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, gboolean force_attach)
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);
257 if (shutting_down && !force_attach) {
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, FALSE))
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 offset)
820 // __asm__("movl %%fs:%a[offset], %k[value]" : [value] "=q" (value) : [offset] "irm" (offset));
821 __asm__ volatile ("movl %%fs:%1,%0"
822 : "=r" (value) ,"=m" ((*(volatile long *) offset)));
828 * mono_thread_get_stack_bounds:
830 * Return the address and size of the current threads stack. Return NULL as the
831 * stack address if the stack address cannot be determined.
834 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
836 #if defined(HOST_WIN32)
838 /* http://en.wikipedia.org/wiki/Win32_Thread_Information_Block */
839 void* tib = (void*)__readfsdword(0x18);
840 guint8 *stackTop = (guint8*)*(int*)((char*)tib + 4);
841 guint8 *stackBottom = (guint8*)*(int*)((char*)tib + 8);
843 *staddr = stackBottom;
844 *stsize = stackTop - stackBottom;
847 #elif defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
849 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self());
850 *stsize = pthread_get_stacksize_np (pthread_self());
852 /* staddr points to the start of the stack, not the end */
855 /* When running under emacs, sometimes staddr is not aligned to a page size */
856 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize() - 1));
859 #elif (defined(HAVE_PTHREAD_GETATTR_NP) || defined(HAVE_PTHREAD_ATTR_GET_NP)) && defined(HAVE_PTHREAD_ATTR_GETSTACK)
863 guint8 *current = (guint8*)&attr;
866 *stsize = (size_t)-1;
868 pthread_attr_init (&attr);
870 #if defined(HAVE_PTHREAD_GETATTR_NP)
872 pthread_getattr_np (pthread_self(), &attr);
874 #elif defined(HAVE_PTHREAD_ATTR_GET_NP)
876 pthread_attr_get_np (pthread_self(), &attr);
879 #error Cannot determine which API is needed to retrieve pthread attributes.
882 pthread_attr_getstack (&attr, (void**)staddr, stsize);
883 pthread_attr_destroy (&attr);
886 g_assert ((current > *staddr) && (current < *staddr + *stsize));
888 /* When running under emacs, sometimes staddr is not aligned to a page size */
889 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
892 #elif defined(__OpenBSD__)
894 /* TODO : Determine if this code is actually still needed. It may already be covered by the case above. */
897 guint8 *current = (guint8*)&attr;
900 *stsize = (size_t)-1;
902 pthread_attr_init (&attr);
907 rslt = pthread_stackseg_np(pthread_self(), &ss);
908 g_assert (rslt == 0);
910 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
911 *stsize = ss.ss_size;
913 pthread_attr_destroy (&attr);
916 g_assert ((current > *staddr) && (current < *staddr + *stsize));
918 /* When running under emacs, sometimes staddr is not aligned to a page size */
919 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
922 #elif defined(sun) || defined(__native_client__)
923 /* Solaris/Illumos, NaCl */
925 pthread_attr_init (&attr);
926 pthread_attr_getstacksize (&attr, &stsize);
927 pthread_attr_destroy (&attr);
932 /* FIXME: It'd be better to use the 'error' preprocessor macro here so we know
933 at compile-time if the target platform isn't supported. */
934 #warning "Unable to determine how to retrieve a thread's stack-bounds for this platform in 'mono_thread_get_stack_bounds()'."
942 mono_thread_attach (MonoDomain *domain)
944 return mono_thread_attach_full (domain, FALSE);
948 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
950 MonoThreadInfo *info;
951 MonoInternalThread *thread;
952 MonoThread *current_thread;
953 HANDLE thread_handle;
956 if ((thread = mono_thread_internal_current ())) {
957 if (domain != mono_domain_get ())
958 mono_domain_set (domain, TRUE);
959 /* Already attached */
960 return mono_thread_current ();
963 if (!mono_gc_register_thread (&domain)) {
964 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 ());
967 thread = create_internal_thread_object ();
969 thread_handle = GetCurrentThread ();
970 g_assert (thread_handle);
972 tid=GetCurrentThreadId ();
975 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
976 * refer to the thread from other threads for things like aborting.
978 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
979 THREAD_ALL_ACCESS, TRUE, 0);
981 thread->handle=thread_handle;
983 #ifdef PLATFORM_ANDROID
984 thread->android_tid = (gpointer) gettid ();
986 thread->apartment_state=ThreadApartmentState_Unknown;
987 thread->managed_id = get_next_managed_thread_id ();
988 if (mono_gc_is_moving ()) {
989 thread->thread_pinning_ref = thread;
990 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
993 thread->stack_ptr = &tid;
995 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
996 InitializeCriticalSection (thread->synch_cs);
998 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1000 info = mono_thread_info_current ();
1002 thread->thread_info = info;
1004 current_thread = new_thread_with_internal (domain, thread);
1006 if (!handle_store (current_thread, force_attach)) {
1007 /* Mono is shutting down, so just wait for the end */
1012 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
1014 SET_CURRENT_OBJECT (thread);
1015 mono_domain_set (domain, TRUE);
1017 mono_monitor_init_tls ();
1019 thread_adjust_static_data (thread);
1021 init_root_domain_thread (thread, current_thread);
1022 if (domain != mono_get_root_domain ())
1023 set_current_thread_for_domain (domain, thread, current_thread);
1026 if (mono_thread_attach_cb) {
1030 mono_thread_get_stack_bounds (&staddr, &stsize);
1033 mono_thread_attach_cb (tid, &tid);
1035 mono_thread_attach_cb (tid, staddr + stsize);
1038 // FIXME: Need a separate callback
1039 mono_profiler_thread_start (tid);
1041 return current_thread;
1045 mono_thread_detach (MonoThread *thread)
1047 g_return_if_fail (thread != NULL);
1049 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
1051 thread_cleanup (thread->internal_thread);
1053 SET_CURRENT_OBJECT (NULL);
1054 mono_domain_unset ();
1056 /* Don't need to CloseHandle this thread, even though we took a
1057 * reference in mono_thread_attach (), because the GC will do it
1058 * when the Thread object is finalised.
1065 MonoInternalThread *thread = mono_thread_internal_current ();
1067 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1069 thread_cleanup (thread);
1070 SET_CURRENT_OBJECT (NULL);
1071 mono_domain_unset ();
1073 /* we could add a callback here for embedders to use. */
1074 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1075 exit (mono_environment_exitcode_get ());
1080 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1082 MonoInternalThread *internal = create_internal_thread_object ();
1084 internal->state = ThreadState_Unstarted;
1085 internal->apartment_state = ThreadApartmentState_Unknown;
1086 internal->managed_id = get_next_managed_thread_id ();
1088 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1091 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
1094 guint32 (*start_func)(void *);
1095 struct StartInfo *start_info;
1098 MonoInternalThread *internal;
1100 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1102 if (!this->internal_thread)
1103 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1104 internal = this->internal_thread;
1106 ensure_synch_cs_set (internal);
1108 EnterCriticalSection (internal->synch_cs);
1110 if ((internal->state & ThreadState_Unstarted) == 0) {
1111 LeaveCriticalSection (internal->synch_cs);
1112 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1116 if ((internal->state & ThreadState_Aborted) != 0) {
1117 LeaveCriticalSection (internal->synch_cs);
1122 /* This is freed in start_wrapper */
1123 start_info = g_new0 (struct StartInfo, 1);
1124 start_info->func = start_func;
1125 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1126 start_info->delegate = start;
1127 start_info->obj = this;
1128 g_assert (this->obj.vtable->domain == mono_domain_get ());
1130 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1131 if (internal->start_notify==NULL) {
1132 LeaveCriticalSection (internal->synch_cs);
1133 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1134 g_free (start_info);
1138 mono_threads_lock ();
1139 register_thread_start_argument (this, start_info);
1140 if (threads_starting_up == NULL) {
1141 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1142 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1144 mono_g_hash_table_insert (threads_starting_up, this, this);
1145 mono_threads_unlock ();
1147 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1148 CREATE_SUSPENDED, &tid);
1150 LeaveCriticalSection (internal->synch_cs);
1151 mono_threads_lock ();
1152 mono_g_hash_table_remove (threads_starting_up, this);
1153 mono_threads_unlock ();
1154 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1158 internal->handle=thread;
1160 if (mono_gc_is_moving ()) {
1161 internal->thread_pinning_ref = internal;
1162 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1166 /* Don't call handle_store() here, delay it to Start.
1167 * We can't join a thread (trying to will just block
1168 * forever) until it actually starts running, so don't
1169 * store the handle till then.
1172 mono_thread_start (this);
1174 internal->state &= ~ThreadState_Unstarted;
1176 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1178 LeaveCriticalSection (internal->synch_cs);
1183 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1185 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1188 CloseHandle (thread);
1190 if (this->synch_cs) {
1191 CRITICAL_SECTION *synch_cs = this->synch_cs;
1192 this->synch_cs = NULL;
1193 DeleteCriticalSection (synch_cs);
1198 void *name = this->name;
1204 static void mono_thread_start (MonoThread *thread)
1206 MonoInternalThread *internal = thread->internal_thread;
1208 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1210 /* Only store the handle when the thread is about to be
1211 * launched, to avoid the main thread deadlocking while trying
1212 * to clean up a thread that will never be signalled.
