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 MonoInternalThread *thread;
903 MonoThread *current_thread;
904 HANDLE thread_handle;
907 if ((thread = mono_thread_internal_current ())) {
908 if (domain != mono_domain_get ())
909 mono_domain_set (domain, TRUE);
910 /* Already attached */
911 return mono_thread_current ();
914 if (!mono_gc_register_thread (&domain)) {
915 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 ());
918 thread = create_internal_thread_object ();
920 thread_handle = GetCurrentThread ();
921 g_assert (thread_handle);
923 tid=GetCurrentThreadId ();
926 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
927 * refer to the thread from other threads for things like aborting.
929 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
930 THREAD_ALL_ACCESS, TRUE, 0);
932 thread->handle=thread_handle;
934 #ifdef PLATFORM_ANDROID
935 thread->android_tid = (gpointer) gettid ();
937 thread->apartment_state=ThreadApartmentState_Unknown;
938 thread->managed_id = get_next_managed_thread_id ();
939 if (mono_gc_is_moving ()) {
940 thread->thread_pinning_ref = thread;
941 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
944 thread->stack_ptr = &tid;
946 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
947 InitializeCriticalSection (thread->synch_cs);
949 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
951 current_thread = new_thread_with_internal (domain, thread);
953 if (!handle_store (current_thread)) {
954 /* Mono is shutting down, so just wait for the end */
959 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
961 SET_CURRENT_OBJECT (thread);
962 mono_domain_set (domain, TRUE);
964 mono_monitor_init_tls ();
966 thread_adjust_static_data (thread);
968 init_root_domain_thread (thread, current_thread);
969 if (domain != mono_get_root_domain ())
970 set_current_thread_for_domain (domain, thread, current_thread);
973 if (mono_thread_attach_cb) {
977 mono_thread_get_stack_bounds (&staddr, &stsize);
980 mono_thread_attach_cb (tid, &tid);
982 mono_thread_attach_cb (tid, staddr + stsize);
985 // FIXME: Need a separate callback
986 mono_profiler_thread_start (tid);
988 return current_thread;
992 mono_thread_detach (MonoThread *thread)
994 g_return_if_fail (thread != NULL);
996 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
998 mono_profiler_thread_end (thread->internal_thread->tid);
1000 thread_cleanup (thread->internal_thread);
1002 SET_CURRENT_OBJECT (NULL);
1003 mono_domain_unset ();
1005 /* Don't need to CloseHandle this thread, even though we took a
1006 * reference in mono_thread_attach (), because the GC will do it
1007 * when the Thread object is finalised.
1014 MonoInternalThread *thread = mono_thread_internal_current ();
1016 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1018 thread_cleanup (thread);
1019 SET_CURRENT_OBJECT (NULL);
1020 mono_domain_unset ();
1022 /* we could add a callback here for embedders to use. */
1023 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1024 exit (mono_environment_exitcode_get ());
1029 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1031 MonoInternalThread *internal = create_internal_thread_object ();
1033 internal->state = ThreadState_Unstarted;
1034 internal->apartment_state = ThreadApartmentState_Unknown;
1035 internal->managed_id = get_next_managed_thread_id ();
1037 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1040 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
1043 guint32 (*start_func)(void *);
1044 struct StartInfo *start_info;
1047 MonoInternalThread *internal;
1049 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1051 if (!this->internal_thread)
1052 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1053 internal = this->internal_thread;
1055 ensure_synch_cs_set (internal);
1057 EnterCriticalSection (internal->synch_cs);
1059 if ((internal->state & ThreadState_Unstarted) == 0) {
1060 LeaveCriticalSection (internal->synch_cs);
1061 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1065 if ((internal->state & ThreadState_Aborted) != 0) {
1066 LeaveCriticalSection (internal->synch_cs);
1071 /* This is freed in start_wrapper */
1072 start_info = g_new0 (struct StartInfo, 1);
1073 start_info->func = start_func;
1074 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1075 start_info->delegate = start;
1076 start_info->obj = this;
1077 g_assert (this->obj.vtable->domain == mono_domain_get ());
1079 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1080 if (internal->start_notify==NULL) {
1081 LeaveCriticalSection (internal->synch_cs);
1082 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1083 g_free (start_info);
1087 mono_threads_lock ();
1088 register_thread_start_argument (this, start_info);
1089 if (threads_starting_up == NULL) {
1090 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1091 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1093 mono_g_hash_table_insert (threads_starting_up, this, this);
1094 mono_threads_unlock ();
1096 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1097 CREATE_SUSPENDED, &tid);
1099 LeaveCriticalSection (internal->synch_cs);
1100 mono_threads_lock ();
1101 mono_g_hash_table_remove (threads_starting_up, this);
1102 mono_threads_unlock ();
1103 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1107 internal->handle=thread;
1109 if (mono_gc_is_moving ()) {
1110 internal->thread_pinning_ref = internal;
1111 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1115 /* Don't call handle_store() here, delay it to Start.
1116 * We can't join a thread (trying to will just block
1117 * forever) until it actually starts running, so don't
1118 * store the handle till then.
1121 mono_thread_start (this);
1123 internal->state &= ~ThreadState_Unstarted;
1125 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1127 LeaveCriticalSection (internal->synch_cs);
1132 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1134 MONO_ARCH_SAVE_REGS;
1136 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1139 CloseHandle (thread);
1141 if (this->synch_cs) {
1142 CRITICAL_SECTION *synch_cs = this->synch_cs;
1143 this->synch_cs = NULL;
1144 DeleteCriticalSection (synch_cs);
1149 void *name = this->name;
1155 static void mono_thread_start (MonoThread *thread)
1157 MonoInternalThread *internal = thread->internal_thread;
1159 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1161 /* Only store the handle when the thread is about to be
1162 * launched, to avoid the main thread deadlocking while trying
1163 * to clean up a thread that will never be signalled.
1165 if (!handle_store (thread))
1168 ResumeThread (internal->handle);
1170 if(internal->start_notify!=NULL) {
1171 /* Wait for the thread to set up its TLS data etc, so
1172 * theres no potential race condition if someone tries
1173 * to look up the data believing the thread has
1177 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1179 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1180 CloseHandle (internal->start_notify);
1181 internal->start_notify = NULL;
1184 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1187 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1190 MonoInternalThread *thread = mono_thread_internal_current ();
1192 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1194 mono_thread_current_check_pending_interrupt ();
1197 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1199 res = SleepEx(ms,TRUE);
1201 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1203 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1204 MonoException* exc = mono_thread_execute_interruption (thread);
1206 mono_raise_exception (exc);
1218 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1223 ves_icall_System_Threading_Thread_GetDomainID (void)
1225 MONO_ARCH_SAVE_REGS;
1227 return mono_domain_get()->domain_id;
1231 ves_icall_System_Threading_Thread_Yield (void)
1234 return SwitchToThread ();
1236 return sched_yield () == 0;
1241 * mono_thread_get_name:
1243 * Return the name of the thread. NAME_LEN is set to the length of the name.
