2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/mono-threads-coop.h>
41 #include <mono/utils/hazard-pointer.h>
42 #include <mono/utils/mono-tls.h>
43 #include <mono/utils/atomic.h>
44 #include <mono/utils/mono-memory-model.h>
45 #include <mono/utils/mono-threads-coop.h>
46 #include <mono/utils/mono-error-internals.h>
47 #include <mono/utils/w32handle.h>
48 #include <mono/metadata/w32event.h>
49 #include <mono/metadata/w32mutex.h>
51 #include <mono/metadata/gc-internals.h>
52 #include <mono/metadata/reflection-internals.h>
53 #include <mono/metadata/abi-details.h>
59 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
60 #define USE_TKILL_ON_ANDROID 1
63 #ifdef PLATFORM_ANDROID
66 #ifdef USE_TKILL_ON_ANDROID
67 extern int tkill (pid_t tid, int signal);
71 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
72 #define THREAD_DEBUG(a)
73 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
74 #define THREAD_WAIT_DEBUG(a)
75 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
76 #define LIBGC_DEBUG(a)
78 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
79 #define SPIN_LOCK(i) do { \
80 if (SPIN_TRYLOCK (i)) \
84 #define SPIN_UNLOCK(i) i = 0
86 #define LOCK_THREAD(thread) lock_thread((thread))
87 #define UNLOCK_THREAD(thread) unlock_thread((thread))
99 typedef struct _StaticDataFreeList StaticDataFreeList;
100 struct _StaticDataFreeList {
101 StaticDataFreeList *next;
109 StaticDataFreeList *freelist;
112 /* Number of cached culture objects in the MonoThread->cached_culture_info array
113 * (per-type): we use the first NUM entries for CultureInfo and the last for
114 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
116 #define NUM_CACHED_CULTURES 4
117 #define CULTURES_START_IDX 0
118 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
120 /* Controls access to the 'threads' hash table */
121 static void mono_threads_lock (void);
122 static void mono_threads_unlock (void);
123 static MonoCoopMutex threads_mutex;
125 /* Controls access to the 'joinable_threads' hash table */
126 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
127 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
128 static mono_mutex_t joinable_threads_mutex;
130 /* Holds current status of static data heap */
131 static StaticDataInfo thread_static_info;
132 static StaticDataInfo context_static_info;
134 /* The hash of existing threads (key is thread ID, value is
135 * MonoInternalThread*) that need joining before exit
137 static MonoGHashTable *threads=NULL;
139 /* List of app context GC handles.
140 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
142 static GHashTable *contexts = NULL;
144 /* Cleanup queue for contexts. */
145 static MonoReferenceQueue *context_queue;
148 * Threads which are starting up and they are not in the 'threads' hash yet.
149 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
150 * Protected by mono_threads_lock ().
152 static MonoGHashTable *threads_starting_up = NULL;
154 /* The TLS key that holds the MonoObject assigned to each thread */
155 static MonoNativeTlsKey current_object_key;
158 /* Protected by the threads lock */
159 static GHashTable *joinable_threads;
160 static int joinable_thread_count;
162 #ifdef MONO_HAVE_FAST_TLS
163 /* we need to use both the Tls* functions and __thread because
164 * the gc needs to see all the threads
166 MONO_FAST_TLS_DECLARE(tls_current_object);
167 #define SET_CURRENT_OBJECT(x) do { \
168 MONO_FAST_TLS_SET (tls_current_object, x); \
169 mono_native_tls_set_value (current_object_key, x); \
171 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
173 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
174 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
177 /* function called at thread start */
178 static MonoThreadStartCB mono_thread_start_cb = NULL;
180 /* function called at thread attach */
181 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
183 /* function called at thread cleanup */
184 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
186 /* The default stack size for each thread */
187 static guint32 default_stacksize = 0;
188 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
190 static void context_adjust_static_data (MonoAppContext *ctx);
191 static void mono_free_static_data (gpointer* static_data);
192 static void mono_init_static_data_info (StaticDataInfo *static_data);
193 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
194 static gboolean mono_thread_resume (MonoInternalThread* thread);
195 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
196 static void self_abort_internal (MonoError *error);
197 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
198 static void self_suspend_internal (void);
200 static MonoException* mono_thread_execute_interruption (void);
201 static void ref_stack_destroy (gpointer rs);
203 /* Spin lock for InterlockedXXX 64 bit functions */
204 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
205 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
206 static mono_mutex_t interlocked_mutex;
208 /* global count of thread interruptions requested */
209 static gint32 thread_interruption_requested = 0;
211 /* Event signaled when a thread changes its background mode */
212 static HANDLE background_change_event;
214 static gboolean shutting_down = FALSE;
216 static gint32 managed_thread_id_counter = 0;
218 /* Class lazy loading functions */
219 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
222 mono_threads_lock (void)
224 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
228 mono_threads_unlock (void)
230 mono_locks_coop_release (&threads_mutex, ThreadsLock);
235 get_next_managed_thread_id (void)
237 return InterlockedIncrement (&managed_thread_id_counter);
241 mono_thread_get_tls_key (void)
243 return current_object_key;
247 mono_thread_get_tls_offset (void)
252 if (current_object_key)
253 offset = current_object_key;
255 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
260 static inline MonoNativeThreadId
261 thread_get_tid (MonoInternalThread *thread)
263 /* We store the tid as a guint64 to keep the object layout constant between platforms */
264 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
267 static void ensure_synch_cs_set (MonoInternalThread *thread)
269 MonoCoopMutex *synch_cs;
271 if (thread->synch_cs != NULL) {
275 synch_cs = g_new0 (MonoCoopMutex, 1);
276 mono_coop_mutex_init_recursive (synch_cs);
278 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
279 synch_cs, NULL) != NULL) {
280 /* Another thread must have installed this CS */
281 mono_coop_mutex_destroy (synch_cs);
287 lock_thread (MonoInternalThread *thread)
289 if (!thread->synch_cs)
290 ensure_synch_cs_set (thread);
292 g_assert (thread->synch_cs);
294 mono_coop_mutex_lock (thread->synch_cs);
298 unlock_thread (MonoInternalThread *thread)
300 mono_coop_mutex_unlock (thread->synch_cs);
303 static inline gboolean
304 is_appdomainunloaded_exception (MonoClass *klass)
306 return klass == mono_class_get_appdomain_unloaded_exception_class ();
309 static inline gboolean
310 is_threadabort_exception (MonoClass *klass)
312 return klass == mono_defaults.threadabortexception_class;
316 * NOTE: this function can be called also for threads different from the current one:
317 * make sure no code called from it will ever assume it is run on the thread that is
318 * getting cleaned up.
320 static void thread_cleanup (MonoInternalThread *thread)
324 g_assert (thread != NULL);
326 if (thread->abort_state_handle) {
327 mono_gchandle_free (thread->abort_state_handle);
328 thread->abort_state_handle = 0;
330 thread->abort_exc = NULL;
331 thread->current_appcontext = NULL;
334 * This is necessary because otherwise we might have
335 * cross-domain references which will not get cleaned up when
336 * the target domain is unloaded.
338 if (thread->cached_culture_info) {
340 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
341 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
345 * thread->synch_cs can be NULL if this was called after
346 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
347 * This can happen only during shutdown.
348 * The shutting_down flag is not always set, so we can't assert on it.
350 if (thread->synch_cs)
351 LOCK_THREAD (thread);
353 thread->state |= ThreadState_Stopped;
354 thread->state &= ~ThreadState_Background;
356 if (thread->synch_cs)
357 UNLOCK_THREAD (thread);
360 An interruption request has leaked to cleanup. Adjust the global counter.
362 This can happen is the abort source thread finds the abortee (this) thread
363 in unmanaged code. If this thread never trips back to managed code or check
364 the local flag it will be left set and positively unbalance the global counter.
366 Leaving the counter unbalanced will cause a performance degradation since all threads
367 will now keep checking their local flags all the time.
369 if (InterlockedExchange (&thread->interruption_requested, 0))
370 InterlockedDecrement (&thread_interruption_requested);
372 mono_threads_lock ();
376 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
377 /* We have to check whether the thread object for the
378 * tid is still the same in the table because the
379 * thread might have been destroyed and the tid reused
380 * in the meantime, in which case the tid would be in
381 * the table, but with another thread object.
385 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
389 mono_threads_unlock ();
391 /* Don't close the handle here, wait for the object finalizer
392 * to do it. Otherwise, the following race condition applies:
394 * 1) Thread exits (and thread_cleanup() closes the handle)
396 * 2) Some other handle is reassigned the same slot
398 * 3) Another thread tries to join the first thread, and
399 * blocks waiting for the reassigned handle to be signalled
400 * (which might never happen). This is possible, because the
401 * thread calling Join() still has a reference to the first
405 /* if the thread is not in the hash it has been removed already */
407 if (thread == mono_thread_internal_current ()) {
408 mono_domain_unset ();
409 mono_memory_barrier ();
411 if (mono_thread_cleanup_fn)
412 mono_thread_cleanup_fn (thread_get_tid (thread));
415 mono_release_type_locks (thread);
417 /* Can happen when we attach the profiler helper thread in order to heapshot. */
418 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
419 mono_profiler_thread_end (thread->tid);
421 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
423 if (thread == mono_thread_internal_current ()) {
425 * This will signal async signal handlers that the thread has exited.
426 * The profiler callback needs this to be set, so it cannot be done earlier.
428 mono_domain_unset ();
429 mono_memory_barrier ();
432 if (thread == mono_thread_internal_current ())
433 mono_thread_pop_appdomain_ref ();
435 thread->cached_culture_info = NULL;
437 mono_free_static_data (thread->static_data);
438 thread->static_data = NULL;
439 ref_stack_destroy (thread->appdomain_refs);
440 thread->appdomain_refs = NULL;
442 if (mono_thread_cleanup_fn)
443 mono_thread_cleanup_fn (thread_get_tid (thread));
445 if (mono_gc_is_moving ()) {
446 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
447 thread->thread_pinning_ref = NULL;
453 * A special static data offset (guint32) consists of 3 parts:
455 * [0] 6-bit index into the array of chunks.
456 * [6] 25-bit offset into the array.
457 * [31] Bit indicating thread or context static.
