2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/debug-internals.h>
33 #include <mono/utils/monobitset.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/mono-threads-coop.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
44 #include <mono/utils/mono-error-internals.h>
45 #include <mono/utils/os-event.h>
46 #include <mono/utils/mono-threads-debug.h>
47 #include <mono/metadata/w32handle.h>
48 #include <mono/metadata/w32event.h>
49 #include <mono/metadata/w32mutex.h>
51 #include <mono/metadata/reflection-internals.h>
52 #include <mono/metadata/abi-details.h>
53 #include <mono/metadata/w32error.h>
54 #include <mono/utils/w32api.h>
60 #if defined(HOST_WIN32)
64 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
65 #define USE_TKILL_ON_ANDROID 1
68 #ifdef PLATFORM_ANDROID
71 #ifdef USE_TKILL_ON_ANDROID
72 extern int tkill (pid_t tid, int signal);
76 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
77 #define THREAD_DEBUG(a)
78 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
79 #define THREAD_WAIT_DEBUG(a)
80 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
81 #define LIBGC_DEBUG(a)
83 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
84 #define SPIN_LOCK(i) do { \
85 if (SPIN_TRYLOCK (i)) \
89 #define SPIN_UNLOCK(i) i = 0
91 #define LOCK_THREAD(thread) lock_thread((thread))
92 #define UNLOCK_THREAD(thread) unlock_thread((thread))
104 typedef struct _StaticDataFreeList StaticDataFreeList;
105 struct _StaticDataFreeList {
106 StaticDataFreeList *next;
114 StaticDataFreeList *freelist;
117 /* Controls access to the 'threads' hash table */
118 static void mono_threads_lock (void);
119 static void mono_threads_unlock (void);
120 static MonoCoopMutex threads_mutex;
122 /* Controls access to the 'joinable_threads' hash table */
123 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
124 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
125 static mono_mutex_t joinable_threads_mutex;
127 /* Holds current status of static data heap */
128 static StaticDataInfo thread_static_info;
129 static StaticDataInfo context_static_info;
131 /* The hash of existing threads (key is thread ID, value is
132 * MonoInternalThread*) that need joining before exit
134 static MonoGHashTable *threads=NULL;
136 /* List of app context GC handles.
137 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
139 static GHashTable *contexts = NULL;
141 /* Cleanup queue for contexts. */
142 static MonoReferenceQueue *context_queue;
145 * Threads which are starting up and they are not in the 'threads' hash yet.
146 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
147 * Protected by mono_threads_lock ().
149 static MonoGHashTable *threads_starting_up = NULL;
152 /* Protected by the threads lock */
153 static GHashTable *joinable_threads;
154 static int joinable_thread_count;
156 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
157 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
159 /* function called at thread start */
160 static MonoThreadStartCB mono_thread_start_cb = NULL;
162 /* function called at thread attach */
163 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
165 /* function called at thread cleanup */
166 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
168 /* The default stack size for each thread */
169 static guint32 default_stacksize = 0;
170 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
172 static void context_adjust_static_data (MonoAppContext *ctx);
173 static void mono_free_static_data (gpointer* static_data);
174 static void mono_init_static_data_info (StaticDataInfo *static_data);
175 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
176 static gboolean mono_thread_resume (MonoInternalThread* thread);
177 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
178 static void self_abort_internal (MonoError *error);
179 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
180 static void self_suspend_internal (void);
182 static MonoException* mono_thread_execute_interruption (void);
183 static void ref_stack_destroy (gpointer rs);
185 /* Spin lock for InterlockedXXX 64 bit functions */
186 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
187 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
188 static mono_mutex_t interlocked_mutex;
190 /* global count of thread interruptions requested */
191 static gint32 thread_interruption_requested = 0;
193 /* Event signaled when a thread changes its background mode */
194 static MonoOSEvent background_change_event;
196 static gboolean shutting_down = FALSE;
198 static gint32 managed_thread_id_counter = 0;
200 /* Class lazy loading functions */
201 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
204 mono_threads_lock (void)
206 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
210 mono_threads_unlock (void)
212 mono_locks_coop_release (&threads_mutex, ThreadsLock);
217 get_next_managed_thread_id (void)
219 return InterlockedIncrement (&managed_thread_id_counter);
223 INTERRUPT_REQUESTED_BIT = 0x1,
224 INTERRUPT_REQUEST_DEFERRED_BIT = 0x2,
225 ABORT_PROT_BLOCK_SHIFT = 2,
226 ABORT_PROT_BLOCK_BITS = 8,
227 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
231 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
233 gsize state = thread->thread_state;
234 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
238 verify_thread_state (gsize state)
240 //can't have both INTERRUPT_REQUESTED_BIT and INTERRUPT_REQUEST_DEFERRED_BIT set at the same time
241 g_assert ((state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) != (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT));
243 //XXX This would be nice to be true, but can happen due to self-aborts (and possibly set-pending-exception)
244 //if prot_count > 0, INTERRUPT_REQUESTED_BIT must never be set
245 // int prot_count = (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
246 // g_assert (!(prot_count > 0 && (state & INTERRUPT_REQUESTED_BIT)));
250 mono_threads_begin_abort_protected_block (void)
252 MonoInternalThread *thread = mono_thread_internal_current ();
253 gsize old_state, new_state;
255 old_state = thread->thread_state;
256 verify_thread_state (old_state);
258 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
261 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) {
262 new_state |= INTERRUPT_REQUEST_DEFERRED_BIT;
265 //bounds check abort_prot_count
266 g_assert (new_val > 0);
267 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
268 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
270 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
274 mono_threads_end_abort_protected_block (void)
276 MonoInternalThread *thread = mono_thread_internal_current ();
277 gsize old_state, new_state;
279 old_state = thread->thread_state;
280 verify_thread_state (old_state);
282 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
285 if ((old_state & INTERRUPT_REQUEST_DEFERRED_BIT) && new_val == 0) {
286 new_state |= INTERRUPT_REQUESTED_BIT;
289 //bounds check abort_prot_count
290 g_assert (new_val >= 0);
291 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
292 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
294 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
295 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
299 //Don't use this function, use inc/dec below
301 mono_thread_abort_prot_block_count_add (MonoInternalThread *thread, int val)
303 gsize old_state, new_state;
305 old_state = thread->thread_state;
306 verify_thread_state (old_state);
308 int new_val = val + ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
309 //bounds check abort_prot_count
310 g_assert (new_val >= 0);
311 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
312 new_state = (old_state & ~ABORT_PROT_BLOCK_MASK) | (new_val << ABORT_PROT_BLOCK_SHIFT);
314 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
318 mono_thread_inc_abort_prot_block_count (MonoInternalThread *thread)
320 mono_thread_abort_prot_block_count_add (thread, 1);
324 mono_thread_dec_abort_prot_block_count (MonoInternalThread *thread)
326 mono_thread_abort_prot_block_count_add (thread, -1);
330 mono_thread_get_interruption_requested (MonoInternalThread *thread)
332 gsize state = thread->thread_state;
333 return (state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
336 /* Returns TRUE is there was a state change */
338 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
340 gsize old_state, new_state;
342 old_state = thread->thread_state;
343 verify_thread_state (old_state);
346 if (!(old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)))
348 new_state = old_state & ~(INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT);
349 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
353 /* Returns TRUE is there was a state change */
355 mono_thread_set_interruption_requested (MonoInternalThread *thread)
357 //always force when the current thread is doing it to itself.