1244 * Return NULL if the thread has no name. The returned memory is owned by the
1248 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1252 ensure_synch_cs_set (this_obj);
1254 EnterCriticalSection (this_obj->synch_cs);
1256 if (!this_obj->name) {
1260 *name_len = this_obj->name_len;
1261 res = g_new (gunichar2, this_obj->name_len);
1262 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1265 LeaveCriticalSection (this_obj->synch_cs);
1271 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1275 ensure_synch_cs_set (this_obj);
1277 EnterCriticalSection (this_obj->synch_cs);
1279 if (!this_obj->name)
1282 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1284 LeaveCriticalSection (this_obj->synch_cs);
1290 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1292 ensure_synch_cs_set (this_obj);
1294 EnterCriticalSection (this_obj->synch_cs);
1296 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1297 LeaveCriticalSection (this_obj->synch_cs);
1299 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1303 this_obj->name = g_new (gunichar2, mono_string_length (name));
1304 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1305 this_obj->name_len = mono_string_length (name);
1308 this_obj->name = NULL;
1311 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1313 LeaveCriticalSection (this_obj->synch_cs);
1314 if (this_obj->name) {
1315 char *tname = mono_string_to_utf8 (name);
1316 mono_profiler_thread_name (this_obj->tid, tname);
1322 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1324 mono_thread_set_name_internal (this_obj, name, TRUE);
1327 /* If the array is already in the requested domain, we just return it,
1328 otherwise we return a copy in that domain. */
1330 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1337 if (mono_object_domain (arr) == domain)
1340 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1341 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1346 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1348 return byte_array_to_domain (arr, mono_get_root_domain ());
1352 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1354 return byte_array_to_domain (arr, mono_domain_get ());
1358 mono_thread_current (void)
1360 MonoDomain *domain = mono_domain_get ();
1361 MonoInternalThread *internal = mono_thread_internal_current ();
1362 MonoThread **current_thread_ptr;
1364 g_assert (internal);
1365 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1367 if (!*current_thread_ptr) {
1368 g_assert (domain != mono_get_root_domain ());
1369 *current_thread_ptr = new_thread_with_internal (domain, internal);
1371 return *current_thread_ptr;
1375 mono_thread_internal_current (void)
1377 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1378 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1382 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1383 int ms, HANDLE thread)
1385 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1388 mono_thread_current_check_pending_interrupt ();
1390 ensure_synch_cs_set (this);
1392 EnterCriticalSection (this->synch_cs);
1394 if ((this->state & ThreadState_Unstarted) != 0) {
1395 LeaveCriticalSection (this->synch_cs);
1397 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1401 LeaveCriticalSection (this->synch_cs);
1406 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1408 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1410 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1412 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1414 if(ret==WAIT_OBJECT_0) {
1415 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1420 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1426 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1434 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1437 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1439 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1441 if (ret != WAIT_IO_COMPLETION)
1444 exc = mono_thread_execute_interruption (thread);
1446 mono_raise_exception (exc);
1451 /* Re-calculate ms according to the time passed */
1452 diff_ms = (mono_100ns_ticks () - start) / 10000;
1453 if (diff_ms >= ms) {
1457 wait = ms - diff_ms;
1463 /* FIXME: exitContext isnt documented */
1464 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1470 MonoObject *waitHandle;
1471 MonoInternalThread *thread = mono_thread_internal_current ();
1473 /* Do this WaitSleepJoin check before creating objects */
1474 mono_thread_current_check_pending_interrupt ();
1476 numhandles = mono_array_length(mono_handles);
1477 handles = g_new0(HANDLE, numhandles);
1479 for(i = 0; i < numhandles; i++) {
1480 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1481 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1488 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1490 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1492 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1496 if(ret==WAIT_FAILED) {
1497 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1499 } else if(ret==WAIT_TIMEOUT) {
1500 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1507 /* FIXME: exitContext isnt documented */
1508 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1510 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1514 MonoObject *waitHandle;
1515 MonoInternalThread *thread = mono_thread_internal_current ();
1517 /* Do this WaitSleepJoin check before creating objects */
1518 mono_thread_current_check_pending_interrupt ();
1520 numhandles = mono_array_length(mono_handles);
1521 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1524 for(i = 0; i < numhandles; i++) {
1525 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1526 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1533 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1535 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1537 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1539 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1542 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1544 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1545 return ret - WAIT_OBJECT_0;
1547 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1548 return ret - WAIT_ABANDONED_0;
1555 /* FIXME: exitContext isnt documented */
1556 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1559 MonoInternalThread *thread = mono_thread_internal_current ();
1561 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1567 mono_thread_current_check_pending_interrupt ();
1569 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1571 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1573 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1575 if(ret==WAIT_FAILED) {
1576 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1578 } else if(ret==WAIT_TIMEOUT) {
1579 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1587 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1590 MonoInternalThread *thread = mono_thread_internal_current ();
1592 MONO_ARCH_SAVE_REGS;
1597 mono_thread_current_check_pending_interrupt ();
1599 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1601 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1603 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1605 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1608 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1612 MONO_ARCH_SAVE_REGS;
1617 mutex = CreateMutex (NULL, owned, NULL);
1619 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1621 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1629 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1630 MONO_ARCH_SAVE_REGS;
1632 return(ReleaseMutex (handle));
1635 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1641 MONO_ARCH_SAVE_REGS;
1643 *error = ERROR_SUCCESS;
1645 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1647 *error = GetLastError ();
1654 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1658 MONO_ARCH_SAVE_REGS;
1663 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1665 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1666 mono_string_chars (name));
1668 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1676 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1680 MONO_ARCH_SAVE_REGS;
1682 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1687 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1691 MONO_ARCH_SAVE_REGS;
1693 *error = ERROR_SUCCESS;
1695 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1697 *error = GetLastError ();
1703 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1707 MONO_ARCH_SAVE_REGS;
1712 event = CreateEvent (NULL, manual, initial, NULL);
1714 event = CreateEvent (NULL, manual, initial,
1715 mono_string_chars (name));
1717 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1725 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1726 MONO_ARCH_SAVE_REGS;
1728 return (SetEvent(handle));
1731 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1732 MONO_ARCH_SAVE_REGS;
1734 return (ResetEvent(handle));
1738 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1739 MONO_ARCH_SAVE_REGS;
1741 CloseHandle (handle);
1744 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1750 MONO_ARCH_SAVE_REGS;
1752 *error = ERROR_SUCCESS;
1754 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1756 *error = GetLastError ();
1762 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1764 MONO_ARCH_SAVE_REGS;
1766 return InterlockedIncrement (location);
1769 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1773 MONO_ARCH_SAVE_REGS;
1775 mono_interlocked_lock ();
1779 mono_interlocked_unlock ();
1785 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1787 MONO_ARCH_SAVE_REGS;
1789 return InterlockedDecrement(location);
1792 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1796 MONO_ARCH_SAVE_REGS;
1798 mono_interlocked_lock ();
1802 mono_interlocked_unlock ();
1807 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1809 MONO_ARCH_SAVE_REGS;
1811 return InterlockedExchange(location, value);
1814 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1817 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1818 mono_gc_wbarrier_generic_nostore (location);
1822 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1824 return InterlockedExchangePointer(location, value);
1827 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1829 IntFloatUnion val, ret;
1831 MONO_ARCH_SAVE_REGS;
1834 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1840 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1842 #if SIZEOF_VOID_P == 8
1843 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1848 * According to MSDN, this function is only atomic with regards to the
1849 * other Interlocked functions on 32 bit platforms.
1851 mono_interlocked_lock ();
1854 mono_interlocked_unlock ();
1861 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1863 #if SIZEOF_VOID_P == 8
1864 LongDoubleUnion val, ret;
1867 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1874 * According to MSDN, this function is only atomic with regards to the
1875 * other Interlocked functions on 32 bit platforms.
1877 mono_interlocked_lock ();
1880 mono_interlocked_unlock ();
1886 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1888 MONO_ARCH_SAVE_REGS;
1890 return InterlockedCompareExchange(location, value, comparand);
1893 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1896 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1897 mono_gc_wbarrier_generic_nostore (location);
1901 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1903 return InterlockedCompareExchangePointer(location, value, comparand);
1906 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1908 IntFloatUnion val, ret, cmp;
1910 MONO_ARCH_SAVE_REGS;
1913 cmp.fval = comparand;
1914 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1920 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1922 #if SIZEOF_VOID_P == 8
1923 LongDoubleUnion val, comp, ret;
1926 comp.fval = comparand;
1927 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1933 mono_interlocked_lock ();
1935 if (old == comparand)
1937 mono_interlocked_unlock ();
1944 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1946 #if SIZEOF_VOID_P == 8
1947 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1951 mono_interlocked_lock ();
1953 if (old == comparand)
1955 mono_interlocked_unlock ();
1962 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1965 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1966 mono_gc_wbarrier_generic_nostore (location);
1971 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1974 res = InterlockedExchangePointer ((gpointer *)location, value);
1975 mono_gc_wbarrier_generic_nostore (location);
1980 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1982 #if SIZEOF_VOID_P == 8
1983 /* Should be implemented as a JIT intrinsic */
1984 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1989 mono_interlocked_lock ();
1991 *location = orig + value;
1992 mono_interlocked_unlock ();
1994 return orig + value;
1999 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2001 #if SIZEOF_VOID_P == 8
2002 /* Should be implemented as a JIT intrinsic */
2003 mono_raise_exception (mono_get_exception_not_implemented (NULL));
2008 mono_interlocked_lock ();
2010 *location = orig + value;
2011 mono_interlocked_unlock ();
2013 return orig + value;
2018 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2020 #if SIZEOF_VOID_P == 8
2021 /* 64 bit reads are already atomic */
2026 mono_interlocked_lock ();
2028 mono_interlocked_unlock ();
2035 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2037 mono_threads_lock ();
2038 mono_threads_unlock ();
2042 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
2044 mono_thread_clr_state (this, state);
2046 if (state & ThreadState_Background) {
2047 /* If the thread changes the background mode, the main thread has to
2048 * be notified, since it has to rebuild the list of threads to
2051 SetEvent (background_change_event);
2056 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2058 mono_thread_set_state (this, state);
2060 if (state & ThreadState_Background) {
2061 /* If the thread changes the background mode, the main thread has to
2062 * be notified, since it has to rebuild the list of threads to
2065 SetEvent (background_change_event);
2070 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2074 ensure_synch_cs_set (this);
2076 EnterCriticalSection (this->synch_cs);
2078 state = this->state;
2080 LeaveCriticalSection (this->synch_cs);
2085 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2087 MonoInternalThread *current;
2090 ensure_synch_cs_set (this);
2092 current = mono_thread_internal_current ();
2094 EnterCriticalSection (this->synch_cs);
2096 this->thread_interrupt_requested = TRUE;
2097 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2099 LeaveCriticalSection (this->synch_cs);
2102 abort_thread_internal (this, TRUE, FALSE);
2106 void mono_thread_current_check_pending_interrupt ()
2108 MonoInternalThread *thread = mono_thread_internal_current ();
2109 gboolean throw = FALSE;
2111 mono_debugger_check_interruption ();
2113 ensure_synch_cs_set (thread);
2115 EnterCriticalSection (thread->synch_cs);
2117 if (thread->thread_interrupt_requested) {
2119 thread->thread_interrupt_requested = FALSE;
2122 LeaveCriticalSection (thread->synch_cs);
2125 mono_raise_exception (mono_get_exception_thread_interrupted ());
2130 mono_thread_get_abort_signal (void)
2134 #elif defined(PLATFORM_ANDROID)
2136 #elif !defined (SIGRTMIN)
2141 #endif /* SIGUSR1 */
2143 static int abort_signum = -1;
2145 if (abort_signum != -1)
2146 return abort_signum;
2147 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2148 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2149 struct sigaction sinfo;
2150 sigaction (i, NULL, &sinfo);
2151 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2156 /* fallback to the old way */
2158 #endif /* HOST_WIN32 */
2162 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2164 MonoException* exc = mono_thread_request_interruption (FALSE);
2165 if (exc) mono_raise_exception (exc);
2167 #endif /* HOST_WIN32 */
2170 * signal_thread_state_change
2172 * Tells the thread that his state has changed and it has to enter the new
2173 * state as soon as possible.