462 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
473 } SpecialStaticOffset;
475 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
476 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
478 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
479 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
480 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
481 (((SpecialStaticOffset *) &(x))->fields.f)
484 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
486 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
488 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
489 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
491 return ((char *) thread->static_data [idx]) + off;
495 get_context_static_data (MonoAppContext *ctx, guint32 offset)
497 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
499 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
500 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
502 return ((char *) ctx->static_data [idx]) + off;
506 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
508 static MonoClassField *current_thread_field = NULL;
512 if (!current_thread_field) {
513 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
514 g_assert (current_thread_field);
517 mono_class_vtable (domain, mono_defaults.thread_class);
518 mono_domain_lock (domain);
519 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
520 mono_domain_unlock (domain);
523 return (MonoThread **)get_thread_static_data (thread, offset);
527 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
529 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
531 g_assert (current->obj.vtable->domain == domain);
533 g_assert (!*current_thread_ptr);
534 *current_thread_ptr = current;
538 create_thread_object (MonoDomain *domain)
541 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
542 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, &error);
543 /* only possible failure mode is OOM, from which we don't expect to recover. */
544 mono_error_assert_ok (&error);
549 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
553 thread = create_thread_object (domain);
555 MONO_OBJECT_SETREF (thread, internal_thread, internal);
560 static MonoInternalThread*
561 create_internal_thread (void)
564 MonoInternalThread *thread;
567 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
568 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
569 /* only possible failure mode is OOM, from which we don't exect to recover */
570 mono_error_assert_ok (&error);
572 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
573 mono_coop_mutex_init_recursive (thread->synch_cs);
575 thread->apartment_state = ThreadApartmentState_Unknown;
576 thread->managed_id = get_next_managed_thread_id ();
577 if (mono_gc_is_moving ()) {
578 thread->thread_pinning_ref = thread;
579 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
582 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
588 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
591 g_assert (internal->handle);
593 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
594 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
595 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
600 res = SetThreadPriority (internal->handle, priority - 2);
602 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
603 #else /* HOST_WIN32 */
606 struct sched_param param;
609 tid = thread_get_tid (internal);
611 res = pthread_getschedparam (tid, &policy, ¶m);
613 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
615 #ifdef _POSIX_PRIORITY_SCHEDULING
618 /* Necessary to get valid priority range */
620 min = sched_get_priority_min (policy);
621 max = sched_get_priority_max (policy);
623 if (max > 0 && min >= 0 && max > min) {
624 double srange, drange, sposition, dposition;
625 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
627 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
628 dposition = (sposition / srange) * drange;
629 param.sched_priority = (int)(dposition + min);
636 param.sched_priority = 50;
642 param.sched_priority = 0;
645 g_error ("%s: unknown policy %d", __func__, policy);
649 res = pthread_setschedparam (tid, policy, ¶m);
652 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
655 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
657 #endif /* HOST_WIN32 */
661 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
664 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
666 MonoThreadInfo *info;
667 MonoInternalThread *internal;
668 MonoDomain *domain, *root_domain;
672 info = mono_thread_info_current ();
674 internal = thread->internal_thread;
675 internal->handle = mono_thread_info_duplicate_handle (info);
676 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
677 internal->thread_info = info;
678 internal->small_id = info->small_id;
679 internal->stack_ptr = stack_ptr;
681 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
683 SET_CURRENT_OBJECT (internal);
685 domain = mono_object_domain (thread);
687 mono_thread_push_appdomain_ref (domain);
688 if (!mono_domain_set (domain, force_domain)) {
689 mono_thread_pop_appdomain_ref ();
693 mono_threads_lock ();
695 if (threads_starting_up)
696 mono_g_hash_table_remove (threads_starting_up, thread);
698 if (shutting_down && !force_attach) {
699 mono_threads_unlock ();
704 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
705 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
708 /* We don't need to duplicate thread->handle, because it is
709 * only closed when the thread object is finalized by the GC. */
710 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
712 /* We have to do this here because mono_thread_start_cb
713 * requires that root_domain_thread is set up. */
714 if (thread_static_info.offset || thread_static_info.idx > 0) {
715 /* get the current allocated size */
716 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
717 mono_alloc_static_data (&internal->static_data, offset, TRUE);
720 mono_threads_unlock ();
722 root_domain = mono_get_root_domain ();
724 g_assert (!internal->root_domain_thread);
725 if (domain != root_domain)
726 MONO_OBJECT_SETREF (internal, root_domain_thread, new_thread_with_internal (root_domain, internal));
728 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
730 if (domain != root_domain)
731 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
733 set_current_thread_for_domain (domain, internal, thread);
735 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
743 MonoObject *start_delegate;
744 MonoObject *start_delegate_arg;
745 MonoThreadStart start_func;
746 gpointer start_func_arg;
748 MonoCoopSem registered;
751 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
754 MonoThreadStart start_func;
755 void *start_func_arg;
758 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
762 MonoInternalThread *internal;
763 MonoObject *start_delegate;
764 MonoObject *start_delegate_arg;
767 thread = start_info->thread;
768 internal = thread->internal_thread;
769 domain = mono_object_domain (start_info->thread);
771 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
773 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
774 start_info->failed = TRUE;
776 mono_coop_sem_post (&start_info->registered);
778 if (InterlockedDecrement (&start_info->ref) == 0) {
779 mono_coop_sem_destroy (&start_info->registered);
786 mono_thread_internal_set_priority (internal, internal->priority);
790 start_delegate = start_info->start_delegate;
791 start_delegate_arg = start_info->start_delegate_arg;
792 start_func = start_info->start_func;
793 start_func_arg = start_info->start_func_arg;
795 /* This MUST be called before any managed code can be
796 * executed, as it calls the callback function that (for the
797 * jit) sets the lmf marker.
800 if (mono_thread_start_cb)
801 mono_thread_start_cb (tid, stack_ptr, start_func);
803 /* On 2.0 profile (and higher), set explicitly since state might have been
805 if (internal->apartment_state == ThreadApartmentState_Unknown)
806 internal->apartment_state = ThreadApartmentState_MTA;
808 mono_thread_init_apartment_state ();
810 /* Let the thread that called Start() know we're ready */
811 mono_coop_sem_post (&start_info->registered);
813 if (InterlockedDecrement (&start_info->ref) == 0) {
814 mono_coop_sem_destroy (&start_info->registered);
818 /* start_info is not valid anymore */
822 * Call this after calling start_notify, since the profiler callback might want
823 * to lock the thread, and the lock is held by thread_start () which waits for
826 mono_profiler_thread_start (tid);
828 /* if the name was set before starting, we didn't invoke the profiler callback */
829 if (internal->name) {
830 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
831 mono_profiler_thread_name (internal->tid, tname);
832 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
836 /* start_func is set only for unmanaged start functions */
838 start_func (start_func_arg);
842 g_assert (start_delegate != NULL);
844 /* we may want to handle the exception here. See comment below on unhandled exceptions */
845 args [0] = (gpointer) start_delegate_arg;
846 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
848 if (!mono_error_ok (&error)) {
849 MonoException *ex = mono_error_convert_to_exception (&error);
851 g_assert (ex != NULL);
852 MonoClass *klass = mono_object_get_class (&ex->object);
853 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
854 !is_threadabort_exception (klass)) {
855 mono_unhandled_exception (&ex->object);
856 mono_invoke_unhandled_exception_hook (&ex->object);
857 g_assert_not_reached ();
860 mono_error_cleanup (&error);
864 /* If the thread calls ExitThread at all, this remaining code
865 * will not be executed, but the main thread will eventually
866 * call thread_cleanup() on this thread's behalf.
869 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
871 /* Do any cleanup needed for apartment state. This
872 * cannot be done in thread_cleanup since thread_cleanup could be
873 * called for a thread other than the current thread.
874 * mono_thread_cleanup_apartment_state cleans up apartment
875 * for the current thead */
876 mono_thread_cleanup_apartment_state ();
878 mono_thread_detach_internal (internal);
885 static gsize WINAPI start_wrapper(void *data)
887 volatile gsize dummy;
889 /* Avoid scanning the frames above this frame during a GC */
890 mono_gc_set_stack_end ((void*)&dummy);
892 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
898 * Common thread creation code.
899 * LOCKING: Acquires the threads lock.
902 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
903 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
905 StartInfo *start_info = NULL;
906 HANDLE thread_handle;
907 MonoNativeThreadId tid;
911 g_assert (!start_func && !start_func_arg);
913 g_assert (!start_delegate);
916 * Join joinable threads to prevent running out of threads since the finalizer
917 * thread might be blocked/backlogged.
919 mono_threads_join_threads ();
921 mono_error_init (error);
923 mono_threads_lock ();
925 mono_threads_unlock ();
928 if (threads_starting_up == NULL) {
929 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
930 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
932 mono_g_hash_table_insert (threads_starting_up, thread, thread);
933 mono_threads_unlock ();
935 internal->threadpool_thread = threadpool_thread;
936 if (threadpool_thread)
937 mono_thread_set_state (internal, ThreadState_Background);
939 start_info = g_new0 (StartInfo, 1);
941 start_info->thread = thread;
942 start_info->start_delegate = start_delegate;
943 start_info->start_delegate_arg = thread->start_obj;
944 start_info->start_func = start_func;
945 start_info->start_func_arg = start_func_arg;
946 start_info->failed = FALSE;
947 mono_coop_sem_init (&start_info->registered, 0);
950 stack_size = default_stacksize_for_thread (internal);
952 thread_handle = mono_threads_create_thread (start_wrapper, start_info, stack_size, &tid);
954 if (thread_handle == NULL) {
955 /* The thread couldn't be created, so set an exception */
956 mono_threads_lock ();
957 mono_g_hash_table_remove (threads_starting_up, thread);
958 mono_threads_unlock ();
959 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
960 /* ref is not going to be decremented in start_wrapper_internal */
961 InterlockedDecrement (&start_info->ref);
966 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
969 * Wait for the thread to set up its TLS data etc, so
970 * theres no potential race condition if someone tries
971 * to look up the data believing the thread has
975 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
977 mono_threads_close_thread_handle (thread_handle);
979 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));
981 ret = !start_info->failed;
984 if (InterlockedDecrement (&start_info->ref) == 0) {
985 mono_coop_sem_destroy (&start_info->registered);
992 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
994 if (mono_thread_start_cb) {
995 mono_thread_start_cb (tid, stack_start, func);
999 void mono_threads_set_default_stacksize (guint32 stacksize)
1001 default_stacksize = stacksize;
1004 guint32 mono_threads_get_default_stacksize (void)
1006 return default_stacksize;
1010 * mono_thread_create_internal:
1012 * ARG should not be a GC reference.
1015 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
1018 MonoInternalThread *internal;
1021 mono_error_init (error);
1023 thread = create_thread_object (domain);
1025 internal = create_internal_thread ();
1027 MONO_OBJECT_SETREF (thread, internal_thread, internal);
1029 LOCK_THREAD (internal);
1031 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
1032 return_val_if_nok (error, NULL);
1034 UNLOCK_THREAD (internal);
1040 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1043 if (!mono_thread_create_checked (domain, func, arg, &error))
1044 mono_error_cleanup (&error);
1048 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1050 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
1054 mono_thread_attach (MonoDomain *domain)
1056 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1062 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1064 MonoInternalThread *internal;
1066 MonoNativeThreadId tid;
1069 if (mono_thread_internal_current_is_attached ()) {
1070 if (domain != mono_domain_get ())
1071 mono_domain_set (domain, TRUE);
1072 /* Already attached */
1073 return mono_thread_current ();
1076 if (!mono_gc_register_thread (&domain)) {
1077 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 ());
1080 tid=mono_native_thread_id_get ();
1082 internal = create_internal_thread ();
1084 thread = new_thread_with_internal (domain, internal);
1086 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
1087 /* Mono is shutting down, so just wait for the end */
1089 mono_thread_info_sleep (10000, NULL);
1092 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1094 if (mono_thread_attach_cb) {
1098 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1101 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1103 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1106 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1107 if (!mono_thread_info_current ()->tools_thread)
1108 // FIXME: Need a separate callback
1109 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1115 mono_thread_detach_internal (MonoInternalThread *thread)
1117 g_return_if_fail (thread != NULL);
1119 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1122 mono_w32mutex_abandon ();
1125 thread_cleanup (thread);
1127 SET_CURRENT_OBJECT (NULL);
1128 mono_domain_unset ();
1130 /* Don't need to close the handle to this thread, even though we took a
1131 * reference in mono_thread_attach (), because the GC will do it
1132 * when the Thread object is finalised.
1137 mono_thread_detach (MonoThread *thread)
1140 mono_thread_detach_internal (thread->internal_thread);
1144 * mono_thread_detach_if_exiting:
1146 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1147 * This should be used at the end of embedding code which calls into managed code, and which
1148 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1151 mono_thread_detach_if_exiting (void)
1153 if (mono_thread_info_is_exiting ()) {
1154 MonoInternalThread *thread;
1156 thread = mono_thread_internal_current ();
1158 mono_thread_detach_internal (thread);
1159 mono_thread_info_detach ();
1167 mono_thread_internal_current_is_attached (void)
1169 MonoInternalThread *internal;
1171 internal = GET_CURRENT_OBJECT ();
1179 mono_thread_exit (void)
1181 MonoInternalThread *thread = mono_thread_internal_current ();
1183 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1185 mono_thread_detach_internal (thread);
1187 /* we could add a callback here for embedders to use. */
1188 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1189 exit (mono_environment_exitcode_get ());
1191 mono_thread_info_exit ();
1195 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1197 MonoInternalThread *internal;
1199 internal = create_internal_thread ();
1201 internal->state = ThreadState_Unstarted;
1203 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1207 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1211 MonoInternalThread *internal;
1214 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1216 if (!this_obj->internal_thread)
1217 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1218 internal = this_obj->internal_thread;
1220 LOCK_THREAD (internal);
1222 if ((internal->state & ThreadState_Unstarted) == 0) {
1223 UNLOCK_THREAD (internal);
1224 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1228 if ((internal->state & ThreadState_Aborted) != 0) {
1229 UNLOCK_THREAD (internal);
1233 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1235 mono_error_cleanup (&error);
1236 UNLOCK_THREAD (internal);
1240 internal->state &= ~ThreadState_Unstarted;
1242 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1244 UNLOCK_THREAD (internal);
1245 return internal->handle;
1249 * This is called from the finalizer of the internal thread object.
