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)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/mono-threads-coop.h>
41 #include <mono/utils/hazard-pointer.h>
42 #include <mono/utils/mono-tls.h>
43 #include <mono/utils/atomic.h>
44 #include <mono/utils/mono-memory-model.h>
45 #include <mono/utils/mono-threads-coop.h>
46 #include <mono/utils/mono-error-internals.h>
48 #include <mono/metadata/gc-internals.h>
49 #include <mono/metadata/reflection-internals.h>
55 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
56 #define USE_TKILL_ON_ANDROID 1
59 #ifdef PLATFORM_ANDROID
62 #ifdef USE_TKILL_ON_ANDROID
63 extern int tkill (pid_t tid, int signal);
67 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
68 #define THREAD_DEBUG(a)
69 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
70 #define THREAD_WAIT_DEBUG(a)
71 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
72 #define LIBGC_DEBUG(a)
74 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
75 #define SPIN_LOCK(i) do { \
76 if (SPIN_TRYLOCK (i)) \
80 #define SPIN_UNLOCK(i) i = 0
82 #define LOCK_THREAD(thread) lock_thread((thread))
83 #define UNLOCK_THREAD(thread) unlock_thread((thread))
87 guint32 (*func)(void *);
103 typedef struct _StaticDataFreeList StaticDataFreeList;
104 struct _StaticDataFreeList {
105 StaticDataFreeList *next;
113 StaticDataFreeList *freelist;
116 /* Number of cached culture objects in the MonoThread->cached_culture_info array
117 * (per-type): we use the first NUM entries for CultureInfo and the last for
118 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
120 #define NUM_CACHED_CULTURES 4
121 #define CULTURES_START_IDX 0
122 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
124 /* Controls access to the 'threads' hash table */
125 static void mono_threads_lock (void);
126 static void mono_threads_unlock (void);
127 static MonoCoopMutex threads_mutex;
129 /* Controls access to the 'joinable_threads' hash table */
130 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
131 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
132 static mono_mutex_t joinable_threads_mutex;
134 /* Holds current status of static data heap */
135 static StaticDataInfo thread_static_info;
136 static StaticDataInfo context_static_info;
138 /* The hash of existing threads (key is thread ID, value is
139 * MonoInternalThread*) that need joining before exit
141 static MonoGHashTable *threads=NULL;
143 /* List of app context GC handles.
144 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
146 static GHashTable *contexts = NULL;
148 /* Cleanup queue for contexts. */
149 static MonoReferenceQueue *context_queue;
152 * Threads which are starting up and they are not in the 'threads' hash yet.
153 * When handle_store is called for a thread, it will be removed from this hash table.
154 * Protected by mono_threads_lock ().
156 static MonoGHashTable *threads_starting_up = NULL;
158 /* The TLS key that holds the MonoObject assigned to each thread */
159 static MonoNativeTlsKey current_object_key;
162 /* Protected by the threads lock */
163 static GHashTable *joinable_threads;
164 static int joinable_thread_count;
166 #ifdef MONO_HAVE_FAST_TLS
167 /* we need to use both the Tls* functions and __thread because
168 * the gc needs to see all the threads
170 MONO_FAST_TLS_DECLARE(tls_current_object);
171 #define SET_CURRENT_OBJECT(x) do { \
172 MONO_FAST_TLS_SET (tls_current_object, x); \
173 mono_native_tls_set_value (current_object_key, x); \
175 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
177 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
178 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
181 /* function called at thread start */
182 static MonoThreadStartCB mono_thread_start_cb = NULL;
184 /* function called at thread attach */
185 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
187 /* function called at thread cleanup */
188 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
190 /* The default stack size for each thread */
191 static guint32 default_stacksize = 0;
192 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
194 static void thread_adjust_static_data (MonoInternalThread *thread);
195 static void context_adjust_static_data (MonoAppContext *ctx);
196 static void mono_free_static_data (gpointer* static_data);
197 static void mono_init_static_data_info (StaticDataInfo *static_data);
198 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
199 static gboolean mono_thread_resume (MonoInternalThread* thread);
200 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
201 static void self_abort_internal (MonoError *error);
202 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
203 static void self_suspend_internal (void);
205 static MonoException* mono_thread_execute_interruption (void);
206 static void ref_stack_destroy (gpointer rs);
208 /* Spin lock for InterlockedXXX 64 bit functions */
209 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
210 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
211 static mono_mutex_t interlocked_mutex;
213 /* global count of thread interruptions requested */
214 static gint32 thread_interruption_requested = 0;
216 /* Event signaled when a thread changes its background mode */
217 static HANDLE background_change_event;
219 static gboolean shutting_down = FALSE;
221 static gint32 managed_thread_id_counter = 0;
223 /* Class lazy loading functions */
224 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
227 mono_threads_lock (void)
229 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
233 mono_threads_unlock (void)
235 mono_locks_coop_release (&threads_mutex, ThreadsLock);
240 get_next_managed_thread_id (void)
242 return InterlockedIncrement (&managed_thread_id_counter);
246 mono_thread_get_tls_key (void)
248 return current_object_key;
252 mono_thread_get_tls_offset (void)
257 if (current_object_key)
258 offset = current_object_key;
260 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
265 static inline MonoNativeThreadId
266 thread_get_tid (MonoInternalThread *thread)
268 /* We store the tid as a guint64 to keep the object layout constant between platforms */
269 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
272 /* handle_store() and handle_remove() manage the array of threads that
273 * still need to be waited for when the main thread exits.
275 * If handle_store() returns FALSE the thread must not be started
276 * because Mono is shutting down.
278 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
280 mono_threads_lock ();
282 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
284 if (threads_starting_up)
285 mono_g_hash_table_remove (threads_starting_up, thread);
287 if (shutting_down && !force_attach) {
288 mono_threads_unlock ();
293 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
294 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
297 /* We don't need to duplicate thread->handle, because it is
298 * only closed when the thread object is finalized by the GC.
300 g_assert (thread->internal_thread);
301 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
302 thread->internal_thread);
304 mono_threads_unlock ();
309 static gboolean handle_remove(MonoInternalThread *thread)
312 gsize tid = thread->tid;
314 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
316 mono_threads_lock ();
319 /* We have to check whether the thread object for the
320 * tid is still the same in the table because the
321 * thread might have been destroyed and the tid reused
322 * in the meantime, in which case the tid would be in
323 * the table, but with another thread object.
325 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
326 mono_g_hash_table_remove (threads, (gpointer)tid);
335 mono_threads_unlock ();
337 /* Don't close the handle here, wait for the object finalizer
338 * to do it. Otherwise, the following race condition applies:
340 * 1) Thread exits (and handle_remove() closes the handle)
342 * 2) Some other handle is reassigned the same slot
344 * 3) Another thread tries to join the first thread, and
345 * blocks waiting for the reassigned handle to be signalled
346 * (which might never happen). This is possible, because the
347 * thread calling Join() still has a reference to the first
353 static void ensure_synch_cs_set (MonoInternalThread *thread)
355 MonoCoopMutex *synch_cs;
357 if (thread->synch_cs != NULL) {
361 synch_cs = g_new0 (MonoCoopMutex, 1);
362 mono_coop_mutex_init_recursive (synch_cs);
364 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
365 synch_cs, NULL) != NULL) {
366 /* Another thread must have installed this CS */
367 mono_coop_mutex_destroy (synch_cs);
373 lock_thread (MonoInternalThread *thread)
375 if (!thread->synch_cs)
376 ensure_synch_cs_set (thread);
378 g_assert (thread->synch_cs);
380 mono_coop_mutex_lock (thread->synch_cs);
384 unlock_thread (MonoInternalThread *thread)
386 mono_coop_mutex_unlock (thread->synch_cs);
390 * NOTE: this function can be called also for threads different from the current one:
391 * make sure no code called from it will ever assume it is run on the thread that is
392 * getting cleaned up.
394 static void thread_cleanup (MonoInternalThread *thread)
396 g_assert (thread != NULL);
398 if (thread->abort_state_handle) {
399 mono_gchandle_free (thread->abort_state_handle);
400 thread->abort_state_handle = 0;
402 thread->abort_exc = NULL;
403 thread->current_appcontext = NULL;
406 * This is necessary because otherwise we might have
407 * cross-domain references which will not get cleaned up when
408 * the target domain is unloaded.
410 if (thread->cached_culture_info) {
412 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
413 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
417 * thread->synch_cs can be NULL if this was called after
418 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
419 * This can happen only during shutdown.
420 * The shutting_down flag is not always set, so we can't assert on it.
422 if (thread->synch_cs)
423 LOCK_THREAD (thread);
425 thread->state |= ThreadState_Stopped;
426 thread->state &= ~ThreadState_Background;
428 if (thread->synch_cs)
429 UNLOCK_THREAD (thread);
432 An interruption request has leaked to cleanup. Adjust the global counter.
434 This can happen is the abort source thread finds the abortee (this) thread
435 in unmanaged code. If this thread never trips back to managed code or check
436 the local flag it will be left set and positively unbalance the global counter.
438 Leaving the counter unbalanced will cause a performance degradation since all threads
439 will now keep checking their local flags all the time.
441 if (InterlockedExchange (&thread->interruption_requested, 0))
442 InterlockedDecrement (&thread_interruption_requested);
444 /* if the thread is not in the hash it has been removed already */
445 if (!handle_remove (thread)) {
446 if (thread == mono_thread_internal_current ()) {
447 mono_domain_unset ();
448 mono_memory_barrier ();
450 /* This needs to be called even if handle_remove () fails */
451 if (mono_thread_cleanup_fn)
452 mono_thread_cleanup_fn (thread_get_tid (thread));
455 mono_release_type_locks (thread);
457 /* Can happen when we attach the profiler helper thread in order to heapshot. */
458 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
459 mono_profiler_thread_end (thread->tid);
461 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
463 if (thread == mono_thread_internal_current ()) {
465 * This will signal async signal handlers that the thread has exited.
466 * The profiler callback needs this to be set, so it cannot be done earlier.
468 mono_domain_unset ();
469 mono_memory_barrier ();
472 if (thread == mono_thread_internal_current ())
473 mono_thread_pop_appdomain_ref ();
475 thread->cached_culture_info = NULL;
477 mono_free_static_data (thread->static_data);
478 thread->static_data = NULL;
479 ref_stack_destroy (thread->appdomain_refs);
480 thread->appdomain_refs = NULL;
482 if (mono_thread_cleanup_fn)
483 mono_thread_cleanup_fn (thread_get_tid (thread));
485 if (mono_gc_is_moving ()) {
486 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
487 thread->thread_pinning_ref = NULL;
493 * A special static data offset (guint32) consists of 3 parts:
495 * [0] 6-bit index into the array of chunks.
496 * [6] 25-bit offset into the array.
497 * [31] Bit indicating thread or context static.
