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 * (C) 2001 Ximian, Inc.
14 #define _WIN32_WINNT 0x0500
21 #include <mono/metadata/object.h>
22 #include <mono/metadata/domain-internals.h>
23 #include <mono/metadata/profiler-private.h>
24 #include <mono/metadata/threads.h>
25 #include <mono/metadata/threadpool.h>
26 #include <mono/metadata/threads-types.h>
27 #include <mono/metadata/exception.h>
28 #include <mono/metadata/environment.h>
29 #include <mono/metadata/monitor.h>
30 #include <mono/metadata/gc-internal.h>
31 #include <mono/metadata/marshal.h>
32 #include <mono/io-layer/io-layer.h>
33 #include <mono/metadata/object-internals.h>
34 #include <mono/metadata/mono-debug-debugger.h>
35 #include <mono/utils/mono-compiler.h>
37 #include <mono/os/gc_wrapper.h>
39 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
40 #define THREAD_DEBUG(a)
41 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
42 #define THREAD_WAIT_DEBUG(a)
43 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
44 #define LIBGC_DEBUG(a)
48 guint32 (*func)(void *);
70 /* Number of cached culture objects in the MonoThread->cached_culture_info array
71 * (per-type): we use the first NUM entries for CultureInfo and the last for
72 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
74 #define NUM_CACHED_CULTURES 4
75 #define CULTURES_START_IDX 0
76 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
79 * The "os_handle" field of the WaitHandle class.
81 static MonoClassField *wait_handle_os_handle_field = NULL;
83 /* Controls access to the 'threads' hash table */
84 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
85 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
86 static CRITICAL_SECTION threads_mutex;
88 /* Controls access to context static data */
89 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
90 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
91 static CRITICAL_SECTION contexts_mutex;
93 /* Holds current status of static data heap */
94 static StaticDataInfo thread_static_info;
95 static StaticDataInfo context_static_info;
97 /* The hash of existing threads (key is thread ID) that need joining
100 static MonoGHashTable *threads=NULL;
102 /* The TLS key that holds the MonoObject assigned to each thread */
103 static guint32 current_object_key = -1;
105 #ifdef HAVE_KW_THREAD
106 /* we need to use both the Tls* functions and __thread because
107 * the gc needs to see all the threads
109 static __thread MonoThread * tls_current_object MONO_TLS_FAST;
110 #define SET_CURRENT_OBJECT(x) do { \
111 tls_current_object = x; \
112 TlsSetValue (current_object_key, x); \
114 #define GET_CURRENT_OBJECT() tls_current_object
116 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x);
117 #define GET_CURRENT_OBJECT() (MonoThread*) TlsGetValue (current_object_key);
120 /* function called at thread start */
121 static MonoThreadStartCB mono_thread_start_cb = NULL;
123 /* function called at thread attach */
124 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
126 /* function called at thread cleanup */
127 static MonoThreadCleanupFunc mono_thread_cleanup = NULL;
129 /* The default stack size for each thread */
130 static guint32 default_stacksize = 0;
131 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
133 static void thread_adjust_static_data (MonoThread *thread);
134 static void mono_init_static_data_info (StaticDataInfo *static_data);
135 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
136 static gboolean mono_thread_resume (MonoThread* thread);
137 static void mono_thread_start (MonoThread *thread);
139 /* Spin lock for InterlockedXXX 64 bit functions */
140 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
141 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
142 static CRITICAL_SECTION interlocked_mutex;
144 /* global count of thread interruptions requested */
145 static gint32 thread_interruption_requested = 0;
147 /* Event signaled when a thread changes its background mode */
148 static HANDLE background_change_event;
151 mono_thread_get_tls_key (void)
153 return current_object_key;
157 mono_thread_get_tls_offset (void)
160 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
164 /* handle_store() and handle_remove() manage the array of threads that
165 * still need to be waited for when the main thread exits.
167 static void handle_store(MonoThread *thread)
169 mono_threads_lock ();
171 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->tid));
174 MONO_GC_REGISTER_ROOT (threads);
175 threads=mono_g_hash_table_new(NULL, NULL);
178 /* We don't need to duplicate thread->handle, because it is
179 * only closed when the thread object is finalized by the GC.
181 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->tid),
184 mono_threads_unlock ();
187 static void handle_remove(gsize tid)
189 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
191 mono_threads_lock ();
195 mono_g_hash_table_remove (threads, (gpointer)tid);
197 mono_threads_unlock ();
199 /* Don't close the handle here, wait for the object finalizer
200 * to do it. Otherwise, the following race condition applies:
202 * 1) Thread exits (and handle_remove() closes the handle)
204 * 2) Some other handle is reassigned the same slot
206 * 3) Another thread tries to join the first thread, and
207 * blocks waiting for the reassigned handle to be signalled
208 * (which might never happen). This is possible, because the
209 * thread calling Join() still has a reference to the first
215 * Tell the Mono Debugger about a newly created thread.
216 * mono_debugger_event() is a no-op if we're not running inside the debugger.
218 static void debugger_thread_created (MonoThread *thread)
220 mono_debugger_event (MONO_DEBUGGER_EVENT_THREAD_CREATED,
221 (guint64) (gsize) &thread->end_stack, thread->tid);
225 * Tell the Mono Debugger that a thrad is about to exit.
226 * mono_debugger_event() is a no-op if we're not running inside the debugger.
228 static void debugger_thread_exited (MonoThread *thread)
230 mono_debugger_event (MONO_DEBUGGER_EVENT_THREAD_EXITED,
231 (guint64) (gsize) &thread->end_stack, thread->tid);
234 static void thread_cleanup (MonoThread *thread)
236 g_assert (thread != NULL);
238 mono_release_type_locks (thread);
240 if (!mono_monitor_enter (thread->synch_lock))
243 thread->state |= ThreadState_Stopped;
244 mono_monitor_exit (thread->synch_lock);
246 mono_profiler_thread_end (thread->tid);
247 handle_remove (thread->tid);
249 mono_thread_pop_appdomain_ref ();
251 if (thread->serialized_culture_info)
252 g_free (thread->serialized_culture_info);
254 thread->cached_culture_info = NULL;
256 debugger_thread_exited (thread);
258 if (mono_thread_cleanup)
259 mono_thread_cleanup (thread);
262 static guint32 WINAPI start_wrapper(void *data)
264 struct StartInfo *start_info=(struct StartInfo *)data;
265 guint32 (*start_func)(void *);
268 MonoThread *thread=start_info->obj;
269 MonoObject *start_delegate = start_info->delegate;
271 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
273 /* We can be sure start_info->obj->tid and
274 * start_info->obj->handle have been set, because the thread
275 * was created suspended, and these values were set before the
281 SET_CURRENT_OBJECT (thread);
283 if (!mono_domain_set (start_info->domain, FALSE)) {
284 /* No point in raising an appdomain_unloaded exception here */
285 /* FIXME: Cleanup here */
289 start_func = start_info->func;
290 start_arg = start_info->start_arg;
292 /* This MUST be called before any managed code can be
293 * executed, as it calls the callback function that (for the
294 * jit) sets the lmf marker.
296 mono_thread_new_init (tid, &tid, start_func);
297 thread->stack_ptr = &tid;
299 debugger_thread_created (thread);
301 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
303 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
305 mono_profiler_thread_start (tid);
307 if(thread->start_notify!=NULL) {
308 /* Let the thread that called Start() know we're
311 ReleaseSemaphore (thread->start_notify, 1, NULL);
316 /* Every thread references the appdomain which created it */
317 mono_thread_push_appdomain_ref (mono_domain_get ());
319 thread_adjust_static_data (thread);
321 g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
325 /* start_func is set only for unamanged start functions */
327 start_func (start_arg);
330 g_assert (start_delegate != NULL);
331 args [0] = start_arg;
332 /* we may want to handle the exception here. See comment below on unhandled exceptions */
333 mono_runtime_delegate_invoke (start_delegate, args, NULL);
336 /* If the thread calls ExitThread at all, this remaining code
337 * will not be executed, but the main thread will eventually
338 * call thread_cleanup() on this thread's behalf.