358 gboolean force_interrupt = thread == mono_thread_internal_current ();
359 gsize old_state, new_state;
361 old_state = thread->thread_state;
362 verify_thread_state (old_state);
364 int prot_count = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
366 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT))
369 //If there's an outstanding prot block, we queue it
370 if (prot_count && !force_interrupt) {
371 new_state = old_state | INTERRUPT_REQUEST_DEFERRED_BIT;
373 new_state = old_state | INTERRUPT_REQUESTED_BIT;
374 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
376 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
379 static inline MonoNativeThreadId
380 thread_get_tid (MonoInternalThread *thread)
382 /* We store the tid as a guint64 to keep the object layout constant between platforms */
383 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
386 static void ensure_synch_cs_set (MonoInternalThread *thread)
388 MonoCoopMutex *synch_cs;
390 if (thread->synch_cs != NULL) {
394 synch_cs = g_new0 (MonoCoopMutex, 1);
395 mono_coop_mutex_init_recursive (synch_cs);
397 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
398 synch_cs, NULL) != NULL) {
399 /* Another thread must have installed this CS */
400 mono_coop_mutex_destroy (synch_cs);
406 lock_thread (MonoInternalThread *thread)
408 if (!thread->synch_cs)
409 ensure_synch_cs_set (thread);
411 g_assert (thread->synch_cs);
413 mono_coop_mutex_lock (thread->synch_cs);
417 unlock_thread (MonoInternalThread *thread)
419 mono_coop_mutex_unlock (thread->synch_cs);
422 static inline gboolean
423 is_appdomainunloaded_exception (MonoClass *klass)
425 return klass == mono_class_get_appdomain_unloaded_exception_class ();
428 static inline gboolean
429 is_threadabort_exception (MonoClass *klass)
431 return klass == mono_defaults.threadabortexception_class;
435 * A special static data offset (guint32) consists of 3 parts:
437 * [0] 6-bit index into the array of chunks.
438 * [6] 25-bit offset into the array.
439 * [31] Bit indicating thread or context static.
444 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
455 } SpecialStaticOffset;
457 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
458 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
460 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
461 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
462 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
463 (((SpecialStaticOffset *) &(x))->fields.f)
466 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
468 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
470 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
471 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
473 return ((char *) thread->static_data [idx]) + off;
477 get_context_static_data (MonoAppContext *ctx, guint32 offset)
479 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
481 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
482 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
484 return ((char *) ctx->static_data [idx]) + off;
488 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
490 static MonoClassField *current_thread_field = NULL;
494 if (!current_thread_field) {
495 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
496 g_assert (current_thread_field);
499 mono_class_vtable (domain, mono_defaults.thread_class);
500 mono_domain_lock (domain);
501 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
502 mono_domain_unlock (domain);
505 return (MonoThread **)get_thread_static_data (thread, offset);
509 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
511 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
513 g_assert (current->obj.vtable->domain == domain);
515 g_assert (!*current_thread_ptr);
516 *current_thread_ptr = current;
520 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
526 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
529 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
530 /* only possible failure mode is OOM, from which we don't expect to recover. */
531 mono_error_assert_ok (&error);
533 MONO_OBJECT_SETREF (thread, internal_thread, internal);
538 static MonoInternalThread*
539 create_internal_thread_object (void)
542 MonoInternalThread *thread;
545 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
546 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
547 /* only possible failure mode is OOM, from which we don't exect to recover */
548 mono_error_assert_ok (&error);
550 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
551 mono_coop_mutex_init_recursive (thread->synch_cs);
553 thread->apartment_state = ThreadApartmentState_Unknown;
554 thread->managed_id = get_next_managed_thread_id ();
555 if (mono_gc_is_moving ()) {
556 thread->thread_pinning_ref = thread;
557 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
560 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
562 thread->suspended = g_new0 (MonoOSEvent, 1);
563 mono_os_event_init (thread->suspended, TRUE);
569 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
573 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
574 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
575 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
580 g_assert (internal->native_handle);
582 res = SetThreadPriority (internal->native_handle, priority - 2);
584 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
585 #else /* HOST_WIN32 */
588 struct sched_param param;
591 tid = thread_get_tid (internal);
593 res = pthread_getschedparam (tid, &policy, ¶m);
595 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
597 #ifdef _POSIX_PRIORITY_SCHEDULING
600 /* Necessary to get valid priority range */
602 min = sched_get_priority_min (policy);
603 max = sched_get_priority_max (policy);
605 if (max > 0 && min >= 0 && max > min) {
606 double srange, drange, sposition, dposition;
607 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
609 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
610 dposition = (sposition / srange) * drange;
611 param.sched_priority = (int)(dposition + min);
618 param.sched_priority = 50;
624 param.sched_priority = 0;
627 g_warning ("%s: unknown policy %d", __func__, policy);
632 res = pthread_setschedparam (tid, policy, ¶m);
635 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
638 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
640 #endif /* HOST_WIN32 */
644 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
647 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
649 MonoThreadInfo *info;
650 MonoInternalThread *internal;
651 MonoDomain *domain, *root_domain;
655 info = mono_thread_info_current ();
657 internal = thread->internal_thread;
658 internal->handle = mono_threads_open_thread_handle (info->handle);
660 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
662 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
663 internal->thread_info = info;
664 internal->small_id = info->small_id;
666 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
668 SET_CURRENT_OBJECT (internal);
670 domain = mono_object_domain (thread);
672 mono_thread_push_appdomain_ref (domain);
673 if (!mono_domain_set (domain, force_domain)) {
674 mono_thread_pop_appdomain_ref ();
678 mono_threads_lock ();
680 if (threads_starting_up)
681 mono_g_hash_table_remove (threads_starting_up, thread);
683 if (shutting_down && !force_attach) {
684 mono_threads_unlock ();
685 mono_thread_pop_appdomain_ref ();
690 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
693 /* We don't need to duplicate thread->handle, because it is
694 * only closed when the thread object is finalized by the GC. */
695 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
697 /* We have to do this here because mono_thread_start_cb
698 * requires that root_domain_thread is set up. */
699 if (thread_static_info.offset || thread_static_info.idx > 0) {
700 /* get the current allocated size */
701 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
702 mono_alloc_static_data (&internal->static_data, offset, TRUE);
705 mono_threads_unlock ();
707 root_domain = mono_get_root_domain ();
709 g_assert (!internal->root_domain_thread);
710 if (domain != root_domain)
711 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
713 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
715 if (domain != root_domain)
716 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
718 set_current_thread_for_domain (domain, internal, thread);
720 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
728 MonoObject *start_delegate;
729 MonoObject *start_delegate_arg;
730 MonoThreadStart start_func;
731 gpointer start_func_arg;
732 gboolean force_attach;
734 MonoCoopSem registered;
737 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
740 MonoThreadStart start_func;
741 void *start_func_arg;
744 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
748 MonoInternalThread *internal;
749 MonoObject *start_delegate;
750 MonoObject *start_delegate_arg;
753 thread = start_info->thread;
754 internal = thread->internal_thread;
755 domain = mono_object_domain (start_info->thread);
757 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
759 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
760 start_info->failed = TRUE;
762 mono_coop_sem_post (&start_info->registered);
764 if (InterlockedDecrement (&start_info->ref) == 0) {
765 mono_coop_sem_destroy (&start_info->registered);
772 mono_thread_internal_set_priority (internal, internal->priority);
776 start_delegate = start_info->start_delegate;
777 start_delegate_arg = start_info->start_delegate_arg;
778 start_func = start_info->start_func;
779 start_func_arg = start_info->start_func_arg;
781 /* This MUST be called before any managed code can be
782 * executed, as it calls the callback function that (for the
783 * jit) sets the lmf marker.