502 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
513 } SpecialStaticOffset;
515 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
516 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
518 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
519 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
520 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
521 (((SpecialStaticOffset *) &(x))->fields.f)
524 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
526 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
528 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
529 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
531 return ((char *) thread->static_data [idx]) + off;
535 get_context_static_data (MonoAppContext *ctx, guint32 offset)
537 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
539 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
540 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
542 return ((char *) ctx->static_data [idx]) + off;
546 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
548 static MonoClassField *current_thread_field = NULL;
552 if (!current_thread_field) {
553 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
554 g_assert (current_thread_field);
557 mono_class_vtable (domain, mono_defaults.thread_class);
558 mono_domain_lock (domain);
559 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
560 mono_domain_unlock (domain);
563 return (MonoThread **)get_thread_static_data (thread, offset);
567 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
569 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
571 g_assert (current->obj.vtable->domain == domain);
573 g_assert (!*current_thread_ptr);
574 *current_thread_ptr = current;
578 create_thread_object (MonoDomain *domain)
581 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
582 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, &error);
583 /* only possible failure mode is OOM, from which we don't expect to recover. */
584 mono_error_assert_ok (&error);
589 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
593 thread = create_thread_object (domain);
595 MONO_OBJECT_SETREF (thread, internal_thread, internal);
600 static MonoInternalThread*
601 create_internal_thread (void)
604 MonoInternalThread *thread;
607 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
608 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
609 /* only possible failure mode is OOM, from which we don't exect to recover */
610 mono_error_assert_ok (&error);
612 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
613 mono_coop_mutex_init_recursive (thread->synch_cs);
615 thread->apartment_state = ThreadApartmentState_Unknown;
616 thread->managed_id = get_next_managed_thread_id ();
617 if (mono_gc_is_moving ()) {
618 thread->thread_pinning_ref = thread;
619 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
626 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
628 MonoDomain *domain = mono_get_root_domain ();
630 if (!candidate || candidate->obj.vtable->domain != domain) {
631 candidate = new_thread_with_internal (domain, thread);
633 set_current_thread_for_domain (domain, thread, candidate);
634 g_assert (!thread->root_domain_thread);
635 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
639 static guint32 WINAPI start_wrapper_internal(void *data)
642 MonoThreadInfo *info;
643 StartInfo *start_info = (StartInfo *)data;
644 guint32 (*start_func)(void *);
648 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
651 MonoInternalThread *internal = start_info->obj->internal_thread;
652 MonoObject *start_delegate = start_info->delegate;
653 MonoDomain *domain = start_info->obj->obj.vtable->domain;
655 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
657 /* We can be sure start_info->obj->tid and
658 * start_info->obj->handle have been set, because the thread
659 * was created suspended, and these values were set before the
663 info = mono_thread_info_current ();
665 internal->thread_info = info;
666 internal->small_id = info->small_id;
670 SET_CURRENT_OBJECT (internal);
672 /* Every thread references the appdomain which created it */
673 mono_thread_push_appdomain_ref (domain);
675 if (!mono_domain_set (domain, FALSE)) {
676 /* No point in raising an appdomain_unloaded exception here */
677 /* FIXME: Cleanup here */
678 mono_thread_pop_appdomain_ref ();
682 start_func = start_info->func;
683 start_arg = start_info->obj->start_obj;
685 start_arg = start_info->start_arg;
687 /* We have to do this here because mono_thread_new_init()
688 requires that root_domain_thread is set up. */
689 thread_adjust_static_data (internal);
690 init_root_domain_thread (internal, start_info->obj);
692 /* This MUST be called before any managed code can be
693 * executed, as it calls the callback function that (for the
694 * jit) sets the lmf marker.
696 mono_thread_new_init (tid, &tid, start_func);
697 internal->stack_ptr = &tid;
698 if (domain != mono_get_root_domain ())
699 set_current_thread_for_domain (domain, internal, start_info->obj);
701 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
703 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
705 /* On 2.0 profile (and higher), set explicitly since state might have been
707 if (internal->apartment_state == ThreadApartmentState_Unknown)
708 internal->apartment_state = ThreadApartmentState_MTA;
710 mono_thread_init_apartment_state ();
712 if(internal->start_notify!=NULL) {
713 /* Let the thread that called Start() know we're
716 ReleaseSemaphore (internal->start_notify, 1, NULL);
720 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
724 * Call this after calling start_notify, since the profiler callback might want
725 * to lock the thread, and the lock is held by thread_start () which waits for
728 mono_profiler_thread_start (tid);
730 /* if the name was set before starting, we didn't invoke the profiler callback */
731 if (internal->name) {
732 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
733 mono_profiler_thread_name (internal->tid, tname);
734 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
738 /* start_func is set only for unmanaged start functions */
740 start_func (start_arg);
743 g_assert (start_delegate != NULL);
744 args [0] = start_arg;
745 /* we may want to handle the exception here. See comment below on unhandled exceptions */
746 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
747 mono_error_raise_exception (&error); /* FIXME don't raise here */
750 /* If the thread calls ExitThread at all, this remaining code
751 * will not be executed, but the main thread will eventually
752 * call thread_cleanup() on this thread's behalf.
755 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
757 /* Do any cleanup needed for apartment state. This
758 * cannot be done in thread_cleanup since thread_cleanup could be
759 * called for a thread other than the current thread.
760 * mono_thread_cleanup_apartment_state cleans up apartment
761 * for the current thead */
762 mono_thread_cleanup_apartment_state ();
764 thread_cleanup (internal);
768 /* Remove the reference to the thread object in the TLS data,
769 * so the thread object can be finalized. This won't be
770 * reached if the thread threw an uncaught exception, so those
771 * thread handles will stay referenced :-( (This is due to
772 * missing support for scanning thread-specific data in the
773 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
776 SET_CURRENT_OBJECT (NULL);
781 static guint32 WINAPI start_wrapper(void *data)
785 /* Avoid scanning the frames above this frame during a GC */
786 mono_gc_set_stack_end ((void*)&dummy);
788 return start_wrapper_internal (data);
794 * Common thread creation code.
795 * LOCKING: Acquires the threads lock.
798 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
801 HANDLE thread_handle;
802 MonoNativeThreadId tid;
803 guint32 create_flags;
806 * Join joinable threads to prevent running out of threads since the finalizer
807 * thread might be blocked/backlogged.
809 mono_threads_join_threads ();
811 mono_error_init (error);
813 mono_threads_lock ();
816 mono_threads_unlock ();
819 if (threads_starting_up == NULL) {
820 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
821 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
823 mono_g_hash_table_insert (threads_starting_up, thread, thread);
824 mono_threads_unlock ();
826 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
827 if (!internal->start_notify) {
828 mono_threads_lock ();
829 mono_g_hash_table_remove (threads_starting_up, thread);
830 mono_threads_unlock ();
831 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
837 stack_size = default_stacksize_for_thread (internal);
839 /* Create suspended, so we can do some housekeeping before the thread
842 create_flags = CREATE_SUSPENDED;
844 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
845 stack_size, create_flags, &tid);
847 if (thread_handle == NULL) {
848 /* The thread couldn't be created, so set an exception */
849 mono_threads_lock ();
850 mono_g_hash_table_remove (threads_starting_up, thread);
851 mono_threads_unlock ();
853 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
856 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
858 internal->handle = thread_handle;
859 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
861 internal->threadpool_thread = threadpool_thread;
862 if (threadpool_thread)
863 mono_thread_set_state (internal, ThreadState_Background);
865 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
867 /* Only store the handle when the thread is about to be
868 * launched, to avoid the main thread deadlocking while trying
869 * to clean up a thread that will never be signalled.
871 if (!handle_store (thread, FALSE))
874 mono_thread_info_resume (tid);
876 if (internal->start_notify) {
878 * Wait for the thread to set up its TLS data etc, so
879 * theres no potential race condition if someone tries
880 * to look up the data believing the thread has
883 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
886 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
889 CloseHandle (internal->start_notify);
890 internal->start_notify = NULL;
893 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
898 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
900 if (mono_thread_start_cb) {
901 mono_thread_start_cb (tid, stack_start, func);
905 void mono_threads_set_default_stacksize (guint32 stacksize)
907 default_stacksize = stacksize;
910 guint32 mono_threads_get_default_stacksize (void)
912 return default_stacksize;
916 * mono_thread_create_internal:
918 * ARG should not be a GC reference.
921 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
924 MonoInternalThread *internal;
925 StartInfo *start_info;
928 mono_error_init (error);
930 thread = create_thread_object (domain);
932 internal = create_internal_thread ();
934 MONO_OBJECT_SETREF (thread, internal_thread, internal);
936 start_info = g_new0 (StartInfo, 1);
937 start_info->func = (guint32 (*)(void *))func;
938 start_info->obj = thread;
939 start_info->start_arg = arg;
941 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, error);
942 return_val_if_nok (error, NULL);
944 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
945 #ifndef MONO_CROSS_COMPILE
946 if (mono_check_corlib_version () == NULL)
947 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
954 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
957 if (!mono_thread_create_checked (domain, func, arg, &error))
958 mono_error_cleanup (&error);
962 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
964 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
968 mono_thread_attach (MonoDomain *domain)
970 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
976 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
978 MonoThreadInfo *info;
979 MonoInternalThread *thread;
980 MonoThread *current_thread;
981 HANDLE thread_handle;
982 MonoNativeThreadId tid;
984 if ((thread = mono_thread_internal_current ())) {
985 if (domain != mono_domain_get ())
986 mono_domain_set (domain, TRUE);
987 /* Already attached */
988 return mono_thread_current ();
991 if (!mono_gc_register_thread (&domain)) {
992 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.", mono_native_thread_id_get ());
995 thread = create_internal_thread ();
997 thread_handle = mono_thread_info_open_handle ();
998 g_assert (thread_handle);
1000 tid=mono_native_thread_id_get ();
1002 thread->handle = thread_handle;
1003 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
1004 thread->stack_ptr = &tid;
1006 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1008 info = mono_thread_info_current ();
1010 thread->thread_info = info;
1011 thread->small_id = info->small_id;
1013 current_thread = new_thread_with_internal (domain, thread);
1015 if (!handle_store (current_thread, force_attach)) {
1016 /* Mono is shutting down, so just wait for the end */
1018 mono_thread_info_sleep (10000, NULL);
1021 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1023 SET_CURRENT_OBJECT (thread);
1024 mono_domain_set (domain, TRUE);
1026 thread_adjust_static_data (thread);
1028 init_root_domain_thread (thread, current_thread);
1030 if (domain != mono_get_root_domain ())
1031 set_current_thread_for_domain (domain, thread, current_thread);
1034 if (mono_thread_attach_cb) {
1038 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1041 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1043 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1046 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1047 if (!info->tools_thread)
1048 // FIXME: Need a separate callback
1049 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1051 return current_thread;
1055 mono_thread_detach_internal (MonoInternalThread *thread)
1057 g_return_if_fail (thread != NULL);
1059 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1061 thread_cleanup (thread);
1063 SET_CURRENT_OBJECT (NULL);
1064 mono_domain_unset ();
1066 /* Don't need to CloseHandle this thread, even though we took a
1067 * reference in mono_thread_attach (), because the GC will do it
1068 * when the Thread object is finalised.
1073 mono_thread_detach (MonoThread *thread)
1076 mono_thread_detach_internal (thread->internal_thread);
1080 * mono_thread_detach_if_exiting:
1082 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1083 * This should be used at the end of embedding code which calls into managed code, and which
1084 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1087 mono_thread_detach_if_exiting (void)
1089 if (mono_thread_info_is_exiting ()) {
1090 MonoInternalThread *thread;
1092 thread = mono_thread_internal_current ();
1094 mono_thread_detach_internal (thread);
1095 mono_thread_info_detach ();
1103 MonoInternalThread *thread = mono_thread_internal_current ();
1105 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1107 thread_cleanup (thread);
1108 SET_CURRENT_OBJECT (NULL);
1109 mono_domain_unset ();
1111 /* we could add a callback here for embedders to use. */
1112 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1113 exit (mono_environment_exitcode_get ());
1114 mono_thread_info_exit ();
1118 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1120 MonoInternalThread *internal;
1122 internal = create_internal_thread ();
1124 internal->state = ThreadState_Unstarted;
1126 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1130 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1134 StartInfo *start_info;
1135 MonoInternalThread *internal;
1138 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1140 if (!this_obj->internal_thread)
1141 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1142 internal = this_obj->internal_thread;
1144 LOCK_THREAD (internal);
1146 if ((internal->state & ThreadState_Unstarted) == 0) {
1147 UNLOCK_THREAD (internal);
1148 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1152 if ((internal->state & ThreadState_Aborted) != 0) {
1153 UNLOCK_THREAD (internal);
1156 /* This is freed in start_wrapper */
1157 start_info = g_new0 (StartInfo, 1);
1158 start_info->func = NULL;
1159 start_info->start_arg = NULL;
1160 start_info->delegate = start;
1161 start_info->obj = this_obj;
1162 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1164 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1166 mono_error_cleanup (&error);
1167 UNLOCK_THREAD (internal);
1171 internal->state &= ~ThreadState_Unstarted;
1173 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1175 UNLOCK_THREAD (internal);
1176 return internal->handle;
1180 * This is called from the finalizer of the internal thread object.
