2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
20 #if defined(__OpenBSD__) || defined(__FreeBSD__)
22 #include <pthread_np.h>
25 #include <mono/metadata/object.h>
26 #include <mono/metadata/domain-internals.h>
27 #include <mono/metadata/profiler-private.h>
28 #include <mono/metadata/threads.h>
29 #include <mono/metadata/threadpool.h>
30 #include <mono/metadata/threads-types.h>
31 #include <mono/metadata/exception.h>
32 #include <mono/metadata/environment.h>
33 #include <mono/metadata/monitor.h>
34 #include <mono/metadata/gc-internal.h>
35 #include <mono/metadata/marshal.h>
36 #include <mono/metadata/runtime.h>
37 #include <mono/io-layer/io-layer.h>
39 #include <mono/io-layer/threads.h>
41 #include <mono/metadata/object-internals.h>
42 #include <mono/metadata/mono-debug-debugger.h>
43 #include <mono/utils/mono-compiler.h>
44 #include <mono/utils/mono-mmap.h>
45 #include <mono/utils/mono-membar.h>
46 #include <mono/utils/mono-time.h>
47 #include <mono/utils/mono-threads.h>
48 #include <mono/utils/hazard-pointer.h>
49 #include <mono/utils/mono-tls.h>
50 #include <mono/utils/atomic.h>
52 #include <mono/metadata/gc-internal.h>
54 #ifdef PLATFORM_ANDROID
57 extern int tkill (pid_t tid, int signal);
60 #if defined(PLATFORM_MACOSX) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
61 void *pthread_get_stackaddr_np(pthread_t);
62 size_t pthread_get_stacksize_np(pthread_t);
65 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
66 #define THREAD_DEBUG(a)
67 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
68 #define THREAD_WAIT_DEBUG(a)
69 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
70 #define LIBGC_DEBUG(a)
72 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
73 #define SPIN_LOCK(i) do { \
74 if (SPIN_TRYLOCK (i)) \
78 #define SPIN_UNLOCK(i) i = 0
80 /* Provide this for systems with glib < 2.6 */
81 #ifndef G_GSIZE_FORMAT
82 # if GLIB_SIZEOF_LONG == 8
83 # define G_GSIZE_FORMAT "lu"
85 # define G_GSIZE_FORMAT "u"
91 guint32 (*func)(void *);
107 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
108 struct _MonoThreadDomainTls {
109 MonoThreadDomainTls *next;
117 MonoThreadDomainTls *freelist;
120 /* Number of cached culture objects in the MonoThread->cached_culture_info array
121 * (per-type): we use the first NUM entries for CultureInfo and the last for
122 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
124 #define NUM_CACHED_CULTURES 4
125 #define CULTURES_START_IDX 0
126 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
128 /* Controls access to the 'threads' hash table */
129 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
130 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
131 static CRITICAL_SECTION threads_mutex;
133 /* Controls access to context static data */
134 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
135 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
136 static CRITICAL_SECTION contexts_mutex;
138 /* Holds current status of static data heap */
139 static StaticDataInfo thread_static_info;
140 static StaticDataInfo context_static_info;
142 /* The hash of existing threads (key is thread ID, value is
143 * MonoInternalThread*) that need joining before exit
145 static MonoGHashTable *threads=NULL;
148 * Threads which are starting up and they are not in the 'threads' hash yet.
149 * When handle_store is called for a thread, it will be removed from this hash table.
150 * Protected by mono_threads_lock ().
152 static MonoGHashTable *threads_starting_up = NULL;
154 /* Maps a MonoThread to its start argument */
155 /* Protected by mono_threads_lock () */
156 static MonoGHashTable *thread_start_args = NULL;
158 /* The TLS key that holds the MonoObject assigned to each thread */
159 static MonoNativeTlsKey current_object_key;
161 #ifdef MONO_HAVE_FAST_TLS
162 /* we need to use both the Tls* functions and __thread because
163 * the gc needs to see all the threads
165 MONO_FAST_TLS_DECLARE(tls_current_object);
166 #define SET_CURRENT_OBJECT(x) do { \
167 MONO_FAST_TLS_SET (tls_current_object, x); \
168 mono_native_tls_set_value (current_object_key, x); \
170 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
172 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
173 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
176 /* function called at thread start */
177 static MonoThreadStartCB mono_thread_start_cb = NULL;
179 /* function called at thread attach */
180 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
182 /* function called at thread cleanup */
183 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
185 /* function called to notify the runtime about a pending exception on the current thread */
186 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
188 /* The default stack size for each thread */
189 static guint32 default_stacksize = 0;
190 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
192 static void thread_adjust_static_data (MonoInternalThread *thread);
193 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
194 static void mono_init_static_data_info (StaticDataInfo *static_data);
195 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
196 static gboolean mono_thread_resume (MonoInternalThread* thread);
197 static void mono_thread_start (MonoThread *thread);
198 static void signal_thread_state_change (MonoInternalThread *thread);
199 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
200 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
201 static void self_suspend_internal (MonoInternalThread *thread);
202 static gboolean resume_thread_internal (MonoInternalThread *thread);
204 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
205 static void ref_stack_destroy (gpointer rs);
207 /* Spin lock for InterlockedXXX 64 bit functions */
208 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
209 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
210 static CRITICAL_SECTION interlocked_mutex;
212 /* global count of thread interruptions requested */
213 static gint32 thread_interruption_requested = 0;
215 /* Event signaled when a thread changes its background mode */
216 static HANDLE background_change_event;
218 static gboolean shutting_down = FALSE;
220 static gint32 managed_thread_id_counter = 0;
223 get_next_managed_thread_id (void)
225 return InterlockedIncrement (&managed_thread_id_counter);
229 mono_thread_get_tls_key (void)
231 return current_object_key;
235 mono_thread_get_tls_offset (void)
238 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
242 /* handle_store() and handle_remove() manage the array of threads that
243 * still need to be waited for when the main thread exits.
245 * If handle_store() returns FALSE the thread must not be started
246 * because Mono is shutting down.
248 static gboolean handle_store(MonoThread *thread)
250 mono_threads_lock ();
252 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
254 if (threads_starting_up)
255 mono_g_hash_table_remove (threads_starting_up, thread);
258 mono_threads_unlock ();
263 MONO_GC_REGISTER_ROOT_FIXED (threads);
264 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
267 /* We don't need to duplicate thread->handle, because it is
268 * only closed when the thread object is finalized by the GC.
270 g_assert (thread->internal_thread);
271 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
272 thread->internal_thread);
274 mono_threads_unlock ();
279 static gboolean handle_remove(MonoInternalThread *thread)
282 gsize tid = thread->tid;
284 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
286 mono_threads_lock ();
289 /* We have to check whether the thread object for the
290 * tid is still the same in the table because the
291 * thread might have been destroyed and the tid reused
292 * in the meantime, in which case the tid would be in
293 * the table, but with another thread object.
295 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
296 mono_g_hash_table_remove (threads, (gpointer)tid);
305 mono_threads_unlock ();
307 /* Don't close the handle here, wait for the object finalizer
308 * to do it. Otherwise, the following race condition applies:
310 * 1) Thread exits (and handle_remove() closes the handle)
312 * 2) Some other handle is reassigned the same slot
314 * 3) Another thread tries to join the first thread, and
315 * blocks waiting for the reassigned handle to be signalled
316 * (which might never happen). This is possible, because the
317 * thread calling Join() still has a reference to the first
323 static void ensure_synch_cs_set (MonoInternalThread *thread)
325 CRITICAL_SECTION *synch_cs;
327 if (thread->synch_cs != NULL) {
331 synch_cs = g_new0 (CRITICAL_SECTION, 1);
332 InitializeCriticalSection (synch_cs);
334 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
335 synch_cs, NULL) != NULL) {
336 /* Another thread must have installed this CS */
337 DeleteCriticalSection (synch_cs);
343 * NOTE: this function can be called also for threads different from the current one:
344 * make sure no code called from it will ever assume it is run on the thread that is
345 * getting cleaned up.
347 static void thread_cleanup (MonoInternalThread *thread)
349 g_assert (thread != NULL);
351 if (thread->abort_state_handle) {
352 mono_gchandle_free (thread->abort_state_handle);
353 thread->abort_state_handle = 0;
355 thread->abort_exc = NULL;
356 thread->current_appcontext = NULL;
359 * This is necessary because otherwise we might have
360 * cross-domain references which will not get cleaned up when
361 * the target domain is unloaded.
363 if (thread->cached_culture_info) {
365 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
366 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
369 ensure_synch_cs_set (thread);
371 EnterCriticalSection (thread->synch_cs);
373 thread->state |= ThreadState_Stopped;
374 thread->state &= ~ThreadState_Background;
376 LeaveCriticalSection (thread->synch_cs);
379 An interruption request has leaked to cleanup. Adjust the global counter.
381 This can happen is the abort source thread finds the abortee (this) thread
382 in unmanaged code. If this thread never trips back to managed code or check
383 the local flag it will be left set and positively unbalance the global counter.
385 Leaving the counter unbalanced will cause a performance degradation since all threads
386 will now keep checking their local flags all the time.
388 if (InterlockedExchange (&thread->interruption_requested, 0))
389 InterlockedDecrement (&thread_interruption_requested);
391 /* if the thread is not in the hash it has been removed already */
392 if (!handle_remove (thread)) {
393 if (thread == mono_thread_internal_current ()) {
394 mono_domain_unset ();
395 mono_memory_barrier ();
397 /* This needs to be called even if handle_remove () fails */
398 if (mono_thread_cleanup_fn)
399 mono_thread_cleanup_fn (thread);
402 mono_release_type_locks (thread);
404 mono_profiler_thread_end (thread->tid);
406 if (thread == mono_thread_internal_current ()) {
408 * This will signal async signal handlers that the thread has exited.
409 * The profiler callback needs this to be set, so it cannot be done earlier.