786 if (mono_thread_start_cb)
787 mono_thread_start_cb (tid, stack_ptr, start_func);
789 /* On 2.0 profile (and higher), set explicitly since state might have been
791 if (internal->apartment_state == ThreadApartmentState_Unknown)
792 internal->apartment_state = ThreadApartmentState_MTA;
794 mono_thread_init_apartment_state ();
796 /* Let the thread that called Start() know we're ready */
797 mono_coop_sem_post (&start_info->registered);
799 if (InterlockedDecrement (&start_info->ref) == 0) {
800 mono_coop_sem_destroy (&start_info->registered);
804 /* start_info is not valid anymore */
808 * Call this after calling start_notify, since the profiler callback might want
809 * to lock the thread, and the lock is held by thread_start () which waits for
812 mono_profiler_thread_start (tid);
814 /* if the name was set before starting, we didn't invoke the profiler callback */
815 if (internal->name) {
816 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
817 mono_profiler_thread_name (internal->tid, tname);
818 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
822 /* start_func is set only for unmanaged start functions */
824 start_func (start_func_arg);
828 g_assert (start_delegate != NULL);
830 /* we may want to handle the exception here. See comment below on unhandled exceptions */
831 args [0] = (gpointer) start_delegate_arg;
832 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
834 if (!mono_error_ok (&error)) {
835 MonoException *ex = mono_error_convert_to_exception (&error);
837 g_assert (ex != NULL);
838 MonoClass *klass = mono_object_get_class (&ex->object);
839 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
840 !is_threadabort_exception (klass)) {
841 mono_unhandled_exception (&ex->object);
842 mono_invoke_unhandled_exception_hook (&ex->object);
843 g_assert_not_reached ();
846 mono_error_cleanup (&error);
850 /* If the thread calls ExitThread at all, this remaining code
851 * will not be executed, but the main thread will eventually
852 * call mono_thread_detach_internal() on this thread's behalf.
855 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
857 /* Do any cleanup needed for apartment state. This
858 * cannot be done in mono_thread_detach_internal since
859 * mono_thread_detach_internal could be called for a
860 * thread other than the current thread.
861 * mono_thread_cleanup_apartment_state cleans up apartment
862 * for the current thead */
863 mono_thread_cleanup_apartment_state ();
865 mono_thread_detach_internal (internal);
873 start_wrapper (gpointer data)
875 StartInfo *start_info;
876 MonoThreadInfo *info;
879 start_info = (StartInfo*) data;
880 g_assert (start_info);
882 info = mono_thread_info_attach (&res);
883 info->runtime_thread = TRUE;
885 /* Run the actual main function of the thread */
886 res = start_wrapper_internal (start_info, &res);
888 mono_thread_info_exit (res);
890 g_assert_not_reached ();
896 * Common thread creation code.
897 * LOCKING: Acquires the threads lock.
900 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
901 MonoThreadCreateFlags flags, MonoError *error)
903 StartInfo *start_info = NULL;
904 MonoNativeThreadId tid;
906 gsize stack_set_size;
909 g_assert (!start_func && !start_func_arg);
911 g_assert (!start_delegate);
913 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
914 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
915 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
917 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
918 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
919 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
923 * Join joinable threads to prevent running out of threads since the finalizer
924 * thread might be blocked/backlogged.
926 mono_threads_join_threads ();
930 mono_threads_lock ();
931 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
932 mono_threads_unlock ();
935 if (threads_starting_up == NULL) {
936 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
938 mono_g_hash_table_insert (threads_starting_up, thread, thread);
939 mono_threads_unlock ();
941 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
942 if (internal->threadpool_thread)
943 mono_thread_set_state (internal, ThreadState_Background);
945 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
947 start_info = g_new0 (StartInfo, 1);
949 start_info->thread = thread;
950 start_info->start_delegate = start_delegate;
951 start_info->start_delegate_arg = thread->start_obj;
952 start_info->start_func = start_func;
953 start_info->start_func_arg = start_func_arg;
954 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
955 start_info->failed = FALSE;
956 mono_coop_sem_init (&start_info->registered, 0);
958 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
959 stack_set_size = default_stacksize_for_thread (internal);
963 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
964 /* The thread couldn't be created, so set an exception */
965 mono_threads_lock ();
966 mono_g_hash_table_remove (threads_starting_up, thread);
967 mono_threads_unlock ();
968 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
969 /* ref is not going to be decremented in start_wrapper_internal */
970 InterlockedDecrement (&start_info->ref);
975 internal->stack_size = (int) stack_set_size;
977 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
980 * Wait for the thread to set up its TLS data etc, so
981 * theres no potential race condition if someone tries
982 * to look up the data believing the thread has
986 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
988 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));
990 ret = !start_info->failed;
993 if (InterlockedDecrement (&start_info->ref) == 0) {
994 mono_coop_sem_destroy (&start_info->registered);
1001 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1003 if (mono_thread_start_cb) {
1004 mono_thread_start_cb (tid, stack_start, func);
1008 void mono_threads_set_default_stacksize (guint32 stacksize)
1010 default_stacksize = stacksize;
1013 guint32 mono_threads_get_default_stacksize (void)
1015 return default_stacksize;
1019 * mono_thread_create_internal:
1021 * ARG should not be a GC reference.