341 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
343 /* Remove the reference to the thread object in the TLS data,
344 * so the thread object can be finalized. This won't be
345 * reached if the thread threw an uncaught exception, so those
346 * thread handles will stay referenced :-( (This is due to
347 * missing support for scanning thread-specific data in the
348 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
351 SET_CURRENT_OBJECT (NULL);
353 thread_cleanup (thread);
358 void mono_thread_new_init (gsize tid, gpointer stack_start, gpointer func)
360 if (mono_thread_start_cb) {
361 mono_thread_start_cb (tid, stack_start, func);
365 void mono_threads_set_default_stacksize (guint32 stacksize)
367 default_stacksize = stacksize;
370 guint32 mono_threads_get_default_stacksize (void)
372 return default_stacksize;
375 void mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
378 HANDLE thread_handle;
379 struct StartInfo *start_info;
382 thread=(MonoThread *)mono_object_new (domain,
383 mono_defaults.thread_class);
385 start_info=g_new0 (struct StartInfo, 1);
386 start_info->func = func;
387 start_info->obj = thread;
388 start_info->domain = domain;
389 start_info->start_arg = arg;
391 /* Create suspended, so we can do some housekeeping before the thread
394 thread_handle = CreateThread(NULL, default_stacksize_for_thread (thread), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
395 CREATE_SUSPENDED, &tid);
396 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
397 if (thread_handle == NULL) {
398 /* The thread couldn't be created, so throw an exception */
399 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
403 thread->handle=thread_handle;
406 MONO_OBJECT_SETREF (thread, synch_lock, mono_object_new (domain, mono_defaults.object_class));
408 handle_store(thread);
410 ResumeThread (thread_handle);
414 mono_thread_attach (MonoDomain *domain)
417 HANDLE thread_handle;
420 if ((thread = mono_thread_current ())) {
421 if (domain != mono_domain_get ())
422 mono_domain_set (domain, TRUE);
423 /* Already attached */
427 if (!mono_gc_register_thread (&domain)) {
428 g_error ("Thread %p 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.", GetCurrentThread ());
431 thread = (MonoThread *)mono_object_new (domain,
432 mono_defaults.thread_class);
434 thread_handle = GetCurrentThread ();
435 g_assert (thread_handle);
437 tid=GetCurrentThreadId ();
439 #ifdef PLATFORM_WIN32
441 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
442 * refer to the thread from other threads for things like aborting.
444 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
445 THREAD_ALL_ACCESS, TRUE, 0);
448 thread->handle=thread_handle;
450 thread->stack_ptr = &tid;
451 MONO_OBJECT_SETREF (thread, synch_lock, mono_object_new (domain, mono_defaults.object_class));
453 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
455 handle_store(thread);
457 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
459 SET_CURRENT_OBJECT (thread);
460 mono_domain_set (domain, TRUE);
462 debugger_thread_created (thread);
464 thread_adjust_static_data (thread);
466 if (mono_thread_attach_cb) {
467 mono_thread_attach_cb (tid, &tid);
474 mono_thread_detach (MonoThread *thread)
476 g_return_if_fail (thread != NULL);
478 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
479 SET_CURRENT_OBJECT (NULL);
481 thread_cleanup (thread);
483 /* Don't need to CloseHandle this thread, even though we took a
484 * reference in mono_thread_attach (), because the GC will do it
485 * when the Thread object is finalised.
492 MonoThread *thread = mono_thread_current ();
494 SET_CURRENT_OBJECT (NULL);
495 thread_cleanup (thread);
497 /* we could add a callback here for embedders to use. */
498 if (thread == mono_thread_get_main ())
499 exit (mono_environment_exitcode_get ());
503 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
506 guint32 (*start_func)(void *);
507 struct StartInfo *start_info;
513 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
515 mono_monitor_enter (this->synch_lock);
517 if ((this->state & ThreadState_Unstarted) == 0) {
518 mono_monitor_exit (this->synch_lock);
519 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
523 if ((this->state & ThreadState_Aborted) != 0) {
524 mono_monitor_exit (this->synch_lock);
529 /* This is freed in start_wrapper */
530 start_info = g_new0 (struct StartInfo, 1);
531 start_info->func = start_func;
532 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
533 start_info->delegate = start;
534 start_info->obj = this;
535 start_info->domain = mono_domain_get ();
537 this->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
538 if(this->start_notify==NULL) {
539 mono_monitor_exit (this->synch_lock);
540 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
544 thread=CreateThread(NULL, default_stacksize_for_thread (this), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
545 CREATE_SUSPENDED, &tid);
547 mono_monitor_exit (this->synch_lock);
548 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
555 /* Don't call handle_store() here, delay it to Start.
556 * We can't join a thread (trying to will just block
557 * forever) until it actually starts running, so don't
558 * store the handle till then.
561 mono_thread_start (this);
563 this->state &= ~ThreadState_Unstarted;
565 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
567 mono_monitor_exit (this->synch_lock);
572 void ves_icall_System_Threading_Thread_Thread_free_internal (MonoThread *this,
577 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
579 CloseHandle (thread);
582 static void mono_thread_start (MonoThread *thread)
586 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
588 /* Only store the handle when the thread is about to be
589 * launched, to avoid the main thread deadlocking while trying
590 * to clean up a thread that will never be signalled.