411 mono_domain_unset ();
412 mono_memory_barrier ();
415 if (thread == mono_thread_internal_current ())
416 mono_thread_pop_appdomain_ref ();
418 thread->cached_culture_info = NULL;
420 mono_free_static_data (thread->static_data, TRUE);
421 thread->static_data = NULL;
422 ref_stack_destroy (thread->appdomain_refs);
423 thread->appdomain_refs = NULL;
425 if (mono_thread_cleanup_fn)
426 mono_thread_cleanup_fn (thread);
428 if (mono_gc_is_moving ()) {
429 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
430 thread->thread_pinning_ref = NULL;
436 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
439 g_assert ((offset & 0x80000000) == 0);
440 offset &= 0x7fffffff;
441 idx = (offset >> 24) - 1;
442 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
446 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
448 static MonoClassField *current_thread_field = NULL;
452 if (!current_thread_field) {
453 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
454 g_assert (current_thread_field);
457 mono_class_vtable (domain, mono_defaults.thread_class);
458 mono_domain_lock (domain);
459 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
460 mono_domain_unlock (domain);
463 return get_thread_static_data (thread, offset);
467 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
469 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
471 g_assert (current->obj.vtable->domain == domain);
473 g_assert (!*current_thread_ptr);
474 *current_thread_ptr = current;
477 static MonoInternalThread*
478 create_internal_thread_object (void)
480 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
481 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
485 create_thread_object (MonoDomain *domain)
487 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
488 return (MonoThread*)mono_gc_alloc_mature (vt);
492 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
494 MonoThread *thread = create_thread_object (domain);
495 MONO_OBJECT_SETREF (thread, internal_thread, internal);
500 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
502 MonoDomain *domain = mono_get_root_domain ();
504 if (!candidate || candidate->obj.vtable->domain != domain)
505 candidate = new_thread_with_internal (domain, thread);
506 set_current_thread_for_domain (domain, thread, candidate);
507 g_assert (!thread->root_domain_thread);
508 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
511 static guint32 WINAPI start_wrapper_internal(void *data)
513 MonoThreadInfo *info;
514 struct StartInfo *start_info=(struct StartInfo *)data;
515 guint32 (*start_func)(void *);
519 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
522 MonoInternalThread *internal = start_info->obj->internal_thread;
523 MonoObject *start_delegate = start_info->delegate;
524 MonoDomain *domain = start_info->obj->obj.vtable->domain;
526 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
528 /* We can be sure start_info->obj->tid and
529 * start_info->obj->handle have been set, because the thread
530 * was created suspended, and these values were set before the
534 info = mono_thread_info_current ();
536 internal->thread_info = info;
541 SET_CURRENT_OBJECT (internal);
543 mono_monitor_init_tls ();
545 /* Every thread references the appdomain which created it */
546 mono_thread_push_appdomain_ref (domain);
548 if (!mono_domain_set (domain, FALSE)) {
549 /* No point in raising an appdomain_unloaded exception here */
550 /* FIXME: Cleanup here */
551 mono_thread_pop_appdomain_ref ();
555 start_func = start_info->func;
556 start_arg = start_info->start_arg;
558 /* We have to do this here because mono_thread_new_init()
559 requires that root_domain_thread is set up. */
560 thread_adjust_static_data (internal);
561 init_root_domain_thread (internal, start_info->obj);
563 /* This MUST be called before any managed code can be
564 * executed, as it calls the callback function that (for the
565 * jit) sets the lmf marker.
567 mono_thread_new_init (tid, &tid, start_func);
568 internal->stack_ptr = &tid;
570 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
572 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
574 /* On 2.0 profile (and higher), set explicitly since state might have been
576 if (internal->apartment_state == ThreadApartmentState_Unknown)
577 internal->apartment_state = ThreadApartmentState_MTA;
579 mono_thread_init_apartment_state ();
581 if(internal->start_notify!=NULL) {
582 /* Let the thread that called Start() know we're
585 ReleaseSemaphore (internal->start_notify, 1, NULL);
588 mono_threads_lock ();
589 mono_g_hash_table_remove (thread_start_args, start_info->obj);
590 mono_threads_unlock ();
592 mono_thread_set_execution_context (start_info->obj->ec_to_set);
593 start_info->obj->ec_to_set = NULL;
596 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
600 * Call this after calling start_notify, since the profiler callback might want
601 * to lock the thread, and the lock is held by thread_start () which waits for
604 mono_profiler_thread_start (tid);
606 /* start_func is set only for unmanaged start functions */
608 start_func (start_arg);
611 g_assert (start_delegate != NULL);
612 args [0] = start_arg;
613 /* we may want to handle the exception here. See comment below on unhandled exceptions */
614 mono_runtime_delegate_invoke (start_delegate, args, NULL);
617 /* If the thread calls ExitThread at all, this remaining code
618 * will not be executed, but the main thread will eventually
619 * call thread_cleanup() on this thread's behalf.
622 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
624 /* Do any cleanup needed for apartment state. This
625 * cannot be done in thread_cleanup since thread_cleanup could be
626 * called for a thread other than the current thread.
627 * mono_thread_cleanup_apartment_state cleans up apartment
628 * for the current thead */
629 mono_thread_cleanup_apartment_state ();
631 thread_cleanup (internal);
633 /* Remove the reference to the thread object in the TLS data,
634 * so the thread object can be finalized. This won't be
635 * reached if the thread threw an uncaught exception, so those
636 * thread handles will stay referenced :-( (This is due to
637 * missing support for scanning thread-specific data in the
638 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
641 SET_CURRENT_OBJECT (NULL);
646 static guint32 WINAPI start_wrapper(void *data)
650 /* Avoid scanning the frames above this frame during a GC */
651 mono_gc_set_stack_end ((void*)&dummy);
653 return start_wrapper_internal (data);
656 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
658 if (mono_thread_start_cb) {
659 mono_thread_start_cb (tid, stack_start, func);
663 void mono_threads_set_default_stacksize (guint32 stacksize)
665 default_stacksize = stacksize;
668 guint32 mono_threads_get_default_stacksize (void)
670 return default_stacksize;
674 * mono_create_thread:
676 * This is a wrapper around CreateThread which handles differences in the type of
677 * the the 'tid' argument.
679 gpointer mono_create_thread (WapiSecurityAttributes *security,
680 guint32 stacksize, WapiThreadStart start,
681 gpointer param, guint32 create, gsize *tid)
688 res = mono_threads_CreateThread (security, stacksize, start, param, create, &real_tid);
692 res = CreateThread (security, stacksize, start, param, create, tid);
699 * The thread start argument may be an object reference, and there is
700 * no ref to keep it alive when the new thread is started but not yet
701 * registered with the collector. So we store it in a GC tracked hash
704 * LOCKING: Assumes the threads lock is held.
707 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
709 if (thread_start_args == NULL) {
710 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
711 thread_start_args = mono_g_hash_table_new (NULL, NULL);
713 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
717 * mono_thread_create_internal:
719 * If NO_DETACH is TRUE, then the thread is not detached using pthread_detach (). This is needed to fix the race condition where waiting for a thred to exit only waits for its exit event to be
720 * signalled, which can cause shutdown crashes if the thread shutdown code accesses data already freed by the runtime shutdown.
721 * Currently, this is only used for the finalizer thread.
724 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, gboolean no_detach, guint32 stack_size)
727 MonoInternalThread *internal;
728 HANDLE thread_handle;
729 struct StartInfo *start_info;
731 guint32 create_flags;
733 thread = create_thread_object (domain);
734 internal = create_internal_thread_object ();
735 MONO_OBJECT_SETREF (thread, internal_thread, internal);
737 start_info=g_new0 (struct StartInfo, 1);
738 start_info->func = func;
739 start_info->obj = thread;
740 start_info->start_arg = arg;
742 mono_threads_lock ();
744 mono_threads_unlock ();
748 if (threads_starting_up == NULL) {
749 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
750 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
753 register_thread_start_argument (thread, start_info);
754 mono_g_hash_table_insert (threads_starting_up, thread, thread);
755 mono_threads_unlock ();
758 stack_size = default_stacksize_for_thread (internal);
760 /* Create suspended, so we can do some housekeeping before the thread
763 create_flags = CREATE_SUSPENDED;
766 create_flags |= CREATE_NO_DETACH;
768 thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
770 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
771 if (thread_handle == NULL) {
772 /* The thread couldn't be created, so throw an exception */
773 mono_threads_lock ();
774 mono_g_hash_table_remove (threads_starting_up, thread);
775 mono_threads_unlock ();
777 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
781 internal->handle=thread_handle;
783 internal->apartment_state=ThreadApartmentState_Unknown;
784 internal->managed_id = get_next_managed_thread_id ();
785 if (mono_gc_is_moving ()) {
786 internal->thread_pinning_ref = internal;
787 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
790 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
791 InitializeCriticalSection (internal->synch_cs);
793 internal->threadpool_thread = threadpool_thread;
794 if (threadpool_thread)
795 mono_thread_set_state (internal, ThreadState_Background);
797 if (handle_store (thread))
798 ResumeThread (thread_handle);
800 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
801 if (mono_check_corlib_version () == NULL)
802 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
808 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
810 mono_thread_create_internal (domain, func, arg, FALSE, FALSE, 0);
813 #if defined(HOST_WIN32) && defined(__GNUC__)
814 static __inline__ __attribute__((always_inline))
815 /* This is not defined by gcc */
817 __readfsdword (unsigned long long offset)
819 unsigned long long value;
820 __asm__("movl %%fs:%a[offset], %k[value]" : [value] "=q" (value) : [offset] "irm" (offset));
826 * mono_thread_get_stack_bounds:
828 * Return the address and size of the current threads stack. Return NULL as the
829 * stack address if the stack address cannot be determined.
832 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
836 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
837 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
838 *stsize = pthread_get_stacksize_np (pthread_self ());
840 /* staddr points to the start of the stack, not the end */
842 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
844 /* FIXME: simplify the mess below */
845 #elif defined(HOST_WIN32)
846 /* http://en.wikipedia.org/wiki/Win32_Thread_Information_Block */
847 void* tib = (void*)__readfsdword(0x18);
848 guint8 *stackTop = (guint8*)*(int*)((char*)tib + 4);
849 guint8 *stackBottom = (guint8*)*(int*)((char*)tib + 8);
851 *staddr = stackBottom;
852 *stsize = stackTop - stackBottom;
856 guint8 *current = (guint8*)&attr;
859 *stsize = (size_t)-1;
861 pthread_attr_init (&attr);
862 # ifdef HAVE_PTHREAD_GETATTR_NP
863 pthread_getattr_np (pthread_self(), &attr);
865 # ifdef HAVE_PTHREAD_ATTR_GET_NP
866 pthread_attr_get_np (pthread_self(), &attr);
869 pthread_attr_getstacksize (&attr, &stsize);
870 # elif defined(__OpenBSD__)
874 rslt = pthread_stackseg_np(pthread_self(), &ss);
875 g_assert (rslt == 0);
877 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
878 *stsize = ss.ss_size;
887 # if defined(__native_client__)
889 pthread_attr_getstacksize (&attr, &stsize);
890 # elif !defined(__OpenBSD__)
891 pthread_attr_getstack (&attr, (void**)staddr, stsize);
894 g_assert ((current > *staddr) && (current < *staddr + *stsize));
897 pthread_attr_destroy (&attr);
900 /* When running under emacs, sometimes staddr is not aligned to a page size */
901 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
905 mono_thread_attach (MonoDomain *domain)
907 MonoThreadInfo *info;
908 MonoInternalThread *thread;
909 MonoThread *current_thread;
910 HANDLE thread_handle;
913 if ((thread = mono_thread_internal_current ())) {
914 if (domain != mono_domain_get ())
915 mono_domain_set (domain, TRUE);
916 /* Already attached */
917 return mono_thread_current ();
920 if (!mono_gc_register_thread (&domain)) {
921 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 ());
924 thread = create_internal_thread_object ();
926 thread_handle = GetCurrentThread ();
927 g_assert (thread_handle);
929 tid=GetCurrentThreadId ();
932 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
933 * refer to the thread from other threads for things like aborting.