1252 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1254 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1257 * Since threads keep a reference to their thread object while running, by the time this function is called,
1258 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1259 * when thread_cleanup () can be called after this.
1262 mono_threads_close_thread_handle (thread);
1264 if (this_obj->synch_cs) {
1265 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1266 this_obj->synch_cs = NULL;
1267 mono_coop_mutex_destroy (synch_cs);
1271 if (this_obj->name) {
1272 void *name = this_obj->name;
1273 this_obj->name = NULL;
1279 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1282 MonoInternalThread *thread = mono_thread_internal_current ();
1284 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1286 if (mono_thread_current_check_pending_interrupt ())
1290 gboolean alerted = FALSE;
1292 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1294 res = mono_thread_info_sleep (ms, &alerted);
1296 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1299 MonoException* exc = mono_thread_execute_interruption ();
1301 mono_raise_exception (exc);
1313 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1318 ves_icall_System_Threading_Thread_GetDomainID (void)
1320 return mono_domain_get()->domain_id;
1324 ves_icall_System_Threading_Thread_Yield (void)
1326 return mono_thread_info_yield ();
1330 * mono_thread_get_name:
1332 * Return the name of the thread. NAME_LEN is set to the length of the name.
1333 * Return NULL if the thread has no name. The returned memory is owned by the
1337 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1341 LOCK_THREAD (this_obj);
1343 if (!this_obj->name) {
1347 *name_len = this_obj->name_len;
1348 res = g_new (gunichar2, this_obj->name_len);
1349 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1352 UNLOCK_THREAD (this_obj);
1358 * mono_thread_get_name_utf8:
1360 * Return the name of the thread in UTF-8.
1361 * Return NULL if the thread has no name.
1362 * The returned memory is owned by the caller.
1365 mono_thread_get_name_utf8 (MonoThread *thread)
1370 MonoInternalThread *internal = thread->internal_thread;
1371 if (internal == NULL)
1374 LOCK_THREAD (internal);
1376 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1378 UNLOCK_THREAD (internal);
1384 * mono_thread_get_managed_id:
1386 * Return the Thread.ManagedThreadId value of `thread`.
1387 * Returns -1 if `thread` is NULL.
1390 mono_thread_get_managed_id (MonoThread *thread)
1395 MonoInternalThread *internal = thread->internal_thread;
1396 if (internal == NULL)
1399 int32_t id = internal->managed_id;
1405 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1410 mono_error_init (&error);
1412 LOCK_THREAD (this_obj);
1414 if (!this_obj->name)
1417 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1419 UNLOCK_THREAD (this_obj);
1421 if (mono_error_set_pending_exception (&error))
1428 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1430 LOCK_THREAD (this_obj);
1432 mono_error_init (error);
1434 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1435 UNLOCK_THREAD (this_obj);
1437 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1440 if (this_obj->name) {
1441 g_free (this_obj->name);
1442 this_obj->name_len = 0;
1445 this_obj->name = g_new (gunichar2, mono_string_length (name));
1446 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1447 this_obj->name_len = mono_string_length (name);
1450 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1453 this_obj->name = NULL;
1456 UNLOCK_THREAD (this_obj);
1458 if (this_obj->name && this_obj->tid) {
1459 char *tname = mono_string_to_utf8_checked (name, error);
1460 return_if_nok (error);
1461 mono_profiler_thread_name (this_obj->tid, tname);
1462 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1468 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1471 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1472 mono_error_set_pending_exception (&error);
1476 * ves_icall_System_Threading_Thread_GetPriority_internal:
1477 * @param this_obj: The MonoInternalThread on which to operate.
1479 * Gets the priority of the given thread.
1480 * @return: The priority of the given thread.
1483 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1486 MonoInternalThread *internal = this_obj->internal_thread;
1488 LOCK_THREAD (internal);
1489 priority = internal->priority;
1490 UNLOCK_THREAD (internal);
1496 * ves_icall_System_Threading_Thread_SetPriority_internal:
1497 * @param this_obj: The MonoInternalThread on which to operate.
1498 * @param priority: The priority to set.
1500 * Sets the priority of the given thread.
1503 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1505 MonoInternalThread *internal = this_obj->internal_thread;
1507 LOCK_THREAD (internal);
1508 internal->priority = priority;
1509 if (internal->handle != NULL)
1510 mono_thread_internal_set_priority (internal, priority);
1511 UNLOCK_THREAD (internal);
1514 /* If the array is already in the requested domain, we just return it,
1515 otherwise we return a copy in that domain. */
1517 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1521 mono_error_init (error);
1525 if (mono_object_domain (arr) == domain)
1528 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1529 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1534 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1537 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1538 mono_error_set_pending_exception (&error);
1543 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1546 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1547 mono_error_set_pending_exception (&error);
1552 mono_thread_current (void)
1554 MonoDomain *domain = mono_domain_get ();
1555 MonoInternalThread *internal = mono_thread_internal_current ();
1556 MonoThread **current_thread_ptr;
1558 g_assert (internal);
1559 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1561 if (!*current_thread_ptr) {
1562 g_assert (domain != mono_get_root_domain ());
1563 *current_thread_ptr = new_thread_with_internal (domain, internal);
1565 return *current_thread_ptr;
1568 /* Return the thread object belonging to INTERNAL in the current domain */
1570 mono_thread_current_for_thread (MonoInternalThread *internal)
1572 MonoDomain *domain = mono_domain_get ();
1573 MonoThread **current_thread_ptr;
1575 g_assert (internal);
1576 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1578 if (!*current_thread_ptr) {
1579 g_assert (domain != mono_get_root_domain ());
1580 *current_thread_ptr = new_thread_with_internal (domain, internal);
1582 return *current_thread_ptr;
1586 mono_thread_internal_current (void)
1588 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1589 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1594 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1596 MonoInternalThread *thread = this_obj->internal_thread;
1597 HANDLE handle = thread->handle;
1598 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1601 if (mono_thread_current_check_pending_interrupt ())
1604 LOCK_THREAD (thread);
1606 if ((thread->state & ThreadState_Unstarted) != 0) {
1607 UNLOCK_THREAD (thread);
1609 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1613 UNLOCK_THREAD (thread);
1618 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1620 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1623 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1626 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1628 if(ret==WAIT_OBJECT_0) {
1629 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1634 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1639 #define MANAGED_WAIT_FAILED 0x7fffffff
1642 map_native_wait_result_to_managed (gint32 val)
1644 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1645 return val == WAIT_FAILED ? MANAGED_WAIT_FAILED : val;
1649 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1657 mono_error_init (error);
1659 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1662 if (numhandles != 1)
1663 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE);
1665 ret = WaitForSingleObjectEx (handles [0], ms, TRUE);
1668 if (ret != WAIT_IO_COMPLETION)
1671 exc = mono_thread_execute_interruption ();
1673 mono_error_set_exception_instance (error, exc);
1680 /* Re-calculate ms according to the time passed */
1681 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1682 if (diff_ms >= ms) {
1686 wait = ms - diff_ms;
1692 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1699 MonoObject *waitHandle;
1700 MonoInternalThread *thread = mono_thread_internal_current ();
1702 /* Do this WaitSleepJoin check before creating objects */
1703 if (mono_thread_current_check_pending_interrupt ())
1704 return map_native_wait_result_to_managed (WAIT_FAILED);
1706 /* We fail in managed if the array has more than 64 elements */
1707 numhandles = (guint32)mono_array_length(mono_handles);
1708 handles = g_new0(HANDLE, numhandles);
1710 for(i = 0; i < numhandles; i++) {
1711 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1712 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1719 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1721 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1723 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1727 mono_error_set_pending_exception (&error);
1729 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1730 return map_native_wait_result_to_managed (ret);
1733 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1736 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1737 uintptr_t numhandles;
1740 MonoObject *waitHandle;
1741 MonoInternalThread *thread = mono_thread_internal_current ();
1743 /* Do this WaitSleepJoin check before creating objects */
1744 if (mono_thread_current_check_pending_interrupt ())
1745 return map_native_wait_result_to_managed (WAIT_FAILED);
1747 numhandles = mono_array_length(mono_handles);
1748 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1749 return map_native_wait_result_to_managed (WAIT_FAILED);
1751 for(i = 0; i < numhandles; i++) {
1752 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1753 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1760 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1762 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1764 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1766 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1768 mono_error_set_pending_exception (&error);
1770 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1771 return map_native_wait_result_to_managed (ret);
1774 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1778 MonoInternalThread *thread = mono_thread_internal_current ();
1780 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1786 if (mono_thread_current_check_pending_interrupt ())
1787 return map_native_wait_result_to_managed (WAIT_FAILED);
1789 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1791 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1793 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1795 mono_error_set_pending_exception (&error);
1796 return map_native_wait_result_to_managed (ret);
1800 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1803 MonoInternalThread *thread = mono_thread_internal_current ();
1808 if (mono_thread_current_check_pending_interrupt ())
1809 return map_native_wait_result_to_managed (WAIT_FAILED);
1811 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1814 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1817 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1819 return map_native_wait_result_to_managed (ret);
1822 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1824 return InterlockedIncrement (location);
1827 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1829 #if SIZEOF_VOID_P == 4
1830 if (G_UNLIKELY ((size_t)location & 0x7)) {
1832 mono_interlocked_lock ();
1835 mono_interlocked_unlock ();
1839 return InterlockedIncrement64 (location);
1842 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1844 return InterlockedDecrement(location);
1847 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1849 #if SIZEOF_VOID_P == 4
1850 if (G_UNLIKELY ((size_t)location & 0x7)) {
1852 mono_interlocked_lock ();
1855 mono_interlocked_unlock ();
1859 return InterlockedDecrement64 (location);
1862 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1864 return InterlockedExchange(location, value);
1867 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1870 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1871 mono_gc_wbarrier_generic_nostore (location);
1875 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1877 return InterlockedExchangePointer(location, value);
1880 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1882 IntFloatUnion val, ret;
1885 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1891 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1893 #if SIZEOF_VOID_P == 4
1894 if (G_UNLIKELY ((size_t)location & 0x7)) {
1896 mono_interlocked_lock ();
1899 mono_interlocked_unlock ();
1903 return InterlockedExchange64 (location, value);
1907 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1909 LongDoubleUnion val, ret;
1912 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1917 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1919 return InterlockedCompareExchange(location, value, comparand);
1922 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1924 gint32 r = InterlockedCompareExchange(location, value, comparand);
1925 *success = r == comparand;
1929 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1932 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1933 mono_gc_wbarrier_generic_nostore (location);
1937 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1939 return InterlockedCompareExchangePointer(location, value, comparand);
1942 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1944 IntFloatUnion val, ret, cmp;
1947 cmp.fval = comparand;
1948 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1954 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1956 #if SIZEOF_VOID_P == 8
1957 LongDoubleUnion val, comp, ret;
1960 comp.fval = comparand;
1961 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1967 mono_interlocked_lock ();
1969 if (old == comparand)
1971 mono_interlocked_unlock ();
1978 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1980 #if SIZEOF_VOID_P == 4
1981 if (G_UNLIKELY ((size_t)location & 0x7)) {
1983 mono_interlocked_lock ();
1985 if (old == comparand)
1987 mono_interlocked_unlock ();
1991 return InterlockedCompareExchange64 (location, value, comparand);
1995 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1998 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
1999 mono_gc_wbarrier_generic_nostore (location);
2004 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2007 MONO_CHECK_NULL (location, NULL);
2008 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2009 mono_gc_wbarrier_generic_nostore (location);
2014 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2016 return InterlockedAdd (location, value);
2020 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2022 #if SIZEOF_VOID_P == 4
2023 if (G_UNLIKELY ((size_t)location & 0x7)) {
2025 mono_interlocked_lock ();
2028 mono_interlocked_unlock ();
2032 return InterlockedAdd64 (location, value);
2036 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2038 #if SIZEOF_VOID_P == 4
2039 if (G_UNLIKELY ((size_t)location & 0x7)) {
2041 mono_interlocked_lock ();
2043 mono_interlocked_unlock ();
2047 return InterlockedRead64 (location);
2051 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2053 mono_memory_barrier ();
2057 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2059 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2061 if (state & ThreadState_Background) {
2062 /* If the thread changes the background mode, the main thread has to
2063 * be notified, since it has to rebuild the list of threads to
2066 mono_w32event_set (background_change_event);
2071 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2073 mono_thread_set_state (this_obj, (MonoThreadState)state);
2075 if (state & ThreadState_Background) {
2076 /* If the thread changes the background mode, the main thread has to
2077 * be notified, since it has to rebuild the list of threads to
2080 mono_w32event_set (background_change_event);
2085 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2089 LOCK_THREAD (this_obj);
2091 state = this_obj->state;
2093 UNLOCK_THREAD (this_obj);
2098 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2100 MonoInternalThread *current;
2102 MonoInternalThread *thread = this_obj->internal_thread;
2104 LOCK_THREAD (thread);
2106 current = mono_thread_internal_current ();
2108 thread->thread_interrupt_requested = TRUE;
2109 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2111 UNLOCK_THREAD (thread);
2114 async_abort_internal (thread, FALSE);
2119 * mono_thread_current_check_pending_interrupt:
2121 * Checks if there's a interruption request and set the pending exception if so.