1024 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1027 MonoInternalThread *internal;
1032 internal = create_internal_thread_object ();
1034 thread = create_thread_object (domain, internal);
1036 LOCK_THREAD (internal);
1038 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1040 UNLOCK_THREAD (internal);
1042 return_val_if_nok (error, NULL);
1047 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1050 if (!mono_thread_create_checked (domain, func, arg, &error))
1051 mono_error_cleanup (&error);
1055 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1057 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1061 mono_thread_attach (MonoDomain *domain)
1063 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1069 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1071 MonoInternalThread *internal;
1073 MonoThreadInfo *info;
1074 MonoNativeThreadId tid;
1077 if (mono_thread_internal_current_is_attached ()) {
1078 if (domain != mono_domain_get ())
1079 mono_domain_set (domain, TRUE);
1080 /* Already attached */
1081 return mono_thread_current ();
1084 info = mono_thread_info_attach (&stack_ptr);
1087 tid=mono_native_thread_id_get ();
1089 internal = create_internal_thread_object ();
1091 thread = create_thread_object (domain, internal);
1093 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1094 /* Mono is shutting down, so just wait for the end */
1096 mono_thread_info_sleep (10000, NULL);
1099 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1101 if (mono_thread_attach_cb) {
1105 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1108 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1110 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1113 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1114 if (!mono_thread_info_current ()->tools_thread)
1115 // FIXME: Need a separate callback
1116 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1122 mono_thread_detach_internal (MonoInternalThread *thread)
1126 g_assert (thread != NULL);
1128 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1131 mono_w32mutex_abandon ();
1134 if (thread->abort_state_handle) {
1135 mono_gchandle_free (thread->abort_state_handle);
1136 thread->abort_state_handle = 0;
1139 thread->abort_exc = NULL;
1140 thread->current_appcontext = NULL;
1143 * thread->synch_cs can be NULL if this was called after
1144 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1145 * This can happen only during shutdown.
1146 * The shutting_down flag is not always set, so we can't assert on it.
1148 if (thread->synch_cs)
1149 LOCK_THREAD (thread);
1151 thread->state |= ThreadState_Stopped;
1152 thread->state &= ~ThreadState_Background;
1154 if (thread->synch_cs)
1155 UNLOCK_THREAD (thread);
1158 An interruption request has leaked to cleanup. Adjust the global counter.
1160 This can happen is the abort source thread finds the abortee (this) thread
1161 in unmanaged code. If this thread never trips back to managed code or check
1162 the local flag it will be left set and positively unbalance the global counter.
1164 Leaving the counter unbalanced will cause a performance degradation since all threads
1165 will now keep checking their local flags all the time.
1167 if (mono_thread_clear_interruption_requested (thread))
1168 InterlockedDecrement (&thread_interruption_requested);
1170 mono_threads_lock ();
1174 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1175 /* We have to check whether the thread object for the
1176 * tid is still the same in the table because the
1177 * thread might have been destroyed and the tid reused
1178 * in the meantime, in which case the tid would be in
1179 * the table, but with another thread object.
1183 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1187 mono_threads_unlock ();
1189 /* Don't close the handle here, wait for the object finalizer
1190 * to do it. Otherwise, the following race condition applies:
1192 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1194 * 2) Some other handle is reassigned the same slot
1196 * 3) Another thread tries to join the first thread, and
1197 * blocks waiting for the reassigned handle to be signalled
1198 * (which might never happen). This is possible, because the
1199 * thread calling Join() still has a reference to the first
1203 /* if the thread is not in the hash it has been removed already */
1205 mono_domain_unset ();
1206 mono_memory_barrier ();
1208 if (mono_thread_cleanup_fn)
1209 mono_thread_cleanup_fn (thread_get_tid (thread));
1214 mono_release_type_locks (thread);
1216 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1217 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1218 mono_profiler_thread_end (thread->tid);
1220 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1223 * This will signal async signal handlers that the thread has exited.
1224 * The profiler callback needs this to be set, so it cannot be done earlier.
1226 mono_domain_unset ();
1227 mono_memory_barrier ();
1229 if (thread == mono_thread_internal_current ())
1230 mono_thread_pop_appdomain_ref ();
1232 mono_free_static_data (thread->static_data);
1233 thread->static_data = NULL;
1234 ref_stack_destroy (thread->appdomain_refs);
1235 thread->appdomain_refs = NULL;
1237 g_assert (thread->suspended);
1238 mono_os_event_destroy (thread->suspended);
1239 g_free (thread->suspended);
1240 thread->suspended = NULL;
1242 if (mono_thread_cleanup_fn)
1243 mono_thread_cleanup_fn (thread_get_tid (thread));
1245 mono_memory_barrier ();
1247 if (mono_gc_is_moving ()) {
1248 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1249 thread->thread_pinning_ref = NULL;
1253 SET_CURRENT_OBJECT (NULL);
1254 mono_domain_unset ();
1256 /* Don't need to close the handle to this thread, even though we took a
1257 * reference in mono_thread_attach (), because the GC will do it
1258 * when the Thread object is finalised.
1263 mono_thread_detach (MonoThread *thread)
1266 mono_thread_detach_internal (thread->internal_thread);
1270 * mono_thread_detach_if_exiting:
1272 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1273 * This should be used at the end of embedding code which calls into managed code, and which
1274 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1277 mono_thread_detach_if_exiting (void)
1279 if (mono_thread_info_is_exiting ()) {
1280 MonoInternalThread *thread;
1282 thread = mono_thread_internal_current ();
1284 mono_thread_detach_internal (thread);
1285 mono_thread_info_detach ();
1293 mono_thread_internal_current_is_attached (void)
1295 MonoInternalThread *internal;
1297 internal = GET_CURRENT_OBJECT ();
1305 mono_thread_exit (void)
1307 MonoInternalThread *thread = mono_thread_internal_current ();
1309 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1311 mono_thread_detach_internal (thread);
1313 /* we could add a callback here for embedders to use. */
1314 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1315 exit (mono_environment_exitcode_get ());
1317 mono_thread_info_exit (0);
1321 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1323 MonoInternalThread *internal;
1325 internal = create_internal_thread_object ();
1327 internal->state = ThreadState_Unstarted;
1329 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1333 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1335 return mono_thread_current ();
1339 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1343 MonoInternalThread *internal;
1346 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1348 if (!this_obj->internal_thread)
1349 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1350 internal = this_obj->internal_thread;
1352 LOCK_THREAD (internal);
1354 if ((internal->state & ThreadState_Unstarted) == 0) {
1355 UNLOCK_THREAD (internal);
1356 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1360 if ((internal->state & ThreadState_Aborted) != 0) {
1361 UNLOCK_THREAD (internal);
1365 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1367 mono_error_cleanup (&error);
1368 UNLOCK_THREAD (internal);
1372 internal->state &= ~ThreadState_Unstarted;
1374 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1376 UNLOCK_THREAD (internal);
1377 return internal->handle;
1381 * This is called from the finalizer of the internal thread object.
1384 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1386 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1389 * Since threads keep a reference to their thread object while running, by
1390 * the time this function is called, the thread has already exited/detached,
1391 * i.e. mono_thread_detach_internal () has ran. The exception is during
1392 * shutdown, when mono_thread_detach_internal () can be called after this.