935 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
936 THREAD_ALL_ACCESS, TRUE, 0);
938 thread->handle=thread_handle;
940 #ifdef PLATFORM_ANDROID
941 thread->android_tid = (gpointer) gettid ();
943 thread->apartment_state=ThreadApartmentState_Unknown;
944 thread->managed_id = get_next_managed_thread_id ();
945 if (mono_gc_is_moving ()) {
946 thread->thread_pinning_ref = thread;
947 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
950 thread->stack_ptr = &tid;
952 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
953 InitializeCriticalSection (thread->synch_cs);
955 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
957 info = mono_thread_info_current ();
959 thread->thread_info = info;
961 current_thread = new_thread_with_internal (domain, thread);
963 if (!handle_store (current_thread)) {
964 /* Mono is shutting down, so just wait for the end */
969 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
971 SET_CURRENT_OBJECT (thread);
972 mono_domain_set (domain, TRUE);
974 mono_monitor_init_tls ();
976 thread_adjust_static_data (thread);
978 init_root_domain_thread (thread, current_thread);
979 if (domain != mono_get_root_domain ())
980 set_current_thread_for_domain (domain, thread, current_thread);
983 if (mono_thread_attach_cb) {
987 mono_thread_get_stack_bounds (&staddr, &stsize);
990 mono_thread_attach_cb (tid, &tid);
992 mono_thread_attach_cb (tid, staddr + stsize);
995 // FIXME: Need a separate callback
996 mono_profiler_thread_start (tid);
998 return current_thread;
1002 mono_thread_detach (MonoThread *thread)
1004 g_return_if_fail (thread != NULL);
1006 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
1008 thread_cleanup (thread->internal_thread);
1010 SET_CURRENT_OBJECT (NULL);
1011 mono_domain_unset ();
1013 /* Don't need to CloseHandle this thread, even though we took a
1014 * reference in mono_thread_attach (), because the GC will do it
1015 * when the Thread object is finalised.
1022 MonoInternalThread *thread = mono_thread_internal_current ();
1024 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1026 thread_cleanup (thread);
1027 SET_CURRENT_OBJECT (NULL);
1028 mono_domain_unset ();
1030 /* we could add a callback here for embedders to use. */
1031 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1032 exit (mono_environment_exitcode_get ());
1037 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1039 MonoInternalThread *internal = create_internal_thread_object ();
1041 internal->state = ThreadState_Unstarted;
1042 internal->apartment_state = ThreadApartmentState_Unknown;
1043 internal->managed_id = get_next_managed_thread_id ();
1045 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1048 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
1051 guint32 (*start_func)(void *);
1052 struct StartInfo *start_info;
1055 MonoInternalThread *internal;
1057 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1059 if (!this->internal_thread)
1060 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1061 internal = this->internal_thread;
1063 ensure_synch_cs_set (internal);
1065 EnterCriticalSection (internal->synch_cs);
1067 if ((internal->state & ThreadState_Unstarted) == 0) {
1068 LeaveCriticalSection (internal->synch_cs);
1069 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1073 if ((internal->state & ThreadState_Aborted) != 0) {
1074 LeaveCriticalSection (internal->synch_cs);
1079 /* This is freed in start_wrapper */
1080 start_info = g_new0 (struct StartInfo, 1);
1081 start_info->func = start_func;
1082 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1083 start_info->delegate = start;
1084 start_info->obj = this;
1085 g_assert (this->obj.vtable->domain == mono_domain_get ());
1087 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1088 if (internal->start_notify==NULL) {
1089 LeaveCriticalSection (internal->synch_cs);
1090 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1091 g_free (start_info);
1095 mono_threads_lock ();
1096 register_thread_start_argument (this, start_info);
1097 if (threads_starting_up == NULL) {
1098 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1099 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1101 mono_g_hash_table_insert (threads_starting_up, this, this);
1102 mono_threads_unlock ();
1104 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1105 CREATE_SUSPENDED, &tid);
1107 LeaveCriticalSection (internal->synch_cs);
1108 mono_threads_lock ();
1109 mono_g_hash_table_remove (threads_starting_up, this);
1110 mono_threads_unlock ();
1111 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1115 internal->handle=thread;
1117 if (mono_gc_is_moving ()) {
1118 internal->thread_pinning_ref = internal;
1119 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1123 /* Don't call handle_store() here, delay it to Start.
1124 * We can't join a thread (trying to will just block
1125 * forever) until it actually starts running, so don't
1126 * store the handle till then.
1129 mono_thread_start (this);
1131 internal->state &= ~ThreadState_Unstarted;
1133 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1135 LeaveCriticalSection (internal->synch_cs);
1140 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1142 MONO_ARCH_SAVE_REGS;
1144 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1147 CloseHandle (thread);
1149 if (this->synch_cs) {
1150 CRITICAL_SECTION *synch_cs = this->synch_cs;
1151 this->synch_cs = NULL;
1152 DeleteCriticalSection (synch_cs);
1157 void *name = this->name;
1163 static void mono_thread_start (MonoThread *thread)
1165 MonoInternalThread *internal = thread->internal_thread;
1167 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1169 /* Only store the handle when the thread is about to be
1170 * launched, to avoid the main thread deadlocking while trying
1171 * to clean up a thread that will never be signalled.
1173 if (!handle_store (thread))
1176 ResumeThread (internal->handle);
1178 if(internal->start_notify!=NULL) {
1179 /* Wait for the thread to set up its TLS data etc, so
1180 * theres no potential race condition if someone tries
1181 * to look up the data believing the thread has
1185 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1187 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1188 CloseHandle (internal->start_notify);
1189 internal->start_notify = NULL;
1192 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1195 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1198 MonoInternalThread *thread = mono_thread_internal_current ();
1200 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1202 mono_thread_current_check_pending_interrupt ();
1205 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1207 res = SleepEx(ms,TRUE);
1209 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1211 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1212 MonoException* exc = mono_thread_execute_interruption (thread);
1214 mono_raise_exception (exc);
1226 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1231 ves_icall_System_Threading_Thread_GetDomainID (void)
1233 MONO_ARCH_SAVE_REGS;
1235 return mono_domain_get()->domain_id;
1239 ves_icall_System_Threading_Thread_Yield (void)
1242 return SwitchToThread ();
1244 return sched_yield () == 0;
1249 * mono_thread_get_name:
1251 * Return the name of the thread. NAME_LEN is set to the length of the name.
1252 * Return NULL if the thread has no name. The returned memory is owned by the
1256 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1260 ensure_synch_cs_set (this_obj);
1262 EnterCriticalSection (this_obj->synch_cs);
1264 if (!this_obj->name) {
1268 *name_len = this_obj->name_len;
1269 res = g_new (gunichar2, this_obj->name_len);
1270 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1273 LeaveCriticalSection (this_obj->synch_cs);
1279 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1283 ensure_synch_cs_set (this_obj);
1285 EnterCriticalSection (this_obj->synch_cs);
1287 if (!this_obj->name)
1290 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1292 LeaveCriticalSection (this_obj->synch_cs);
1298 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1300 ensure_synch_cs_set (this_obj);
1302 EnterCriticalSection (this_obj->synch_cs);
1304 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1305 LeaveCriticalSection (this_obj->synch_cs);
1307 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1311 this_obj->name = g_new (gunichar2, mono_string_length (name));
1312 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1313 this_obj->name_len = mono_string_length (name);
1316 this_obj->name = NULL;
1319 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1321 LeaveCriticalSection (this_obj->synch_cs);
1322 if (this_obj->name) {
1323 char *tname = mono_string_to_utf8 (name);
1324 mono_profiler_thread_name (this_obj->tid, tname);
1330 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1332 mono_thread_set_name_internal (this_obj, name, TRUE);
1335 /* If the array is already in the requested domain, we just return it,
1336 otherwise we return a copy in that domain. */
1338 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1345 if (mono_object_domain (arr) == domain)
1348 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1349 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1354 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1356 return byte_array_to_domain (arr, mono_get_root_domain ());
1360 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1362 return byte_array_to_domain (arr, mono_domain_get ());
1366 mono_thread_current (void)
1368 MonoDomain *domain = mono_domain_get ();
1369 MonoInternalThread *internal = mono_thread_internal_current ();
1370 MonoThread **current_thread_ptr;
1372 g_assert (internal);
1373 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1375 if (!*current_thread_ptr) {
1376 g_assert (domain != mono_get_root_domain ());
1377 *current_thread_ptr = new_thread_with_internal (domain, internal);
1379 return *current_thread_ptr;
1383 mono_thread_internal_current (void)
1385 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1386 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1390 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1391 int ms, HANDLE thread)
1393 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1396 mono_thread_current_check_pending_interrupt ();
1398 ensure_synch_cs_set (this);
1400 EnterCriticalSection (this->synch_cs);
1402 if ((this->state & ThreadState_Unstarted) != 0) {
1403 LeaveCriticalSection (this->synch_cs);
1405 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1409 LeaveCriticalSection (this->synch_cs);
1414 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1416 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1418 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1420 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1422 if(ret==WAIT_OBJECT_0) {
1423 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1428 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1434 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1442 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1445 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1447 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1449 if (ret != WAIT_IO_COMPLETION)
1452 exc = mono_thread_execute_interruption (thread);
1454 mono_raise_exception (exc);
1459 /* Re-calculate ms according to the time passed */
1460 diff_ms = (mono_100ns_ticks () - start) / 10000;
1461 if (diff_ms >= ms) {
1465 wait = ms - diff_ms;
1471 /* FIXME: exitContext isnt documented */
1472 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1478 MonoObject *waitHandle;
1479 MonoInternalThread *thread = mono_thread_internal_current ();
1481 /* Do this WaitSleepJoin check before creating objects */
1482 mono_thread_current_check_pending_interrupt ();
1484 numhandles = mono_array_length(mono_handles);
1485 handles = g_new0(HANDLE, numhandles);
1487 for(i = 0; i < numhandles; i++) {
1488 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1489 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1496 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1498 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1500 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1504 if(ret==WAIT_FAILED) {
1505 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1507 } else if(ret==WAIT_TIMEOUT) {
1508 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1515 /* FIXME: exitContext isnt documented */
1516 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1518 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1522 MonoObject *waitHandle;
1523 MonoInternalThread *thread = mono_thread_internal_current ();
1525 /* Do this WaitSleepJoin check before creating objects */
1526 mono_thread_current_check_pending_interrupt ();
1528 numhandles = mono_array_length(mono_handles);
1529 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1532 for(i = 0; i < numhandles; i++) {
1533 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1534 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1541 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1543 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1545 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1547 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1550 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1552 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1553 return ret - WAIT_OBJECT_0;
1555 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1556 return ret - WAIT_ABANDONED_0;
1563 /* FIXME: exitContext isnt documented */
1564 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1567 MonoInternalThread *thread = mono_thread_internal_current ();
1569 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1575 mono_thread_current_check_pending_interrupt ();
1577 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1579 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1581 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1583 if(ret==WAIT_FAILED) {
1584 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1586 } else if(ret==WAIT_TIMEOUT) {
1587 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1595 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1598 MonoInternalThread *thread = mono_thread_internal_current ();
1600 MONO_ARCH_SAVE_REGS;
1605 mono_thread_current_check_pending_interrupt ();
1607 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1609 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1611 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1613 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1616 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1620 MONO_ARCH_SAVE_REGS;
1625 mutex = CreateMutex (NULL, owned, NULL);
1627 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1629 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1637 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1638 MONO_ARCH_SAVE_REGS;
1640 return(ReleaseMutex (handle));
1643 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1649 MONO_ARCH_SAVE_REGS;
1651 *error = ERROR_SUCCESS;
1653 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1655 *error = GetLastError ();
1662 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1666 MONO_ARCH_SAVE_REGS;
1671 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1673 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1674 mono_string_chars (name));
1676 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1684 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1688 MONO_ARCH_SAVE_REGS;
1690 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1695 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1699 MONO_ARCH_SAVE_REGS;
1701 *error = ERROR_SUCCESS;
1703 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1705 *error = GetLastError ();
1711 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1715 MONO_ARCH_SAVE_REGS;
1720 event = CreateEvent (NULL, manual, initial, NULL);
1722 event = CreateEvent (NULL, manual, initial,
1723 mono_string_chars (name));
1725 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1733 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1734 MONO_ARCH_SAVE_REGS;
1736 return (SetEvent(handle));
1739 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1740 MONO_ARCH_SAVE_REGS;
1742 return (ResetEvent(handle));
1746 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1747 MONO_ARCH_SAVE_REGS;
1749 CloseHandle (handle);
1752 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1758 MONO_ARCH_SAVE_REGS;
1760 *error = ERROR_SUCCESS;
1762 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1764 *error = GetLastError ();
1770 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1772 MONO_ARCH_SAVE_REGS;
1774 return InterlockedIncrement (location);
1777 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1781 MONO_ARCH_SAVE_REGS;
1783 mono_interlocked_lock ();
1787 mono_interlocked_unlock ();
1793 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1795 MONO_ARCH_SAVE_REGS;
1797 return InterlockedDecrement(location);
1800 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1804 MONO_ARCH_SAVE_REGS;
1806 mono_interlocked_lock ();
1810 mono_interlocked_unlock ();
1815 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1817 MONO_ARCH_SAVE_REGS;
1819 return InterlockedExchange(location, value);
1822 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1825 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1826 mono_gc_wbarrier_generic_nostore (location);
1830 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1832 return InterlockedExchangePointer(location, value);
1835 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1837 IntFloatUnion val, ret;
1839 MONO_ARCH_SAVE_REGS;
1842 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1848 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1850 #if SIZEOF_VOID_P == 8
1851 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1856 * According to MSDN, this function is only atomic with regards to the
1857 * other Interlocked functions on 32 bit platforms.
