018 if (!joinable_threads)
5019 joinable_threads = g_hash_table_new (NULL, NULL);
5020 if (g_hash_table_lookup (joinable_threads, tid)) {
5021 g_hash_table_remove (joinable_threads, tid);
5022 joinable_thread_count --;
5025 joinable_threads_unlock ();
5028 thread = (pthread_t)tid;
5030 mono_native_thread_join (thread);
5036 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5038 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5039 mono_thread_interruption_checkpoint ();
5043 mono_thread_internal_unhandled_exception (MonoObject* exc)
5045 MonoClass *klass = exc->vtable->klass;
5046 if (is_threadabort_exception (klass)) {
5047 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5048 } else if (!is_appdomainunloaded_exception (klass)
5049 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5050 mono_unhandled_exception (exc);
5051 if (mono_environment_exitcode_get () == 1) {
5052 mono_environment_exitcode_set (255);
5053 mono_invoke_unhandled_exception_hook (exc);
5054 g_assert_not_reached ();
5060 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5063 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5064 mono_error_set_pending_exception (&error);
5068 * mono_threads_attach_coop: called by native->managed wrappers
5072 * - @return: the original domain which needs to be restored, or NULL.
5075 * - @dummy: contains the original domain
5076 * - @return: a cookie containing current MonoThreadInfo*.
5079 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5082 gboolean fresh_thread = FALSE;
5085 /* Happens when called from AOTed code which is only used in the root domain. */
5086 domain = mono_get_root_domain ();
5091 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5092 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5093 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5094 * we're only responsible for making the cookie. */
5095 if (mono_threads_is_coop_enabled ()) {
5096 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5097 fresh_thread = !info || !mono_thread_info_is_live (info);
5100 if (!mono_thread_internal_current ()) {
5101 mono_thread_attach_full (domain, FALSE);
5104 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5107 orig = mono_domain_get ();
5109 mono_domain_set (domain, TRUE);
5111 if (!mono_threads_is_coop_enabled ())
5112 return orig != domain ? orig : NULL;
5116 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5117 * return the right cookie. */
5118 return mono_threads_enter_gc_unsafe_region_cookie ();
5121 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5122 return mono_threads_enter_gc_unsafe_region (dummy);
5127 * mono_threads_detach_coop: called by native->managed wrappers
5130 * - @cookie: the original domain which needs to be restored, or NULL.
5134 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5135 * - @dummy: contains the original domain
5138 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5140 MonoDomain *domain, *orig;
5142 if (!mono_threads_is_coop_enabled ()) {
5143 orig = (MonoDomain*) cookie;
5145 mono_domain_set (orig, TRUE);
5147 orig = (MonoDomain*) *dummy;
5149 domain = mono_domain_get ();
5152 /* it won't do anything if cookie is NULL
5153 * thread state RUNNING -> (RUNNING|BLOCKING) */
5154 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5156 if (orig != domain) {
5158 mono_domain_unset ();
5160 mono_domain_set (orig, TRUE);
5166 mono_threads_begin_abort_protected_block (void)
5168 MonoInternalThread *thread;
5170 thread = mono_thread_internal_current ();
5171 ++thread->abort_protected_block_count;
5172 mono_memory_barrier ();
5176 mono_threads_end_abort_protected_block (void)
5178 MonoInternalThread *thread;
5180 thread = mono_thread_internal_current ();
5182 mono_memory_barrier ();
5183 --thread->abort_protected_block_count;
5187 mono_thread_try_resume_interruption (void)
5189 MonoInternalThread *thread;
5191 thread = mono_thread_internal_current ();
5192 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5195 return mono_thread_resume_interruption ();
5199 /* Returns TRUE if the current thread is ready to be interrupted. */
5201 mono_threads_is_ready_to_be_interrupted (void)
5203 MonoInternalThread *thread;
5205 thread = mono_thread_internal_current ();
5206 LOCK_THREAD (thread);
5207 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5208 UNLOCK_THREAD (thread);
5212 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5213 UNLOCK_THREAD (thread);
5217 UNLOCK_THREAD (thread);
5223 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5225 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5227 if (internal->thread_info) {
5228 g_string_append (text, ", state : ");
5229 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5232 if (internal->owned_mutexes) {
5235 g_string_append (text, ", owns : [");
5236 for (i = 0; i < internal->owned_mutexes->len; i++)
5237 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5238 g_string_append (text, "]");
5243 mono_thread_internal_is_current (MonoInternalThread *internal)
5245 g_assert (internal);
5246 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));