2123 * @returns true if a pending exception was set
2126 mono_thread_current_check_pending_interrupt (void)
2128 MonoInternalThread *thread = mono_thread_internal_current ();
2129 gboolean throw_ = FALSE;
2131 LOCK_THREAD (thread);
2133 if (thread->thread_interrupt_requested) {
2135 thread->thread_interrupt_requested = FALSE;
2138 UNLOCK_THREAD (thread);
2141 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2146 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2148 LOCK_THREAD (thread);
2150 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2151 (thread->state & ThreadState_StopRequested) != 0 ||
2152 (thread->state & ThreadState_Stopped) != 0)
2154 UNLOCK_THREAD (thread);
2158 if ((thread->state & ThreadState_Unstarted) != 0) {
2159 thread->state |= ThreadState_Aborted;
2160 UNLOCK_THREAD (thread);
2164 thread->state |= ThreadState_AbortRequested;
2165 if (thread->abort_state_handle)
2166 mono_gchandle_free (thread->abort_state_handle);
2168 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2169 g_assert (thread->abort_state_handle);
2171 thread->abort_state_handle = 0;
2173 thread->abort_exc = NULL;
2175 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));
2177 /* During shutdown, we can't wait for other threads */
2179 /* Make sure the thread is awake */
2180 mono_thread_resume (thread);
2182 UNLOCK_THREAD (thread);
2187 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2189 if (!request_thread_abort (thread, state))
2192 if (thread == mono_thread_internal_current ()) {
2194 self_abort_internal (&error);
2195 mono_error_set_pending_exception (&error);
2197 async_abort_internal (thread, TRUE);
2202 * mono_thread_internal_abort:
2204 * Request thread @thread to be aborted.
2206 * @thread MUST NOT be the current thread.
2209 mono_thread_internal_abort (MonoInternalThread *thread)
2211 g_assert (thread != mono_thread_internal_current ());
2213 if (!request_thread_abort (thread, NULL))
2215 async_abort_internal (thread, TRUE);
2219 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2221 MonoInternalThread *thread = mono_thread_internal_current ();
2222 gboolean was_aborting;
2224 LOCK_THREAD (thread);
2225 was_aborting = thread->state & ThreadState_AbortRequested;
2226 thread->state &= ~ThreadState_AbortRequested;
2227 UNLOCK_THREAD (thread);
2229 if (!was_aborting) {
2230 const char *msg = "Unable to reset abort because no abort was requested";
2231 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2234 thread->abort_exc = NULL;
2235 if (thread->abort_state_handle) {
2236 mono_gchandle_free (thread->abort_state_handle);
2237 /* This is actually not necessary - the handle
2238 only counts if the exception is set */
2239 thread->abort_state_handle = 0;
2244 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2246 LOCK_THREAD (thread);
2248 thread->state &= ~ThreadState_AbortRequested;
2250 if (thread->abort_exc) {
2251 thread->abort_exc = NULL;
2252 if (thread->abort_state_handle) {
2253 mono_gchandle_free (thread->abort_state_handle);
2254 /* This is actually not necessary - the handle
2255 only counts if the exception is set */
2256 thread->abort_state_handle = 0;
2260 UNLOCK_THREAD (thread);
2264 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2267 MonoInternalThread *thread = this_obj->internal_thread;
2268 MonoObject *state, *deserialized = NULL;
2271 if (!thread->abort_state_handle)
2274 state = mono_gchandle_get_target (thread->abort_state_handle);
2277 domain = mono_domain_get ();
2278 if (mono_object_domain (state) == domain)
2281 deserialized = mono_object_xdomain_representation (state, domain, &error);
2283 if (!deserialized) {
2284 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2285 if (!is_ok (&error)) {
2286 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2287 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2289 mono_set_pending_exception (invalid_op_exc);
2293 return deserialized;
2297 mono_thread_suspend (MonoInternalThread *thread)
2299 LOCK_THREAD (thread);
2301 if ((thread->state & ThreadState_Unstarted) != 0 ||
2302 (thread->state & ThreadState_Aborted) != 0 ||
2303 (thread->state & ThreadState_Stopped) != 0)
2305 UNLOCK_THREAD (thread);
2309 if ((thread->state & ThreadState_Suspended) != 0 ||
2310 (thread->state & ThreadState_SuspendRequested) != 0 ||
2311 (thread->state & ThreadState_StopRequested) != 0)
2313 UNLOCK_THREAD (thread);
2317 thread->state |= ThreadState_SuspendRequested;
2319 if (thread == mono_thread_internal_current ()) {
2320 /* calls UNLOCK_THREAD (thread) */
2321 self_suspend_internal ();
2323 /* calls UNLOCK_THREAD (thread) */
2324 async_suspend_internal (thread, FALSE);
2331 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2333 if (!mono_thread_suspend (this_obj->internal_thread)) {
2334 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2339 /* LOCKING: LOCK_THREAD(thread) must be held */
2341 mono_thread_resume (MonoInternalThread *thread)
2343 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2344 thread->state &= ~ThreadState_SuspendRequested;
2348 if ((thread->state & ThreadState_Suspended) == 0 ||
2349 (thread->state & ThreadState_Unstarted) != 0 ||
2350 (thread->state & ThreadState_Aborted) != 0 ||
2351 (thread->state & ThreadState_Stopped) != 0)
2356 UNLOCK_THREAD (thread);
2358 /* Awake the thread */
2359 if (!mono_thread_info_resume (thread_get_tid (thread)))
2362 LOCK_THREAD (thread);
2364 thread->state &= ~ThreadState_Suspended;
2370 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2372 if (!thread->internal_thread) {
2373 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2375 LOCK_THREAD (thread->internal_thread);
2376 if (!mono_thread_resume (thread->internal_thread))
2377 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2378 UNLOCK_THREAD (thread->internal_thread);
2383 mono_threads_is_critical_method (MonoMethod *method)
2385 switch (method->wrapper_type) {
2386 case MONO_WRAPPER_RUNTIME_INVOKE:
2387 case MONO_WRAPPER_XDOMAIN_INVOKE:
2388 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2395 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2400 if (mono_threads_is_critical_method (m)) {
2401 *((gboolean*)data) = TRUE;
2408 is_running_protected_wrapper (void)
2410 gboolean found = FALSE;
2411 mono_stack_walk (find_wrapper, &found);
2416 request_thread_stop (MonoInternalThread *thread)
2418 LOCK_THREAD (thread);
2420 if ((thread->state & ThreadState_StopRequested) != 0 ||
2421 (thread->state & ThreadState_Stopped) != 0)
2423 UNLOCK_THREAD (thread);
2427 /* Make sure the thread is awake */
2428 mono_thread_resume (thread);
2430 thread->state |= ThreadState_StopRequested;
2431 thread->state &= ~ThreadState_AbortRequested;
2433 UNLOCK_THREAD (thread);
2438 * mono_thread_internal_stop:
2440 * Request thread @thread to stop.
2442 * @thread MUST NOT be the current thread.
2445 mono_thread_internal_stop (MonoInternalThread *thread)
2447 g_assert (thread != mono_thread_internal_current ());
2449 if (!request_thread_stop (thread))
2452 async_abort_internal (thread, TRUE);
2455 void mono_thread_stop (MonoThread *thread)
2457 MonoInternalThread *internal = thread->internal_thread;
2459 if (!request_thread_stop (internal))
2462 if (internal == mono_thread_internal_current ()) {
2464 self_abort_internal (&error);
2466 This function is part of the embeding API and has no way to return the exception
2467 to be thrown. So what we do is keep the old behavior and raise the exception.
2469 mono_error_raise_exception (&error); /* OK to throw, see note */
2471 async_abort_internal (internal, TRUE);
2476 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2478 gint8 tmp = *(volatile gint8 *)ptr;
2479 mono_memory_barrier ();
2484 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2486 gint16 tmp = *(volatile gint16 *)ptr;
2487 mono_memory_barrier ();
2492 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2494 gint32 tmp = *(volatile gint32 *)ptr;
2495 mono_memory_barrier ();
2500 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2502 gint64 tmp = *(volatile gint64 *)ptr;
2503 mono_memory_barrier ();
2508 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2510 volatile void *tmp = *(volatile void **)ptr;
2511 mono_memory_barrier ();
2512 return (void *) tmp;
2516 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2518 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2519 mono_memory_barrier ();
2520 return (MonoObject *) tmp;
2524 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2526 double tmp = *(volatile double *)ptr;
2527 mono_memory_barrier ();
2532 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2534 float tmp = *(volatile float *)ptr;
2535 mono_memory_barrier ();
2540 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2542 return InterlockedRead8 ((volatile gint8 *)ptr);
2546 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2548 return InterlockedRead16 ((volatile gint16 *)ptr);
2552 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2554 return InterlockedRead ((volatile gint32 *)ptr);
2558 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2560 #if SIZEOF_VOID_P == 4
2561 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2563 mono_interlocked_lock ();
2564 val = *(gint64*)ptr;
2565 mono_interlocked_unlock ();
2569 return InterlockedRead64 ((volatile gint64 *)ptr);
2573 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2575 return InterlockedReadPointer ((volatile gpointer *)ptr);
2579 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2583 #if SIZEOF_VOID_P == 4
2584 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2586 mono_interlocked_lock ();
2587 val = *(double*)ptr;
2588 mono_interlocked_unlock ();
2593 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2599 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2603 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2609 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2611 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2615 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2617 mono_memory_barrier ();
2618 *(volatile gint8 *)ptr = value;
2622 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2624 mono_memory_barrier ();
2625 *(volatile gint16 *)ptr = value;
2629 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2631 mono_memory_barrier ();
2632 *(volatile gint32 *)ptr = value;
2636 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2638 mono_memory_barrier ();
2639 *(volatile gint64 *)ptr = value;
2643 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2645 mono_memory_barrier ();
2646 *(volatile void **)ptr = value;
2650 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2652 mono_memory_barrier ();
2653 mono_gc_wbarrier_generic_store (ptr, value);
2657 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2659 mono_memory_barrier ();
2660 *(volatile double *)ptr = value;
2664 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2666 mono_memory_barrier ();
2667 *(volatile float *)ptr = value;
2671 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2673 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2677 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2679 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2683 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2685 InterlockedWrite ((volatile gint32 *)ptr, value);
2689 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2691 #if SIZEOF_VOID_P == 4
2692 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2693 mono_interlocked_lock ();
2694 *(gint64*)ptr = value;
2695 mono_interlocked_unlock ();
2700 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2704 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2706 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2710 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2714 #if SIZEOF_VOID_P == 4
2715 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2716 mono_interlocked_lock ();
2717 *(double*)ptr = value;
2718 mono_interlocked_unlock ();
2725 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2729 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2735 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2739 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2741 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2745 free_context (void *user_data)
2747 ContextStaticData *data = user_data;
2749 mono_threads_lock ();
2752 * There is no guarantee that, by the point this reference queue callback
2753 * has been invoked, the GC handle associated with the object will fail to
2754 * resolve as one might expect. So if we don't free and remove the GC
2755 * handle here, free_context_static_data_helper () could end up resolving
2756 * a GC handle to an actually-dead context which would contain a pointer
2757 * to an already-freed static data segment, resulting in a crash when
2760 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2762 mono_threads_unlock ();
2764 mono_gchandle_free (data->gc_handle);
2765 mono_free_static_data (data->static_data);
2770 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2772 mono_threads_lock ();
2774 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2777 contexts = g_hash_table_new (NULL, NULL);
2780 context_queue = mono_gc_reference_queue_new (free_context);
2782 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2783 g_hash_table_insert (contexts, gch, gch);
2786 * We use this intermediate structure to contain a duplicate pointer to
2787 * the static data because we can't rely on being able to resolve the GC
2788 * handle in the reference queue callback.
