3 * Thread support internal calls
6 * Dick Porter (dick@ximian.com)
7 * Paolo Molaro (lupus@ximian.com)
8 * Patrik Torstensson (patrik.torstensson@labs2.com)
10 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
11 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
12 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
13 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
21 #include <mono/metadata/object.h>
22 #include <mono/metadata/domain-internals.h>
23 #include <mono/metadata/profiler-private.h>
24 #include <mono/metadata/threads.h>
25 #include <mono/metadata/threads-types.h>
26 #include <mono/metadata/exception.h>
27 #include <mono/metadata/environment.h>
28 #include <mono/metadata/monitor.h>
29 #include <mono/metadata/gc-internals.h>
30 #include <mono/metadata/marshal.h>
31 #include <mono/metadata/runtime.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/debug-internals.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-error-internals.h>
46 #include <mono/utils/os-event.h>
47 #include <mono/utils/mono-threads-debug.h>
48 #include <mono/utils/unlocked.h>
49 #include <mono/metadata/w32handle.h>
50 #include <mono/metadata/w32event.h>
51 #include <mono/metadata/w32mutex.h>
53 #include <mono/metadata/reflection-internals.h>
54 #include <mono/metadata/abi-details.h>
55 #include <mono/metadata/w32error.h>
56 #include <mono/utils/w32api.h>
57 #include <mono/utils/mono-os-wait.h>
63 #if defined(HOST_WIN32)
67 mono_native_thread_join_handle (HANDLE thread_handle, gboolean close_handle);
70 #if defined(HOST_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
71 #define USE_TKILL_ON_ANDROID 1
77 #ifdef USE_TKILL_ON_ANDROID
78 extern int tkill (pid_t tid, int signal);
82 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
83 #define THREAD_DEBUG(a)
84 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
85 #define THREAD_WAIT_DEBUG(a)
86 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
87 #define LIBGC_DEBUG(a)
89 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
90 #define SPIN_LOCK(i) do { \
91 if (SPIN_TRYLOCK (i)) \
95 #define SPIN_UNLOCK(i) i = 0
97 #define LOCK_THREAD(thread) lock_thread((thread))
98 #define UNLOCK_THREAD(thread) unlock_thread((thread))
110 typedef struct _StaticDataFreeList StaticDataFreeList;
111 struct _StaticDataFreeList {
112 StaticDataFreeList *next;
120 StaticDataFreeList *freelist;
123 /* Controls access to the 'threads' hash table */
124 static void mono_threads_lock (void);
125 static void mono_threads_unlock (void);
126 static MonoCoopMutex threads_mutex;
128 /* Controls access to the 'joinable_threads' hash table */
129 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
130 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
131 static mono_mutex_t joinable_threads_mutex;
133 /* Holds current status of static data heap */
134 static StaticDataInfo thread_static_info;
135 static StaticDataInfo context_static_info;
137 /* The hash of existing threads (key is thread ID, value is
138 * MonoInternalThread*) that need joining before exit
140 static MonoGHashTable *threads=NULL;
142 /* List of app context GC handles.
143 * Added to from mono_threads_register_app_context ().
145 static GHashTable *contexts = NULL;
147 /* Cleanup queue for contexts. */
148 static MonoReferenceQueue *context_queue;
151 * Threads which are starting up and they are not in the 'threads' hash yet.
152 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
153 * Protected by mono_threads_lock ().
155 static MonoGHashTable *threads_starting_up = NULL;
158 /* Protected by the threads lock */
159 static GHashTable *joinable_threads;
160 static gint32 joinable_thread_count;
162 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
163 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
165 /* function called at thread start */
166 static MonoThreadStartCB mono_thread_start_cb = NULL;
168 /* function called at thread attach */
169 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
171 /* function called at thread cleanup */
172 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
174 /* The default stack size for each thread */
175 static guint32 default_stacksize = 0;
176 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
178 static void context_adjust_static_data (MonoAppContext *ctx);
179 static void mono_free_static_data (gpointer* static_data);
180 static void mono_init_static_data_info (StaticDataInfo *static_data);
181 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
182 static gboolean mono_thread_resume (MonoInternalThread* thread);
183 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
184 static void self_abort_internal (MonoError *error);
185 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
186 static void self_suspend_internal (void);
188 static MonoException* mono_thread_execute_interruption (void);
189 static void ref_stack_destroy (gpointer rs);
191 /* Spin lock for InterlockedXXX 64 bit functions */
192 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
193 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
194 static mono_mutex_t interlocked_mutex;
196 /* global count of thread interruptions requested */
197 static gint32 thread_interruption_requested = 0;
199 /* Event signaled when a thread changes its background mode */
200 static MonoOSEvent background_change_event;
202 static gboolean shutting_down = FALSE;
204 static gint32 managed_thread_id_counter = 0;
207 mono_threads_lock (void)
209 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
213 mono_threads_unlock (void)
215 mono_locks_coop_release (&threads_mutex, ThreadsLock);
220 get_next_managed_thread_id (void)
222 return InterlockedIncrement (&managed_thread_id_counter);
226 * We separate interruptions/exceptions into either sync (they can be processed anytime,
227 * normally as soon as they are set, and are set by the same thread) and async (they can't
228 * be processed inside abort protected blocks and are normally set by other threads). We
229 * can have both a pending sync and async interruption. In this case, the sync exception is
230 * processed first. Since we clean sync flag first, mono_thread_execute_interruption must
231 * also handle all sync type exceptions before the async type exceptions.
234 INTERRUPT_SYNC_REQUESTED_BIT = 0x1,
235 INTERRUPT_ASYNC_REQUESTED_BIT = 0x2,
236 INTERRUPT_REQUESTED_MASK = 0x3,
237 ABORT_PROT_BLOCK_SHIFT = 2,
238 ABORT_PROT_BLOCK_BITS = 8,
239 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
243 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
245 gsize state = thread->thread_state;
246 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
250 mono_threads_begin_abort_protected_block (void)
252 MonoInternalThread *thread = mono_thread_internal_current ();
253 gsize old_state, new_state;
256 old_state = thread->thread_state;
258 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
259 //bounds check abort_prot_count
260 g_assert (new_val > 0);
261 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
263 new_state = old_state + (1 << ABORT_PROT_BLOCK_SHIFT);
264 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
266 /* Defer async request since we won't be able to process until exiting the block */
267 if (new_val == 1 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
268 InterlockedDecrement (&thread_interruption_requested);
269 THREADS_INTERRUPT_DEBUG ("[%d] begin abort protected block old_state %ld new_state %ld, defer tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
270 if (thread_interruption_requested < 0)
271 g_warning ("bad thread_interruption_requested state");
273 THREADS_INTERRUPT_DEBUG ("[%d] begin abort protected block old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
278 mono_thread_state_has_interruption (gsize state)
280 /* pending exception, self abort */
281 if (state & INTERRUPT_SYNC_REQUESTED_BIT)
284 /* abort, interruption, suspend */
285 if ((state & INTERRUPT_ASYNC_REQUESTED_BIT) && !(state & ABORT_PROT_BLOCK_MASK))
292 mono_threads_end_abort_protected_block (void)
294 MonoInternalThread *thread = mono_thread_internal_current ();
295 gsize old_state, new_state;
298 old_state = thread->thread_state;
300 //bounds check abort_prot_count
301 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
302 g_assert (new_val >= 0);
303 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
305 new_state = old_state - (1 << ABORT_PROT_BLOCK_SHIFT);
306 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
308 if (new_val == 0 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
309 InterlockedIncrement (&thread_interruption_requested);
310 THREADS_INTERRUPT_DEBUG ("[%d] end abort protected block old_state %ld new_state %ld, restore tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
312 THREADS_INTERRUPT_DEBUG ("[%d] end abort protected block old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
315 return mono_thread_state_has_interruption (new_state);
319 mono_thread_get_interruption_requested (MonoInternalThread *thread)
321 gsize state = thread->thread_state;
323 return mono_thread_state_has_interruption (state);
327 * Returns TRUE is there was a state change
328 * We clear a single interruption request, sync has priority.
331 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
333 gsize old_state, new_state;
335 old_state = thread->thread_state;
337 // no interruption to process
338 if (!(old_state & INTERRUPT_SYNC_REQUESTED_BIT) &&
339 (!(old_state & INTERRUPT_ASYNC_REQUESTED_BIT) || (old_state & ABORT_PROT_BLOCK_MASK)))
342 if (old_state & INTERRUPT_SYNC_REQUESTED_BIT)
343 new_state = old_state & ~INTERRUPT_SYNC_REQUESTED_BIT;
345 new_state = old_state & ~INTERRUPT_ASYNC_REQUESTED_BIT;
346 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
348 InterlockedDecrement (&thread_interruption_requested);
349 THREADS_INTERRUPT_DEBUG ("[%d] clear interruption old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
350 if (thread_interruption_requested < 0)
351 g_warning ("bad thread_interruption_requested state");
355 /* Returns TRUE is there was a state change and the interruption can be processed */
357 mono_thread_set_interruption_requested (MonoInternalThread *thread)
359 //always force when the current thread is doing it to itself.
360 gboolean sync = thread == mono_thread_internal_current ();
361 gsize old_state, new_state;
363 old_state = thread->thread_state;
366 if ((sync && (old_state & INTERRUPT_SYNC_REQUESTED_BIT)) ||
367 (!sync && (old_state & INTERRUPT_ASYNC_REQUESTED_BIT)))
371 new_state = old_state | INTERRUPT_SYNC_REQUESTED_BIT;
373 new_state = old_state | INTERRUPT_ASYNC_REQUESTED_BIT;
374 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
376 if (sync || !(new_state & ABORT_PROT_BLOCK_MASK)) {
377 InterlockedIncrement (&thread_interruption_requested);
378 THREADS_INTERRUPT_DEBUG ("[%d] set interruption on [%d] old_state %ld new_state %ld, tir %d\n", mono_thread_internal_current ()->small_id, thread->small_id, old_state, new_state, thread_interruption_requested);
380 THREADS_INTERRUPT_DEBUG ("[%d] set interruption on [%d] old_state %ld new_state %ld, tir deferred %d\n", mono_thread_internal_current ()->small_id, thread->small_id, old_state, new_state, thread_interruption_requested);
383 return sync || !(new_state & ABORT_PROT_BLOCK_MASK);
386 static inline MonoNativeThreadId
387 thread_get_tid (MonoInternalThread *thread)
389 /* We store the tid as a guint64 to keep the object layout constant between platforms */
390 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
393 static void ensure_synch_cs_set (MonoInternalThread *thread)
395 MonoCoopMutex *synch_cs;
397 if (thread->synch_cs != NULL) {
401 synch_cs = g_new0 (MonoCoopMutex, 1);
402 mono_coop_mutex_init_recursive (synch_cs);
404 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
405 synch_cs, NULL) != NULL) {
406 /* Another thread must have installed this CS */
407 mono_coop_mutex_destroy (synch_cs);
413 lock_thread (MonoInternalThread *thread)
415 if (!thread->synch_cs)
416 ensure_synch_cs_set (thread);
418 g_assert (thread->synch_cs);
420 mono_coop_mutex_lock (thread->synch_cs);
424 unlock_thread (MonoInternalThread *thread)
426 mono_coop_mutex_unlock (thread->synch_cs);
429 static inline gboolean
430 is_appdomainunloaded_exception (MonoClass *klass)
432 return klass == mono_class_get_appdomain_unloaded_exception_class ();
435 static inline gboolean
436 is_threadabort_exception (MonoClass *klass)
438 return klass == mono_defaults.threadabortexception_class;
442 * A special static data offset (guint32) consists of 3 parts:
444 * [0] 6-bit index into the array of chunks.
445 * [6] 25-bit offset into the array.
446 * [31] Bit indicating thread or context static.