1214 if (!handle_store (thread, FALSE))
1217 ResumeThread (internal->handle);
1219 if(internal->start_notify!=NULL) {
1220 /* Wait for the thread to set up its TLS data etc, so
1221 * theres no potential race condition if someone tries
1222 * to look up the data believing the thread has
1226 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1228 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1229 CloseHandle (internal->start_notify);
1230 internal->start_notify = NULL;
1233 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1236 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1239 MonoInternalThread *thread = mono_thread_internal_current ();
1241 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1243 mono_thread_current_check_pending_interrupt ();
1246 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1248 res = SleepEx(ms,TRUE);
1250 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1252 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1253 MonoException* exc = mono_thread_execute_interruption (thread);
1255 mono_raise_exception (exc);
1267 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1272 ves_icall_System_Threading_Thread_GetDomainID (void)
1274 return mono_domain_get()->domain_id;
1278 ves_icall_System_Threading_Thread_Yield (void)
1281 return SwitchToThread ();
1283 return sched_yield () == 0;
1288 * mono_thread_get_name:
1290 * Return the name of the thread. NAME_LEN is set to the length of the name.
1291 * Return NULL if the thread has no name. The returned memory is owned by the
1295 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1299 ensure_synch_cs_set (this_obj);
1301 EnterCriticalSection (this_obj->synch_cs);
1303 if (!this_obj->name) {
1307 *name_len = this_obj->name_len;
1308 res = g_new (gunichar2, this_obj->name_len);
1309 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1312 LeaveCriticalSection (this_obj->synch_cs);
1318 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1322 ensure_synch_cs_set (this_obj);
1324 EnterCriticalSection (this_obj->synch_cs);
1326 if (!this_obj->name)
1329 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1331 LeaveCriticalSection (this_obj->synch_cs);
1337 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1339 ensure_synch_cs_set (this_obj);
1341 EnterCriticalSection (this_obj->synch_cs);
1343 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1344 LeaveCriticalSection (this_obj->synch_cs);
1346 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1350 this_obj->name = g_new (gunichar2, mono_string_length (name));
1351 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1352 this_obj->name_len = mono_string_length (name);
1355 this_obj->name = NULL;
1358 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1360 LeaveCriticalSection (this_obj->synch_cs);
1361 if (this_obj->name) {
1362 char *tname = mono_string_to_utf8 (name);
1363 mono_profiler_thread_name (this_obj->tid, tname);
1369 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1371 mono_thread_set_name_internal (this_obj, name, TRUE);
1374 /* If the array is already in the requested domain, we just return it,
1375 otherwise we return a copy in that domain. */
1377 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1384 if (mono_object_domain (arr) == domain)
1387 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1388 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1393 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1395 return byte_array_to_domain (arr, mono_get_root_domain ());
1399 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1401 return byte_array_to_domain (arr, mono_domain_get ());
1405 mono_thread_current (void)
1407 MonoDomain *domain = mono_domain_get ();
1408 MonoInternalThread *internal = mono_thread_internal_current ();
1409 MonoThread **current_thread_ptr;
1411 g_assert (internal);
1412 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1414 if (!*current_thread_ptr) {
1415 g_assert (domain != mono_get_root_domain ());
1416 *current_thread_ptr = new_thread_with_internal (domain, internal);
1418 return *current_thread_ptr;
1422 mono_thread_internal_current (void)
1424 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1425 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1429 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1430 int ms, HANDLE thread)
1432 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1435 mono_thread_current_check_pending_interrupt ();
1437 ensure_synch_cs_set (this);
1439 EnterCriticalSection (this->synch_cs);
1441 if ((this->state & ThreadState_Unstarted) != 0) {
1442 LeaveCriticalSection (this->synch_cs);
1444 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1448 LeaveCriticalSection (this->synch_cs);
1453 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1455 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1457 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1459 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1461 if(ret==WAIT_OBJECT_0) {
1462 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1467 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1473 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1481 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1484 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1486 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1488 if (ret != WAIT_IO_COMPLETION)
1491 exc = mono_thread_execute_interruption (thread);
1493 mono_raise_exception (exc);
1498 /* Re-calculate ms according to the time passed */
1499 diff_ms = (mono_100ns_ticks () - start) / 10000;
1500 if (diff_ms >= ms) {
1504 wait = ms - diff_ms;
1510 /* FIXME: exitContext isnt documented */
1511 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1517 MonoObject *waitHandle;
1518 MonoInternalThread *thread = mono_thread_internal_current ();
1520 /* Do this WaitSleepJoin check before creating objects */
1521 mono_thread_current_check_pending_interrupt ();
1523 numhandles = mono_array_length(mono_handles);
1524 handles = g_new0(HANDLE, numhandles);
1526 for(i = 0; i < numhandles; i++) {
1527 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1528 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1535 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1537 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1539 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1543 if(ret==WAIT_FAILED) {
1544 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1546 } else if(ret==WAIT_TIMEOUT) {
1547 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1554 /* FIXME: exitContext isnt documented */
1555 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1557 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1561 MonoObject *waitHandle;
1562 MonoInternalThread *thread = mono_thread_internal_current ();
1564 /* Do this WaitSleepJoin check before creating objects */
1565 mono_thread_current_check_pending_interrupt ();
1567 numhandles = mono_array_length(mono_handles);
1568 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1571 for(i = 0; i < numhandles; i++) {
1572 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1573 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1580 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1582 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1584 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1586 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1589 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1591 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1592 return ret - WAIT_OBJECT_0;
1594 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1595 return ret - WAIT_ABANDONED_0;
1602 /* FIXME: exitContext isnt documented */
1603 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1606 MonoInternalThread *thread = mono_thread_internal_current ();
1608 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1614 mono_thread_current_check_pending_interrupt ();
1616 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1618 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1620 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1622 if(ret==WAIT_FAILED) {
1623 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1625 } else if(ret==WAIT_TIMEOUT) {
1626 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1634 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1637 MonoInternalThread *thread = mono_thread_internal_current ();
1642 mono_thread_current_check_pending_interrupt ();
1644 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1646 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1648 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1650 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1653 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1660 mutex = CreateMutex (NULL, owned, NULL);
1662 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1664 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1672 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1673 return(ReleaseMutex (handle));
1676 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1682 *error = ERROR_SUCCESS;
1684 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1686 *error = GetLastError ();
1693 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1700 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1702 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1703 mono_string_chars (name));
1705 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1713 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1717 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1722 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1726 *error = ERROR_SUCCESS;
1728 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1730 *error = GetLastError ();
1736 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1743 event = CreateEvent (NULL, manual, initial, NULL);
1745 event = CreateEvent (NULL, manual, initial,
1746 mono_string_chars (name));
1748 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1756 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1757 return (SetEvent(handle));
1760 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1761 return (ResetEvent(handle));
1765 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1766 CloseHandle (handle);
1769 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1775 *error = ERROR_SUCCESS;
1777 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1779 *error = GetLastError ();
1785 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1787 return InterlockedIncrement (location);
1790 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1794 mono_interlocked_lock ();
1798 mono_interlocked_unlock ();
1804 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1806 return InterlockedDecrement(location);
1809 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1813 mono_interlocked_lock ();
1817 mono_interlocked_unlock ();
1822 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1824 return InterlockedExchange(location, value);
1827 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1830 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1831 mono_gc_wbarrier_generic_nostore (location);
1835 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1837 return InterlockedExchangePointer(location, value);
1840 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1842 IntFloatUnion val, ret;
1845 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1851 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1853 #if SIZEOF_VOID_P == 8
1854 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1859 * According to MSDN, this function is only atomic with regards to the
1860 * other Interlocked functions on 32 bit platforms.
1862 mono_interlocked_lock ();
1865 mono_interlocked_unlock ();
1872 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1874 #if SIZEOF_VOID_P == 8
1875 LongDoubleUnion val, ret;
1878 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1885 * According to MSDN, this function is only atomic with regards to the
1886 * other Interlocked functions on 32 bit platforms.