1394 if (this_obj->handle) {
1395 mono_threads_close_thread_handle (this_obj->handle);
1396 this_obj->handle = NULL;
1400 CloseHandle (this_obj->native_handle);
1403 if (this_obj->synch_cs) {
1404 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1405 this_obj->synch_cs = NULL;
1406 mono_coop_mutex_destroy (synch_cs);
1410 if (this_obj->name) {
1411 void *name = this_obj->name;
1412 this_obj->name = NULL;
1418 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1421 MonoInternalThread *thread = mono_thread_internal_current ();
1423 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1425 if (mono_thread_current_check_pending_interrupt ())
1429 gboolean alerted = FALSE;
1431 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1433 res = mono_thread_info_sleep (ms, &alerted);
1435 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1438 MonoException* exc = mono_thread_execute_interruption ();
1440 mono_raise_exception (exc);
1442 // FIXME: !MONO_INFINITE_WAIT
1443 if (ms != MONO_INFINITE_WAIT)
1452 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1457 ves_icall_System_Threading_Thread_GetDomainID (void)
1459 return mono_domain_get()->domain_id;
1463 ves_icall_System_Threading_Thread_Yield (void)
1465 return mono_thread_info_yield ();
1469 * mono_thread_get_name:
1471 * Return the name of the thread. NAME_LEN is set to the length of the name.
1472 * Return NULL if the thread has no name. The returned memory is owned by the
1476 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1480 LOCK_THREAD (this_obj);
1482 if (!this_obj->name) {
1486 *name_len = this_obj->name_len;
1487 res = g_new (gunichar2, this_obj->name_len);
1488 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1491 UNLOCK_THREAD (this_obj);
1497 * mono_thread_get_name_utf8:
1499 * Return the name of the thread in UTF-8.
1500 * Return NULL if the thread has no name.
1501 * The returned memory is owned by the caller.
1504 mono_thread_get_name_utf8 (MonoThread *thread)
1509 MonoInternalThread *internal = thread->internal_thread;
1510 if (internal == NULL)
1513 LOCK_THREAD (internal);
1515 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1517 UNLOCK_THREAD (internal);
1523 * mono_thread_get_managed_id:
1525 * Return the Thread.ManagedThreadId value of `thread`.
1526 * Returns -1 if `thread` is NULL.
1529 mono_thread_get_managed_id (MonoThread *thread)
1534 MonoInternalThread *internal = thread->internal_thread;
1535 if (internal == NULL)
1538 int32_t id = internal->managed_id;
1544 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1549 error_init (&error);
1551 LOCK_THREAD (this_obj);
1553 if (!this_obj->name)
1556 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1558 UNLOCK_THREAD (this_obj);
1560 if (mono_error_set_pending_exception (&error))
1567 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1569 LOCK_THREAD (this_obj);
1574 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1575 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1576 UNLOCK_THREAD (this_obj);
1578 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1581 if (this_obj->name) {
1582 g_free (this_obj->name);
1583 this_obj->name_len = 0;
1586 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1587 this_obj->name_len = mono_string_length (name);
1590 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1593 this_obj->name = NULL;
1596 UNLOCK_THREAD (this_obj);
1598 if (this_obj->name && this_obj->tid) {
1599 char *tname = mono_string_to_utf8_checked (name, error);
1600 return_if_nok (error);
1601 mono_profiler_thread_name (this_obj->tid, tname);
1602 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1608 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1611 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1612 mono_error_set_pending_exception (&error);
1616 * ves_icall_System_Threading_Thread_GetPriority_internal:
1617 * @param this_obj: The MonoInternalThread on which to operate.
1619 * Gets the priority of the given thread.
1620 * @return: The priority of the given thread.
1623 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1626 MonoInternalThread *internal = this_obj->internal_thread;
1628 LOCK_THREAD (internal);
1629 priority = internal->priority;
1630 UNLOCK_THREAD (internal);
1636 * ves_icall_System_Threading_Thread_SetPriority_internal:
1637 * @param this_obj: The MonoInternalThread on which to operate.
1638 * @param priority: The priority to set.
1640 * Sets the priority of the given thread.
1643 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1645 MonoInternalThread *internal = this_obj->internal_thread;
1647 LOCK_THREAD (internal);
1648 internal->priority = priority;
1649 if (internal->thread_info != NULL)
1650 mono_thread_internal_set_priority (internal, priority);
1651 UNLOCK_THREAD (internal);
1654 /* If the array is already in the requested domain, we just return it,
1655 otherwise we return a copy in that domain. */
1657 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1665 if (mono_object_domain (arr) == domain)
1668 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1669 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1674 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1677 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1678 mono_error_set_pending_exception (&error);
1683 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1686 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1687 mono_error_set_pending_exception (&error);
1692 mono_thread_current (void)
1694 MonoDomain *domain = mono_domain_get ();
1695 MonoInternalThread *internal = mono_thread_internal_current ();
1696 MonoThread **current_thread_ptr;
1698 g_assert (internal);
1699 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1701 if (!*current_thread_ptr) {
1702 g_assert (domain != mono_get_root_domain ());
1703 *current_thread_ptr = create_thread_object (domain, internal);
1705 return *current_thread_ptr;
1708 /* Return the thread object belonging to INTERNAL in the current domain */
1710 mono_thread_current_for_thread (MonoInternalThread *internal)
1712 MonoDomain *domain = mono_domain_get ();
1713 MonoThread **current_thread_ptr;
1715 g_assert (internal);
1716 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1718 if (!*current_thread_ptr) {
1719 g_assert (domain != mono_get_root_domain ());
1720 *current_thread_ptr = create_thread_object (domain, internal);
1722 return *current_thread_ptr;
1726 mono_thread_internal_current (void)
1728 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1729 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1733 static MonoThreadInfoWaitRet
1734 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1737 MonoThreadInfoWaitRet ret;
1744 start = (ms == -1) ? 0 : mono_msec_ticks ();
1747 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1750 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1753 exc = mono_thread_execute_interruption ();
1755 mono_error_set_exception_instance (error, exc);
1762 /* Re-calculate ms according to the time passed */
1763 diff_ms = (gint32)(mono_msec_ticks () - start);
1764 if (diff_ms >= ms) {
1765 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1768 wait = ms - diff_ms;
1775 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1777 MonoInternalThread *thread = this_obj->internal_thread;
1778 MonoThreadHandle *handle = thread->handle;
1779 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1783 if (mono_thread_current_check_pending_interrupt ())
1786 LOCK_THREAD (thread);
1788 if ((thread->state & ThreadState_Unstarted) != 0) {
1789 UNLOCK_THREAD (thread);
1791 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1795 UNLOCK_THREAD (thread);
1798 ms=MONO_INFINITE_WAIT;
1800 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1802 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1804 ret=mono_join_uninterrupted (handle, ms, &error);
1806 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1808 mono_error_set_pending_exception (&error);
1810 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1811 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1816 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1821 #define MANAGED_WAIT_FAILED 0x7fffffff
1824 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1826 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1827 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1828 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1829 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1830 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1831 return WAIT_IO_COMPLETION;
1832 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1833 return WAIT_TIMEOUT;
1834 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1835 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1836 return MANAGED_WAIT_FAILED;
1838 g_error ("%s: unknown val value %d", __func__, val);
1842 static MonoW32HandleWaitRet
1843 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1846 MonoW32HandleWaitRet ret;
1853 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1857 if (numhandles != 1)
1858 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1860 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1862 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1863 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1864 #endif /* HOST_WIN32 */
