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)
20 #if defined(__OpenBSD__) || defined(__FreeBSD__)
22 #include <pthread_np.h>
25 #include <mono/metadata/object.h>
26 #include <mono/metadata/domain-internals.h>
27 #include <mono/metadata/profiler-private.h>
28 #include <mono/metadata/threads.h>
29 #include <mono/metadata/threadpool.h>
30 #include <mono/metadata/threads-types.h>
31 #include <mono/metadata/exception.h>
32 #include <mono/metadata/environment.h>
33 #include <mono/metadata/monitor.h>
34 #include <mono/metadata/gc-internal.h>
35 #include <mono/metadata/marshal.h>
36 #include <mono/metadata/runtime.h>
37 #include <mono/io-layer/io-layer.h>
39 #include <mono/io-layer/threads.h>
41 #include <mono/metadata/object-internals.h>
42 #include <mono/metadata/mono-debug-debugger.h>
43 #include <mono/utils/mono-compiler.h>
44 #include <mono/utils/mono-mmap.h>
45 #include <mono/utils/mono-membar.h>
46 #include <mono/utils/mono-time.h>
47 #include <mono/utils/mono-threads.h>
48 #include <mono/utils/hazard-pointer.h>
49 #include <mono/utils/mono-tls.h>
50 #include <mono/utils/atomic.h>
52 #include <mono/metadata/gc-internal.h>
54 #ifdef PLATFORM_ANDROID
57 extern int tkill (pid_t tid, int signal);
60 #if defined(PLATFORM_MACOSX) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
61 void *pthread_get_stackaddr_np(pthread_t);
62 size_t pthread_get_stacksize_np(pthread_t);
65 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
66 #define THREAD_DEBUG(a)
67 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
68 #define THREAD_WAIT_DEBUG(a)
69 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
70 #define LIBGC_DEBUG(a)
72 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
73 #define SPIN_LOCK(i) do { \
74 if (SPIN_TRYLOCK (i)) \
78 #define SPIN_UNLOCK(i) i = 0
80 /* Provide this for systems with glib < 2.6 */
81 #ifndef G_GSIZE_FORMAT
82 # if GLIB_SIZEOF_LONG == 8
83 # define G_GSIZE_FORMAT "lu"
85 # define G_GSIZE_FORMAT "u"
91 guint32 (*func)(void *);
107 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
108 struct _MonoThreadDomainTls {
109 MonoThreadDomainTls *next;
117 MonoThreadDomainTls *freelist;
120 /* Number of cached culture objects in the MonoThread->cached_culture_info array
121 * (per-type): we use the first NUM entries for CultureInfo and the last for
122 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
124 #define NUM_CACHED_CULTURES 4
125 #define CULTURES_START_IDX 0
126 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
128 /* Controls access to the 'threads' hash table */
129 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
130 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
131 static CRITICAL_SECTION threads_mutex;
133 /* Controls access to context static data */
134 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
135 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
136 static CRITICAL_SECTION contexts_mutex;
138 /* Holds current status of static data heap */
139 static StaticDataInfo thread_static_info;
140 static StaticDataInfo context_static_info;
142 /* The hash of existing threads (key is thread ID, value is
143 * MonoInternalThread*) that need joining before exit
145 static MonoGHashTable *threads=NULL;
148 * Threads which are starting up and they are not in the 'threads' hash yet.
149 * When handle_store 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 /* Maps a MonoThread to its start argument */
155 /* Protected by mono_threads_lock () */
156 static MonoGHashTable *thread_start_args = NULL;
158 /* The TLS key that holds the MonoObject assigned to each thread */
159 static MonoNativeTlsKey current_object_key;
161 #ifdef MONO_HAVE_FAST_TLS
162 /* we need to use both the Tls* functions and __thread because
163 * the gc needs to see all the threads
165 MONO_FAST_TLS_DECLARE(tls_current_object);
166 #define SET_CURRENT_OBJECT(x) do { \
167 MONO_FAST_TLS_SET (tls_current_object, x); \
168 mono_native_tls_set_value (current_object_key, x); \
170 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
172 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
173 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
176 /* function called at thread start */
177 static MonoThreadStartCB mono_thread_start_cb = NULL;
179 /* function called at thread attach */
180 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
182 /* function called at thread cleanup */
183 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
185 /* function called to notify the runtime about a pending exception on the current thread */
186 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
188 /* The default stack size for each thread */
189 static guint32 default_stacksize = 0;
190 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
192 static void thread_adjust_static_data (MonoInternalThread *thread);
193 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
194 static void mono_init_static_data_info (StaticDataInfo *static_data);
195 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
196 static gboolean mono_thread_resume (MonoInternalThread* thread);
197 static void mono_thread_start (MonoThread *thread);
198 static void signal_thread_state_change (MonoInternalThread *thread);
199 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
200 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
201 static void self_suspend_internal (MonoInternalThread *thread);
202 static gboolean resume_thread_internal (MonoInternalThread *thread);
204 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
205 static void ref_stack_destroy (gpointer rs);
207 /* Spin lock for InterlockedXXX 64 bit functions */
208 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
209 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
210 static CRITICAL_SECTION interlocked_mutex;
212 /* global count of thread interruptions requested */
213 static gint32 thread_interruption_requested = 0;
215 /* Event signaled when a thread changes its background mode */
216 static HANDLE background_change_event;
218 static gboolean shutting_down = FALSE;
220 static gint32 managed_thread_id_counter = 0;
223 get_next_managed_thread_id (void)
225 return InterlockedIncrement (&managed_thread_id_counter);
229 mono_thread_get_tls_key (void)
231 return current_object_key;
235 mono_thread_get_tls_offset (void)
238 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
242 /* handle_store() and handle_remove() manage the array of threads that
243 * still need to be waited for when the main thread exits.
245 * If handle_store() returns FALSE the thread must not be started
246 * because Mono is shutting down.
248 static gboolean handle_store(MonoThread *thread)
250 mono_threads_lock ();
252 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
254 if (threads_starting_up)
255 mono_g_hash_table_remove (threads_starting_up, thread);
258 mono_threads_unlock ();
263 MONO_GC_REGISTER_ROOT_FIXED (threads);
264 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
267 /* We don't need to duplicate thread->handle, because it is
268 * only closed when the thread object is finalized by the GC.
270 g_assert (thread->internal_thread);
271 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
272 thread->internal_thread);
274 mono_threads_unlock ();
279 static gboolean handle_remove(MonoInternalThread *thread)
282 gsize tid = thread->tid;
284 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
286 mono_threads_lock ();
289 /* We have to check whether the thread object for the
290 * tid is still the same in the table because the
291 * thread might have been destroyed and the tid reused
292 * in the meantime, in which case the tid would be in
293 * the table, but with another thread object.
295 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
296 mono_g_hash_table_remove (threads, (gpointer)tid);
305 mono_threads_unlock ();
307 /* Don't close the handle here, wait for the object finalizer
308 * to do it. Otherwise, the following race condition applies:
310 * 1) Thread exits (and handle_remove() closes the handle)
312 * 2) Some other handle is reassigned the same slot
314 * 3) Another thread tries to join the first thread, and
315 * blocks waiting for the reassigned handle to be signalled
316 * (which might never happen). This is possible, because the
317 * thread calling Join() still has a reference to the first
323 static void ensure_synch_cs_set (MonoInternalThread *thread)
325 CRITICAL_SECTION *synch_cs;
327 if (thread->synch_cs != NULL) {
331 synch_cs = g_new0 (CRITICAL_SECTION, 1);
332 InitializeCriticalSection (synch_cs);
334 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
335 synch_cs, NULL) != NULL) {
336 /* Another thread must have installed this CS */
337 DeleteCriticalSection (synch_cs);
343 * NOTE: this function can be called also for threads different from the current one:
344 * make sure no code called from it will ever assume it is run on the thread that is
345 * getting cleaned up.
347 static void thread_cleanup (MonoInternalThread *thread)
349 g_assert (thread != NULL);
351 if (thread->abort_state_handle) {
352 mono_gchandle_free (thread->abort_state_handle);
353 thread->abort_state_handle = 0;
355 thread->abort_exc = NULL;
356 thread->current_appcontext = NULL;
359 * This is necessary because otherwise we might have
360 * cross-domain references which will not get cleaned up when
361 * the target domain is unloaded.
363 if (thread->cached_culture_info) {
365 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
366 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
369 ensure_synch_cs_set (thread);
371 EnterCriticalSection (thread->synch_cs);
373 thread->state |= ThreadState_Stopped;
374 thread->state &= ~ThreadState_Background;
376 LeaveCriticalSection (thread->synch_cs);
379 An interruption request has leaked to cleanup. Adjust the global counter.
381 This can happen is the abort source thread finds the abortee (this) thread
382 in unmanaged code. If this thread never trips back to managed code or check
383 the local flag it will be left set and positively unbalance the global counter.
385 Leaving the counter unbalanced will cause a performance degradation since all threads
386 will now keep checking their local flags all the time.
388 if (InterlockedExchange (&thread->interruption_requested, 0))
389 InterlockedDecrement (&thread_interruption_requested);
391 /* if the thread is not in the hash it has been removed already */
392 if (!handle_remove (thread)) {
393 if (thread == mono_thread_internal_current ()) {
394 mono_domain_unset ();
395 mono_memory_barrier ();
397 /* This needs to be called even if handle_remove () fails */
398 if (mono_thread_cleanup_fn)
399 mono_thread_cleanup_fn (thread);
402 mono_release_type_locks (thread);
404 mono_profiler_thread_end (thread->tid);
406 if (thread == mono_thread_internal_current ()) {
408 * This will signal async signal handlers that the thread has exited.
409 * The profiler callback needs this to be set, so it cannot be done earlier.
411 mono_domain_unset ();
412 mono_memory_barrier ();
415 if (thread == mono_thread_internal_current ())
416 mono_thread_pop_appdomain_ref ();
418 thread->cached_culture_info = NULL;
420 mono_free_static_data (thread->static_data, TRUE);
421 thread->static_data = NULL;
422 ref_stack_destroy (thread->appdomain_refs);
423 thread->appdomain_refs = NULL;
425 if (mono_thread_cleanup_fn)
426 mono_thread_cleanup_fn (thread);
428 if (mono_gc_is_moving ()) {
429 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
430 thread->thread_pinning_ref = NULL;
436 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
439 g_assert ((offset & 0x80000000) == 0);
440 offset &= 0x7fffffff;
441 idx = (offset >> 24) - 1;
442 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
446 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
448 static MonoClassField *current_thread_field = NULL;
452 if (!current_thread_field) {
453 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
454 g_assert (current_thread_field);
457 mono_class_vtable (domain, mono_defaults.thread_class);
458 mono_domain_lock (domain);
459 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
460 mono_domain_unlock (domain);
463 return get_thread_static_data (thread, offset);
467 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
469 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
471 g_assert (current->obj.vtable->domain == domain);
473 g_assert (!*current_thread_ptr);
474 *current_thread_ptr = current;
477 static MonoInternalThread*
478 create_internal_thread_object (void)
480 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
481 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
485 create_thread_object (MonoDomain *domain)
487 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
488 return (MonoThread*)mono_gc_alloc_mature (vt);
492 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
494 MonoThread *thread = create_thread_object (domain);
495 MONO_OBJECT_SETREF (thread, internal_thread, internal);
500 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
502 MonoDomain *domain = mono_get_root_domain ();
504 if (!candidate || candidate->obj.vtable->domain != domain)
505 candidate = new_thread_with_internal (domain, thread);
506 set_current_thread_for_domain (domain, thread, candidate);
507 g_assert (!thread->root_domain_thread);
508 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
511 static guint32 WINAPI start_wrapper_internal(void *data)
513 MonoThreadInfo *info;
514 struct StartInfo *start_info=(struct StartInfo *)data;
515 guint32 (*start_func)(void *);
519 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
522 MonoInternalThread *internal = start_info->obj->internal_thread;
523 MonoObject *start_delegate = start_info->delegate;
524 MonoDomain *domain = start_info->obj->obj.vtable->domain;
526 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
528 /* We can be sure start_info->obj->tid and
529 * start_info->obj->handle have been set, because the thread
530 * was created suspended, and these values were set before the
534 info = mono_thread_info_current ();
536 internal->thread_info = info;
541 SET_CURRENT_OBJECT (internal);
543 mono_monitor_init_tls ();
545 /* Every thread references the appdomain which created it */
546 mono_thread_push_appdomain_ref (domain);
548 if (!mono_domain_set (domain, FALSE)) {
549 /* No point in raising an appdomain_unloaded exception here */
550 /* FIXME: Cleanup here */
551 mono_thread_pop_appdomain_ref ();
555 start_func = start_info->func;
556 start_arg = start_info->start_arg;
558 /* We have to do this here because mono_thread_new_init()
559 requires that root_domain_thread is set up. */
560 thread_adjust_static_data (internal);
561 init_root_domain_thread (internal, start_info->obj);
563 /* This MUST be called before any managed code can be
564 * executed, as it calls the callback function that (for the
565 * jit) sets the lmf marker.