1888 mono_interlocked_lock ();
1891 mono_interlocked_unlock ();
1897 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1899 return InterlockedCompareExchange(location, value, comparand);
1902 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1905 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1906 mono_gc_wbarrier_generic_nostore (location);
1910 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1912 return InterlockedCompareExchangePointer(location, value, comparand);
1915 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1917 IntFloatUnion val, ret, cmp;
1920 cmp.fval = comparand;
1921 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1927 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1929 #if SIZEOF_VOID_P == 8
1930 LongDoubleUnion val, comp, ret;
1933 comp.fval = comparand;
1934 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1940 mono_interlocked_lock ();
1942 if (old == comparand)
1944 mono_interlocked_unlock ();
1951 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1953 #if SIZEOF_VOID_P == 4
1954 if ((size_t)location & 0x7) {
1956 mono_interlocked_lock ();
1958 if (old == comparand)
1960 mono_interlocked_unlock ();
1964 return InterlockedCompareExchange64 (location, value, comparand);
1968 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1971 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1972 mono_gc_wbarrier_generic_nostore (location);
1977 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1980 res = InterlockedExchangePointer ((gpointer *)location, value);
1981 mono_gc_wbarrier_generic_nostore (location);
1986 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1988 #if SIZEOF_VOID_P == 8
1989 /* Should be implemented as a JIT intrinsic */
1990 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1995 mono_interlocked_lock ();
1997 *location = orig + value;
1998 mono_interlocked_unlock ();
2000 return orig + value;
2005 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2007 #if SIZEOF_VOID_P == 8
2008 /* Should be implemented as a JIT intrinsic */
2009 mono_raise_exception (mono_get_exception_not_implemented (NULL));
2014 mono_interlocked_lock ();
2016 *location = orig + value;
2017 mono_interlocked_unlock ();
2019 return orig + value;
2024 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2026 return InterlockedRead64 (location);
2030 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2032 mono_memory_barrier ();
2036 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
2038 mono_thread_clr_state (this, state);
2040 if (state & ThreadState_Background) {
2041 /* If the thread changes the background mode, the main thread has to
2042 * be notified, since it has to rebuild the list of threads to
2045 SetEvent (background_change_event);
2050 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2052 mono_thread_set_state (this, state);
2054 if (state & ThreadState_Background) {
2055 /* If the thread changes the background mode, the main thread has to
2056 * be notified, since it has to rebuild the list of threads to
2059 SetEvent (background_change_event);
2064 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2068 ensure_synch_cs_set (this);
2070 EnterCriticalSection (this->synch_cs);
2072 state = this->state;
2074 LeaveCriticalSection (this->synch_cs);
2079 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2081 MonoInternalThread *current;
2084 ensure_synch_cs_set (this);
2086 current = mono_thread_internal_current ();
2088 EnterCriticalSection (this->synch_cs);
2090 this->thread_interrupt_requested = TRUE;
2091 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2093 LeaveCriticalSection (this->synch_cs);
2096 abort_thread_internal (this, TRUE, FALSE);
2100 void mono_thread_current_check_pending_interrupt ()
2102 MonoInternalThread *thread = mono_thread_internal_current ();
2103 gboolean throw = FALSE;
2105 mono_debugger_check_interruption ();
2107 ensure_synch_cs_set (thread);
2109 EnterCriticalSection (thread->synch_cs);
2111 if (thread->thread_interrupt_requested) {
2113 thread->thread_interrupt_requested = FALSE;
2116 LeaveCriticalSection (thread->synch_cs);
2119 mono_raise_exception (mono_get_exception_thread_interrupted ());
2124 mono_thread_get_abort_signal (void)
2128 #elif defined(PLATFORM_ANDROID)
2130 #elif !defined (SIGRTMIN)
2135 #endif /* SIGUSR1 */
2137 static int abort_signum = -1;
2139 if (abort_signum != -1)
2140 return abort_signum;
2141 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2142 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2143 struct sigaction sinfo;
2144 sigaction (i, NULL, &sinfo);
2145 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2150 /* fallback to the old way */
2152 #endif /* HOST_WIN32 */
2156 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2158 MonoException* exc = mono_thread_request_interruption (FALSE);
2159 if (exc) mono_raise_exception (exc);
2161 #endif /* HOST_WIN32 */
2164 * signal_thread_state_change
2166 * Tells the thread that his state has changed and it has to enter the new
2167 * state as soon as possible.
2169 static void signal_thread_state_change (MonoInternalThread *thread)
2171 if (thread == mono_thread_internal_current ()) {
2172 /* Do it synchronously */
2173 MonoException *exc = mono_thread_request_interruption (FALSE);
2175 mono_raise_exception (exc);
2179 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2181 /* fixme: store the state somewhere */
2182 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2185 * This will cause waits to be broken.
2186 * It will also prevent the thread from entering a wait, so if the thread returns
2187 * from the wait before it receives the abort signal, it will just spin in the wait
2188 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2191 wapi_interrupt_thread (thread->handle);
2192 #endif /* HOST_WIN32 */
2196 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2198 ensure_synch_cs_set (thread);
2200 EnterCriticalSection (thread->synch_cs);
2202 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2203 (thread->state & ThreadState_StopRequested) != 0 ||
2204 (thread->state & ThreadState_Stopped) != 0)
2206 LeaveCriticalSection (thread->synch_cs);
2210 if ((thread->state & ThreadState_Unstarted) != 0) {
2211 thread->state |= ThreadState_Aborted;
2212 LeaveCriticalSection (thread->synch_cs);
2216 thread->state |= ThreadState_AbortRequested;
2217 if (thread->abort_state_handle)
2218 mono_gchandle_free (thread->abort_state_handle);
2220 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2221 g_assert (thread->abort_state_handle);
2223 thread->abort_state_handle = 0;
2225 thread->abort_exc = NULL;
2228 * abort_exc is set in mono_thread_execute_interruption(),
2229 * triggered by the call to signal_thread_state_change(),
2230 * below. There's a point between where we have
2231 * abort_state_handle set, but abort_exc NULL, but that's not
2235 LeaveCriticalSection (thread->synch_cs);
2237 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2239 /* During shutdown, we can't wait for other threads */
2241 /* Make sure the thread is awake */
2242 mono_thread_resume (thread);
2244 abort_thread_internal (thread, TRUE, TRUE);
2248 ves_icall_System_Threading_Thread_ResetAbort (void)
2250 MonoInternalThread *thread = mono_thread_internal_current ();
2251 gboolean was_aborting;
2253 ensure_synch_cs_set (thread);
2255 EnterCriticalSection (thread->synch_cs);
2256 was_aborting = thread->state & ThreadState_AbortRequested;
2257 thread->state &= ~ThreadState_AbortRequested;
2258 LeaveCriticalSection (thread->synch_cs);
2260 if (!was_aborting) {
2261 const char *msg = "Unable to reset abort because no abort was requested";
2262 mono_raise_exception (mono_get_exception_thread_state (msg));
2264 thread->abort_exc = NULL;
2265 if (thread->abort_state_handle) {
2266 mono_gchandle_free (thread->abort_state_handle);
2267 /* This is actually not necessary - the handle
2268 only counts if the exception is set */
2269 thread->abort_state_handle = 0;
2274 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2276 ensure_synch_cs_set (thread);
2278 EnterCriticalSection (thread->synch_cs);
2280 thread->state &= ~ThreadState_AbortRequested;
2282 if (thread->abort_exc) {
2283 thread->abort_exc = NULL;
2284 if (thread->abort_state_handle) {
2285 mono_gchandle_free (thread->abort_state_handle);
2286 /* This is actually not necessary - the handle
2287 only counts if the exception is set */
2288 thread->abort_state_handle = 0;
2292 LeaveCriticalSection (thread->synch_cs);
2296 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2298 MonoInternalThread *thread = this->internal_thread;
2299 MonoObject *state, *deserialized = NULL, *exc;
2302 if (!thread->abort_state_handle)
2305 state = mono_gchandle_get_target (thread->abort_state_handle);
2308 domain = mono_domain_get ();
2309 if (mono_object_domain (state) == domain)
2312 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2314 if (!deserialized) {
2315 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2317 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2318 mono_raise_exception (invalid_op_exc);
2321 return deserialized;
2325 mono_thread_suspend (MonoInternalThread *thread)
2327 ensure_synch_cs_set (thread);
2329 EnterCriticalSection (thread->synch_cs);
2331 if ((thread->state & ThreadState_Unstarted) != 0 ||
2332 (thread->state & ThreadState_Aborted) != 0 ||
2333 (thread->state & ThreadState_Stopped) != 0)
2335 LeaveCriticalSection (thread->synch_cs);
2339 if ((thread->state & ThreadState_Suspended) != 0 ||
2340 (thread->state & ThreadState_SuspendRequested) != 0 ||
2341 (thread->state & ThreadState_StopRequested) != 0)
2343 LeaveCriticalSection (thread->synch_cs);
2347 thread->state |= ThreadState_SuspendRequested;
2349 LeaveCriticalSection (thread->synch_cs);
2351 suspend_thread_internal (thread, FALSE);
2356 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2358 if (!mono_thread_suspend (thread))
2359 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2363 mono_thread_resume (MonoInternalThread *thread)
2365 ensure_synch_cs_set (thread);
2367 EnterCriticalSection (thread->synch_cs);
2369 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2370 thread->state &= ~ThreadState_SuspendRequested;
2371 LeaveCriticalSection (thread->synch_cs);
2375 if ((thread->state & ThreadState_Suspended) == 0 ||
2376 (thread->state & ThreadState_Unstarted) != 0 ||
2377 (thread->state & ThreadState_Aborted) != 0 ||
2378 (thread->state & ThreadState_Stopped) != 0)
2380 LeaveCriticalSection (thread->synch_cs);
2384 return resume_thread_internal (thread);
2388 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2390 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2391 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2395 mono_threads_is_critical_method (MonoMethod *method)
2397 switch (method->wrapper_type) {
2398 case MONO_WRAPPER_RUNTIME_INVOKE:
2399 case MONO_WRAPPER_XDOMAIN_INVOKE:
2400 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2407 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2412 if (mono_threads_is_critical_method (m)) {
2413 *((gboolean*)data) = TRUE;
2420 is_running_protected_wrapper (void)
2422 gboolean found = FALSE;
2423 mono_stack_walk (find_wrapper, &found);
2427 void mono_thread_internal_stop (MonoInternalThread *thread)
2429 ensure_synch_cs_set (thread);
2431 EnterCriticalSection (thread->synch_cs);
2433 if ((thread->state & ThreadState_StopRequested) != 0 ||
2434 (thread->state & ThreadState_Stopped) != 0)
2436 LeaveCriticalSection (thread->synch_cs);
2440 /* Make sure the thread is awake */
2441 mono_thread_resume (thread);
2443 thread->state |= ThreadState_StopRequested;
2444 thread->state &= ~ThreadState_AbortRequested;
2446 LeaveCriticalSection (thread->synch_cs);
2448 abort_thread_internal (thread, TRUE, TRUE);
2451 void mono_thread_stop (MonoThread *thread)
2453 mono_thread_internal_stop (thread->internal_thread);
2457 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2459 return *((volatile gint8 *) (ptr));
2463 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2465 return *((volatile gint16 *) (ptr));
2469 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2471 return *((volatile gint32 *) (ptr));
2475 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2477 #if SIZEOF_VOID_P == 8
2478 return *((volatile gint64 *) (ptr));
2480 if ((size_t)ptr & 0x7) {
2482 mono_interlocked_lock ();
2483 value = *(gint64 *)ptr;
2484 mono_interlocked_unlock ();
2487 return InterlockedCompareExchange64 (ptr, 0, 0); /*Must ensure atomicity of the operation. */
2492 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2494 return (void *) *((volatile void **) ptr);
2498 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2500 return *((volatile double *) (ptr));
2504 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2506 return *((volatile float *) (ptr));
2510 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2512 return (MonoObject*)*((volatile MonoObject**)ptr);
2516 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2518 *((volatile gint8 *) ptr) = value;
2522 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2524 *((volatile gint16 *) ptr) = value;
2528 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2530 *((volatile gint32 *) ptr) = value;
2534 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2536 *((volatile gint64 *) ptr) = value;
2540 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2542 *((volatile void **) ptr) = value;
2546 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2548 mono_gc_wbarrier_generic_store (ptr, value);
2552 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2554 *((volatile double *) ptr) = value;
2558 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2560 *((volatile float *) ptr) = value;
2564 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2566 *((volatile MonoObject **) ptr) = value;
2567 mono_gc_wbarrier_generic_nostore (ptr);
2571 mono_thread_init_tls (void)
2573 MONO_FAST_TLS_INIT (tls_current_object);
2574 mono_native_tls_alloc (¤t_object_key, NULL);
2577 void mono_thread_init (MonoThreadStartCB start_cb,
2578 MonoThreadAttachCB attach_cb)
2580 InitializeCriticalSection(&threads_mutex);
2581 InitializeCriticalSection(&interlocked_mutex);
2582 InitializeCriticalSection(&contexts_mutex);
2584 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2585 g_assert(background_change_event != NULL);
2587 mono_init_static_data_info (&thread_static_info);
2588 mono_init_static_data_info (&context_static_info);
2590 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2592 mono_thread_start_cb = start_cb;
2593 mono_thread_attach_cb = attach_cb;
2595 /* Get a pseudo handle to the current process. This is just a
2596 * kludge so that wapi can build a process handle if needed.