592 handle_store (thread);
594 ResumeThread (thread->handle);
596 if(thread->start_notify!=NULL) {
597 /* Wait for the thread to set up its TLS data etc, so
598 * theres no potential race condition if someone tries
599 * to look up the data believing the thread has
603 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
605 WaitForSingleObjectEx (thread->start_notify, INFINITE, FALSE);
606 CloseHandle (thread->start_notify);
607 thread->start_notify = NULL;
610 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
613 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
615 MonoThread *thread = mono_thread_current ();
619 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
621 mono_monitor_enter (thread->synch_lock);
622 thread->state |= ThreadState_WaitSleepJoin;
623 mono_monitor_exit (thread->synch_lock);
627 mono_monitor_enter (thread->synch_lock);
628 thread->state &= ~ThreadState_WaitSleepJoin;
629 mono_monitor_exit (thread->synch_lock);
633 ves_icall_System_Threading_Thread_GetDomainID (void)
637 return mono_domain_get()->domain_id;
641 ves_icall_System_Threading_Thread_GetName_internal (MonoThread *this_obj)
644 mono_monitor_enter (this_obj->synch_lock);
649 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
651 mono_monitor_exit (this_obj->synch_lock);
656 ves_icall_System_Threading_Thread_SetName_internal (MonoThread *this_obj, MonoString *name)
658 mono_monitor_enter (this_obj->synch_lock);
660 if (this_obj->name) {
661 mono_monitor_exit (this_obj->synch_lock);
662 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
666 this_obj->name = g_new (gunichar2, mono_string_length (name));
667 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
668 this_obj->name_len = mono_string_length (name);
671 this_obj->name = NULL;
673 mono_monitor_exit (this_obj->synch_lock);
677 lookup_cached_culture (MonoThread *this, MonoDomain *domain, int start_idx)
682 if (this->cached_culture_info) {
683 domain = mono_domain_get ();
684 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
685 res = mono_array_get (this->cached_culture_info, MonoObject*, i);
686 if (res && res->vtable->domain == domain)
695 ves_icall_System_Threading_Thread_GetCachedCurrentCulture (MonoThread *this)
697 return lookup_cached_culture (this, mono_domain_get (), CULTURES_START_IDX);
701 ves_icall_System_Threading_Thread_GetSerializedCurrentCulture (MonoThread *this)
705 mono_monitor_enter (this->synch_lock);
706 if (this->serialized_culture_info) {
707 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_culture_info_len);
708 memcpy (mono_array_addr (res, guint8, 0), this->serialized_culture_info, this->serialized_culture_info_len);
712 mono_monitor_exit (this->synch_lock);
718 cache_culture (MonoThread *this, MonoObject *culture, int start_idx)
721 MonoDomain *domain = mono_domain_get ();
724 int same_domain_slot = -1;
726 mono_monitor_enter (this->synch_lock);
727 if (!this->cached_culture_info)
728 this->cached_culture_info = mono_array_new (mono_object_domain (this), mono_defaults.object_class, NUM_CACHED_CULTURES * 2);
730 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
731 obj = mono_array_get (this->cached_culture_info, MonoObject*, i);
735 /* we continue, because there may be a slot used with the same domain */
739 if (obj->vtable->domain == domain) {
740 same_domain_slot = i;
744 if (same_domain_slot >= 0)
745 mono_array_setref (this->cached_culture_info, same_domain_slot, culture);
746 else if (free_slot >= 0)
747 mono_array_setref (this->cached_culture_info, free_slot, culture);
748 /* we may want to replace an existing entry here, even when no suitable slot is found */
749 mono_monitor_exit (this->synch_lock);
753 ves_icall_System_Threading_Thread_SetCachedCurrentCulture (MonoThread *this, MonoObject *culture)
755 cache_culture (this, culture, CULTURES_START_IDX);
759 ves_icall_System_Threading_Thread_SetSerializedCurrentCulture (MonoThread *this, MonoArray *arr)
761 mono_monitor_enter (this->synch_lock);
762 if (this->serialized_culture_info)
763 g_free (this->serialized_culture_info);
764 this->serialized_culture_info = g_new0 (guint8, mono_array_length (arr));
765 this->serialized_culture_info_len = mono_array_length (arr);
766 memcpy (this->serialized_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
767 mono_monitor_exit (this->synch_lock);
772 ves_icall_System_Threading_Thread_GetCachedCurrentUICulture (MonoThread *this)
774 return lookup_cached_culture (this, mono_domain_get (), UICULTURES_START_IDX);
778 ves_icall_System_Threading_Thread_GetSerializedCurrentUICulture (MonoThread *this)
782 mono_monitor_enter (this->synch_lock);
783 if (this->serialized_ui_culture_info) {
784 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_ui_culture_info_len);
785 memcpy (mono_array_addr (res, guint8, 0), this->serialized_ui_culture_info, this->serialized_ui_culture_info_len);
789 mono_monitor_exit (this->synch_lock);
795 ves_icall_System_Threading_Thread_SetCachedCurrentUICulture (MonoThread *this, MonoObject *culture)
797 cache_culture (this, culture, UICULTURES_START_IDX);
801 ves_icall_System_Threading_Thread_SetSerializedCurrentUICulture (MonoThread *this, MonoArray *arr)
803 mono_monitor_enter (this->synch_lock);
804 if (this->serialized_ui_culture_info)
805 g_free (this->serialized_ui_culture_info);
806 this->serialized_ui_culture_info = g_new0 (guint8, mono_array_length (arr));
807 this->serialized_ui_culture_info_len = mono_array_length (arr);
808 memcpy (this->serialized_ui_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
809 mono_monitor_exit (this->synch_lock);
812 /* the jit may read the compiled code of this function */
814 mono_thread_current (void)
816 THREAD_DEBUG (g_message ("%s: returning %p", __func__, GET_CURRENT_OBJECT ()));
817 return GET_CURRENT_OBJECT ();
820 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoThread *this,
821 int ms, HANDLE thread)
827 mono_monitor_enter (this->synch_lock);
829 if ((this->state & ThreadState_Unstarted) != 0) {
830 mono_monitor_exit (this->synch_lock);
831 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
835 this->state |= ThreadState_WaitSleepJoin;
836 mono_monitor_exit (this->synch_lock);
841 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
843 ret=WaitForSingleObjectEx (thread, ms, TRUE);
845 mono_monitor_enter (this->synch_lock);
846 this->state &= ~ThreadState_WaitSleepJoin;
847 mono_monitor_exit (this->synch_lock);
849 if(ret==WAIT_OBJECT_0) {
850 THREAD_DEBUG (g_message ("%s: join successful", __func__));
855 THREAD_DEBUG (g_message ("%s: join failed", __func__));
860 /* FIXME: exitContext isnt documented */
861 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
867 MonoObject *waitHandle;
869 MonoThread *thread = mono_thread_current ();
873 numhandles = mono_array_length(mono_handles);
874 handles = g_new0(HANDLE, numhandles);
876 if (wait_handle_os_handle_field == 0) {
877 /* Get the field os_handle which will contain the actual handle */
878 klass = mono_class_from_name(mono_defaults.corlib, "System.Threading", "WaitHandle");
879 wait_handle_os_handle_field = mono_class_get_field_from_name(klass, "os_handle");
882 for(i = 0; i < numhandles; i++) {
883 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
884 mono_field_get_value(waitHandle, wait_handle_os_handle_field, &handles[i]);
891 mono_monitor_enter (thread->synch_lock);
892 thread->state |= ThreadState_WaitSleepJoin;
893 mono_monitor_exit (thread->synch_lock);
895 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
897 mono_monitor_enter (thread->synch_lock);
898 thread->state &= ~ThreadState_WaitSleepJoin;
899 mono_monitor_exit (thread->synch_lock);
903 if(ret==WAIT_FAILED) {
904 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
906 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
907 /* Do we want to try again if we get
908 * WAIT_IO_COMPLETION? The documentation for
909 * WaitHandle doesn't give any clues. (We'd have to
910 * fiddle with the timeout if we retry.)
912 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
919 /* FIXME: exitContext isnt documented */
920 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
926 MonoObject *waitHandle;
928 MonoThread *thread = mono_thread_current ();
932 numhandles = mono_array_length(mono_handles);
933 handles = g_new0(HANDLE, numhandles);
935 if (wait_handle_os_handle_field == 0) {
936 /* Get the field os_handle which will contain the actual handle */
937 klass = mono_class_from_name(mono_defaults.corlib, "System.Threading", "WaitHandle");
938 wait_handle_os_handle_field = mono_class_get_field_from_name(klass, "os_handle");
941 for(i = 0; i < numhandles; i++) {
942 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
943 mono_field_get_value(waitHandle, wait_handle_os_handle_field, &handles[i]);
950 mono_monitor_enter (thread->synch_lock);
951 thread->state |= ThreadState_WaitSleepJoin;
952 mono_monitor_exit (thread->synch_lock);
954 ret=WaitForMultipleObjectsEx(numhandles, handles, FALSE, ms, TRUE);
956 mono_monitor_enter (thread->synch_lock);
957 thread->state &= ~ThreadState_WaitSleepJoin;
958 mono_monitor_exit (thread->synch_lock);
962 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
965 * These need to be here. See MSDN dos on WaitForMultipleObjects.
967 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
968 return ret - WAIT_OBJECT_0;
970 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
971 return ret - WAIT_ABANDONED_0;
978 /* FIXME: exitContext isnt documented */
979 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
982 MonoThread *thread = mono_thread_current ();
986 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
992 mono_monitor_enter (thread->synch_lock);
993 thread->state |= ThreadState_WaitSleepJoin;
994 mono_monitor_exit (thread->synch_lock);
996 ret=WaitForSingleObjectEx (handle, ms, TRUE);
998 mono_monitor_enter (thread->synch_lock);
999 thread->state &= ~ThreadState_WaitSleepJoin;
1000 mono_monitor_exit (thread->synch_lock);
1002 if(ret==WAIT_FAILED) {
1003 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1005 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1006 /* Do we want to try again if we get
1007 * WAIT_IO_COMPLETION? The documentation for
1008 * WaitHandle doesn't give any clues. (We'd have to
1009 * fiddle with the timeout if we retry.)