567 mono_thread_new_init (tid, &tid, start_func);
568 internal->stack_ptr = &tid;
570 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
572 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
574 /* On 2.0 profile (and higher), set explicitly since state might have been
576 if (internal->apartment_state == ThreadApartmentState_Unknown)
577 internal->apartment_state = ThreadApartmentState_MTA;
579 mono_thread_init_apartment_state ();
581 if(internal->start_notify!=NULL) {
582 /* Let the thread that called Start() know we're
585 ReleaseSemaphore (internal->start_notify, 1, NULL);
588 mono_threads_lock ();
589 mono_g_hash_table_remove (thread_start_args, start_info->obj);
590 mono_threads_unlock ();
592 mono_thread_set_execution_context (start_info->obj->ec_to_set);
593 start_info->obj->ec_to_set = NULL;
596 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
600 * Call this after calling start_notify, since the profiler callback might want
601 * to lock the thread, and the lock is held by thread_start () which waits for
604 mono_profiler_thread_start (tid);
606 /* start_func is set only for unmanaged start functions */
608 start_func (start_arg);
611 g_assert (start_delegate != NULL);
612 args [0] = start_arg;
613 /* we may want to handle the exception here. See comment below on unhandled exceptions */
614 mono_runtime_delegate_invoke (start_delegate, args, NULL);
617 /* If the thread calls ExitThread at all, this remaining code
618 * will not be executed, but the main thread will eventually
619 * call thread_cleanup() on this thread's behalf.
622 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
624 /* Do any cleanup needed for apartment state. This
625 * cannot be done in thread_cleanup since thread_cleanup could be
626 * called for a thread other than the current thread.
627 * mono_thread_cleanup_apartment_state cleans up apartment
628 * for the current thead */
629 mono_thread_cleanup_apartment_state ();
631 thread_cleanup (internal);
633 /* Remove the reference to the thread object in the TLS data,
634 * so the thread object can be finalized. This won't be
635 * reached if the thread threw an uncaught exception, so those
636 * thread handles will stay referenced :-( (This is due to
637 * missing support for scanning thread-specific data in the
638 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
641 SET_CURRENT_OBJECT (NULL);
646 static guint32 WINAPI start_wrapper(void *data)
650 /* Avoid scanning the frames above this frame during a GC */
651 mono_gc_set_stack_end ((void*)&dummy);
653 return start_wrapper_internal (data);
656 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
658 if (mono_thread_start_cb) {
659 mono_thread_start_cb (tid, stack_start, func);
663 void mono_threads_set_default_stacksize (guint32 stacksize)
665 default_stacksize = stacksize;
668 guint32 mono_threads_get_default_stacksize (void)
670 return default_stacksize;
674 * mono_create_thread:
676 * This is a wrapper around CreateThread which handles differences in the type of
677 * the the 'tid' argument.
679 gpointer mono_create_thread (WapiSecurityAttributes *security,
680 guint32 stacksize, WapiThreadStart start,
681 gpointer param, guint32 create, gsize *tid)
688 res = mono_threads_CreateThread (security, stacksize, start, param, create, &real_tid);
692 res = CreateThread (security, stacksize, start, param, create, tid);
699 * The thread start argument may be an object reference, and there is
700 * no ref to keep it alive when the new thread is started but not yet
701 * registered with the collector. So we store it in a GC tracked hash
704 * LOCKING: Assumes the threads lock is held.
707 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
709 if (thread_start_args == NULL) {
710 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
711 thread_start_args = mono_g_hash_table_new (NULL, NULL);
713 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
717 * mono_thread_create_internal:
719 * If NO_DETACH is TRUE, then the thread is not detached using pthread_detach (). This is needed to fix the race condition where waiting for a thred to exit only waits for its exit event to be
720 * signalled, which can cause shutdown crashes if the thread shutdown code accesses data already freed by the runtime shutdown.
721 * Currently, this is only used for the finalizer thread.
724 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, gboolean no_detach, guint32 stack_size)
727 MonoInternalThread *internal;
728 HANDLE thread_handle;
729 struct StartInfo *start_info;
731 guint32 create_flags;
733 thread = create_thread_object (domain);
734 internal = create_internal_thread_object ();
735 MONO_OBJECT_SETREF (thread, internal_thread, internal);
737 start_info=g_new0 (struct StartInfo, 1);
738 start_info->func = func;
739 start_info->obj = thread;
740 start_info->start_arg = arg;
742 mono_threads_lock ();
744 mono_threads_unlock ();
748 if (threads_starting_up == NULL) {
749 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
750 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
753 register_thread_start_argument (thread, start_info);
754 mono_g_hash_table_insert (threads_starting_up, thread, thread);
755 mono_threads_unlock ();
758 stack_size = default_stacksize_for_thread (internal);
760 /* Create suspended, so we can do some housekeeping before the thread
763 create_flags = CREATE_SUSPENDED;
766 create_flags |= CREATE_NO_DETACH;
768 thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
770 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
771 if (thread_handle == NULL) {
772 /* The thread couldn't be created, so throw an exception */
773 mono_threads_lock ();
774 mono_g_hash_table_remove (threads_starting_up, thread);
775 mono_threads_unlock ();
777 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
781 internal->handle=thread_handle;
783 internal->apartment_state=ThreadApartmentState_Unknown;
784 internal->managed_id = get_next_managed_thread_id ();
785 if (mono_gc_is_moving ()) {
786 internal->thread_pinning_ref = internal;
787 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
790 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
791 InitializeCriticalSection (internal->synch_cs);
793 internal->threadpool_thread = threadpool_thread;
794 if (threadpool_thread)
795 mono_thread_set_state (internal, ThreadState_Background);
797 if (handle_store (thread))
798 ResumeThread (thread_handle);
800 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
801 if (mono_check_corlib_version () == NULL)
802 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
808 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
810 mono_thread_create_internal (domain, func, arg, FALSE, FALSE, 0);
813 #if defined(HOST_WIN32) && defined(__GNUC__)
814 static __inline__ __attribute__((always_inline))
815 /* This is not defined by gcc */
817 __readfsdword (unsigned long long offset)
819 unsigned long long value;
820 __asm__("movl %%fs:%a[offset], %k[value]" : [value] "=q" (value) : [offset] "irm" (offset));
826 * mono_thread_get_stack_bounds:
828 * Return the address and size of the current threads stack. Return NULL as the
829 * stack address if the stack address cannot be determined.
832 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
834 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
835 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
836 *stsize = pthread_get_stacksize_np (pthread_self ());
838 /* staddr points to the start of the stack, not the end */
840 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
842 /* FIXME: simplify the mess below */
843 #elif defined(HOST_WIN32)
844 /* http://en.wikipedia.org/wiki/Win32_Thread_Information_Block */
845 void* tib = (void*)__readfsdword(0x18);
846 guint8 *stackTop = (guint8*)*(int*)((char*)tib + 4);
847 guint8 *stackBottom = (guint8*)*(int*)((char*)tib + 8);
849 *staddr = stackBottom;
850 *stsize = stackTop - stackBottom;
854 guint8 *current = (guint8*)&attr;
857 *stsize = (size_t)-1;
859 pthread_attr_init (&attr);
860 # ifdef HAVE_PTHREAD_GETATTR_NP
861 pthread_getattr_np (pthread_self(), &attr);
863 # ifdef HAVE_PTHREAD_ATTR_GET_NP
864 pthread_attr_get_np (pthread_self(), &attr);
867 pthread_attr_getstacksize (&attr, &stsize);
868 # elif defined(__OpenBSD__)
872 rslt = pthread_stackseg_np(pthread_self(), &ss);
873 g_assert (rslt == 0);
875 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
876 *stsize = ss.ss_size;
885 # if !defined(__OpenBSD__)
886 pthread_attr_getstack (&attr, (void**)staddr, stsize);
889 g_assert ((current > *staddr) && (current < *staddr + *stsize));
892 pthread_attr_destroy (&attr);
895 /* When running under emacs, sometimes staddr is not aligned to a page size */
896 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
900 mono_thread_attach (MonoDomain *domain)
902 MonoThreadInfo *info;
903 MonoInternalThread *thread;
904 MonoThread *current_thread;
905 HANDLE thread_handle;
908 if ((thread = mono_thread_internal_current ())) {
909 if (domain != mono_domain_get ())
910 mono_domain_set (domain, TRUE);
911 /* Already attached */
912 return mono_thread_current ();
915 if (!mono_gc_register_thread (&domain)) {
916 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.", GetCurrentThreadId ());
919 thread = create_internal_thread_object ();
921 thread_handle = GetCurrentThread ();
922 g_assert (thread_handle);
924 tid=GetCurrentThreadId ();
927 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
928 * refer to the thread from other threads for things like aborting.
930 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
931 THREAD_ALL_ACCESS, TRUE, 0);
933 thread->handle=thread_handle;
935 #ifdef PLATFORM_ANDROID
936 thread->android_tid = (gpointer) gettid ();
938 thread->apartment_state=ThreadApartmentState_Unknown;
939 thread->managed_id = get_next_managed_thread_id ();
940 if (mono_gc_is_moving ()) {
941 thread->thread_pinning_ref = thread;
942 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
945 thread->stack_ptr = &tid;
947 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
948 InitializeCriticalSection (thread->synch_cs);
950 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
952 info = mono_thread_info_current ();
954 thread->thread_info = info;
956 current_thread = new_thread_with_internal (domain, thread);
958 if (!handle_store (current_thread)) {
959 /* Mono is shutting down, so just wait for the end */
964 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
966 SET_CURRENT_OBJECT (thread);
967 mono_domain_set (domain, TRUE);
969 mono_monitor_init_tls ();
971 thread_adjust_static_data (thread);
973 init_root_domain_thread (thread, current_thread);
974 if (domain != mono_get_root_domain ())
975 set_current_thread_for_domain (domain, thread, current_thread);
978 if (mono_thread_attach_cb) {
982 mono_thread_get_stack_bounds (&staddr, &stsize);
985 mono_thread_attach_cb (tid, &tid);
987 mono_thread_attach_cb (tid, staddr + stsize);
990 // FIXME: Need a separate callback
991 mono_profiler_thread_start (tid);
993 return current_thread;
997 mono_thread_detach (MonoThread *thread)
999 g_return_if_fail (thread != NULL);
1001 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
1003 thread_cleanup (thread->internal_thread);
1005 SET_CURRENT_OBJECT (NULL);
1006 mono_domain_unset ();
1008 /* Don't need to CloseHandle this thread, even though we took a
1009 * reference in mono_thread_attach (), because the GC will do it
1010 * when the Thread object is finalised.