1867 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1870 exc = mono_thread_execute_interruption ();
1872 mono_error_set_exception_instance (error, exc);
1879 /* Re-calculate ms according to the time passed */
1880 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1881 if (diff_ms >= ms) {
1882 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1885 wait = ms - diff_ms;
1891 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1896 MonoW32HandleWaitRet ret;
1898 MonoObject *waitHandle;
1899 MonoInternalThread *thread = mono_thread_internal_current ();
1901 /* Do this WaitSleepJoin check before creating objects */
1902 if (mono_thread_current_check_pending_interrupt ())
1903 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1905 /* We fail in managed if the array has more than 64 elements */
1906 numhandles = (guint32)mono_array_length(mono_handles);
1907 handles = g_new0(HANDLE, numhandles);
1909 for(i = 0; i < numhandles; i++) {
1910 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1911 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1915 ms=MONO_INFINITE_WAIT;
1918 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1920 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1922 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1926 mono_error_set_pending_exception (&error);
1928 return map_native_wait_result_to_managed (ret, numhandles);
1931 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1934 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1935 uintptr_t numhandles;
1936 MonoW32HandleWaitRet ret;
1938 MonoObject *waitHandle;
1939 MonoInternalThread *thread = mono_thread_internal_current ();
1941 /* Do this WaitSleepJoin check before creating objects */
1942 if (mono_thread_current_check_pending_interrupt ())
1943 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1945 numhandles = mono_array_length(mono_handles);
1946 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1947 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1949 for(i = 0; i < numhandles; i++) {
1950 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1951 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1955 ms=MONO_INFINITE_WAIT;
1958 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1960 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1962 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1964 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1966 mono_error_set_pending_exception (&error);
1968 return map_native_wait_result_to_managed (ret, numhandles);
1971 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1974 MonoW32HandleWaitRet ret;
1975 MonoInternalThread *thread = mono_thread_internal_current ();
1977 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1980 ms=MONO_INFINITE_WAIT;
1983 if (mono_thread_current_check_pending_interrupt ())
1984 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1986 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1988 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1990 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1992 mono_error_set_pending_exception (&error);
1993 return map_native_wait_result_to_managed (ret, 1);
1997 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1999 MonoW32HandleWaitRet ret;
2000 MonoInternalThread *thread = mono_thread_internal_current ();
2003 ms = MONO_INFINITE_WAIT;
2005 if (mono_thread_current_check_pending_interrupt ())
2006 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2008 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2012 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2014 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2018 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2020 return map_native_wait_result_to_managed (ret, 1);
2023 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2025 return InterlockedIncrement (location);
2028 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2030 #if SIZEOF_VOID_P == 4
2031 if (G_UNLIKELY ((size_t)location & 0x7)) {
2033 mono_interlocked_lock ();
2036 mono_interlocked_unlock ();
2040 return InterlockedIncrement64 (location);
2043 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2045 return InterlockedDecrement(location);
2048 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2050 #if SIZEOF_VOID_P == 4
2051 if (G_UNLIKELY ((size_t)location & 0x7)) {
2053 mono_interlocked_lock ();
2056 mono_interlocked_unlock ();
2060 return InterlockedDecrement64 (location);
2063 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2065 return InterlockedExchange(location, value);
2068 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2071 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2072 mono_gc_wbarrier_generic_nostore (location);
2076 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2078 return InterlockedExchangePointer(location, value);
2081 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2083 IntFloatUnion val, ret;
2086 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2092 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2094 #if SIZEOF_VOID_P == 4
2095 if (G_UNLIKELY ((size_t)location & 0x7)) {
2097 mono_interlocked_lock ();
2100 mono_interlocked_unlock ();
2104 return InterlockedExchange64 (location, value);
2108 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2110 LongDoubleUnion val, ret;
2113 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2118 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2120 return InterlockedCompareExchange(location, value, comparand);
2123 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2125 gint32 r = InterlockedCompareExchange(location, value, comparand);
2126 *success = r == comparand;
2130 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2133 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2134 mono_gc_wbarrier_generic_nostore (location);
2138 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2140 return InterlockedCompareExchangePointer(location, value, comparand);
2143 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2145 IntFloatUnion val, ret, cmp;
2148 cmp.fval = comparand;
2149 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2155 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2157 #if SIZEOF_VOID_P == 8
2158 LongDoubleUnion val, comp, ret;
2161 comp.fval = comparand;
2162 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2168 mono_interlocked_lock ();
2170 if (old == comparand)
2172 mono_interlocked_unlock ();
2179 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2181 #if SIZEOF_VOID_P == 4
2182 if (G_UNLIKELY ((size_t)location & 0x7)) {
2184 mono_interlocked_lock ();
2186 if (old == comparand)
2188 mono_interlocked_unlock ();
2192 return InterlockedCompareExchange64 (location, value, comparand);
2196 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2199 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2200 mono_gc_wbarrier_generic_nostore (location);
2205 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2208 MONO_CHECK_NULL (location, NULL);
2209 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2210 mono_gc_wbarrier_generic_nostore (location);
2215 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2217 return InterlockedAdd (location, value);
2221 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2223 #if SIZEOF_VOID_P == 4
2224 if (G_UNLIKELY ((size_t)location & 0x7)) {
2226 mono_interlocked_lock ();
2229 mono_interlocked_unlock ();
2233 return InterlockedAdd64 (location, value);
2237 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2239 #if SIZEOF_VOID_P == 4
2240 if (G_UNLIKELY ((size_t)location & 0x7)) {
2242 mono_interlocked_lock ();
2244 mono_interlocked_unlock ();
2248 return InterlockedRead64 (location);
2252 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2254 mono_memory_barrier ();
2258 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2260 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2262 if (state & ThreadState_Background) {
2263 /* If the thread changes the background mode, the main thread has to
2264 * be notified, since it has to rebuild the list of threads to
2267 mono_os_event_set (&background_change_event);
2272 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2274 mono_thread_set_state (this_obj, (MonoThreadState)state);
2276 if (state & ThreadState_Background) {
2277 /* If the thread changes the background mode, the main thread has to
2278 * be notified, since it has to rebuild the list of threads to
2281 mono_os_event_set (&background_change_event);
2286 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2290 LOCK_THREAD (this_obj);
2292 state = this_obj->state;
2294 UNLOCK_THREAD (this_obj);
2299 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2301 MonoInternalThread *current;
2303 MonoInternalThread *thread = this_obj->internal_thread;
2305 LOCK_THREAD (thread);
2307 current = mono_thread_internal_current ();
2309 thread->thread_interrupt_requested = TRUE;
2310 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2312 UNLOCK_THREAD (thread);
2315 async_abort_internal (thread, FALSE);
2320 * mono_thread_current_check_pending_interrupt:
2322 * Checks if there's a interruption request and set the pending exception if so.