451 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
462 } SpecialStaticOffset;
464 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
465 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
467 #define MAKE_SPECIAL_STATIC_OFFSET(idx, off, ty) \
468 ((SpecialStaticOffset) { .fields = { .index = (idx), .offset = (off), .type = (ty) } }.raw)
469 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
470 (((SpecialStaticOffset *) &(x))->fields.f)
473 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
475 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
477 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
478 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
480 return ((char *) thread->static_data [idx]) + off;
484 get_context_static_data (MonoAppContext *ctx, guint32 offset)
486 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
488 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
489 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
491 return ((char *) ctx->static_data [idx]) + off;
495 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
497 static MonoClassField *current_thread_field = NULL;
501 if (!current_thread_field) {
502 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
503 g_assert (current_thread_field);
506 mono_class_vtable (domain, mono_defaults.thread_class);
507 mono_domain_lock (domain);
508 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
509 mono_domain_unlock (domain);
512 return (MonoThread **)get_thread_static_data (thread, offset);
516 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
518 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
520 g_assert (current->obj.vtable->domain == domain);
522 g_assert (!*current_thread_ptr);
523 *current_thread_ptr = current;
527 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
533 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
536 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
537 /* only possible failure mode is OOM, from which we don't expect to recover. */
538 mono_error_assert_ok (&error);
540 MONO_OBJECT_SETREF (thread, internal_thread, internal);
545 static MonoInternalThread*
546 create_internal_thread_object (void)
549 MonoInternalThread *thread;
552 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
553 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
554 /* only possible failure mode is OOM, from which we don't exect to recover */
555 mono_error_assert_ok (&error);
557 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
558 mono_coop_mutex_init_recursive (thread->synch_cs);
560 thread->apartment_state = ThreadApartmentState_Unknown;
561 thread->managed_id = get_next_managed_thread_id ();
562 if (mono_gc_is_moving ()) {
563 thread->thread_pinning_ref = thread;
564 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
567 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
569 thread->suspended = g_new0 (MonoOSEvent, 1);
570 mono_os_event_init (thread->suspended, TRUE);
576 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
580 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
581 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
582 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
587 g_assert (internal->native_handle);
589 res = SetThreadPriority (internal->native_handle, priority - 2);
591 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
592 #else /* HOST_WIN32 */
595 struct sched_param param;
598 tid = thread_get_tid (internal);
600 res = pthread_getschedparam (tid, &policy, ¶m);
602 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
604 #ifdef _POSIX_PRIORITY_SCHEDULING
607 /* Necessary to get valid priority range */
609 min = sched_get_priority_min (policy);
610 max = sched_get_priority_max (policy);
612 if (max > 0 && min >= 0 && max > min) {
613 double srange, drange, sposition, dposition;
614 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
616 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
617 dposition = (sposition / srange) * drange;
618 param.sched_priority = (int)(dposition + min);
625 param.sched_priority = 50;
631 param.sched_priority = 0;
634 g_warning ("%s: unknown policy %d", __func__, policy);
639 res = pthread_setschedparam (tid, policy, ¶m);
642 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
645 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
647 #endif /* HOST_WIN32 */
651 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
654 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
656 MonoThreadInfo *info;
657 MonoInternalThread *internal;
658 MonoDomain *domain, *root_domain;
662 info = mono_thread_info_current ();
665 internal = thread->internal_thread;
668 /* It is needed to store the MonoInternalThread on the MonoThreadInfo, because of the following case:
669 * - the MonoInternalThread TLS key is destroyed: set it to NULL
670 * - the MonoThreadInfo TLS key is destroyed: calls mono_thread_info_detach
671 * - it calls MonoThreadInfoCallbacks.thread_detach
672 * - mono_thread_internal_current returns NULL -> fails to detach the MonoInternalThread. */
673 mono_thread_info_set_internal_thread_gchandle (info, mono_gchandle_new ((MonoObject*) internal, FALSE));
675 internal->handle = mono_threads_open_thread_handle (info->handle);
677 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
679 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
680 internal->thread_info = info;
681 internal->small_id = info->small_id;
683 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
685 SET_CURRENT_OBJECT (internal);
687 domain = mono_object_domain (thread);
689 mono_thread_push_appdomain_ref (domain);
690 if (!mono_domain_set (domain, force_domain)) {
691 mono_thread_pop_appdomain_ref ();
695 mono_threads_lock ();
697 if (threads_starting_up)
698 mono_g_hash_table_remove (threads_starting_up, thread);
700 if (shutting_down && !force_attach) {
701 mono_threads_unlock ();
702 mono_thread_pop_appdomain_ref ();
707 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
710 /* We don't need to duplicate thread->handle, because it is
711 * only closed when the thread object is finalized by the GC. */
712 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
714 /* We have to do this here because mono_thread_start_cb
715 * requires that root_domain_thread is set up. */
716 if (thread_static_info.offset || thread_static_info.idx > 0) {
717 /* get the current allocated size */
718 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
719 mono_alloc_static_data (&internal->static_data, offset, TRUE);
722 mono_threads_unlock ();
724 root_domain = mono_get_root_domain ();
726 g_assert (!internal->root_domain_thread);
727 if (domain != root_domain)
728 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
730 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
732 if (domain != root_domain)
733 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
735 set_current_thread_for_domain (domain, internal, thread);
737 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
743 mono_thread_detach_internal (MonoInternalThread *thread)
747 g_assert (thread != NULL);
748 SET_CURRENT_OBJECT (thread);
750 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
753 mono_w32mutex_abandon ();
756 if (thread->abort_state_handle) {
757 mono_gchandle_free (thread->abort_state_handle);
758 thread->abort_state_handle = 0;
761 thread->abort_exc = NULL;
762 thread->current_appcontext = NULL;
765 * Prevent race condition between execution of this method and runtime shutdown.
766 * Adding runtime thread to the joinable threads list will make sure runtime shutdown
767 * won't complete until added runtime thread have exited. Owner of threads attached to the
768 * runtime but not identified as runtime threads needs to make sure thread detach calls won't
769 * race with runtime shutdown.
771 mono_threads_add_joinable_runtime_thread (thread->thread_info);
774 * thread->synch_cs can be NULL if this was called after
775 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
776 * This can happen only during shutdown.
777 * The shutting_down flag is not always set, so we can't assert on it.
779 if (thread->synch_cs)
780 LOCK_THREAD (thread);
782 thread->state |= ThreadState_Stopped;
783 thread->state &= ~ThreadState_Background;
785 if (thread->synch_cs)
786 UNLOCK_THREAD (thread);
789 An interruption request has leaked to cleanup. Adjust the global counter.
791 This can happen is the abort source thread finds the abortee (this) thread
792 in unmanaged code. If this thread never trips back to managed code or check
793 the local flag it will be left set and positively unbalance the global counter.
795 Leaving the counter unbalanced will cause a performance degradation since all threads
796 will now keep checking their local flags all the time.
798 mono_thread_clear_interruption_requested (thread);
800 mono_threads_lock ();
804 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
805 /* We have to check whether the thread object for the
806 * tid is still the same in the table because the
807 * thread might have been destroyed and the tid reused
808 * in the meantime, in which case the tid would be in
809 * the table, but with another thread object.
813 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
817 mono_threads_unlock ();
819 /* Don't close the handle here, wait for the object finalizer
820 * to do it. Otherwise, the following race condition applies:
822 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
824 * 2) Some other handle is reassigned the same slot
826 * 3) Another thread tries to join the first thread, and
827 * blocks waiting for the reassigned handle to be signalled
828 * (which might never happen). This is possible, because the
829 * thread calling Join() still has a reference to the first
833 /* if the thread is not in the hash it has been removed already */
835 mono_domain_unset ();
836 mono_memory_barrier ();
838 if (mono_thread_cleanup_fn)
839 mono_thread_cleanup_fn (thread_get_tid (thread));
844 mono_release_type_locks (thread);
846 /* Can happen when we attach the profiler helper thread in order to heapshot. */
847 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
848 MONO_PROFILER_RAISE (thread_stopped, (thread->tid));
850 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
853 * This will signal async signal handlers that the thread has exited.
854 * The profiler callback needs this to be set, so it cannot be done earlier.
856 mono_domain_unset ();
857 mono_memory_barrier ();
859 if (thread == mono_thread_internal_current ())
860 mono_thread_pop_appdomain_ref ();
862 mono_free_static_data (thread->static_data);
863 thread->static_data = NULL;
864 ref_stack_destroy (thread->appdomain_refs);
865 thread->appdomain_refs = NULL;
867 g_assert (thread->suspended);
868 mono_os_event_destroy (thread->suspended);
869 g_free (thread->suspended);
870 thread->suspended = NULL;
872 if (mono_thread_cleanup_fn)
873 mono_thread_cleanup_fn (thread_get_tid (thread));
875 mono_memory_barrier ();
877 if (mono_gc_is_moving ()) {
878 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
879 thread->thread_pinning_ref = NULL;
883 SET_CURRENT_OBJECT (NULL);
884 mono_domain_unset ();
886 mono_thread_info_unset_internal_thread_gchandle ((MonoThreadInfo*) thread->thread_info);
888 /* Don't need to close the handle to this thread, even though we took a
889 * reference in mono_thread_attach (), because the GC will do it
890 * when the Thread object is finalised.
897 MonoObject *start_delegate;
898 MonoObject *start_delegate_arg;
899 MonoThreadStart start_func;
900 gpointer start_func_arg;
901 gboolean force_attach;
903 MonoCoopSem registered;
906 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
909 MonoThreadStart start_func;
910 void *start_func_arg;
913 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
917 MonoInternalThread *internal;
918 MonoObject *start_delegate;
919 MonoObject *start_delegate_arg;
922 thread = start_info->thread;
923 internal = thread->internal_thread;
924 domain = mono_object_domain (start_info->thread);
926 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
928 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
929 start_info->failed = TRUE;
931 mono_coop_sem_post (&start_info->registered);
933 if (InterlockedDecrement (&start_info->ref) == 0) {
934 mono_coop_sem_destroy (&start_info->registered);
941 mono_thread_internal_set_priority (internal, internal->priority);
945 start_delegate = start_info->start_delegate;
946 start_delegate_arg = start_info->start_delegate_arg;
947 start_func = start_info->start_func;
948 start_func_arg = start_info->start_func_arg;
950 /* This MUST be called before any managed code can be
951 * executed, as it calls the callback function that (for the
952 * jit) sets the lmf marker.
955 if (mono_thread_start_cb)
956 mono_thread_start_cb (tid, stack_ptr, start_func);
958 /* On 2.0 profile (and higher), set explicitly since state might have been
960 if (internal->apartment_state == ThreadApartmentState_Unknown)
961 internal->apartment_state = ThreadApartmentState_MTA;
963 mono_thread_init_apartment_state ();
965 /* Let the thread that called Start() know we're ready */
966 mono_coop_sem_post (&start_info->registered);
968 if (InterlockedDecrement (&start_info->ref) == 0) {
969 mono_coop_sem_destroy (&start_info->registered);
973 /* start_info is not valid anymore */
977 * Call this after calling start_notify, since the profiler callback might want
978 * to lock the thread, and the lock is held by thread_start () which waits for
981 MONO_PROFILER_RAISE (thread_started, (tid));
983 /* if the name was set before starting, we didn't invoke the profiler callback */
984 if (internal->name) {
985 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
986 MONO_PROFILER_RAISE (thread_name, (internal->tid, tname));
987 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
991 /* start_func is set only for unmanaged start functions */
993 start_func (start_func_arg);
997 g_assert (start_delegate != NULL);
999 /* we may want to handle the exception here. See comment below on unhandled exceptions */
1000 args [0] = (gpointer) start_delegate_arg;
1001 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
1003 if (!mono_error_ok (&error)) {
1004 MonoException *ex = mono_error_convert_to_exception (&error);
1006 g_assert (ex != NULL);
1007 MonoClass *klass = mono_object_get_class (&ex->object);
1008 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
1009 !is_threadabort_exception (klass)) {
1010 mono_unhandled_exception (&ex->object);
1011 mono_invoke_unhandled_exception_hook (&ex->object);
1012 g_assert_not_reached ();
1015 mono_error_cleanup (&error);
1019 /* If the thread calls ExitThread at all, this remaining code
1020 * will not be executed, but the main thread will eventually
1021 * call mono_thread_detach_internal() on this thread's behalf.
1024 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
1026 /* Do any cleanup needed for apartment state. This
1027 * cannot be done in mono_thread_detach_internal since
1028 * mono_thread_detach_internal could be called for a
1029 * thread other than the current thread.
1030 * mono_thread_cleanup_apartment_state cleans up apartment
1031 * for the current thead */
1032 mono_thread_cleanup_apartment_state ();
1034 mono_thread_detach_internal (internal);
1040 start_wrapper (gpointer data)
1042 StartInfo *start_info;
1043 MonoThreadInfo *info;
1046 start_info = (StartInfo*) data;
1047 g_assert (start_info);
1049 info = mono_thread_info_attach ();
1050 info->runtime_thread = TRUE;
1052 /* Run the actual main function of the thread */
1053 res = start_wrapper_internal (start_info, info->stack_end);
1055 mono_thread_info_exit (res);
1057 g_assert_not_reached ();
1063 * Common thread creation code.
1064 * LOCKING: Acquires the threads lock.
1067 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
1068 MonoThreadCreateFlags flags, MonoError *error)
1070 StartInfo *start_info = NULL;
1071 MonoNativeThreadId tid;
1073 gsize stack_set_size;
1076 g_assert (!start_func && !start_func_arg);
1078 g_assert (!start_delegate);
1080 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
1081 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
1082 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1084 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
1085 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
1086 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1090 * Join joinable threads to prevent running out of threads since the finalizer
1091 * thread might be blocked/backlogged.