2597 * As a pseudo handle is returned, we don't need to clean
2600 GetCurrentProcess ();
2603 void mono_thread_cleanup (void)
2605 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2606 /* The main thread must abandon any held mutexes (particularly
2607 * important for named mutexes as they are shared across
2608 * processes, see bug 74680.) This will happen when the
2609 * thread exits, but if it's not running in a subthread it
2610 * won't exit in time.
2612 /* Using non-w32 API is a nasty kludge, but I couldn't find
2613 * anything in the documentation that would let me do this
2614 * here yet still be safe to call on windows.
2616 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2620 /* This stuff needs more testing, it seems one of these
2621 * critical sections can be locked when mono_thread_cleanup is
2624 DeleteCriticalSection (&threads_mutex);
2625 DeleteCriticalSection (&interlocked_mutex);
2626 DeleteCriticalSection (&contexts_mutex);
2627 DeleteCriticalSection (&delayed_free_table_mutex);
2628 DeleteCriticalSection (&small_id_mutex);
2629 CloseHandle (background_change_event);
2632 mono_native_tls_free (current_object_key);
2636 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2638 mono_thread_cleanup_fn = func;
2642 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2644 thread->internal_thread->manage_callback = func;
2647 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2649 mono_thread_notify_pending_exc_fn = func;
2653 static void print_tids (gpointer key, gpointer value, gpointer user)
2655 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2656 * sizeof(uint) and a cast to uint would overflow
2658 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2659 * print this as a pointer.
2661 g_message ("Waiting for: %p", key);
2666 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2667 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2671 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2675 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2677 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2679 if(ret==WAIT_FAILED) {
2680 /* See the comment in build_wait_tids() */
2681 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2685 for(i=0; i<wait->num; i++)
2686 CloseHandle (wait->handles[i]);
2688 if (ret == WAIT_TIMEOUT)
2691 for(i=0; i<wait->num; i++) {
2692 gsize tid = wait->threads[i]->tid;
2694 mono_threads_lock ();
2695 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2696 /* This thread must have been killed, because
2697 * it hasn't cleaned itself up. (It's just
2698 * possible that the thread exited before the
2699 * parent thread had a chance to store the
2700 * handle, and now there is another pointer to
2701 * the already-exited thread stored. In this
2702 * case, we'll just get two
2703 * mono_profiler_thread_end() calls for the
2707 mono_threads_unlock ();
2708 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2709 thread_cleanup (wait->threads[i]);
2711 mono_threads_unlock ();
2716 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2718 guint32 i, ret, count;
2720 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2722 /* Add the thread state change event, so it wakes up if a thread changes
2723 * to background mode.
2726 if (count < MAXIMUM_WAIT_OBJECTS) {
2727 wait->handles [count] = background_change_event;
2731 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2733 if(ret==WAIT_FAILED) {
2734 /* See the comment in build_wait_tids() */
2735 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2739 for(i=0; i<wait->num; i++)
2740 CloseHandle (wait->handles[i]);
2742 if (ret == WAIT_TIMEOUT)
2745 if (ret < wait->num) {
2746 gsize tid = wait->threads[ret]->tid;
2747 mono_threads_lock ();
2748 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2749 /* See comment in wait_for_tids about thread cleanup */
2750 mono_threads_unlock ();
2751 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2752 thread_cleanup (wait->threads [ret]);
2754 mono_threads_unlock ();
2758 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2760 struct wait_data *wait=(struct wait_data *)user;
2762 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2764 MonoInternalThread *thread=(MonoInternalThread *)value;
2766 /* Ignore background threads, we abort them later */
2767 /* Do not lock here since it is not needed and the caller holds threads_lock */
2768 if (thread->state & ThreadState_Background) {
2769 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2770 return; /* just leave, ignore */
2773 if (mono_gc_is_finalizer_internal_thread (thread)) {
2774 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2778 if (thread == mono_thread_internal_current ()) {
2779 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2783 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2784 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2788 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2789 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2793 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2794 if (handle == NULL) {
2795 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2799 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2800 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2801 wait->handles[wait->num]=handle;
2802 wait->threads[wait->num]=thread;
2805 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2807 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2812 /* Just ignore the rest, we can't do anything with
2819 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2821 struct wait_data *wait=(struct wait_data *)user;
2822 gsize self = GetCurrentThreadId ();
2823 MonoInternalThread *thread = value;
2826 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2829 /* The finalizer thread is not a background thread */
2830 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2831 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2833 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2837 /* printf ("A: %d\n", wait->num); */
2838 wait->handles[wait->num]=thread->handle;
2839 wait->threads[wait->num]=thread;
2842 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2843 mono_thread_internal_stop (thread);
2847 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2851 * mono_threads_set_shutting_down:
2853 * Is called by a thread that wants to shut down Mono. If the runtime is already
2854 * shutting down, the calling thread is suspended/stopped, and this function never
2858 mono_threads_set_shutting_down (void)
2860 MonoInternalThread *current_thread = mono_thread_internal_current ();
2862 mono_threads_lock ();
2864 if (shutting_down) {
2865 mono_threads_unlock ();
2867 /* Make sure we're properly suspended/stopped */
2869 EnterCriticalSection (current_thread->synch_cs);
2871 if ((current_thread->state & ThreadState_SuspendRequested) ||
2872 (current_thread->state & ThreadState_AbortRequested) ||
2873 (current_thread->state & ThreadState_StopRequested)) {
2874 LeaveCriticalSection (current_thread->synch_cs);
2875 mono_thread_execute_interruption (current_thread);
2877 current_thread->state |= ThreadState_Stopped;
2878 LeaveCriticalSection (current_thread->synch_cs);
2881 /*since we're killing the thread, unset the current domain.*/
2882 mono_domain_unset ();
2884 /* Wake up other threads potentially waiting for us */
2887 shutting_down = TRUE;
2889 /* Not really a background state change, but this will
2890 * interrupt the main thread if it is waiting for all
2891 * the other threads.
2893 SetEvent (background_change_event);
2895 mono_threads_unlock ();
2899 void mono_thread_manage (void)
2901 struct wait_data wait_data;
2902 struct wait_data *wait = &wait_data;
2904 memset (wait, 0, sizeof (struct wait_data));
2905 /* join each thread that's still running */
2906 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2908 mono_threads_lock ();
2910 THREAD_DEBUG (g_message("%s: No threads", __func__));
2911 mono_threads_unlock ();
2914 mono_threads_unlock ();
2917 mono_threads_lock ();
2918 if (shutting_down) {
2919 /* somebody else is shutting down */
2920 mono_threads_unlock ();
2923 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2924 mono_g_hash_table_foreach (threads, print_tids, NULL));
2926 ResetEvent (background_change_event);
2928 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2929 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2930 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2931 mono_threads_unlock ();
2933 /* Something to wait for */
2934 wait_for_tids_or_state_change (wait, INFINITE);
2936 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2937 } while(wait->num>0);
2939 /* Mono is shutting down, so just wait for the end */
2940 if (!mono_runtime_try_shutdown ()) {
2941 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2942 mono_thread_suspend (mono_thread_internal_current ());
2943 mono_thread_execute_interruption (mono_thread_internal_current ());
2947 * Remove everything but the finalizer thread and self.