1859 mono_interlocked_lock ();
1862 mono_interlocked_unlock ();
1869 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1871 #if SIZEOF_VOID_P == 8
1872 LongDoubleUnion val, ret;
1875 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1882 * According to MSDN, this function is only atomic with regards to the
1883 * other Interlocked functions on 32 bit platforms.
1885 mono_interlocked_lock ();
1888 mono_interlocked_unlock ();
1894 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1896 MONO_ARCH_SAVE_REGS;
1898 return InterlockedCompareExchange(location, value, comparand);
1901 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1904 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1905 mono_gc_wbarrier_generic_nostore (location);
1909 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1911 return InterlockedCompareExchangePointer(location, value, comparand);
1914 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1916 IntFloatUnion val, ret, cmp;
1918 MONO_ARCH_SAVE_REGS;
1921 cmp.fval = comparand;
1922 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1928 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1930 #if SIZEOF_VOID_P == 8
1931 LongDoubleUnion val, comp, ret;
1934 comp.fval = comparand;
1935 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1941 mono_interlocked_lock ();
1943 if (old == comparand)
1945 mono_interlocked_unlock ();
1952 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1954 #if SIZEOF_VOID_P == 8
1955 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1959 mono_interlocked_lock ();
1961 if (old == comparand)
1963 mono_interlocked_unlock ();
1970 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1973 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1974 mono_gc_wbarrier_generic_nostore (location);
1979 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1982 res = InterlockedExchangePointer ((gpointer *)location, value);
1983 mono_gc_wbarrier_generic_nostore (location);
1988 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1990 #if SIZEOF_VOID_P == 8
1991 /* Should be implemented as a JIT intrinsic */
1992 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1997 mono_interlocked_lock ();
1999 *location = orig + value;
2000 mono_interlocked_unlock ();
2002 return orig + value;
2007 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2009 #if SIZEOF_VOID_P == 8
2010 /* Should be implemented as a JIT intrinsic */
2011 mono_raise_exception (mono_get_exception_not_implemented (NULL));
2016 mono_interlocked_lock ();
2018 *location = orig + value;
2019 mono_interlocked_unlock ();
2021 return orig + value;
2026 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2028 #if SIZEOF_VOID_P == 8
2029 /* 64 bit reads are already atomic */
2034 mono_interlocked_lock ();
2036 mono_interlocked_unlock ();
2043 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2045 mono_threads_lock ();
2046 mono_threads_unlock ();
2050 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
2052 mono_thread_clr_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_SetState (MonoInternalThread* this, guint32 state)
2066 mono_thread_set_state (this, state);
2068 if (state & ThreadState_Background) {
2069 /* If the thread changes the background mode, the main thread has to
2070 * be notified, since it has to rebuild the list of threads to
2073 SetEvent (background_change_event);
2078 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2082 ensure_synch_cs_set (this);
2084 EnterCriticalSection (this->synch_cs);
2086 state = this->state;
2088 LeaveCriticalSection (this->synch_cs);
2093 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2095 MonoInternalThread *current;
2098 ensure_synch_cs_set (this);
2100 current = mono_thread_internal_current ();
2102 EnterCriticalSection (this->synch_cs);
2104 this->thread_interrupt_requested = TRUE;
2105 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2107 LeaveCriticalSection (this->synch_cs);
2110 abort_thread_internal (this, TRUE, FALSE);
2114 void mono_thread_current_check_pending_interrupt ()
2116 MonoInternalThread *thread = mono_thread_internal_current ();
2117 gboolean throw = FALSE;
2119 mono_debugger_check_interruption ();
2121 ensure_synch_cs_set (thread);
2123 EnterCriticalSection (thread->synch_cs);
2125 if (thread->thread_interrupt_requested) {
2127 thread->thread_interrupt_requested = FALSE;
2130 LeaveCriticalSection (thread->synch_cs);
2133 mono_raise_exception (mono_get_exception_thread_interrupted ());
2138 mono_thread_get_abort_signal (void)
2142 #elif defined(PLATFORM_ANDROID)
2144 #elif !defined (SIGRTMIN)
2149 #endif /* SIGUSR1 */
2151 static int abort_signum = -1;
2153 if (abort_signum != -1)
2154 return abort_signum;
2155 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2156 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2157 struct sigaction sinfo;
2158 sigaction (i, NULL, &sinfo);
2159 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2164 /* fallback to the old way */
2166 #endif /* HOST_WIN32 */
2170 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2172 MonoException* exc = mono_thread_request_interruption (FALSE);
2173 if (exc) mono_raise_exception (exc);
2175 #endif /* HOST_WIN32 */
2178 * signal_thread_state_change
2180 * Tells the thread that his state has changed and it has to enter the new
2181 * state as soon as possible.
2183 static void signal_thread_state_change (MonoInternalThread *thread)
2185 if (thread == mono_thread_internal_current ()) {
2186 /* Do it synchronously */
2187 MonoException *exc = mono_thread_request_interruption (FALSE);
2189 mono_raise_exception (exc);
2193 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2195 /* fixme: store the state somewhere */
2196 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2199 * This will cause waits to be broken.
2200 * It will also prevent the thread from entering a wait, so if the thread returns
2201 * from the wait before it receives the abort signal, it will just spin in the wait
2202 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2205 wapi_interrupt_thread (thread->handle);
2206 #endif /* HOST_WIN32 */
2210 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2212 ensure_synch_cs_set (thread);
2214 EnterCriticalSection (thread->synch_cs);
2216 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2217 (thread->state & ThreadState_StopRequested) != 0 ||
2218 (thread->state & ThreadState_Stopped) != 0)
2220 LeaveCriticalSection (thread->synch_cs);
2224 if ((thread->state & ThreadState_Unstarted) != 0) {
2225 thread->state |= ThreadState_Aborted;
2226 LeaveCriticalSection (thread->synch_cs);
2230 thread->state |= ThreadState_AbortRequested;
2231 if (thread->abort_state_handle)
2232 mono_gchandle_free (thread->abort_state_handle);
2234 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2235 g_assert (thread->abort_state_handle);
2237 thread->abort_state_handle = 0;
2239 thread->abort_exc = NULL;
2242 * abort_exc is set in mono_thread_execute_interruption(),
2243 * triggered by the call to signal_thread_state_change(),
2244 * below. There's a point between where we have
2245 * abort_state_handle set, but abort_exc NULL, but that's not
2249 LeaveCriticalSection (thread->synch_cs);
2251 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2253 /* During shutdown, we can't wait for other threads */
2255 /* Make sure the thread is awake */
2256 mono_thread_resume (thread);
2258 abort_thread_internal (thread, TRUE, TRUE);
2262 ves_icall_System_Threading_Thread_ResetAbort (void)
2264 MonoInternalThread *thread = mono_thread_internal_current ();
2265 gboolean was_aborting;
2267 ensure_synch_cs_set (thread);
2269 EnterCriticalSection (thread->synch_cs);
2270 was_aborting = thread->state & ThreadState_AbortRequested;
2271 thread->state &= ~ThreadState_AbortRequested;
2272 LeaveCriticalSection (thread->synch_cs);
2274 if (!was_aborting) {
2275 const char *msg = "Unable to reset abort because no abort was requested";
2276 mono_raise_exception (mono_get_exception_thread_state (msg));
2278 thread->abort_exc = NULL;
2279 if (thread->abort_state_handle) {
2280 mono_gchandle_free (thread->abort_state_handle);
2281 /* This is actually not necessary - the handle
2282 only counts if the exception is set */
2283 thread->abort_state_handle = 0;
2288 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2290 ensure_synch_cs_set (thread);
2292 EnterCriticalSection (thread->synch_cs);
2294 thread->state &= ~ThreadState_AbortRequested;
2296 if (thread->abort_exc) {
2297 thread->abort_exc = NULL;
2298 if (thread->abort_state_handle) {
2299 mono_gchandle_free (thread->abort_state_handle);
2300 /* This is actually not necessary - the handle
2301 only counts if the exception is set */
2302 thread->abort_state_handle = 0;
2306 LeaveCriticalSection (thread->synch_cs);
2310 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2312 MonoInternalThread *thread = this->internal_thread;
2313 MonoObject *state, *deserialized = NULL, *exc;
2316 if (!thread->abort_state_handle)
2319 state = mono_gchandle_get_target (thread->abort_state_handle);
2322 domain = mono_domain_get ();
2323 if (mono_object_domain (state) == domain)
2326 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2328 if (!deserialized) {
2329 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2331 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2332 mono_raise_exception (invalid_op_exc);
2335 return deserialized;
2339 mono_thread_suspend (MonoInternalThread *thread)
2341 ensure_synch_cs_set (thread);
2343 EnterCriticalSection (thread->synch_cs);
2345 if ((thread->state & ThreadState_Unstarted) != 0 ||
2346 (thread->state & ThreadState_Aborted) != 0 ||
2347 (thread->state & ThreadState_Stopped) != 0)
2349 LeaveCriticalSection (thread->synch_cs);
2353 if ((thread->state & ThreadState_Suspended) != 0 ||
2354 (thread->state & ThreadState_SuspendRequested) != 0 ||
2355 (thread->state & ThreadState_StopRequested) != 0)
2357 LeaveCriticalSection (thread->synch_cs);
2361 thread->state |= ThreadState_SuspendRequested;
2363 LeaveCriticalSection (thread->synch_cs);
2365 suspend_thread_internal (thread, FALSE);
2370 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2372 if (!mono_thread_suspend (thread))
2373 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2377 mono_thread_resume (MonoInternalThread *thread)
2379 ensure_synch_cs_set (thread);
2381 EnterCriticalSection (thread->synch_cs);
2383 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2384 thread->state &= ~ThreadState_SuspendRequested;
2385 LeaveCriticalSection (thread->synch_cs);
2389 if ((thread->state & ThreadState_Suspended) == 0 ||
2390 (thread->state & ThreadState_Unstarted) != 0 ||
2391 (thread->state & ThreadState_Aborted) != 0 ||
2392 (thread->state & ThreadState_Stopped) != 0)
2394 LeaveCriticalSection (thread->synch_cs);
2398 return resume_thread_internal (thread);
2402 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2404 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2405 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2409 mono_threads_is_critical_method (MonoMethod *method)
2411 switch (method->wrapper_type) {
2412 case MONO_WRAPPER_RUNTIME_INVOKE:
2413 case MONO_WRAPPER_XDOMAIN_INVOKE:
2414 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2421 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2426 if (mono_threads_is_critical_method (m)) {
2427 *((gboolean*)data) = TRUE;
2434 is_running_protected_wrapper (void)
2436 gboolean found = FALSE;
2437 mono_stack_walk (find_wrapper, &found);
2441 void mono_thread_internal_stop (MonoInternalThread *thread)
2443 ensure_synch_cs_set (thread);
2445 EnterCriticalSection (thread->synch_cs);
2447 if ((thread->state & ThreadState_StopRequested) != 0 ||
2448 (thread->state & ThreadState_Stopped) != 0)
2450 LeaveCriticalSection (thread->synch_cs);
2454 /* Make sure the thread is awake */
2455 mono_thread_resume (thread);
2457 thread->state |= ThreadState_StopRequested;
2458 thread->state &= ~ThreadState_AbortRequested;
2460 LeaveCriticalSection (thread->synch_cs);