1093 mono_threads_join_threads ();
1097 mono_threads_lock ();
1098 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
1099 mono_threads_unlock ();
1102 if (threads_starting_up == NULL) {
1103 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
1105 mono_g_hash_table_insert (threads_starting_up, thread, thread);
1106 mono_threads_unlock ();
1108 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
1109 if (internal->threadpool_thread)
1110 mono_thread_set_state (internal, ThreadState_Background);
1112 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
1114 start_info = g_new0 (StartInfo, 1);
1115 start_info->ref = 2;
1116 start_info->thread = thread;
1117 start_info->start_delegate = start_delegate;
1118 start_info->start_delegate_arg = thread->start_obj;
1119 start_info->start_func = start_func;
1120 start_info->start_func_arg = start_func_arg;
1121 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
1122 start_info->failed = FALSE;
1123 mono_coop_sem_init (&start_info->registered, 0);
1125 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
1126 stack_set_size = default_stacksize_for_thread (internal);
1130 if (!mono_thread_platform_create_thread ((MonoThreadStart)start_wrapper, start_info, &stack_set_size, &tid)) {
1131 /* The thread couldn't be created, so set an exception */
1132 mono_threads_lock ();
1133 mono_g_hash_table_remove (threads_starting_up, thread);
1134 mono_threads_unlock ();
1135 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
1136 /* ref is not going to be decremented in start_wrapper_internal */
1137 InterlockedDecrement (&start_info->ref);
1142 internal->stack_size = (int) stack_set_size;
1144 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
1147 * Wait for the thread to set up its TLS data etc, so
1148 * theres no potential race condition if someone tries
1149 * to look up the data believing the thread has
1153 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
1155 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));
1157 ret = !start_info->failed;
1160 if (InterlockedDecrement (&start_info->ref) == 0) {
1161 mono_coop_sem_destroy (&start_info->registered);
1162 g_free (start_info);
1169 * mono_thread_new_init:
1172 mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1174 if (mono_thread_start_cb) {
1175 mono_thread_start_cb (tid, stack_start, func);
1180 * mono_threads_set_default_stacksize:
1183 mono_threads_set_default_stacksize (guint32 stacksize)
1185 default_stacksize = stacksize;
1189 * mono_threads_get_default_stacksize:
1192 mono_threads_get_default_stacksize (void)
1194 return default_stacksize;
1198 * mono_thread_create_internal:
1200 * ARG should not be a GC reference.
1203 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1206 MonoInternalThread *internal;
1211 internal = create_internal_thread_object ();
1213 thread = create_thread_object (domain, internal);
1215 LOCK_THREAD (internal);
1217 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1219 UNLOCK_THREAD (internal);
1221 return_val_if_nok (error, NULL);
1226 * mono_thread_create:
1229 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1232 if (!mono_thread_create_checked (domain, func, arg, &error))
1233 mono_error_cleanup (&error);
1237 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1239 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1243 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1245 MonoInternalThread *internal;
1247 MonoThreadInfo *info;
1248 MonoNativeThreadId tid;
1250 if (mono_thread_internal_current_is_attached ()) {
1251 if (domain != mono_domain_get ())
1252 mono_domain_set (domain, TRUE);
1253 /* Already attached */
1254 return mono_thread_current ();
1257 info = mono_thread_info_attach ();
1260 tid=mono_native_thread_id_get ();
1262 internal = create_internal_thread_object ();
1264 thread = create_thread_object (domain, internal);
1266 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1267 /* Mono is shutting down, so just wait for the end */
1269 mono_thread_info_sleep (10000, NULL);
1272 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1274 if (mono_thread_attach_cb)
1275 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), info->stack_end);
1277 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1278 if (!mono_thread_info_current ()->tools_thread)
1279 MONO_PROFILER_RAISE (thread_started, (MONO_NATIVE_THREAD_ID_TO_UINT (tid)));
1285 * mono_thread_attach:
1288 mono_thread_attach (MonoDomain *domain)
1290 return mono_thread_attach_full (domain, FALSE);
1294 * mono_thread_detach:
1297 mono_thread_detach (MonoThread *thread)
1300 mono_thread_detach_internal (thread->internal_thread);
1304 * mono_thread_detach_if_exiting:
1306 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1307 * This should be used at the end of embedding code which calls into managed code, and which
1308 * can be called from pthread dtors, like <code>dealloc:</code> implementations in Objective-C.
1311 mono_thread_detach_if_exiting (void)
1313 if (mono_thread_info_is_exiting ()) {
1314 MonoInternalThread *thread;
1316 thread = mono_thread_internal_current ();
1318 mono_thread_detach_internal (thread);
1319 mono_thread_info_detach ();
1327 mono_thread_internal_current_is_attached (void)
1329 MonoInternalThread *internal;
1331 internal = GET_CURRENT_OBJECT ();
1342 mono_thread_exit (void)
1344 MonoInternalThread *thread = mono_thread_internal_current ();
1346 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1348 mono_thread_detach_internal (thread);
1350 /* we could add a callback here for embedders to use. */
1351 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1352 exit (mono_environment_exitcode_get ());
1354 mono_thread_info_exit (0);
1358 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1360 MonoInternalThread *internal;
1362 internal = create_internal_thread_object ();
1364 internal->state = ThreadState_Unstarted;
1366 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1370 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1372 return mono_thread_current ();
1376 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1380 MonoInternalThread *internal;
1383 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1385 if (!this_obj->internal_thread)
1386 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1387 internal = this_obj->internal_thread;
1389 LOCK_THREAD (internal);
1391 if ((internal->state & ThreadState_Unstarted) == 0) {
1392 UNLOCK_THREAD (internal);
1393 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1397 if ((internal->state & ThreadState_Aborted) != 0) {
1398 UNLOCK_THREAD (internal);
1402 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1404 mono_error_cleanup (&error);
1405 UNLOCK_THREAD (internal);
1409 internal->state &= ~ThreadState_Unstarted;
1411 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1413 UNLOCK_THREAD (internal);
1414 return internal->handle;
1418 * This is called from the finalizer of the internal thread object.
1421 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1423 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1426 * Since threads keep a reference to their thread object while running, by
1427 * the time this function is called, the thread has already exited/detached,
1428 * i.e. mono_thread_detach_internal () has ran. The exception is during
1429 * shutdown, when mono_thread_detach_internal () can be called after this.
1431 if (this_obj->handle) {
1432 mono_threads_close_thread_handle (this_obj->handle);
1433 this_obj->handle = NULL;
1437 CloseHandle (this_obj->native_handle);
1440 if (this_obj->synch_cs) {
1441 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1442 this_obj->synch_cs = NULL;
1443 mono_coop_mutex_destroy (synch_cs);
1447 if (this_obj->name) {
1448 void *name = this_obj->name;
1449 this_obj->name = NULL;
1455 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1458 MonoInternalThread *thread = mono_thread_internal_current ();
1460 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1462 if (mono_thread_current_check_pending_interrupt ())
1466 gboolean alerted = FALSE;
1468 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1470 res = mono_thread_info_sleep (ms, &alerted);
1472 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1475 MonoException* exc = mono_thread_execute_interruption ();
1477 mono_raise_exception (exc);
1479 // FIXME: !MONO_INFINITE_WAIT
1480 if (ms != MONO_INFINITE_WAIT)
1489 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1494 ves_icall_System_Threading_Thread_GetDomainID (void)
1496 return mono_domain_get()->domain_id;
1500 ves_icall_System_Threading_Thread_Yield (void)
1502 return mono_thread_info_yield ();
1506 * mono_thread_get_name:
1508 * Return the name of the thread. NAME_LEN is set to the length of the name.
1509 * Return NULL if the thread has no name. The returned memory is owned by the
1513 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1517 LOCK_THREAD (this_obj);
1519 if (!this_obj->name) {
1523 *name_len = this_obj->name_len;
1524 res = g_new (gunichar2, this_obj->name_len);
1525 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1528 UNLOCK_THREAD (this_obj);
1534 * mono_thread_get_name_utf8:
1535 * \returns the name of the thread in UTF-8.
1536 * Return NULL if the thread has no name.
1537 * The returned memory is owned by the caller.
1540 mono_thread_get_name_utf8 (MonoThread *thread)
1545 MonoInternalThread *internal = thread->internal_thread;
1546 if (internal == NULL)
1549 LOCK_THREAD (internal);
1551 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1553 UNLOCK_THREAD (internal);
1559 * mono_thread_get_managed_id:
1560 * \returns the \c Thread.ManagedThreadId value of \p thread.
1561 * Returns \c -1 if \p thread is NULL.
1564 mono_thread_get_managed_id (MonoThread *thread)
1569 MonoInternalThread *internal = thread->internal_thread;
1570 if (internal == NULL)
1573 int32_t id = internal->managed_id;
1579 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1584 error_init (&error);
1586 LOCK_THREAD (this_obj);
1588 if (!this_obj->name)
1591 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1593 UNLOCK_THREAD (this_obj);
1595 if (mono_error_set_pending_exception (&error))
1602 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1604 MonoNativeThreadId tid = 0;
1606 LOCK_THREAD (this_obj);
1611 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1612 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1613 UNLOCK_THREAD (this_obj);
1615 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1618 if (this_obj->name) {
1619 g_free (this_obj->name);
1620 this_obj->name_len = 0;
1623 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1624 this_obj->name_len = mono_string_length (name);
1627 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1630 this_obj->name = NULL;
1632 if (!(this_obj->state & ThreadState_Stopped))
1633 tid = thread_get_tid (this_obj);
1635 UNLOCK_THREAD (this_obj);
1637 if (this_obj->name && tid) {
1638 char *tname = mono_string_to_utf8_checked (name, error);
1639 return_if_nok (error);
1640 MONO_PROFILER_RAISE (thread_name, ((uintptr_t)tid, tname));
1641 mono_native_thread_set_name (tid, tname);
1647 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1650 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1651 mono_error_set_pending_exception (&error);
1655 * ves_icall_System_Threading_Thread_GetPriority_internal:
1656 * @param this_obj: The MonoInternalThread on which to operate.
1658 * Gets the priority of the given thread.
1659 * @return: The priority of the given thread.
1662 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1665 MonoInternalThread *internal = this_obj->internal_thread;
1667 LOCK_THREAD (internal);
1668 priority = internal->priority;
1669 UNLOCK_THREAD (internal);
1675 * ves_icall_System_Threading_Thread_SetPriority_internal:
1676 * @param this_obj: The MonoInternalThread on which to operate.
1677 * @param priority: The priority to set.
1679 * Sets the priority of the given thread.