1011 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1018 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1022 MONO_ARCH_SAVE_REGS;
1027 mutex = CreateMutex (NULL, owned, NULL);
1029 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1031 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1039 void ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1040 MONO_ARCH_SAVE_REGS;
1042 ReleaseMutex(handle);
1045 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1051 MONO_ARCH_SAVE_REGS;
1053 *error = ERROR_SUCCESS;
1055 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1057 *error = GetLastError ();
1064 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1068 MONO_ARCH_SAVE_REGS;
1073 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1075 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1076 mono_string_chars (name));
1078 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1086 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1090 MONO_ARCH_SAVE_REGS;
1092 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1097 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1101 MONO_ARCH_SAVE_REGS;
1103 *error = ERROR_SUCCESS;
1105 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1107 *error = GetLastError ();
1113 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1117 MONO_ARCH_SAVE_REGS;
1122 event = CreateEvent (NULL, manual, initial, NULL);
1124 event = CreateEvent (NULL, manual, initial,
1125 mono_string_chars (name));
1127 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1135 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1136 MONO_ARCH_SAVE_REGS;
1138 return (SetEvent(handle));
1141 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1142 MONO_ARCH_SAVE_REGS;
1144 return (ResetEvent(handle));
1148 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1149 MONO_ARCH_SAVE_REGS;
1151 CloseHandle (handle);
1154 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1160 MONO_ARCH_SAVE_REGS;
1162 *error = ERROR_SUCCESS;
1164 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1166 *error = GetLastError ();
1172 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1174 MONO_ARCH_SAVE_REGS;
1176 return InterlockedIncrement (location);
1179 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1183 MONO_ARCH_SAVE_REGS;
1185 mono_interlocked_lock ();
1189 mono_interlocked_unlock ();
1195 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1197 MONO_ARCH_SAVE_REGS;
1199 return InterlockedDecrement(location);
1202 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1206 MONO_ARCH_SAVE_REGS;
1208 mono_interlocked_lock ();
1212 mono_interlocked_unlock ();
1217 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1219 MONO_ARCH_SAVE_REGS;
1221 return InterlockedExchange(location, value);
1224 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1226 MONO_ARCH_SAVE_REGS;
1228 return (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1231 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1233 IntFloatUnion val, ret;
1235 MONO_ARCH_SAVE_REGS;
1238 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1244 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1246 #if SIZEOF_VOID_P == 8
1247 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1252 * According to MSDN, this function is only atomic with regards to the
1253 * other Interlocked functions on 32 bit platforms.
1255 mono_interlocked_lock ();
1258 mono_interlocked_unlock ();
1265 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1267 #if SIZEOF_VOID_P == 8
1268 LongDoubleUnion val, ret;
1271 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1278 * According to MSDN, this function is only atomic with regards to the
1279 * other Interlocked functions on 32 bit platforms.
1281 mono_interlocked_lock ();
1284 mono_interlocked_unlock ();
1290 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1292 MONO_ARCH_SAVE_REGS;
1294 return InterlockedCompareExchange(location, value, comparand);
1297 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1299 MONO_ARCH_SAVE_REGS;
1301 return (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1304 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1306 IntFloatUnion val, ret, cmp;
1308 MONO_ARCH_SAVE_REGS;
1311 cmp.fval = comparand;
1312 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1318 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1320 #if SIZEOF_VOID_P == 8
1321 LongDoubleUnion val, comp, ret;
1324 comp.fval = comparand;
1325 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1331 mono_interlocked_lock ();
1333 if (old == comparand)
1335 mono_interlocked_unlock ();
1342 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1344 #if SIZEOF_VOID_P == 8
1345 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1349 mono_interlocked_lock ();
1351 if (old == comparand)
1353 mono_interlocked_unlock ();
1360 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1362 MONO_ARCH_SAVE_REGS;
1364 return InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1368 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1370 MONO_ARCH_SAVE_REGS;
1372 return InterlockedExchangePointer ((gpointer *)location, value);
1376 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1378 #if SIZEOF_VOID_P == 8
1379 /* Should be implemented as a JIT intrinsic */
1380 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1385 mono_interlocked_lock ();
1387 *location = orig + value;
1388 mono_interlocked_unlock ();
1395 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1397 #if SIZEOF_VOID_P == 8
1398 /* Should be implemented as a JIT intrinsic */
1399 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1404 mono_interlocked_lock ();
1406 *location = orig + value;
1407 mono_interlocked_unlock ();
1414 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1416 #if SIZEOF_VOID_P == 8
1417 /* 64 bit reads are already atomic */
1422 mono_interlocked_lock ();
1424 mono_interlocked_unlock ();
1431 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1433 /* Should be implemented as a JIT intrinsic */
1434 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1438 ves_icall_System_Threading_Thread_ClrState (MonoThread* this, guint32 state)
1440 mono_monitor_enter (this->synch_lock);
1441 this->state &= ~state;
1442 if (state & ThreadState_Background) {
1443 /* If the thread changes the background mode, the main thread has to
1444 * be notified, since it has to rebuild the list of threads to
1447 SetEvent (background_change_event);
1449 mono_monitor_exit (this->synch_lock);
1453 ves_icall_System_Threading_Thread_SetState (MonoThread* this, guint32 state)
1455 mono_monitor_enter (this->synch_lock);
1456 this->state |= state;
1457 if (state & ThreadState_Background) {
1458 /* If the thread changes the background mode, the main thread has to
1459 * be notified, since it has to rebuild the list of threads to
1462 SetEvent (background_change_event);
1464 mono_monitor_exit (this->synch_lock);
1468 ves_icall_System_Threading_Thread_GetState (MonoThread* this)
1471 mono_monitor_enter (this->synch_lock);
1472 state = this->state;
1473 mono_monitor_exit (this->synch_lock);
1478 mono_thread_get_abort_signal (void)
1480 #if defined (__MINGW32__) || defined (_MSC_VER)
1486 static int abort_signum = -1;
1488 if (abort_signum != -1)
1489 return abort_signum;
1490 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1491 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1492 struct sigaction sinfo;
1493 sigaction (i, NULL, &sinfo);
1494 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1499 /* fallback to the old way */
1502 #endif /*defined (__MINGW32__) || defined (_MSC_VER) */
1505 #if defined (__MINGW32__) || defined (_MSC_VER)
1506 static void CALLBACK interruption_request_apc (ULONG_PTR param)
1508 MonoException* exc = mono_thread_request_interruption (FALSE);
1509 if (exc) mono_raise_exception (exc);
1511 #endif /* defined (__MINGW32__) || defined (_MSC_VER) */
1514 * signal_thread_state_change
1516 * Tells the thread that his state has changed and it has to enter the new
1517 * state as soon as possible.