2324 * @returns true if a pending exception was set
2327 mono_thread_current_check_pending_interrupt (void)
2329 MonoInternalThread *thread = mono_thread_internal_current ();
2330 gboolean throw_ = FALSE;
2332 LOCK_THREAD (thread);
2334 if (thread->thread_interrupt_requested) {
2336 thread->thread_interrupt_requested = FALSE;
2339 UNLOCK_THREAD (thread);
2342 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2347 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2349 LOCK_THREAD (thread);
2351 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2353 UNLOCK_THREAD (thread);
2357 if ((thread->state & ThreadState_Unstarted) != 0) {
2358 thread->state |= ThreadState_Aborted;
2359 UNLOCK_THREAD (thread);
2363 thread->state |= ThreadState_AbortRequested;
2364 if (thread->abort_state_handle)
2365 mono_gchandle_free (thread->abort_state_handle);
2367 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2368 g_assert (thread->abort_state_handle);
2370 thread->abort_state_handle = 0;
2372 thread->abort_exc = NULL;
2374 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));
2376 /* During shutdown, we can't wait for other threads */
2378 /* Make sure the thread is awake */
2379 mono_thread_resume (thread);
2381 UNLOCK_THREAD (thread);
2386 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2388 if (!request_thread_abort (thread, state))
2391 if (thread == mono_thread_internal_current ()) {
2393 self_abort_internal (&error);
2394 mono_error_set_pending_exception (&error);
2396 async_abort_internal (thread, TRUE);
2401 * mono_thread_internal_abort:
2403 * Request thread @thread to be aborted.
2405 * @thread MUST NOT be the current thread.
2408 mono_thread_internal_abort (MonoInternalThread *thread)
2410 g_assert (thread != mono_thread_internal_current ());
2412 if (!request_thread_abort (thread, NULL))
2414 async_abort_internal (thread, TRUE);
2418 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2420 MonoInternalThread *thread = mono_thread_internal_current ();
2421 gboolean was_aborting;
2423 LOCK_THREAD (thread);
2424 was_aborting = thread->state & ThreadState_AbortRequested;
2425 thread->state &= ~ThreadState_AbortRequested;
2426 UNLOCK_THREAD (thread);
2428 if (!was_aborting) {
2429 const char *msg = "Unable to reset abort because no abort was requested";
2430 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2434 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2435 thread->abort_exc = NULL;
2436 if (thread->abort_state_handle) {
2437 mono_gchandle_free (thread->abort_state_handle);
2438 /* This is actually not necessary - the handle
2439 only counts if the exception is set */
2440 thread->abort_state_handle = 0;
2445 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2447 LOCK_THREAD (thread);
2449 thread->state &= ~ThreadState_AbortRequested;
2451 if (thread->abort_exc) {
2452 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2453 thread->abort_exc = NULL;
2454 if (thread->abort_state_handle) {
2455 mono_gchandle_free (thread->abort_state_handle);
2456 /* This is actually not necessary - the handle
2457 only counts if the exception is set */
2458 thread->abort_state_handle = 0;
2462 UNLOCK_THREAD (thread);
2466 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2469 MonoInternalThread *thread = this_obj->internal_thread;
2470 MonoObject *state, *deserialized = NULL;
2473 if (!thread->abort_state_handle)
2476 state = mono_gchandle_get_target (thread->abort_state_handle);
2479 domain = mono_domain_get ();
2480 if (mono_object_domain (state) == domain)
2483 deserialized = mono_object_xdomain_representation (state, domain, &error);
2485 if (!deserialized) {
2486 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2487 if (!is_ok (&error)) {
2488 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2489 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2491 mono_set_pending_exception (invalid_op_exc);
2495 return deserialized;
2499 mono_thread_suspend (MonoInternalThread *thread)
2501 LOCK_THREAD (thread);
2503 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2505 UNLOCK_THREAD (thread);
2509 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2511 UNLOCK_THREAD (thread);
2515 thread->state |= ThreadState_SuspendRequested;
2516 mono_os_event_reset (thread->suspended);
2518 if (thread == mono_thread_internal_current ()) {
2519 /* calls UNLOCK_THREAD (thread) */
2520 self_suspend_internal ();
2522 /* calls UNLOCK_THREAD (thread) */
2523 async_suspend_internal (thread, FALSE);
2530 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2532 if (!mono_thread_suspend (this_obj->internal_thread)) {
2533 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2538 /* LOCKING: LOCK_THREAD(thread) must be held */
2540 mono_thread_resume (MonoInternalThread *thread)
2542 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2543 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2544 thread->state &= ~ThreadState_SuspendRequested;
2545 mono_os_event_set (thread->suspended);
2549 if ((thread->state & ThreadState_Suspended) == 0 ||
2550 (thread->state & ThreadState_Unstarted) != 0 ||
2551 (thread->state & ThreadState_Aborted) != 0 ||
2552 (thread->state & ThreadState_Stopped) != 0)
2554 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2558 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2560 mono_os_event_set (thread->suspended);
2562 if (!thread->self_suspended) {
2563 UNLOCK_THREAD (thread);
2565 /* Awake the thread */
2566 if (!mono_thread_info_resume (thread_get_tid (thread)))
2569 LOCK_THREAD (thread);
2572 thread->state &= ~ThreadState_Suspended;
2578 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2580 if (!thread->internal_thread) {
2581 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2583 LOCK_THREAD (thread->internal_thread);
2584 if (!mono_thread_resume (thread->internal_thread))
2585 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2586 UNLOCK_THREAD (thread->internal_thread);
2591 mono_threads_is_critical_method (MonoMethod *method)
2593 switch (method->wrapper_type) {
2594 case MONO_WRAPPER_RUNTIME_INVOKE:
2595 case MONO_WRAPPER_XDOMAIN_INVOKE:
2596 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2603 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2608 if (mono_threads_is_critical_method (m)) {
2609 *((gboolean*)data) = TRUE;
2616 is_running_protected_wrapper (void)
2618 gboolean found = FALSE;
2619 mono_stack_walk (find_wrapper, &found);
2624 mono_thread_stop (MonoThread *thread)
2626 MonoInternalThread *internal = thread->internal_thread;
2628 if (!request_thread_abort (internal, NULL))
2631 if (internal == mono_thread_internal_current ()) {
2633 self_abort_internal (&error);
2635 This function is part of the embeding API and has no way to return the exception
2636 to be thrown. So what we do is keep the old behavior and raise the exception.