1183 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1185 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1188 * Since threads keep a reference to their thread object while running, by the time this function is called,
1189 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1190 * when thread_cleanup () can be called after this.
1193 CloseHandle (thread);
1195 if (this_obj->synch_cs) {
1196 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1197 this_obj->synch_cs = NULL;
1198 mono_coop_mutex_destroy (synch_cs);
1202 if (this_obj->name) {
1203 void *name = this_obj->name;
1204 this_obj->name = NULL;
1210 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1213 MonoInternalThread *thread = mono_thread_internal_current ();
1215 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1217 if (mono_thread_current_check_pending_interrupt ())
1221 gboolean alerted = FALSE;
1223 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1225 res = mono_thread_info_sleep (ms, &alerted);
1227 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1230 MonoException* exc = mono_thread_execute_interruption ();
1232 mono_raise_exception (exc);
1244 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1249 ves_icall_System_Threading_Thread_GetDomainID (void)
1251 return mono_domain_get()->domain_id;
1255 ves_icall_System_Threading_Thread_Yield (void)
1257 return mono_thread_info_yield ();
1261 * mono_thread_get_name:
1263 * Return the name of the thread. NAME_LEN is set to the length of the name.
1264 * Return NULL if the thread has no name. The returned memory is owned by the
1268 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1272 LOCK_THREAD (this_obj);
1274 if (!this_obj->name) {
1278 *name_len = this_obj->name_len;
1279 res = g_new (gunichar2, this_obj->name_len);
1280 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1283 UNLOCK_THREAD (this_obj);
1289 * mono_thread_get_name_utf8:
1291 * Return the name of the thread in UTF-8.
1292 * Return NULL if the thread has no name.
1293 * The returned memory is owned by the caller.
1296 mono_thread_get_name_utf8 (MonoThread *thread)
1301 MonoInternalThread *internal = thread->internal_thread;
1302 if (internal == NULL)
1305 LOCK_THREAD (internal);
1307 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1309 UNLOCK_THREAD (internal);
1315 * mono_thread_get_managed_id:
1317 * Return the Thread.ManagedThreadId value of `thread`.
1318 * Returns -1 if `thread` is NULL.
1321 mono_thread_get_managed_id (MonoThread *thread)
1326 MonoInternalThread *internal = thread->internal_thread;
1327 if (internal == NULL)
1330 int32_t id = internal->managed_id;
1336 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1341 mono_error_init (&error);
1343 LOCK_THREAD (this_obj);
1345 if (!this_obj->name)
1348 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1350 UNLOCK_THREAD (this_obj);
1352 if (mono_error_set_pending_exception (&error))
1359 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1361 LOCK_THREAD (this_obj);
1363 mono_error_init (error);
1365 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1366 UNLOCK_THREAD (this_obj);
1368 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1371 if (this_obj->name) {
1372 g_free (this_obj->name);
1373 this_obj->name_len = 0;
1376 this_obj->name = g_new (gunichar2, mono_string_length (name));
1377 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1378 this_obj->name_len = mono_string_length (name);
1381 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1384 this_obj->name = NULL;
1387 UNLOCK_THREAD (this_obj);
1389 if (this_obj->name && this_obj->tid) {
1390 char *tname = mono_string_to_utf8_checked (name, error);
1391 return_if_nok (error);
1392 mono_profiler_thread_name (this_obj->tid, tname);
1393 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1399 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1402 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1403 mono_error_set_pending_exception (&error);
1407 * ves_icall_System_Threading_Thread_GetPriority_internal:
1408 * @param this_obj: The MonoInternalThread on which to operate.
1410 * Gets the priority of the given thread.
1411 * @return: The priority of the given thread.
1414 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1417 MonoInternalThread *internal = this_obj->internal_thread;
1419 LOCK_THREAD (internal);
1420 priority = GetThreadPriority (internal->handle) + 2;
1421 UNLOCK_THREAD (internal);
1426 * ves_icall_System_Threading_Thread_SetPriority_internal:
1427 * @param this_obj: The MonoInternalThread on which to operate.
1428 * @param priority: The priority to set.
1430 * Sets the priority of the given thread.
1433 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1435 MonoInternalThread *internal = this_obj->internal_thread;
1437 LOCK_THREAD (internal);
1438 SetThreadPriority (internal->handle, priority - 2);
1439 UNLOCK_THREAD (internal);
1442 /* If the array is already in the requested domain, we just return it,
1443 otherwise we return a copy in that domain. */
1445 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1449 mono_error_init (error);
1453 if (mono_object_domain (arr) == domain)
1456 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1457 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1462 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1465 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1466 mono_error_set_pending_exception (&error);
1471 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1474 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1475 mono_error_set_pending_exception (&error);
1480 mono_thread_current (void)
1482 MonoDomain *domain = mono_domain_get ();
1483 MonoInternalThread *internal = mono_thread_internal_current ();
1484 MonoThread **current_thread_ptr;
1486 g_assert (internal);
1487 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1489 if (!*current_thread_ptr) {
1490 g_assert (domain != mono_get_root_domain ());
1491 *current_thread_ptr = new_thread_with_internal (domain, internal);
1493 return *current_thread_ptr;
1496 /* Return the thread object belonging to INTERNAL in the current domain */
1498 mono_thread_current_for_thread (MonoInternalThread *internal)
1500 MonoDomain *domain = mono_domain_get ();
1501 MonoThread **current_thread_ptr;
1503 g_assert (internal);
1504 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1506 if (!*current_thread_ptr) {
1507 g_assert (domain != mono_get_root_domain ());
1508 *current_thread_ptr = new_thread_with_internal (domain, internal);
1510 return *current_thread_ptr;
1514 mono_thread_internal_current (void)
1516 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1517 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1522 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1524 MonoInternalThread *thread = this_obj->internal_thread;
1525 HANDLE handle = thread->handle;
1526 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1529 if (mono_thread_current_check_pending_interrupt ())
1532 LOCK_THREAD (thread);
1534 if ((thread->state & ThreadState_Unstarted) != 0) {
1535 UNLOCK_THREAD (thread);
1537 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1541 UNLOCK_THREAD (thread);
1546 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1548 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1551 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1554 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1556 if(ret==WAIT_OBJECT_0) {
1557 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1562 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1567 #define MANAGED_WAIT_FAILED 0x7fffffff
1570 map_native_wait_result_to_managed (gint32 val)
1572 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1573 return val == WAIT_FAILED ? MANAGED_WAIT_FAILED : val;
1577 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1585 mono_error_init (error);
1587 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1590 if (numhandles != 1)
1591 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE);
1593 ret = WaitForSingleObjectEx (handles [0], ms, TRUE);
1596 if (ret != WAIT_IO_COMPLETION)
1599 exc = mono_thread_execute_interruption ();
1601 mono_error_set_exception_instance (error, exc);
1608 /* Re-calculate ms according to the time passed */
1609 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1610 if (diff_ms >= ms) {
1614 wait = ms - diff_ms;
1620 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1627 MonoObject *waitHandle;
1628 MonoInternalThread *thread = mono_thread_internal_current ();
1630 /* Do this WaitSleepJoin check before creating objects */
1631 if (mono_thread_current_check_pending_interrupt ())
1632 return map_native_wait_result_to_managed (WAIT_FAILED);
1634 /* We fail in managed if the array has more than 64 elements */
1635 numhandles = (guint32)mono_array_length(mono_handles);
1636 handles = g_new0(HANDLE, numhandles);
1638 for(i = 0; i < numhandles; i++) {
1639 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1640 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1647 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1649 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1651 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1655 mono_error_set_pending_exception (&error);
1657 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1658 return map_native_wait_result_to_managed (ret);
1661 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1664 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1665 uintptr_t numhandles;
1668 MonoObject *waitHandle;
1669 MonoInternalThread *thread = mono_thread_internal_current ();
1671 /* Do this WaitSleepJoin check before creating objects */
1672 if (mono_thread_current_check_pending_interrupt ())
1673 return map_native_wait_result_to_managed (WAIT_FAILED);
1675 numhandles = mono_array_length(mono_handles);
1676 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1677 return map_native_wait_result_to_managed (WAIT_FAILED);
1679 for(i = 0; i < numhandles; i++) {
1680 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1681 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1688 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1690 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1692 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1694 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1696 mono_error_set_pending_exception (&error);
1698 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1700 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1701 return map_native_wait_result_to_managed (ret - WAIT_OBJECT_0);
1703 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1704 return map_native_wait_result_to_managed (ret - WAIT_ABANDONED_0);
1707 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1708 return map_native_wait_result_to_managed (ret);
1712 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1716 MonoInternalThread *thread = mono_thread_internal_current ();
1718 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1724 if (mono_thread_current_check_pending_interrupt ())
1725 return map_native_wait_result_to_managed (WAIT_FAILED);
1727 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1729 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1731 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1733 mono_error_set_pending_exception (&error);
1734 return map_native_wait_result_to_managed (ret);
1738 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1741 MonoInternalThread *thread = mono_thread_internal_current ();
1746 if (mono_thread_current_check_pending_interrupt ())
1747 return map_native_wait_result_to_managed (WAIT_FAILED);
1749 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1752 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1755 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1757 return map_native_wait_result_to_managed (ret);
1760 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1767 mutex = CreateMutex (NULL, owned, NULL);
1769 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1771 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1779 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1780 return(ReleaseMutex (handle));
1783 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1789 *error = ERROR_SUCCESS;
1791 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1793 *error = GetLastError ();
1800 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1807 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1809 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1810 mono_string_chars (name));
1812 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1820 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1824 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1829 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1833 *error = ERROR_SUCCESS;
1835 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1837 *error = GetLastError ();
1843 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1850 event = CreateEvent (NULL, manual, initial, NULL);
1852 event = CreateEvent (NULL, manual, initial,
1853 mono_string_chars (name));
1855 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1863 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1864 return (SetEvent(handle));
1867 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1868 return (ResetEvent(handle));
1872 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1873 CloseHandle (handle);
1876 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1882 *error = ERROR_SUCCESS;
1884 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1886 *error = GetLastError ();
1892 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1894 return InterlockedIncrement (location);
1897 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1899 #if SIZEOF_VOID_P == 4
1900 if (G_UNLIKELY ((size_t)location & 0x7)) {
1902 mono_interlocked_lock ();
1905 mono_interlocked_unlock ();
1909 return InterlockedIncrement64 (location);
1912 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1914 return InterlockedDecrement(location);
1917 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1919 #if SIZEOF_VOID_P == 4
1920 if (G_UNLIKELY ((size_t)location & 0x7)) {
1922 mono_interlocked_lock ();
1925 mono_interlocked_unlock ();
1929 return InterlockedDecrement64 (location);
1932 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1934 return InterlockedExchange(location, value);
1937 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1940 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1941 mono_gc_wbarrier_generic_nostore (location);
1945 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1947 return InterlockedExchangePointer(location, value);
1950 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1952 IntFloatUnion val, ret;
1955 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1961 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1963 #if SIZEOF_VOID_P == 4
1964 if (G_UNLIKELY ((size_t)location & 0x7)) {
1966 mono_interlocked_lock ();
1969 mono_interlocked_unlock ();
1973 return InterlockedExchange64 (location, value);
1977 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1979 LongDoubleUnion val, ret;
1982 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1987 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1989 return InterlockedCompareExchange(location, value, comparand);
1992 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1994 gint32 r = InterlockedCompareExchange(location, value, comparand);
1995 *success = r == comparand;
1999 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2002 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2003 mono_gc_wbarrier_generic_nostore (location);
2007 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2009 return InterlockedCompareExchangePointer(location, value, comparand);
2012 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2014 IntFloatUnion val, ret, cmp;
2017 cmp.fval = comparand;
2018 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2024 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2026 #if SIZEOF_VOID_P == 8
2027 LongDoubleUnion val, comp, ret;
2030 comp.fval = comparand;
2031 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2037 mono_interlocked_lock ();
2039 if (old == comparand)
2041 mono_interlocked_unlock ();
2048 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2050 #if SIZEOF_VOID_P == 4
2051 if (G_UNLIKELY ((size_t)location & 0x7)) {
2053 mono_interlocked_lock ();
2055 if (old == comparand)
2057 mono_interlocked_unlock ();
2061 return InterlockedCompareExchange64 (location, value, comparand);
2065 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2068 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2069 mono_gc_wbarrier_generic_nostore (location);
2074 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2077 MONO_CHECK_NULL (location, NULL);
2078 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2079 mono_gc_wbarrier_generic_nostore (location);
2084 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2086 return InterlockedAdd (location, value);
2090 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2092 #if SIZEOF_VOID_P == 4
2093 if (G_UNLIKELY ((size_t)location & 0x7)) {
2095 mono_interlocked_lock ();
2098 mono_interlocked_unlock ();
2102 return InterlockedAdd64 (location, value);
2106 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2108 #if SIZEOF_VOID_P == 4
2109 if (G_UNLIKELY ((size_t)location & 0x7)) {
2111 mono_interlocked_lock ();
2113 mono_interlocked_unlock ();
2117 return InterlockedRead64 (location);
2121 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2123 mono_memory_barrier ();
2127 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2129 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2131 if (state & ThreadState_Background) {
2132 /* If the thread changes the background mode, the main thread has to
2133 * be notified, since it has to rebuild the list of threads to
2136 SetEvent (background_change_event);
2141 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2143 mono_thread_set_state (this_obj, (MonoThreadState)state);
2145 if (state & ThreadState_Background) {
2146 /* If the thread changes the background mode, the main thread has to
2147 * be notified, since it has to rebuild the list of threads to
2150 SetEvent (background_change_event);
2155 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2159 LOCK_THREAD (this_obj);
2161 state = this_obj->state;
2163 UNLOCK_THREAD (this_obj);
2168 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2170 MonoInternalThread *current;
2172 MonoInternalThread *thread = this_obj->internal_thread;
2174 LOCK_THREAD (thread);
2176 current = mono_thread_internal_current ();
2178 thread->thread_interrupt_requested = TRUE;
2179 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2181 UNLOCK_THREAD (thread);
2184 async_abort_internal (thread, FALSE);
2189 * mono_thread_current_check_pending_interrupt:
2191 * Checks if there's a interruption request and set the pending exception if so.