2948 * Also abort all the background threads
2951 mono_threads_lock ();
2954 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2955 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2956 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2958 mono_threads_unlock ();
2960 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2962 /* Something to wait for */
2963 wait_for_tids (wait, INFINITE);
2965 } while (wait->num > 0);
2968 * give the subthreads a chance to really quit (this is mainly needed
2969 * to get correct user and system times from getrusage/wait/time(1)).
2970 * This could be removed if we avoid pthread_detach() and use pthread_join().
2977 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2979 MonoInternalThread *thread=(MonoInternalThread *)value;
2981 if(thread->tid != (gsize)user) {
2982 /*TerminateThread (thread->handle, -1);*/
2986 void mono_thread_abort_all_other_threads (void)
2988 gsize self = GetCurrentThreadId ();
2990 mono_threads_lock ();
2991 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2992 mono_g_hash_table_size (threads));
2993 mono_g_hash_table_foreach (threads, print_tids, NULL));
2995 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2997 mono_threads_unlock ();
3001 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3003 MonoInternalThread *thread = (MonoInternalThread*)value;
3004 struct wait_data *wait = (struct wait_data*)user_data;
3008 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3010 * This needs no locking.
3012 if ((thread->state & ThreadState_Suspended) != 0 ||
3013 (thread->state & ThreadState_Stopped) != 0)
3016 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3017 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3021 wait->handles [wait->num] = handle;
3022 wait->threads [wait->num] = thread;
3028 * mono_thread_suspend_all_other_threads:
3030 * Suspend all managed threads except the finalizer thread and this thread. It is
3031 * not possible to resume them later.
3033 void mono_thread_suspend_all_other_threads (void)
3035 struct wait_data wait_data;
3036 struct wait_data *wait = &wait_data;
3038 gsize self = GetCurrentThreadId ();
3040 guint32 eventidx = 0;
3041 gboolean starting, finished;
3043 memset (wait, 0, sizeof (struct wait_data));
3045 * The other threads could be in an arbitrary state at this point, i.e.
3046 * they could be starting up, shutting down etc. This means that there could be
3047 * threads which are not even in the threads hash table yet.
3051 * First we set a barrier which will be checked by all threads before they
3052 * are added to the threads hash table, and they will exit if the flag is set.
3053 * This ensures that no threads could be added to the hash later.
3054 * We will use shutting_down as the barrier for now.
3056 g_assert (shutting_down);
3059 * We make multiple calls to WaitForMultipleObjects since:
3060 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3061 * - some threads could exit without becoming suspended
3066 * Make a copy of the hashtable since we can't do anything with
3067 * threads while threads_mutex is held.
3070 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3071 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3072 mono_threads_lock ();
3073 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3074 mono_threads_unlock ();
3076 events = g_new0 (gpointer, wait->num);
3078 /* Get the suspended events that we'll be waiting for */
3079 for (i = 0; i < wait->num; ++i) {
3080 MonoInternalThread *thread = wait->threads [i];
3081 gboolean signal_suspend = FALSE;
3083 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3084 //CloseHandle (wait->handles [i]);
3085 wait->threads [i] = NULL; /* ignore this thread in next loop */
3089 ensure_synch_cs_set (thread);
3091 EnterCriticalSection (thread->synch_cs);
3093 if (thread->suspended_event == NULL) {
3094 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3095 if (thread->suspended_event == NULL) {
3096 /* Forget this one and go on to the next */
3097 LeaveCriticalSection (thread->synch_cs);
3102 if ((thread->state & ThreadState_Suspended) != 0 ||
3103 (thread->state & ThreadState_StopRequested) != 0 ||
3104 (thread->state & ThreadState_Stopped) != 0) {
3105 LeaveCriticalSection (thread->synch_cs);
3106 CloseHandle (wait->handles [i]);
3107 wait->threads [i] = NULL; /* ignore this thread in next loop */
3111 if ((thread->state & ThreadState_SuspendRequested) == 0)
3112 signal_suspend = TRUE;
3114 events [eventidx++] = thread->suspended_event;
3116 /* Convert abort requests into suspend requests */
3117 if ((thread->state & ThreadState_AbortRequested) != 0)
3118 thread->state &= ~ThreadState_AbortRequested;
3120 thread->state |= ThreadState_SuspendRequested;
3122 LeaveCriticalSection (thread->synch_cs);
3124 /* Signal the thread to suspend */
3125 if (mono_thread_info_new_interrupt_enabled ())
3126 suspend_thread_internal (thread, TRUE);
3127 else if (signal_suspend)
3128 signal_thread_state_change (thread);
3131 /*Only wait on the suspend event if we are using the old path */
3132 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3133 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3134 for (i = 0; i < wait->num; ++i) {
3135 MonoInternalThread *thread = wait->threads [i];
3140 ensure_synch_cs_set (thread);
3142 EnterCriticalSection (thread->synch_cs);
3143 if ((thread->state & ThreadState_Suspended) != 0) {
3144 CloseHandle (thread->suspended_event);
3145 thread->suspended_event = NULL;
3147 LeaveCriticalSection (thread->synch_cs);
3151 if (eventidx <= 0) {
3153 * If there are threads which are starting up, we wait until they
3154 * are suspended when they try to register in the threads hash.
3155 * This is guaranteed to finish, since the threads which can create new
3156 * threads get suspended after a while.
3157 * FIXME: The finalizer thread can still create new threads.
3159 mono_threads_lock ();
3160 if (threads_starting_up)
3161 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3164 mono_threads_unlock ();
3176 collect_threads (gpointer key, gpointer value, gpointer user_data)
3178 MonoInternalThread *thread = (MonoInternalThread*)value;
3179 struct wait_data *wait = (struct wait_data*)user_data;
3182 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3183 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3187 wait->handles [wait->num] = handle;
3188 wait->threads [wait->num] = thread;
3193 static gboolean thread_dump_requested;
3195 static G_GNUC_UNUSED gboolean
3196 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3198 GString *p = (GString*)data;
3199 MonoMethod *method = NULL;
3201 method = mono_jit_info_get_method (frame->ji);
3204 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3205 g_string_append_printf (p, " %s\n", location);
3208 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3214 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3216 GString* text = g_string_new (0);
3218 GError *error = NULL;
3221 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3223 g_string_append_printf (text, "\n\"%s\"", name);
3226 else if (thread->threadpool_thread)
3227 g_string_append (text, "\n\"<threadpool thread>\"");
3229 g_string_append (text, "\n\"<unnamed thread>\"");
3232 /* This no longer works with remote unwinding */
3234 wapi_desc = wapi_current_thread_desc ();
3235 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3240 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3241 mono_thread_info_resume (mono_thread_info_get_tid (info));
3243 fprintf (stdout, "%s", text->str);
3245 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3246 OutputDebugStringA(text->str);
3249 g_string_free (text, TRUE);
3254 dump_thread (gpointer key, gpointer value, gpointer user)
3256 MonoInternalThread *thread = (MonoInternalThread *)value;
3257 MonoThreadInfo *info;
3259 if (thread == mono_thread_internal_current ())
3263 FIXME This still can hang if we stop a thread during malloc.
3264 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3265 that takes a callback and runs it with the target suspended.
3266 We probably should loop a bit around trying to get it to either managed code
3269 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3274 print_thread_dump (thread, info);
3278 mono_threads_perform_thread_dump (void)
3280 if (!thread_dump_requested)
3283 printf ("Full thread dump:\n");
3286 * Make a copy of the hashtable since we can't do anything with
3287 * threads while threads_mutex is held.
3289 mono_threads_lock ();
3290 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3291 mono_threads_unlock ();
3293 thread_dump_requested = FALSE;
3297 * mono_threads_request_thread_dump:
3299 * Ask all threads except the current to print their stacktrace to stdout.
3302 mono_threads_request_thread_dump (void)
3304 struct wait_data wait_data;
3305 struct wait_data *wait = &wait_data;
3308 /*The new thread dump code runs out of the finalizer thread. */
3309 if (mono_thread_info_new_interrupt_enabled ()) {
3310 thread_dump_requested = TRUE;
3311 mono_gc_finalize_notify ();
3316 memset (wait, 0, sizeof (struct wait_data));
3319 * Make a copy of the hashtable since we can't do anything with
3320 * threads while threads_mutex is held.
3322 mono_threads_lock ();
3323 mono_g_hash_table_foreach (threads, collect_threads, wait);
3324 mono_threads_unlock ();
3326 for (i = 0; i < wait->num; ++i) {
3327 MonoInternalThread *thread = wait->threads [i];
3329 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3330 (thread != mono_thread_internal_current ()) &&
3331 !thread->thread_dump_requested) {
3332 thread->thread_dump_requested = TRUE;
3334 signal_thread_state_change (thread);
3337 CloseHandle (wait->handles [i]);
3343 gint allocated; /* +1 so that refs [allocated] == NULL */
3347 typedef struct ref_stack RefStack;
3350 ref_stack_new (gint initial_size)
3354 initial_size = MAX (initial_size, 16) + 1;
3355 rs = g_new0 (RefStack, 1);
3356 rs->refs = g_new0 (gpointer, initial_size);
3357 rs->allocated = initial_size;
3362 ref_stack_destroy (gpointer ptr)
3373 ref_stack_push (RefStack *rs, gpointer ptr)
3375 g_assert (rs != NULL);
3377 if (rs->bottom >= rs->allocated) {
3378 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3379 rs->allocated <<= 1;
3380 rs->refs [rs->allocated] = NULL;
3382 rs->refs [rs->bottom++] = ptr;
3386 ref_stack_pop (RefStack *rs)
3388 if (rs == NULL || rs->bottom == 0)
3392 rs->refs [rs->bottom] = NULL;
3396 ref_stack_find (RefStack *rs, gpointer ptr)
3403 for (refs = rs->refs; refs && *refs; refs++) {
3411 * mono_thread_push_appdomain_ref:
3413 * Register that the current thread may have references to objects in domain
3414 * @domain on its stack. Each call to this function should be paired with a
3415 * call to pop_appdomain_ref.