2462 abort_thread_internal (thread, TRUE, TRUE);
2465 void mono_thread_stop (MonoThread *thread)
2467 mono_thread_internal_stop (thread->internal_thread);
2471 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2473 return *((volatile gint8 *) (ptr));
2477 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2479 return *((volatile gint16 *) (ptr));
2483 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2485 return *((volatile gint32 *) (ptr));
2489 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2491 return *((volatile gint64 *) (ptr));
2495 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2497 return (void *) *((volatile void **) ptr);
2501 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2503 return *((volatile double *) (ptr));
2507 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2509 return *((volatile float *) (ptr));
2513 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2515 return (MonoObject*)*((volatile MonoObject**)ptr);
2519 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2521 *((volatile gint8 *) ptr) = value;
2525 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2527 *((volatile gint16 *) ptr) = value;
2531 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2533 *((volatile gint32 *) ptr) = value;
2537 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2539 *((volatile gint64 *) ptr) = value;
2543 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2545 *((volatile void **) ptr) = value;
2549 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2551 mono_gc_wbarrier_generic_store (ptr, value);
2555 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2557 *((volatile double *) ptr) = value;
2561 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2563 *((volatile float *) ptr) = value;
2567 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2569 *((volatile MonoObject **) ptr) = value;
2570 mono_gc_wbarrier_generic_nostore (ptr);
2573 void mono_thread_init (MonoThreadStartCB start_cb,
2574 MonoThreadAttachCB attach_cb)
2576 InitializeCriticalSection(&threads_mutex);
2577 InitializeCriticalSection(&interlocked_mutex);
2578 InitializeCriticalSection(&contexts_mutex);
2580 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2581 g_assert(background_change_event != NULL);
2583 mono_init_static_data_info (&thread_static_info);
2584 mono_init_static_data_info (&context_static_info);
2586 MONO_FAST_TLS_INIT (tls_current_object);
2587 mono_native_tls_alloc (¤t_object_key, NULL);
2588 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2590 mono_thread_start_cb = start_cb;
2591 mono_thread_attach_cb = attach_cb;
2593 /* Get a pseudo handle to the current process. This is just a
2594 * kludge so that wapi can build a process handle if needed.
2595 * As a pseudo handle is returned, we don't need to clean
2598 GetCurrentProcess ();
2601 void mono_thread_cleanup (void)
2603 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2604 /* The main thread must abandon any held mutexes (particularly
2605 * important for named mutexes as they are shared across
2606 * processes, see bug 74680.) This will happen when the
2607 * thread exits, but if it's not running in a subthread it
2608 * won't exit in time.
2610 /* Using non-w32 API is a nasty kludge, but I couldn't find
2611 * anything in the documentation that would let me do this
2612 * here yet still be safe to call on windows.
2614 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2618 /* This stuff needs more testing, it seems one of these
2619 * critical sections can be locked when mono_thread_cleanup is
2622 DeleteCriticalSection (&threads_mutex);
2623 DeleteCriticalSection (&interlocked_mutex);
2624 DeleteCriticalSection (&contexts_mutex);
2625 DeleteCriticalSection (&delayed_free_table_mutex);
2626 DeleteCriticalSection (&small_id_mutex);
2627 CloseHandle (background_change_event);
2630 mono_native_tls_free (current_object_key);
2634 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2636 mono_thread_cleanup_fn = func;
2640 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2642 thread->internal_thread->manage_callback = func;
2645 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2647 mono_thread_notify_pending_exc_fn = func;
2651 static void print_tids (gpointer key, gpointer value, gpointer user)
2653 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2654 * sizeof(uint) and a cast to uint would overflow
2656 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2657 * print this as a pointer.
2659 g_message ("Waiting for: %p", key);
2664 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2665 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2669 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2673 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2675 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2677 if(ret==WAIT_FAILED) {
2678 /* See the comment in build_wait_tids() */
2679 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2683 for(i=0; i<wait->num; i++)
2684 CloseHandle (wait->handles[i]);
2686 if (ret == WAIT_TIMEOUT)
2689 for(i=0; i<wait->num; i++) {
2690 gsize tid = wait->threads[i]->tid;
2692 mono_threads_lock ();
2693 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2694 /* This thread must have been killed, because
2695 * it hasn't cleaned itself up. (It's just
2696 * possible that the thread exited before the
2697 * parent thread had a chance to store the
2698 * handle, and now there is another pointer to
2699 * the already-exited thread stored. In this
2700 * case, we'll just get two
2701 * mono_profiler_thread_end() calls for the
2705 mono_threads_unlock ();
2706 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2707 thread_cleanup (wait->threads[i]);
2709 mono_threads_unlock ();
2714 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2716 guint32 i, ret, count;
2718 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2720 /* Add the thread state change event, so it wakes up if a thread changes
2721 * to background mode.
2724 if (count < MAXIMUM_WAIT_OBJECTS) {
2725 wait->handles [count] = background_change_event;
2729 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2731 if(ret==WAIT_FAILED) {
2732 /* See the comment in build_wait_tids() */
2733 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2737 for(i=0; i<wait->num; i++)
2738 CloseHandle (wait->handles[i]);
2740 if (ret == WAIT_TIMEOUT)
2743 if (ret < wait->num) {
2744 gsize tid = wait->threads[ret]->tid;
2745 mono_threads_lock ();
2746 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2747 /* See comment in wait_for_tids about thread cleanup */
2748 mono_threads_unlock ();
2749 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2750 thread_cleanup (wait->threads [ret]);
2752 mono_threads_unlock ();
2756 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2758 struct wait_data *wait=(struct wait_data *)user;
2760 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2762 MonoInternalThread *thread=(MonoInternalThread *)value;
2764 /* Ignore background threads, we abort them later */
2765 /* Do not lock here since it is not needed and the caller holds threads_lock */
2766 if (thread->state & ThreadState_Background) {
2767 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2768 return; /* just leave, ignore */
2771 if (mono_gc_is_finalizer_internal_thread (thread)) {
2772 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2776 if (thread == mono_thread_internal_current ()) {
2777 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2781 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2782 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2786 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2787 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2791 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2792 if (handle == NULL) {
2793 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2797 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2798 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2799 wait->handles[wait->num]=handle;
2800 wait->threads[wait->num]=thread;
2803 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2805 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2810 /* Just ignore the rest, we can't do anything with
2817 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2819 struct wait_data *wait=(struct wait_data *)user;
2820 gsize self = GetCurrentThreadId ();
2821 MonoInternalThread *thread = value;
2824 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2827 /* The finalizer thread is not a background thread */
2828 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2829 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2831 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2835 /* printf ("A: %d\n", wait->num); */
2836 wait->handles[wait->num]=thread->handle;
2837 wait->threads[wait->num]=thread;
2840 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2841 mono_thread_internal_stop (thread);
2845 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2849 * mono_threads_set_shutting_down:
2851 * Is called by a thread that wants to shut down Mono. If the runtime is already
2852 * shutting down, the calling thread is suspended/stopped, and this function never
2856 mono_threads_set_shutting_down (void)
2858 MonoInternalThread *current_thread = mono_thread_internal_current ();
2860 mono_threads_lock ();
2862 if (shutting_down) {
2863 mono_threads_unlock ();
2865 /* Make sure we're properly suspended/stopped */
2867 EnterCriticalSection (current_thread->synch_cs);
2869 if ((current_thread->state & ThreadState_SuspendRequested) ||
2870 (current_thread->state & ThreadState_AbortRequested) ||
2871 (current_thread->state & ThreadState_StopRequested)) {
2872 LeaveCriticalSection (current_thread->synch_cs);
2873 mono_thread_execute_interruption (current_thread);
2875 current_thread->state |= ThreadState_Stopped;
2876 LeaveCriticalSection (current_thread->synch_cs);
2879 /*since we're killing the thread, unset the current domain.*/
2880 mono_domain_unset ();
2882 /* Wake up other threads potentially waiting for us */
2885 shutting_down = TRUE;
2887 /* Not really a background state change, but this will
2888 * interrupt the main thread if it is waiting for all
2889 * the other threads.
2891 SetEvent (background_change_event);
2893 mono_threads_unlock ();
2898 * mono_threads_is_shutting_down:
2900 * Returns whether a thread has commenced shutdown of Mono. Note that
2901 * if the function returns FALSE the caller must not assume that
2902 * shutdown is not in progress, because the situation might have
2903 * changed since the function returned. For that reason this function
2904 * is of very limited utility.
2907 mono_threads_is_shutting_down (void)
2909 return shutting_down;
2912 void mono_thread_manage (void)
2914 struct wait_data wait_data;
2915 struct wait_data *wait = &wait_data;
2917 memset (wait, 0, sizeof (struct wait_data));
2918 /* join each thread that's still running */
2919 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2921 mono_threads_lock ();
2923 THREAD_DEBUG (g_message("%s: No threads", __func__));
2924 mono_threads_unlock ();
2927 mono_threads_unlock ();
2930 mono_threads_lock ();
2931 if (shutting_down) {
2932 /* somebody else is shutting down */
2933 mono_threads_unlock ();
2936 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2937 mono_g_hash_table_foreach (threads, print_tids, NULL));
2939 ResetEvent (background_change_event);
2941 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2942 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2943 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2944 mono_threads_unlock ();
2946 /* Something to wait for */
2947 wait_for_tids_or_state_change (wait, INFINITE);
2949 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2950 } while(wait->num>0);
2952 mono_runtime_shutdown ();
2954 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2955 mono_thread_pool_cleanup ();
2958 * Remove everything but the finalizer thread and self.