2193 * @returns true if a pending exception was set
2196 mono_thread_current_check_pending_interrupt (void)
2198 MonoInternalThread *thread = mono_thread_internal_current ();
2199 gboolean throw_ = FALSE;
2201 LOCK_THREAD (thread);
2203 if (thread->thread_interrupt_requested) {
2205 thread->thread_interrupt_requested = FALSE;
2208 UNLOCK_THREAD (thread);
2211 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2216 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2218 LOCK_THREAD (thread);
2220 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2221 (thread->state & ThreadState_StopRequested) != 0 ||
2222 (thread->state & ThreadState_Stopped) != 0)
2224 UNLOCK_THREAD (thread);
2228 if ((thread->state & ThreadState_Unstarted) != 0) {
2229 thread->state |= ThreadState_Aborted;
2230 UNLOCK_THREAD (thread);
2234 thread->state |= ThreadState_AbortRequested;
2235 if (thread->abort_state_handle)
2236 mono_gchandle_free (thread->abort_state_handle);
2238 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2239 g_assert (thread->abort_state_handle);
2241 thread->abort_state_handle = 0;
2243 thread->abort_exc = NULL;
2245 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), thread, (gsize)thread->tid));
2247 /* During shutdown, we can't wait for other threads */
2249 /* Make sure the thread is awake */
2250 mono_thread_resume (thread);
2252 UNLOCK_THREAD (thread);
2257 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2259 if (!request_thread_abort (thread, state))
2262 if (thread == mono_thread_internal_current ()) {
2264 self_abort_internal (&error);
2265 mono_error_set_pending_exception (&error);
2267 async_abort_internal (thread, TRUE);
2272 * mono_thread_internal_abort:
2274 * Request thread @thread to be aborted.
2276 * @thread MUST NOT be the current thread.
2279 mono_thread_internal_abort (MonoInternalThread *thread)
2281 g_assert (thread != mono_thread_internal_current ());
2283 if (!request_thread_abort (thread, NULL))
2285 async_abort_internal (thread, TRUE);
2289 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2291 MonoInternalThread *thread = mono_thread_internal_current ();
2292 gboolean was_aborting;
2294 LOCK_THREAD (thread);
2295 was_aborting = thread->state & ThreadState_AbortRequested;
2296 thread->state &= ~ThreadState_AbortRequested;
2297 UNLOCK_THREAD (thread);
2299 if (!was_aborting) {
2300 const char *msg = "Unable to reset abort because no abort was requested";
2301 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2304 thread->abort_exc = NULL;
2305 if (thread->abort_state_handle) {
2306 mono_gchandle_free (thread->abort_state_handle);
2307 /* This is actually not necessary - the handle
2308 only counts if the exception is set */
2309 thread->abort_state_handle = 0;
2314 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2316 LOCK_THREAD (thread);
2318 thread->state &= ~ThreadState_AbortRequested;
2320 if (thread->abort_exc) {
2321 thread->abort_exc = NULL;
2322 if (thread->abort_state_handle) {
2323 mono_gchandle_free (thread->abort_state_handle);
2324 /* This is actually not necessary - the handle
2325 only counts if the exception is set */
2326 thread->abort_state_handle = 0;
2330 UNLOCK_THREAD (thread);
2334 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2337 MonoInternalThread *thread = this_obj->internal_thread;
2338 MonoObject *state, *deserialized = NULL;
2341 if (!thread->abort_state_handle)
2344 state = mono_gchandle_get_target (thread->abort_state_handle);
2347 domain = mono_domain_get ();
2348 if (mono_object_domain (state) == domain)
2351 deserialized = mono_object_xdomain_representation (state, domain, &error);
2353 if (!deserialized) {
2354 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2355 if (!is_ok (&error)) {
2356 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2357 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2359 mono_set_pending_exception (invalid_op_exc);
2363 return deserialized;
2367 mono_thread_suspend (MonoInternalThread *thread)
2369 LOCK_THREAD (thread);
2371 if ((thread->state & ThreadState_Unstarted) != 0 ||
2372 (thread->state & ThreadState_Aborted) != 0 ||
2373 (thread->state & ThreadState_Stopped) != 0)
2375 UNLOCK_THREAD (thread);
2379 if ((thread->state & ThreadState_Suspended) != 0 ||
2380 (thread->state & ThreadState_SuspendRequested) != 0 ||
2381 (thread->state & ThreadState_StopRequested) != 0)
2383 UNLOCK_THREAD (thread);
2387 thread->state |= ThreadState_SuspendRequested;
2389 if (thread == mono_thread_internal_current ()) {
2390 /* calls UNLOCK_THREAD (thread) */
2391 self_suspend_internal ();
2393 /* calls UNLOCK_THREAD (thread) */
2394 async_suspend_internal (thread, FALSE);
2401 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2403 if (!mono_thread_suspend (this_obj->internal_thread)) {
2404 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2409 /* LOCKING: LOCK_THREAD(thread) must be held */
2411 mono_thread_resume (MonoInternalThread *thread)
2413 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2414 thread->state &= ~ThreadState_SuspendRequested;
2418 if ((thread->state & ThreadState_Suspended) == 0 ||
2419 (thread->state & ThreadState_Unstarted) != 0 ||
2420 (thread->state & ThreadState_Aborted) != 0 ||
2421 (thread->state & ThreadState_Stopped) != 0)
2426 UNLOCK_THREAD (thread);
2428 /* Awake the thread */
2429 if (!mono_thread_info_resume (thread_get_tid (thread)))
2432 LOCK_THREAD (thread);
2434 thread->state &= ~ThreadState_Suspended;
2440 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2442 if (!thread->internal_thread) {
2443 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2445 LOCK_THREAD (thread->internal_thread);
2446 if (!mono_thread_resume (thread->internal_thread))
2447 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2448 UNLOCK_THREAD (thread->internal_thread);
2453 mono_threads_is_critical_method (MonoMethod *method)
2455 switch (method->wrapper_type) {
2456 case MONO_WRAPPER_RUNTIME_INVOKE:
2457 case MONO_WRAPPER_XDOMAIN_INVOKE:
2458 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2465 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2470 if (mono_threads_is_critical_method (m)) {
2471 *((gboolean*)data) = TRUE;
2478 is_running_protected_wrapper (void)
2480 gboolean found = FALSE;
2481 mono_stack_walk (find_wrapper, &found);
2486 request_thread_stop (MonoInternalThread *thread)
2488 LOCK_THREAD (thread);
2490 if ((thread->state & ThreadState_StopRequested) != 0 ||
2491 (thread->state & ThreadState_Stopped) != 0)
2493 UNLOCK_THREAD (thread);
2497 /* Make sure the thread is awake */
2498 mono_thread_resume (thread);
2500 thread->state |= ThreadState_StopRequested;
2501 thread->state &= ~ThreadState_AbortRequested;
2503 UNLOCK_THREAD (thread);
2508 * mono_thread_internal_stop:
2510 * Request thread @thread to stop.
2512 * @thread MUST NOT be the current thread.
2515 mono_thread_internal_stop (MonoInternalThread *thread)
2517 g_assert (thread != mono_thread_internal_current ());
2519 if (!request_thread_stop (thread))
2522 async_abort_internal (thread, TRUE);
2525 void mono_thread_stop (MonoThread *thread)
2527 MonoInternalThread *internal = thread->internal_thread;
2529 if (!request_thread_stop (internal))
2532 if (internal == mono_thread_internal_current ()) {
2534 self_abort_internal (&error);
2536 This function is part of the embeding API and has no way to return the exception
2537 to be thrown. So what we do is keep the old behavior and raise the exception.