1519 static void signal_thread_state_change (MonoThread *thread)
1521 if (thread == mono_thread_current ()) {
1522 /* Do it synchronously */
1523 MonoException *exc = mono_thread_request_interruption (FALSE);
1525 mono_raise_exception (exc);
1528 #if defined (__MINGW32__) || defined (_MSC_VER)
1529 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
1531 /* fixme: store the state somewhere */
1532 #ifdef PTHREAD_POINTER_ID
1533 pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
1535 pthread_kill (thread->tid, mono_thread_get_abort_signal ());
1537 #endif /* defined (__MINGW32__) || defined (__MSC_VER) */
1541 ves_icall_System_Threading_Thread_Abort (MonoThread *thread, MonoObject *state)
1543 MONO_ARCH_SAVE_REGS;
1545 mono_monitor_enter (thread->synch_lock);
1547 if ((thread->state & ThreadState_AbortRequested) != 0 ||
1548 (thread->state & ThreadState_StopRequested) != 0 ||
1549 (thread->state & ThreadState_Stopped) != 0)
1551 mono_monitor_exit (thread->synch_lock);
1555 if ((thread->state & ThreadState_Unstarted) != 0) {
1556 thread->state |= ThreadState_Aborted;
1557 mono_monitor_exit (thread->synch_lock);
1561 thread->state |= ThreadState_AbortRequested;
1562 MONO_OBJECT_SETREF (thread, abort_state, state);
1563 thread->abort_exc = NULL;
1565 mono_monitor_exit (thread->synch_lock);
1567 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1569 /* Make sure the thread is awake */
1570 mono_thread_resume (thread);
1572 signal_thread_state_change (thread);
1576 ves_icall_System_Threading_Thread_ResetAbort (void)
1578 MonoThread *thread = mono_thread_current ();
1580 MONO_ARCH_SAVE_REGS;
1582 mono_monitor_enter (thread->synch_lock);
1584 thread->state &= ~ThreadState_AbortRequested;
1586 if (!thread->abort_exc) {
1587 const char *msg = "Unable to reset abort because no abort was requested";
1588 mono_monitor_exit (thread->synch_lock);
1589 mono_raise_exception (mono_get_exception_thread_state (msg));
1591 thread->abort_exc = NULL;
1592 thread->abort_state = NULL;
1595 mono_monitor_exit (thread->synch_lock);
1599 mono_thread_suspend (MonoThread *thread)
1601 MONO_ARCH_SAVE_REGS;
1603 mono_monitor_enter (thread->synch_lock);
1605 if ((thread->state & ThreadState_Unstarted) != 0 ||
1606 (thread->state & ThreadState_Aborted) != 0 ||
1607 (thread->state & ThreadState_Stopped) != 0)
1609 mono_monitor_exit (thread->synch_lock);
1613 if ((thread->state & ThreadState_Suspended) != 0 ||
1614 (thread->state & ThreadState_SuspendRequested) != 0 ||
1615 (thread->state & ThreadState_StopRequested) != 0)
1617 mono_monitor_exit (thread->synch_lock);
1621 thread->state |= ThreadState_SuspendRequested;
1622 mono_monitor_exit (thread->synch_lock);
1624 signal_thread_state_change (thread);
1629 ves_icall_System_Threading_Thread_Suspend (MonoThread *thread)
1631 if (!mono_thread_suspend (thread))
1632 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
1636 mono_thread_resume (MonoThread *thread)
1638 MONO_ARCH_SAVE_REGS;
1640 mono_monitor_enter (thread->synch_lock);
1642 if ((thread->state & ThreadState_SuspendRequested) != 0) {
1643 thread->state &= ~ThreadState_SuspendRequested;
1644 mono_monitor_exit (thread->synch_lock);
1648 if ((thread->state & ThreadState_Suspended) == 0 ||
1649 (thread->state & ThreadState_Unstarted) != 0 ||
1650 (thread->state & ThreadState_Aborted) != 0 ||
1651 (thread->state & ThreadState_Stopped) != 0)
1653 mono_monitor_exit (thread->synch_lock);
1657 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
1659 /* Awake the thread */
1660 SetEvent (thread->suspend_event);
1662 mono_monitor_exit (thread->synch_lock);
1664 /* Wait for the thread to awake */
1665 WaitForSingleObject (thread->resume_event, INFINITE);
1666 CloseHandle (thread->resume_event);
1667 thread->resume_event = NULL;
1673 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
1675 if (!mono_thread_resume (thread))
1676 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
1680 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
1685 if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
1686 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
1687 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
1689 *((gboolean*)data) = TRUE;
1696 is_running_protected_wrapper (void)
1698 gboolean found = FALSE;
1699 mono_stack_walk (find_wrapper, &found);
1703 void mono_thread_stop (MonoThread *thread)
1705 mono_monitor_enter (thread->synch_lock);
1707 if ((thread->state & ThreadState_StopRequested) != 0 ||
1708 (thread->state & ThreadState_Stopped) != 0)
1710 mono_monitor_exit (thread->synch_lock);
1714 /* Make sure the thread is awake */
1715 mono_thread_resume (thread);
1717 thread->state |= ThreadState_StopRequested;
1718 thread->state &= ~ThreadState_AbortRequested;
1720 mono_monitor_exit (thread->synch_lock);
1722 signal_thread_state_change (thread);
1726 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
1728 return *((volatile gint8 *) (ptr));
1732 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
1734 return *((volatile gint16 *) (ptr));
1738 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
1740 return *((volatile gint32 *) (ptr));
1744 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
1746 return *((volatile gint64 *) (ptr));
1750 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
1752 return (void *) *((volatile void **) ptr);
1756 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
1758 *((volatile gint8 *) ptr) = value;
1762 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
1764 *((volatile gint16 *) ptr) = value;
1768 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
1770 *((volatile gint32 *) ptr) = value;
1774 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
1776 *((volatile gint64 *) ptr) = value;
1780 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
1782 *((volatile void **) ptr) = value;
1785 void mono_thread_init (MonoThreadStartCB start_cb,
1786 MonoThreadAttachCB attach_cb)
1788 InitializeCriticalSection(&threads_mutex);
1789 InitializeCriticalSection(&interlocked_mutex);
1790 InitializeCriticalSection(&contexts_mutex);
1791 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
1793 mono_init_static_data_info (&thread_static_info);
1794 mono_init_static_data_info (&context_static_info);
1796 current_object_key=TlsAlloc();
1797 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
1799 mono_thread_start_cb = start_cb;
1800 mono_thread_attach_cb = attach_cb;
1802 /* Get a pseudo handle to the current process. This is just a
1803 * kludge so that wapi can build a process handle if needed.
1804 * As a pseudo handle is returned, we don't need to clean
1807 GetCurrentProcess ();
1811 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
1813 mono_thread_cleanup = func;
1817 static void print_tids (gpointer key, gpointer value, gpointer user)
1819 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
1820 * sizeof(uint) and a cast to uint would overflow
1822 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
1823 * print this as a pointer.
1825 g_message ("Waiting for: %p", key);
1830 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
1831 MonoThread *threads[MAXIMUM_WAIT_OBJECTS];
1835 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
1839 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
1841 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, FALSE);
1843 if(ret==WAIT_FAILED) {
1844 /* See the comment in build_wait_tids() */
1845 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
1849 for(i=0; i<wait->num; i++)
1850 CloseHandle (wait->handles[i]);
1852 if (ret == WAIT_TIMEOUT)
1855 for(i=0; i<wait->num; i++) {
1856 gsize tid = wait->threads[i]->tid;
1858 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
1859 /* This thread must have been killed, because
1860 * it hasn't cleaned itself up. (It's just
1861 * possible that the thread exited before the
1862 * parent thread had a chance to store the
1863 * handle, and now there is another pointer to
1864 * the already-exited thread stored. In this
1865 * case, we'll just get two
1866 * mono_profiler_thread_end() calls for the
1870 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
1871 thread_cleanup (wait->threads[i]);
1876 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
1878 guint32 i, ret, count;
1880 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
1882 /* Add the thread state change event, so it wakes up if a thread changes
1883 * to background mode.