2790 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2791 data->gc_handle = GPOINTER_TO_UINT (gch);
2794 context_adjust_static_data (ctx);
2795 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2797 mono_threads_unlock ();
2799 mono_profiler_context_loaded (ctx);
2803 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2806 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2807 * cleanup in exceptional circumstances, we don't actually do any
2808 * cleanup work here. We instead do this via a reference queue.
2811 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2813 mono_profiler_context_unloaded (ctx);
2817 mono_thread_init_tls (void)
2819 MONO_FAST_TLS_INIT (tls_current_object);
2820 mono_native_tls_alloc (¤t_object_key, NULL);
2823 void mono_thread_init (MonoThreadStartCB start_cb,
2824 MonoThreadAttachCB attach_cb)
2826 mono_coop_mutex_init_recursive (&threads_mutex);
2828 mono_os_mutex_init_recursive(&interlocked_mutex);
2829 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2831 background_change_event = mono_w32event_create (TRUE, FALSE);
2832 g_assert(background_change_event != NULL);
2834 mono_init_static_data_info (&thread_static_info);
2835 mono_init_static_data_info (&context_static_info);
2837 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2839 mono_thread_start_cb = start_cb;
2840 mono_thread_attach_cb = attach_cb;
2842 /* Get a pseudo handle to the current process. This is just a
2843 * kludge so that wapi can build a process handle if needed.
2844 * As a pseudo handle is returned, we don't need to clean
2847 GetCurrentProcess ();
2850 void mono_thread_cleanup (void)
2852 #if !defined(RUN_IN_SUBTHREAD)
2853 /* The main thread must abandon any held mutexes (particularly
2854 * important for named mutexes as they are shared across
2855 * processes, see bug 74680.) This will happen when the
2856 * thread exits, but if it's not running in a subthread it
2857 * won't exit in time.
2859 mono_thread_info_set_exited (mono_thread_info_current ());
2863 /* This stuff needs more testing, it seems one of these
2864 * critical sections can be locked when mono_thread_cleanup is
2867 mono_coop_mutex_destroy (&threads_mutex);
2868 mono_os_mutex_destroy (&interlocked_mutex);
2869 mono_os_mutex_destroy (&delayed_free_table_mutex);
2870 mono_os_mutex_destroy (&small_id_mutex);
2871 CloseHandle (background_change_event);
2874 mono_native_tls_free (current_object_key);
2878 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2880 mono_thread_cleanup_fn = func;
2884 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2886 thread->internal_thread->manage_callback = func;
2890 static void print_tids (gpointer key, gpointer value, gpointer user)
2892 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2893 * sizeof(uint) and a cast to uint would overflow
2895 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2896 * print this as a pointer.
2898 g_message ("Waiting for: %p", key);
2903 HANDLE handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2904 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2909 wait_for_tids (struct wait_data *wait, guint32 timeout)
2913 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2916 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2919 if(ret==WAIT_FAILED) {
2920 /* See the comment in build_wait_tids() */
2921 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2925 for(i=0; i<wait->num; i++)
2926 mono_threads_close_thread_handle (wait->handles [i]);
2928 if (ret == WAIT_TIMEOUT)
2931 for(i=0; i<wait->num; i++) {
2932 gsize tid = wait->threads[i]->tid;
2935 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2936 * it can still run io-layer etc. code. So wait for it to really exit.
2937 * FIXME: This won't join threads which are not in the joinable_hash yet.
2939 mono_thread_join ((gpointer)tid);
2941 mono_threads_lock ();
2942 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2943 /* This thread must have been killed, because
2944 * it hasn't cleaned itself up. (It's just
2945 * possible that the thread exited before the
2946 * parent thread had a chance to store the
2947 * handle, and now there is another pointer to
2948 * the already-exited thread stored. In this
2949 * case, we'll just get two
2950 * mono_profiler_thread_end() calls for the
2954 mono_threads_unlock ();
2955 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2956 thread_cleanup (wait->threads[i]);
2958 mono_threads_unlock ();
2963 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2965 guint32 i, ret, count;
2967 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2969 /* Add the thread state change event, so it wakes up if a thread changes
2970 * to background mode.
2973 if (count < MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
2974 wait->handles [count] = background_change_event;
2979 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2982 if(ret==WAIT_FAILED) {
2983 /* See the comment in build_wait_tids() */
2984 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2988 for(i=0; i<wait->num; i++)
2989 mono_threads_close_thread_handle (wait->handles [i]);
2991 if (ret == WAIT_TIMEOUT)
2994 if (ret < wait->num) {
2995 gsize tid = wait->threads[ret]->tid;
2996 mono_threads_lock ();
2997 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2998 /* See comment in wait_for_tids about thread cleanup */
2999 mono_threads_unlock ();
3000 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
3001 thread_cleanup (wait->threads [ret]);
3003 mono_threads_unlock ();
3007 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3009 struct wait_data *wait=(struct wait_data *)user;
3011 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3013 MonoInternalThread *thread=(MonoInternalThread *)value;
3015 /* Ignore background threads, we abort them later */
3016 /* Do not lock here since it is not needed and the caller holds threads_lock */
3017 if (thread->state & ThreadState_Background) {
3018 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3019 return; /* just leave, ignore */
3022 if (mono_gc_is_finalizer_internal_thread (thread)) {
3023 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3027 if (thread == mono_thread_internal_current ()) {
3028 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3032 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3033 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3037 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3038 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3042 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3043 if (handle == NULL) {
3044 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3048 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3049 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3050 wait->handles[wait->num]=handle;
3051 wait->threads[wait->num]=thread;
3054 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3056 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3061 /* Just ignore the rest, we can't do anything with
3068 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3070 struct wait_data *wait=(struct wait_data *)user;
3071 MonoNativeThreadId self = mono_native_thread_id_get ();
3072 MonoInternalThread *thread = (MonoInternalThread *)value;
3075 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3078 /* The finalizer thread is not a background thread */
3079 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3080 && (thread->state & ThreadState_Background) != 0
3081 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3083 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3087 wait->handles[wait->num] = handle;
3088 wait->threads[wait->num] = thread;
3091 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3092 mono_thread_internal_abort (thread);
3096 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3097 && !mono_gc_is_finalizer_internal_thread (thread);
3101 * mono_threads_set_shutting_down:
3103 * Is called by a thread that wants to shut down Mono. If the runtime is already
3104 * shutting down, the calling thread is suspended/stopped, and this function never
3108 mono_threads_set_shutting_down (void)
3110 MonoInternalThread *current_thread = mono_thread_internal_current ();
3112 mono_threads_lock ();
3114 if (shutting_down) {
3115 mono_threads_unlock ();
3117 /* Make sure we're properly suspended/stopped */
3119 LOCK_THREAD (current_thread);
3121 if ((current_thread->state & ThreadState_SuspendRequested) ||
3122 (current_thread->state & ThreadState_AbortRequested) ||
3123 (current_thread->state & ThreadState_StopRequested)) {
3124 UNLOCK_THREAD (current_thread);
3125 mono_thread_execute_interruption ();
3127 current_thread->state |= ThreadState_Stopped;
3128 UNLOCK_THREAD (current_thread);
3131 /*since we're killing the thread, detach it.*/
3132 mono_thread_detach_internal (current_thread);
3134 /* Wake up other threads potentially waiting for us */
3135 mono_thread_info_exit ();
3137 shutting_down = TRUE;
3139 /* Not really a background state change, but this will
3140 * interrupt the main thread if it is waiting for all
3141 * the other threads.
3143 mono_w32event_set (background_change_event);
3145 mono_threads_unlock ();
3149 void mono_thread_manage (void)
3151 struct wait_data wait_data;
3152 struct wait_data *wait = &wait_data;
3154 memset (wait, 0, sizeof (struct wait_data));
3155 /* join each thread that's still running */
3156 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3158 mono_threads_lock ();
3160 THREAD_DEBUG (g_message("%s: No threads", __func__));
3161 mono_threads_unlock ();
3164 mono_threads_unlock ();
3167 mono_threads_lock ();
3168 if (shutting_down) {
3169 /* somebody else is shutting down */
3170 mono_threads_unlock ();
3173 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3174 mono_g_hash_table_foreach (threads, print_tids, NULL));
3176 mono_w32event_reset (background_change_event);
3178 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3179 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3180 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3181 mono_threads_unlock ();
3183 /* Something to wait for */
3184 wait_for_tids_or_state_change (wait, INFINITE);
3186 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3187 } while(wait->num>0);
3189 /* Mono is shutting down, so just wait for the end */
3190 if (!mono_runtime_try_shutdown ()) {
3191 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3192 mono_thread_suspend (mono_thread_internal_current ());
3193 mono_thread_execute_interruption ();
3197 * Remove everything but the finalizer thread and self.
3198 * Also abort all the background threads
3201 mono_threads_lock ();
3204 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3205 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3206 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3208 mono_threads_unlock ();
3210 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3212 /* Something to wait for */
3213 wait_for_tids (wait, INFINITE);
3215 } while (wait->num > 0);
3218 * give the subthreads a chance to really quit (this is mainly needed
3219 * to get correct user and system times from getrusage/wait/time(1)).
3220 * This could be removed if we avoid pthread_detach() and use pthread_join().
3222 mono_thread_info_yield ();
3226 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3228 MonoInternalThread *thread = (MonoInternalThread*)value;
3229 struct wait_data *wait = (struct wait_data*)user_data;
3233 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3235 * This needs no locking.
3237 if ((thread->state & ThreadState_Suspended) != 0 ||
3238 (thread->state & ThreadState_Stopped) != 0)
3241 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3242 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3246 wait->handles [wait->num] = handle;
3247 wait->threads [wait->num] = thread;
3253 * mono_thread_suspend_all_other_threads:
3255 * Suspend all managed threads except the finalizer thread and this thread. It is
3256 * not possible to resume them later.
3258 void mono_thread_suspend_all_other_threads (void)
3260 struct wait_data wait_data;
3261 struct wait_data *wait = &wait_data;
3263 MonoNativeThreadId self = mono_native_thread_id_get ();
3264 guint32 eventidx = 0;
3265 gboolean starting, finished;
3267 memset (wait, 0, sizeof (struct wait_data));
3269 * The other threads could be in an arbitrary state at this point, i.e.
3270 * they could be starting up, shutting down etc. This means that there could be
3271 * threads which are not even in the threads hash table yet.
3275 * First we set a barrier which will be checked by all threads before they
3276 * are added to the threads hash table, and they will exit if the flag is set.
3277 * This ensures that no threads could be added to the hash later.
3278 * We will use shutting_down as the barrier for now.
3280 g_assert (shutting_down);
3283 * We make multiple calls to WaitForMultipleObjects since:
3284 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3285 * - some threads could exit without becoming suspended
3290 * Make a copy of the hashtable since we can't do anything with
3291 * threads while threads_mutex is held.