1682 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1684 MonoInternalThread *internal = this_obj->internal_thread;
1686 LOCK_THREAD (internal);
1687 internal->priority = priority;
1688 if (internal->thread_info != NULL)
1689 mono_thread_internal_set_priority (internal, priority);
1690 UNLOCK_THREAD (internal);
1693 /* If the array is already in the requested domain, we just return it,
1694 otherwise we return a copy in that domain. */
1696 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1704 if (mono_object_domain (arr) == domain)
1707 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1708 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1713 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1716 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1717 mono_error_set_pending_exception (&error);
1722 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1725 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1726 mono_error_set_pending_exception (&error);
1731 * mono_thread_current:
1734 mono_thread_current (void)
1736 MonoDomain *domain = mono_domain_get ();
1737 MonoInternalThread *internal = mono_thread_internal_current ();
1738 MonoThread **current_thread_ptr;
1740 g_assert (internal);
1741 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1743 if (!*current_thread_ptr) {
1744 g_assert (domain != mono_get_root_domain ());
1745 *current_thread_ptr = create_thread_object (domain, internal);
1747 return *current_thread_ptr;
1750 /* Return the thread object belonging to INTERNAL in the current domain */
1752 mono_thread_current_for_thread (MonoInternalThread *internal)
1754 MonoDomain *domain = mono_domain_get ();
1755 MonoThread **current_thread_ptr;
1757 g_assert (internal);
1758 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1760 if (!*current_thread_ptr) {
1761 g_assert (domain != mono_get_root_domain ());
1762 *current_thread_ptr = create_thread_object (domain, internal);
1764 return *current_thread_ptr;
1768 mono_thread_internal_current (void)
1770 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1771 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1775 static MonoThreadInfoWaitRet
1776 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1779 MonoThreadInfoWaitRet ret;
1786 start = (ms == -1) ? 0 : mono_msec_ticks ();
1789 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1792 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1795 exc = mono_thread_execute_interruption ();
1797 mono_error_set_exception_instance (error, exc);
1804 /* Re-calculate ms according to the time passed */
1805 diff_ms = (gint32)(mono_msec_ticks () - start);
1806 if (diff_ms >= ms) {
1807 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1810 wait = ms - diff_ms;
1817 ves_icall_System_Threading_Thread_Join_internal (MonoThread *this_obj, int ms)
1819 MonoInternalThread *thread = this_obj->internal_thread;
1820 MonoThreadHandle *handle = thread->handle;
1821 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1825 if (mono_thread_current_check_pending_interrupt ())
1828 LOCK_THREAD (thread);
1830 if ((thread->state & ThreadState_Unstarted) != 0) {
1831 UNLOCK_THREAD (thread);
1833 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1837 UNLOCK_THREAD (thread);
1840 ms = MONO_INFINITE_WAIT;
1841 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1843 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1845 ret = mono_join_uninterrupted (handle, ms, &error);
1847 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1849 mono_error_set_pending_exception (&error);
1851 if (ret == MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1852 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1854 /* Wait for the thread to really exit */
1855 MonoNativeThreadId tid = thread_get_tid (thread);
1856 mono_thread_join (tid);
1861 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1866 #define MANAGED_WAIT_FAILED 0x7fffffff
1869 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1871 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1872 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1873 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1874 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1875 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1876 return WAIT_IO_COMPLETION;
1877 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1878 return WAIT_TIMEOUT;
1879 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1880 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1881 return MANAGED_WAIT_FAILED;
1883 g_error ("%s: unknown val value %d", __func__, val);
1888 ves_icall_System_Threading_WaitHandle_Wait_internal (gpointer *handles, gint32 numhandles, MonoBoolean waitall, gint32 timeout, MonoError *error)
1890 MonoW32HandleWaitRet ret;
1891 MonoInternalThread *thread;
1894 guint32 timeoutLeft;
1896 /* Do this WaitSleepJoin check before creating objects */
1897 if (mono_thread_current_check_pending_interrupt ())
1898 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1900 thread = mono_thread_internal_current ();
1902 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1905 timeout = MONO_INFINITE_WAIT;
1906 if (timeout != MONO_INFINITE_WAIT)
1907 start = mono_msec_ticks ();
1909 timeoutLeft = timeout;
1914 if (numhandles != 1)
1915 ret = mono_w32handle_convert_wait_ret (mono_win32_wait_for_multiple_objects_ex(numhandles, handles, waitall, timeoutLeft, TRUE), numhandles);
1917 ret = mono_w32handle_convert_wait_ret (mono_win32_wait_for_single_object_ex (handles [0], timeoutLeft, TRUE), 1);
1919 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1920 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, timeoutLeft, TRUE);
1921 #endif /* HOST_WIN32 */
1924 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1927 exc = mono_thread_execute_interruption ();
1929 mono_error_set_exception_instance (error, exc);
1933 if (timeout != MONO_INFINITE_WAIT) {
1936 elapsed = mono_msec_ticks () - start;
1937 if (elapsed >= timeout) {
1938 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1942 timeoutLeft = timeout - elapsed;
1946 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1948 return map_native_wait_result_to_managed (ret, numhandles);
1952 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (gpointer toSignal, gpointer toWait, gint32 ms, MonoError *error)
1954 MonoW32HandleWaitRet ret;
1955 MonoInternalThread *thread = mono_thread_internal_current ();
1958 ms = MONO_INFINITE_WAIT;
1960 if (mono_thread_current_check_pending_interrupt ())
1961 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1963 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1967 ret = mono_w32handle_convert_wait_ret (mono_win32_signal_object_and_wait (toSignal, toWait, ms, TRUE), 1);
1969 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1973 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1975 return map_native_wait_result_to_managed (ret, 1);
1978 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1980 return InterlockedIncrement (location);
1983 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1985 #if SIZEOF_VOID_P == 4
1986 if (G_UNLIKELY ((size_t)location & 0x7)) {
1988 mono_interlocked_lock ();
1991 mono_interlocked_unlock ();
1995 return InterlockedIncrement64 (location);
1998 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2000 return InterlockedDecrement(location);
2003 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2005 #if SIZEOF_VOID_P == 4
2006 if (G_UNLIKELY ((size_t)location & 0x7)) {
2008 mono_interlocked_lock ();
2011 mono_interlocked_unlock ();
2015 return InterlockedDecrement64 (location);
2018 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2020 return InterlockedExchange(location, value);
2023 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2026 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2027 mono_gc_wbarrier_generic_nostore (location);
2031 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2033 return InterlockedExchangePointer(location, value);
2036 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2038 IntFloatUnion val, ret;
2041 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2047 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2049 #if SIZEOF_VOID_P == 4
2050 if (G_UNLIKELY ((size_t)location & 0x7)) {
2052 mono_interlocked_lock ();
2055 mono_interlocked_unlock ();
2059 return InterlockedExchange64 (location, value);
2063 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2065 LongDoubleUnion val, ret;
2068 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2073 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2075 return InterlockedCompareExchange(location, value, comparand);
2078 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2080 gint32 r = InterlockedCompareExchange(location, value, comparand);
2081 *success = r == comparand;
2085 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2088 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2089 mono_gc_wbarrier_generic_nostore (location);
2093 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2095 return InterlockedCompareExchangePointer(location, value, comparand);
2098 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2100 IntFloatUnion val, ret, cmp;
2103 cmp.fval = comparand;
2104 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2110 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2112 #if SIZEOF_VOID_P == 8
2113 LongDoubleUnion val, comp, ret;
2116 comp.fval = comparand;
2117 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2123 mono_interlocked_lock ();
2125 if (old == comparand)
2127 mono_interlocked_unlock ();
2134 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2136 #if SIZEOF_VOID_P == 4
2137 if (G_UNLIKELY ((size_t)location & 0x7)) {
2139 mono_interlocked_lock ();
2141 if (old == comparand)
2143 mono_interlocked_unlock ();
2147 return InterlockedCompareExchange64 (location, value, comparand);
2151 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2154 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2155 mono_gc_wbarrier_generic_nostore (location);
2160 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2163 MONO_CHECK_NULL (location, NULL);
2164 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2165 mono_gc_wbarrier_generic_nostore (location);
2170 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2172 return InterlockedAdd (location, value);
2176 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2178 #if SIZEOF_VOID_P == 4
2179 if (G_UNLIKELY ((size_t)location & 0x7)) {
2181 mono_interlocked_lock ();
2184 mono_interlocked_unlock ();
2188 return InterlockedAdd64 (location, value);
2192 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2194 #if SIZEOF_VOID_P == 4
2195 if (G_UNLIKELY ((size_t)location & 0x7)) {
2197 mono_interlocked_lock ();
2199 mono_interlocked_unlock ();
2203 return InterlockedRead64 (location);
2207 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2209 mono_memory_barrier ();
2213 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2215 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2217 if (state & ThreadState_Background) {
2218 /* If the thread changes the background mode, the main thread has to
2219 * be notified, since it has to rebuild the list of threads to
2222 mono_os_event_set (&background_change_event);
2227 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2229 mono_thread_set_state (this_obj, (MonoThreadState)state);
2231 if (state & ThreadState_Background) {
2232 /* If the thread changes the background mode, the main thread has to
2233 * be notified, since it has to rebuild the list of threads to
2236 mono_os_event_set (&background_change_event);
2241 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2245 LOCK_THREAD (this_obj);
2247 state = this_obj->state;
2249 UNLOCK_THREAD (this_obj);
2254 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2256 MonoInternalThread *current;
2258 MonoInternalThread *thread = this_obj->internal_thread;
2260 LOCK_THREAD (thread);
2262 current = mono_thread_internal_current ();
2264 thread->thread_interrupt_requested = TRUE;
2265 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2267 UNLOCK_THREAD (thread);
2270 async_abort_internal (thread, FALSE);
2275 * mono_thread_current_check_pending_interrupt:
2276 * Checks if there's a interruption request and set the pending exception if so.
2277 * \returns true if a pending exception was set
2280 mono_thread_current_check_pending_interrupt (void)
2282 MonoInternalThread *thread = mono_thread_internal_current ();
2283 gboolean throw_ = FALSE;
2285 LOCK_THREAD (thread);
2287 if (thread->thread_interrupt_requested) {
2289 thread->thread_interrupt_requested = FALSE;
2292 UNLOCK_THREAD (thread);
2295 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2300 request_thread_abort (MonoInternalThread *thread, MonoObject *state, gboolean appdomain_unload)
2302 LOCK_THREAD (thread);
2304 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2306 UNLOCK_THREAD (thread);
2310 if ((thread->state & ThreadState_Unstarted) != 0) {
2311 thread->state |= ThreadState_Aborted;
2312 UNLOCK_THREAD (thread);
2316 thread->state |= ThreadState_AbortRequested;
2317 if (appdomain_unload)
2318 thread->flags |= MONO_THREAD_FLAG_APPDOMAIN_ABORT;
2320 thread->flags &= ~MONO_THREAD_FLAG_APPDOMAIN_ABORT;
2322 if (thread->abort_state_handle)
2323 mono_gchandle_free (thread->abort_state_handle);
2325 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2326 g_assert (thread->abort_state_handle);
2328 thread->abort_state_handle = 0;
2330 thread->abort_exc = NULL;
2332 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));
2334 /* During shutdown, we can't wait for other threads */
2336 /* Make sure the thread is awake */
2337 mono_thread_resume (thread);
2339 UNLOCK_THREAD (thread);
2344 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2346 if (!request_thread_abort (thread, state, FALSE))
2349 if (thread == mono_thread_internal_current ()) {
2351 self_abort_internal (&error);
2352 mono_error_set_pending_exception (&error);
2354 async_abort_internal (thread, TRUE);
2359 * mono_thread_internal_abort:
2360 * Request thread \p thread to be aborted.
2361 * \p thread MUST NOT be the current thread.
2364 mono_thread_internal_abort (MonoInternalThread *thread, gboolean appdomain_unload)
2366 g_assert (thread != mono_thread_internal_current ());
2368 if (!request_thread_abort (thread, NULL, appdomain_unload))
2370 async_abort_internal (thread, TRUE);
2374 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2376 MonoInternalThread *thread = mono_thread_internal_current ();
2377 gboolean was_aborting, is_domain_abort;
2379 LOCK_THREAD (thread);
2380 was_aborting = thread->state & ThreadState_AbortRequested;
2381 is_domain_abort = thread->flags & MONO_THREAD_FLAG_APPDOMAIN_ABORT;
2383 if (was_aborting && !is_domain_abort)
2384 thread->state &= ~ThreadState_AbortRequested;
2385 UNLOCK_THREAD (thread);
2387 if (!was_aborting) {
2388 const char *msg = "Unable to reset abort because no abort was requested";
2389 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2391 } else if (is_domain_abort) {
2392 /* Silently ignore abort resets in unloading appdomains */
2396 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2397 thread->abort_exc = NULL;
2398 if (thread->abort_state_handle) {
2399 mono_gchandle_free (thread->abort_state_handle);
2400 /* This is actually not necessary - the handle
2401 only counts if the exception is set */
2402 thread->abort_state_handle = 0;
2407 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2409 LOCK_THREAD (thread);
2411 thread->state &= ~ThreadState_AbortRequested;
2413 if (thread->abort_exc) {
2414 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2415 thread->abort_exc = NULL;
2416 if (thread->abort_state_handle) {
2417 mono_gchandle_free (thread->abort_state_handle);
2418 /* This is actually not necessary - the handle
2419 only counts if the exception is set */
2420 thread->abort_state_handle = 0;
2424 UNLOCK_THREAD (thread);
2428 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2431 MonoInternalThread *thread = this_obj->internal_thread;
2432 MonoObject *state, *deserialized = NULL;
2435 if (!thread->abort_state_handle)
2438 state = mono_gchandle_get_target (thread->abort_state_handle);
2441 domain = mono_domain_get ();
2442 if (mono_object_domain (state) == domain)
2445 deserialized = mono_object_xdomain_representation (state, domain, &error);
2447 if (!deserialized) {
2448 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2449 if (!is_ok (&error)) {
2450 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2451 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2453 mono_set_pending_exception (invalid_op_exc);
2457 return deserialized;
2461 mono_thread_suspend (MonoInternalThread *thread)
2463 LOCK_THREAD (thread);
2465 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2467 UNLOCK_THREAD (thread);
2471 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2473 UNLOCK_THREAD (thread);
2477 thread->state |= ThreadState_SuspendRequested;
2478 mono_os_event_reset (thread->suspended);
2480 if (thread == mono_thread_internal_current ()) {
2481 /* calls UNLOCK_THREAD (thread) */
2482 self_suspend_internal ();
2484 /* calls UNLOCK_THREAD (thread) */
2485 async_suspend_internal (thread, FALSE);
2492 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2494 if (!mono_thread_suspend (this_obj->internal_thread)) {
2495 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2500 /* LOCKING: LOCK_THREAD(thread) must be held */
2502 mono_thread_resume (MonoInternalThread *thread)
2504 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2505 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2506 thread->state &= ~ThreadState_SuspendRequested;
2507 mono_os_event_set (thread->suspended);
2511 if ((thread->state & ThreadState_Suspended) == 0 ||
2512 (thread->state & ThreadState_Unstarted) != 0 ||
2513 (thread->state & ThreadState_Aborted) != 0 ||
2514 (thread->state & ThreadState_Stopped) != 0)
2516 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2520 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2522 mono_os_event_set (thread->suspended);
2524 if (!thread->self_suspended) {
2525 UNLOCK_THREAD (thread);
2527 /* Awake the thread */
2528 if (!mono_thread_info_resume (thread_get_tid (thread)))
2531 LOCK_THREAD (thread);
2534 thread->state &= ~ThreadState_Suspended;
2540 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2542 if (!thread->internal_thread) {
2543 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2545 LOCK_THREAD (thread->internal_thread);
2546 if (!mono_thread_resume (thread->internal_thread))
2547 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2548 UNLOCK_THREAD (thread->internal_thread);
2553 mono_threads_is_critical_method (MonoMethod *method)
2555 switch (method->wrapper_type) {
2556 case MONO_WRAPPER_RUNTIME_INVOKE:
2557 case MONO_WRAPPER_XDOMAIN_INVOKE:
2558 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2565 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2570 if (mono_threads_is_critical_method (m)) {
2571 *((gboolean*)data) = TRUE;
2578 is_running_protected_wrapper (void)
2580 gboolean found = FALSE;
2581 mono_stack_walk (find_wrapper, &found);
2589 mono_thread_stop (MonoThread *thread)
2591 MonoInternalThread *internal = thread->internal_thread;
2593 if (!request_thread_abort (internal, NULL, FALSE))
2596 if (internal == mono_thread_internal_current ()) {
2598 self_abort_internal (&error);
2600 This function is part of the embeding API and has no way to return the exception
2601 to be thrown. So what we do is keep the old behavior and raise the exception.