2539 mono_error_raise_exception (&error); /* OK to throw, see note */
2541 async_abort_internal (internal, TRUE);
2546 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2548 gint8 tmp = *(volatile gint8 *)ptr;
2549 mono_memory_barrier ();
2554 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2556 gint16 tmp = *(volatile gint16 *)ptr;
2557 mono_memory_barrier ();
2562 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2564 gint32 tmp = *(volatile gint32 *)ptr;
2565 mono_memory_barrier ();
2570 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2572 gint64 tmp = *(volatile gint64 *)ptr;
2573 mono_memory_barrier ();
2578 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2580 volatile void *tmp = *(volatile void **)ptr;
2581 mono_memory_barrier ();
2582 return (void *) tmp;
2586 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2588 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2589 mono_memory_barrier ();
2590 return (MonoObject *) tmp;
2594 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2596 double tmp = *(volatile double *)ptr;
2597 mono_memory_barrier ();
2602 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2604 float tmp = *(volatile float *)ptr;
2605 mono_memory_barrier ();
2610 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2612 return InterlockedRead8 ((volatile gint8 *)ptr);
2616 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2618 return InterlockedRead16 ((volatile gint16 *)ptr);
2622 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2624 return InterlockedRead ((volatile gint32 *)ptr);
2628 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2630 #if SIZEOF_VOID_P == 4
2631 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2633 mono_interlocked_lock ();
2634 val = *(gint64*)ptr;
2635 mono_interlocked_unlock ();
2639 return InterlockedRead64 ((volatile gint64 *)ptr);
2643 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2645 return InterlockedReadPointer ((volatile gpointer *)ptr);
2649 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2653 #if SIZEOF_VOID_P == 4
2654 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2656 mono_interlocked_lock ();
2657 val = *(double*)ptr;
2658 mono_interlocked_unlock ();
2663 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2669 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2673 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2679 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2681 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2685 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2687 mono_memory_barrier ();
2688 *(volatile gint8 *)ptr = value;
2692 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2694 mono_memory_barrier ();
2695 *(volatile gint16 *)ptr = value;
2699 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2701 mono_memory_barrier ();
2702 *(volatile gint32 *)ptr = value;
2706 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2708 mono_memory_barrier ();
2709 *(volatile gint64 *)ptr = value;
2713 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2715 mono_memory_barrier ();
2716 *(volatile void **)ptr = value;
2720 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2722 mono_memory_barrier ();
2723 mono_gc_wbarrier_generic_store (ptr, value);
2727 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2729 mono_memory_barrier ();
2730 *(volatile double *)ptr = value;
2734 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2736 mono_memory_barrier ();
2737 *(volatile float *)ptr = value;
2741 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2743 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2747 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2749 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2753 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2755 InterlockedWrite ((volatile gint32 *)ptr, value);
2759 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2761 #if SIZEOF_VOID_P == 4
2762 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2763 mono_interlocked_lock ();
2764 *(gint64*)ptr = value;
2765 mono_interlocked_unlock ();
2770 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2774 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2776 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2780 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2784 #if SIZEOF_VOID_P == 4
2785 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2786 mono_interlocked_lock ();
2787 *(double*)ptr = value;
2788 mono_interlocked_unlock ();
2795 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2799 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2805 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2809 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2811 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2815 free_context (void *user_data)
2817 ContextStaticData *data = user_data;
2819 mono_threads_lock ();
2822 * There is no guarantee that, by the point this reference queue callback
2823 * has been invoked, the GC handle associated with the object will fail to
2824 * resolve as one might expect. So if we don't free and remove the GC
2825 * handle here, free_context_static_data_helper () could end up resolving
2826 * a GC handle to an actually-dead context which would contain a pointer
2827 * to an already-freed static data segment, resulting in a crash when
2830 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2832 mono_threads_unlock ();
2834 mono_gchandle_free (data->gc_handle);
2835 mono_free_static_data (data->static_data);
2840 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2842 mono_threads_lock ();
2844 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2847 contexts = g_hash_table_new (NULL, NULL);
2850 context_queue = mono_gc_reference_queue_new (free_context);
2852 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2853 g_hash_table_insert (contexts, gch, gch);
2856 * We use this intermediate structure to contain a duplicate pointer to
2857 * the static data because we can't rely on being able to resolve the GC
2858 * handle in the reference queue callback.
2860 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2861 data->gc_handle = GPOINTER_TO_UINT (gch);
2864 context_adjust_static_data (ctx);
2865 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2867 mono_threads_unlock ();
2869 mono_profiler_context_loaded (ctx);
2873 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2876 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2877 * cleanup in exceptional circumstances, we don't actually do any
2878 * cleanup work here. We instead do this via a reference queue.
2881 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2883 mono_profiler_context_unloaded (ctx);
2887 mono_thread_init_tls (void)
2889 MONO_FAST_TLS_INIT (tls_current_object);
2890 mono_native_tls_alloc (¤t_object_key, NULL);
2893 void mono_thread_init (MonoThreadStartCB start_cb,
2894 MonoThreadAttachCB attach_cb)
2896 mono_coop_mutex_init_recursive (&threads_mutex);
2898 mono_os_mutex_init_recursive(&interlocked_mutex);
2899 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2901 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2902 g_assert(background_change_event != NULL);
2904 mono_init_static_data_info (&thread_static_info);
2905 mono_init_static_data_info (&context_static_info);
2907 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2909 mono_thread_start_cb = start_cb;
2910 mono_thread_attach_cb = attach_cb;
2912 /* Get a pseudo handle to the current process. This is just a
2913 * kludge so that wapi can build a process handle if needed.
2914 * As a pseudo handle is returned, we don't need to clean
2917 GetCurrentProcess ();
2920 void mono_thread_cleanup (void)
2922 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2923 MonoThreadInfo *info;
2925 /* The main thread must abandon any held mutexes (particularly
2926 * important for named mutexes as they are shared across
2927 * processes, see bug 74680.) This will happen when the
2928 * thread exits, but if it's not running in a subthread it
2929 * won't exit in time.
2931 info = mono_thread_info_current ();
2932 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2936 /* This stuff needs more testing, it seems one of these
2937 * critical sections can be locked when mono_thread_cleanup is
2940 mono_coop_mutex_destroy (&threads_mutex);
2941 mono_os_mutex_destroy (&interlocked_mutex);
2942 mono_os_mutex_destroy (&delayed_free_table_mutex);
2943 mono_os_mutex_destroy (&small_id_mutex);
2944 CloseHandle (background_change_event);
2947 mono_native_tls_free (current_object_key);
2951 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2953 mono_thread_cleanup_fn = func;
2957 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2959 thread->internal_thread->manage_callback = func;
2963 static void print_tids (gpointer key, gpointer value, gpointer user)
2965 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2966 * sizeof(uint) and a cast to uint would overflow
2968 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2969 * print this as a pointer.
2971 g_message ("Waiting for: %p", key);
2976 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2977 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2981 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2985 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2988 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2991 if(ret==WAIT_FAILED) {
2992 /* See the comment in build_wait_tids() */
2993 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2997 for(i=0; i<wait->num; i++)
2998 CloseHandle (wait->handles[i]);
3000 if (ret == WAIT_TIMEOUT)
3003 for(i=0; i<wait->num; i++) {
3004 gsize tid = wait->threads[i]->tid;
3007 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
3008 * it can still run io-layer etc. code. So wait for it to really exit.
3009 * FIXME: This won't join threads which are not in the joinable_hash yet.
3011 mono_thread_join ((gpointer)tid);
3013 mono_threads_lock ();
3014 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3015 /* This thread must have been killed, because
3016 * it hasn't cleaned itself up. (It's just
3017 * possible that the thread exited before the
3018 * parent thread had a chance to store the
3019 * handle, and now there is another pointer to
3020 * the already-exited thread stored. In this
3021 * case, we'll just get two
3022 * mono_profiler_thread_end() calls for the
3026 mono_threads_unlock ();
3027 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
3028 thread_cleanup (wait->threads[i]);
3030 mono_threads_unlock ();
3035 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
3037 guint32 i, ret, count;
3039 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3041 /* Add the thread state change event, so it wakes up if a thread changes
3042 * to background mode.
3045 if (count < MAXIMUM_WAIT_OBJECTS) {
3046 wait->handles [count] = background_change_event;
3051 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
3054 if(ret==WAIT_FAILED) {
3055 /* See the comment in build_wait_tids() */
3056 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3060 for(i=0; i<wait->num; i++)
3061 CloseHandle (wait->handles[i]);
3063 if (ret == WAIT_TIMEOUT)
3066 if (ret < wait->num) {
3067 gsize tid = wait->threads[ret]->tid;
3068 mono_threads_lock ();
3069 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3070 /* See comment in wait_for_tids about thread cleanup */
3071 mono_threads_unlock ();
3072 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
3073 thread_cleanup (wait->threads [ret]);
3075 mono_threads_unlock ();
3079 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3081 struct wait_data *wait=(struct wait_data *)user;
3083 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
3085 MonoInternalThread *thread=(MonoInternalThread *)value;
3087 /* Ignore background threads, we abort them later */
3088 /* Do not lock here since it is not needed and the caller holds threads_lock */
3089 if (thread->state & ThreadState_Background) {
3090 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3091 return; /* just leave, ignore */
3094 if (mono_gc_is_finalizer_internal_thread (thread)) {
3095 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3099 if (thread == mono_thread_internal_current ()) {
3100 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3104 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3105 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3109 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3110 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3114 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3115 if (handle == NULL) {
3116 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3120 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3121 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3122 wait->handles[wait->num]=handle;
3123 wait->threads[wait->num]=thread;
3126 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3128 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3133 /* Just ignore the rest, we can't do anything with
3140 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3142 struct wait_data *wait=(struct wait_data *)user;
3143 MonoNativeThreadId self = mono_native_thread_id_get ();
3144 MonoInternalThread *thread = (MonoInternalThread *)value;
3147 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3150 /* The finalizer thread is not a background thread */
3151 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3152 && (thread->state & ThreadState_Background) != 0
3153 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3155 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3159 wait->handles[wait->num] = handle;
3160 wait->threads[wait->num] = thread;
3163 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3164 mono_thread_internal_stop (thread);
3168 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3169 && !mono_gc_is_finalizer_internal_thread (thread);
3173 * mono_threads_set_shutting_down:
3175 * Is called by a thread that wants to shut down Mono. If the runtime is already
3176 * shutting down, the calling thread is suspended/stopped, and this function never
3180 mono_threads_set_shutting_down (void)
3182 MonoInternalThread *current_thread = mono_thread_internal_current ();
3184 mono_threads_lock ();
3186 if (shutting_down) {
3187 mono_threads_unlock ();
3189 /* Make sure we're properly suspended/stopped */
3191 LOCK_THREAD (current_thread);
3193 if ((current_thread->state & ThreadState_SuspendRequested) ||
3194 (current_thread->state & ThreadState_AbortRequested) ||
3195 (current_thread->state & ThreadState_StopRequested)) {
3196 UNLOCK_THREAD (current_thread);
3197 mono_thread_execute_interruption ();
3199 current_thread->state |= ThreadState_Stopped;
3200 UNLOCK_THREAD (current_thread);
3203 /*since we're killing the thread, unset the current domain.*/
3204 mono_domain_unset ();
3206 /* Wake up other threads potentially waiting for us */
3207 mono_thread_info_exit ();
3209 shutting_down = TRUE;
3211 /* Not really a background state change, but this will
3212 * interrupt the main thread if it is waiting for all
3213 * the other threads.
3215 SetEvent (background_change_event);
3217 mono_threads_unlock ();
3221 void mono_thread_manage (void)
3223 struct wait_data wait_data;
3224 struct wait_data *wait = &wait_data;
3226 memset (wait, 0, sizeof (struct wait_data));
3227 /* join each thread that's still running */
3228 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3230 mono_threads_lock ();
3232 THREAD_DEBUG (g_message("%s: No threads", __func__));
3233 mono_threads_unlock ();
3236 mono_threads_unlock ();
3239 mono_threads_lock ();
3240 if (shutting_down) {
3241 /* somebody else is shutting down */
3242 mono_threads_unlock ();
3245 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3246 mono_g_hash_table_foreach (threads, print_tids, NULL));
3248 ResetEvent (background_change_event);
3250 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3251 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3252 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3253 mono_threads_unlock ();
3255 /* Something to wait for */
3256 wait_for_tids_or_state_change (wait, INFINITE);
3258 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3259 } while(wait->num>0);
3261 /* Mono is shutting down, so just wait for the end */
3262 if (!mono_runtime_try_shutdown ()) {
3263 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3264 mono_thread_suspend (mono_thread_internal_current ());
3265 mono_thread_execute_interruption ();
3269 * Remove everything but the finalizer thread and self.
3270 * Also abort all the background threads
3273 mono_threads_lock ();
3276 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3277 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3278 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3280 mono_threads_unlock ();
3282 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3284 /* Something to wait for */
3285 wait_for_tids (wait, INFINITE);
3287 } while (wait->num > 0);
3290 * give the subthreads a chance to really quit (this is mainly needed
3291 * to get correct user and system times from getrusage/wait/time(1)).
3292 * This could be removed if we avoid pthread_detach() and use pthread_join().
3294 mono_thread_info_yield ();
3298 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3300 MonoInternalThread *thread = (MonoInternalThread*)value;
3301 struct wait_data *wait = (struct wait_data*)user_data;
3305 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3307 * This needs no locking.
3309 if ((thread->state & ThreadState_Suspended) != 0 ||
3310 (thread->state & ThreadState_Stopped) != 0)
3313 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3314 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3318 wait->handles [wait->num] = handle;
3319 wait->threads [wait->num] = thread;
3325 * mono_thread_suspend_all_other_threads:
3327 * Suspend all managed threads except the finalizer thread and this thread. It is
3328 * not possible to resume them later.