3294 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3295 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3296 mono_threads_lock ();
3297 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3298 mono_threads_unlock ();
3301 /* Get the suspended events that we'll be waiting for */
3302 for (i = 0; i < wait->num; ++i) {
3303 MonoInternalThread *thread = wait->threads [i];
3305 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3306 || mono_gc_is_finalizer_internal_thread (thread)
3307 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3309 //mono_threads_close_thread_handle (wait->handles [i]);
3310 wait->threads [i] = NULL; /* ignore this thread in next loop */
3314 LOCK_THREAD (thread);
3316 if ((thread->state & ThreadState_Suspended) != 0 ||
3317 (thread->state & ThreadState_StopRequested) != 0 ||
3318 (thread->state & ThreadState_Stopped) != 0) {
3319 UNLOCK_THREAD (thread);
3320 mono_threads_close_thread_handle (wait->handles [i]);
3321 wait->threads [i] = NULL; /* ignore this thread in next loop */
3327 /* Convert abort requests into suspend requests */
3328 if ((thread->state & ThreadState_AbortRequested) != 0)
3329 thread->state &= ~ThreadState_AbortRequested;
3331 thread->state |= ThreadState_SuspendRequested;
3333 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3334 async_suspend_internal (thread, TRUE);
3336 if (eventidx <= 0) {
3338 * If there are threads which are starting up, we wait until they
3339 * are suspended when they try to register in the threads hash.
3340 * This is guaranteed to finish, since the threads which can create new
3341 * threads get suspended after a while.
3342 * FIXME: The finalizer thread can still create new threads.
3344 mono_threads_lock ();
3345 if (threads_starting_up)
3346 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3349 mono_threads_unlock ();
3351 mono_thread_info_sleep (100, NULL);
3359 MonoInternalThread *thread;
3360 MonoStackFrameInfo *frames;
3361 int nframes, max_frames;
3362 int nthreads, max_threads;
3363 MonoInternalThread **threads;
3364 } ThreadDumpUserData;
3366 static gboolean thread_dump_requested;
3368 /* This needs to be async safe */
3370 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3372 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3374 if (ud->nframes < ud->max_frames) {
3375 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3382 /* This needs to be async safe */
3383 static SuspendThreadResult
3384 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3386 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3387 MonoInternalThread *thread = user_data->thread;
3390 /* This no longer works with remote unwinding */
3391 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3392 mono_thread_internal_describe (thread, text);
3393 g_string_append (text, "\n");
3396 if (thread == mono_thread_internal_current ())
3397 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3399 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3401 return MonoResumeThread;
3405 int nthreads, max_threads;
3406 MonoInternalThread **threads;
3407 } CollectThreadsUserData;
3410 collect_thread (gpointer key, gpointer value, gpointer user)
3412 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3413 MonoInternalThread *thread = (MonoInternalThread *)value;
3415 if (ud->nthreads < ud->max_threads)
3416 ud->threads [ud->nthreads ++] = thread;
3420 * Collect running threads into the THREADS array.
3421 * THREADS should be an array allocated on the stack.
3424 collect_threads (MonoInternalThread **thread_array, int max_threads)
3426 CollectThreadsUserData ud;
3428 memset (&ud, 0, sizeof (ud));
3429 /* This array contains refs, but its on the stack, so its ok */
3430 ud.threads = thread_array;
3431 ud.max_threads = max_threads;
3433 mono_threads_lock ();
3434 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3435 mono_threads_unlock ();
3441 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3443 GString* text = g_string_new (0);
3445 GError *error = NULL;
3448 ud->thread = thread;
3451 /* Collect frames for the thread */
3452 if (thread == mono_thread_internal_current ()) {
3453 get_thread_dump (mono_thread_info_current (), ud);
3455 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3459 * Do all the non async-safe work outside of get_thread_dump.
3462 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3464 g_string_append_printf (text, "\n\"%s\"", name);
3467 else if (thread->threadpool_thread) {
3468 g_string_append (text, "\n\"<threadpool thread>\"");
3470 g_string_append (text, "\n\"<unnamed thread>\"");
3473 for (i = 0; i < ud->nframes; ++i) {
3474 MonoStackFrameInfo *frame = &ud->frames [i];
3475 MonoMethod *method = NULL;
3477 if (frame->type == FRAME_TYPE_MANAGED)
3478 method = mono_jit_info_get_method (frame->ji);
3481 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3482 g_string_append_printf (text, " %s\n", location);
3485 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3489 fprintf (stdout, "%s", text->str);
3491 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3492 OutputDebugStringA(text->str);
3495 g_string_free (text, TRUE);
3500 mono_threads_perform_thread_dump (void)
3502 ThreadDumpUserData ud;
3503 MonoInternalThread *thread_array [128];
3504 int tindex, nthreads;
3506 if (!thread_dump_requested)
3509 printf ("Full thread dump:\n");
3511 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3512 nthreads = collect_threads (thread_array, 128);
3514 memset (&ud, 0, sizeof (ud));
3515 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3516 ud.max_frames = 256;
3518 for (tindex = 0; tindex < nthreads; ++tindex)
3519 dump_thread (thread_array [tindex], &ud);
3523 thread_dump_requested = FALSE;
3526 /* Obtain the thread dump of all threads */
3528 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3531 ThreadDumpUserData ud;
3532 MonoInternalThread *thread_array [128];
3533 MonoDomain *domain = mono_domain_get ();
3534 MonoDebugSourceLocation *location;
3535 int tindex, nthreads;
3537 mono_error_init (error);
3539 *out_threads = NULL;
3540 *out_stack_frames = NULL;
3542 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3543 nthreads = collect_threads (thread_array, 128);
3545 memset (&ud, 0, sizeof (ud));
3546 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3547 ud.max_frames = 256;
3549 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3552 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3556 for (tindex = 0; tindex < nthreads; ++tindex) {
3557 MonoInternalThread *thread = thread_array [tindex];
3558 MonoArray *thread_frames;
3564 /* Collect frames for the thread */
3565 if (thread == mono_thread_internal_current ()) {
3566 get_thread_dump (mono_thread_info_current (), &ud);
3568 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3571 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3573 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3576 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3578 for (i = 0; i < ud.nframes; ++i) {
3579 MonoStackFrameInfo *frame = &ud.frames [i];
3580 MonoMethod *method = NULL;
3581 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3585 sf->native_offset = frame->native_offset;
3587 if (frame->type == FRAME_TYPE_MANAGED)
3588 method = mono_jit_info_get_method (frame->ji);
3591 sf->method_address = (gsize) frame->ji->code_start;
3593 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3596 MONO_OBJECT_SETREF (sf, method, rm);
3598 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3600 sf->il_offset = location->il_offset;
3602 if (location && location->source_file) {
3603 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3604 sf->line = location->row;
3605 sf->column = location->column;
3607 mono_debug_free_source_location (location);
3612 mono_array_setref (thread_frames, i, sf);
3618 return is_ok (error);
3622 * mono_threads_request_thread_dump:
3624 * Ask all threads except the current to print their stacktrace to stdout.
3627 mono_threads_request_thread_dump (void)
3629 /*The new thread dump code runs out of the finalizer thread. */
3630 thread_dump_requested = TRUE;
3631 mono_gc_finalize_notify ();
3636 gint allocated; /* +1 so that refs [allocated] == NULL */
3640 typedef struct ref_stack RefStack;
3643 ref_stack_new (gint initial_size)
3647 initial_size = MAX (initial_size, 16) + 1;
3648 rs = g_new0 (RefStack, 1);
3649 rs->refs = g_new0 (gpointer, initial_size);
3650 rs->allocated = initial_size;
3655 ref_stack_destroy (gpointer ptr)
3657 RefStack *rs = (RefStack *)ptr;
3666 ref_stack_push (RefStack *rs, gpointer ptr)
3668 g_assert (rs != NULL);
3670 if (rs->bottom >= rs->allocated) {
3671 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3672 rs->allocated <<= 1;
3673 rs->refs [rs->allocated] = NULL;
3675 rs->refs [rs->bottom++] = ptr;
3679 ref_stack_pop (RefStack *rs)
3681 if (rs == NULL || rs->bottom == 0)
3685 rs->refs [rs->bottom] = NULL;
3689 ref_stack_find (RefStack *rs, gpointer ptr)
3696 for (refs = rs->refs; refs && *refs; refs++) {
3704 * mono_thread_push_appdomain_ref:
3706 * Register that the current thread may have references to objects in domain
3707 * @domain on its stack. Each call to this function should be paired with a
3708 * call to pop_appdomain_ref.
3711 mono_thread_push_appdomain_ref (MonoDomain *domain)
3713 MonoInternalThread *thread = mono_thread_internal_current ();
3716 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3717 SPIN_LOCK (thread->lock_thread_id);
3718 if (thread->appdomain_refs == NULL)
3719 thread->appdomain_refs = ref_stack_new (16);
3720 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3721 SPIN_UNLOCK (thread->lock_thread_id);
3726 mono_thread_pop_appdomain_ref (void)
3728 MonoInternalThread *thread = mono_thread_internal_current ();
3731 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3732 SPIN_LOCK (thread->lock_thread_id);
3733 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3734 SPIN_UNLOCK (thread->lock_thread_id);
3739 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3742 SPIN_LOCK (thread->lock_thread_id);
3743 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3744 SPIN_UNLOCK (thread->lock_thread_id);
3749 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3751 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3754 typedef struct abort_appdomain_data {
3755 struct wait_data wait;
3757 } abort_appdomain_data;
3760 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3762 MonoInternalThread *thread = (MonoInternalThread*)value;
3763 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3764 MonoDomain *domain = data->domain;
3766 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3767 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3769 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3770 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3773 data->wait.handles [data->wait.num] = handle;
3774 data->wait.threads [data->wait.num] = thread;
3777 /* Just ignore the rest, we can't do anything with
3785 * mono_threads_abort_appdomain_threads:
3787 * Abort threads which has references to the given appdomain.
3790 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3792 #ifdef __native_client__
3796 abort_appdomain_data user_data;
3798 int orig_timeout = timeout;
3801 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3803 start_time = mono_msec_ticks ();
3805 mono_threads_lock ();
3807 user_data.domain = domain;
3808 user_data.wait.num = 0;
3809 /* This shouldn't take any locks */
3810 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3811 mono_threads_unlock ();
3813 if (user_data.wait.num > 0) {
3814 /* Abort the threads outside the threads lock */
3815 for (i = 0; i < user_data.wait.num; ++i)
3816 mono_thread_internal_abort (user_data.wait.threads [i]);
3819 * We should wait for the threads either to abort, or to leave the
3820 * domain. We can't do the latter, so we wait with a timeout.
3822 wait_for_tids (&user_data.wait, 100);
3825 /* Update remaining time */
3826 timeout -= mono_msec_ticks () - start_time;
3827 start_time = mono_msec_ticks ();
3829 if (orig_timeout != -1 && timeout < 0)
3832 while (user_data.wait.num > 0);
3834 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3840 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3842 MonoInternalThread *thread = (MonoInternalThread*)value;
3843 MonoDomain *domain = (MonoDomain*)user_data;
3846 /* No locking needed here */
3847 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3849 if (thread->cached_culture_info) {
3850 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3851 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3852 if (obj && obj->vtable->domain == domain)
3853 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3859 * mono_threads_clear_cached_culture:
3861 * Clear the cached_current_culture from all threads if it is in the
3865 mono_threads_clear_cached_culture (MonoDomain *domain)
3867 mono_threads_lock ();
3868 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3869 mono_threads_unlock ();
3873 * mono_thread_get_undeniable_exception:
3875 * Return an exception which needs to be raised when leaving a catch clause.
3876 * This is used for undeniable exception propagation.
3879 mono_thread_get_undeniable_exception (void)
3881 MonoInternalThread *thread = mono_thread_internal_current ();
3883 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3885 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3886 * exception if the thread no longer references a dying appdomain.