1017 MonoInternalThread *thread = mono_thread_internal_current ();
1019 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1021 thread_cleanup (thread);
1022 SET_CURRENT_OBJECT (NULL);
1023 mono_domain_unset ();
1025 /* we could add a callback here for embedders to use. */
1026 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1027 exit (mono_environment_exitcode_get ());
1032 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1034 MonoInternalThread *internal = create_internal_thread_object ();
1036 internal->state = ThreadState_Unstarted;
1037 internal->apartment_state = ThreadApartmentState_Unknown;
1038 internal->managed_id = get_next_managed_thread_id ();
1040 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1043 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
1046 guint32 (*start_func)(void *);
1047 struct StartInfo *start_info;
1050 MonoInternalThread *internal;
1052 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1054 if (!this->internal_thread)
1055 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1056 internal = this->internal_thread;
1058 ensure_synch_cs_set (internal);
1060 EnterCriticalSection (internal->synch_cs);
1062 if ((internal->state & ThreadState_Unstarted) == 0) {
1063 LeaveCriticalSection (internal->synch_cs);
1064 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1068 if ((internal->state & ThreadState_Aborted) != 0) {
1069 LeaveCriticalSection (internal->synch_cs);
1074 /* This is freed in start_wrapper */
1075 start_info = g_new0 (struct StartInfo, 1);
1076 start_info->func = start_func;
1077 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1078 start_info->delegate = start;
1079 start_info->obj = this;
1080 g_assert (this->obj.vtable->domain == mono_domain_get ());
1082 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1083 if (internal->start_notify==NULL) {
1084 LeaveCriticalSection (internal->synch_cs);
1085 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1086 g_free (start_info);
1090 mono_threads_lock ();
1091 register_thread_start_argument (this, start_info);
1092 if (threads_starting_up == NULL) {
1093 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1094 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1096 mono_g_hash_table_insert (threads_starting_up, this, this);
1097 mono_threads_unlock ();
1099 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1100 CREATE_SUSPENDED, &tid);
1102 LeaveCriticalSection (internal->synch_cs);
1103 mono_threads_lock ();
1104 mono_g_hash_table_remove (threads_starting_up, this);
1105 mono_threads_unlock ();
1106 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1110 internal->handle=thread;
1112 if (mono_gc_is_moving ()) {
1113 internal->thread_pinning_ref = internal;
1114 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1118 /* Don't call handle_store() here, delay it to Start.
1119 * We can't join a thread (trying to will just block
1120 * forever) until it actually starts running, so don't
1121 * store the handle till then.
1124 mono_thread_start (this);
1126 internal->state &= ~ThreadState_Unstarted;
1128 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1130 LeaveCriticalSection (internal->synch_cs);
1135 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1137 MONO_ARCH_SAVE_REGS;
1139 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1142 CloseHandle (thread);
1144 if (this->synch_cs) {
1145 CRITICAL_SECTION *synch_cs = this->synch_cs;
1146 this->synch_cs = NULL;
1147 DeleteCriticalSection (synch_cs);
1152 void *name = this->name;
1158 static void mono_thread_start (MonoThread *thread)
1160 MonoInternalThread *internal = thread->internal_thread;
1162 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1164 /* Only store the handle when the thread is about to be
1165 * launched, to avoid the main thread deadlocking while trying
1166 * to clean up a thread that will never be signalled.
1168 if (!handle_store (thread))
1171 ResumeThread (internal->handle);
1173 if(internal->start_notify!=NULL) {
1174 /* Wait for the thread to set up its TLS data etc, so
1175 * theres no potential race condition if someone tries
1176 * to look up the data believing the thread has
1180 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1182 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1183 CloseHandle (internal->start_notify);
1184 internal->start_notify = NULL;
1187 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1190 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1193 MonoInternalThread *thread = mono_thread_internal_current ();
1195 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1197 mono_thread_current_check_pending_interrupt ();
1200 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1202 res = SleepEx(ms,TRUE);
1204 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1206 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1207 MonoException* exc = mono_thread_execute_interruption (thread);
1209 mono_raise_exception (exc);
1221 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1226 ves_icall_System_Threading_Thread_GetDomainID (void)
1228 MONO_ARCH_SAVE_REGS;
1230 return mono_domain_get()->domain_id;
1234 ves_icall_System_Threading_Thread_Yield (void)
1237 return SwitchToThread ();
1239 return sched_yield () == 0;
1244 * mono_thread_get_name:
1246 * Return the name of the thread. NAME_LEN is set to the length of the name.
1247 * Return NULL if the thread has no name. The returned memory is owned by the
1251 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1255 ensure_synch_cs_set (this_obj);
1257 EnterCriticalSection (this_obj->synch_cs);
1259 if (!this_obj->name) {
1263 *name_len = this_obj->name_len;
1264 res = g_new (gunichar2, this_obj->name_len);
1265 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1268 LeaveCriticalSection (this_obj->synch_cs);
1274 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1278 ensure_synch_cs_set (this_obj);
1280 EnterCriticalSection (this_obj->synch_cs);
1282 if (!this_obj->name)
1285 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1287 LeaveCriticalSection (this_obj->synch_cs);
1293 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1295 ensure_synch_cs_set (this_obj);
1297 EnterCriticalSection (this_obj->synch_cs);
1299 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1300 LeaveCriticalSection (this_obj->synch_cs);
1302 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1306 this_obj->name = g_new (gunichar2, mono_string_length (name));
1307 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1308 this_obj->name_len = mono_string_length (name);
1311 this_obj->name = NULL;
1314 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1316 LeaveCriticalSection (this_obj->synch_cs);
1317 if (this_obj->name) {
1318 char *tname = mono_string_to_utf8 (name);
1319 mono_profiler_thread_name (this_obj->tid, tname);
1325 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1327 mono_thread_set_name_internal (this_obj, name, TRUE);
1330 /* If the array is already in the requested domain, we just return it,
1331 otherwise we return a copy in that domain. */
1333 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1340 if (mono_object_domain (arr) == domain)
1343 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1344 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1349 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1351 return byte_array_to_domain (arr, mono_get_root_domain ());
1355 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1357 return byte_array_to_domain (arr, mono_domain_get ());
1361 mono_thread_current (void)
1363 MonoDomain *domain = mono_domain_get ();
1364 MonoInternalThread *internal = mono_thread_internal_current ();
1365 MonoThread **current_thread_ptr;
1367 g_assert (internal);
1368 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1370 if (!*current_thread_ptr) {
1371 g_assert (domain != mono_get_root_domain ());
1372 *current_thread_ptr = new_thread_with_internal (domain, internal);
1374 return *current_thread_ptr;
1378 mono_thread_internal_current (void)
1380 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1381 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1385 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1386 int ms, HANDLE thread)
1388 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1391 mono_thread_current_check_pending_interrupt ();
1393 ensure_synch_cs_set (this);
1395 EnterCriticalSection (this->synch_cs);
1397 if ((this->state & ThreadState_Unstarted) != 0) {
1398 LeaveCriticalSection (this->synch_cs);
1400 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1404 LeaveCriticalSection (this->synch_cs);
1409 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1411 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1413 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1415 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1417 if(ret==WAIT_OBJECT_0) {
1418 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1423 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1429 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1437 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1440 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1442 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1444 if (ret != WAIT_IO_COMPLETION)
1447 exc = mono_thread_execute_interruption (thread);
1449 mono_raise_exception (exc);
1454 /* Re-calculate ms according to the time passed */
1455 diff_ms = (mono_100ns_ticks () - start) / 10000;
1456 if (diff_ms >= ms) {
1460 wait = ms - diff_ms;
1466 /* FIXME: exitContext isnt documented */
1467 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1473 MonoObject *waitHandle;
1474 MonoInternalThread *thread = mono_thread_internal_current ();
1476 /* Do this WaitSleepJoin check before creating objects */
1477 mono_thread_current_check_pending_interrupt ();
1479 numhandles = mono_array_length(mono_handles);
1480 handles = g_new0(HANDLE, numhandles);
1482 for(i = 0; i < numhandles; i++) {
1483 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1484 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1491 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1493 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1495 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1499 if(ret==WAIT_FAILED) {
1500 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1502 } else if(ret==WAIT_TIMEOUT) {
1503 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1510 /* FIXME: exitContext isnt documented */
1511 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1513 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1517 MonoObject *waitHandle;
1518 MonoInternalThread *thread = mono_thread_internal_current ();
1520 /* Do this WaitSleepJoin check before creating objects */
1521 mono_thread_current_check_pending_interrupt ();
1523 numhandles = mono_array_length(mono_handles);
1524 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1527 for(i = 0; i < numhandles; i++) {
1528 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1529 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1536 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1538 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1540 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1542 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1545 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1547 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1548 return ret - WAIT_OBJECT_0;
1550 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1551 return ret - WAIT_ABANDONED_0;
1558 /* FIXME: exitContext isnt documented */
1559 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1562 MonoInternalThread *thread = mono_thread_internal_current ();
1564 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1570 mono_thread_current_check_pending_interrupt ();
1572 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1574 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1576 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1578 if(ret==WAIT_FAILED) {
1579 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1581 } else if(ret==WAIT_TIMEOUT) {
1582 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1590 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1593 MonoInternalThread *thread = mono_thread_internal_current ();
1595 MONO_ARCH_SAVE_REGS;
1600 mono_thread_current_check_pending_interrupt ();
1602 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1604 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1606 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1608 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1611 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1615 MONO_ARCH_SAVE_REGS;
1620 mutex = CreateMutex (NULL, owned, NULL);
1622 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1624 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1632 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1633 MONO_ARCH_SAVE_REGS;
1635 return(ReleaseMutex (handle));
1638 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1644 MONO_ARCH_SAVE_REGS;
1646 *error = ERROR_SUCCESS;
1648 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1650 *error = GetLastError ();
1657 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1661 MONO_ARCH_SAVE_REGS;
1666 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1668 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1669 mono_string_chars (name));
1671 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1679 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1683 MONO_ARCH_SAVE_REGS;
1685 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1690 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1694 MONO_ARCH_SAVE_REGS;
1696 *error = ERROR_SUCCESS;
1698 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1700 *error = GetLastError ();
1706 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1710 MONO_ARCH_SAVE_REGS;
1715 event = CreateEvent (NULL, manual, initial, NULL);
1717 event = CreateEvent (NULL, manual, initial,
1718 mono_string_chars (name));
1720 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1728 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1729 MONO_ARCH_SAVE_REGS;
1731 return (SetEvent(handle));
1734 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1735 MONO_ARCH_SAVE_REGS;
1737 return (ResetEvent(handle));
1741 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1742 MONO_ARCH_SAVE_REGS;
1744 CloseHandle (handle);
1747 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1753 MONO_ARCH_SAVE_REGS;
1755 *error = ERROR_SUCCESS;
1757 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1759 *error = GetLastError ();
1765 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1767 MONO_ARCH_SAVE_REGS;
1769 return InterlockedIncrement (location);
1772 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1776 MONO_ARCH_SAVE_REGS;
1778 mono_interlocked_lock ();
1782 mono_interlocked_unlock ();
1788 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1790 MONO_ARCH_SAVE_REGS;
1792 return InterlockedDecrement(location);
1795 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1799 MONO_ARCH_SAVE_REGS;
1801 mono_interlocked_lock ();
1805 mono_interlocked_unlock ();
1810 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1812 MONO_ARCH_SAVE_REGS;
1814 return InterlockedExchange(location, value);
1817 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1820 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1821 mono_gc_wbarrier_generic_nostore (location);
1825 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1827 return InterlockedExchangePointer(location, value);
1830 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1832 IntFloatUnion val, ret;
1834 MONO_ARCH_SAVE_REGS;
1837 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1843 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1845 #if SIZEOF_VOID_P == 8
1846 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1851 * According to MSDN, this function is only atomic with regards to the
1852 * other Interlocked functions on 32 bit platforms.