3330 void mono_thread_suspend_all_other_threads (void)
3332 struct wait_data wait_data;
3333 struct wait_data *wait = &wait_data;
3335 MonoNativeThreadId self = mono_native_thread_id_get ();
3336 guint32 eventidx = 0;
3337 gboolean starting, finished;
3339 memset (wait, 0, sizeof (struct wait_data));
3341 * The other threads could be in an arbitrary state at this point, i.e.
3342 * they could be starting up, shutting down etc. This means that there could be
3343 * threads which are not even in the threads hash table yet.
3347 * First we set a barrier which will be checked by all threads before they
3348 * are added to the threads hash table, and they will exit if the flag is set.
3349 * This ensures that no threads could be added to the hash later.
3350 * We will use shutting_down as the barrier for now.
3352 g_assert (shutting_down);
3355 * We make multiple calls to WaitForMultipleObjects since:
3356 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3357 * - some threads could exit without becoming suspended
3362 * Make a copy of the hashtable since we can't do anything with
3363 * threads while threads_mutex is held.
3366 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3367 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3368 mono_threads_lock ();
3369 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3370 mono_threads_unlock ();
3373 /* Get the suspended events that we'll be waiting for */
3374 for (i = 0; i < wait->num; ++i) {
3375 MonoInternalThread *thread = wait->threads [i];
3377 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3378 || mono_gc_is_finalizer_internal_thread (thread)
3379 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3381 //CloseHandle (wait->handles [i]);
3382 wait->threads [i] = NULL; /* ignore this thread in next loop */
3386 LOCK_THREAD (thread);
3388 if ((thread->state & ThreadState_Suspended) != 0 ||
3389 (thread->state & ThreadState_StopRequested) != 0 ||
3390 (thread->state & ThreadState_Stopped) != 0) {
3391 UNLOCK_THREAD (thread);
3392 CloseHandle (wait->handles [i]);
3393 wait->threads [i] = NULL; /* ignore this thread in next loop */
3399 /* Convert abort requests into suspend requests */
3400 if ((thread->state & ThreadState_AbortRequested) != 0)
3401 thread->state &= ~ThreadState_AbortRequested;
3403 thread->state |= ThreadState_SuspendRequested;
3405 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3406 async_suspend_internal (thread, TRUE);
3408 if (eventidx <= 0) {
3410 * If there are threads which are starting up, we wait until they
3411 * are suspended when they try to register in the threads hash.
3412 * This is guaranteed to finish, since the threads which can create new
3413 * threads get suspended after a while.
3414 * FIXME: The finalizer thread can still create new threads.
3416 mono_threads_lock ();
3417 if (threads_starting_up)
3418 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3421 mono_threads_unlock ();
3423 mono_thread_info_sleep (100, NULL);
3431 MonoInternalThread *thread;
3432 MonoStackFrameInfo *frames;
3433 int nframes, max_frames;
3434 int nthreads, max_threads;
3435 MonoInternalThread **threads;
3436 } ThreadDumpUserData;
3438 static gboolean thread_dump_requested;
3440 /* This needs to be async safe */
3442 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3444 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3446 if (ud->nframes < ud->max_frames) {
3447 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3454 /* This needs to be async safe */
3455 static SuspendThreadResult
3456 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3458 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3459 MonoInternalThread *thread = user_data->thread;
3462 /* This no longer works with remote unwinding */
3464 wapi_desc = wapi_current_thread_desc ();
3465 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3470 if (thread == mono_thread_internal_current ())
3471 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3473 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3475 return MonoResumeThread;
3479 int nthreads, max_threads;
3480 MonoInternalThread **threads;
3481 } CollectThreadsUserData;
3484 collect_thread (gpointer key, gpointer value, gpointer user)
3486 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3487 MonoInternalThread *thread = (MonoInternalThread *)value;
3489 if (ud->nthreads < ud->max_threads)
3490 ud->threads [ud->nthreads ++] = thread;
3494 * Collect running threads into the THREADS array.
3495 * THREADS should be an array allocated on the stack.
3498 collect_threads (MonoInternalThread **thread_array, int max_threads)
3500 CollectThreadsUserData ud;
3502 memset (&ud, 0, sizeof (ud));
3503 /* This array contains refs, but its on the stack, so its ok */
3504 ud.threads = thread_array;
3505 ud.max_threads = max_threads;
3507 mono_threads_lock ();
3508 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3509 mono_threads_unlock ();
3515 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3517 GString* text = g_string_new (0);
3519 GError *error = NULL;
3522 ud->thread = thread;
3525 /* Collect frames for the thread */
3526 if (thread == mono_thread_internal_current ()) {
3527 get_thread_dump (mono_thread_info_current (), ud);
3529 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3533 * Do all the non async-safe work outside of get_thread_dump.
3536 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3538 g_string_append_printf (text, "\n\"%s\"", name);
3541 else if (thread->threadpool_thread) {
3542 g_string_append (text, "\n\"<threadpool thread>\"");
3544 g_string_append (text, "\n\"<unnamed thread>\"");
3547 for (i = 0; i < ud->nframes; ++i) {
3548 MonoStackFrameInfo *frame = &ud->frames [i];
3549 MonoMethod *method = NULL;
3551 if (frame->type == FRAME_TYPE_MANAGED)
3552 method = mono_jit_info_get_method (frame->ji);
3555 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3556 g_string_append_printf (text, " %s\n", location);
3559 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3563 fprintf (stdout, "%s", text->str);
3565 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3566 OutputDebugStringA(text->str);
3569 g_string_free (text, TRUE);
3574 mono_threads_perform_thread_dump (void)
3576 ThreadDumpUserData ud;
3577 MonoInternalThread *thread_array [128];
3578 int tindex, nthreads;
3580 if (!thread_dump_requested)
3583 printf ("Full thread dump:\n");
3585 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3586 nthreads = collect_threads (thread_array, 128);
3588 memset (&ud, 0, sizeof (ud));
3589 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3590 ud.max_frames = 256;
3592 for (tindex = 0; tindex < nthreads; ++tindex)
3593 dump_thread (thread_array [tindex], &ud);
3597 thread_dump_requested = FALSE;
3600 /* Obtain the thread dump of all threads */
3602 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3605 ThreadDumpUserData ud;
3606 MonoInternalThread *thread_array [128];
3607 MonoDomain *domain = mono_domain_get ();
3608 MonoDebugSourceLocation *location;
3609 int tindex, nthreads;
3611 mono_error_init (error);
3613 *out_threads = NULL;
3614 *out_stack_frames = NULL;
3616 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3617 nthreads = collect_threads (thread_array, 128);
3619 memset (&ud, 0, sizeof (ud));
3620 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3621 ud.max_frames = 256;
3623 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3626 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3630 for (tindex = 0; tindex < nthreads; ++tindex) {
3631 MonoInternalThread *thread = thread_array [tindex];
3632 MonoArray *thread_frames;
3638 /* Collect frames for the thread */
3639 if (thread == mono_thread_internal_current ()) {
3640 get_thread_dump (mono_thread_info_current (), &ud);
3642 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3645 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3647 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3650 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3652 for (i = 0; i < ud.nframes; ++i) {
3653 MonoStackFrameInfo *frame = &ud.frames [i];
3654 MonoMethod *method = NULL;
3655 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3659 sf->native_offset = frame->native_offset;
3661 if (frame->type == FRAME_TYPE_MANAGED)
3662 method = mono_jit_info_get_method (frame->ji);
3665 sf->method_address = (gsize) frame->ji->code_start;
3667 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3670 MONO_OBJECT_SETREF (sf, method, rm);
3672 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3674 sf->il_offset = location->il_offset;
3676 if (location && location->source_file) {
3677 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3678 sf->line = location->row;
3679 sf->column = location->column;
3681 mono_debug_free_source_location (location);
3686 mono_array_setref (thread_frames, i, sf);
3692 return is_ok (error);
3696 * mono_threads_request_thread_dump:
3698 * Ask all threads except the current to print their stacktrace to stdout.
3701 mono_threads_request_thread_dump (void)
3703 /*The new thread dump code runs out of the finalizer thread. */
3704 thread_dump_requested = TRUE;
3705 mono_gc_finalize_notify ();
3710 gint allocated; /* +1 so that refs [allocated] == NULL */
3714 typedef struct ref_stack RefStack;
3717 ref_stack_new (gint initial_size)
3721 initial_size = MAX (initial_size, 16) + 1;
3722 rs = g_new0 (RefStack, 1);
3723 rs->refs = g_new0 (gpointer, initial_size);
3724 rs->allocated = initial_size;
3729 ref_stack_destroy (gpointer ptr)
3731 RefStack *rs = (RefStack *)ptr;
3740 ref_stack_push (RefStack *rs, gpointer ptr)
3742 g_assert (rs != NULL);
3744 if (rs->bottom >= rs->allocated) {
3745 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3746 rs->allocated <<= 1;
3747 rs->refs [rs->allocated] = NULL;
3749 rs->refs [rs->bottom++] = ptr;
3753 ref_stack_pop (RefStack *rs)
3755 if (rs == NULL || rs->bottom == 0)
3759 rs->refs [rs->bottom] = NULL;
3763 ref_stack_find (RefStack *rs, gpointer ptr)
3770 for (refs = rs->refs; refs && *refs; refs++) {
3778 * mono_thread_push_appdomain_ref:
3780 * Register that the current thread may have references to objects in domain
3781 * @domain on its stack. Each call to this function should be paired with a
3782 * call to pop_appdomain_ref.
3785 mono_thread_push_appdomain_ref (MonoDomain *domain)
3787 MonoInternalThread *thread = mono_thread_internal_current ();
3790 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3791 SPIN_LOCK (thread->lock_thread_id);
3792 if (thread->appdomain_refs == NULL)
3793 thread->appdomain_refs = ref_stack_new (16);
3794 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3795 SPIN_UNLOCK (thread->lock_thread_id);
3800 mono_thread_pop_appdomain_ref (void)
3802 MonoInternalThread *thread = mono_thread_internal_current ();
3805 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3806 SPIN_LOCK (thread->lock_thread_id);
3807 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3808 SPIN_UNLOCK (thread->lock_thread_id);
3813 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3816 SPIN_LOCK (thread->lock_thread_id);
3817 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3818 SPIN_UNLOCK (thread->lock_thread_id);
3823 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3825 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3828 typedef struct abort_appdomain_data {
3829 struct wait_data wait;
3831 } abort_appdomain_data;
3834 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3836 MonoInternalThread *thread = (MonoInternalThread*)value;
3837 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3838 MonoDomain *domain = data->domain;
3840 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3841 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3843 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3844 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3847 data->wait.handles [data->wait.num] = handle;
3848 data->wait.threads [data->wait.num] = thread;
3851 /* Just ignore the rest, we can't do anything with
3859 * mono_threads_abort_appdomain_threads:
3861 * Abort threads which has references to the given appdomain.
3864 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3866 #ifdef __native_client__
3870 abort_appdomain_data user_data;
3872 int orig_timeout = timeout;
3875 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3877 start_time = mono_msec_ticks ();
3879 mono_threads_lock ();
3881 user_data.domain = domain;
3882 user_data.wait.num = 0;
3883 /* This shouldn't take any locks */
3884 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3885 mono_threads_unlock ();
3887 if (user_data.wait.num > 0) {
3888 /* Abort the threads outside the threads lock */
3889 for (i = 0; i < user_data.wait.num; ++i)
3890 mono_thread_internal_abort (user_data.wait.threads [i]);
3893 * We should wait for the threads either to abort, or to leave the
3894 * domain. We can't do the latter, so we wait with a timeout.
3896 wait_for_tids (&user_data.wait, 100);
3899 /* Update remaining time */
3900 timeout -= mono_msec_ticks () - start_time;
3901 start_time = mono_msec_ticks ();
3903 if (orig_timeout != -1 && timeout < 0)
3906 while (user_data.wait.num > 0);
3908 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3914 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3916 MonoInternalThread *thread = (MonoInternalThread*)value;
3917 MonoDomain *domain = (MonoDomain*)user_data;
3920 /* No locking needed here */
3921 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3923 if (thread->cached_culture_info) {
3924 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3925 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3926 if (obj && obj->vtable->domain == domain)
3927 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3933 * mono_threads_clear_cached_culture:
3935 * Clear the cached_current_culture from all threads if it is in the
3939 mono_threads_clear_cached_culture (MonoDomain *domain)
3941 mono_threads_lock ();
3942 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3943 mono_threads_unlock ();
3947 * mono_thread_get_undeniable_exception:
3949 * Return an exception which needs to be raised when leaving a catch clause.