3418 mono_thread_push_appdomain_ref (MonoDomain *domain)
3420 MonoInternalThread *thread = mono_thread_internal_current ();
3423 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3424 SPIN_LOCK (thread->lock_thread_id);
3425 if (thread->appdomain_refs == NULL)
3426 thread->appdomain_refs = ref_stack_new (16);
3427 ref_stack_push (thread->appdomain_refs, domain);
3428 SPIN_UNLOCK (thread->lock_thread_id);
3433 mono_thread_pop_appdomain_ref (void)
3435 MonoInternalThread *thread = mono_thread_internal_current ();
3438 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3439 SPIN_LOCK (thread->lock_thread_id);
3440 ref_stack_pop (thread->appdomain_refs);
3441 SPIN_UNLOCK (thread->lock_thread_id);
3446 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3449 SPIN_LOCK (thread->lock_thread_id);
3450 res = ref_stack_find (thread->appdomain_refs, domain);
3451 SPIN_UNLOCK (thread->lock_thread_id);
3456 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3458 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3461 typedef struct abort_appdomain_data {
3462 struct wait_data wait;
3464 } abort_appdomain_data;
3467 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3469 MonoInternalThread *thread = (MonoInternalThread*)value;
3470 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3471 MonoDomain *domain = data->domain;
3473 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3474 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3476 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3477 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3480 data->wait.handles [data->wait.num] = handle;
3481 data->wait.threads [data->wait.num] = thread;
3484 /* Just ignore the rest, we can't do anything with
3492 * mono_threads_abort_appdomain_threads:
3494 * Abort threads which has references to the given appdomain.
3497 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3499 #ifdef __native_client__
3503 abort_appdomain_data user_data;
3505 int orig_timeout = timeout;
3508 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3510 start_time = mono_msec_ticks ();
3512 mono_threads_lock ();
3514 user_data.domain = domain;
3515 user_data.wait.num = 0;
3516 /* This shouldn't take any locks */
3517 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3518 mono_threads_unlock ();
3520 if (user_data.wait.num > 0) {
3521 /* Abort the threads outside the threads lock */
3522 for (i = 0; i < user_data.wait.num; ++i)
3523 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3526 * We should wait for the threads either to abort, or to leave the
3527 * domain. We can't do the latter, so we wait with a timeout.
3529 wait_for_tids (&user_data.wait, 100);
3532 /* Update remaining time */
3533 timeout -= mono_msec_ticks () - start_time;
3534 start_time = mono_msec_ticks ();
3536 if (orig_timeout != -1 && timeout < 0)
3539 while (user_data.wait.num > 0);
3541 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3547 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3549 MonoInternalThread *thread = (MonoInternalThread*)value;
3550 MonoDomain *domain = (MonoDomain*)user_data;
3553 /* No locking needed here */
3554 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3556 if (thread->cached_culture_info) {
3557 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3558 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3559 if (obj && obj->vtable->domain == domain)
3560 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3566 * mono_threads_clear_cached_culture:
3568 * Clear the cached_current_culture from all threads if it is in the
3572 mono_threads_clear_cached_culture (MonoDomain *domain)
3574 mono_threads_lock ();
3575 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3576 mono_threads_unlock ();
3580 * mono_thread_get_undeniable_exception:
3582 * Return an exception which needs to be raised when leaving a catch clause.
3583 * This is used for undeniable exception propagation.
3586 mono_thread_get_undeniable_exception (void)
3588 MonoInternalThread *thread = mono_thread_internal_current ();
3590 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3592 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3593 * exception if the thread no longer references a dying appdomain.
3595 thread->abort_exc->trace_ips = NULL;
3596 thread->abort_exc->stack_trace = NULL;
3597 return thread->abort_exc;
3603 #if MONO_SMALL_CONFIG
3604 #define NUM_STATIC_DATA_IDX 4
3605 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3609 #define NUM_STATIC_DATA_IDX 8
3610 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3611 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3615 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3618 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3621 gpointer *static_data = addr;
3622 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3625 if (!static_data [i])
3627 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3628 ptr = static_data [i];
3629 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3630 uintptr_t bmap = static_reference_bitmaps [i][j];
3633 if ((bmap & 1) && *p) {
3644 * mono_alloc_static_data
3646 * Allocate memory blocks for storing threads or context static data
3649 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3651 guint idx = (offset >> 24) - 1;
3654 gpointer* static_data = *static_data_ptr;
3656 static void* tls_desc = NULL;
3657 if (mono_gc_user_markers_supported () && !tls_desc)
3658 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3659 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3660 *static_data_ptr = static_data;
3661 static_data [0] = static_data;
3664 for (i = 1; i <= idx; ++i) {
3665 if (static_data [i])
3667 if (mono_gc_user_markers_supported () && threadlocal)
3668 static_data [i] = g_malloc0 (static_data_size [i]);
3670 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3675 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3678 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3679 gpointer p = static_data [i];
3683 * At this point, the static data pointer array is still registered with the
3684 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3685 * data. Freeing the individual arrays without first nulling their slots
3686 * would make it possible for mark_tls_slots() to encounter a pointer to
3687 * such an already freed array. See bug #13813.
3689 static_data [i] = NULL;
3690 mono_memory_write_barrier ();
3691 if (mono_gc_user_markers_supported () && threadlocal)
3694 mono_gc_free_fixed (p);
3696 mono_gc_free_fixed (static_data);
3700 * mono_init_static_data_info
3702 * Initializes static data counters
3704 static void mono_init_static_data_info (StaticDataInfo *static_data)
3706 static_data->idx = 0;
3707 static_data->offset = 0;
3708 static_data->freelist = NULL;
3712 * mono_alloc_static_data_slot
3714 * Generates an offset for static data. static_data contains the counters
3715 * used to generate it.
3718 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3722 if (!static_data->idx && !static_data->offset) {
3724 * we use the first chunk of the first allocation also as
3725 * an array for the rest of the data
3727 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3729 static_data->offset += align - 1;
3730 static_data->offset &= ~(align - 1);
3731 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3732 static_data->idx ++;
3733 g_assert (size <= static_data_size [static_data->idx]);
3734 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3735 static_data->offset = 0;
3737 offset = static_data->offset | ((static_data->idx + 1) << 24);
3738 static_data->offset += size;
3743 * ensure thread static fields already allocated are valid for thread
3744 * This function is called when a thread is created or on thread attach.
3747 thread_adjust_static_data (MonoInternalThread *thread)
3751 mono_threads_lock ();
3752 if (thread_static_info.offset || thread_static_info.idx > 0) {
3753 /* get the current allocated size */
3754 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3755 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3757 mono_threads_unlock ();
3761 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3763 MonoInternalThread *thread = value;
3764 guint32 offset = GPOINTER_TO_UINT (user);
3766 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3769 static MonoThreadDomainTls*
3770 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3772 MonoThreadDomainTls* prev = NULL;
3773 MonoThreadDomainTls* tmp = static_data->freelist;
3775 if (tmp->size == size) {
3777 prev->next = tmp->next;
3779 static_data->freelist = tmp->next;
3788 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3791 int idx = (offset >> 24) - 1;
3793 if (!static_reference_bitmaps [idx])
3794 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3795 rb = static_reference_bitmaps [idx];
3797 offset /= sizeof (gpointer);
3798 /* offset is now the bitmap offset */
3799 for (i = 0; i < numbits; ++i) {
3800 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3801 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3806 clear_reference_bitmap (guint32 offset, guint32 size)
3808 int idx = (offset >> 24) - 1;
3810 rb = static_reference_bitmaps [idx];
3812 offset /= sizeof (gpointer);
3813 size /= sizeof (gpointer);
3815 /* offset is now the bitmap offset */
3816 for (; offset < size; ++offset)
3817 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3821 * The offset for a special static variable is composed of three parts:
3822 * a bit that indicates the type of static data (0:thread, 1:context),
3823 * an index in the array of chunks of memory for the thread (thread->static_data)
3824 * and an offset in that chunk of mem. This allows allocating less memory in the
3829 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3832 if (static_type == SPECIAL_STATIC_THREAD) {
3833 MonoThreadDomainTls *item;
3834 mono_threads_lock ();
3835 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3836 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3838 offset = item->offset;
3841 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3843 update_tls_reference_bitmap (offset, bitmap, numbits);
3844 /* This can be called during startup */
3845 if (threads != NULL)
3846 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3847 mono_threads_unlock ();
3849 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3850 mono_contexts_lock ();
3851 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3852 mono_contexts_unlock ();
3853 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3859 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3861 /* The high bit means either thread (0) or static (1) data. */
3863 guint32 static_type = (offset & 0x80000000);
3866 offset &= 0x7fffffff;
3867 idx = (offset >> 24) - 1;
3869 if (static_type == 0) {
3870 return get_thread_static_data (thread, offset);
3872 /* Allocate static data block under demand, since we don't have a list
3875 MonoAppContext *context = mono_context_get ();
3876 if (!context->static_data || !context->static_data [idx]) {
3877 mono_contexts_lock ();
3878 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3879 mono_contexts_unlock ();
3881 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3886 mono_get_special_static_data (guint32 offset)
3888 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3897 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3899 MonoInternalThread *thread = value;
3900 TlsOffsetSize *data = user;
3901 int idx = (data->offset >> 24) - 1;
3904 if (!thread->static_data || !thread->static_data [idx])
3906 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3907 mono_gc_bzero (ptr, data->size);
3911 do_free_special_slot (guint32 offset, guint32 size)
3913 guint32 static_type = (offset & 0x80000000);
3914 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3915 if (static_type == 0) {
3917 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3918 data.offset = offset & 0x7fffffff;
3920 clear_reference_bitmap (data.offset, data.size);
3921 if (threads != NULL)
3922 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3923 item->offset = offset;
3926 if (!mono_runtime_is_shutting_down ()) {
3927 item->next = thread_static_info.freelist;
3928 thread_static_info.freelist = item;
3930 /* We could be called during shutdown after mono_thread_cleanup () is called */
3934 /* FIXME: free context static data as well */
3939 do_free_special (gpointer key, gpointer value, gpointer data)
3941 MonoClassField *field = key;
3942 guint32 offset = GPOINTER_TO_UINT (value);
3945 size = mono_type_size (field->type, &align);
3946 do_free_special_slot (offset, size);
3950 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3952 mono_threads_lock ();
3953 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3954 mono_threads_unlock ();
3958 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3960 mono_threads_lock ();
3961 do_free_special_slot (offset, size);
3962 mono_threads_unlock ();
3966 * allocates room in the thread local area for storing an instance of the struct type
3967 * the allocation is kept track of in domain->tlsrec_list.