1854 mono_interlocked_lock ();
1857 mono_interlocked_unlock ();
1864 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1866 #if SIZEOF_VOID_P == 8
1867 LongDoubleUnion val, ret;
1870 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1877 * According to MSDN, this function is only atomic with regards to the
1878 * other Interlocked functions on 32 bit platforms.
1880 mono_interlocked_lock ();
1883 mono_interlocked_unlock ();
1889 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1891 MONO_ARCH_SAVE_REGS;
1893 return InterlockedCompareExchange(location, value, comparand);
1896 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1899 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1900 mono_gc_wbarrier_generic_nostore (location);
1904 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1906 return InterlockedCompareExchangePointer(location, value, comparand);
1909 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1911 IntFloatUnion val, ret, cmp;
1913 MONO_ARCH_SAVE_REGS;
1916 cmp.fval = comparand;
1917 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1923 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1925 #if SIZEOF_VOID_P == 8
1926 LongDoubleUnion val, comp, ret;
1929 comp.fval = comparand;
1930 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1936 mono_interlocked_lock ();
1938 if (old == comparand)
1940 mono_interlocked_unlock ();
1947 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1949 #if SIZEOF_VOID_P == 8
1950 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1954 mono_interlocked_lock ();
1956 if (old == comparand)
1958 mono_interlocked_unlock ();
1965 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1968 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1969 mono_gc_wbarrier_generic_nostore (location);
1974 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1977 res = InterlockedExchangePointer ((gpointer *)location, value);
1978 mono_gc_wbarrier_generic_nostore (location);
1983 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1985 #if SIZEOF_VOID_P == 8
1986 /* Should be implemented as a JIT intrinsic */
1987 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1992 mono_interlocked_lock ();
1994 *location = orig + value;
1995 mono_interlocked_unlock ();
1997 return orig + value;
2002 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2004 #if SIZEOF_VOID_P == 8
2005 /* Should be implemented as a JIT intrinsic */
2006 mono_raise_exception (mono_get_exception_not_implemented (NULL));
2011 mono_interlocked_lock ();
2013 *location = orig + value;
2014 mono_interlocked_unlock ();
2016 return orig + value;
2021 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2023 #if SIZEOF_VOID_P == 8
2024 /* 64 bit reads are already atomic */
2029 mono_interlocked_lock ();
2031 mono_interlocked_unlock ();
2038 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2040 mono_threads_lock ();
2041 mono_threads_unlock ();
2045 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
2047 mono_thread_clr_state (this, state);
2049 if (state & ThreadState_Background) {
2050 /* If the thread changes the background mode, the main thread has to
2051 * be notified, since it has to rebuild the list of threads to
2054 SetEvent (background_change_event);
2059 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2061 mono_thread_set_state (this, state);
2063 if (state & ThreadState_Background) {
2064 /* If the thread changes the background mode, the main thread has to
2065 * be notified, since it has to rebuild the list of threads to
2068 SetEvent (background_change_event);
2073 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2077 ensure_synch_cs_set (this);
2079 EnterCriticalSection (this->synch_cs);
2081 state = this->state;
2083 LeaveCriticalSection (this->synch_cs);
2088 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2090 MonoInternalThread *current;
2093 ensure_synch_cs_set (this);
2095 current = mono_thread_internal_current ();
2097 EnterCriticalSection (this->synch_cs);
2099 this->thread_interrupt_requested = TRUE;
2100 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2102 LeaveCriticalSection (this->synch_cs);
2105 abort_thread_internal (this, TRUE, FALSE);
2109 void mono_thread_current_check_pending_interrupt ()
2111 MonoInternalThread *thread = mono_thread_internal_current ();
2112 gboolean throw = FALSE;
2114 mono_debugger_check_interruption ();
2116 ensure_synch_cs_set (thread);
2118 EnterCriticalSection (thread->synch_cs);
2120 if (thread->thread_interrupt_requested) {
2122 thread->thread_interrupt_requested = FALSE;
2125 LeaveCriticalSection (thread->synch_cs);
2128 mono_raise_exception (mono_get_exception_thread_interrupted ());
2133 mono_thread_get_abort_signal (void)
2137 #elif defined(PLATFORM_ANDROID)
2139 #elif !defined (SIGRTMIN)
2144 #endif /* SIGUSR1 */
2146 static int abort_signum = -1;
2148 if (abort_signum != -1)
2149 return abort_signum;
2150 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2151 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2152 struct sigaction sinfo;
2153 sigaction (i, NULL, &sinfo);
2154 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2159 /* fallback to the old way */
2161 #endif /* HOST_WIN32 */
2165 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2167 MonoException* exc = mono_thread_request_interruption (FALSE);
2168 if (exc) mono_raise_exception (exc);
2170 #endif /* HOST_WIN32 */
2173 * signal_thread_state_change
2175 * Tells the thread that his state has changed and it has to enter the new
2176 * state as soon as possible.
2178 static void signal_thread_state_change (MonoInternalThread *thread)
2180 if (thread == mono_thread_internal_current ()) {
2181 /* Do it synchronously */
2182 MonoException *exc = mono_thread_request_interruption (FALSE);
2184 mono_raise_exception (exc);
2188 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2190 /* fixme: store the state somewhere */
2191 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2194 * This will cause waits to be broken.
2195 * It will also prevent the thread from entering a wait, so if the thread returns
2196 * from the wait before it receives the abort signal, it will just spin in the wait
2197 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2200 wapi_interrupt_thread (thread->handle);
2201 #endif /* HOST_WIN32 */
2205 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2207 ensure_synch_cs_set (thread);
2209 EnterCriticalSection (thread->synch_cs);
2211 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2212 (thread->state & ThreadState_StopRequested) != 0 ||
2213 (thread->state & ThreadState_Stopped) != 0)
2215 LeaveCriticalSection (thread->synch_cs);
2219 if ((thread->state & ThreadState_Unstarted) != 0) {
2220 thread->state |= ThreadState_Aborted;
2221 LeaveCriticalSection (thread->synch_cs);
2225 thread->state |= ThreadState_AbortRequested;
2226 if (thread->abort_state_handle)
2227 mono_gchandle_free (thread->abort_state_handle);
2229 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2230 g_assert (thread->abort_state_handle);
2232 thread->abort_state_handle = 0;
2234 thread->abort_exc = NULL;
2237 * abort_exc is set in mono_thread_execute_interruption(),
2238 * triggered by the call to signal_thread_state_change(),
2239 * below. There's a point between where we have
2240 * abort_state_handle set, but abort_exc NULL, but that's not
2244 LeaveCriticalSection (thread->synch_cs);
2246 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2248 /* During shutdown, we can't wait for other threads */
2250 /* Make sure the thread is awake */
2251 mono_thread_resume (thread);
2253 abort_thread_internal (thread, TRUE, TRUE);
2257 ves_icall_System_Threading_Thread_ResetAbort (void)
2259 MonoInternalThread *thread = mono_thread_internal_current ();
2260 gboolean was_aborting;
2262 ensure_synch_cs_set (thread);
2264 EnterCriticalSection (thread->synch_cs);
2265 was_aborting = thread->state & ThreadState_AbortRequested;
2266 thread->state &= ~ThreadState_AbortRequested;
2267 LeaveCriticalSection (thread->synch_cs);
2269 if (!was_aborting) {
2270 const char *msg = "Unable to reset abort because no abort was requested";
2271 mono_raise_exception (mono_get_exception_thread_state (msg));
2273 thread->abort_exc = NULL;
2274 if (thread->abort_state_handle) {
2275 mono_gchandle_free (thread->abort_state_handle);
2276 /* This is actually not necessary - the handle
2277 only counts if the exception is set */
2278 thread->abort_state_handle = 0;
2283 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2285 ensure_synch_cs_set (thread);
2287 EnterCriticalSection (thread->synch_cs);
2289 thread->state &= ~ThreadState_AbortRequested;
2291 if (thread->abort_exc) {
2292 thread->abort_exc = NULL;
2293 if (thread->abort_state_handle) {
2294 mono_gchandle_free (thread->abort_state_handle);
2295 /* This is actually not necessary - the handle
2296 only counts if the exception is set */
2297 thread->abort_state_handle = 0;
2301 LeaveCriticalSection (thread->synch_cs);
2305 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2307 MonoInternalThread *thread = this->internal_thread;
2308 MonoObject *state, *deserialized = NULL, *exc;
2311 if (!thread->abort_state_handle)
2314 state = mono_gchandle_get_target (thread->abort_state_handle);
2317 domain = mono_domain_get ();
2318 if (mono_object_domain (state) == domain)
2321 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2323 if (!deserialized) {
2324 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2326 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2327 mono_raise_exception (invalid_op_exc);
2330 return deserialized;
2334 mono_thread_suspend (MonoInternalThread *thread)
2336 ensure_synch_cs_set (thread);
2338 EnterCriticalSection (thread->synch_cs);
2340 if ((thread->state & ThreadState_Unstarted) != 0 ||
2341 (thread->state & ThreadState_Aborted) != 0 ||
2342 (thread->state & ThreadState_Stopped) != 0)
2344 LeaveCriticalSection (thread->synch_cs);
2348 if ((thread->state & ThreadState_Suspended) != 0 ||
2349 (thread->state & ThreadState_SuspendRequested) != 0 ||
2350 (thread->state & ThreadState_StopRequested) != 0)
2352 LeaveCriticalSection (thread->synch_cs);
2356 thread->state |= ThreadState_SuspendRequested;
2358 LeaveCriticalSection (thread->synch_cs);
2360 suspend_thread_internal (thread, FALSE);
2365 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2367 if (!mono_thread_suspend (thread))
2368 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2372 mono_thread_resume (MonoInternalThread *thread)
2374 ensure_synch_cs_set (thread);
2376 EnterCriticalSection (thread->synch_cs);
2378 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2379 thread->state &= ~ThreadState_SuspendRequested;
2380 LeaveCriticalSection (thread->synch_cs);
2384 if ((thread->state & ThreadState_Suspended) == 0 ||
2385 (thread->state & ThreadState_Unstarted) != 0 ||
2386 (thread->state & ThreadState_Aborted) != 0 ||
2387 (thread->state & ThreadState_Stopped) != 0)
2389 LeaveCriticalSection (thread->synch_cs);
2393 return resume_thread_internal (thread);
2397 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2399 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2400 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2404 mono_threads_is_critical_method (MonoMethod *method)
2406 switch (method->wrapper_type) {
2407 case MONO_WRAPPER_RUNTIME_INVOKE:
2408 case MONO_WRAPPER_XDOMAIN_INVOKE:
2409 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2416 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2421 if (mono_threads_is_critical_method (m)) {
2422 *((gboolean*)data) = TRUE;
2429 is_running_protected_wrapper (void)
2431 gboolean found = FALSE;
2432 mono_stack_walk (find_wrapper, &found);
2436 void mono_thread_internal_stop (MonoInternalThread *thread)
2438 ensure_synch_cs_set (thread);
2440 EnterCriticalSection (thread->synch_cs);
2442 if ((thread->state & ThreadState_StopRequested) != 0 ||
2443 (thread->state & ThreadState_Stopped) != 0)
2445 LeaveCriticalSection (thread->synch_cs);
2449 /* Make sure the thread is awake */
2450 mono_thread_resume (thread);
2452 thread->state |= ThreadState_StopRequested;
2453 thread->state &= ~ThreadState_AbortRequested;
2455 LeaveCriticalSection (thread->synch_cs);
2457 abort_thread_internal (thread, TRUE, TRUE);
2460 void mono_thread_stop (MonoThread *thread)
2462 mono_thread_internal_stop (thread->internal_thread);
2466 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2468 return *((volatile gint8 *) (ptr));
2472 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2474 return *((volatile gint16 *) (ptr));
2478 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2480 return *((volatile gint32 *) (ptr));
2484 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2486 return *((volatile gint64 *) (ptr));
2490 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2492 return (void *) *((volatile void **) ptr);
2496 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2498 return *((volatile double *) (ptr));
2502 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2504 return *((volatile float *) (ptr));
2508 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2510 return (MonoObject*)*((volatile MonoObject**)ptr);
2514 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2516 *((volatile gint8 *) ptr) = value;
2520 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2522 *((volatile gint16 *) ptr) = value;
2526 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2528 *((volatile gint32 *) ptr) = value;
2532 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2534 *((volatile gint64 *) ptr) = value;
2538 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2540 *((volatile void **) ptr) = value;
2544 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2546 mono_gc_wbarrier_generic_store (ptr, value);
2550 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2552 *((volatile double *) ptr) = value;
2556 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2558 *((volatile float *) ptr) = value;
2562 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2564 *((volatile MonoObject **) ptr) = value;
2565 mono_gc_wbarrier_generic_nostore (ptr);
2568 void mono_thread_init (MonoThreadStartCB start_cb,
2569 MonoThreadAttachCB attach_cb)
2571 InitializeCriticalSection(&threads_mutex);
2572 InitializeCriticalSection(&interlocked_mutex);
2573 InitializeCriticalSection(&contexts_mutex);
2575 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2576 g_assert(background_change_event != NULL);
2578 mono_init_static_data_info (&thread_static_info);
2579 mono_init_static_data_info (&context_static_info);
2581 MONO_FAST_TLS_INIT (tls_current_object);
2582 mono_native_tls_alloc (¤t_object_key, NULL);
2583 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2585 mono_thread_start_cb = start_cb;
2586 mono_thread_attach_cb = attach_cb;
2588 /* Get a pseudo handle to the current process. This is just a
2589 * kludge so that wapi can build a process handle if needed.