1886 if (count < MAXIMUM_WAIT_OBJECTS) {
1887 wait->handles [count] = background_change_event;
1891 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, FALSE);
1893 if(ret==WAIT_FAILED) {
1894 /* See the comment in build_wait_tids() */
1895 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
1899 for(i=0; i<wait->num; i++)
1900 CloseHandle (wait->handles[i]);
1902 if (ret == WAIT_TIMEOUT)
1905 if (ret < wait->num) {
1906 gsize tid = wait->threads[ret]->tid;
1907 mono_threads_lock ();
1908 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
1909 /* See comment in wait_for_tids about thread cleanup */
1910 mono_threads_unlock ();
1911 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
1912 thread_cleanup (wait->threads [ret]);
1914 mono_threads_unlock ();
1918 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
1920 struct wait_data *wait=(struct wait_data *)user;
1922 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
1924 MonoThread *thread=(MonoThread *)value;
1926 /* Ignore background threads, we abort them later */
1927 mono_monitor_enter (thread->synch_lock);
1928 if (thread->state & ThreadState_Background) {
1929 mono_monitor_exit (thread->synch_lock);
1930 return; /* just leave, ignore */
1932 mono_monitor_exit (thread->synch_lock);
1934 if (mono_gc_is_finalizer_thread (thread))
1937 if (thread == mono_thread_current ())
1940 if (thread == mono_thread_get_main ())
1943 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
1947 wait->handles[wait->num]=handle;
1948 wait->threads[wait->num]=thread;
1951 /* Just ignore the rest, we can't do anything with
1958 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
1960 struct wait_data *wait=(struct wait_data *)user;
1961 gsize self = GetCurrentThreadId ();
1962 MonoThread *thread = (MonoThread *) value;
1965 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
1968 /* The finalizer thread is not a background thread */
1969 if (thread->tid != self && (thread->state & ThreadState_Background) != 0) {
1971 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
1975 if(thread->state & ThreadState_AbortRequested ||
1976 thread->state & ThreadState_Aborted) {
1977 THREAD_DEBUG (g_message ("%s: Thread id %"G_GSIZE_FORMAT" already aborting", __func__, (gsize)thread->tid));
1981 /* printf ("A: %d\n", wait->num); */
1982 wait->handles[wait->num]=thread->handle;
1983 wait->threads[wait->num]=thread;
1986 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
1987 mono_thread_stop (thread);
1991 return (thread->tid != self && !mono_gc_is_finalizer_thread (thread));
1994 void mono_thread_manage (void)
1996 struct wait_data *wait=g_new0 (struct wait_data, 1);
1998 /* join each thread that's still running */
1999 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2001 mono_threads_lock ();
2003 THREAD_DEBUG (g_message("%s: No threads", __func__));
2004 mono_threads_unlock ();
2007 mono_threads_unlock ();
2010 mono_threads_lock ();
2011 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2012 mono_g_hash_table_foreach (threads, print_tids, NULL));
2014 ResetEvent (background_change_event);
2016 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2017 mono_threads_unlock ();
2019 /* Something to wait for */
2020 wait_for_tids_or_state_change (wait, INFINITE);
2022 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2023 } while(wait->num>0);
2025 mono_runtime_set_shutting_down ();
2027 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2028 mono_thread_pool_cleanup ();
2031 * Remove everything but the finalizer thread and self.
2032 * Also abort all the background threads
2035 mono_threads_lock ();
2038 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2040 mono_threads_unlock ();
2042 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2044 /* Something to wait for */
2045 wait_for_tids (wait, INFINITE);
2047 } while (wait->num > 0);
2049 #if !defined(PLATFORM_WIN32) && !defined(RUN_IN_SUBTHREAD)
2050 /* The main thread must abandon any held mutexes (particularly
2051 * important for named mutexes as they are shared across
2052 * processes, see bug 74680.) This will happen when the
2053 * thread exits, but if it's not running in a subthread it
2054 * won't exit in time.
2056 /* Using non-w32 API is a nasty kludge, but I couldn't find
2057 * anything in the documentation that would let me do this
2058 * here yet still be safe to call on windows.
2060 _wapi_thread_abandon_mutexes (GetCurrentThread ());
2064 * give the subthreads a chance to really quit (this is mainly needed
2065 * to get correct user and system times from getrusage/wait/time(1)).
2066 * This could be removed if we avoid pthread_detach() and use pthread_join().
2068 #ifndef PLATFORM_WIN32
2075 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2077 MonoThread *thread=(MonoThread *)value;
2079 if(thread->tid != (gsize)user) {
2080 /*TerminateThread (thread->handle, -1);*/
2084 void mono_thread_abort_all_other_threads (void)
2086 gsize self = GetCurrentThreadId ();
2088 mono_threads_lock ();
2089 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2090 mono_g_hash_table_size (threads));
2091 mono_g_hash_table_foreach (threads, print_tids, NULL));
2093 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2095 mono_threads_unlock ();
2099 collect_threads (gpointer key, gpointer value, gpointer user_data)
2101 MonoThread *thread = (MonoThread*)value;
2102 struct wait_data *wait = (struct wait_data*)user_data;
2105 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2106 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2110 wait->handles [wait->num] = handle;
2111 wait->threads [wait->num] = thread;
2117 * mono_thread_suspend_all_other_threads:
2119 * Suspend all managed threads except the finalizer thread and this thread.
2121 void mono_thread_suspend_all_other_threads (void)
2123 struct wait_data *wait = g_new0 (struct wait_data, 1);
2125 gsize self = GetCurrentThreadId ();
2127 guint32 eventidx = 0;
2130 * Make a copy of the hashtable since we can't do anything with
2131 * threads while threads_mutex is held.
2133 mono_threads_lock ();
2134 mono_g_hash_table_foreach (threads, collect_threads, wait);
2135 mono_threads_unlock ();
2137 events = g_new0 (gpointer, wait->num);
2139 /* Get the suspended events that we'll be waiting for */
2140 for (i = 0; i < wait->num; ++i) {
2141 MonoThread *thread = wait->threads [i];
2143 if ((thread->tid == self) || mono_gc_is_finalizer_thread (thread)) {
2144 //CloseHandle (wait->handles [i]);
2145 wait->threads [i] = NULL; /* ignore this thread in next loop */
2149 mono_monitor_enter (thread->synch_lock);
2151 if ((thread->state & ThreadState_Suspended) != 0 ||
2152 (thread->state & ThreadState_SuspendRequested) != 0 ||
2153 (thread->state & ThreadState_StopRequested) != 0 ||
2154 (thread->state & ThreadState_Stopped) != 0) {
2155 mono_monitor_exit (thread->synch_lock);
2156 CloseHandle (wait->handles [i]);
2157 wait->threads [i] = NULL; /* ignore this thread in next loop */
2161 /* Convert abort requests into suspend requests */
2162 if ((thread->state & ThreadState_AbortRequested) != 0)
2163 thread->state &= ~ThreadState_AbortRequested;
2165 thread->state |= ThreadState_SuspendRequested;
2167 if (thread->suspended_event == NULL)
2168 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2170 events [eventidx++] = thread->suspended_event;
2171 mono_monitor_exit (thread->synch_lock);
2173 /* Signal the thread to suspend */
2174 signal_thread_state_change (thread);
2177 WaitForMultipleObjectsEx (eventidx, events, TRUE, INFINITE, FALSE);
2178 for (i = 0; i < wait->num; ++i) {
2179 MonoThread *thread = wait->threads [i];
2184 mono_monitor_enter (thread->synch_lock);
2185 CloseHandle (thread->suspended_event);
2186 thread->suspended_event = NULL;
2187 mono_monitor_exit (thread->synch_lock);
2195 * mono_threads_request_thread_dump:
2197 * Ask all threads except the current to print their stacktrace to stdout.
2200 mono_threads_request_thread_dump (void)
2202 struct wait_data *wait = g_new0 (struct wait_data, 1);
2206 * Make a copy of the hashtable since we can't do anything with
2207 * threads while threads_mutex is held.
2209 mono_threads_lock ();
2210 mono_g_hash_table_foreach (threads, collect_threads, wait);
2211 mono_threads_unlock ();
2213 for (i = 0; i < wait->num; ++i) {
2214 MonoThread *thread = wait->threads [i];
2216 if (!mono_gc_is_finalizer_thread (thread) && (thread != mono_thread_current ()) && !thread->thread_dump_requested) {
2217 thread->thread_dump_requested = TRUE;
2219 signal_thread_state_change (thread);
2222 CloseHandle (wait->handles [i]);
2227 * mono_thread_push_appdomain_ref:
2229 * Register that the current thread may have references to objects in domain
2230 * @domain on its stack. Each call to this function should be paired with a
2231 * call to pop_appdomain_ref.