3970 mono_thread_alloc_tls (MonoReflectionType *type)
3972 MonoDomain *domain = mono_domain_get ();
3974 MonoTlsDataRecord *tlsrec;
3977 gsize default_bitmap [4] = {0};
3978 uint32_t tls_offset;
3982 klass = mono_class_from_mono_type (type->type);
3983 /* TlsDatum is a struct, so we subtract the object header size offset */
3984 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3985 size = mono_type_size (type->type, &align);
3986 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3987 if (bitmap != default_bitmap)
3989 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3990 tlsrec->tls_offset = tls_offset;
3991 tlsrec->size = size;
3992 mono_domain_lock (domain);
3993 tlsrec->next = domain->tlsrec_list;
3994 domain->tlsrec_list = tlsrec;
3995 mono_domain_unlock (domain);
4000 mono_thread_destroy_tls (uint32_t tls_offset)
4002 MonoTlsDataRecord *prev = NULL;
4003 MonoTlsDataRecord *cur;
4005 MonoDomain *domain = mono_domain_get ();
4006 mono_domain_lock (domain);
4007 cur = domain->tlsrec_list;
4009 if (cur->tls_offset == tls_offset) {
4011 prev->next = cur->next;
4013 domain->tlsrec_list = cur->next;
4021 mono_domain_unlock (domain);
4023 mono_special_static_data_free_slot (tls_offset, size);
4027 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4030 mono_thread_destroy_domain_tls (MonoDomain *domain)
4032 while (domain->tlsrec_list)
4033 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4036 static MonoClassField *local_slots = NULL;
4039 /* local tls data to get locals_slot from a thread */
4042 /* index in the locals_slot array */
4047 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4049 LocalSlotID *sid = user_data;
4050 MonoInternalThread *thread = (MonoInternalThread*)value;
4051 MonoArray *slots_array;
4053 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4054 * it is for the right domain, so we need to check if it is allocated an initialized
4055 * for the current thread.
4057 /*g_print ("handling thread %p\n", thread);*/
4058 if (!thread->static_data || !thread->static_data [sid->idx])
4060 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4061 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4063 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4067 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4075 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4077 g_warning ("local_slots field not found in Thread class");
4081 domain = mono_domain_get ();
4082 mono_domain_lock (domain);
4083 if (domain->special_static_fields)
4084 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4085 mono_domain_unlock (domain);
4088 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4089 sid.offset = GPOINTER_TO_UINT (addr);
4090 sid.offset &= 0x7fffffff;
4091 sid.idx = (sid.offset >> 24) - 1;
4092 mono_threads_lock ();
4093 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4094 mono_threads_unlock ();
4096 /* FIXME: clear the slot for MonoAppContexts, too */
4101 static void CALLBACK dummy_apc (ULONG_PTR param)
4105 static guint32 dummy_apc (gpointer param)
4112 * mono_thread_execute_interruption
4114 * Performs the operation that the requested thread state requires (abort,
4117 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4119 ensure_synch_cs_set (thread);
4121 EnterCriticalSection (thread->synch_cs);
4123 /* MonoThread::interruption_requested can only be changed with atomics */
4124 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4125 /* this will consume pending APC calls */
4126 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4127 InterlockedDecrement (&thread_interruption_requested);
4129 /* Clear the interrupted flag of the thread so it can wait again */
4130 wapi_clear_interruption ();
4134 if ((thread->state & ThreadState_AbortRequested) != 0) {
4135 LeaveCriticalSection (thread->synch_cs);
4136 if (thread->abort_exc == NULL) {
4138 * This might be racy, but it has to be called outside the lock
4139 * since it calls managed code.
4141 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4143 return thread->abort_exc;
4145 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4146 self_suspend_internal (thread);
4149 else if ((thread->state & ThreadState_StopRequested) != 0) {
4150 /* FIXME: do this through the JIT? */
4152 LeaveCriticalSection (thread->synch_cs);
4154 mono_thread_exit ();
4156 } else if (thread->pending_exception) {
4159 exc = thread->pending_exception;
4160 thread->pending_exception = NULL;
4162 LeaveCriticalSection (thread->synch_cs);
4164 } else if (thread->thread_interrupt_requested) {
4166 thread->thread_interrupt_requested = FALSE;
4167 LeaveCriticalSection (thread->synch_cs);
4169 return(mono_get_exception_thread_interrupted ());
4172 LeaveCriticalSection (thread->synch_cs);
4178 * mono_thread_request_interruption
4180 * A signal handler can call this method to request the interruption of a
4181 * thread. The result of the interruption will depend on the current state of
4182 * the thread. If the result is an exception that needs to be throw, it is
4183 * provided as return value.
4186 mono_thread_request_interruption (gboolean running_managed)
4188 MonoInternalThread *thread = mono_thread_internal_current ();
4190 /* The thread may already be stopping */
4195 if (thread->interrupt_on_stop &&
4196 thread->state & ThreadState_StopRequested &&
4197 thread->state & ThreadState_Background)
4201 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4203 InterlockedIncrement (&thread_interruption_requested);
4205 if (!running_managed || is_running_protected_wrapper ()) {
4206 /* Can't stop while in unmanaged code. Increase the global interruption
4207 request count. When exiting the unmanaged method the count will be
4208 checked and the thread will be interrupted. */
4211 if (mono_thread_notify_pending_exc_fn && !running_managed)
4212 /* The JIT will notify the thread about the interruption */
4213 /* This shouldn't take any locks */
4214 mono_thread_notify_pending_exc_fn ();
4216 /* this will awake the thread if it is in WaitForSingleObject
4218 /* Our implementation of this function ignores the func argument */
4219 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4223 return mono_thread_execute_interruption (thread);
4227 /*This function should be called by a thread after it has exited all of
4228 * its handle blocks at interruption time.*/
4230 mono_thread_resume_interruption (void)
4232 MonoInternalThread *thread = mono_thread_internal_current ();
4233 gboolean still_aborting;
4235 /* The thread may already be stopping */
4239 ensure_synch_cs_set (thread);
4240 EnterCriticalSection (thread->synch_cs);
4241 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4242 LeaveCriticalSection (thread->synch_cs);
4244 /*This can happen if the protected block called Thread::ResetAbort*/
4245 if (!still_aborting)
4248 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4250 InterlockedIncrement (&thread_interruption_requested);
4253 wapi_self_interrupt ();
4255 return mono_thread_execute_interruption (thread);
4258 gboolean mono_thread_interruption_requested ()
4260 if (thread_interruption_requested) {
4261 MonoInternalThread *thread = mono_thread_internal_current ();
4262 /* The thread may already be stopping */
4264 return (thread->interruption_requested);
4269 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4271 MonoInternalThread *thread = mono_thread_internal_current ();
4273 /* The thread may already be stopping */
4277 mono_debugger_check_interruption ();
4279 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4280 MonoException* exc = mono_thread_execute_interruption (thread);
4281 if (exc) mono_raise_exception (exc);
4286 * Performs the interruption of the current thread, if one has been requested,
4287 * and the thread is not running a protected wrapper.
4289 void mono_thread_interruption_checkpoint ()
4291 mono_thread_interruption_checkpoint_request (FALSE);
4295 * Performs the interruption of the current thread, if one has been requested.
4297 void mono_thread_force_interruption_checkpoint ()
4299 mono_thread_interruption_checkpoint_request (TRUE);
4303 * mono_thread_get_and_clear_pending_exception:
4305 * Return any pending exceptions for the current thread and clear it as a side effect.