2590 * As a pseudo handle is returned, we don't need to clean
2593 GetCurrentProcess ();
2596 void mono_thread_cleanup (void)
2598 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2599 /* The main thread must abandon any held mutexes (particularly
2600 * important for named mutexes as they are shared across
2601 * processes, see bug 74680.) This will happen when the
2602 * thread exits, but if it's not running in a subthread it
2603 * won't exit in time.
2605 /* Using non-w32 API is a nasty kludge, but I couldn't find
2606 * anything in the documentation that would let me do this
2607 * here yet still be safe to call on windows.
2609 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2613 /* This stuff needs more testing, it seems one of these
2614 * critical sections can be locked when mono_thread_cleanup is
2617 DeleteCriticalSection (&threads_mutex);
2618 DeleteCriticalSection (&interlocked_mutex);
2619 DeleteCriticalSection (&contexts_mutex);
2620 DeleteCriticalSection (&delayed_free_table_mutex);
2621 DeleteCriticalSection (&small_id_mutex);
2622 CloseHandle (background_change_event);
2625 mono_native_tls_free (current_object_key);
2629 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2631 mono_thread_cleanup_fn = func;
2635 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2637 thread->internal_thread->manage_callback = func;
2640 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2642 mono_thread_notify_pending_exc_fn = func;
2646 static void print_tids (gpointer key, gpointer value, gpointer user)
2648 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2649 * sizeof(uint) and a cast to uint would overflow
2651 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2652 * print this as a pointer.
2654 g_message ("Waiting for: %p", key);
2659 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2660 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2664 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2668 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2670 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2672 if(ret==WAIT_FAILED) {
2673 /* See the comment in build_wait_tids() */
2674 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2678 for(i=0; i<wait->num; i++)
2679 CloseHandle (wait->handles[i]);
2681 if (ret == WAIT_TIMEOUT)
2684 for(i=0; i<wait->num; i++) {
2685 gsize tid = wait->threads[i]->tid;
2687 mono_threads_lock ();
2688 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2689 /* This thread must have been killed, because
2690 * it hasn't cleaned itself up. (It's just
2691 * possible that the thread exited before the
2692 * parent thread had a chance to store the
2693 * handle, and now there is another pointer to
2694 * the already-exited thread stored. In this
2695 * case, we'll just get two
2696 * mono_profiler_thread_end() calls for the
2700 mono_threads_unlock ();
2701 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2702 thread_cleanup (wait->threads[i]);
2704 mono_threads_unlock ();
2709 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2711 guint32 i, ret, count;
2713 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2715 /* Add the thread state change event, so it wakes up if a thread changes
2716 * to background mode.
2719 if (count < MAXIMUM_WAIT_OBJECTS) {
2720 wait->handles [count] = background_change_event;
2724 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2726 if(ret==WAIT_FAILED) {
2727 /* See the comment in build_wait_tids() */
2728 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2732 for(i=0; i<wait->num; i++)
2733 CloseHandle (wait->handles[i]);
2735 if (ret == WAIT_TIMEOUT)
2738 if (ret < wait->num) {
2739 gsize tid = wait->threads[ret]->tid;
2740 mono_threads_lock ();
2741 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2742 /* See comment in wait_for_tids about thread cleanup */
2743 mono_threads_unlock ();
2744 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2745 thread_cleanup (wait->threads [ret]);
2747 mono_threads_unlock ();
2751 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2753 struct wait_data *wait=(struct wait_data *)user;
2755 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2757 MonoInternalThread *thread=(MonoInternalThread *)value;
2759 /* Ignore background threads, we abort them later */
2760 /* Do not lock here since it is not needed and the caller holds threads_lock */
2761 if (thread->state & ThreadState_Background) {
2762 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2763 return; /* just leave, ignore */
2766 if (mono_gc_is_finalizer_internal_thread (thread)) {
2767 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2771 if (thread == mono_thread_internal_current ()) {
2772 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2776 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2777 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2781 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2782 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2786 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2787 if (handle == NULL) {
2788 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2792 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2793 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2794 wait->handles[wait->num]=handle;
2795 wait->threads[wait->num]=thread;
2798 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2800 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2805 /* Just ignore the rest, we can't do anything with
2812 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2814 struct wait_data *wait=(struct wait_data *)user;
2815 gsize self = GetCurrentThreadId ();
2816 MonoInternalThread *thread = value;
2819 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2822 /* The finalizer thread is not a background thread */
2823 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2824 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2826 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2830 /* printf ("A: %d\n", wait->num); */
2831 wait->handles[wait->num]=thread->handle;
2832 wait->threads[wait->num]=thread;
2835 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2836 mono_thread_internal_stop (thread);
2840 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2844 * mono_threads_set_shutting_down:
2846 * Is called by a thread that wants to shut down Mono. If the runtime is already
2847 * shutting down, the calling thread is suspended/stopped, and this function never
2851 mono_threads_set_shutting_down (void)
2853 MonoInternalThread *current_thread = mono_thread_internal_current ();
2855 mono_threads_lock ();
2857 if (shutting_down) {
2858 mono_threads_unlock ();
2860 /* Make sure we're properly suspended/stopped */
2862 EnterCriticalSection (current_thread->synch_cs);
2864 if ((current_thread->state & ThreadState_SuspendRequested) ||
2865 (current_thread->state & ThreadState_AbortRequested) ||
2866 (current_thread->state & ThreadState_StopRequested)) {
2867 LeaveCriticalSection (current_thread->synch_cs);
2868 mono_thread_execute_interruption (current_thread);
2870 current_thread->state |= ThreadState_Stopped;
2871 LeaveCriticalSection (current_thread->synch_cs);
2874 /*since we're killing the thread, unset the current domain.*/
2875 mono_domain_unset ();
2877 /* Wake up other threads potentially waiting for us */
2880 shutting_down = TRUE;
2882 /* Not really a background state change, but this will
2883 * interrupt the main thread if it is waiting for all
2884 * the other threads.
2886 SetEvent (background_change_event);
2888 mono_threads_unlock ();
2893 * mono_threads_is_shutting_down:
2895 * Returns whether a thread has commenced shutdown of Mono. Note that
2896 * if the function returns FALSE the caller must not assume that
2897 * shutdown is not in progress, because the situation might have
2898 * changed since the function returned. For that reason this function
2899 * is of very limited utility.
2902 mono_threads_is_shutting_down (void)
2904 return shutting_down;
2907 void mono_thread_manage (void)
2909 struct wait_data wait_data;
2910 struct wait_data *wait = &wait_data;
2912 memset (wait, 0, sizeof (struct wait_data));
2913 /* join each thread that's still running */
2914 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2916 mono_threads_lock ();
2918 THREAD_DEBUG (g_message("%s: No threads", __func__));
2919 mono_threads_unlock ();
2922 mono_threads_unlock ();
2925 mono_threads_lock ();
2926 if (shutting_down) {
2927 /* somebody else is shutting down */
2928 mono_threads_unlock ();
2931 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2932 mono_g_hash_table_foreach (threads, print_tids, NULL));
2934 ResetEvent (background_change_event);
2936 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2937 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2938 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2939 mono_threads_unlock ();
2941 /* Something to wait for */
2942 wait_for_tids_or_state_change (wait, INFINITE);
2944 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2945 } while(wait->num>0);
2947 mono_runtime_shutdown ();
2949 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2950 mono_thread_pool_cleanup ();
2953 * Remove everything but the finalizer thread and self.
2954 * Also abort all the background threads
2957 mono_threads_lock ();
2960 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2961 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2962 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2964 mono_threads_unlock ();
2966 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2968 /* Something to wait for */
2969 wait_for_tids (wait, INFINITE);
2971 } while (wait->num > 0);
2974 * give the subthreads a chance to really quit (this is mainly needed
2975 * to get correct user and system times from getrusage/wait/time(1)).
2976 * This could be removed if we avoid pthread_detach() and use pthread_join().
2983 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2985 MonoInternalThread *thread=(MonoInternalThread *)value;
2987 if(thread->tid != (gsize)user) {
2988 /*TerminateThread (thread->handle, -1);*/
2992 void mono_thread_abort_all_other_threads (void)
2994 gsize self = GetCurrentThreadId ();
2996 mono_threads_lock ();
2997 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2998 mono_g_hash_table_size (threads));
2999 mono_g_hash_table_foreach (threads, print_tids, NULL));
3001 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3003 mono_threads_unlock ();
3007 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3009 MonoInternalThread *thread = (MonoInternalThread*)value;
3010 struct wait_data *wait = (struct wait_data*)user_data;
3014 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3016 * This needs no locking.
3018 if ((thread->state & ThreadState_Suspended) != 0 ||
3019 (thread->state & ThreadState_Stopped) != 0)
3022 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3023 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3027 wait->handles [wait->num] = handle;
3028 wait->threads [wait->num] = thread;
3034 * mono_thread_suspend_all_other_threads:
3036 * Suspend all managed threads except the finalizer thread and this thread. It is
3037 * not possible to resume them later.
3039 void mono_thread_suspend_all_other_threads (void)
3041 struct wait_data wait_data;
3042 struct wait_data *wait = &wait_data;
3044 gsize self = GetCurrentThreadId ();
3046 guint32 eventidx = 0;
3047 gboolean starting, finished;
3049 memset (wait, 0, sizeof (struct wait_data));
3051 * The other threads could be in an arbitrary state at this point, i.e.
3052 * they could be starting up, shutting down etc. This means that there could be
3053 * threads which are not even in the threads hash table yet.