2234 mono_thread_push_appdomain_ref (MonoDomain *domain)
2236 MonoThread *thread = mono_thread_current ();
2239 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
2240 mono_threads_lock ();
2241 thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
2242 mono_threads_unlock ();
2247 mono_thread_pop_appdomain_ref (void)
2249 MonoThread *thread = mono_thread_current ();
2252 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
2253 mono_threads_lock ();
2254 /* FIXME: How can the list be empty ? */
2255 if (thread->appdomain_refs)
2256 thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
2257 mono_threads_unlock ();
2262 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
2265 mono_threads_lock ();
2266 res = g_slist_find (thread->appdomain_refs, domain) != NULL;
2267 mono_threads_unlock ();
2271 typedef struct abort_appdomain_data {
2272 struct wait_data wait;
2274 } abort_appdomain_data;
2277 abort_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
2279 MonoThread *thread = (MonoThread*)value;
2280 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
2281 MonoDomain *domain = data->domain;
2283 if (mono_thread_has_appdomain_ref (thread, domain)) {
2284 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2288 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
2290 ves_icall_System_Threading_Thread_Abort (thread, NULL);
2292 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
2293 data->wait.handles [data->wait.num] = handle;
2294 data->wait.threads [data->wait.num] = thread;
2297 /* Just ignore the rest, we can't do anything with
2305 * mono_threads_abort_appdomain_threads:
2307 * Abort threads which has references to the given appdomain.
2310 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
2312 abort_appdomain_data user_data;
2315 /* printf ("ABORT BEGIN.\n"); */
2317 start_time = GetTickCount ();
2319 mono_threads_lock ();
2321 user_data.domain = domain;
2322 user_data.wait.num = 0;
2323 mono_g_hash_table_foreach (threads, abort_appdomain_thread, &user_data);
2324 mono_threads_unlock ();
2326 if (user_data.wait.num > 0)
2328 * We should wait for the threads either to abort, or to leave the
2329 * domain. We can't do the latter, so we wait with a timeout.
2331 wait_for_tids (&user_data.wait, 100);
2333 /* Update remaining time */
2334 timeout -= GetTickCount () - start_time;
2335 start_time = GetTickCount ();
2340 while (user_data.wait.num > 0);
2342 /* printf ("ABORT DONE.\n"); */
2348 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
2350 MonoThread *thread = (MonoThread*)value;
2351 MonoDomain *domain = (MonoDomain*)user_data;
2354 /* No locking needed here */
2355 /* FIXME: why no locking? writes to the cache are protected with synch_lock above */
2357 if (thread->cached_culture_info) {
2358 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
2359 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
2360 if (obj && obj->vtable->domain == domain)
2361 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
2367 * mono_threads_clear_cached_culture:
2369 * Clear the cached_current_culture from all threads if it is in the
2373 mono_threads_clear_cached_culture (MonoDomain *domain)
2375 mono_threads_lock ();
2376 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
2377 mono_threads_unlock ();
2381 * mono_thread_get_pending_exception:
2383 * Return an exception which needs to be raised when leaving a catch clause.
2384 * This is used for undeniable exception propagation.
2387 mono_thread_get_pending_exception (void)
2389 MonoThread *thread = mono_thread_current ();
2391 MONO_ARCH_SAVE_REGS;
2393 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
2395 * FIXME: Clear the abort exception and return an AppDomainUnloaded
2396 * exception if the thread no longer references a dying appdomain.
2398 thread->abort_exc->trace_ips = NULL;
2399 thread->abort_exc->stack_trace = NULL;
2400 return thread->abort_exc;
2406 #define NUM_STATIC_DATA_IDX 8
2407 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
2408 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
2413 * mono_alloc_static_data
2415 * Allocate memory blocks for storing threads or context static data
2418 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset)
2420 guint idx = (offset >> 24) - 1;
2423 gpointer* static_data = *static_data_ptr;
2425 static_data = mono_gc_alloc_fixed (static_data_size [0], NULL);
2426 *static_data_ptr = static_data;
2427 static_data [0] = static_data;
2430 for (i = 1; i <= idx; ++i) {
2431 if (static_data [i])
2433 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
2438 * mono_init_static_data_info
2440 * Initializes static data counters
2442 static void mono_init_static_data_info (StaticDataInfo *static_data)
2444 static_data->idx = 0;
2445 static_data->offset = 0;
2449 * mono_alloc_static_data_slot
2451 * Generates an offset for static data. static_data contains the counters
2452 * used to generate it.
2455 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
2459 if (!static_data->idx && !static_data->offset) {
2461 * we use the first chunk of the first allocation also as
2462 * an array for the rest of the data
2464 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
2466 static_data->offset += align - 1;
2467 static_data->offset &= ~(align - 1);
2468 if (static_data->offset + size >= static_data_size [static_data->idx]) {
2469 static_data->idx ++;
2470 g_assert (size <= static_data_size [static_data->idx]);
2472 * massive unloading and reloading of domains with thread-static
2473 * data may eventually exceed the allocated storage...
2474 * Need to check what the MS runtime does in that case.
2475 * Note that for each appdomain, we need to allocate a separate
2476 * thread data slot for security reasons. We could keep track
2477 * of the slots per-domain and when the domain is unloaded
2478 * out the slots on a sort of free list.
2480 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
2481 static_data->offset = 0;
2483 offset = static_data->offset | ((static_data->idx + 1) << 24);
2484 static_data->offset += size;
2489 * ensure thread static fields already allocated are valid for thread
2490 * This function is called when a thread is created or on thread attach.
2493 thread_adjust_static_data (MonoThread *thread)
2497 mono_threads_lock ();
2498 if (thread_static_info.offset || thread_static_info.idx > 0) {
2499 /* get the current allocated size */
2500 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
2501 mono_alloc_static_data (&(thread->static_data), offset);
2503 mono_threads_unlock ();
2507 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
2509 MonoThread *thread = value;
2510 guint32 offset = GPOINTER_TO_UINT (user);
2512 mono_alloc_static_data (&(thread->static_data), offset);
2516 * The offset for a special static variable is composed of three parts:
2517 * a bit that indicates the type of static data (0:thread, 1:context),
2518 * an index in the array of chunks of memory for the thread (thread->static_data)
2519 * and an offset in that chunk of mem. This allows allocating less memory in the
2524 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align)
2527 if (static_type == SPECIAL_STATIC_THREAD)
2529 mono_threads_lock ();
2530 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
2531 /* This can be called during startup */
2532 if (threads != NULL)
2533 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
2534 mono_threads_unlock ();
2538 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
2539 mono_contexts_lock ();
2540 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
2541 mono_contexts_unlock ();
2542 offset |= 0x80000000; /* Set the high bit to indicate context static data */
2548 mono_get_special_static_data (guint32 offset)
2550 /* The high bit means either thread (0) or static (1) data. */
2552 guint32 static_type = (offset & 0x80000000);
2555 offset &= 0x7fffffff;
2556 idx = (offset >> 24) - 1;
2558 if (static_type == 0)
2560 MonoThread *thread = mono_thread_current ();
2561 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
2565 /* Allocate static data block under demand, since we don't have a list
2568 MonoAppContext *context = mono_context_get ();
2569 if (!context->static_data || !context->static_data [idx]) {
2570 mono_contexts_lock ();
2571 mono_alloc_static_data (&(context->static_data), offset);
2572 mono_contexts_unlock ();
2574 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
2578 static MonoClassField *local_slots = NULL;
2581 /* local tls data to get locals_slot from a thread */
2584 /* index in the locals_slot array */
2589 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
2591 LocalSlotID *sid = user_data;
2592 MonoThread *thread = (MonoThread*)value;
2593 MonoArray *slots_array;
2595 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
2596 * it is for the right domain, so we need to check if it is allocated an initialized
2597 * for the current thread.