4308 mono_thread_get_and_clear_pending_exception (void)
4310 MonoInternalThread *thread = mono_thread_internal_current ();
4312 /* The thread may already be stopping */
4316 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4317 return mono_thread_execute_interruption (thread);
4320 if (thread->pending_exception) {
4321 MonoException *exc = thread->pending_exception;
4323 thread->pending_exception = NULL;
4331 * mono_set_pending_exception:
4333 * Set the pending exception of the current thread to EXC.
4334 * The exception will be thrown when execution returns to managed code.
4337 mono_set_pending_exception (MonoException *exc)
4339 MonoInternalThread *thread = mono_thread_internal_current ();
4341 /* The thread may already be stopping */
4345 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4347 mono_thread_request_interruption (FALSE);
4351 * mono_thread_interruption_request_flag:
4353 * Returns the address of a flag that will be non-zero if an interruption has
4354 * been requested for a thread. The thread to interrupt may not be the current
4355 * thread, so an additional call to mono_thread_interruption_requested() or
4356 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4359 gint32* mono_thread_interruption_request_flag ()
4361 return &thread_interruption_requested;
4365 mono_thread_init_apartment_state (void)
4368 MonoInternalThread* thread = mono_thread_internal_current ();
4370 /* Positive return value indicates success, either
4371 * S_OK if this is first CoInitialize call, or
4372 * S_FALSE if CoInitialize already called, but with same
4373 * threading model. A negative value indicates failure,
4374 * probably due to trying to change the threading model.
4376 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4377 ? COINIT_APARTMENTTHREADED
4378 : COINIT_MULTITHREADED) < 0) {
4379 thread->apartment_state = ThreadApartmentState_Unknown;
4385 mono_thread_cleanup_apartment_state (void)
4388 MonoInternalThread* thread = mono_thread_internal_current ();
4390 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4397 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4399 ensure_synch_cs_set (thread);
4401 EnterCriticalSection (thread->synch_cs);
4402 thread->state |= state;
4403 LeaveCriticalSection (thread->synch_cs);
4407 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4409 ensure_synch_cs_set (thread);
4411 EnterCriticalSection (thread->synch_cs);
4412 thread->state &= ~state;
4413 LeaveCriticalSection (thread->synch_cs);
4417 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4419 gboolean ret = FALSE;
4421 ensure_synch_cs_set (thread);
4423 EnterCriticalSection (thread->synch_cs);
4425 if ((thread->state & test) != 0) {
4429 LeaveCriticalSection (thread->synch_cs);
4434 //static MonoClassField *execution_context_field;
4437 get_execution_context_addr (void)
4439 MonoDomain *domain = mono_domain_get ();
4440 guint32 offset = domain->execution_context_field_offset;
4443 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4446 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4448 mono_domain_lock (domain);
4449 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4450 mono_domain_unlock (domain);
4453 domain->execution_context_field_offset = offset;
4456 return (MonoObject**) mono_get_special_static_data (offset);
4460 mono_thread_get_execution_context (void)
4462 return *get_execution_context_addr ();
4466 mono_thread_set_execution_context (MonoObject *ec)
4468 *get_execution_context_addr () = ec;
4471 static gboolean has_tls_get = FALSE;
4474 mono_runtime_set_has_tls_get (gboolean val)
4480 mono_runtime_has_tls_get (void)
4486 mono_thread_kill (MonoInternalThread *thread, int signal)
4488 #ifdef __native_client__
4489 /* Workaround pthread_kill abort() in NaCl glibc. */
4493 /* Win32 uses QueueUserAPC and callers of this are guarded */
4494 g_assert_not_reached ();
4496 # ifdef PTHREAD_POINTER_ID
4497 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4499 # ifdef PLATFORM_ANDROID
4500 if (thread->android_tid != 0) {
4502 int old_errno = errno;
4504 ret = tkill ((pid_t) thread->android_tid, signal);
4513 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4515 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4522 self_interrupt_thread (void *_unused)
4524 MonoThreadInfo *info = mono_thread_info_current ();
4525 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4526 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4527 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4528 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4532 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4536 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4540 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4542 MonoJitInfo **dest = data;
4548 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4550 MonoJitInfo *ji = NULL;
4553 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4558 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4561 MonoThreadInfo *info = NULL;
4562 gboolean protected_wrapper;
4563 gboolean running_managed;
4565 if (!mono_thread_info_new_interrupt_enabled ()) {
4566 signal_thread_state_change (thread);
4571 FIXME this is insanely broken, it doesn't cause interruption to happen
4572 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4574 if (thread == mono_thread_internal_current ()) {
4575 /* Do it synchronously */
4576 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4578 mono_raise_exception (exc);
4580 wapi_interrupt_thread (thread->handle);
4585 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4586 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4590 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4591 mono_thread_info_resume (mono_thread_info_get_tid (info));
4595 /*someone is already interrupting it*/
4596 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4597 mono_thread_info_resume (mono_thread_info_get_tid (info));
4600 InterlockedIncrement (&thread_interruption_requested);
4602 ji = mono_thread_info_get_last_managed (info);
4603 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4604 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4606 if (!protected_wrapper && running_managed) {
4607 /*We are in managed code*/
4608 /*Set the thread to call */
4609 if (install_async_abort)
4610 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4611 mono_thread_info_resume (mono_thread_info_get_tid (info));
4613 gpointer interrupt_handle;
4615 * This will cause waits to be broken.
4616 * It will also prevent the thread from entering a wait, so if the thread returns
4617 * from the wait before it receives the abort signal, it will just spin in the wait
4618 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4622 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4624 mono_thread_info_resume (mono_thread_info_get_tid (info));
4626 wapi_finish_interrupt_thread (interrupt_handle);
4629 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4633 transition_to_suspended (MonoInternalThread *thread)
4635 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4636 g_assert (0); /*FIXME we should not reach this */
4637 /*Make sure we balance the suspend count.*/
4638 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4640 thread->state &= ~ThreadState_SuspendRequested;
4641 thread->state |= ThreadState_Suspended;
4642 mono_thread_info_finish_suspend ();
4644 LeaveCriticalSection (thread->synch_cs);
4648 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4650 if (!mono_thread_info_new_interrupt_enabled ()) {
4651 signal_thread_state_change (thread);
4655 EnterCriticalSection (thread->synch_cs);
4656 if (thread == mono_thread_internal_current ()) {
4657 transition_to_suspended (thread);
4658 mono_thread_info_self_suspend ();
4660 MonoThreadInfo *info;
4662 gboolean protected_wrapper;
4663 gboolean running_managed;
4665 /*A null info usually means the thread is already dead. */
4666 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4667 LeaveCriticalSection (thread->synch_cs);
4671 ji = mono_thread_info_get_last_managed (info);
4672 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4673 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4675 if (running_managed && !protected_wrapper) {
4676 transition_to_suspended (thread);
4678 gpointer interrupt_handle;
4680 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4681 InterlockedIncrement (&thread_interruption_requested);
4684 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4686 mono_thread_info_resume (mono_thread_info_get_tid (info));
4689 wapi_finish_interrupt_thread (interrupt_handle);
4691 LeaveCriticalSection (thread->synch_cs);
4696 /*This is called with @thread synch_cs held and it must release it*/
4698 self_suspend_internal (MonoInternalThread *thread)
4700 if (!mono_thread_info_new_interrupt_enabled ()) {
4701 thread->state &= ~ThreadState_SuspendRequested;
4702 thread->state |= ThreadState_Suspended;
4703 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4704 if (thread->suspend_event == NULL) {
4705 LeaveCriticalSection (thread->synch_cs);
4708 if (thread->suspended_event)
4709 SetEvent (thread->suspended_event);
4711 LeaveCriticalSection (thread->synch_cs);
4713 if (shutting_down) {
4714 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4719 WaitForSingleObject (thread->suspend_event, INFINITE);
4721 EnterCriticalSection (thread->synch_cs);
4723 CloseHandle (thread->suspend_event);
4724 thread->suspend_event = NULL;
4725 thread->state &= ~ThreadState_Suspended;
4727 /* The thread that requested the resume will have replaced this event
4728 * and will be waiting for it
4730 SetEvent (thread->resume_event);
4732 LeaveCriticalSection (thread->synch_cs);
4736 transition_to_suspended (thread);
4737 mono_thread_info_self_suspend ();
4740 /*This is called with @thread synch_cs held and it must release it*/
4742 resume_thread_internal (MonoInternalThread *thread)
4744 if (!mono_thread_info_new_interrupt_enabled ()) {
4745 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4746 if (thread->resume_event == NULL) {
4747 LeaveCriticalSection (thread->synch_cs);
4751 /* Awake the thread */
4752 SetEvent (thread->suspend_event);
4754 LeaveCriticalSection (thread->synch_cs);
4756 /* Wait for the thread to awake */
4757 WaitForSingleObject (thread->resume_event, INFINITE);
4758 CloseHandle (thread->resume_event);
4759 thread->resume_event = NULL;
4763 LeaveCriticalSection (thread->synch_cs);
4764 /* Awake the thread */
4765 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4767 EnterCriticalSection (thread->synch_cs);
4768 thread->state &= ~ThreadState_Suspended;
4769 LeaveCriticalSection (thread->synch_cs);
4775 * mono_thread_is_foreign:
4776 * @thread: the thread to query
4778 * This function allows one to determine if a thread was created by the mono runtime and has
4779 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4781 * Returns: true if @thread was not created by the runtime.
4784 mono_thread_is_foreign (MonoThread *thread)
4786 MonoThreadInfo *info = thread->internal_thread->thread_info;
4787 return info->runtime_thread == FALSE;