3057 * First we set a barrier which will be checked by all threads before they
3058 * are added to the threads hash table, and they will exit if the flag is set.
3059 * This ensures that no threads could be added to the hash later.
3060 * We will use shutting_down as the barrier for now.
3062 g_assert (shutting_down);
3065 * We make multiple calls to WaitForMultipleObjects since:
3066 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3067 * - some threads could exit without becoming suspended
3072 * Make a copy of the hashtable since we can't do anything with
3073 * threads while threads_mutex is held.
3076 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3077 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3078 mono_threads_lock ();
3079 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3080 mono_threads_unlock ();
3082 events = g_new0 (gpointer, wait->num);
3084 /* Get the suspended events that we'll be waiting for */
3085 for (i = 0; i < wait->num; ++i) {
3086 MonoInternalThread *thread = wait->threads [i];
3087 gboolean signal_suspend = FALSE;
3089 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3090 //CloseHandle (wait->handles [i]);
3091 wait->threads [i] = NULL; /* ignore this thread in next loop */
3095 ensure_synch_cs_set (thread);
3097 EnterCriticalSection (thread->synch_cs);
3099 if (thread->suspended_event == NULL) {
3100 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3101 if (thread->suspended_event == NULL) {
3102 /* Forget this one and go on to the next */
3103 LeaveCriticalSection (thread->synch_cs);
3108 if ((thread->state & ThreadState_Suspended) != 0 ||
3109 (thread->state & ThreadState_StopRequested) != 0 ||
3110 (thread->state & ThreadState_Stopped) != 0) {
3111 LeaveCriticalSection (thread->synch_cs);
3112 CloseHandle (wait->handles [i]);
3113 wait->threads [i] = NULL; /* ignore this thread in next loop */
3117 if ((thread->state & ThreadState_SuspendRequested) == 0)
3118 signal_suspend = TRUE;
3120 events [eventidx++] = thread->suspended_event;
3122 /* Convert abort requests into suspend requests */
3123 if ((thread->state & ThreadState_AbortRequested) != 0)
3124 thread->state &= ~ThreadState_AbortRequested;
3126 thread->state |= ThreadState_SuspendRequested;
3128 LeaveCriticalSection (thread->synch_cs);
3130 /* Signal the thread to suspend */
3131 if (mono_thread_info_new_interrupt_enabled ())
3132 suspend_thread_internal (thread, TRUE);
3133 else if (signal_suspend)
3134 signal_thread_state_change (thread);
3137 /*Only wait on the suspend event if we are using the old path */
3138 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3139 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3140 for (i = 0; i < wait->num; ++i) {
3141 MonoInternalThread *thread = wait->threads [i];
3146 ensure_synch_cs_set (thread);
3148 EnterCriticalSection (thread->synch_cs);
3149 if ((thread->state & ThreadState_Suspended) != 0) {
3150 CloseHandle (thread->suspended_event);
3151 thread->suspended_event = NULL;
3153 LeaveCriticalSection (thread->synch_cs);
3157 if (eventidx <= 0) {
3159 * If there are threads which are starting up, we wait until they
3160 * are suspended when they try to register in the threads hash.
3161 * This is guaranteed to finish, since the threads which can create new
3162 * threads get suspended after a while.
3163 * FIXME: The finalizer thread can still create new threads.
3165 mono_threads_lock ();
3166 if (threads_starting_up)
3167 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3170 mono_threads_unlock ();
3182 collect_threads (gpointer key, gpointer value, gpointer user_data)
3184 MonoInternalThread *thread = (MonoInternalThread*)value;
3185 struct wait_data *wait = (struct wait_data*)user_data;
3188 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3189 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3193 wait->handles [wait->num] = handle;
3194 wait->threads [wait->num] = thread;
3199 static gboolean thread_dump_requested;
3201 static G_GNUC_UNUSED gboolean
3202 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3204 GString *p = (GString*)data;
3205 MonoMethod *method = NULL;
3207 method = frame->ji->method;
3210 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3211 g_string_append_printf (p, " %s\n", location);
3214 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3220 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3222 GString* text = g_string_new (0);
3224 GError *error = NULL;
3227 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3229 g_string_append_printf (text, "\n\"%s\"", name);
3232 else if (thread->threadpool_thread)
3233 g_string_append (text, "\n\"<threadpool thread>\"");
3235 g_string_append (text, "\n\"<unnamed thread>\"");
3238 /* This no longer works with remote unwinding */
3240 wapi_desc = wapi_current_thread_desc ();
3241 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3246 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3247 mono_thread_info_resume (mono_thread_info_get_tid (info));
3249 fprintf (stdout, "%s", text->str);
3251 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3252 OutputDebugStringA(text->str);
3255 g_string_free (text, TRUE);
3260 dump_thread (gpointer key, gpointer value, gpointer user)
3262 MonoInternalThread *thread = (MonoInternalThread *)value;
3263 MonoThreadInfo *info;
3265 if (thread == mono_thread_internal_current ())
3269 FIXME This still can hang if we stop a thread during malloc.
3270 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3271 that takes a callback and runs it with the target suspended.
3272 We probably should loop a bit around trying to get it to either managed code
3275 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3280 print_thread_dump (thread, info);
3284 mono_threads_perform_thread_dump (void)
3286 if (!thread_dump_requested)
3289 printf ("Full thread dump:\n");
3292 * Make a copy of the hashtable since we can't do anything with
3293 * threads while threads_mutex is held.
3295 mono_threads_lock ();
3296 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3297 mono_threads_unlock ();
3299 thread_dump_requested = FALSE;
3303 * mono_threads_request_thread_dump:
3305 * Ask all threads except the current to print their stacktrace to stdout.
3308 mono_threads_request_thread_dump (void)
3310 struct wait_data wait_data;
3311 struct wait_data *wait = &wait_data;
3314 /*The new thread dump code runs out of the finalizer thread. */
3315 if (mono_thread_info_new_interrupt_enabled ()) {
3316 thread_dump_requested = TRUE;
3317 mono_gc_finalize_notify ();
3322 memset (wait, 0, sizeof (struct wait_data));
3325 * Make a copy of the hashtable since we can't do anything with
3326 * threads while threads_mutex is held.
3328 mono_threads_lock ();
3329 mono_g_hash_table_foreach (threads, collect_threads, wait);
3330 mono_threads_unlock ();
3332 for (i = 0; i < wait->num; ++i) {
3333 MonoInternalThread *thread = wait->threads [i];
3335 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3336 (thread != mono_thread_internal_current ()) &&
3337 !thread->thread_dump_requested) {
3338 thread->thread_dump_requested = TRUE;
3340 signal_thread_state_change (thread);
3343 CloseHandle (wait->handles [i]);
3349 gint allocated; /* +1 so that refs [allocated] == NULL */
3353 typedef struct ref_stack RefStack;
3356 ref_stack_new (gint initial_size)
3360 initial_size = MAX (initial_size, 16) + 1;
3361 rs = g_new0 (RefStack, 1);
3362 rs->refs = g_new0 (gpointer, initial_size);
3363 rs->allocated = initial_size;
3368 ref_stack_destroy (gpointer ptr)
3379 ref_stack_push (RefStack *rs, gpointer ptr)
3381 g_assert (rs != NULL);
3383 if (rs->bottom >= rs->allocated) {
3384 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3385 rs->allocated <<= 1;
3386 rs->refs [rs->allocated] = NULL;
3388 rs->refs [rs->bottom++] = ptr;
3392 ref_stack_pop (RefStack *rs)
3394 if (rs == NULL || rs->bottom == 0)
3398 rs->refs [rs->bottom] = NULL;
3402 ref_stack_find (RefStack *rs, gpointer ptr)
3409 for (refs = rs->refs; refs && *refs; refs++) {
3417 * mono_thread_push_appdomain_ref:
3419 * Register that the current thread may have references to objects in domain
3420 * @domain on its stack. Each call to this function should be paired with a
3421 * call to pop_appdomain_ref.
3424 mono_thread_push_appdomain_ref (MonoDomain *domain)
3426 MonoInternalThread *thread = mono_thread_internal_current ();
3429 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3430 SPIN_LOCK (thread->lock_thread_id);
3431 if (thread->appdomain_refs == NULL)
3432 thread->appdomain_refs = ref_stack_new (16);
3433 ref_stack_push (thread->appdomain_refs, domain);
3434 SPIN_UNLOCK (thread->lock_thread_id);
3439 mono_thread_pop_appdomain_ref (void)
3441 MonoInternalThread *thread = mono_thread_internal_current ();
3444 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3445 SPIN_LOCK (thread->lock_thread_id);
3446 ref_stack_pop (thread->appdomain_refs);
3447 SPIN_UNLOCK (thread->lock_thread_id);
3452 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3455 SPIN_LOCK (thread->lock_thread_id);
3456 res = ref_stack_find (thread->appdomain_refs, domain);
3457 SPIN_UNLOCK (thread->lock_thread_id);
3462 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3464 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3467 typedef struct abort_appdomain_data {
3468 struct wait_data wait;
3470 } abort_appdomain_data;
3473 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3475 MonoInternalThread *thread = (MonoInternalThread*)value;
3476 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3477 MonoDomain *domain = data->domain;
3479 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3480 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3482 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3483 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3486 data->wait.handles [data->wait.num] = handle;
3487 data->wait.threads [data->wait.num] = thread;
3490 /* Just ignore the rest, we can't do anything with
3498 * mono_threads_abort_appdomain_threads:
3500 * Abort threads which has references to the given appdomain.
3503 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3505 #ifdef __native_client__
3509 abort_appdomain_data user_data;
3511 int orig_timeout = timeout;
3514 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3516 start_time = mono_msec_ticks ();
3518 mono_threads_lock ();
3520 user_data.domain = domain;
3521 user_data.wait.num = 0;
3522 /* This shouldn't take any locks */
3523 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3524 mono_threads_unlock ();
3526 if (user_data.wait.num > 0) {
3527 /* Abort the threads outside the threads lock */
3528 for (i = 0; i < user_data.wait.num; ++i)
3529 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3532 * We should wait for the threads either to abort, or to leave the
3533 * domain. We can't do the latter, so we wait with a timeout.
3535 wait_for_tids (&user_data.wait, 100);
3538 /* Update remaining time */
3539 timeout -= mono_msec_ticks () - start_time;
3540 start_time = mono_msec_ticks ();
3542 if (orig_timeout != -1 && timeout < 0)
3545 while (user_data.wait.num > 0);
3547 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3553 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3555 MonoInternalThread *thread = (MonoInternalThread*)value;
3556 MonoDomain *domain = (MonoDomain*)user_data;
3559 /* No locking needed here */
3560 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3562 if (thread->cached_culture_info) {
3563 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3564 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3565 if (obj && obj->vtable->domain == domain)
3566 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3572 * mono_threads_clear_cached_culture:
3574 * Clear the cached_current_culture from all threads if it is in the
3578 mono_threads_clear_cached_culture (MonoDomain *domain)
3580 mono_threads_lock ();
3581 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3582 mono_threads_unlock ();
3586 * mono_thread_get_undeniable_exception:
3588 * Return an exception which needs to be raised when leaving a catch clause.
3589 * This is used for undeniable exception propagation.
3592 mono_thread_get_undeniable_exception (void)
3594 MonoInternalThread *thread = mono_thread_internal_current ();
3596 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3598 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3599 * exception if the thread no longer references a dying appdomain.