2175 static void signal_thread_state_change (MonoInternalThread *thread)
2177 if (thread == mono_thread_internal_current ()) {
2178 /* Do it synchronously */
2179 MonoException *exc = mono_thread_request_interruption (FALSE);
2181 mono_raise_exception (exc);
2185 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2187 /* fixme: store the state somewhere */
2188 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2191 * This will cause waits to be broken.
2192 * It will also prevent the thread from entering a wait, so if the thread returns
2193 * from the wait before it receives the abort signal, it will just spin in the wait
2194 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2197 wapi_interrupt_thread (thread->handle);
2198 #endif /* HOST_WIN32 */
2202 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2204 ensure_synch_cs_set (thread);
2206 EnterCriticalSection (thread->synch_cs);
2208 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2209 (thread->state & ThreadState_StopRequested) != 0 ||
2210 (thread->state & ThreadState_Stopped) != 0)
2212 LeaveCriticalSection (thread->synch_cs);
2216 if ((thread->state & ThreadState_Unstarted) != 0) {
2217 thread->state |= ThreadState_Aborted;
2218 LeaveCriticalSection (thread->synch_cs);
2222 thread->state |= ThreadState_AbortRequested;
2223 if (thread->abort_state_handle)
2224 mono_gchandle_free (thread->abort_state_handle);
2226 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2227 g_assert (thread->abort_state_handle);
2229 thread->abort_state_handle = 0;
2231 thread->abort_exc = NULL;
2234 * abort_exc is set in mono_thread_execute_interruption(),
2235 * triggered by the call to signal_thread_state_change(),
2236 * below. There's a point between where we have
2237 * abort_state_handle set, but abort_exc NULL, but that's not
2241 LeaveCriticalSection (thread->synch_cs);
2243 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2245 /* During shutdown, we can't wait for other threads */
2247 /* Make sure the thread is awake */
2248 mono_thread_resume (thread);
2250 abort_thread_internal (thread, TRUE, TRUE);
2254 ves_icall_System_Threading_Thread_ResetAbort (void)
2256 MonoInternalThread *thread = mono_thread_internal_current ();
2257 gboolean was_aborting;
2259 ensure_synch_cs_set (thread);
2261 EnterCriticalSection (thread->synch_cs);
2262 was_aborting = thread->state & ThreadState_AbortRequested;
2263 thread->state &= ~ThreadState_AbortRequested;
2264 LeaveCriticalSection (thread->synch_cs);
2266 if (!was_aborting) {
2267 const char *msg = "Unable to reset abort because no abort was requested";
2268 mono_raise_exception (mono_get_exception_thread_state (msg));
2270 thread->abort_exc = NULL;
2271 if (thread->abort_state_handle) {
2272 mono_gchandle_free (thread->abort_state_handle);
2273 /* This is actually not necessary - the handle
2274 only counts if the exception is set */
2275 thread->abort_state_handle = 0;
2280 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2282 ensure_synch_cs_set (thread);
2284 EnterCriticalSection (thread->synch_cs);
2286 thread->state &= ~ThreadState_AbortRequested;
2288 if (thread->abort_exc) {
2289 thread->abort_exc = NULL;
2290 if (thread->abort_state_handle) {
2291 mono_gchandle_free (thread->abort_state_handle);
2292 /* This is actually not necessary - the handle
2293 only counts if the exception is set */
2294 thread->abort_state_handle = 0;
2298 LeaveCriticalSection (thread->synch_cs);
2302 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2304 MonoInternalThread *thread = this->internal_thread;
2305 MonoObject *state, *deserialized = NULL, *exc;
2308 if (!thread->abort_state_handle)
2311 state = mono_gchandle_get_target (thread->abort_state_handle);
2314 domain = mono_domain_get ();
2315 if (mono_object_domain (state) == domain)
2318 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2320 if (!deserialized) {
2321 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2323 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2324 mono_raise_exception (invalid_op_exc);
2327 return deserialized;
2331 mono_thread_suspend (MonoInternalThread *thread)
2333 ensure_synch_cs_set (thread);
2335 EnterCriticalSection (thread->synch_cs);
2337 if ((thread->state & ThreadState_Unstarted) != 0 ||
2338 (thread->state & ThreadState_Aborted) != 0 ||
2339 (thread->state & ThreadState_Stopped) != 0)
2341 LeaveCriticalSection (thread->synch_cs);
2345 if ((thread->state & ThreadState_Suspended) != 0 ||
2346 (thread->state & ThreadState_SuspendRequested) != 0 ||
2347 (thread->state & ThreadState_StopRequested) != 0)
2349 LeaveCriticalSection (thread->synch_cs);
2353 thread->state |= ThreadState_SuspendRequested;
2355 LeaveCriticalSection (thread->synch_cs);
2357 suspend_thread_internal (thread, FALSE);
2362 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2364 if (!mono_thread_suspend (thread))
2365 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2369 mono_thread_resume (MonoInternalThread *thread)
2371 ensure_synch_cs_set (thread);
2373 EnterCriticalSection (thread->synch_cs);
2375 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2376 thread->state &= ~ThreadState_SuspendRequested;
2377 LeaveCriticalSection (thread->synch_cs);
2381 if ((thread->state & ThreadState_Suspended) == 0 ||
2382 (thread->state & ThreadState_Unstarted) != 0 ||
2383 (thread->state & ThreadState_Aborted) != 0 ||
2384 (thread->state & ThreadState_Stopped) != 0)
2386 LeaveCriticalSection (thread->synch_cs);
2390 return resume_thread_internal (thread);
2394 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2396 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2397 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2401 mono_threads_is_critical_method (MonoMethod *method)
2403 switch (method->wrapper_type) {
2404 case MONO_WRAPPER_RUNTIME_INVOKE:
2405 case MONO_WRAPPER_XDOMAIN_INVOKE:
2406 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2413 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2418 if (mono_threads_is_critical_method (m)) {
2419 *((gboolean*)data) = TRUE;
2426 is_running_protected_wrapper (void)
2428 gboolean found = FALSE;
2429 mono_stack_walk (find_wrapper, &found);
2433 void mono_thread_internal_stop (MonoInternalThread *thread)
2435 ensure_synch_cs_set (thread);
2437 EnterCriticalSection (thread->synch_cs);
2439 if ((thread->state & ThreadState_StopRequested) != 0 ||
2440 (thread->state & ThreadState_Stopped) != 0)
2442 LeaveCriticalSection (thread->synch_cs);
2446 /* Make sure the thread is awake */
2447 mono_thread_resume (thread);
2449 thread->state |= ThreadState_StopRequested;
2450 thread->state &= ~ThreadState_AbortRequested;
2452 LeaveCriticalSection (thread->synch_cs);
2454 abort_thread_internal (thread, TRUE, TRUE);
2457 void mono_thread_stop (MonoThread *thread)
2459 mono_thread_internal_stop (thread->internal_thread);
2463 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2465 return *((volatile gint8 *) (ptr));
2469 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2471 return *((volatile gint16 *) (ptr));
2475 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2477 return *((volatile gint32 *) (ptr));
2481 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2483 return *((volatile gint64 *) (ptr));
2487 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2489 return (void *) *((volatile void **) ptr);
2493 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2495 return *((volatile double *) (ptr));
2499 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2501 return *((volatile float *) (ptr));
2505 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2507 return (MonoObject*)*((volatile MonoObject**)ptr);
2511 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2513 *((volatile gint8 *) ptr) = value;
2517 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2519 *((volatile gint16 *) ptr) = value;
2523 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2525 *((volatile gint32 *) ptr) = value;
2529 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2531 *((volatile gint64 *) ptr) = value;
2535 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2537 *((volatile void **) ptr) = value;
2541 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2543 mono_gc_wbarrier_generic_store (ptr, value);
2547 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2549 *((volatile double *) ptr) = value;
2553 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2555 *((volatile float *) ptr) = value;
2559 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2561 *((volatile MonoObject **) ptr) = value;
2562 mono_gc_wbarrier_generic_nostore (ptr);
2565 void mono_thread_init (MonoThreadStartCB start_cb,
2566 MonoThreadAttachCB attach_cb)
2568 InitializeCriticalSection(&threads_mutex);
2569 InitializeCriticalSection(&interlocked_mutex);
2570 InitializeCriticalSection(&contexts_mutex);
2572 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2573 g_assert(background_change_event != NULL);
2575 mono_init_static_data_info (&thread_static_info);
2576 mono_init_static_data_info (&context_static_info);
2578 MONO_FAST_TLS_INIT (tls_current_object);
2579 mono_native_tls_alloc (¤t_object_key, NULL);
2580 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2582 mono_thread_start_cb = start_cb;
2583 mono_thread_attach_cb = attach_cb;
2585 /* Get a pseudo handle to the current process. This is just a
2586 * kludge so that wapi can build a process handle if needed.