2959 * Also abort all the background threads
2962 mono_threads_lock ();
2965 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2966 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2967 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2969 mono_threads_unlock ();
2971 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2973 /* Something to wait for */
2974 wait_for_tids (wait, INFINITE);
2976 } while (wait->num > 0);
2979 * give the subthreads a chance to really quit (this is mainly needed
2980 * to get correct user and system times from getrusage/wait/time(1)).
2981 * This could be removed if we avoid pthread_detach() and use pthread_join().
2988 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2990 MonoInternalThread *thread=(MonoInternalThread *)value;
2992 if(thread->tid != (gsize)user) {
2993 /*TerminateThread (thread->handle, -1);*/
2997 void mono_thread_abort_all_other_threads (void)
2999 gsize self = GetCurrentThreadId ();
3001 mono_threads_lock ();
3002 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
3003 mono_g_hash_table_size (threads));
3004 mono_g_hash_table_foreach (threads, print_tids, NULL));
3006 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3008 mono_threads_unlock ();
3012 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3014 MonoInternalThread *thread = (MonoInternalThread*)value;
3015 struct wait_data *wait = (struct wait_data*)user_data;
3019 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3021 * This needs no locking.
3023 if ((thread->state & ThreadState_Suspended) != 0 ||
3024 (thread->state & ThreadState_Stopped) != 0)
3027 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3028 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3032 wait->handles [wait->num] = handle;
3033 wait->threads [wait->num] = thread;
3039 * mono_thread_suspend_all_other_threads:
3041 * Suspend all managed threads except the finalizer thread and this thread. It is
3042 * not possible to resume them later.
3044 void mono_thread_suspend_all_other_threads (void)
3046 struct wait_data wait_data;
3047 struct wait_data *wait = &wait_data;
3049 gsize self = GetCurrentThreadId ();
3051 guint32 eventidx = 0;
3052 gboolean starting, finished;
3054 memset (wait, 0, sizeof (struct wait_data));
3056 * The other threads could be in an arbitrary state at this point, i.e.
3057 * they could be starting up, shutting down etc. This means that there could be
3058 * threads which are not even in the threads hash table yet.
3062 * First we set a barrier which will be checked by all threads before they
3063 * are added to the threads hash table, and they will exit if the flag is set.
3064 * This ensures that no threads could be added to the hash later.
3065 * We will use shutting_down as the barrier for now.
3067 g_assert (shutting_down);
3070 * We make multiple calls to WaitForMultipleObjects since:
3071 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3072 * - some threads could exit without becoming suspended
3077 * Make a copy of the hashtable since we can't do anything with
3078 * threads while threads_mutex is held.
3081 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3082 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3083 mono_threads_lock ();
3084 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3085 mono_threads_unlock ();
3087 events = g_new0 (gpointer, wait->num);
3089 /* Get the suspended events that we'll be waiting for */
3090 for (i = 0; i < wait->num; ++i) {
3091 MonoInternalThread *thread = wait->threads [i];
3092 gboolean signal_suspend = FALSE;
3094 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3095 //CloseHandle (wait->handles [i]);
3096 wait->threads [i] = NULL; /* ignore this thread in next loop */
3100 ensure_synch_cs_set (thread);
3102 EnterCriticalSection (thread->synch_cs);
3104 if (thread->suspended_event == NULL) {
3105 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3106 if (thread->suspended_event == NULL) {
3107 /* Forget this one and go on to the next */
3108 LeaveCriticalSection (thread->synch_cs);
3113 if ((thread->state & ThreadState_Suspended) != 0 ||
3114 (thread->state & ThreadState_StopRequested) != 0 ||
3115 (thread->state & ThreadState_Stopped) != 0) {
3116 LeaveCriticalSection (thread->synch_cs);
3117 CloseHandle (wait->handles [i]);
3118 wait->threads [i] = NULL; /* ignore this thread in next loop */
3122 if ((thread->state & ThreadState_SuspendRequested) == 0)
3123 signal_suspend = TRUE;
3125 events [eventidx++] = thread->suspended_event;
3127 /* Convert abort requests into suspend requests */
3128 if ((thread->state & ThreadState_AbortRequested) != 0)
3129 thread->state &= ~ThreadState_AbortRequested;
3131 thread->state |= ThreadState_SuspendRequested;
3133 LeaveCriticalSection (thread->synch_cs);
3135 /* Signal the thread to suspend */
3136 if (mono_thread_info_new_interrupt_enabled ())
3137 suspend_thread_internal (thread, TRUE);
3138 else if (signal_suspend)
3139 signal_thread_state_change (thread);
3142 /*Only wait on the suspend event if we are using the old path */
3143 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3144 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3145 for (i = 0; i < wait->num; ++i) {
3146 MonoInternalThread *thread = wait->threads [i];
3151 ensure_synch_cs_set (thread);
3153 EnterCriticalSection (thread->synch_cs);
3154 if ((thread->state & ThreadState_Suspended) != 0) {
3155 CloseHandle (thread->suspended_event);
3156 thread->suspended_event = NULL;
3158 LeaveCriticalSection (thread->synch_cs);
3162 if (eventidx <= 0) {
3164 * If there are threads which are starting up, we wait until they
3165 * are suspended when they try to register in the threads hash.
3166 * This is guaranteed to finish, since the threads which can create new
3167 * threads get suspended after a while.
3168 * FIXME: The finalizer thread can still create new threads.
3170 mono_threads_lock ();
3171 if (threads_starting_up)
3172 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3175 mono_threads_unlock ();
3187 collect_threads (gpointer key, gpointer value, gpointer user_data)
3189 MonoInternalThread *thread = (MonoInternalThread*)value;
3190 struct wait_data *wait = (struct wait_data*)user_data;
3193 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3194 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3198 wait->handles [wait->num] = handle;
3199 wait->threads [wait->num] = thread;
3204 static gboolean thread_dump_requested;
3206 static G_GNUC_UNUSED gboolean
3207 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3209 GString *p = (GString*)data;
3210 MonoMethod *method = NULL;
3212 method = frame->ji->method;
3215 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3216 g_string_append_printf (p, " %s\n", location);
3219 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3225 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3227 GString* text = g_string_new (0);
3229 GError *error = NULL;
3232 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3234 g_string_append_printf (text, "\n\"%s\"", name);
3237 else if (thread->threadpool_thread)
3238 g_string_append (text, "\n\"<threadpool thread>\"");
3240 g_string_append (text, "\n\"<unnamed thread>\"");
3243 /* This no longer works with remote unwinding */
3245 wapi_desc = wapi_current_thread_desc ();
3246 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3251 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3252 mono_thread_info_resume (mono_thread_info_get_tid (info));
3254 fprintf (stdout, "%s", text->str);
3256 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3257 OutputDebugStringA(text->str);
3260 g_string_free (text, TRUE);
3265 dump_thread (gpointer key, gpointer value, gpointer user)
3267 MonoInternalThread *thread = (MonoInternalThread *)value;
3268 MonoThreadInfo *info;
3270 if (thread == mono_thread_internal_current ())
3274 FIXME This still can hang if we stop a thread during malloc.
3275 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3276 that takes a callback and runs it with the target suspended.
3277 We probably should loop a bit around trying to get it to either managed code
3280 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3285 print_thread_dump (thread, info);
3289 mono_threads_perform_thread_dump (void)
3291 if (!thread_dump_requested)
3294 printf ("Full thread dump:\n");
3297 * Make a copy of the hashtable since we can't do anything with
3298 * threads while threads_mutex is held.
3300 mono_threads_lock ();
3301 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3302 mono_threads_unlock ();
3304 thread_dump_requested = FALSE;
3308 * mono_threads_request_thread_dump:
3310 * Ask all threads except the current to print their stacktrace to stdout.
3313 mono_threads_request_thread_dump (void)
3315 struct wait_data wait_data;
3316 struct wait_data *wait = &wait_data;
3319 /*The new thread dump code runs out of the finalizer thread. */
3320 if (mono_thread_info_new_interrupt_enabled ()) {
3321 thread_dump_requested = TRUE;
3322 mono_gc_finalize_notify ();
3327 memset (wait, 0, sizeof (struct wait_data));
3330 * Make a copy of the hashtable since we can't do anything with
3331 * threads while threads_mutex is held.
3333 mono_threads_lock ();
3334 mono_g_hash_table_foreach (threads, collect_threads, wait);
3335 mono_threads_unlock ();
3337 for (i = 0; i < wait->num; ++i) {
3338 MonoInternalThread *thread = wait->threads [i];
3340 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3341 (thread != mono_thread_internal_current ()) &&
3342 !thread->thread_dump_requested) {
3343 thread->thread_dump_requested = TRUE;
3345 signal_thread_state_change (thread);
3348 CloseHandle (wait->handles [i]);
3354 gint allocated; /* +1 so that refs [allocated] == NULL */
3358 typedef struct ref_stack RefStack;
3361 ref_stack_new (gint initial_size)
3365 initial_size = MAX (initial_size, 16) + 1;
3366 rs = g_new0 (RefStack, 1);
3367 rs->refs = g_new0 (gpointer, initial_size);
3368 rs->allocated = initial_size;
3373 ref_stack_destroy (gpointer ptr)
3384 ref_stack_push (RefStack *rs, gpointer ptr)
3386 g_assert (rs != NULL);
3388 if (rs->bottom >= rs->allocated) {
3389 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3390 rs->allocated <<= 1;
3391 rs->refs [rs->allocated] = NULL;
3393 rs->refs [rs->bottom++] = ptr;
3397 ref_stack_pop (RefStack *rs)
3399 if (rs == NULL || rs->bottom == 0)
3403 rs->refs [rs->bottom] = NULL;
3407 ref_stack_find (RefStack *rs, gpointer ptr)
3414 for (refs = rs->refs; refs && *refs; refs++) {
3422 * mono_thread_push_appdomain_ref:
3424 * Register that the current thread may have references to objects in domain
3425 * @domain on its stack. Each call to this function should be paired with a
3426 * call to pop_appdomain_ref.
3429 mono_thread_push_appdomain_ref (MonoDomain *domain)
3431 MonoInternalThread *thread = mono_thread_internal_current ();
3434 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3435 SPIN_LOCK (thread->lock_thread_id);
3436 if (thread->appdomain_refs == NULL)
3437 thread->appdomain_refs = ref_stack_new (16);
3438 ref_stack_push (thread->appdomain_refs, domain);
3439 SPIN_UNLOCK (thread->lock_thread_id);
3444 mono_thread_pop_appdomain_ref (void)
3446 MonoInternalThread *thread = mono_thread_internal_current ();
3449 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3450 SPIN_LOCK (thread->lock_thread_id);
3451 ref_stack_pop (thread->appdomain_refs);
3452 SPIN_UNLOCK (thread->lock_thread_id);
3457 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3460 SPIN_LOCK (thread->lock_thread_id);
3461 res = ref_stack_find (thread->appdomain_refs, domain);
3462 SPIN_UNLOCK (thread->lock_thread_id);
3467 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3469 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3472 typedef struct abort_appdomain_data {
3473 struct wait_data wait;
3475 } abort_appdomain_data;
3478 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3480 MonoInternalThread *thread = (MonoInternalThread*)value;
3481 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3482 MonoDomain *domain = data->domain;
3484 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3485 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3487 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3488 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3491 data->wait.handles [data->wait.num] = handle;
3492 data->wait.threads [data->wait.num] = thread;
3495 /* Just ignore the rest, we can't do anything with
3503 * mono_threads_abort_appdomain_threads:
3505 * Abort threads which has references to the given appdomain.