2603 mono_error_raise_exception (&error); /* OK to throw, see note */
2605 async_abort_internal (internal, TRUE);
2610 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2612 gint8 tmp = *(volatile gint8 *)ptr;
2613 mono_memory_barrier ();
2618 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2620 gint16 tmp = *(volatile gint16 *)ptr;
2621 mono_memory_barrier ();
2626 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2628 gint32 tmp = *(volatile gint32 *)ptr;
2629 mono_memory_barrier ();
2634 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2636 gint64 tmp = *(volatile gint64 *)ptr;
2637 mono_memory_barrier ();
2642 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2644 volatile void *tmp = *(volatile void **)ptr;
2645 mono_memory_barrier ();
2646 return (void *) tmp;
2650 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2652 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2653 mono_memory_barrier ();
2654 return (MonoObject *) tmp;
2658 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2660 double tmp = *(volatile double *)ptr;
2661 mono_memory_barrier ();
2666 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2668 float tmp = *(volatile float *)ptr;
2669 mono_memory_barrier ();
2674 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2676 return InterlockedRead8 ((volatile gint8 *)ptr);
2680 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2682 return InterlockedRead16 ((volatile gint16 *)ptr);
2686 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2688 return InterlockedRead ((volatile gint32 *)ptr);
2692 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2694 #if SIZEOF_VOID_P == 4
2695 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2697 mono_interlocked_lock ();
2698 val = *(gint64*)ptr;
2699 mono_interlocked_unlock ();
2703 return InterlockedRead64 ((volatile gint64 *)ptr);
2707 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2709 return InterlockedReadPointer ((volatile gpointer *)ptr);
2713 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2717 #if SIZEOF_VOID_P == 4
2718 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2720 mono_interlocked_lock ();
2721 val = *(double*)ptr;
2722 mono_interlocked_unlock ();
2727 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2733 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2737 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2743 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2745 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2749 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2751 mono_memory_barrier ();
2752 *(volatile gint8 *)ptr = value;
2756 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2758 mono_memory_barrier ();
2759 *(volatile gint16 *)ptr = value;
2763 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2765 mono_memory_barrier ();
2766 *(volatile gint32 *)ptr = value;
2770 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2772 mono_memory_barrier ();
2773 *(volatile gint64 *)ptr = value;
2777 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2779 mono_memory_barrier ();
2780 *(volatile void **)ptr = value;
2784 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2786 mono_memory_barrier ();
2787 mono_gc_wbarrier_generic_store (ptr, value);
2791 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2793 mono_memory_barrier ();
2794 *(volatile double *)ptr = value;
2798 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2800 mono_memory_barrier ();
2801 *(volatile float *)ptr = value;
2805 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2807 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2811 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2813 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2817 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2819 InterlockedWrite ((volatile gint32 *)ptr, value);
2823 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2825 #if SIZEOF_VOID_P == 4
2826 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2827 mono_interlocked_lock ();
2828 *(gint64*)ptr = value;
2829 mono_interlocked_unlock ();
2834 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2838 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2840 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2844 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2848 #if SIZEOF_VOID_P == 4
2849 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2850 mono_interlocked_lock ();
2851 *(double*)ptr = value;
2852 mono_interlocked_unlock ();
2859 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2863 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2869 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2873 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2875 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2879 free_context (void *user_data)
2881 ContextStaticData *data = user_data;
2883 mono_threads_lock ();
2886 * There is no guarantee that, by the point this reference queue callback
2887 * has been invoked, the GC handle associated with the object will fail to
2888 * resolve as one might expect. So if we don't free and remove the GC
2889 * handle here, free_context_static_data_helper () could end up resolving
2890 * a GC handle to an actually-dead context which would contain a pointer
2891 * to an already-freed static data segment, resulting in a crash when
2894 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2896 mono_threads_unlock ();
2898 mono_gchandle_free (data->gc_handle);
2899 mono_free_static_data (data->static_data);
2904 mono_threads_register_app_context (MonoAppContext *ctx, MonoError *error)
2907 mono_threads_lock ();
2909 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2912 contexts = g_hash_table_new (NULL, NULL);
2915 context_queue = mono_gc_reference_queue_new (free_context);
2917 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2918 g_hash_table_insert (contexts, gch, gch);
2921 * We use this intermediate structure to contain a duplicate pointer to
2922 * the static data because we can't rely on being able to resolve the GC
2923 * handle in the reference queue callback.
2925 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2926 data->gc_handle = GPOINTER_TO_UINT (gch);
2929 context_adjust_static_data (ctx);
2930 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2932 mono_threads_unlock ();
2934 MONO_PROFILER_RAISE (context_loaded, (ctx));
2938 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContextHandle ctx, MonoError *error)
2941 mono_threads_register_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_register_app_context */
2945 mono_threads_release_app_context (MonoAppContext* ctx, MonoError *error)
2948 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2949 * cleanup in exceptional circumstances, we don't actually do any
2950 * cleanup work here. We instead do this via a reference queue.
2953 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2955 MONO_PROFILER_RAISE (context_unloaded, (ctx));
2959 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContextHandle ctx, MonoError *error)
2962 mono_threads_release_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_release_app_context */
2965 void mono_thread_init (MonoThreadStartCB start_cb,
2966 MonoThreadAttachCB attach_cb)
2968 mono_coop_mutex_init_recursive (&threads_mutex);
2970 mono_os_mutex_init_recursive(&interlocked_mutex);
2971 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2973 mono_os_event_init (&background_change_event, FALSE);
2975 mono_init_static_data_info (&thread_static_info);
2976 mono_init_static_data_info (&context_static_info);
2978 mono_thread_start_cb = start_cb;
2979 mono_thread_attach_cb = attach_cb;
2983 thread_attach (MonoThreadInfo *info)
2985 return mono_gc_thread_attach (info);
2989 thread_detach (MonoThreadInfo *info)
2991 MonoInternalThread *internal;
2994 /* If a delegate is passed to native code and invoked on a thread we dont
2995 * know about, marshal will register it with mono_threads_attach_coop, but
2996 * we have no way of knowing when that thread goes away. SGen has a TSD
2997 * so we assume that if the domain is still registered, we can detach
3002 if (!mono_thread_info_try_get_internal_thread_gchandle (info, &gchandle))
3005 internal = (MonoInternalThread*) mono_gchandle_get_target (gchandle);
3006 g_assert (internal);
3008 mono_gchandle_free (gchandle);
3010 mono_thread_detach_internal (internal);
3014 thread_detach_with_lock (MonoThreadInfo *info)
3016 mono_gc_thread_detach_with_lock (info);
3020 thread_in_critical_region (MonoThreadInfo *info)
3022 return mono_gc_thread_in_critical_region (info);
3026 ip_in_critical_region (MonoDomain *domain, gpointer ip)
3032 * We pass false for 'try_aot' so this becomes async safe.
3033 * It won't find aot methods whose jit info is not yet loaded,
3034 * so we preload their jit info in the JIT.
3036 ji = mono_jit_info_table_find_internal (domain, ip, FALSE, FALSE);
3040 method = mono_jit_info_get_method (ji);
3043 return mono_gc_is_critical_method (method);
3047 mono_thread_callbacks_init (void)
3049 MonoThreadInfoCallbacks cb;
3051 memset (&cb, 0, sizeof(cb));
3052 cb.thread_attach = thread_attach;
3053 cb.thread_detach = thread_detach;
3054 cb.thread_detach_with_lock = thread_detach_with_lock;
3055 cb.ip_in_critical_region = ip_in_critical_region;
3056 cb.thread_in_critical_region = thread_in_critical_region;
3057 mono_thread_info_callbacks_init (&cb);
3061 * mono_thread_cleanup:
3064 mono_thread_cleanup (void)
3066 mono_threads_join_threads ();
3068 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3069 /* The main thread must abandon any held mutexes (particularly
3070 * important for named mutexes as they are shared across
3071 * processes, see bug 74680.) This will happen when the
3072 * thread exits, but if it's not running in a subthread it
3073 * won't exit in time.
3075 mono_w32mutex_abandon ();
3079 /* This stuff needs more testing, it seems one of these
3080 * critical sections can be locked when mono_thread_cleanup is
3083 mono_coop_mutex_destroy (&threads_mutex);
3084 mono_os_mutex_destroy (&interlocked_mutex);
3085 mono_os_mutex_destroy (&delayed_free_table_mutex);
3086 mono_os_mutex_destroy (&small_id_mutex);
3087 mono_os_event_destroy (&background_change_event);
3092 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3094 mono_thread_cleanup_fn = func;
3098 * mono_thread_set_manage_callback:
3101 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3103 thread->internal_thread->manage_callback = func;
3107 static void print_tids (gpointer key, gpointer value, gpointer user)
3109 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3110 * sizeof(uint) and a cast to uint would overflow
3112 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3113 * print this as a pointer.
3115 g_message ("Waiting for: %p", key);
3120 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3121 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3126 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3129 MonoThreadInfoWaitRet ret;
3131 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3133 /* Add the thread state change event, so it wakes
3134 * up if a thread changes to background mode. */
3137 if (check_state_change)
3138 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3140 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3143 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3144 /* See the comment in build_wait_tids() */
3145 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3149 for( i = 0; i < wait->num; i++)
3150 mono_threads_close_thread_handle (wait->handles [i]);
3152 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3155 if (ret < wait->num) {
3156 MonoInternalThread *internal;
3158 internal = wait->threads [ret];
3160 mono_threads_lock ();
3161 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3162 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3163 mono_threads_unlock ();
3167 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3169 struct wait_data *wait=(struct wait_data *)user;
3171 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3172 MonoInternalThread *thread=(MonoInternalThread *)value;
3174 /* Ignore background threads, we abort them later */
3175 /* Do not lock here since it is not needed and the caller holds threads_lock */
3176 if (thread->state & ThreadState_Background) {
3177 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3178 return; /* just leave, ignore */
3181 if (mono_gc_is_finalizer_internal_thread (thread)) {
3182 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3186 if (thread == mono_thread_internal_current ()) {
3187 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3191 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3192 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3196 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3197 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3201 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3202 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3203 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3204 wait->threads[wait->num]=thread;
3207 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3209 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3214 /* Just ignore the rest, we can't do anything with
3221 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3223 struct wait_data *wait=(struct wait_data *)user;
3224 MonoNativeThreadId self = mono_native_thread_id_get ();
3225 MonoInternalThread *thread = (MonoInternalThread *)value;
3227 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3230 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3232 if (mono_gc_is_finalizer_internal_thread (thread))
3235 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3236 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3237 wait->threads[wait->num] = thread;
3240 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3241 mono_thread_internal_abort (thread, FALSE);
3248 * mono_threads_set_shutting_down:
3250 * Is called by a thread that wants to shut down Mono. If the runtime is already
3251 * shutting down, the calling thread is suspended/stopped, and this function never
3255 mono_threads_set_shutting_down (void)
3257 MonoInternalThread *current_thread = mono_thread_internal_current ();
3259 mono_threads_lock ();
3261 if (shutting_down) {
3262 mono_threads_unlock ();
3264 /* Make sure we're properly suspended/stopped */
3266 LOCK_THREAD (current_thread);
3268 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3269 UNLOCK_THREAD (current_thread);
3270 mono_thread_execute_interruption ();
3272 UNLOCK_THREAD (current_thread);
3275 /*since we're killing the thread, detach it.*/
3276 mono_thread_detach_internal (current_thread);
3278 /* Wake up other threads potentially waiting for us */
3279 mono_thread_info_exit (0);
3281 shutting_down = TRUE;
3283 /* Not really a background state change, but this will
3284 * interrupt the main thread if it is waiting for all
3285 * the other threads.
3287 mono_os_event_set (&background_change_event);
3289 mono_threads_unlock ();
3294 * mono_thread_manage:
3297 mono_thread_manage (void)
3299 struct wait_data wait_data;
3300 struct wait_data *wait = &wait_data;
3302 memset (wait, 0, sizeof (struct wait_data));
3303 /* join each thread that's still running */
3304 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3306 mono_threads_lock ();
3308 THREAD_DEBUG (g_message("%s: No threads", __func__));
3309 mono_threads_unlock ();
3312 mono_threads_unlock ();
3315 mono_threads_lock ();
3316 if (shutting_down) {
3317 /* somebody else is shutting down */
3318 mono_threads_unlock ();
3321 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3322 mono_g_hash_table_foreach (threads, print_tids, NULL));
3324 mono_os_event_reset (&background_change_event);
3326 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3327 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3328 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3329 mono_threads_unlock ();
3331 /* Something to wait for */
3332 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3333 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3334 } while(wait->num>0);
3336 /* Mono is shutting down, so just wait for the end */
3337 if (!mono_runtime_try_shutdown ()) {
3338 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3339 mono_thread_suspend (mono_thread_internal_current ());
3340 mono_thread_execute_interruption ();
3344 * Remove everything but the finalizer thread and self.
3345 * Also abort all the background threads
3348 mono_threads_lock ();
3351 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3352 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3353 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3355 mono_threads_unlock ();
3357 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3358 if (wait->num > 0) {
3359 /* Something to wait for */
3360 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3362 } while (wait->num > 0);
3365 * give the subthreads a chance to really quit (this is mainly needed
3366 * to get correct user and system times from getrusage/wait/time(1)).
3367 * This could be removed if we avoid pthread_detach() and use pthread_join().
3369 mono_thread_info_yield ();
3373 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3375 MonoInternalThread *thread = (MonoInternalThread*)value;
3376 struct wait_data *wait = (struct wait_data*)user_data;
3379 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3381 * This needs no locking.