2587 * As a pseudo handle is returned, we don't need to clean
2590 GetCurrentProcess ();
2593 void mono_thread_cleanup (void)
2595 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2596 /* The main thread must abandon any held mutexes (particularly
2597 * important for named mutexes as they are shared across
2598 * processes, see bug 74680.) This will happen when the
2599 * thread exits, but if it's not running in a subthread it
2600 * won't exit in time.
2602 /* Using non-w32 API is a nasty kludge, but I couldn't find
2603 * anything in the documentation that would let me do this
2604 * here yet still be safe to call on windows.
2606 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2610 /* This stuff needs more testing, it seems one of these
2611 * critical sections can be locked when mono_thread_cleanup is
2614 DeleteCriticalSection (&threads_mutex);
2615 DeleteCriticalSection (&interlocked_mutex);
2616 DeleteCriticalSection (&contexts_mutex);
2617 DeleteCriticalSection (&delayed_free_table_mutex);
2618 DeleteCriticalSection (&small_id_mutex);
2619 CloseHandle (background_change_event);
2622 mono_native_tls_free (current_object_key);
2626 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2628 mono_thread_cleanup_fn = func;
2632 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2634 thread->internal_thread->manage_callback = func;
2637 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2639 mono_thread_notify_pending_exc_fn = func;
2643 static void print_tids (gpointer key, gpointer value, gpointer user)
2645 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2646 * sizeof(uint) and a cast to uint would overflow
2648 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2649 * print this as a pointer.
2651 g_message ("Waiting for: %p", key);
2656 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2657 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2661 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2665 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2667 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2669 if(ret==WAIT_FAILED) {
2670 /* See the comment in build_wait_tids() */
2671 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2675 for(i=0; i<wait->num; i++)
2676 CloseHandle (wait->handles[i]);
2678 if (ret == WAIT_TIMEOUT)
2681 for(i=0; i<wait->num; i++) {
2682 gsize tid = wait->threads[i]->tid;
2684 mono_threads_lock ();
2685 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2686 /* This thread must have been killed, because
2687 * it hasn't cleaned itself up. (It's just
2688 * possible that the thread exited before the
2689 * parent thread had a chance to store the
2690 * handle, and now there is another pointer to
2691 * the already-exited thread stored. In this
2692 * case, we'll just get two
2693 * mono_profiler_thread_end() calls for the
2697 mono_threads_unlock ();
2698 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2699 thread_cleanup (wait->threads[i]);
2701 mono_threads_unlock ();
2706 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2708 guint32 i, ret, count;
2710 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2712 /* Add the thread state change event, so it wakes up if a thread changes
2713 * to background mode.
2716 if (count < MAXIMUM_WAIT_OBJECTS) {
2717 wait->handles [count] = background_change_event;
2721 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2723 if(ret==WAIT_FAILED) {
2724 /* See the comment in build_wait_tids() */
2725 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2729 for(i=0; i<wait->num; i++)
2730 CloseHandle (wait->handles[i]);
2732 if (ret == WAIT_TIMEOUT)
2735 if (ret < wait->num) {
2736 gsize tid = wait->threads[ret]->tid;
2737 mono_threads_lock ();
2738 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2739 /* See comment in wait_for_tids about thread cleanup */
2740 mono_threads_unlock ();
2741 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2742 thread_cleanup (wait->threads [ret]);
2744 mono_threads_unlock ();
2748 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2750 struct wait_data *wait=(struct wait_data *)user;
2752 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2754 MonoInternalThread *thread=(MonoInternalThread *)value;
2756 /* Ignore background threads, we abort them later */
2757 /* Do not lock here since it is not needed and the caller holds threads_lock */
2758 if (thread->state & ThreadState_Background) {
2759 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2760 return; /* just leave, ignore */
2763 if (mono_gc_is_finalizer_internal_thread (thread)) {
2764 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2768 if (thread == mono_thread_internal_current ()) {
2769 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2773 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2774 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2778 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2779 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2783 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2784 if (handle == NULL) {
2785 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2789 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2790 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2791 wait->handles[wait->num]=handle;
2792 wait->threads[wait->num]=thread;
2795 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2797 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2802 /* Just ignore the rest, we can't do anything with
2809 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2811 struct wait_data *wait=(struct wait_data *)user;
2812 gsize self = GetCurrentThreadId ();
2813 MonoInternalThread *thread = value;
2816 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2819 /* The finalizer thread is not a background thread */
2820 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2821 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2823 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2827 /* printf ("A: %d\n", wait->num); */
2828 wait->handles[wait->num]=thread->handle;
2829 wait->threads[wait->num]=thread;
2832 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2833 mono_thread_internal_stop (thread);
2837 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2841 * mono_threads_set_shutting_down:
2843 * Is called by a thread that wants to shut down Mono. If the runtime is already
2844 * shutting down, the calling thread is suspended/stopped, and this function never
2848 mono_threads_set_shutting_down (void)
2850 MonoInternalThread *current_thread = mono_thread_internal_current ();
2852 mono_threads_lock ();
2854 if (shutting_down) {
2855 mono_threads_unlock ();
2857 /* Make sure we're properly suspended/stopped */
2859 EnterCriticalSection (current_thread->synch_cs);
2861 if ((current_thread->state & ThreadState_SuspendRequested) ||
2862 (current_thread->state & ThreadState_AbortRequested) ||
2863 (current_thread->state & ThreadState_StopRequested)) {
2864 LeaveCriticalSection (current_thread->synch_cs);
2865 mono_thread_execute_interruption (current_thread);
2867 current_thread->state |= ThreadState_Stopped;
2868 LeaveCriticalSection (current_thread->synch_cs);
2871 /*since we're killing the thread, unset the current domain.*/
2872 mono_domain_unset ();
2874 /* Wake up other threads potentially waiting for us */
2877 shutting_down = TRUE;
2879 /* Not really a background state change, but this will
2880 * interrupt the main thread if it is waiting for all
2881 * the other threads.
2883 SetEvent (background_change_event);
2885 mono_threads_unlock ();
2890 * mono_threads_is_shutting_down:
2892 * Returns whether a thread has commenced shutdown of Mono. Note that
2893 * if the function returns FALSE the caller must not assume that
2894 * shutdown is not in progress, because the situation might have
2895 * changed since the function returned. For that reason this function
2896 * is of very limited utility.
2899 mono_threads_is_shutting_down (void)
2901 return shutting_down;
2904 void mono_thread_manage (void)
2906 struct wait_data wait_data;
2907 struct wait_data *wait = &wait_data;
2909 memset (wait, 0, sizeof (struct wait_data));
2910 /* join each thread that's still running */
2911 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2913 mono_threads_lock ();
2915 THREAD_DEBUG (g_message("%s: No threads", __func__));
2916 mono_threads_unlock ();
2919 mono_threads_unlock ();
2922 mono_threads_lock ();
2923 if (shutting_down) {
2924 /* somebody else is shutting down */
2925 mono_threads_unlock ();
2928 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2929 mono_g_hash_table_foreach (threads, print_tids, NULL));
2931 ResetEvent (background_change_event);
2933 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2934 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2935 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2936 mono_threads_unlock ();
2938 /* Something to wait for */
2939 wait_for_tids_or_state_change (wait, INFINITE);
2941 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2942 } while(wait->num>0);
2944 mono_runtime_shutdown ();
2946 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2947 mono_thread_pool_cleanup ();
2950 * Remove everything but the finalizer thread and self.
2951 * Also abort all the background threads
2954 mono_threads_lock ();
2957 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2958 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2959 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2961 mono_threads_unlock ();
2963 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2965 /* Something to wait for */
2966 wait_for_tids (wait, INFINITE);
2968 } while (wait->num > 0);
2971 * give the subthreads a chance to really quit (this is mainly needed
2972 * to get correct user and system times from getrusage/wait/time(1)).
2973 * This could be removed if we avoid pthread_detach() and use pthread_join().