3950 * This is used for undeniable exception propagation.
3953 mono_thread_get_undeniable_exception (void)
3955 MonoInternalThread *thread = mono_thread_internal_current ();
3957 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3959 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3960 * exception if the thread no longer references a dying appdomain.
3962 thread->abort_exc->trace_ips = NULL;
3963 thread->abort_exc->stack_trace = NULL;
3964 return thread->abort_exc;
3970 #if MONO_SMALL_CONFIG
3971 #define NUM_STATIC_DATA_IDX 4
3972 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3976 #define NUM_STATIC_DATA_IDX 8
3977 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3978 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3982 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3983 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3986 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3988 gpointer *static_data = (gpointer *)addr;
3990 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3991 void **ptr = (void **)static_data [i];
3996 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3997 void **p = ptr + idx;
4000 mark_func ((MonoObject**)p, gc_data);
4006 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4008 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4012 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4014 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4018 * mono_alloc_static_data
4020 * Allocate memory blocks for storing threads or context static data
4023 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4025 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4028 gpointer* static_data = *static_data_ptr;
4030 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4031 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4033 if (mono_gc_user_markers_supported ()) {
4034 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4035 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4037 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4038 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4041 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4042 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4043 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4044 *static_data_ptr = static_data;
4045 static_data [0] = static_data;
4048 for (i = 1; i <= idx; ++i) {
4049 if (static_data [i])
4052 if (mono_gc_user_markers_supported ())
4053 static_data [i] = g_malloc0 (static_data_size [i]);
4055 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4056 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4057 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4062 mono_free_static_data (gpointer* static_data)
4065 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4066 gpointer p = static_data [i];
4070 * At this point, the static data pointer array is still registered with the
4071 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4072 * data. Freeing the individual arrays without first nulling their slots
4073 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4074 * such an already freed array. See bug #13813.
4076 static_data [i] = NULL;
4077 mono_memory_write_barrier ();
4078 if (mono_gc_user_markers_supported ())
4081 mono_gc_free_fixed (p);
4083 mono_gc_free_fixed (static_data);
4087 * mono_init_static_data_info
4089 * Initializes static data counters
4091 static void mono_init_static_data_info (StaticDataInfo *static_data)
4093 static_data->idx = 0;
4094 static_data->offset = 0;
4095 static_data->freelist = NULL;
4099 * mono_alloc_static_data_slot
4101 * Generates an offset for static data. static_data contains the counters
4102 * used to generate it.
4105 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4107 if (!static_data->idx && !static_data->offset) {
4109 * we use the first chunk of the first allocation also as
4110 * an array for the rest of the data
4112 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4114 static_data->offset += align - 1;
4115 static_data->offset &= ~(align - 1);
4116 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4117 static_data->idx ++;
4118 g_assert (size <= static_data_size [static_data->idx]);
4119 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4120 static_data->offset = 0;
4122 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4123 static_data->offset += size;
4128 * ensure thread static fields already allocated are valid for thread
4129 * This function is called when a thread is created or on thread attach.
4132 thread_adjust_static_data (MonoInternalThread *thread)
4134 mono_threads_lock ();
4135 if (thread_static_info.offset || thread_static_info.idx > 0) {
4136 /* get the current allocated size */
4137 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4138 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4140 mono_threads_unlock ();
4144 * LOCKING: requires that threads_mutex is held
4147 context_adjust_static_data (MonoAppContext *ctx)
4149 if (context_static_info.offset || context_static_info.idx > 0) {
4150 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4151 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4152 ctx->data->static_data = ctx->static_data;
4157 * LOCKING: requires that threads_mutex is held
4160 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4162 MonoInternalThread *thread = (MonoInternalThread *)value;
4163 guint32 offset = GPOINTER_TO_UINT (user);
4165 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4169 * LOCKING: requires that threads_mutex is held
4172 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4174 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4179 guint32 offset = GPOINTER_TO_UINT (user);
4180 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4181 ctx->data->static_data = ctx->static_data;
4184 static StaticDataFreeList*
4185 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4187 StaticDataFreeList* prev = NULL;
4188 StaticDataFreeList* tmp = static_data->freelist;
4190 if (tmp->size == size) {
4192 prev->next = tmp->next;
4194 static_data->freelist = tmp->next;
4203 #if SIZEOF_VOID_P == 4
4210 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4212 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4214 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4215 MonoBitSet *rb = sets [idx];
4216 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4217 offset /= sizeof (uintptr_t);
4218 /* offset is now the bitmap offset */
4219 for (int i = 0; i < numbits; ++i) {
4220 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4221 mono_bitset_set_fast (rb, offset + i);
4226 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4228 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4229 MonoBitSet *rb = sets [idx];
4230 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4231 offset /= sizeof (uintptr_t);
4232 /* offset is now the bitmap offset */
4233 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4234 mono_bitset_clear_fast (rb, offset + i);
4238 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4240 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4242 StaticDataInfo *info;
4245 if (static_type == SPECIAL_STATIC_THREAD) {
4246 info = &thread_static_info;
4247 sets = thread_reference_bitmaps;
4249 info = &context_static_info;
4250 sets = context_reference_bitmaps;
4253 mono_threads_lock ();
4255 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4259 offset = item->offset;
4262 offset = mono_alloc_static_data_slot (info, size, align);
4265 update_reference_bitmap (sets, offset, bitmap, numbits);
4267 if (static_type == SPECIAL_STATIC_THREAD) {
4268 /* This can be called during startup */
4269 if (threads != NULL)
4270 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4272 if (contexts != NULL)
4273 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4275 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4278 mono_threads_unlock ();
4284 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4286 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4288 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4289 return get_thread_static_data (thread, offset);
4291 return get_context_static_data (thread->current_appcontext, offset);
4296 mono_get_special_static_data (guint32 offset)
4298 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4307 * LOCKING: requires that threads_mutex is held
4310 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4312 MonoInternalThread *thread = (MonoInternalThread *)value;
4313 OffsetSize *data = (OffsetSize *)user;
4314 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4315 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4318 if (!thread->static_data || !thread->static_data [idx])
4320 ptr = ((char*) thread->static_data [idx]) + off;
4321 mono_gc_bzero_atomic (ptr, data->size);
4325 * LOCKING: requires that threads_mutex is held
4328 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4330 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4335 OffsetSize *data = (OffsetSize *)user;
4336 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4337 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4340 if (!ctx->static_data || !ctx->static_data [idx])
4343 ptr = ((char*) ctx->static_data [idx]) + off;
4344 mono_gc_bzero_atomic (ptr, data->size);
4348 do_free_special_slot (guint32 offset, guint32 size)
4350 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4352 StaticDataInfo *info;
4354 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4355 info = &thread_static_info;
4356 sets = thread_reference_bitmaps;
4358 info = &context_static_info;
4359 sets = context_reference_bitmaps;
4362 guint32 data_offset = offset;
4363 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4364 OffsetSize data = { data_offset, size };
4366 clear_reference_bitmap (sets, data.offset, data.size);
4368 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4369 if (threads != NULL)
4370 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4372 if (contexts != NULL)
4373 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4376 if (!mono_runtime_is_shutting_down ()) {
4377 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4379 item->offset = offset;
4382 item->next = info->freelist;
4383 info->freelist = item;
4388 do_free_special (gpointer key, gpointer value, gpointer data)
4390 MonoClassField *field = (MonoClassField *)key;
4391 guint32 offset = GPOINTER_TO_UINT (value);
4394 size = mono_type_size (field->type, &align);
4395 do_free_special_slot (offset, size);
4399 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4401 mono_threads_lock ();
4403 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4405 mono_threads_unlock ();
4409 static void CALLBACK dummy_apc (ULONG_PTR param)
4415 * mono_thread_execute_interruption
4417 * Performs the operation that the requested thread state requires (abort,
4420 static MonoException*
4421 mono_thread_execute_interruption (void)
4423 MonoInternalThread *thread = mono_thread_internal_current ();
4424 MonoThread *sys_thread = mono_thread_current ();
4426 LOCK_THREAD (thread);
4428 /* MonoThread::interruption_requested can only be changed with atomics */
4429 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4430 /* this will consume pending APC calls */
4432 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4434 InterlockedDecrement (&thread_interruption_requested);
4436 /* Clear the interrupted flag of the thread so it can wait again */
4437 mono_thread_info_clear_self_interrupt ();
4440 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4441 if (sys_thread->pending_exception) {
4444 exc = sys_thread->pending_exception;
4445 sys_thread->pending_exception = NULL;
4447 UNLOCK_THREAD (thread);
4449 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4450 UNLOCK_THREAD (thread);
4451 g_assert (sys_thread->pending_exception == NULL);
4452 if (thread->abort_exc == NULL) {
4454 * This might be racy, but it has to be called outside the lock
4455 * since it calls managed code.
4457 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4459 return thread->abort_exc;
4461 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4462 /* calls UNLOCK_THREAD (thread) */
4463 self_suspend_internal ();
4466 else if ((thread->state & ThreadState_StopRequested) != 0) {
4467 /* FIXME: do this through the JIT? */
4469 UNLOCK_THREAD (thread);
4471 mono_thread_exit ();
4473 } else if (thread->thread_interrupt_requested) {
4475 thread->thread_interrupt_requested = FALSE;
4476 UNLOCK_THREAD (thread);
4478 return(mono_get_exception_thread_interrupted ());
4481 UNLOCK_THREAD (thread);
4487 * mono_thread_request_interruption
4489 * A signal handler can call this method to request the interruption of a
4490 * thread. The result of the interruption will depend on the current state of
4491 * the thread. If the result is an exception that needs to be throw, it is
4492 * provided as return value.
4495 mono_thread_request_interruption (gboolean running_managed)
4497 MonoInternalThread *thread = mono_thread_internal_current ();
4499 /* The thread may already be stopping */
4504 if (thread->interrupt_on_stop &&
4505 thread->state & ThreadState_StopRequested &&
4506 thread->state & ThreadState_Background)
4510 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4512 InterlockedIncrement (&thread_interruption_requested);
4514 if (!running_managed || is_running_protected_wrapper ()) {
4515 /* Can't stop while in unmanaged code. Increase the global interruption
4516 request count. When exiting the unmanaged method the count will be
4517 checked and the thread will be interrupted. */
4519 /* this will awake the thread if it is in WaitForSingleObject
4521 /* Our implementation of this function ignores the func argument */
4523 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4525 mono_thread_info_self_interrupt ();
4530 return mono_thread_execute_interruption ();
4534 /*This function should be called by a thread after it has exited all of
4535 * its handle blocks at interruption time.*/
4537 mono_thread_resume_interruption (void)
4539 MonoInternalThread *thread = mono_thread_internal_current ();
4540 gboolean still_aborting;
4542 /* The thread may already be stopping */
4546 LOCK_THREAD (thread);
4547 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4548 UNLOCK_THREAD (thread);
4550 /*This can happen if the protected block called Thread::ResetAbort*/
4551 if (!still_aborting)
4554 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4556 InterlockedIncrement (&thread_interruption_requested);
4558 mono_thread_info_self_interrupt ();
4560 return mono_thread_execute_interruption ();
4563 gboolean mono_thread_interruption_requested ()
4565 if (thread_interruption_requested) {
4566 MonoInternalThread *thread = mono_thread_internal_current ();
4567 /* The thread may already be stopping */
4569 return (thread->interruption_requested);
4574 static MonoException*
4575 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4577 MonoInternalThread *thread = mono_thread_internal_current ();
4579 /* The thread may already be stopping */
4583 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4584 MonoException* exc = mono_thread_execute_interruption ();
4592 * Performs the interruption of the current thread, if one has been requested,
4593 * and the thread is not running a protected wrapper.