3383 if ((thread->state & ThreadState_Suspended) != 0 ||
3384 (thread->state & ThreadState_Stopped) != 0)
3387 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3388 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3389 wait->threads [wait->num] = thread;
3395 * mono_thread_suspend_all_other_threads:
3397 * Suspend all managed threads except the finalizer thread and this thread. It is
3398 * not possible to resume them later.
3400 void mono_thread_suspend_all_other_threads (void)
3402 struct wait_data wait_data;
3403 struct wait_data *wait = &wait_data;
3405 MonoNativeThreadId self = mono_native_thread_id_get ();
3406 guint32 eventidx = 0;
3407 gboolean starting, finished;
3409 memset (wait, 0, sizeof (struct wait_data));
3411 * The other threads could be in an arbitrary state at this point, i.e.
3412 * they could be starting up, shutting down etc. This means that there could be
3413 * threads which are not even in the threads hash table yet.
3417 * First we set a barrier which will be checked by all threads before they
3418 * are added to the threads hash table, and they will exit if the flag is set.
3419 * This ensures that no threads could be added to the hash later.
3420 * We will use shutting_down as the barrier for now.
3422 g_assert (shutting_down);
3425 * We make multiple calls to WaitForMultipleObjects since:
3426 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3427 * - some threads could exit without becoming suspended
3432 * Make a copy of the hashtable since we can't do anything with
3433 * threads while threads_mutex is held.
3436 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3437 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3438 mono_threads_lock ();
3439 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3440 mono_threads_unlock ();
3443 /* Get the suspended events that we'll be waiting for */
3444 for (i = 0; i < wait->num; ++i) {
3445 MonoInternalThread *thread = wait->threads [i];
3447 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3448 || mono_gc_is_finalizer_internal_thread (thread)
3449 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3451 mono_threads_close_thread_handle (wait->handles [i]);
3452 wait->threads [i] = NULL;
3456 LOCK_THREAD (thread);
3458 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3459 UNLOCK_THREAD (thread);
3460 mono_threads_close_thread_handle (wait->handles [i]);
3461 wait->threads [i] = NULL;
3467 /* Convert abort requests into suspend requests */
3468 if ((thread->state & ThreadState_AbortRequested) != 0)
3469 thread->state &= ~ThreadState_AbortRequested;
3471 thread->state |= ThreadState_SuspendRequested;
3472 mono_os_event_reset (thread->suspended);
3474 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3475 async_suspend_internal (thread, TRUE);
3477 mono_threads_close_thread_handle (wait->handles [i]);
3478 wait->threads [i] = NULL;
3480 if (eventidx <= 0) {
3482 * If there are threads which are starting up, we wait until they
3483 * are suspended when they try to register in the threads hash.
3484 * This is guaranteed to finish, since the threads which can create new
3485 * threads get suspended after a while.
3486 * FIXME: The finalizer thread can still create new threads.
3488 mono_threads_lock ();
3489 if (threads_starting_up)
3490 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3493 mono_threads_unlock ();
3495 mono_thread_info_sleep (100, NULL);
3503 MonoInternalThread *thread;
3504 MonoStackFrameInfo *frames;
3505 int nframes, max_frames;
3506 int nthreads, max_threads;
3507 MonoInternalThread **threads;
3508 } ThreadDumpUserData;
3510 static gboolean thread_dump_requested;
3512 /* This needs to be async safe */
3514 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3516 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3518 if (ud->nframes < ud->max_frames) {
3519 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3526 /* This needs to be async safe */
3527 static SuspendThreadResult
3528 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3530 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3531 MonoInternalThread *thread = user_data->thread;
3534 /* This no longer works with remote unwinding */
3535 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3536 mono_thread_internal_describe (thread, text);
3537 g_string_append (text, "\n");
3540 if (thread == mono_thread_internal_current ())
3541 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3543 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3545 return MonoResumeThread;
3549 int nthreads, max_threads;
3550 MonoInternalThread **threads;
3551 } CollectThreadsUserData;
3554 collect_thread (gpointer key, gpointer value, gpointer user)
3556 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3557 MonoInternalThread *thread = (MonoInternalThread *)value;
3559 if (ud->nthreads < ud->max_threads)
3560 ud->threads [ud->nthreads ++] = thread;
3564 * Collect running threads into the THREADS array.
3565 * THREADS should be an array allocated on the stack.
3568 collect_threads (MonoInternalThread **thread_array, int max_threads)
3570 CollectThreadsUserData ud;
3572 memset (&ud, 0, sizeof (ud));
3573 /* This array contains refs, but its on the stack, so its ok */
3574 ud.threads = thread_array;
3575 ud.max_threads = max_threads;
3577 mono_threads_lock ();
3578 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3579 mono_threads_unlock ();
3585 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3587 GString* text = g_string_new (0);
3589 GError *error = NULL;
3592 ud->thread = thread;
3595 /* Collect frames for the thread */
3596 if (thread == mono_thread_internal_current ()) {
3597 get_thread_dump (mono_thread_info_current (), ud);
3599 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3603 * Do all the non async-safe work outside of get_thread_dump.
3606 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3608 g_string_append_printf (text, "\n\"%s\"", name);
3611 else if (thread->threadpool_thread) {
3612 g_string_append (text, "\n\"<threadpool thread>\"");
3614 g_string_append (text, "\n\"<unnamed thread>\"");
3617 for (i = 0; i < ud->nframes; ++i) {
3618 MonoStackFrameInfo *frame = &ud->frames [i];
3619 MonoMethod *method = NULL;
3621 if (frame->type == FRAME_TYPE_MANAGED)
3622 method = mono_jit_info_get_method (frame->ji);
3625 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3626 g_string_append_printf (text, " %s\n", location);
3629 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3633 fprintf (stdout, "%s", text->str);
3635 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3636 OutputDebugStringA(text->str);
3639 g_string_free (text, TRUE);
3644 mono_threads_perform_thread_dump (void)
3646 ThreadDumpUserData ud;
3647 MonoInternalThread *thread_array [128];
3648 int tindex, nthreads;
3650 if (!thread_dump_requested)
3653 printf ("Full thread dump:\n");
3655 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3656 nthreads = collect_threads (thread_array, 128);
3658 memset (&ud, 0, sizeof (ud));
3659 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3660 ud.max_frames = 256;
3662 for (tindex = 0; tindex < nthreads; ++tindex)
3663 dump_thread (thread_array [tindex], &ud);
3667 thread_dump_requested = FALSE;
3670 /* Obtain the thread dump of all threads */
3672 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3675 ThreadDumpUserData ud;
3676 MonoInternalThread *thread_array [128];
3677 MonoDomain *domain = mono_domain_get ();
3678 MonoDebugSourceLocation *location;
3679 int tindex, nthreads;
3683 *out_threads = NULL;
3684 *out_stack_frames = NULL;
3686 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3687 nthreads = collect_threads (thread_array, 128);
3689 memset (&ud, 0, sizeof (ud));
3690 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3691 ud.max_frames = 256;
3693 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3696 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3700 for (tindex = 0; tindex < nthreads; ++tindex) {
3701 MonoInternalThread *thread = thread_array [tindex];
3702 MonoArray *thread_frames;
3708 /* Collect frames for the thread */
3709 if (thread == mono_thread_internal_current ()) {
3710 get_thread_dump (mono_thread_info_current (), &ud);
3712 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3715 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3717 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3720 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3722 for (i = 0; i < ud.nframes; ++i) {
3723 MonoStackFrameInfo *frame = &ud.frames [i];
3724 MonoMethod *method = NULL;
3725 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3729 sf->native_offset = frame->native_offset;
3731 if (frame->type == FRAME_TYPE_MANAGED)
3732 method = mono_jit_info_get_method (frame->ji);
3735 sf->method_address = (gsize) frame->ji->code_start;
3737 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3740 MONO_OBJECT_SETREF (sf, method, rm);
3742 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3744 sf->il_offset = location->il_offset;
3746 if (location && location->source_file) {
3747 MonoString *filename = mono_string_new_checked (domain, location->source_file, error);
3750 MONO_OBJECT_SETREF (sf, filename, filename);
3751 sf->line = location->row;
3752 sf->column = location->column;
3754 mono_debug_free_source_location (location);
3759 mono_array_setref (thread_frames, i, sf);
3765 return is_ok (error);
3769 * mono_threads_request_thread_dump:
3771 * Ask all threads except the current to print their stacktrace to stdout.
3774 mono_threads_request_thread_dump (void)
3776 /*The new thread dump code runs out of the finalizer thread. */
3777 thread_dump_requested = TRUE;
3778 mono_gc_finalize_notify ();
3783 gint allocated; /* +1 so that refs [allocated] == NULL */
3787 typedef struct ref_stack RefStack;
3790 ref_stack_new (gint initial_size)
3794 initial_size = MAX (initial_size, 16) + 1;
3795 rs = g_new0 (RefStack, 1);
3796 rs->refs = g_new0 (gpointer, initial_size);
3797 rs->allocated = initial_size;
3802 ref_stack_destroy (gpointer ptr)
3804 RefStack *rs = (RefStack *)ptr;
3813 ref_stack_push (RefStack *rs, gpointer ptr)
3815 g_assert (rs != NULL);
3817 if (rs->bottom >= rs->allocated) {
3818 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3819 rs->allocated <<= 1;
3820 rs->refs [rs->allocated] = NULL;
3822 rs->refs [rs->bottom++] = ptr;
3826 ref_stack_pop (RefStack *rs)
3828 if (rs == NULL || rs->bottom == 0)
3832 rs->refs [rs->bottom] = NULL;
3836 ref_stack_find (RefStack *rs, gpointer ptr)
3843 for (refs = rs->refs; refs && *refs; refs++) {
3851 * mono_thread_push_appdomain_ref:
3853 * Register that the current thread may have references to objects in domain
3854 * @domain on its stack. Each call to this function should be paired with a
3855 * call to pop_appdomain_ref.
3858 mono_thread_push_appdomain_ref (MonoDomain *domain)
3860 MonoInternalThread *thread = mono_thread_internal_current ();
3863 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3864 SPIN_LOCK (thread->lock_thread_id);
3865 if (thread->appdomain_refs == NULL)
3866 thread->appdomain_refs = ref_stack_new (16);
3867 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3868 SPIN_UNLOCK (thread->lock_thread_id);
3873 mono_thread_pop_appdomain_ref (void)
3875 MonoInternalThread *thread = mono_thread_internal_current ();
3878 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3879 SPIN_LOCK (thread->lock_thread_id);
3880 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3881 SPIN_UNLOCK (thread->lock_thread_id);
3886 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3889 SPIN_LOCK (thread->lock_thread_id);
3890 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3891 SPIN_UNLOCK (thread->lock_thread_id);
3896 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3898 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3901 typedef struct abort_appdomain_data {
3902 struct wait_data wait;
3904 } abort_appdomain_data;
3907 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3909 MonoInternalThread *thread = (MonoInternalThread*)value;
3910 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3911 MonoDomain *domain = data->domain;
3913 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3914 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3916 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3917 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3918 data->wait.threads [data->wait.num] = thread;
3921 /* Just ignore the rest, we can't do anything with
3929 * mono_threads_abort_appdomain_threads:
3931 * Abort threads which has references to the given appdomain.
3934 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3936 abort_appdomain_data user_data;
3938 int orig_timeout = timeout;
3941 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3943 start_time = mono_msec_ticks ();
3945 mono_threads_lock ();
3947 user_data.domain = domain;
3948 user_data.wait.num = 0;
3949 /* This shouldn't take any locks */
3950 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3951 mono_threads_unlock ();
3953 if (user_data.wait.num > 0) {
3954 /* Abort the threads outside the threads lock */
3955 for (i = 0; i < user_data.wait.num; ++i)
3956 mono_thread_internal_abort (user_data.wait.threads [i], TRUE);
3959 * We should wait for the threads either to abort, or to leave the
3960 * domain. We can't do the latter, so we wait with a timeout.
3962 wait_for_tids (&user_data.wait, 100, FALSE);
3965 /* Update remaining time */
3966 timeout -= mono_msec_ticks () - start_time;
3967 start_time = mono_msec_ticks ();
3969 if (orig_timeout != -1 && timeout < 0)
3972 while (user_data.wait.num > 0);
3974 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3980 mono_thread_self_abort (void)
3983 self_abort_internal (&error);
3984 mono_error_set_pending_exception (&error);
3988 * mono_thread_get_undeniable_exception:
3990 * Return an exception which needs to be raised when leaving a catch clause.
3991 * This is used for undeniable exception propagation.
3994 mono_thread_get_undeniable_exception (void)
3996 MonoInternalThread *thread = mono_thread_internal_current ();
3998 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
4001 // We don't want to have our exception effect calls made by
4002 // the catching block
4004 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
4008 * FIXME: Clear the abort exception and return an AppDomainUnloaded
4009 * exception if the thread no longer references a dying appdomain.