3888 thread->abort_exc->trace_ips = NULL;
3889 thread->abort_exc->stack_trace = NULL;
3890 return thread->abort_exc;
3896 #if MONO_SMALL_CONFIG
3897 #define NUM_STATIC_DATA_IDX 4
3898 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3902 #define NUM_STATIC_DATA_IDX 8
3903 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3904 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3908 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3909 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3912 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3914 gpointer *static_data = (gpointer *)addr;
3916 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3917 void **ptr = (void **)static_data [i];
3922 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3923 void **p = ptr + idx;
3926 mark_func ((MonoObject**)p, gc_data);
3932 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3934 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3938 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3940 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3944 * mono_alloc_static_data
3946 * Allocate memory blocks for storing threads or context static data
3949 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3951 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3954 gpointer* static_data = *static_data_ptr;
3956 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3957 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3959 if (mono_gc_user_markers_supported ()) {
3960 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3961 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3963 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3964 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3967 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3968 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3969 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3970 *static_data_ptr = static_data;
3971 static_data [0] = static_data;
3974 for (i = 1; i <= idx; ++i) {
3975 if (static_data [i])
3978 if (mono_gc_user_markers_supported ())
3979 static_data [i] = g_malloc0 (static_data_size [i]);
3981 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3982 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3983 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3988 mono_free_static_data (gpointer* static_data)
3991 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3992 gpointer p = static_data [i];
3996 * At this point, the static data pointer array is still registered with the
3997 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3998 * data. Freeing the individual arrays without first nulling their slots
3999 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4000 * such an already freed array. See bug #13813.
4002 static_data [i] = NULL;
4003 mono_memory_write_barrier ();
4004 if (mono_gc_user_markers_supported ())
4007 mono_gc_free_fixed (p);
4009 mono_gc_free_fixed (static_data);
4013 * mono_init_static_data_info
4015 * Initializes static data counters
4017 static void mono_init_static_data_info (StaticDataInfo *static_data)
4019 static_data->idx = 0;
4020 static_data->offset = 0;
4021 static_data->freelist = NULL;
4025 * mono_alloc_static_data_slot
4027 * Generates an offset for static data. static_data contains the counters
4028 * used to generate it.
4031 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4033 if (!static_data->idx && !static_data->offset) {
4035 * we use the first chunk of the first allocation also as
4036 * an array for the rest of the data
4038 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4040 static_data->offset += align - 1;
4041 static_data->offset &= ~(align - 1);
4042 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4043 static_data->idx ++;
4044 g_assert (size <= static_data_size [static_data->idx]);
4045 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4046 static_data->offset = 0;
4048 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4049 static_data->offset += size;
4054 * LOCKING: requires that threads_mutex is held
4057 context_adjust_static_data (MonoAppContext *ctx)
4059 if (context_static_info.offset || context_static_info.idx > 0) {
4060 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4061 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4062 ctx->data->static_data = ctx->static_data;
4067 * LOCKING: requires that threads_mutex is held
4070 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4072 MonoInternalThread *thread = (MonoInternalThread *)value;
4073 guint32 offset = GPOINTER_TO_UINT (user);
4075 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4079 * LOCKING: requires that threads_mutex is held
4082 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4084 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4089 guint32 offset = GPOINTER_TO_UINT (user);
4090 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4091 ctx->data->static_data = ctx->static_data;
4094 static StaticDataFreeList*
4095 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4097 StaticDataFreeList* prev = NULL;
4098 StaticDataFreeList* tmp = static_data->freelist;
4100 if (tmp->size == size) {
4102 prev->next = tmp->next;
4104 static_data->freelist = tmp->next;
4113 #if SIZEOF_VOID_P == 4
4120 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4122 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4124 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4125 MonoBitSet *rb = sets [idx];
4126 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4127 offset /= sizeof (uintptr_t);
4128 /* offset is now the bitmap offset */
4129 for (int i = 0; i < numbits; ++i) {
4130 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4131 mono_bitset_set_fast (rb, offset + i);
4136 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4138 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4139 MonoBitSet *rb = sets [idx];
4140 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4141 offset /= sizeof (uintptr_t);
4142 /* offset is now the bitmap offset */
4143 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4144 mono_bitset_clear_fast (rb, offset + i);
4148 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4150 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4152 StaticDataInfo *info;
4155 if (static_type == SPECIAL_STATIC_THREAD) {
4156 info = &thread_static_info;
4157 sets = thread_reference_bitmaps;
4159 info = &context_static_info;
4160 sets = context_reference_bitmaps;
4163 mono_threads_lock ();
4165 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4169 offset = item->offset;
4172 offset = mono_alloc_static_data_slot (info, size, align);
4175 update_reference_bitmap (sets, offset, bitmap, numbits);
4177 if (static_type == SPECIAL_STATIC_THREAD) {
4178 /* This can be called during startup */
4179 if (threads != NULL)
4180 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4182 if (contexts != NULL)
4183 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4185 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4188 mono_threads_unlock ();
4194 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4196 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4198 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4199 return get_thread_static_data (thread, offset);
4201 return get_context_static_data (thread->current_appcontext, offset);
4206 mono_get_special_static_data (guint32 offset)
4208 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4217 * LOCKING: requires that threads_mutex is held
4220 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4222 MonoInternalThread *thread = (MonoInternalThread *)value;
4223 OffsetSize *data = (OffsetSize *)user;
4224 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4225 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4228 if (!thread->static_data || !thread->static_data [idx])
4230 ptr = ((char*) thread->static_data [idx]) + off;
4231 mono_gc_bzero_atomic (ptr, data->size);
4235 * LOCKING: requires that threads_mutex is held
4238 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4240 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
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 (!ctx->static_data || !ctx->static_data [idx])
4253 ptr = ((char*) ctx->static_data [idx]) + off;
4254 mono_gc_bzero_atomic (ptr, data->size);
4258 do_free_special_slot (guint32 offset, guint32 size)
4260 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4262 StaticDataInfo *info;
4264 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4265 info = &thread_static_info;
4266 sets = thread_reference_bitmaps;
4268 info = &context_static_info;
4269 sets = context_reference_bitmaps;
4272 guint32 data_offset = offset;
4273 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4274 OffsetSize data = { data_offset, size };
4276 clear_reference_bitmap (sets, data.offset, data.size);
4278 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4279 if (threads != NULL)
4280 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4282 if (contexts != NULL)
4283 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4286 if (!mono_runtime_is_shutting_down ()) {
4287 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4289 item->offset = offset;
4292 item->next = info->freelist;
4293 info->freelist = item;
4298 do_free_special (gpointer key, gpointer value, gpointer data)
4300 MonoClassField *field = (MonoClassField *)key;
4301 guint32 offset = GPOINTER_TO_UINT (value);
4304 size = mono_type_size (field->type, &align);
4305 do_free_special_slot (offset, size);
4309 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4311 mono_threads_lock ();
4313 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4315 mono_threads_unlock ();
4319 static void CALLBACK dummy_apc (ULONG_PTR param)
4325 * mono_thread_execute_interruption
4327 * Performs the operation that the requested thread state requires (abort,
4330 static MonoException*
4331 mono_thread_execute_interruption (void)
4333 MonoInternalThread *thread = mono_thread_internal_current ();
4334 MonoThread *sys_thread = mono_thread_current ();
4336 LOCK_THREAD (thread);
4338 /* MonoThread::interruption_requested can only be changed with atomics */
4339 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4340 /* this will consume pending APC calls */
4342 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4344 InterlockedDecrement (&thread_interruption_requested);
4346 /* Clear the interrupted flag of the thread so it can wait again */
4347 mono_thread_info_clear_self_interrupt ();
4350 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4351 if (sys_thread->pending_exception) {
4354 exc = sys_thread->pending_exception;
4355 sys_thread->pending_exception = NULL;
4357 UNLOCK_THREAD (thread);
4359 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4360 UNLOCK_THREAD (thread);
4361 g_assert (sys_thread->pending_exception == NULL);
4362 if (thread->abort_exc == NULL) {
4364 * This might be racy, but it has to be called outside the lock
4365 * since it calls managed code.
4367 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4369 return thread->abort_exc;
4371 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4372 /* calls UNLOCK_THREAD (thread) */
4373 self_suspend_internal ();
4376 else if ((thread->state & ThreadState_StopRequested) != 0) {
4377 /* FIXME: do this through the JIT? */
4379 UNLOCK_THREAD (thread);
4381 mono_thread_exit ();
4383 } else if (thread->thread_interrupt_requested) {
4385 thread->thread_interrupt_requested = FALSE;
4386 UNLOCK_THREAD (thread);
4388 return(mono_get_exception_thread_interrupted ());
4391 UNLOCK_THREAD (thread);
4397 * mono_thread_request_interruption
4399 * A signal handler can call this method to request the interruption of a
4400 * thread. The result of the interruption will depend on the current state of
4401 * the thread. If the result is an exception that needs to be throw, it is
4402 * provided as return value.
4405 mono_thread_request_interruption (gboolean running_managed)
4407 MonoInternalThread *thread = mono_thread_internal_current ();
4409 /* The thread may already be stopping */
4414 if (thread->interrupt_on_stop &&
4415 thread->state & ThreadState_StopRequested &&
4416 thread->state & ThreadState_Background)
4419 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4421 InterlockedIncrement (&thread_interruption_requested);
4423 if (!running_managed || is_running_protected_wrapper ()) {
4424 /* Can't stop while in unmanaged code. Increase the global interruption
4425 request count. When exiting the unmanaged method the count will be
4426 checked and the thread will be interrupted. */
4428 /* this will awake the thread if it is in WaitForSingleObject
4430 /* Our implementation of this function ignores the func argument */
4432 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4434 mono_thread_info_self_interrupt ();
4439 return mono_thread_execute_interruption ();
4443 /*This function should be called by a thread after it has exited all of
4444 * its handle blocks at interruption time.*/
4446 mono_thread_resume_interruption (void)
4448 MonoInternalThread *thread = mono_thread_internal_current ();
4449 gboolean still_aborting;
4451 /* The thread may already be stopping */
4455 LOCK_THREAD (thread);
4456 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4457 UNLOCK_THREAD (thread);
4459 /*This can happen if the protected block called Thread::ResetAbort*/
4460 if (!still_aborting)
4463 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4465 InterlockedIncrement (&thread_interruption_requested);
4467 mono_thread_info_self_interrupt ();
4469 return mono_thread_execute_interruption ();
4472 gboolean mono_thread_interruption_requested ()
4474 if (thread_interruption_requested) {
4475 MonoInternalThread *thread = mono_thread_internal_current ();
4476 /* The thread may already be stopping */
4478 return (thread->interruption_requested);
4483 static MonoException*
4484 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4486 MonoInternalThread *thread = mono_thread_internal_current ();
4488 /* The thread may already be stopping */
4492 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4493 MonoException* exc = mono_thread_execute_interruption ();
4501 * Performs the interruption of the current thread, if one has been requested,
4502 * and the thread is not running a protected wrapper.
4503 * Return the exception which needs to be thrown, if any.
4506 mono_thread_interruption_checkpoint (void)
4508 return mono_thread_interruption_checkpoint_request (FALSE);
4512 * Performs the interruption of the current thread, if one has been requested.
4513 * Return the exception which needs to be thrown, if any.
4516 mono_thread_force_interruption_checkpoint_noraise (void)
4518 return mono_thread_interruption_checkpoint_request (TRUE);
4522 * mono_set_pending_exception:
4524 * Set the pending exception of the current thread to EXC.
4525 * The exception will be thrown when execution returns to managed code.
4528 mono_set_pending_exception (MonoException *exc)
4530 MonoThread *thread = mono_thread_current ();
4532 /* The thread may already be stopping */
4536 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4538 mono_thread_request_interruption (FALSE);
4542 * mono_thread_interruption_request_flag:
4544 * Returns the address of a flag that will be non-zero if an interruption has
4545 * been requested for a thread. The thread to interrupt may not be the current
4546 * thread, so an additional call to mono_thread_interruption_requested() or
4547 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4550 gint32* mono_thread_interruption_request_flag ()
4552 return &thread_interruption_requested;
4556 mono_thread_init_apartment_state (void)
4559 MonoInternalThread* thread = mono_thread_internal_current ();
4561 /* Positive return value indicates success, either
4562 * S_OK if this is first CoInitialize call, or
4563 * S_FALSE if CoInitialize already called, but with same
4564 * threading model. A negative value indicates failure,
4565 * probably due to trying to change the threading model.