3601 thread->abort_exc->trace_ips = NULL;
3602 thread->abort_exc->stack_trace = NULL;
3603 return thread->abort_exc;
3609 #if MONO_SMALL_CONFIG
3610 #define NUM_STATIC_DATA_IDX 4
3611 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3615 #define NUM_STATIC_DATA_IDX 8
3616 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3617 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3621 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3624 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3627 gpointer *static_data = addr;
3628 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3631 if (!static_data [i])
3633 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3634 ptr = static_data [i];
3635 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3636 uintptr_t bmap = static_reference_bitmaps [i][j];
3639 if ((bmap & 1) && *p) {
3650 * mono_alloc_static_data
3652 * Allocate memory blocks for storing threads or context static data
3655 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3657 guint idx = (offset >> 24) - 1;
3660 gpointer* static_data = *static_data_ptr;
3662 static void* tls_desc = NULL;
3663 if (mono_gc_user_markers_supported () && !tls_desc)
3664 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3665 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3666 *static_data_ptr = static_data;
3667 static_data [0] = static_data;
3670 for (i = 1; i <= idx; ++i) {
3671 if (static_data [i])
3673 if (mono_gc_user_markers_supported () && threadlocal)
3674 static_data [i] = g_malloc0 (static_data_size [i]);
3676 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3681 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3684 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3685 if (!static_data [i])
3687 if (mono_gc_user_markers_supported () && threadlocal)
3688 g_free (static_data [i]);
3690 mono_gc_free_fixed (static_data [i]);
3692 mono_gc_free_fixed (static_data);
3696 * mono_init_static_data_info
3698 * Initializes static data counters
3700 static void mono_init_static_data_info (StaticDataInfo *static_data)
3702 static_data->idx = 0;
3703 static_data->offset = 0;
3704 static_data->freelist = NULL;
3708 * mono_alloc_static_data_slot
3710 * Generates an offset for static data. static_data contains the counters
3711 * used to generate it.
3714 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3718 if (!static_data->idx && !static_data->offset) {
3720 * we use the first chunk of the first allocation also as
3721 * an array for the rest of the data
3723 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3725 static_data->offset += align - 1;
3726 static_data->offset &= ~(align - 1);
3727 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3728 static_data->idx ++;
3729 g_assert (size <= static_data_size [static_data->idx]);
3730 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3731 static_data->offset = 0;
3733 offset = static_data->offset | ((static_data->idx + 1) << 24);
3734 static_data->offset += size;
3739 * ensure thread static fields already allocated are valid for thread
3740 * This function is called when a thread is created or on thread attach.
3743 thread_adjust_static_data (MonoInternalThread *thread)
3747 mono_threads_lock ();
3748 if (thread_static_info.offset || thread_static_info.idx > 0) {
3749 /* get the current allocated size */
3750 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3751 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3753 mono_threads_unlock ();
3757 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3759 MonoInternalThread *thread = value;
3760 guint32 offset = GPOINTER_TO_UINT (user);
3762 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3765 static MonoThreadDomainTls*
3766 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3768 MonoThreadDomainTls* prev = NULL;
3769 MonoThreadDomainTls* tmp = static_data->freelist;
3771 if (tmp->size == size) {
3773 prev->next = tmp->next;
3775 static_data->freelist = tmp->next;
3784 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3787 int idx = (offset >> 24) - 1;
3789 if (!static_reference_bitmaps [idx])
3790 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3791 rb = static_reference_bitmaps [idx];
3793 offset /= sizeof (gpointer);
3794 /* offset is now the bitmap offset */
3795 for (i = 0; i < numbits; ++i) {
3796 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3797 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3802 clear_reference_bitmap (guint32 offset, guint32 size)
3804 int idx = (offset >> 24) - 1;
3806 rb = static_reference_bitmaps [idx];
3808 offset /= sizeof (gpointer);
3809 size /= sizeof (gpointer);
3811 /* offset is now the bitmap offset */
3812 for (; offset < size; ++offset)
3813 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3817 * The offset for a special static variable is composed of three parts:
3818 * a bit that indicates the type of static data (0:thread, 1:context),
3819 * an index in the array of chunks of memory for the thread (thread->static_data)
3820 * and an offset in that chunk of mem. This allows allocating less memory in the
3825 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3828 if (static_type == SPECIAL_STATIC_THREAD) {
3829 MonoThreadDomainTls *item;
3830 mono_threads_lock ();
3831 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3832 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3834 offset = item->offset;
3837 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3839 update_tls_reference_bitmap (offset, bitmap, numbits);
3840 /* This can be called during startup */
3841 if (threads != NULL)
3842 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3843 mono_threads_unlock ();
3845 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3846 mono_contexts_lock ();
3847 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3848 mono_contexts_unlock ();
3849 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3855 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3857 /* The high bit means either thread (0) or static (1) data. */
3859 guint32 static_type = (offset & 0x80000000);
3862 offset &= 0x7fffffff;
3863 idx = (offset >> 24) - 1;
3865 if (static_type == 0) {
3866 return get_thread_static_data (thread, offset);
3868 /* Allocate static data block under demand, since we don't have a list
3871 MonoAppContext *context = mono_context_get ();
3872 if (!context->static_data || !context->static_data [idx]) {
3873 mono_contexts_lock ();
3874 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3875 mono_contexts_unlock ();
3877 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3882 mono_get_special_static_data (guint32 offset)
3884 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3893 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3895 MonoInternalThread *thread = value;
3896 TlsOffsetSize *data = user;
3897 int idx = (data->offset >> 24) - 1;
3900 if (!thread->static_data || !thread->static_data [idx])
3902 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3903 mono_gc_bzero (ptr, data->size);
3907 do_free_special_slot (guint32 offset, guint32 size)
3909 guint32 static_type = (offset & 0x80000000);
3910 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3911 if (static_type == 0) {
3913 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3914 data.offset = offset & 0x7fffffff;
3916 clear_reference_bitmap (data.offset, data.size);
3917 if (threads != NULL)
3918 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3919 item->offset = offset;
3922 if (!mono_runtime_is_shutting_down ()) {
3923 item->next = thread_static_info.freelist;
3924 thread_static_info.freelist = item;
3926 /* We could be called during shutdown after mono_thread_cleanup () is called */
3930 /* FIXME: free context static data as well */
3935 do_free_special (gpointer key, gpointer value, gpointer data)
3937 MonoClassField *field = key;
3938 guint32 offset = GPOINTER_TO_UINT (value);
3941 size = mono_type_size (field->type, &align);
3942 do_free_special_slot (offset, size);
3946 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3948 mono_threads_lock ();
3949 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3950 mono_threads_unlock ();
3954 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3956 mono_threads_lock ();
3957 do_free_special_slot (offset, size);
3958 mono_threads_unlock ();
3962 * allocates room in the thread local area for storing an instance of the struct type
3963 * the allocation is kept track of in domain->tlsrec_list.
3966 mono_thread_alloc_tls (MonoReflectionType *type)
3968 MonoDomain *domain = mono_domain_get ();
3970 MonoTlsDataRecord *tlsrec;
3973 gsize default_bitmap [4] = {0};
3974 uint32_t tls_offset;
3978 klass = mono_class_from_mono_type (type->type);
3979 /* TlsDatum is a struct, so we subtract the object header size offset */
3980 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3981 size = mono_type_size (type->type, &align);
3982 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3983 if (bitmap != default_bitmap)
3985 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3986 tlsrec->tls_offset = tls_offset;
3987 tlsrec->size = size;
3988 mono_domain_lock (domain);
3989 tlsrec->next = domain->tlsrec_list;
3990 domain->tlsrec_list = tlsrec;
3991 mono_domain_unlock (domain);
3996 mono_thread_destroy_tls (uint32_t tls_offset)
3998 MonoTlsDataRecord *prev = NULL;
3999 MonoTlsDataRecord *cur;
4001 MonoDomain *domain = mono_domain_get ();
4002 mono_domain_lock (domain);
4003 cur = domain->tlsrec_list;
4005 if (cur->tls_offset == tls_offset) {
4007 prev->next = cur->next;
4009 domain->tlsrec_list = cur->next;
4017 mono_domain_unlock (domain);
4019 mono_special_static_data_free_slot (tls_offset, size);
4023 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4026 mono_thread_destroy_domain_tls (MonoDomain *domain)
4028 while (domain->tlsrec_list)
4029 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4032 static MonoClassField *local_slots = NULL;
4035 /* local tls data to get locals_slot from a thread */
4038 /* index in the locals_slot array */
4043 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4045 LocalSlotID *sid = user_data;
4046 MonoInternalThread *thread = (MonoInternalThread*)value;
4047 MonoArray *slots_array;
4049 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4050 * it is for the right domain, so we need to check if it is allocated an initialized
4051 * for the current thread.
4053 /*g_print ("handling thread %p\n", thread);*/
4054 if (!thread->static_data || !thread->static_data [sid->idx])
4056 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4057 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4059 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4063 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4071 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4073 g_warning ("local_slots field not found in Thread class");
4077 domain = mono_domain_get ();
4078 mono_domain_lock (domain);
4079 if (domain->special_static_fields)
4080 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4081 mono_domain_unlock (domain);
4084 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4085 sid.offset = GPOINTER_TO_UINT (addr);
4086 sid.offset &= 0x7fffffff;
4087 sid.idx = (sid.offset >> 24) - 1;
4088 mono_threads_lock ();
4089 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4090 mono_threads_unlock ();
4092 /* FIXME: clear the slot for MonoAppContexts, too */
4097 static void CALLBACK dummy_apc (ULONG_PTR param)
4101 static guint32 dummy_apc (gpointer param)
4108 * mono_thread_execute_interruption
4110 * Performs the operation that the requested thread state requires (abort,
4113 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4115 ensure_synch_cs_set (thread);
4117 EnterCriticalSection (thread->synch_cs);
4119 /* MonoThread::interruption_requested can only be changed with atomics */
4120 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4121 /* this will consume pending APC calls */
4122 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4123 InterlockedDecrement (&thread_interruption_requested);
4125 /* Clear the interrupted flag of the thread so it can wait again */
4126 wapi_clear_interruption ();
4130 if ((thread->state & ThreadState_AbortRequested) != 0) {
4131 LeaveCriticalSection (thread->synch_cs);
4132 if (thread->abort_exc == NULL) {
4134 * This might be racy, but it has to be called outside the lock
4135 * since it calls managed code.
4137 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4139 return thread->abort_exc;
4141 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4142 self_suspend_internal (thread);
4145 else if ((thread->state & ThreadState_StopRequested) != 0) {
4146 /* FIXME: do this through the JIT? */
4148 LeaveCriticalSection (thread->synch_cs);
4150 mono_thread_exit ();
4152 } else if (thread->pending_exception) {
4155 exc = thread->pending_exception;
4156 thread->pending_exception = NULL;
4158 LeaveCriticalSection (thread->synch_cs);
4160 } else if (thread->thread_interrupt_requested) {
4162 thread->thread_interrupt_requested = FALSE;
4163 LeaveCriticalSection (thread->synch_cs);
4165 return(mono_get_exception_thread_interrupted ());
4168 LeaveCriticalSection (thread->synch_cs);
4174 * mono_thread_request_interruption
4176 * A signal handler can call this method to request the interruption of a
4177 * thread. The result of the interruption will depend on the current state of
4178 * the thread. If the result is an exception that needs to be throw, it is
4179 * provided as return value.