2980 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2982 MonoInternalThread *thread=(MonoInternalThread *)value;
2984 if(thread->tid != (gsize)user) {
2985 /*TerminateThread (thread->handle, -1);*/
2989 void mono_thread_abort_all_other_threads (void)
2991 gsize self = GetCurrentThreadId ();
2993 mono_threads_lock ();
2994 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2995 mono_g_hash_table_size (threads));
2996 mono_g_hash_table_foreach (threads, print_tids, NULL));
2998 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3000 mono_threads_unlock ();
3004 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3006 MonoInternalThread *thread = (MonoInternalThread*)value;
3007 struct wait_data *wait = (struct wait_data*)user_data;
3011 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3013 * This needs no locking.
3015 if ((thread->state & ThreadState_Suspended) != 0 ||
3016 (thread->state & ThreadState_Stopped) != 0)
3019 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3020 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3024 wait->handles [wait->num] = handle;
3025 wait->threads [wait->num] = thread;
3031 * mono_thread_suspend_all_other_threads:
3033 * Suspend all managed threads except the finalizer thread and this thread. It is
3034 * not possible to resume them later.
3036 void mono_thread_suspend_all_other_threads (void)
3038 struct wait_data wait_data;
3039 struct wait_data *wait = &wait_data;
3041 gsize self = GetCurrentThreadId ();
3043 guint32 eventidx = 0;
3044 gboolean starting, finished;
3046 memset (wait, 0, sizeof (struct wait_data));
3048 * The other threads could be in an arbitrary state at this point, i.e.
3049 * they could be starting up, shutting down etc. This means that there could be
3050 * threads which are not even in the threads hash table yet.
3054 * First we set a barrier which will be checked by all threads before they
3055 * are added to the threads hash table, and they will exit if the flag is set.
3056 * This ensures that no threads could be added to the hash later.
3057 * We will use shutting_down as the barrier for now.
3059 g_assert (shutting_down);
3062 * We make multiple calls to WaitForMultipleObjects since:
3063 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3064 * - some threads could exit without becoming suspended
3069 * Make a copy of the hashtable since we can't do anything with
3070 * threads while threads_mutex is held.
3073 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3074 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3075 mono_threads_lock ();
3076 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3077 mono_threads_unlock ();
3079 events = g_new0 (gpointer, wait->num);
3081 /* Get the suspended events that we'll be waiting for */
3082 for (i = 0; i < wait->num; ++i) {
3083 MonoInternalThread *thread = wait->threads [i];
3084 gboolean signal_suspend = FALSE;
3086 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3087 //CloseHandle (wait->handles [i]);
3088 wait->threads [i] = NULL; /* ignore this thread in next loop */
3092 ensure_synch_cs_set (thread);
3094 EnterCriticalSection (thread->synch_cs);
3096 if (thread->suspended_event == NULL) {
3097 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3098 if (thread->suspended_event == NULL) {
3099 /* Forget this one and go on to the next */
3100 LeaveCriticalSection (thread->synch_cs);
3105 if ((thread->state & ThreadState_Suspended) != 0 ||
3106 (thread->state & ThreadState_StopRequested) != 0 ||
3107 (thread->state & ThreadState_Stopped) != 0) {
3108 LeaveCriticalSection (thread->synch_cs);
3109 CloseHandle (wait->handles [i]);
3110 wait->threads [i] = NULL; /* ignore this thread in next loop */
3114 if ((thread->state & ThreadState_SuspendRequested) == 0)
3115 signal_suspend = TRUE;
3117 events [eventidx++] = thread->suspended_event;
3119 /* Convert abort requests into suspend requests */
3120 if ((thread->state & ThreadState_AbortRequested) != 0)
3121 thread->state &= ~ThreadState_AbortRequested;
3123 thread->state |= ThreadState_SuspendRequested;
3125 LeaveCriticalSection (thread->synch_cs);
3127 /* Signal the thread to suspend */
3128 if (mono_thread_info_new_interrupt_enabled ())
3129 suspend_thread_internal (thread, TRUE);
3130 else if (signal_suspend)
3131 signal_thread_state_change (thread);
3134 /*Only wait on the suspend event if we are using the old path */
3135 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3136 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3137 for (i = 0; i < wait->num; ++i) {
3138 MonoInternalThread *thread = wait->threads [i];
3143 ensure_synch_cs_set (thread);
3145 EnterCriticalSection (thread->synch_cs);
3146 if ((thread->state & ThreadState_Suspended) != 0) {
3147 CloseHandle (thread->suspended_event);
3148 thread->suspended_event = NULL;
3150 LeaveCriticalSection (thread->synch_cs);
3154 if (eventidx <= 0) {
3156 * If there are threads which are starting up, we wait until they
3157 * are suspended when they try to register in the threads hash.
3158 * This is guaranteed to finish, since the threads which can create new
3159 * threads get suspended after a while.
3160 * FIXME: The finalizer thread can still create new threads.
3162 mono_threads_lock ();
3163 if (threads_starting_up)
3164 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3167 mono_threads_unlock ();
3179 collect_threads (gpointer key, gpointer value, gpointer user_data)
3181 MonoInternalThread *thread = (MonoInternalThread*)value;
3182 struct wait_data *wait = (struct wait_data*)user_data;
3185 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3186 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3190 wait->handles [wait->num] = handle;
3191 wait->threads [wait->num] = thread;
3196 static gboolean thread_dump_requested;
3198 static G_GNUC_UNUSED gboolean
3199 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3201 GString *p = (GString*)data;
3202 MonoMethod *method = NULL;
3204 method = frame->ji->method;
3207 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3208 g_string_append_printf (p, " %s\n", location);
3211 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3217 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3219 GString* text = g_string_new (0);
3221 GError *error = NULL;
3224 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3226 g_string_append_printf (text, "\n\"%s\"", name);
3229 else if (thread->threadpool_thread)
3230 g_string_append (text, "\n\"<threadpool thread>\"");
3232 g_string_append (text, "\n\"<unnamed thread>\"");
3235 /* This no longer works with remote unwinding */
3237 wapi_desc = wapi_current_thread_desc ();
3238 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3243 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3244 mono_thread_info_resume (mono_thread_info_get_tid (info));
3246 fprintf (stdout, "%s", text->str);
3248 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3249 OutputDebugStringA(text->str);
3252 g_string_free (text, TRUE);
3257 dump_thread (gpointer key, gpointer value, gpointer user)
3259 MonoInternalThread *thread = (MonoInternalThread *)value;
3260 MonoThreadInfo *info;
3262 if (thread == mono_thread_internal_current ())
3266 FIXME This still can hang if we stop a thread during malloc.
3267 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3268 that takes a callback and runs it with the target suspended.
3269 We probably should loop a bit around trying to get it to either managed code
3272 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3277 print_thread_dump (thread, info);
3281 mono_threads_perform_thread_dump (void)
3283 if (!thread_dump_requested)
3286 printf ("Full thread dump:\n");
3289 * Make a copy of the hashtable since we can't do anything with
3290 * threads while threads_mutex is held.
3292 mono_threads_lock ();
3293 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3294 mono_threads_unlock ();
3296 thread_dump_requested = FALSE;
3300 * mono_threads_request_thread_dump:
3302 * Ask all threads except the current to print their stacktrace to stdout.
3305 mono_threads_request_thread_dump (void)
3307 struct wait_data wait_data;
3308 struct wait_data *wait = &wait_data;
3311 /*The new thread dump code runs out of the finalizer thread. */
3312 if (mono_thread_info_new_interrupt_enabled ()) {
3313 thread_dump_requested = TRUE;
3314 mono_gc_finalize_notify ();
3319 memset (wait, 0, sizeof (struct wait_data));
3322 * Make a copy of the hashtable since we can't do anything with
3323 * threads while threads_mutex is held.
3325 mono_threads_lock ();
3326 mono_g_hash_table_foreach (threads, collect_threads, wait);
3327 mono_threads_unlock ();
3329 for (i = 0; i < wait->num; ++i) {
3330 MonoInternalThread *thread = wait->threads [i];
3332 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3333 (thread != mono_thread_internal_current ()) &&
3334 !thread->thread_dump_requested) {
3335 thread->thread_dump_requested = TRUE;
3337 signal_thread_state_change (thread);
3340 CloseHandle (wait->handles [i]);
3346 gint allocated; /* +1 so that refs [allocated] == NULL */
3350 typedef struct ref_stack RefStack;
3353 ref_stack_new (gint initial_size)
3357 initial_size = MAX (initial_size, 16) + 1;
3358 rs = g_new0 (RefStack, 1);
3359 rs->refs = g_new0 (gpointer, initial_size);
3360 rs->allocated = initial_size;
3365 ref_stack_destroy (gpointer ptr)
3376 ref_stack_push (RefStack *rs, gpointer ptr)
3378 g_assert (rs != NULL);
3380 if (rs->bottom >= rs->allocated) {
3381 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3382 rs->allocated <<= 1;
3383 rs->refs [rs->allocated] = NULL;
3385 rs->refs [rs->bottom++] = ptr;
3389 ref_stack_pop (RefStack *rs)
3391 if (rs == NULL || rs->bottom == 0)
3395 rs->refs [rs->bottom] = NULL;
3399 ref_stack_find (RefStack *rs, gpointer ptr)
3406 for (refs = rs->refs; refs && *refs; refs++) {
3414 * mono_thread_push_appdomain_ref:
3416 * Register that the current thread may have references to objects in domain
3417 * @domain on its stack. Each call to this function should be paired with a
3418 * call to pop_appdomain_ref.