3508 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3510 #ifdef __native_client__
3514 abort_appdomain_data user_data;
3516 int orig_timeout = timeout;
3519 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3521 start_time = mono_msec_ticks ();
3523 mono_threads_lock ();
3525 user_data.domain = domain;
3526 user_data.wait.num = 0;
3527 /* This shouldn't take any locks */
3528 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3529 mono_threads_unlock ();
3531 if (user_data.wait.num > 0) {
3532 /* Abort the threads outside the threads lock */
3533 for (i = 0; i < user_data.wait.num; ++i)
3534 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3537 * We should wait for the threads either to abort, or to leave the
3538 * domain. We can't do the latter, so we wait with a timeout.
3540 wait_for_tids (&user_data.wait, 100);
3543 /* Update remaining time */
3544 timeout -= mono_msec_ticks () - start_time;
3545 start_time = mono_msec_ticks ();
3547 if (orig_timeout != -1 && timeout < 0)
3550 while (user_data.wait.num > 0);
3552 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3558 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3560 MonoInternalThread *thread = (MonoInternalThread*)value;
3561 MonoDomain *domain = (MonoDomain*)user_data;
3564 /* No locking needed here */
3565 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3567 if (thread->cached_culture_info) {
3568 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3569 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3570 if (obj && obj->vtable->domain == domain)
3571 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3577 * mono_threads_clear_cached_culture:
3579 * Clear the cached_current_culture from all threads if it is in the
3583 mono_threads_clear_cached_culture (MonoDomain *domain)
3585 mono_threads_lock ();
3586 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3587 mono_threads_unlock ();
3591 * mono_thread_get_undeniable_exception:
3593 * Return an exception which needs to be raised when leaving a catch clause.
3594 * This is used for undeniable exception propagation.
3597 mono_thread_get_undeniable_exception (void)
3599 MonoInternalThread *thread = mono_thread_internal_current ();
3601 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3603 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3604 * exception if the thread no longer references a dying appdomain.
3606 thread->abort_exc->trace_ips = NULL;
3607 thread->abort_exc->stack_trace = NULL;
3608 return thread->abort_exc;
3614 #if MONO_SMALL_CONFIG
3615 #define NUM_STATIC_DATA_IDX 4
3616 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3620 #define NUM_STATIC_DATA_IDX 8
3621 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3622 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3626 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3629 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3632 gpointer *static_data = addr;
3633 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3636 if (!static_data [i])
3638 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3639 ptr = static_data [i];
3640 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3641 uintptr_t bmap = static_reference_bitmaps [i][j];
3644 if ((bmap & 1) && *p) {
3655 * mono_alloc_static_data
3657 * Allocate memory blocks for storing threads or context static data
3660 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3662 guint idx = (offset >> 24) - 1;
3665 gpointer* static_data = *static_data_ptr;
3667 static void* tls_desc = NULL;
3668 if (mono_gc_user_markers_supported () && !tls_desc)
3669 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3670 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3671 *static_data_ptr = static_data;
3672 static_data [0] = static_data;
3675 for (i = 1; i <= idx; ++i) {
3676 if (static_data [i])
3678 if (mono_gc_user_markers_supported () && threadlocal)
3679 static_data [i] = g_malloc0 (static_data_size [i]);
3681 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3686 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3689 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3690 if (!static_data [i])
3692 if (mono_gc_user_markers_supported () && threadlocal)
3693 g_free (static_data [i]);
3695 mono_gc_free_fixed (static_data [i]);
3697 mono_gc_free_fixed (static_data);
3701 * mono_init_static_data_info
3703 * Initializes static data counters
3705 static void mono_init_static_data_info (StaticDataInfo *static_data)
3707 static_data->idx = 0;
3708 static_data->offset = 0;
3709 static_data->freelist = NULL;
3713 * mono_alloc_static_data_slot
3715 * Generates an offset for static data. static_data contains the counters
3716 * used to generate it.
3719 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3723 if (!static_data->idx && !static_data->offset) {
3725 * we use the first chunk of the first allocation also as
3726 * an array for the rest of the data
3728 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3730 static_data->offset += align - 1;
3731 static_data->offset &= ~(align - 1);
3732 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3733 static_data->idx ++;
3734 g_assert (size <= static_data_size [static_data->idx]);
3735 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3736 static_data->offset = 0;
3738 offset = static_data->offset | ((static_data->idx + 1) << 24);
3739 static_data->offset += size;
3744 * ensure thread static fields already allocated are valid for thread
3745 * This function is called when a thread is created or on thread attach.
3748 thread_adjust_static_data (MonoInternalThread *thread)
3752 mono_threads_lock ();
3753 if (thread_static_info.offset || thread_static_info.idx > 0) {
3754 /* get the current allocated size */
3755 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3756 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3758 mono_threads_unlock ();
3762 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3764 MonoInternalThread *thread = value;
3765 guint32 offset = GPOINTER_TO_UINT (user);
3767 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3770 static MonoThreadDomainTls*
3771 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3773 MonoThreadDomainTls* prev = NULL;
3774 MonoThreadDomainTls* tmp = static_data->freelist;
3776 if (tmp->size == size) {
3778 prev->next = tmp->next;
3780 static_data->freelist = tmp->next;
3789 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3792 int idx = (offset >> 24) - 1;
3794 if (!static_reference_bitmaps [idx])
3795 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3796 rb = static_reference_bitmaps [idx];
3798 offset /= sizeof (gpointer);
3799 /* offset is now the bitmap offset */
3800 for (i = 0; i < numbits; ++i) {
3801 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3802 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3807 clear_reference_bitmap (guint32 offset, guint32 size)
3809 int idx = (offset >> 24) - 1;
3811 rb = static_reference_bitmaps [idx];
3813 offset /= sizeof (gpointer);
3814 size /= sizeof (gpointer);
3816 /* offset is now the bitmap offset */
3817 for (; offset < size; ++offset)
3818 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3822 * The offset for a special static variable is composed of three parts:
3823 * a bit that indicates the type of static data (0:thread, 1:context),
3824 * an index in the array of chunks of memory for the thread (thread->static_data)
3825 * and an offset in that chunk of mem. This allows allocating less memory in the
3830 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3833 if (static_type == SPECIAL_STATIC_THREAD) {
3834 MonoThreadDomainTls *item;
3835 mono_threads_lock ();
3836 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3837 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3839 offset = item->offset;
3842 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3844 update_tls_reference_bitmap (offset, bitmap, numbits);
3845 /* This can be called during startup */
3846 if (threads != NULL)
3847 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3848 mono_threads_unlock ();
3850 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3851 mono_contexts_lock ();
3852 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3853 mono_contexts_unlock ();
3854 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3860 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3862 /* The high bit means either thread (0) or static (1) data. */
3864 guint32 static_type = (offset & 0x80000000);
3867 offset &= 0x7fffffff;
3868 idx = (offset >> 24) - 1;
3870 if (static_type == 0) {
3871 return get_thread_static_data (thread, offset);
3873 /* Allocate static data block under demand, since we don't have a list
3876 MonoAppContext *context = mono_context_get ();
3877 if (!context->static_data || !context->static_data [idx]) {
3878 mono_contexts_lock ();
3879 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3880 mono_contexts_unlock ();
3882 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3887 mono_get_special_static_data (guint32 offset)
3889 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3898 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3900 MonoInternalThread *thread = value;
3901 TlsOffsetSize *data = user;
3902 int idx = (data->offset >> 24) - 1;
3905 if (!thread->static_data || !thread->static_data [idx])
3907 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3908 mono_gc_bzero (ptr, data->size);
3912 do_free_special_slot (guint32 offset, guint32 size)
3914 guint32 static_type = (offset & 0x80000000);
3915 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3916 if (static_type == 0) {
3918 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3919 data.offset = offset & 0x7fffffff;
3921 clear_reference_bitmap (data.offset, data.size);
3922 if (threads != NULL)
3923 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3924 item->offset = offset;
3927 if (!mono_runtime_is_shutting_down ()) {
3928 item->next = thread_static_info.freelist;
3929 thread_static_info.freelist = item;
3931 /* We could be called during shutdown after mono_thread_cleanup () is called */
3935 /* FIXME: free context static data as well */
3940 do_free_special (gpointer key, gpointer value, gpointer data)
3942 MonoClassField *field = key;
3943 guint32 offset = GPOINTER_TO_UINT (value);
3946 size = mono_type_size (field->type, &align);
3947 do_free_special_slot (offset, size);
3951 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3953 mono_threads_lock ();
3954 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3955 mono_threads_unlock ();
3959 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3961 mono_threads_lock ();
3962 do_free_special_slot (offset, size);
3963 mono_threads_unlock ();
3967 * allocates room in the thread local area for storing an instance of the struct type
3968 * the allocation is kept track of in domain->tlsrec_list.
3971 mono_thread_alloc_tls (MonoReflectionType *type)
3973 MonoDomain *domain = mono_domain_get ();
3975 MonoTlsDataRecord *tlsrec;
3978 gsize default_bitmap [4] = {0};
3979 uint32_t tls_offset;
3983 klass = mono_class_from_mono_type (type->type);
3984 /* TlsDatum is a struct, so we subtract the object header size offset */
3985 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3986 size = mono_type_size (type->type, &align);
3987 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3988 if (bitmap != default_bitmap)
3990 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3991 tlsrec->tls_offset = tls_offset;
3992 tlsrec->size = size;
3993 mono_domain_lock (domain);
3994 tlsrec->next = domain->tlsrec_list;
3995 domain->tlsrec_list = tlsrec;
3996 mono_domain_unlock (domain);
4001 mono_thread_destroy_tls (uint32_t tls_offset)
4003 MonoTlsDataRecord *prev = NULL;
4004 MonoTlsDataRecord *cur;
4006 MonoDomain *domain = mono_domain_get ();
4007 mono_domain_lock (domain);
4008 cur = domain->tlsrec_list;
4010 if (cur->tls_offset == tls_offset) {
4012 prev->next = cur->next;
4014 domain->tlsrec_list = cur->next;
4022 mono_domain_unlock (domain);
4024 mono_special_static_data_free_slot (tls_offset, size);
4028 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4031 mono_thread_destroy_domain_tls (MonoDomain *domain)
4033 while (domain->tlsrec_list)
4034 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4037 static MonoClassField *local_slots = NULL;
4040 /* local tls data to get locals_slot from a thread */
4043 /* index in the locals_slot array */
4048 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4050 LocalSlotID *sid = user_data;
4051 MonoInternalThread *thread = (MonoInternalThread*)value;
4052 MonoArray *slots_array;
4054 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4055 * it is for the right domain, so we need to check if it is allocated an initialized
4056 * for the current thread.