4182 mono_thread_request_interruption (gboolean running_managed)
4184 MonoInternalThread *thread = mono_thread_internal_current ();
4186 /* The thread may already be stopping */
4191 if (thread->interrupt_on_stop &&
4192 thread->state & ThreadState_StopRequested &&
4193 thread->state & ThreadState_Background)
4197 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4199 InterlockedIncrement (&thread_interruption_requested);
4201 if (!running_managed || is_running_protected_wrapper ()) {
4202 /* Can't stop while in unmanaged code. Increase the global interruption
4203 request count. When exiting the unmanaged method the count will be
4204 checked and the thread will be interrupted. */
4207 if (mono_thread_notify_pending_exc_fn && !running_managed)
4208 /* The JIT will notify the thread about the interruption */
4209 /* This shouldn't take any locks */
4210 mono_thread_notify_pending_exc_fn ();
4212 /* this will awake the thread if it is in WaitForSingleObject
4214 /* Our implementation of this function ignores the func argument */
4215 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4219 return mono_thread_execute_interruption (thread);
4223 /*This function should be called by a thread after it has exited all of
4224 * its handle blocks at interruption time.*/
4226 mono_thread_resume_interruption (void)
4228 MonoInternalThread *thread = mono_thread_internal_current ();
4229 gboolean still_aborting;
4231 /* The thread may already be stopping */
4235 ensure_synch_cs_set (thread);
4236 EnterCriticalSection (thread->synch_cs);
4237 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4238 LeaveCriticalSection (thread->synch_cs);
4240 /*This can happen if the protected block called Thread::ResetAbort*/
4241 if (!still_aborting)
4244 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4246 InterlockedIncrement (&thread_interruption_requested);
4249 wapi_self_interrupt ();
4251 return mono_thread_execute_interruption (thread);
4254 gboolean mono_thread_interruption_requested ()
4256 if (thread_interruption_requested) {
4257 MonoInternalThread *thread = mono_thread_internal_current ();
4258 /* The thread may already be stopping */
4260 return (thread->interruption_requested);
4265 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4267 MonoInternalThread *thread = mono_thread_internal_current ();
4269 /* The thread may already be stopping */
4273 mono_debugger_check_interruption ();
4275 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4276 MonoException* exc = mono_thread_execute_interruption (thread);
4277 if (exc) mono_raise_exception (exc);
4282 * Performs the interruption of the current thread, if one has been requested,
4283 * and the thread is not running a protected wrapper.
4285 void mono_thread_interruption_checkpoint ()
4287 mono_thread_interruption_checkpoint_request (FALSE);
4291 * Performs the interruption of the current thread, if one has been requested.
4293 void mono_thread_force_interruption_checkpoint ()
4295 mono_thread_interruption_checkpoint_request (TRUE);
4299 * mono_thread_get_and_clear_pending_exception:
4301 * Return any pending exceptions for the current thread and clear it as a side effect.
4304 mono_thread_get_and_clear_pending_exception (void)
4306 MonoInternalThread *thread = mono_thread_internal_current ();
4308 /* The thread may already be stopping */
4312 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4313 return mono_thread_execute_interruption (thread);
4316 if (thread->pending_exception) {
4317 MonoException *exc = thread->pending_exception;
4319 thread->pending_exception = NULL;
4327 * mono_set_pending_exception:
4329 * Set the pending exception of the current thread to EXC.
4330 * The exception will be thrown when execution returns to managed code.
4333 mono_set_pending_exception (MonoException *exc)
4335 MonoInternalThread *thread = mono_thread_internal_current ();
4337 /* The thread may already be stopping */
4341 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4343 mono_thread_request_interruption (FALSE);
4347 * mono_thread_interruption_request_flag:
4349 * Returns the address of a flag that will be non-zero if an interruption has
4350 * been requested for a thread. The thread to interrupt may not be the current
4351 * thread, so an additional call to mono_thread_interruption_requested() or
4352 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4355 gint32* mono_thread_interruption_request_flag ()
4357 return &thread_interruption_requested;
4361 mono_thread_init_apartment_state (void)
4364 MonoInternalThread* thread = mono_thread_internal_current ();
4366 /* Positive return value indicates success, either
4367 * S_OK if this is first CoInitialize call, or
4368 * S_FALSE if CoInitialize already called, but with same
4369 * threading model. A negative value indicates failure,
4370 * probably due to trying to change the threading model.
4372 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4373 ? COINIT_APARTMENTTHREADED
4374 : COINIT_MULTITHREADED) < 0) {
4375 thread->apartment_state = ThreadApartmentState_Unknown;
4381 mono_thread_cleanup_apartment_state (void)
4384 MonoInternalThread* thread = mono_thread_internal_current ();
4386 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4393 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4395 ensure_synch_cs_set (thread);
4397 EnterCriticalSection (thread->synch_cs);
4398 thread->state |= state;
4399 LeaveCriticalSection (thread->synch_cs);
4403 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4405 ensure_synch_cs_set (thread);
4407 EnterCriticalSection (thread->synch_cs);
4408 thread->state &= ~state;
4409 LeaveCriticalSection (thread->synch_cs);
4413 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4415 gboolean ret = FALSE;
4417 ensure_synch_cs_set (thread);
4419 EnterCriticalSection (thread->synch_cs);
4421 if ((thread->state & test) != 0) {
4425 LeaveCriticalSection (thread->synch_cs);
4430 //static MonoClassField *execution_context_field;
4433 get_execution_context_addr (void)
4435 MonoDomain *domain = mono_domain_get ();
4436 guint32 offset = domain->execution_context_field_offset;
4439 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4442 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4444 mono_domain_lock (domain);
4445 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4446 mono_domain_unlock (domain);
4449 domain->execution_context_field_offset = offset;
4452 return (MonoObject**) mono_get_special_static_data (offset);
4456 mono_thread_get_execution_context (void)
4458 return *get_execution_context_addr ();
4462 mono_thread_set_execution_context (MonoObject *ec)
4464 *get_execution_context_addr () = ec;
4467 static gboolean has_tls_get = FALSE;
4470 mono_runtime_set_has_tls_get (gboolean val)
4476 mono_runtime_has_tls_get (void)
4482 mono_thread_kill (MonoInternalThread *thread, int signal)
4484 #ifdef __native_client__
4485 /* Workaround pthread_kill abort() in NaCl glibc. */
4489 /* Win32 uses QueueUserAPC and callers of this are guarded */
4490 g_assert_not_reached ();
4492 # ifdef PTHREAD_POINTER_ID
4493 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4495 # ifdef PLATFORM_ANDROID
4496 if (thread->android_tid != 0) {
4498 int old_errno = errno;
4500 ret = tkill ((pid_t) thread->android_tid, signal);
4509 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4511 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4518 self_interrupt_thread (void *_unused)
4520 MonoThreadInfo *info = mono_thread_info_current ();
4521 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4522 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4523 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4524 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4528 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4532 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4536 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4538 MonoJitInfo **dest = data;
4544 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4546 MonoJitInfo *ji = NULL;
4549 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4554 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4557 MonoThreadInfo *info = NULL;
4558 gboolean protected_wrapper;
4559 gboolean running_managed;
4561 if (!mono_thread_info_new_interrupt_enabled ()) {
4562 signal_thread_state_change (thread);
4567 FIXME this is insanely broken, it doesn't cause interruption to happen
4568 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4570 if (thread == mono_thread_internal_current ()) {
4571 /* Do it synchronously */
4572 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4574 mono_raise_exception (exc);
4576 wapi_interrupt_thread (thread->handle);
4581 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4582 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4586 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4587 mono_thread_info_resume (mono_thread_info_get_tid (info));
4591 /*someone is already interrupting it*/
4592 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4593 mono_thread_info_resume (mono_thread_info_get_tid (info));
4596 InterlockedIncrement (&thread_interruption_requested);
4598 ji = mono_thread_info_get_last_managed (info);
4599 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4600 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4602 if (!protected_wrapper && running_managed) {
4603 /*We are in managed code*/
4604 /*Set the thread to call */
4605 if (install_async_abort)
4606 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4607 mono_thread_info_resume (mono_thread_info_get_tid (info));
4609 gpointer interrupt_handle;
4611 * This will cause waits to be broken.
4612 * It will also prevent the thread from entering a wait, so if the thread returns
4613 * from the wait before it receives the abort signal, it will just spin in the wait
4614 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4618 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4620 mono_thread_info_resume (mono_thread_info_get_tid (info));
4622 wapi_finish_interrupt_thread (interrupt_handle);
4625 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4629 transition_to_suspended (MonoInternalThread *thread)
4631 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4632 g_assert (0); /*FIXME we should not reach this */
4633 /*Make sure we balance the suspend count.*/
4634 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4636 thread->state &= ~ThreadState_SuspendRequested;
4637 thread->state |= ThreadState_Suspended;
4639 LeaveCriticalSection (thread->synch_cs);
4643 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4645 if (!mono_thread_info_new_interrupt_enabled ()) {
4646 signal_thread_state_change (thread);
4650 EnterCriticalSection (thread->synch_cs);
4651 if (thread == mono_thread_internal_current ()) {
4652 transition_to_suspended (thread);
4653 mono_thread_info_self_suspend ();
4655 MonoThreadInfo *info;
4657 gboolean protected_wrapper;
4658 gboolean running_managed;
4660 /*A null info usually means the thread is already dead. */
4661 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4662 LeaveCriticalSection (thread->synch_cs);
4666 ji = mono_thread_info_get_last_managed (info);
4667 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4668 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4670 if (running_managed && !protected_wrapper) {
4671 transition_to_suspended (thread);
4673 gpointer interrupt_handle;
4675 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4676 InterlockedIncrement (&thread_interruption_requested);
4679 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4681 mono_thread_info_resume (mono_thread_info_get_tid (info));
4684 wapi_finish_interrupt_thread (interrupt_handle);
4686 LeaveCriticalSection (thread->synch_cs);
4691 /*This is called with @thread synch_cs held and it must release it*/
4693 self_suspend_internal (MonoInternalThread *thread)
4695 if (!mono_thread_info_new_interrupt_enabled ()) {
4696 thread->state &= ~ThreadState_SuspendRequested;
4697 thread->state |= ThreadState_Suspended;
4698 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4699 if (thread->suspend_event == NULL) {
4700 LeaveCriticalSection (thread->synch_cs);
4703 if (thread->suspended_event)
4704 SetEvent (thread->suspended_event);
4706 LeaveCriticalSection (thread->synch_cs);
4708 if (shutting_down) {
4709 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4714 WaitForSingleObject (thread->suspend_event, INFINITE);
4716 EnterCriticalSection (thread->synch_cs);
4718 CloseHandle (thread->suspend_event);
4719 thread->suspend_event = NULL;
4720 thread->state &= ~ThreadState_Suspended;
4722 /* The thread that requested the resume will have replaced this event
4723 * and will be waiting for it
4725 SetEvent (thread->resume_event);
4727 LeaveCriticalSection (thread->synch_cs);
4731 transition_to_suspended (thread);
4732 mono_thread_info_self_suspend ();
4735 /*This is called with @thread synch_cs held and it must release it*/
4737 resume_thread_internal (MonoInternalThread *thread)
4739 if (!mono_thread_info_new_interrupt_enabled ()) {
4740 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4741 if (thread->resume_event == NULL) {
4742 LeaveCriticalSection (thread->synch_cs);
4746 /* Awake the thread */
4747 SetEvent (thread->suspend_event);
4749 LeaveCriticalSection (thread->synch_cs);
4751 /* Wait for the thread to awake */
4752 WaitForSingleObject (thread->resume_event, INFINITE);
4753 CloseHandle (thread->resume_event);
4754 thread->resume_event = NULL;
4758 LeaveCriticalSection (thread->synch_cs);
4759 /* Awake the thread */
4760 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4762 EnterCriticalSection (thread->synch_cs);
4763 thread->state &= ~ThreadState_Suspended;
4764 LeaveCriticalSection (thread->synch_cs);
4770 * mono_thread_is_foreign:
4771 * @thread: the thread to query
4773 * This function allows one to determine if a thread was created by the mono runtime and has
4774 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4776 * Returns: true if @thread was not created by the runtime.
4779 mono_thread_is_foreign (MonoThread *thread)
4781 MonoThreadInfo *info = thread->internal_thread->thread_info;
4782 return info->runtime_thread == FALSE;