3421 mono_thread_push_appdomain_ref (MonoDomain *domain)
3423 MonoInternalThread *thread = mono_thread_internal_current ();
3426 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3427 SPIN_LOCK (thread->lock_thread_id);
3428 if (thread->appdomain_refs == NULL)
3429 thread->appdomain_refs = ref_stack_new (16);
3430 ref_stack_push (thread->appdomain_refs, domain);
3431 SPIN_UNLOCK (thread->lock_thread_id);
3436 mono_thread_pop_appdomain_ref (void)
3438 MonoInternalThread *thread = mono_thread_internal_current ();
3441 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3442 SPIN_LOCK (thread->lock_thread_id);
3443 ref_stack_pop (thread->appdomain_refs);
3444 SPIN_UNLOCK (thread->lock_thread_id);
3449 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3452 SPIN_LOCK (thread->lock_thread_id);
3453 res = ref_stack_find (thread->appdomain_refs, domain);
3454 SPIN_UNLOCK (thread->lock_thread_id);
3459 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3461 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3464 typedef struct abort_appdomain_data {
3465 struct wait_data wait;
3467 } abort_appdomain_data;
3470 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3472 MonoInternalThread *thread = (MonoInternalThread*)value;
3473 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3474 MonoDomain *domain = data->domain;
3476 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3477 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3479 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3480 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3483 data->wait.handles [data->wait.num] = handle;
3484 data->wait.threads [data->wait.num] = thread;
3487 /* Just ignore the rest, we can't do anything with
3495 * mono_threads_abort_appdomain_threads:
3497 * Abort threads which has references to the given appdomain.
3500 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3502 #ifdef __native_client__
3506 abort_appdomain_data user_data;
3508 int orig_timeout = timeout;
3511 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3513 start_time = mono_msec_ticks ();
3515 mono_threads_lock ();
3517 user_data.domain = domain;
3518 user_data.wait.num = 0;
3519 /* This shouldn't take any locks */
3520 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3521 mono_threads_unlock ();
3523 if (user_data.wait.num > 0) {
3524 /* Abort the threads outside the threads lock */
3525 for (i = 0; i < user_data.wait.num; ++i)
3526 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3529 * We should wait for the threads either to abort, or to leave the
3530 * domain. We can't do the latter, so we wait with a timeout.
3532 wait_for_tids (&user_data.wait, 100);
3535 /* Update remaining time */
3536 timeout -= mono_msec_ticks () - start_time;
3537 start_time = mono_msec_ticks ();
3539 if (orig_timeout != -1 && timeout < 0)
3542 while (user_data.wait.num > 0);
3544 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3550 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3552 MonoInternalThread *thread = (MonoInternalThread*)value;
3553 MonoDomain *domain = (MonoDomain*)user_data;
3556 /* No locking needed here */
3557 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3559 if (thread->cached_culture_info) {
3560 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3561 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3562 if (obj && obj->vtable->domain == domain)
3563 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3569 * mono_threads_clear_cached_culture:
3571 * Clear the cached_current_culture from all threads if it is in the
3575 mono_threads_clear_cached_culture (MonoDomain *domain)
3577 mono_threads_lock ();
3578 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3579 mono_threads_unlock ();
3583 * mono_thread_get_undeniable_exception:
3585 * Return an exception which needs to be raised when leaving a catch clause.
3586 * This is used for undeniable exception propagation.
3589 mono_thread_get_undeniable_exception (void)
3591 MonoInternalThread *thread = mono_thread_internal_current ();
3593 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3595 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3596 * exception if the thread no longer references a dying appdomain.
3598 thread->abort_exc->trace_ips = NULL;
3599 thread->abort_exc->stack_trace = NULL;
3600 return thread->abort_exc;
3606 #if MONO_SMALL_CONFIG
3607 #define NUM_STATIC_DATA_IDX 4
3608 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3612 #define NUM_STATIC_DATA_IDX 8
3613 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3614 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3618 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3621 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3624 gpointer *static_data = addr;
3625 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3628 if (!static_data [i])
3630 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3631 ptr = static_data [i];
3632 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3633 uintptr_t bmap = static_reference_bitmaps [i][j];
3636 if ((bmap & 1) && *p) {
3647 * mono_alloc_static_data
3649 * Allocate memory blocks for storing threads or context static data
3652 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3654 guint idx = (offset >> 24) - 1;
3657 gpointer* static_data = *static_data_ptr;
3659 static void* tls_desc = NULL;
3660 if (mono_gc_user_markers_supported () && !tls_desc)
3661 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3662 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3663 *static_data_ptr = static_data;
3664 static_data [0] = static_data;
3667 for (i = 1; i <= idx; ++i) {
3668 if (static_data [i])
3670 if (mono_gc_user_markers_supported () && threadlocal)
3671 static_data [i] = g_malloc0 (static_data_size [i]);
3673 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3678 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3681 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3682 if (!static_data [i])
3684 if (mono_gc_user_markers_supported () && threadlocal)
3685 g_free (static_data [i]);
3687 mono_gc_free_fixed (static_data [i]);
3689 mono_gc_free_fixed (static_data);
3693 * mono_init_static_data_info
3695 * Initializes static data counters
3697 static void mono_init_static_data_info (StaticDataInfo *static_data)
3699 static_data->idx = 0;
3700 static_data->offset = 0;
3701 static_data->freelist = NULL;
3705 * mono_alloc_static_data_slot
3707 * Generates an offset for static data. static_data contains the counters
3708 * used to generate it.
3711 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3715 if (!static_data->idx && !static_data->offset) {
3717 * we use the first chunk of the first allocation also as
3718 * an array for the rest of the data
3720 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3722 static_data->offset += align - 1;
3723 static_data->offset &= ~(align - 1);
3724 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3725 static_data->idx ++;
3726 g_assert (size <= static_data_size [static_data->idx]);
3727 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3728 static_data->offset = 0;
3730 offset = static_data->offset | ((static_data->idx + 1) << 24);
3731 static_data->offset += size;
3736 * ensure thread static fields already allocated are valid for thread
3737 * This function is called when a thread is created or on thread attach.
3740 thread_adjust_static_data (MonoInternalThread *thread)
3744 mono_threads_lock ();
3745 if (thread_static_info.offset || thread_static_info.idx > 0) {
3746 /* get the current allocated size */
3747 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3748 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3750 mono_threads_unlock ();
3754 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3756 MonoInternalThread *thread = value;
3757 guint32 offset = GPOINTER_TO_UINT (user);
3759 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3762 static MonoThreadDomainTls*
3763 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3765 MonoThreadDomainTls* prev = NULL;
3766 MonoThreadDomainTls* tmp = static_data->freelist;
3768 if (tmp->size == size) {
3770 prev->next = tmp->next;
3772 static_data->freelist = tmp->next;
3781 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3784 int idx = (offset >> 24) - 1;
3786 if (!static_reference_bitmaps [idx])
3787 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3788 rb = static_reference_bitmaps [idx];
3790 offset /= sizeof (gpointer);
3791 /* offset is now the bitmap offset */
3792 for (i = 0; i < numbits; ++i) {
3793 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3794 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3799 clear_reference_bitmap (guint32 offset, guint32 size)
3801 int idx = (offset >> 24) - 1;
3803 rb = static_reference_bitmaps [idx];
3805 offset /= sizeof (gpointer);
3806 size /= sizeof (gpointer);
3808 /* offset is now the bitmap offset */
3809 for (; offset < size; ++offset)
3810 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3814 * The offset for a special static variable is composed of three parts:
3815 * a bit that indicates the type of static data (0:thread, 1:context),
3816 * an index in the array of chunks of memory for the thread (thread->static_data)
3817 * and an offset in that chunk of mem. This allows allocating less memory in the
3822 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3825 if (static_type == SPECIAL_STATIC_THREAD) {
3826 MonoThreadDomainTls *item;
3827 mono_threads_lock ();
3828 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3829 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3831 offset = item->offset;
3834 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3836 update_tls_reference_bitmap (offset, bitmap, numbits);
3837 /* This can be called during startup */
3838 if (threads != NULL)
3839 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3840 mono_threads_unlock ();
3842 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3843 mono_contexts_lock ();
3844 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3845 mono_contexts_unlock ();
3846 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3852 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3854 /* The high bit means either thread (0) or static (1) data. */
3856 guint32 static_type = (offset & 0x80000000);
3859 offset &= 0x7fffffff;
3860 idx = (offset >> 24) - 1;
3862 if (static_type == 0) {
3863 return get_thread_static_data (thread, offset);
3865 /* Allocate static data block under demand, since we don't have a list
3868 MonoAppContext *context = mono_context_get ();
3869 if (!context->static_data || !context->static_data [idx]) {
3870 mono_contexts_lock ();
3871 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3872 mono_contexts_unlock ();
3874 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3879 mono_get_special_static_data (guint32 offset)
3881 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3890 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3892 MonoInternalThread *thread = value;
3893 TlsOffsetSize *data = user;
3894 int idx = (data->offset >> 24) - 1;
3897 if (!thread->static_data || !thread->static_data [idx])
3899 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3900 mono_gc_bzero (ptr, data->size);
3904 do_free_special_slot (guint32 offset, guint32 size)
3906 guint32 static_type = (offset & 0x80000000);
3907 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3908 if (static_type == 0) {
3910 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3911 data.offset = offset & 0x7fffffff;
3913 clear_reference_bitmap (data.offset, data.size);
3914 if (threads != NULL)
3915 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3916 item->offset = offset;
3919 if (!mono_runtime_is_shutting_down ()) {
3920 item->next = thread_static_info.freelist;
3921 thread_static_info.freelist = item;
3923 /* We could be called during shutdown after mono_thread_cleanup () is called */
3927 /* FIXME: free context static data as well */
3932 do_free_special (gpointer key, gpointer value, gpointer data)
3934 MonoClassField *field = key;
3935 guint32 offset = GPOINTER_TO_UINT (value);
3938 size = mono_type_size (field->type, &align);
3939 do_free_special_slot (offset, size);
3943 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3945 mono_threads_lock ();
3946 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3947 mono_threads_unlock ();
3951 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3953 mono_threads_lock ();
3954 do_free_special_slot (offset, size);
3955 mono_threads_unlock ();
3959 * allocates room in the thread local area for storing an instance of the struct type
3960 * the allocation is kept track of in domain->tlsrec_list.