4594 * Return the exception which needs to be thrown, if any.
4597 mono_thread_interruption_checkpoint (void)
4599 return mono_thread_interruption_checkpoint_request (FALSE);
4603 * Performs the interruption of the current thread, if one has been requested.
4604 * Return the exception which needs to be thrown, if any.
4607 mono_thread_force_interruption_checkpoint_noraise (void)
4609 return mono_thread_interruption_checkpoint_request (TRUE);
4613 * mono_set_pending_exception:
4615 * Set the pending exception of the current thread to EXC.
4616 * The exception will be thrown when execution returns to managed code.
4619 mono_set_pending_exception (MonoException *exc)
4621 MonoThread *thread = mono_thread_current ();
4623 /* The thread may already be stopping */
4627 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4629 mono_thread_request_interruption (FALSE);
4633 * mono_thread_interruption_request_flag:
4635 * Returns the address of a flag that will be non-zero if an interruption has
4636 * been requested for a thread. The thread to interrupt may not be the current
4637 * thread, so an additional call to mono_thread_interruption_requested() or
4638 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4641 gint32* mono_thread_interruption_request_flag ()
4643 return &thread_interruption_requested;
4647 mono_thread_init_apartment_state (void)
4650 MonoInternalThread* thread = mono_thread_internal_current ();
4652 /* Positive return value indicates success, either
4653 * S_OK if this is first CoInitialize call, or
4654 * S_FALSE if CoInitialize already called, but with same
4655 * threading model. A negative value indicates failure,
4656 * probably due to trying to change the threading model.
4658 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4659 ? COINIT_APARTMENTTHREADED
4660 : COINIT_MULTITHREADED) < 0) {
4661 thread->apartment_state = ThreadApartmentState_Unknown;
4667 mono_thread_cleanup_apartment_state (void)
4670 MonoInternalThread* thread = mono_thread_internal_current ();
4672 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4679 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4681 LOCK_THREAD (thread);
4682 thread->state |= state;
4683 UNLOCK_THREAD (thread);
4687 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4689 LOCK_THREAD (thread);
4690 thread->state &= ~state;
4691 UNLOCK_THREAD (thread);
4695 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4697 gboolean ret = FALSE;
4699 LOCK_THREAD (thread);
4701 if ((thread->state & test) != 0) {
4705 UNLOCK_THREAD (thread);
4710 static gboolean has_tls_get = FALSE;
4713 mono_runtime_set_has_tls_get (gboolean val)
4719 mono_runtime_has_tls_get (void)
4725 self_interrupt_thread (void *_unused)
4727 MonoThreadInfo *info = mono_thread_info_current ();
4728 MonoException *exc = mono_thread_execute_interruption ();
4729 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4730 mono_raise_exception_with_context (exc, &info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX].ctx); /* FIXME using thread_saved_state [ASYNC_SUSPEND_STATE_INDEX] can race with another suspend coming in. */
4731 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4735 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4739 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4743 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4745 MonoJitInfo **dest = (MonoJitInfo **)data;
4751 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4753 MonoJitInfo *ji = NULL;
4758 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4759 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4760 * where we hold runtime locks.
4762 if (!mono_threads_is_coop_enabled ())
4763 mono_thread_info_set_is_async_context (TRUE);
4764 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4765 if (!mono_threads_is_coop_enabled ())
4766 mono_thread_info_set_is_async_context (FALSE);
4771 MonoInternalThread *thread;
4772 gboolean install_async_abort;
4773 MonoThreadInfoInterruptToken *interrupt_token;
4776 static SuspendThreadResult
4777 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4779 AbortThreadData *data = (AbortThreadData *)ud;
4780 MonoInternalThread *thread = data->thread;
4781 MonoJitInfo *ji = NULL;
4782 gboolean protected_wrapper;
4783 gboolean running_managed;
4785 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4786 return MonoResumeThread;
4788 /*someone is already interrupting it*/
4789 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4790 return MonoResumeThread;
4792 InterlockedIncrement (&thread_interruption_requested);
4794 ji = mono_thread_info_get_last_managed (info);
4795 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4796 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4798 if (!protected_wrapper && running_managed) {
4799 /*We are in managed code*/
4800 /*Set the thread to call */
4801 if (data->install_async_abort)
4802 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4803 return MonoResumeThread;
4806 * This will cause waits to be broken.
4807 * It will also prevent the thread from entering a wait, so if the thread returns
4808 * from the wait before it receives the abort signal, it will just spin in the wait
4809 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4812 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4814 return MonoResumeThread;
4819 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4821 AbortThreadData data;
4823 g_assert (thread != mono_thread_internal_current ());
4825 data.thread = thread;
4826 data.install_async_abort = install_async_abort;
4827 data.interrupt_token = NULL;
4829 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4830 if (data.interrupt_token)
4831 mono_thread_info_finish_interrupt (data.interrupt_token);
4832 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4836 self_abort_internal (MonoError *error)
4840 mono_error_init (error);
4842 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4843 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4845 exc = mono_thread_request_interruption (TRUE);
4847 mono_error_set_exception_instance (error, exc);
4849 mono_thread_info_self_interrupt ();
4853 MonoInternalThread *thread;
4855 MonoThreadInfoInterruptToken *interrupt_token;
4856 } SuspendThreadData;
4858 static SuspendThreadResult
4859 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4861 SuspendThreadData *data = (SuspendThreadData *)ud;
4862 MonoInternalThread *thread = data->thread;
4863 MonoJitInfo *ji = NULL;
4864 gboolean protected_wrapper;
4865 gboolean running_managed;
4867 ji = mono_thread_info_get_last_managed (info);
4868 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4869 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4871 if (running_managed && !protected_wrapper) {
4872 thread->state &= ~ThreadState_SuspendRequested;
4873 thread->state |= ThreadState_Suspended;
4874 return KeepSuspended;
4876 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4877 InterlockedIncrement (&thread_interruption_requested);
4878 if (data->interrupt)
4879 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4881 return MonoResumeThread;
4885 /* LOCKING: called with @thread synch_cs held, and releases it */
4887 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4889 SuspendThreadData data;
4891 g_assert (thread != mono_thread_internal_current ());
4893 data.thread = thread;
4894 data.interrupt = interrupt;
4895 data.interrupt_token = NULL;
4897 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4898 if (data.interrupt_token)
4899 mono_thread_info_finish_interrupt (data.interrupt_token);
4901 UNLOCK_THREAD (thread);
4904 /* LOCKING: called with @thread synch_cs held, and releases it */
4906 self_suspend_internal (void)
4908 MonoInternalThread *thread;
4910 thread = mono_thread_internal_current ();
4912 mono_thread_info_begin_self_suspend ();
4913 thread->state &= ~ThreadState_SuspendRequested;
4914 thread->state |= ThreadState_Suspended;
4916 UNLOCK_THREAD (thread);
4918 mono_thread_info_end_self_suspend ();
4922 * mono_thread_is_foreign:
4923 * @thread: the thread to query
4925 * This function allows one to determine if a thread was created by the mono runtime and has
4926 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4928 * Returns: TRUE if @thread was not created by the runtime.
4931 mono_thread_is_foreign (MonoThread *thread)
4933 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4934 return info->runtime_thread == FALSE;
4938 * mono_add_joinable_thread:
4940 * Add TID to the list of joinable threads.
4941 * LOCKING: Acquires the threads lock.
4944 mono_threads_add_joinable_thread (gpointer tid)
4948 * We cannot detach from threads because it causes problems like
4949 * 2fd16f60/r114307. So we collect them and join them when
4950 * we have time (in he finalizer thread).
4952 joinable_threads_lock ();
4953 if (!joinable_threads)
4954 joinable_threads = g_hash_table_new (NULL, NULL);
4955 g_hash_table_insert (joinable_threads, tid, tid);
4956 joinable_thread_count ++;
4957 joinable_threads_unlock ();
4959 mono_gc_finalize_notify ();
4964 * mono_threads_join_threads:
4966 * Join all joinable threads. This is called from the finalizer thread.
4967 * LOCKING: Acquires the threads lock.
4970 mono_threads_join_threads (void)
4973 GHashTableIter iter;
4980 if (!joinable_thread_count)
4984 joinable_threads_lock ();
4986 if (g_hash_table_size (joinable_threads)) {
4987 g_hash_table_iter_init (&iter, joinable_threads);
4988 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4989 thread = (pthread_t)tid;
4990 g_hash_table_remove (joinable_threads, key);
4991 joinable_thread_count --;
4994 joinable_threads_unlock ();
4996 if (thread != pthread_self ())
4997 /* This shouldn't block */
4998 pthread_join (thread, NULL);
5009 * Wait for thread TID to exit.
5010 * LOCKING: Acquires the threads lock.
5013 mono_thread_join (gpointer tid)
5017 gboolean found = FALSE;
5019 joinable_threads_lock ();
5020 if (!joinable_threads)
5021 joinable_threads = g_hash_table_new (NULL, NULL);
5022 if (g_hash_table_lookup (joinable_threads, tid)) {
5023 g_hash_table_remove (joinable_threads, tid);
5024 joinable_thread_count --;
5027 joinable_threads_unlock ();
5030 thread = (pthread_t)tid;
5031 pthread_join (thread, NULL);
5036 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5038 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5039 mono_thread_interruption_checkpoint ();
5042 static inline gboolean
5043 is_appdomainunloaded_exception (MonoClass *klass)
5045 return klass == mono_class_get_appdomain_unloaded_exception_class ();
5048 static inline gboolean
5049 is_threadabort_exception (MonoClass *klass)
5051 return klass == mono_defaults.threadabortexception_class;
5055 mono_thread_internal_unhandled_exception (MonoObject* exc)
5057 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5058 MonoClass *klass = exc->vtable->klass;
5059 if (is_threadabort_exception (klass)) {
5060 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5061 } else if (!is_appdomainunloaded_exception (klass)) {
5062 mono_unhandled_exception (exc);
5063 if (mono_environment_exitcode_get () == 1)
5070 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5073 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5074 mono_error_set_pending_exception (&error);
5078 * mono_threads_attach_coop: called by native->managed wrappers
5082 * - @return: the original domain which needs to be restored, or NULL.
5085 * - @dummy: contains the original domain
5086 * - @return: a cookie containing current MonoThreadInfo*.
5089 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5092 gboolean fresh_thread;
5095 /* Happens when called from AOTed code which is only used in the root domain. */
5096 domain = mono_get_root_domain ();
5101 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5102 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5103 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5104 * we're only responsible for making the cookie. */
5105 if (mono_threads_is_coop_enabled ()) {
5106 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5107 fresh_thread = !info || !mono_thread_info_is_live (info);
5110 if (!mono_thread_internal_current ()) {
5111 mono_thread_attach_full (domain, FALSE);
5114 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5117 orig = mono_domain_get ();
5119 mono_domain_set (domain, TRUE);
5121 if (!mono_threads_is_coop_enabled ())
5122 return orig != domain ? orig : NULL;
5126 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5127 * return the right cookie. */
5128 return mono_threads_enter_gc_unsafe_region_cookie ();
5131 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5132 return mono_threads_enter_gc_unsafe_region (dummy);
5137 * mono_threads_detach_coop: called by native->managed wrappers
5140 * - @cookie: the original domain which needs to be restored, or NULL.
5144 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5145 * - @dummy: contains the original domain
5148 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5150 MonoDomain *domain, *orig;
5152 if (!mono_threads_is_coop_enabled ()) {
5153 orig = (MonoDomain*) cookie;
5155 mono_domain_set (orig, TRUE);
5157 orig = (MonoDomain*) *dummy;
5159 domain = mono_domain_get ();
5162 /* it won't do anything if cookie is NULL
5163 * thread state RUNNING -> (RUNNING|BLOCKING) */
5164 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5166 if (orig != domain) {
5168 mono_domain_unset ();
5170 mono_domain_set (orig, TRUE);