4011 thread->abort_exc->trace_ips = NULL;
4012 thread->abort_exc->stack_trace = NULL;
4013 return thread->abort_exc;
4016 #if MONO_SMALL_CONFIG
4017 #define NUM_STATIC_DATA_IDX 4
4018 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4022 #define NUM_STATIC_DATA_IDX 8
4023 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4024 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4028 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4029 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4032 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4034 gpointer *static_data = (gpointer *)addr;
4036 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4037 void **ptr = (void **)static_data [i];
4042 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4043 void **p = ptr + idx;
4046 mark_func ((MonoObject**)p, gc_data);
4052 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4054 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4058 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4060 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4064 * mono_alloc_static_data
4066 * Allocate memory blocks for storing threads or context static data
4069 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4071 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4074 gpointer* static_data = *static_data_ptr;
4076 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4077 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4079 if (mono_gc_user_markers_supported ()) {
4080 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4081 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4083 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4084 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4087 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4088 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4089 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4090 *static_data_ptr = static_data;
4091 static_data [0] = static_data;
4094 for (i = 1; i <= idx; ++i) {
4095 if (static_data [i])
4098 if (mono_gc_user_markers_supported ())
4099 static_data [i] = g_malloc0 (static_data_size [i]);
4101 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4102 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4103 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4108 mono_free_static_data (gpointer* static_data)
4111 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4112 gpointer p = static_data [i];
4116 * At this point, the static data pointer array is still registered with the
4117 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4118 * data. Freeing the individual arrays without first nulling their slots
4119 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4120 * such an already freed array. See bug #13813.
4122 static_data [i] = NULL;
4123 mono_memory_write_barrier ();
4124 if (mono_gc_user_markers_supported ())
4127 mono_gc_free_fixed (p);
4129 mono_gc_free_fixed (static_data);
4133 * mono_init_static_data_info
4135 * Initializes static data counters
4137 static void mono_init_static_data_info (StaticDataInfo *static_data)
4139 static_data->idx = 0;
4140 static_data->offset = 0;
4141 static_data->freelist = NULL;
4145 * mono_alloc_static_data_slot
4147 * Generates an offset for static data. static_data contains the counters
4148 * used to generate it.
4151 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4153 if (!static_data->idx && !static_data->offset) {
4155 * we use the first chunk of the first allocation also as
4156 * an array for the rest of the data
4158 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4160 static_data->offset += align - 1;
4161 static_data->offset &= ~(align - 1);
4162 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4163 static_data->idx ++;
4164 g_assert (size <= static_data_size [static_data->idx]);
4165 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4166 static_data->offset = 0;
4168 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4169 static_data->offset += size;
4174 * LOCKING: requires that threads_mutex is held
4177 context_adjust_static_data (MonoAppContext *ctx)
4179 if (context_static_info.offset || context_static_info.idx > 0) {
4180 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4181 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4182 ctx->data->static_data = ctx->static_data;
4187 * LOCKING: requires that threads_mutex is held
4190 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4192 MonoInternalThread *thread = (MonoInternalThread *)value;
4193 guint32 offset = GPOINTER_TO_UINT (user);
4195 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4199 * LOCKING: requires that threads_mutex is held
4202 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4204 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4209 guint32 offset = GPOINTER_TO_UINT (user);
4210 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4211 ctx->data->static_data = ctx->static_data;
4214 static StaticDataFreeList*
4215 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4217 StaticDataFreeList* prev = NULL;
4218 StaticDataFreeList* tmp = static_data->freelist;
4220 if (tmp->size == size) {
4222 prev->next = tmp->next;
4224 static_data->freelist = tmp->next;
4233 #if SIZEOF_VOID_P == 4
4240 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4242 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4244 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4245 MonoBitSet *rb = sets [idx];
4246 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4247 offset /= sizeof (uintptr_t);
4248 /* offset is now the bitmap offset */
4249 for (int i = 0; i < numbits; ++i) {
4250 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4251 mono_bitset_set_fast (rb, offset + i);
4256 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4258 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4259 MonoBitSet *rb = sets [idx];
4260 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4261 offset /= sizeof (uintptr_t);
4262 /* offset is now the bitmap offset */
4263 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4264 mono_bitset_clear_fast (rb, offset + i);
4268 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4270 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4272 StaticDataInfo *info;
4275 if (static_type == SPECIAL_STATIC_THREAD) {
4276 info = &thread_static_info;
4277 sets = thread_reference_bitmaps;
4279 info = &context_static_info;
4280 sets = context_reference_bitmaps;
4283 mono_threads_lock ();
4285 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4289 offset = item->offset;
4292 offset = mono_alloc_static_data_slot (info, size, align);
4295 update_reference_bitmap (sets, offset, bitmap, numbits);
4297 if (static_type == SPECIAL_STATIC_THREAD) {
4298 /* This can be called during startup */
4299 if (threads != NULL)
4300 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4302 if (contexts != NULL)
4303 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4305 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4308 mono_threads_unlock ();
4314 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4316 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4318 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4319 return get_thread_static_data (thread, offset);
4321 return get_context_static_data (thread->current_appcontext, offset);
4326 mono_get_special_static_data (guint32 offset)
4328 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4337 * LOCKING: requires that threads_mutex is held
4340 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4342 MonoInternalThread *thread = (MonoInternalThread *)value;
4343 OffsetSize *data = (OffsetSize *)user;
4344 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4345 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4348 if (!thread->static_data || !thread->static_data [idx])
4350 ptr = ((char*) thread->static_data [idx]) + off;
4351 mono_gc_bzero_atomic (ptr, data->size);
4355 * LOCKING: requires that threads_mutex is held
4358 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4360 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4365 OffsetSize *data = (OffsetSize *)user;
4366 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4367 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4370 if (!ctx->static_data || !ctx->static_data [idx])
4373 ptr = ((char*) ctx->static_data [idx]) + off;
4374 mono_gc_bzero_atomic (ptr, data->size);
4378 do_free_special_slot (guint32 offset, guint32 size)
4380 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4382 StaticDataInfo *info;
4384 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4385 info = &thread_static_info;
4386 sets = thread_reference_bitmaps;
4388 info = &context_static_info;
4389 sets = context_reference_bitmaps;
4392 guint32 data_offset = offset;
4393 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4394 OffsetSize data = { data_offset, size };
4396 clear_reference_bitmap (sets, data.offset, data.size);
4398 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4399 if (threads != NULL)
4400 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4402 if (contexts != NULL)
4403 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4406 if (!mono_runtime_is_shutting_down ()) {
4407 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4409 item->offset = offset;
4412 item->next = info->freelist;
4413 info->freelist = item;
4418 do_free_special (gpointer key, gpointer value, gpointer data)
4420 MonoClassField *field = (MonoClassField *)key;
4421 guint32 offset = GPOINTER_TO_UINT (value);
4424 size = mono_type_size (field->type, &align);
4425 do_free_special_slot (offset, size);
4429 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4431 mono_threads_lock ();
4433 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4435 mono_threads_unlock ();
4439 static void CALLBACK dummy_apc (ULONG_PTR param)
4445 * mono_thread_execute_interruption
4447 * Performs the operation that the requested thread state requires (abort,
4450 static MonoException*
4451 mono_thread_execute_interruption (void)
4453 MonoInternalThread *thread = mono_thread_internal_current ();
4454 MonoThread *sys_thread = mono_thread_current ();
4456 LOCK_THREAD (thread);
4458 /* MonoThread::interruption_requested can only be changed with atomics */
4459 if (!mono_thread_clear_interruption_requested (thread)) {
4460 UNLOCK_THREAD (thread);
4464 /* this will consume pending APC calls */
4466 mono_win32_wait_for_single_object_ex (GetCurrentThread (), 0, TRUE);
4469 /* Clear the interrupted flag of the thread so it can wait again */
4470 mono_thread_info_clear_self_interrupt ();
4472 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4473 if (sys_thread->pending_exception) {
4476 exc = sys_thread->pending_exception;
4477 sys_thread->pending_exception = NULL;
4479 UNLOCK_THREAD (thread);
4481 } else if (thread->state & (ThreadState_AbortRequested)) {
4482 UNLOCK_THREAD (thread);
4483 g_assert (sys_thread->pending_exception == NULL);
4484 if (thread->abort_exc == NULL) {
4486 * This might be racy, but it has to be called outside the lock
4487 * since it calls managed code.
4489 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4491 return thread->abort_exc;
4492 } else if (thread->state & (ThreadState_SuspendRequested)) {
4493 /* calls UNLOCK_THREAD (thread) */
4494 self_suspend_internal ();
4496 } else if (thread->thread_interrupt_requested) {
4498 thread->thread_interrupt_requested = FALSE;
4499 UNLOCK_THREAD (thread);
4501 return(mono_get_exception_thread_interrupted ());
4504 UNLOCK_THREAD (thread);
4510 * mono_thread_request_interruption
4512 * A signal handler can call this method to request the interruption of a
4513 * thread. The result of the interruption will depend on the current state of
4514 * the thread. If the result is an exception that needs to be throw, it is
4515 * provided as return value.
4518 mono_thread_request_interruption (gboolean running_managed)
4520 MonoInternalThread *thread = mono_thread_internal_current ();
4522 /* The thread may already be stopping */
4526 if (!mono_thread_set_interruption_requested (thread))
4529 if (!running_managed || is_running_protected_wrapper ()) {
4530 /* Can't stop while in unmanaged code. Increase the global interruption
4531 request count. When exiting the unmanaged method the count will be
4532 checked and the thread will be interrupted. */
4534 /* this will awake the thread if it is in WaitForSingleObject
4537 mono_win32_interrupt_wait (thread->thread_info, thread->native_handle, (DWORD)thread->tid);
4539 mono_thread_info_self_interrupt ();
4544 return mono_thread_execute_interruption ();
4548 /*This function should be called by a thread after it has exited all of
4549 * its handle blocks at interruption time.*/
4551 mono_thread_resume_interruption (gboolean exec)
4553 MonoInternalThread *thread = mono_thread_internal_current ();
4554 gboolean still_aborting;
4556 /* The thread may already be stopping */
4560 LOCK_THREAD (thread);
4561 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4562 UNLOCK_THREAD (thread);
4564 /*This can happen if the protected block called Thread::ResetAbort*/
4565 if (!still_aborting)
4568 if (!mono_thread_set_interruption_requested (thread))
4571 mono_thread_info_self_interrupt ();
4574 return mono_thread_execute_interruption ();
4579 gboolean mono_thread_interruption_requested ()
4581 if (thread_interruption_requested) {
4582 MonoInternalThread *thread = mono_thread_internal_current ();
4583 /* The thread may already be stopping */
4585 return mono_thread_get_interruption_requested (thread);
4590 static MonoException*
4591 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4593 MonoInternalThread *thread = mono_thread_internal_current ();
4595 /* The thread may already be stopping */
4598 if (!mono_thread_get_interruption_requested (thread))
4600 if (!bypass_abort_protection && is_running_protected_wrapper ())
4603 return mono_thread_execute_interruption ();
4607 * Performs the interruption of the current thread, if one has been requested,
4608 * and the thread is not running a protected wrapper.
4609 * Return the exception which needs to be thrown, if any.
4612 mono_thread_interruption_checkpoint (void)
4614 return mono_thread_interruption_checkpoint_request (FALSE);
4618 * Performs the interruption of the current thread, if one has been requested.
4619 * Return the exception which needs to be thrown, if any.
4622 mono_thread_force_interruption_checkpoint_noraise (void)
4624 return mono_thread_interruption_checkpoint_request (TRUE);
4628 * mono_set_pending_exception:
4630 * Set the pending exception of the current thread to EXC.
4631 * The exception will be thrown when execution returns to managed code.
4634 mono_set_pending_exception (MonoException *exc)
4636 MonoThread *thread = mono_thread_current ();
4638 /* The thread may already be stopping */
4642 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4644 mono_thread_request_interruption (FALSE);
4648 * mono_thread_interruption_request_flag:
4650 * Returns the address of a flag that will be non-zero if an interruption has
4651 * been requested for a thread. The thread to interrupt may not be the current
4652 * thread, so an additional call to mono_thread_interruption_requested() or
4653 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4656 gint32* mono_thread_interruption_request_flag ()
4658 return &thread_interruption_requested;
4662 mono_thread_init_apartment_state (void)
4665 MonoInternalThread* thread = mono_thread_internal_current ();
4667 /* Positive return value indicates success, either
4668 * S_OK if this is first CoInitialize call, or
4669 * S_FALSE if CoInitialize already called, but with same
4670 * threading model. A negative value indicates failure,
4671 * probably due to trying to change the threading model.
4673 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4674 ? COINIT_APARTMENTTHREADED
4675 : COINIT_MULTITHREADED) < 0) {
4676 thread->apartment_state = ThreadApartmentState_Unknown;
4682 mono_thread_cleanup_apartment_state (void)
4685 MonoInternalThread* thread = mono_thread_internal_current ();
4687 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4694 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4696 LOCK_THREAD (thread);
4697 thread->state |= state;
4698 UNLOCK_THREAD (thread);
4702 * mono_thread_test_and_set_state:
4703 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4704 * \returns TRUE if \p set was OR'd in.