3963 mono_thread_alloc_tls (MonoReflectionType *type)
3965 MonoDomain *domain = mono_domain_get ();
3967 MonoTlsDataRecord *tlsrec;
3970 gsize default_bitmap [4] = {0};
3971 uint32_t tls_offset;
3975 klass = mono_class_from_mono_type (type->type);
3976 /* TlsDatum is a struct, so we subtract the object header size offset */
3977 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3978 size = mono_type_size (type->type, &align);
3979 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3980 if (bitmap != default_bitmap)
3982 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3983 tlsrec->tls_offset = tls_offset;
3984 tlsrec->size = size;
3985 mono_domain_lock (domain);
3986 tlsrec->next = domain->tlsrec_list;
3987 domain->tlsrec_list = tlsrec;
3988 mono_domain_unlock (domain);
3993 mono_thread_destroy_tls (uint32_t tls_offset)
3995 MonoTlsDataRecord *prev = NULL;
3996 MonoTlsDataRecord *cur;
3998 MonoDomain *domain = mono_domain_get ();
3999 mono_domain_lock (domain);
4000 cur = domain->tlsrec_list;
4002 if (cur->tls_offset == tls_offset) {
4004 prev->next = cur->next;
4006 domain->tlsrec_list = cur->next;
4014 mono_domain_unlock (domain);
4016 mono_special_static_data_free_slot (tls_offset, size);
4020 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4023 mono_thread_destroy_domain_tls (MonoDomain *domain)
4025 while (domain->tlsrec_list)
4026 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4029 static MonoClassField *local_slots = NULL;
4032 /* local tls data to get locals_slot from a thread */
4035 /* index in the locals_slot array */
4040 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4042 LocalSlotID *sid = user_data;
4043 MonoInternalThread *thread = (MonoInternalThread*)value;
4044 MonoArray *slots_array;
4046 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4047 * it is for the right domain, so we need to check if it is allocated an initialized
4048 * for the current thread.
4050 /*g_print ("handling thread %p\n", thread);*/
4051 if (!thread->static_data || !thread->static_data [sid->idx])
4053 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4054 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4056 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4060 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4068 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4070 g_warning ("local_slots field not found in Thread class");
4074 domain = mono_domain_get ();
4075 mono_domain_lock (domain);
4076 if (domain->special_static_fields)
4077 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4078 mono_domain_unlock (domain);
4081 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4082 sid.offset = GPOINTER_TO_UINT (addr);
4083 sid.offset &= 0x7fffffff;
4084 sid.idx = (sid.offset >> 24) - 1;
4085 mono_threads_lock ();
4086 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4087 mono_threads_unlock ();
4089 /* FIXME: clear the slot for MonoAppContexts, too */
4094 static void CALLBACK dummy_apc (ULONG_PTR param)
4098 static guint32 dummy_apc (gpointer param)
4105 * mono_thread_execute_interruption
4107 * Performs the operation that the requested thread state requires (abort,
4110 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4112 ensure_synch_cs_set (thread);
4114 EnterCriticalSection (thread->synch_cs);
4116 /* MonoThread::interruption_requested can only be changed with atomics */
4117 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4118 /* this will consume pending APC calls */
4119 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4120 InterlockedDecrement (&thread_interruption_requested);
4122 /* Clear the interrupted flag of the thread so it can wait again */
4123 wapi_clear_interruption ();
4127 if ((thread->state & ThreadState_AbortRequested) != 0) {
4128 LeaveCriticalSection (thread->synch_cs);
4129 if (thread->abort_exc == NULL) {
4131 * This might be racy, but it has to be called outside the lock
4132 * since it calls managed code.
4134 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4136 return thread->abort_exc;
4138 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4139 self_suspend_internal (thread);
4142 else if ((thread->state & ThreadState_StopRequested) != 0) {
4143 /* FIXME: do this through the JIT? */
4145 LeaveCriticalSection (thread->synch_cs);
4147 mono_thread_exit ();
4149 } else if (thread->pending_exception) {
4152 exc = thread->pending_exception;
4153 thread->pending_exception = NULL;
4155 LeaveCriticalSection (thread->synch_cs);
4157 } else if (thread->thread_interrupt_requested) {
4159 thread->thread_interrupt_requested = FALSE;
4160 LeaveCriticalSection (thread->synch_cs);
4162 return(mono_get_exception_thread_interrupted ());
4165 LeaveCriticalSection (thread->synch_cs);
4171 * mono_thread_request_interruption
4173 * A signal handler can call this method to request the interruption of a
4174 * thread. The result of the interruption will depend on the current state of
4175 * the thread. If the result is an exception that needs to be throw, it is
4176 * provided as return value.
4179 mono_thread_request_interruption (gboolean running_managed)
4181 MonoInternalThread *thread = mono_thread_internal_current ();
4183 /* The thread may already be stopping */
4188 if (thread->interrupt_on_stop &&
4189 thread->state & ThreadState_StopRequested &&
4190 thread->state & ThreadState_Background)
4194 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4196 InterlockedIncrement (&thread_interruption_requested);
4198 if (!running_managed || is_running_protected_wrapper ()) {
4199 /* Can't stop while in unmanaged code. Increase the global interruption
4200 request count. When exiting the unmanaged method the count will be
4201 checked and the thread will be interrupted. */
4204 if (mono_thread_notify_pending_exc_fn && !running_managed)
4205 /* The JIT will notify the thread about the interruption */
4206 /* This shouldn't take any locks */
4207 mono_thread_notify_pending_exc_fn ();
4209 /* this will awake the thread if it is in WaitForSingleObject
4211 /* Our implementation of this function ignores the func argument */
4212 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4216 return mono_thread_execute_interruption (thread);
4220 /*This function should be called by a thread after it has exited all of
4221 * its handle blocks at interruption time.*/
4223 mono_thread_resume_interruption (void)
4225 MonoInternalThread *thread = mono_thread_internal_current ();
4226 gboolean still_aborting;
4228 /* The thread may already be stopping */
4232 ensure_synch_cs_set (thread);
4233 EnterCriticalSection (thread->synch_cs);
4234 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4235 LeaveCriticalSection (thread->synch_cs);
4237 /*This can happen if the protected block called Thread::ResetAbort*/
4238 if (!still_aborting)
4241 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4243 InterlockedIncrement (&thread_interruption_requested);
4246 wapi_self_interrupt ();
4248 return mono_thread_execute_interruption (thread);
4251 gboolean mono_thread_interruption_requested ()
4253 if (thread_interruption_requested) {
4254 MonoInternalThread *thread = mono_thread_internal_current ();
4255 /* The thread may already be stopping */
4257 return (thread->interruption_requested);
4262 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4264 MonoInternalThread *thread = mono_thread_internal_current ();
4266 /* The thread may already be stopping */
4270 mono_debugger_check_interruption ();
4272 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4273 MonoException* exc = mono_thread_execute_interruption (thread);
4274 if (exc) mono_raise_exception (exc);
4279 * Performs the interruption of the current thread, if one has been requested,
4280 * and the thread is not running a protected wrapper.
4282 void mono_thread_interruption_checkpoint ()
4284 mono_thread_interruption_checkpoint_request (FALSE);
4288 * Performs the interruption of the current thread, if one has been requested.
4290 void mono_thread_force_interruption_checkpoint ()
4292 mono_thread_interruption_checkpoint_request (TRUE);
4296 * mono_thread_get_and_clear_pending_exception:
4298 * Return any pending exceptions for the current thread and clear it as a side effect.