4567 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4568 ? COINIT_APARTMENTTHREADED
4569 : COINIT_MULTITHREADED) < 0) {
4570 thread->apartment_state = ThreadApartmentState_Unknown;
4576 mono_thread_cleanup_apartment_state (void)
4579 MonoInternalThread* thread = mono_thread_internal_current ();
4581 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4588 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4590 LOCK_THREAD (thread);
4591 thread->state |= state;
4592 UNLOCK_THREAD (thread);
4596 * mono_thread_test_and_set_state:
4598 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4600 * Returns TRUE is @set was OR'd in.
4603 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4605 LOCK_THREAD (thread);
4607 if ((thread->state & test) != 0) {
4608 UNLOCK_THREAD (thread);
4612 thread->state |= set;
4613 UNLOCK_THREAD (thread);
4619 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4621 LOCK_THREAD (thread);
4622 thread->state &= ~state;
4623 UNLOCK_THREAD (thread);
4627 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4629 gboolean ret = FALSE;
4631 LOCK_THREAD (thread);
4633 if ((thread->state & test) != 0) {
4637 UNLOCK_THREAD (thread);
4642 static gboolean has_tls_get = FALSE;
4645 mono_runtime_set_has_tls_get (gboolean val)
4651 mono_runtime_has_tls_get (void)
4657 self_interrupt_thread (void *_unused)
4659 MonoThreadInfo *info = mono_thread_info_current ();
4660 MonoException *exc = mono_thread_execute_interruption ();
4661 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4662 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. */
4663 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4667 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4671 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4675 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4677 MonoJitInfo **dest = (MonoJitInfo **)data;
4683 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4685 MonoJitInfo *ji = NULL;
4690 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4691 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4692 * where we hold runtime locks.
4694 if (!mono_threads_is_coop_enabled ())
4695 mono_thread_info_set_is_async_context (TRUE);
4696 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4697 if (!mono_threads_is_coop_enabled ())
4698 mono_thread_info_set_is_async_context (FALSE);
4703 MonoInternalThread *thread;
4704 gboolean install_async_abort;
4705 MonoThreadInfoInterruptToken *interrupt_token;
4708 static SuspendThreadResult
4709 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4711 AbortThreadData *data = (AbortThreadData *)ud;
4712 MonoInternalThread *thread = data->thread;
4713 MonoJitInfo *ji = NULL;
4714 gboolean protected_wrapper;
4715 gboolean running_managed;
4717 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4718 return MonoResumeThread;
4721 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4722 The protected block code will give them a chance when appropriate.
4724 if (thread->abort_protected_block_count)
4725 return MonoResumeThread;
4727 /*someone is already interrupting it*/
4728 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4729 return MonoResumeThread;
4731 InterlockedIncrement (&thread_interruption_requested);
4733 ji = mono_thread_info_get_last_managed (info);
4734 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4735 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4737 if (!protected_wrapper && running_managed) {
4738 /*We are in managed code*/
4739 /*Set the thread to call */
4740 if (data->install_async_abort)
4741 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4742 return MonoResumeThread;
4745 * This will cause waits to be broken.
4746 * It will also prevent the thread from entering a wait, so if the thread returns
4747 * from the wait before it receives the abort signal, it will just spin in the wait
4748 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4751 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4753 return MonoResumeThread;
4758 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4760 AbortThreadData data;
4762 g_assert (thread != mono_thread_internal_current ());
4764 data.thread = thread;
4765 data.install_async_abort = install_async_abort;
4766 data.interrupt_token = NULL;
4768 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4769 if (data.interrupt_token)
4770 mono_thread_info_finish_interrupt (data.interrupt_token);
4771 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4775 self_abort_internal (MonoError *error)
4779 mono_error_init (error);
4781 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4782 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4785 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.
4787 exc = mono_thread_request_interruption (TRUE);
4789 mono_error_set_exception_instance (error, exc);
4791 mono_thread_info_self_interrupt ();
4795 MonoInternalThread *thread;
4797 MonoThreadInfoInterruptToken *interrupt_token;
4798 } SuspendThreadData;
4800 static SuspendThreadResult
4801 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4803 SuspendThreadData *data = (SuspendThreadData *)ud;
4804 MonoInternalThread *thread = data->thread;
4805 MonoJitInfo *ji = NULL;
4806 gboolean protected_wrapper;
4807 gboolean running_managed;
4809 ji = mono_thread_info_get_last_managed (info);
4810 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4811 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4813 if (running_managed && !protected_wrapper) {
4814 thread->state &= ~ThreadState_SuspendRequested;
4815 thread->state |= ThreadState_Suspended;
4816 return KeepSuspended;
4818 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4819 InterlockedIncrement (&thread_interruption_requested);
4820 if (data->interrupt)
4821 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4823 return MonoResumeThread;
4827 /* LOCKING: called with @thread synch_cs held, and releases it */
4829 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4831 SuspendThreadData data;
4833 g_assert (thread != mono_thread_internal_current ());
4835 data.thread = thread;
4836 data.interrupt = interrupt;
4837 data.interrupt_token = NULL;
4839 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4840 if (data.interrupt_token)
4841 mono_thread_info_finish_interrupt (data.interrupt_token);
4843 UNLOCK_THREAD (thread);
4846 /* LOCKING: called with @thread synch_cs held, and releases it */
4848 self_suspend_internal (void)
4850 MonoInternalThread *thread;
4852 thread = mono_thread_internal_current ();
4854 mono_thread_info_begin_self_suspend ();
4855 thread->state &= ~ThreadState_SuspendRequested;
4856 thread->state |= ThreadState_Suspended;
4858 UNLOCK_THREAD (thread);
4860 mono_thread_info_end_self_suspend ();
4864 * mono_thread_is_foreign:
4865 * @thread: the thread to query
4867 * This function allows one to determine if a thread was created by the mono runtime and has
4868 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4870 * Returns: TRUE if @thread was not created by the runtime.
4873 mono_thread_is_foreign (MonoThread *thread)
4875 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4876 return info->runtime_thread == FALSE;
4880 * mono_add_joinable_thread:
4882 * Add TID to the list of joinable threads.
4883 * LOCKING: Acquires the threads lock.
4886 mono_threads_add_joinable_thread (gpointer tid)
4890 * We cannot detach from threads because it causes problems like
4891 * 2fd16f60/r114307. So we collect them and join them when
4892 * we have time (in he finalizer thread).
4894 joinable_threads_lock ();
4895 if (!joinable_threads)
4896 joinable_threads = g_hash_table_new (NULL, NULL);
4897 g_hash_table_insert (joinable_threads, tid, tid);
4898 joinable_thread_count ++;
4899 joinable_threads_unlock ();
4901 mono_gc_finalize_notify ();
4906 * mono_threads_join_threads:
4908 * Join all joinable threads. This is called from the finalizer thread.
4909 * LOCKING: Acquires the threads lock.
4912 mono_threads_join_threads (void)
4915 GHashTableIter iter;
4922 if (!joinable_thread_count)
4926 joinable_threads_lock ();
4928 if (g_hash_table_size (joinable_threads)) {
4929 g_hash_table_iter_init (&iter, joinable_threads);
4930 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4931 thread = (pthread_t)tid;
4932 g_hash_table_remove (joinable_threads, key);
4933 joinable_thread_count --;
4936 joinable_threads_unlock ();
4938 if (thread != pthread_self ()) {
4940 /* This shouldn't block */
4941 pthread_join (thread, NULL);
4954 * Wait for thread TID to exit.
4955 * LOCKING: Acquires the threads lock.
4958 mono_thread_join (gpointer tid)
4962 gboolean found = FALSE;
4964 joinable_threads_lock ();
4965 if (!joinable_threads)
4966 joinable_threads = g_hash_table_new (NULL, NULL);
4967 if (g_hash_table_lookup (joinable_threads, tid)) {
4968 g_hash_table_remove (joinable_threads, tid);
4969 joinable_thread_count --;
4972 joinable_threads_unlock ();
4975 thread = (pthread_t)tid;
4977 pthread_join (thread, NULL);
4983 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4985 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4986 mono_thread_interruption_checkpoint ();
4990 mono_thread_internal_unhandled_exception (MonoObject* exc)
4992 MonoClass *klass = exc->vtable->klass;
4993 if (is_threadabort_exception (klass)) {
4994 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4995 } else if (!is_appdomainunloaded_exception (klass)
4996 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4997 mono_unhandled_exception (exc);
4998 if (mono_environment_exitcode_get () == 1) {
4999 mono_environment_exitcode_set (255);
5000 mono_invoke_unhandled_exception_hook (exc);
5001 g_assert_not_reached ();
5007 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5010 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5011 mono_error_set_pending_exception (&error);
5015 * mono_threads_attach_coop: called by native->managed wrappers
5019 * - @return: the original domain which needs to be restored, or NULL.
5022 * - @dummy: contains the original domain
5023 * - @return: a cookie containing current MonoThreadInfo*.
5026 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5029 gboolean fresh_thread = FALSE;
5032 /* Happens when called from AOTed code which is only used in the root domain. */
5033 domain = mono_get_root_domain ();
5038 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5039 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5040 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5041 * we're only responsible for making the cookie. */
5042 if (mono_threads_is_coop_enabled ()) {
5043 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5044 fresh_thread = !info || !mono_thread_info_is_live (info);
5047 if (!mono_thread_internal_current ()) {
5048 mono_thread_attach_full (domain, FALSE);
5051 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5054 orig = mono_domain_get ();
5056 mono_domain_set (domain, TRUE);
5058 if (!mono_threads_is_coop_enabled ())
5059 return orig != domain ? orig : NULL;
5063 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5064 * return the right cookie. */
5065 return mono_threads_enter_gc_unsafe_region_cookie ();
5068 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5069 return mono_threads_enter_gc_unsafe_region (dummy);
5074 * mono_threads_detach_coop: called by native->managed wrappers
5077 * - @cookie: the original domain which needs to be restored, or NULL.
5081 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5082 * - @dummy: contains the original domain
5085 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5087 MonoDomain *domain, *orig;
5089 if (!mono_threads_is_coop_enabled ()) {
5090 orig = (MonoDomain*) cookie;
5092 mono_domain_set (orig, TRUE);
5094 orig = (MonoDomain*) *dummy;
5096 domain = mono_domain_get ();
5099 /* it won't do anything if cookie is NULL
5100 * thread state RUNNING -> (RUNNING|BLOCKING) */
5101 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5103 if (orig != domain) {
5105 mono_domain_unset ();
5107 mono_domain_set (orig, TRUE);
5113 mono_threads_begin_abort_protected_block (void)
5115 MonoInternalThread *thread;
5117 thread = mono_thread_internal_current ();
5118 ++thread->abort_protected_block_count;
5119 mono_memory_barrier ();
5123 mono_threads_end_abort_protected_block (void)
5125 MonoInternalThread *thread;
5127 thread = mono_thread_internal_current ();
5129 mono_memory_barrier ();
5130 --thread->abort_protected_block_count;
5134 mono_thread_try_resume_interruption (void)
5136 MonoInternalThread *thread;
5138 thread = mono_thread_internal_current ();
5139 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5142 return mono_thread_resume_interruption ();
5145 /* Returns TRUE if the current thread is ready to be interrupted. */
5147 mono_threads_is_ready_to_be_interrupted (void)
5149 MonoInternalThread *thread;
5151 thread = mono_thread_internal_current ();
5152 LOCK_THREAD (thread);
5153 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5154 UNLOCK_THREAD (thread);
5158 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5159 UNLOCK_THREAD (thread);
5163 UNLOCK_THREAD (thread);
5168 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5170 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5172 if (internal->thread_info) {
5173 g_string_append (text, ", state : ");
5174 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5177 if (internal->owned_mutexes) {
5180 g_string_append (text, ", owns : [");
5181 for (i = 0; i < internal->owned_mutexes->len; i++)
5182 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5183 g_string_append (text, "]");
5188 mono_thread_internal_is_current (MonoInternalThread *internal)
5190 g_assert (internal);
5191 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));