4707 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4709 LOCK_THREAD (thread);
4711 if ((thread->state & test) != 0) {
4712 UNLOCK_THREAD (thread);
4716 thread->state |= set;
4717 UNLOCK_THREAD (thread);
4723 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4725 LOCK_THREAD (thread);
4726 thread->state &= ~state;
4727 UNLOCK_THREAD (thread);
4731 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4733 gboolean ret = FALSE;
4735 LOCK_THREAD (thread);
4737 if ((thread->state & test) != 0) {
4741 UNLOCK_THREAD (thread);
4747 self_interrupt_thread (void *_unused)
4750 MonoThreadInfo *info;
4752 exc = mono_thread_execute_interruption ();
4754 if (mono_threads_is_coop_enabled ()) {
4755 /* We can return from an async call in coop, as
4756 * it's simply called when exiting the safepoint */
4760 g_error ("%s: we can't resume from an async call", __func__);
4763 info = mono_thread_info_current ();
4765 /* We must use _with_context since we didn't trampoline into the runtime */
4766 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. */
4770 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4774 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4778 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4780 MonoJitInfo **dest = (MonoJitInfo **)data;
4786 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4788 MonoJitInfo *ji = NULL;
4793 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4794 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4795 * where we hold runtime locks.
4797 if (!mono_threads_is_coop_enabled ())
4798 mono_thread_info_set_is_async_context (TRUE);
4799 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4800 if (!mono_threads_is_coop_enabled ())
4801 mono_thread_info_set_is_async_context (FALSE);
4806 MonoInternalThread *thread;
4807 gboolean install_async_abort;
4808 MonoThreadInfoInterruptToken *interrupt_token;
4811 static SuspendThreadResult
4812 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4814 AbortThreadData *data = (AbortThreadData *)ud;
4815 MonoInternalThread *thread = data->thread;
4816 MonoJitInfo *ji = NULL;
4817 gboolean protected_wrapper;
4818 gboolean running_managed;
4820 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4821 return MonoResumeThread;
4823 /*someone is already interrupting it*/
4824 if (!mono_thread_set_interruption_requested (thread))
4825 return MonoResumeThread;
4827 ji = mono_thread_info_get_last_managed (info);
4828 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4829 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4831 if (!protected_wrapper && running_managed) {
4832 /*We are in managed code*/
4833 /*Set the thread to call */
4834 if (data->install_async_abort)
4835 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4836 return MonoResumeThread;
4839 * This will cause waits to be broken.
4840 * It will also prevent the thread from entering a wait, so if the thread returns
4841 * from the wait before it receives the abort signal, it will just spin in the wait
4842 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4845 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4847 return MonoResumeThread;
4852 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4854 AbortThreadData data;
4856 g_assert (thread != mono_thread_internal_current ());
4858 data.thread = thread;
4859 data.install_async_abort = install_async_abort;
4860 data.interrupt_token = NULL;
4862 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4863 if (data.interrupt_token)
4864 mono_thread_info_finish_interrupt (data.interrupt_token);
4865 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4869 self_abort_internal (MonoError *error)
4875 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4876 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4879 Self aborts ignore the protected block logic and raise the TAE regardless. This is verified by one of the tests in mono/tests/abort-cctor.cs.
4881 exc = mono_thread_request_interruption (TRUE);
4883 mono_error_set_exception_instance (error, exc);
4885 mono_thread_info_self_interrupt ();
4889 MonoInternalThread *thread;
4891 MonoThreadInfoInterruptToken *interrupt_token;
4892 } SuspendThreadData;
4894 static SuspendThreadResult
4895 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4897 SuspendThreadData *data = (SuspendThreadData *)ud;
4898 MonoInternalThread *thread = data->thread;
4899 MonoJitInfo *ji = NULL;
4900 gboolean protected_wrapper;
4901 gboolean running_managed;
4903 ji = mono_thread_info_get_last_managed (info);
4904 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4905 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4907 if (running_managed && !protected_wrapper) {
4908 if (mono_threads_is_coop_enabled ()) {
4909 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4910 return MonoResumeThread;
4912 thread->state &= ~ThreadState_SuspendRequested;
4913 thread->state |= ThreadState_Suspended;
4914 return KeepSuspended;
4917 mono_thread_set_interruption_requested (thread);
4918 if (data->interrupt)
4919 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4921 return MonoResumeThread;
4925 /* LOCKING: called with @thread synch_cs held, and releases it */
4927 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4929 SuspendThreadData data;
4931 g_assert (thread != mono_thread_internal_current ());
4933 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4935 thread->self_suspended = FALSE;
4937 data.thread = thread;
4938 data.interrupt = interrupt;
4939 data.interrupt_token = NULL;
4941 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4942 if (data.interrupt_token)
4943 mono_thread_info_finish_interrupt (data.interrupt_token);
4945 UNLOCK_THREAD (thread);
4948 /* LOCKING: called with @thread synch_cs held, and releases it */
4950 self_suspend_internal (void)
4952 MonoInternalThread *thread;
4954 MonoOSEventWaitRet res;
4956 thread = mono_thread_internal_current ();
4958 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4960 thread->self_suspended = TRUE;
4962 thread->state &= ~ThreadState_SuspendRequested;
4963 thread->state |= ThreadState_Suspended;
4965 UNLOCK_THREAD (thread);
4967 event = thread->suspended;
4970 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4971 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4976 suspend_for_shutdown_async_call (gpointer unused)
4979 mono_thread_info_yield ();
4982 static SuspendThreadResult
4983 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4985 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4986 return MonoResumeThread;
4990 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4992 g_assert (thread != mono_thread_internal_current ());
4994 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4998 * mono_thread_is_foreign:
4999 * \param thread the thread to query
5001 * This function allows one to determine if a thread was created by the mono runtime and has
5002 * a well defined lifecycle or it's a foreign one, created by the native environment.
5004 * \returns TRUE if \p thread was not created by the runtime.
5007 mono_thread_is_foreign (MonoThread *thread)
5009 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
5010 return info->runtime_thread == FALSE;
5015 threads_native_thread_join_lock (gpointer tid, gpointer value)
5017 pthread_t thread = (pthread_t)tid;
5018 if (thread != pthread_self ()) {
5020 /* This shouldn't block */
5021 mono_threads_join_lock ();
5022 mono_native_thread_join (thread);
5023 mono_threads_join_unlock ();
5028 threads_native_thread_join_nolock (gpointer tid, gpointer value)
5030 pthread_t thread = (pthread_t)tid;
5032 mono_native_thread_join (thread);
5037 threads_add_joinable_thread_nolock (gpointer tid)
5039 g_hash_table_insert (joinable_threads, tid, tid);
5043 threads_native_thread_join_lock (gpointer tid, gpointer value)
5045 MonoNativeThreadId thread_id = (MonoNativeThreadId)(guint64)tid;
5046 HANDLE thread_handle = (HANDLE)value;
5047 if (thread_id != GetCurrentThreadId () && thread_handle != NULL && thread_handle != INVALID_HANDLE_VALUE) {
5049 /* This shouldn't block */
5050 mono_threads_join_lock ();
5051 mono_native_thread_join_handle (thread_handle, TRUE);
5052 mono_threads_join_unlock ();
5058 threads_native_thread_join_nolock (gpointer tid, gpointer value)
5060 HANDLE thread_handle = (HANDLE)value;
5062 mono_native_thread_join_handle (thread_handle, TRUE);
5067 threads_add_joinable_thread_nolock (gpointer tid)
5069 g_hash_table_insert (joinable_threads, tid, (gpointer)OpenThread (SYNCHRONIZE, TRUE, (MonoNativeThreadId)(guint64)tid));
5074 mono_threads_add_joinable_runtime_thread (gpointer thread_info)
5076 g_assert (thread_info);
5077 MonoThreadInfo *mono_thread_info = (MonoThreadInfo*)thread_info;
5079 if (mono_thread_info->runtime_thread) {
5080 if (InterlockedCompareExchange (&mono_thread_info->thread_pending_native_join, TRUE, FALSE) == FALSE)
5081 mono_threads_add_joinable_thread ((gpointer)(MONO_UINT_TO_NATIVE_THREAD_ID (mono_thread_info_get_tid (mono_thread_info))));
5086 * mono_add_joinable_thread:
5088 * Add TID to the list of joinable threads.
5089 * LOCKING: Acquires the threads lock.
5092 mono_threads_add_joinable_thread (gpointer tid)
5095 * We cannot detach from threads because it causes problems like
5096 * 2fd16f60/r114307. So we collect them and join them when
5097 * we have time (in the finalizer thread).
5099 joinable_threads_lock ();
5100 if (!joinable_threads)
5101 joinable_threads = g_hash_table_new (NULL, NULL);
5105 if (!g_hash_table_lookup_extended (joinable_threads, tid, &orig_key, &value)) {
5106 threads_add_joinable_thread_nolock (tid);
5107 UnlockedIncrement (&joinable_thread_count);
5109 joinable_threads_unlock ();
5111 mono_gc_finalize_notify ();
5115 * mono_threads_join_threads:
5117 * Join all joinable threads. This is called from the finalizer thread.
5118 * LOCKING: Acquires the threads lock.
5121 mono_threads_join_threads (void)
5123 GHashTableIter iter;
5129 if (!UnlockedRead (&joinable_thread_count))
5133 joinable_threads_lock ();
5135 if (g_hash_table_size (joinable_threads)) {
5136 g_hash_table_iter_init (&iter, joinable_threads);
5137 g_hash_table_iter_next (&iter, &key, (void**)&value);
5138 g_hash_table_remove (joinable_threads, key);
5139 UnlockedDecrement (&joinable_thread_count);
5142 joinable_threads_unlock ();
5144 threads_native_thread_join_lock (key, value);
5153 * Wait for thread TID to exit.
5154 * LOCKING: Acquires the threads lock.
5157 mono_thread_join (gpointer tid)
5159 gboolean found = FALSE;
5163 joinable_threads_lock ();
5164 if (!joinable_threads)
5165 joinable_threads = g_hash_table_new (NULL, NULL);
5167 if (g_hash_table_lookup_extended (joinable_threads, tid, &orig_key, &value)) {
5168 g_hash_table_remove (joinable_threads, tid);
5169 UnlockedDecrement (&joinable_thread_count);
5172 joinable_threads_unlock ();
5177 threads_native_thread_join_nolock (tid, value);
5181 mono_thread_internal_unhandled_exception (MonoObject* exc)
5183 MonoClass *klass = exc->vtable->klass;
5184 if (is_threadabort_exception (klass)) {
5185 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5186 } else if (!is_appdomainunloaded_exception (klass)
5187 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5188 mono_unhandled_exception (exc);
5189 if (mono_environment_exitcode_get () == 1) {
5190 mono_environment_exitcode_set (255);
5191 mono_invoke_unhandled_exception_hook (exc);
5192 g_assert_not_reached ();
5198 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5201 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5202 mono_error_set_pending_exception (&error);
5206 * mono_threads_attach_coop: called by native->managed wrappers
5209 * - blocking mode: contains gc unsafe transition cookie
5210 * - non-blocking mode: contains random data
5211 * - @return: the original domain which needs to be restored, or NULL.
5214 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5217 MonoThreadInfo *info;
5220 orig = mono_domain_get ();
5223 /* Happens when called from AOTed code which is only used in the root domain. */
5224 domain = mono_get_root_domain ();
5228 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5229 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5230 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5231 * we're only responsible for making the cookie. */
5232 if (mono_threads_is_blocking_transition_enabled ())
5233 external = !(info = mono_thread_info_current_unchecked ()) || !mono_thread_info_is_live (info);
5235 if (!mono_thread_internal_current ()) {
5236 mono_thread_attach_full (domain, FALSE);
5239 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5243 mono_domain_set (domain, TRUE);
5245 if (mono_threads_is_blocking_transition_enabled ()) {
5247 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5248 * return the right cookie. */
5249 *dummy = mono_threads_enter_gc_unsafe_region_cookie ();
5251 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5252 *dummy = mono_threads_enter_gc_unsafe_region (dummy);
5260 * mono_threads_detach_coop: called by native->managed wrappers
5262 * - @cookie: the original domain which needs to be restored, or NULL.
5264 * - blocking mode: contains gc unsafe transition cookie
5265 * - non-blocking mode: contains random data
5268 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5270 MonoDomain *domain, *orig;
5272 orig = (MonoDomain*) cookie;
5274 domain = mono_domain_get ();
5277 if (mono_threads_is_blocking_transition_enabled ()) {
5278 /* it won't do anything if cookie is NULL
5279 * thread state RUNNING -> (RUNNING|BLOCKING) */
5280 mono_threads_exit_gc_unsafe_region (*dummy, dummy);
5283 if (orig != domain) {
5285 mono_domain_unset ();
5287 mono_domain_set (orig, TRUE);
5292 /* Returns TRUE if the current thread is ready to be interrupted. */
5294 mono_threads_is_ready_to_be_interrupted (void)
5296 MonoInternalThread *thread;
5298 thread = mono_thread_internal_current ();
5299 LOCK_THREAD (thread);
5300 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5301 UNLOCK_THREAD (thread);
5305 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5306 UNLOCK_THREAD (thread);
5310 UNLOCK_THREAD (thread);
5316 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5318 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5320 if (internal->thread_info) {
5321 g_string_append (text, ", state : ");
5322 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5325 if (internal->owned_mutexes) {
5328 g_string_append (text, ", owns : [");
5329 for (i = 0; i < internal->owned_mutexes->len; i++)
5330 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5331 g_string_append (text, "]");
5336 mono_thread_internal_is_current (MonoInternalThread *internal)
5338 g_assert (internal);
5339 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));