4301 mono_thread_get_and_clear_pending_exception (void)
4303 MonoInternalThread *thread = mono_thread_internal_current ();
4305 /* The thread may already be stopping */
4309 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4310 return mono_thread_execute_interruption (thread);
4313 if (thread->pending_exception) {
4314 MonoException *exc = thread->pending_exception;
4316 thread->pending_exception = NULL;
4324 * mono_set_pending_exception:
4326 * Set the pending exception of the current thread to EXC.
4327 * The exception will be thrown when execution returns to managed code.
4330 mono_set_pending_exception (MonoException *exc)
4332 MonoInternalThread *thread = mono_thread_internal_current ();
4334 /* The thread may already be stopping */
4338 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4340 mono_thread_request_interruption (FALSE);
4344 * mono_thread_interruption_request_flag:
4346 * Returns the address of a flag that will be non-zero if an interruption has
4347 * been requested for a thread. The thread to interrupt may not be the current
4348 * thread, so an additional call to mono_thread_interruption_requested() or
4349 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4352 gint32* mono_thread_interruption_request_flag ()
4354 return &thread_interruption_requested;
4358 mono_thread_init_apartment_state (void)
4361 MonoInternalThread* thread = mono_thread_internal_current ();
4363 /* Positive return value indicates success, either
4364 * S_OK if this is first CoInitialize call, or
4365 * S_FALSE if CoInitialize already called, but with same
4366 * threading model. A negative value indicates failure,
4367 * probably due to trying to change the threading model.
4369 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4370 ? COINIT_APARTMENTTHREADED
4371 : COINIT_MULTITHREADED) < 0) {
4372 thread->apartment_state = ThreadApartmentState_Unknown;
4378 mono_thread_cleanup_apartment_state (void)
4381 MonoInternalThread* thread = mono_thread_internal_current ();
4383 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4390 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4392 ensure_synch_cs_set (thread);
4394 EnterCriticalSection (thread->synch_cs);
4395 thread->state |= state;
4396 LeaveCriticalSection (thread->synch_cs);
4400 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4402 ensure_synch_cs_set (thread);
4404 EnterCriticalSection (thread->synch_cs);
4405 thread->state &= ~state;
4406 LeaveCriticalSection (thread->synch_cs);
4410 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4412 gboolean ret = FALSE;
4414 ensure_synch_cs_set (thread);
4416 EnterCriticalSection (thread->synch_cs);
4418 if ((thread->state & test) != 0) {
4422 LeaveCriticalSection (thread->synch_cs);
4427 //static MonoClassField *execution_context_field;
4430 get_execution_context_addr (void)
4432 MonoDomain *domain = mono_domain_get ();
4433 guint32 offset = domain->execution_context_field_offset;
4436 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4439 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4441 mono_domain_lock (domain);
4442 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4443 mono_domain_unlock (domain);
4446 domain->execution_context_field_offset = offset;
4449 return (MonoObject**) mono_get_special_static_data (offset);
4453 mono_thread_get_execution_context (void)
4455 return *get_execution_context_addr ();
4459 mono_thread_set_execution_context (MonoObject *ec)
4461 *get_execution_context_addr () = ec;
4464 static gboolean has_tls_get = FALSE;
4467 mono_runtime_set_has_tls_get (gboolean val)
4473 mono_runtime_has_tls_get (void)
4479 mono_thread_kill (MonoInternalThread *thread, int signal)
4481 #ifdef __native_client__
4482 /* Workaround pthread_kill abort() in NaCl glibc. */
4486 /* Win32 uses QueueUserAPC and callers of this are guarded */
4487 g_assert_not_reached ();
4489 # ifdef PTHREAD_POINTER_ID
4490 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4492 # ifdef PLATFORM_ANDROID
4493 if (thread->android_tid != 0) {
4495 int old_errno = errno;
4497 ret = tkill ((pid_t) thread->android_tid, signal);
4506 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4508 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4515 self_interrupt_thread (void *_unused)
4517 MonoThreadInfo *info = mono_thread_info_current ();
4518 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4519 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4520 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4521 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4525 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4529 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4533 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4535 MonoJitInfo **dest = data;
4541 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4543 MonoJitInfo *ji = NULL;
4546 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4551 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4554 MonoThreadInfo *info = NULL;
4555 gboolean protected_wrapper;
4556 gboolean running_managed;
4558 if (!mono_thread_info_new_interrupt_enabled ()) {
4559 signal_thread_state_change (thread);
4564 FIXME this is insanely broken, it doesn't cause interruption to happen
4565 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4567 if (thread == mono_thread_internal_current ()) {
4568 /* Do it synchronously */
4569 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4571 mono_raise_exception (exc);
4573 wapi_interrupt_thread (thread->handle);
4578 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4579 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4583 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4584 mono_thread_info_resume (mono_thread_info_get_tid (info));
4588 /*someone is already interrupting it*/
4589 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4590 mono_thread_info_resume (mono_thread_info_get_tid (info));
4593 InterlockedIncrement (&thread_interruption_requested);
4595 ji = mono_thread_info_get_last_managed (info);
4596 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4597 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4599 if (!protected_wrapper && running_managed) {
4600 /*We are in managed code*/
4601 /*Set the thread to call */
4602 if (install_async_abort)
4603 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4604 mono_thread_info_resume (mono_thread_info_get_tid (info));
4606 gpointer interrupt_handle;
4608 * This will cause waits to be broken.
4609 * It will also prevent the thread from entering a wait, so if the thread returns
4610 * from the wait before it receives the abort signal, it will just spin in the wait
4611 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4615 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4617 mono_thread_info_resume (mono_thread_info_get_tid (info));
4619 wapi_finish_interrupt_thread (interrupt_handle);
4622 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4626 transition_to_suspended (MonoInternalThread *thread)
4628 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4629 g_assert (0); /*FIXME we should not reach this */
4630 /*Make sure we balance the suspend count.*/
4631 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4633 thread->state &= ~ThreadState_SuspendRequested;
4634 thread->state |= ThreadState_Suspended;
4636 LeaveCriticalSection (thread->synch_cs);
4640 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4642 if (!mono_thread_info_new_interrupt_enabled ()) {
4643 signal_thread_state_change (thread);
4647 EnterCriticalSection (thread->synch_cs);
4648 if (thread == mono_thread_internal_current ()) {
4649 transition_to_suspended (thread);
4650 mono_thread_info_self_suspend ();
4652 MonoThreadInfo *info;
4654 gboolean protected_wrapper;
4655 gboolean running_managed;
4657 /*A null info usually means the thread is already dead. */
4658 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4659 LeaveCriticalSection (thread->synch_cs);
4663 ji = mono_thread_info_get_last_managed (info);
4664 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4665 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4667 if (running_managed && !protected_wrapper) {
4668 transition_to_suspended (thread);
4670 gpointer interrupt_handle;
4672 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4673 InterlockedIncrement (&thread_interruption_requested);
4676 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4678 mono_thread_info_resume (mono_thread_info_get_tid (info));
4681 wapi_finish_interrupt_thread (interrupt_handle);
4683 LeaveCriticalSection (thread->synch_cs);
4688 /*This is called with @thread synch_cs held and it must release it*/
4690 self_suspend_internal (MonoInternalThread *thread)
4692 if (!mono_thread_info_new_interrupt_enabled ()) {
4693 thread->state &= ~ThreadState_SuspendRequested;
4694 thread->state |= ThreadState_Suspended;
4695 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4696 if (thread->suspend_event == NULL) {
4697 LeaveCriticalSection (thread->synch_cs);
4700 if (thread->suspended_event)
4701 SetEvent (thread->suspended_event);
4703 LeaveCriticalSection (thread->synch_cs);
4705 if (shutting_down) {
4706 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4711 WaitForSingleObject (thread->suspend_event, INFINITE);
4713 EnterCriticalSection (thread->synch_cs);
4715 CloseHandle (thread->suspend_event);
4716 thread->suspend_event = NULL;
4717 thread->state &= ~ThreadState_Suspended;
4719 /* The thread that requested the resume will have replaced this event
4720 * and will be waiting for it
4722 SetEvent (thread->resume_event);
4724 LeaveCriticalSection (thread->synch_cs);
4728 transition_to_suspended (thread);
4729 mono_thread_info_self_suspend ();
4732 /*This is called with @thread synch_cs held and it must release it*/
4734 resume_thread_internal (MonoInternalThread *thread)
4736 if (!mono_thread_info_new_interrupt_enabled ()) {
4737 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4738 if (thread->resume_event == NULL) {
4739 LeaveCriticalSection (thread->synch_cs);
4743 /* Awake the thread */
4744 SetEvent (thread->suspend_event);
4746 LeaveCriticalSection (thread->synch_cs);
4748 /* Wait for the thread to awake */
4749 WaitForSingleObject (thread->resume_event, INFINITE);
4750 CloseHandle (thread->resume_event);
4751 thread->resume_event = NULL;
4755 LeaveCriticalSection (thread->synch_cs);
4756 /* Awake the thread */
4757 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4759 EnterCriticalSection (thread->synch_cs);
4760 thread->state &= ~ThreadState_Suspended;
4761 LeaveCriticalSection (thread->synch_cs);