4058 /*g_print ("handling thread %p\n", thread);*/
4059 if (!thread->static_data || !thread->static_data [sid->idx])
4061 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4062 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4064 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4068 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4076 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4078 g_warning ("local_slots field not found in Thread class");
4082 domain = mono_domain_get ();
4083 mono_domain_lock (domain);
4084 if (domain->special_static_fields)
4085 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4086 mono_domain_unlock (domain);
4089 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4090 sid.offset = GPOINTER_TO_UINT (addr);
4091 sid.offset &= 0x7fffffff;
4092 sid.idx = (sid.offset >> 24) - 1;
4093 mono_threads_lock ();
4094 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4095 mono_threads_unlock ();
4097 /* FIXME: clear the slot for MonoAppContexts, too */
4102 static void CALLBACK dummy_apc (ULONG_PTR param)
4106 static guint32 dummy_apc (gpointer param)
4113 * mono_thread_execute_interruption
4115 * Performs the operation that the requested thread state requires (abort,
4118 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4120 ensure_synch_cs_set (thread);
4122 EnterCriticalSection (thread->synch_cs);
4124 /* MonoThread::interruption_requested can only be changed with atomics */
4125 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4126 /* this will consume pending APC calls */
4127 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4128 InterlockedDecrement (&thread_interruption_requested);
4130 /* Clear the interrupted flag of the thread so it can wait again */
4131 wapi_clear_interruption ();
4135 if ((thread->state & ThreadState_AbortRequested) != 0) {
4136 LeaveCriticalSection (thread->synch_cs);
4137 if (thread->abort_exc == NULL) {
4139 * This might be racy, but it has to be called outside the lock
4140 * since it calls managed code.
4142 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4144 return thread->abort_exc;
4146 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4147 self_suspend_internal (thread);
4150 else if ((thread->state & ThreadState_StopRequested) != 0) {
4151 /* FIXME: do this through the JIT? */
4153 LeaveCriticalSection (thread->synch_cs);
4155 mono_thread_exit ();
4157 } else if (thread->pending_exception) {
4160 exc = thread->pending_exception;
4161 thread->pending_exception = NULL;
4163 LeaveCriticalSection (thread->synch_cs);
4165 } else if (thread->thread_interrupt_requested) {
4167 thread->thread_interrupt_requested = FALSE;
4168 LeaveCriticalSection (thread->synch_cs);
4170 return(mono_get_exception_thread_interrupted ());
4173 LeaveCriticalSection (thread->synch_cs);
4179 * mono_thread_request_interruption
4181 * A signal handler can call this method to request the interruption of a
4182 * thread. The result of the interruption will depend on the current state of
4183 * the thread. If the result is an exception that needs to be throw, it is
4184 * provided as return value.
4187 mono_thread_request_interruption (gboolean running_managed)
4189 MonoInternalThread *thread = mono_thread_internal_current ();
4191 /* The thread may already be stopping */
4196 if (thread->interrupt_on_stop &&
4197 thread->state & ThreadState_StopRequested &&
4198 thread->state & ThreadState_Background)
4202 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4204 InterlockedIncrement (&thread_interruption_requested);
4206 if (!running_managed || is_running_protected_wrapper ()) {
4207 /* Can't stop while in unmanaged code. Increase the global interruption
4208 request count. When exiting the unmanaged method the count will be
4209 checked and the thread will be interrupted. */
4212 if (mono_thread_notify_pending_exc_fn && !running_managed)
4213 /* The JIT will notify the thread about the interruption */
4214 /* This shouldn't take any locks */
4215 mono_thread_notify_pending_exc_fn ();
4217 /* this will awake the thread if it is in WaitForSingleObject
4219 /* Our implementation of this function ignores the func argument */
4220 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4224 return mono_thread_execute_interruption (thread);
4228 /*This function should be called by a thread after it has exited all of
4229 * its handle blocks at interruption time.*/
4231 mono_thread_resume_interruption (void)
4233 MonoInternalThread *thread = mono_thread_internal_current ();
4234 gboolean still_aborting;
4236 /* The thread may already be stopping */
4240 ensure_synch_cs_set (thread);
4241 EnterCriticalSection (thread->synch_cs);
4242 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4243 LeaveCriticalSection (thread->synch_cs);
4245 /*This can happen if the protected block called Thread::ResetAbort*/
4246 if (!still_aborting)
4249 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4251 InterlockedIncrement (&thread_interruption_requested);
4254 wapi_self_interrupt ();
4256 return mono_thread_execute_interruption (thread);
4259 gboolean mono_thread_interruption_requested ()
4261 if (thread_interruption_requested) {
4262 MonoInternalThread *thread = mono_thread_internal_current ();
4263 /* The thread may already be stopping */
4265 return (thread->interruption_requested);
4270 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4272 MonoInternalThread *thread = mono_thread_internal_current ();
4274 /* The thread may already be stopping */
4278 mono_debugger_check_interruption ();
4280 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4281 MonoException* exc = mono_thread_execute_interruption (thread);
4282 if (exc) mono_raise_exception (exc);
4287 * Performs the interruption of the current thread, if one has been requested,
4288 * and the thread is not running a protected wrapper.
4290 void mono_thread_interruption_checkpoint ()
4292 mono_thread_interruption_checkpoint_request (FALSE);
4296 * Performs the interruption of the current thread, if one has been requested.
4298 void mono_thread_force_interruption_checkpoint ()
4300 mono_thread_interruption_checkpoint_request (TRUE);
4304 * mono_thread_get_and_clear_pending_exception:
4306 * Return any pending exceptions for the current thread and clear it as a side effect.
4309 mono_thread_get_and_clear_pending_exception (void)
4311 MonoInternalThread *thread = mono_thread_internal_current ();
4313 /* The thread may already be stopping */
4317 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4318 return mono_thread_execute_interruption (thread);
4321 if (thread->pending_exception) {
4322 MonoException *exc = thread->pending_exception;
4324 thread->pending_exception = NULL;
4332 * mono_set_pending_exception:
4334 * Set the pending exception of the current thread to EXC.
4335 * The exception will be thrown when execution returns to managed code.
4338 mono_set_pending_exception (MonoException *exc)
4340 MonoInternalThread *thread = mono_thread_internal_current ();
4342 /* The thread may already be stopping */
4346 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4348 mono_thread_request_interruption (FALSE);
4352 * mono_thread_interruption_request_flag:
4354 * Returns the address of a flag that will be non-zero if an interruption has
4355 * been requested for a thread. The thread to interrupt may not be the current
4356 * thread, so an additional call to mono_thread_interruption_requested() or
4357 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4360 gint32* mono_thread_interruption_request_flag ()
4362 return &thread_interruption_requested;
4366 mono_thread_init_apartment_state (void)
4369 MonoInternalThread* thread = mono_thread_internal_current ();
4371 /* Positive return value indicates success, either
4372 * S_OK if this is first CoInitialize call, or
4373 * S_FALSE if CoInitialize already called, but with same
4374 * threading model. A negative value indicates failure,
4375 * probably due to trying to change the threading model.
4377 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4378 ? COINIT_APARTMENTTHREADED
4379 : COINIT_MULTITHREADED) < 0) {
4380 thread->apartment_state = ThreadApartmentState_Unknown;
4386 mono_thread_cleanup_apartment_state (void)
4389 MonoInternalThread* thread = mono_thread_internal_current ();
4391 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4398 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4400 ensure_synch_cs_set (thread);
4402 EnterCriticalSection (thread->synch_cs);
4403 thread->state |= state;
4404 LeaveCriticalSection (thread->synch_cs);
4408 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4410 ensure_synch_cs_set (thread);
4412 EnterCriticalSection (thread->synch_cs);
4413 thread->state &= ~state;
4414 LeaveCriticalSection (thread->synch_cs);
4418 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4420 gboolean ret = FALSE;
4422 ensure_synch_cs_set (thread);
4424 EnterCriticalSection (thread->synch_cs);
4426 if ((thread->state & test) != 0) {
4430 LeaveCriticalSection (thread->synch_cs);
4435 //static MonoClassField *execution_context_field;
4438 get_execution_context_addr (void)
4440 MonoDomain *domain = mono_domain_get ();
4441 guint32 offset = domain->execution_context_field_offset;
4444 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4447 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4449 mono_domain_lock (domain);
4450 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4451 mono_domain_unlock (domain);
4454 domain->execution_context_field_offset = offset;
4457 return (MonoObject**) mono_get_special_static_data (offset);
4461 mono_thread_get_execution_context (void)
4463 return *get_execution_context_addr ();
4467 mono_thread_set_execution_context (MonoObject *ec)
4469 *get_execution_context_addr () = ec;
4472 static gboolean has_tls_get = FALSE;
4475 mono_runtime_set_has_tls_get (gboolean val)
4481 mono_runtime_has_tls_get (void)
4487 mono_thread_kill (MonoInternalThread *thread, int signal)
4489 #ifdef __native_client__
4490 /* Workaround pthread_kill abort() in NaCl glibc. */
4494 /* Win32 uses QueueUserAPC and callers of this are guarded */
4495 g_assert_not_reached ();
4497 # ifdef PTHREAD_POINTER_ID
4498 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4500 # ifdef PLATFORM_ANDROID
4501 if (thread->android_tid != 0) {
4503 int old_errno = errno;
4505 ret = tkill ((pid_t) thread->android_tid, signal);
4514 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4516 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4523 self_interrupt_thread (void *_unused)
4525 MonoThreadInfo *info = mono_thread_info_current ();
4526 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4527 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4528 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4529 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4533 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4537 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4541 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4543 MonoJitInfo **dest = data;
4549 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4551 MonoJitInfo *ji = NULL;
4554 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4559 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4562 MonoThreadInfo *info = NULL;
4563 gboolean protected_wrapper;
4564 gboolean running_managed;
4566 if (!mono_thread_info_new_interrupt_enabled ()) {
4567 signal_thread_state_change (thread);
4572 FIXME this is insanely broken, it doesn't cause interruption to happen
4573 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4575 if (thread == mono_thread_internal_current ()) {
4576 /* Do it synchronously */
4577 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4579 mono_raise_exception (exc);
4581 wapi_interrupt_thread (thread->handle);
4586 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4587 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4591 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4592 mono_thread_info_resume (mono_thread_info_get_tid (info));
4596 /*someone is already interrupting it*/
4597 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4598 mono_thread_info_resume (mono_thread_info_get_tid (info));
4601 InterlockedIncrement (&thread_interruption_requested);
4603 ji = mono_thread_info_get_last_managed (info);
4604 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4605 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4607 if (!protected_wrapper && running_managed) {
4608 /*We are in managed code*/
4609 /*Set the thread to call */
4610 if (install_async_abort)
4611 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4612 mono_thread_info_resume (mono_thread_info_get_tid (info));
4614 gpointer interrupt_handle;
4616 * This will cause waits to be broken.
4617 * It will also prevent the thread from entering a wait, so if the thread returns
4618 * from the wait before it receives the abort signal, it will just spin in the wait
4619 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4623 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4625 mono_thread_info_resume (mono_thread_info_get_tid (info));
4627 wapi_finish_interrupt_thread (interrupt_handle);
4630 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4634 transition_to_suspended (MonoInternalThread *thread)
4636 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4637 g_assert (0); /*FIXME we should not reach this */
4638 /*Make sure we balance the suspend count.*/
4639 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4641 thread->state &= ~ThreadState_SuspendRequested;
4642 thread->state |= ThreadState_Suspended;
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 (ji->method);
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;