2599 /*g_print ("handling thread %p\n", thread);*/
2600 if (!thread->static_data || !thread->static_data [sid->idx])
2602 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
2603 if (!slots_array || sid->slot >= mono_array_length (slots_array))
2605 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
2609 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
2617 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
2619 g_warning ("local_slots field not found in Thread class");
2623 domain = mono_domain_get ();
2624 mono_domain_lock (domain);
2625 if (domain->special_static_fields)
2626 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
2627 mono_domain_unlock (domain);
2630 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
2631 sid.offset = GPOINTER_TO_UINT (addr);
2632 sid.offset &= 0x7fffffff;
2633 sid.idx = (sid.offset >> 24) - 1;
2634 mono_threads_lock ();
2635 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
2636 mono_threads_unlock ();
2638 /* FIXME: clear the slot for MonoAppContexts, too */
2643 static CALLBACK void dummy_apc (ULONG_PTR param)
2647 static guint32 dummy_apc (gpointer param)
2654 * mono_thread_execute_interruption
2656 * Performs the operation that the requested thread state requires (abort,
2659 static MonoException* mono_thread_execute_interruption (MonoThread *thread)
2661 mono_monitor_enter (thread->synch_lock);
2663 if (thread->interruption_requested) {
2664 /* this will consume pending APC calls */
2665 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
2666 InterlockedDecrement (&thread_interruption_requested);
2667 thread->interruption_requested = FALSE;
2670 if ((thread->state & ThreadState_AbortRequested) != 0) {
2671 if (thread->abort_exc == NULL)
2672 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
2673 mono_monitor_exit (thread->synch_lock);
2674 return thread->abort_exc;
2676 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
2677 thread->state &= ~ThreadState_SuspendRequested;
2678 thread->state |= ThreadState_Suspended;
2679 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2680 if (thread->suspended_event)
2681 SetEvent (thread->suspended_event);
2682 mono_monitor_exit (thread->synch_lock);
2684 WaitForSingleObject (thread->suspend_event, INFINITE);
2686 mono_monitor_enter (thread->synch_lock);
2687 CloseHandle (thread->suspend_event);
2688 thread->suspend_event = NULL;
2689 thread->state &= ~ThreadState_Suspended;
2691 /* The thread that requested the resume will have replaced this event
2692 * and will be waiting for it
2694 SetEvent (thread->resume_event);
2695 mono_monitor_exit (thread->synch_lock);
2698 else if ((thread->state & ThreadState_StopRequested) != 0) {
2699 /* FIXME: do this through the JIT? */
2700 mono_monitor_exit (thread->synch_lock);
2701 mono_thread_exit ();
2705 mono_monitor_exit (thread->synch_lock);
2710 * mono_thread_request_interruption
2712 * A signal handler can call this method to request the interruption of a
2713 * thread. The result of the interruption will depend on the current state of
2714 * the thread. If the result is an exception that needs to be throw, it is
2715 * provided as return value.
2717 MonoException* mono_thread_request_interruption (gboolean running_managed)
2719 MonoThread *thread = mono_thread_current ();
2721 /* The thread may already be stopping */
2725 mono_monitor_enter (thread->synch_lock);
2727 if (thread->interruption_requested) {
2728 mono_monitor_exit (thread->synch_lock);
2732 if (!running_managed || is_running_protected_wrapper ()) {
2733 /* Can't stop while in unmanaged code. Increase the global interruption
2734 request count. When exiting the unmanaged method the count will be
2735 checked and the thread will be interrupted. */
2737 InterlockedIncrement (&thread_interruption_requested);
2738 thread->interruption_requested = TRUE;
2739 mono_monitor_exit (thread->synch_lock);
2741 /* this will awake the thread if it is in WaitForSingleObject
2743 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
2747 mono_monitor_exit (thread->synch_lock);
2748 return mono_thread_execute_interruption (thread);
2752 gboolean mono_thread_interruption_requested ()
2754 if (thread_interruption_requested) {
2755 MonoThread *thread = mono_thread_current ();
2756 /* The thread may already be stopping */
2758 return (thread->interruption_requested);
2763 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
2765 MonoThread *thread = mono_thread_current ();
2767 /* The thread may already be stopping */
2771 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
2772 MonoException* exc = mono_thread_execute_interruption (thread);
2773 if (exc) mono_raise_exception (exc);
2778 * Performs the interruption of the current thread, if one has been requested,
2779 * and the thread is not running a protected wrapper.
2781 void mono_thread_interruption_checkpoint ()
2783 mono_thread_interruption_checkpoint_request (FALSE);
2787 * Performs the interruption of the current thread, if one has been requested.
2789 void mono_thread_force_interruption_checkpoint ()
2791 mono_thread_interruption_checkpoint_request (TRUE);
2795 * mono_thread_interruption_request_flag:
2797 * Returns the address of a flag that will be non-zero if an interruption has
2798 * been requested for a thread. The thread to interrupt may not be the current
2799 * thread, so an additional call to mono_thread_interruption_requested() or
2800 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
2803 gint32* mono_thread_interruption_request_flag ()
2805 return &thread_interruption_requested;
2808 #if MONO_DEBUGGER_SUPPORTED
2810 extern void GC_push_all_stack (gpointer b, gpointer t);
2813 debugger_gc_push_stack (gpointer key, gpointer value, gpointer user)
2815 MonoThread *thread = (MonoThread*)value;
2819 * The debugger stops all other threads for us in debugger_gc_stop_world() and
2820 * then sets `thread->end_stack' for each of them.
2823 end_stack = (thread->tid == GetCurrentThreadId ()) ? &key : thread->end_stack;
2825 if (!end_stack || !thread->stack_ptr) {
2826 g_warning (G_STRLOC ": Cannot push stack of thread %Lx", thread->tid);
2830 GC_push_all_stack (end_stack, thread->stack_ptr);
2834 * We're called with the thread lock.
2837 debugger_gc_push_all_stacks (void)
2839 if (threads != NULL)
2840 mono_g_hash_table_foreach (threads, debugger_gc_push_stack, NULL);
2844 debugger_gc_stop_world (void)
2847 * Acquire the thread lock and tell the debugger to stop all other threads.
2849 mono_threads_lock ();
2850 mono_debugger_event (
2851 MONO_DEBUGGER_EVENT_ACQUIRE_GLOBAL_THREAD_LOCK, 0, 0);
2855 debugger_gc_start_world (void)
2858 * Tell the debugger to resume all other threads and release the lock.
2860 mono_debugger_event (
2861 MONO_DEBUGGER_EVENT_RELEASE_GLOBAL_THREAD_LOCK, 0, 0);
2862 mono_threads_unlock ();
2866 debugger_gc_init (void)
2869 static GCThreadFunctions debugger_thread_vtable = {
2872 debugger_gc_stop_world,
2873 debugger_gc_push_all_stacks,
2874 debugger_gc_start_world
2877 static GCThreadFunctions *old_gc_thread_vtable = NULL;
2880 * mono_debugger_init_threads:
2882 * This is used when running inside the Mono Debugger.
2885 mono_debugger_init_threads (void)
2887 old_gc_thread_vtable = gc_thread_vtable;
2888 gc_thread_vtable = &debugger_thread_vtable;
2889 debugger_thread_created (mono_thread_current ());
2893 * mono_debugger_finalize_threads:
2895 * This is used when running inside the Mono Debugger.
2896 * Undo the effects of mono_debugger_init_threads(); this is called
2897 * prior to detaching from a process.
2900 mono_debugger_finalize_threads (void)
2902 gc_thread_vtable = old_gc_thread_vtable;
2905 #else /* WITH_INCLUDED_LIBGC */
2908 mono_debugger_init_threads (void)
2910 g_assert_not_reached ();
2914 mono_debugger_finalize_threads (void)
2916 g_assert_not_reached ();