2638 mono_error_raise_exception (&error); /* OK to throw, see note */
2640 async_abort_internal (internal, TRUE);
2645 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2647 gint8 tmp = *(volatile gint8 *)ptr;
2648 mono_memory_barrier ();
2653 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2655 gint16 tmp = *(volatile gint16 *)ptr;
2656 mono_memory_barrier ();
2661 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2663 gint32 tmp = *(volatile gint32 *)ptr;
2664 mono_memory_barrier ();
2669 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2671 gint64 tmp = *(volatile gint64 *)ptr;
2672 mono_memory_barrier ();
2677 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2679 volatile void *tmp = *(volatile void **)ptr;
2680 mono_memory_barrier ();
2681 return (void *) tmp;
2685 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2687 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2688 mono_memory_barrier ();
2689 return (MonoObject *) tmp;
2693 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2695 double tmp = *(volatile double *)ptr;
2696 mono_memory_barrier ();
2701 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2703 float tmp = *(volatile float *)ptr;
2704 mono_memory_barrier ();
2709 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2711 return InterlockedRead8 ((volatile gint8 *)ptr);
2715 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2717 return InterlockedRead16 ((volatile gint16 *)ptr);
2721 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2723 return InterlockedRead ((volatile gint32 *)ptr);
2727 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2729 #if SIZEOF_VOID_P == 4
2730 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2732 mono_interlocked_lock ();
2733 val = *(gint64*)ptr;
2734 mono_interlocked_unlock ();
2738 return InterlockedRead64 ((volatile gint64 *)ptr);
2742 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2744 return InterlockedReadPointer ((volatile gpointer *)ptr);
2748 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2752 #if SIZEOF_VOID_P == 4
2753 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2755 mono_interlocked_lock ();
2756 val = *(double*)ptr;
2757 mono_interlocked_unlock ();
2762 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2768 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2772 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2778 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2780 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2784 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2786 mono_memory_barrier ();
2787 *(volatile gint8 *)ptr = value;
2791 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2793 mono_memory_barrier ();
2794 *(volatile gint16 *)ptr = value;
2798 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2800 mono_memory_barrier ();
2801 *(volatile gint32 *)ptr = value;
2805 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2807 mono_memory_barrier ();
2808 *(volatile gint64 *)ptr = value;
2812 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2814 mono_memory_barrier ();
2815 *(volatile void **)ptr = value;
2819 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2821 mono_memory_barrier ();
2822 mono_gc_wbarrier_generic_store (ptr, value);
2826 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2828 mono_memory_barrier ();
2829 *(volatile double *)ptr = value;
2833 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2835 mono_memory_barrier ();
2836 *(volatile float *)ptr = value;
2840 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2842 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2846 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2848 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2852 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2854 InterlockedWrite ((volatile gint32 *)ptr, value);
2858 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2860 #if SIZEOF_VOID_P == 4
2861 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2862 mono_interlocked_lock ();
2863 *(gint64*)ptr = value;
2864 mono_interlocked_unlock ();
2869 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2873 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2875 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2879 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2883 #if SIZEOF_VOID_P == 4
2884 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2885 mono_interlocked_lock ();
2886 *(double*)ptr = value;
2887 mono_interlocked_unlock ();
2894 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2898 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2904 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2908 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2910 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2914 free_context (void *user_data)
2916 ContextStaticData *data = user_data;
2918 mono_threads_lock ();
2921 * There is no guarantee that, by the point this reference queue callback
2922 * has been invoked, the GC handle associated with the object will fail to
2923 * resolve as one might expect. So if we don't free and remove the GC
2924 * handle here, free_context_static_data_helper () could end up resolving
2925 * a GC handle to an actually-dead context which would contain a pointer
2926 * to an already-freed static data segment, resulting in a crash when
2929 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2931 mono_threads_unlock ();
2933 mono_gchandle_free (data->gc_handle);
2934 mono_free_static_data (data->static_data);
2939 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2941 mono_threads_lock ();
2943 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2946 contexts = g_hash_table_new (NULL, NULL);
2949 context_queue = mono_gc_reference_queue_new (free_context);
2951 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2952 g_hash_table_insert (contexts, gch, gch);
2955 * We use this intermediate structure to contain a duplicate pointer to
2956 * the static data because we can't rely on being able to resolve the GC
2957 * handle in the reference queue callback.
2959 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2960 data->gc_handle = GPOINTER_TO_UINT (gch);
2963 context_adjust_static_data (ctx);
2964 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2966 mono_threads_unlock ();
2968 mono_profiler_context_loaded (ctx);
2972 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2975 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2976 * cleanup in exceptional circumstances, we don't actually do any
2977 * cleanup work here. We instead do this via a reference queue.
2980 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2982 mono_profiler_context_unloaded (ctx);
2985 void mono_thread_init (MonoThreadStartCB start_cb,
2986 MonoThreadAttachCB attach_cb)
2988 mono_coop_mutex_init_recursive (&threads_mutex);
2990 mono_os_mutex_init_recursive(&interlocked_mutex);
2991 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2993 mono_os_event_init (&background_change_event, FALSE);
2995 mono_init_static_data_info (&thread_static_info);
2996 mono_init_static_data_info (&context_static_info);
2998 mono_thread_start_cb = start_cb;
2999 mono_thread_attach_cb = attach_cb;
3002 void mono_thread_cleanup (void)
3004 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3005 /* The main thread must abandon any held mutexes (particularly
3006 * important for named mutexes as they are shared across
3007 * processes, see bug 74680.) This will happen when the
3008 * thread exits, but if it's not running in a subthread it
3009 * won't exit in time.
3011 mono_w32mutex_abandon ();
3015 /* This stuff needs more testing, it seems one of these
3016 * critical sections can be locked when mono_thread_cleanup is
3019 mono_coop_mutex_destroy (&threads_mutex);
3020 mono_os_mutex_destroy (&interlocked_mutex);
3021 mono_os_mutex_destroy (&delayed_free_table_mutex);
3022 mono_os_mutex_destroy (&small_id_mutex);
3023 mono_os_event_destroy (&background_change_event);
3028 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3030 mono_thread_cleanup_fn = func;
3034 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3036 thread->internal_thread->manage_callback = func;
3040 static void print_tids (gpointer key, gpointer value, gpointer user)
3042 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3043 * sizeof(uint) and a cast to uint would overflow
3045 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3046 * print this as a pointer.
3048 g_message ("Waiting for: %p", key);
3053 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3054 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3059 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3062 MonoThreadInfoWaitRet ret;
3064 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3066 /* Add the thread state change event, so it wakes
3067 * up if a thread changes to background mode. */
3070 if (check_state_change)
3071 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3073 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3076 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3077 /* See the comment in build_wait_tids() */
3078 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3082 for( i = 0; i < wait->num; i++)
3083 mono_threads_close_thread_handle (wait->handles [i]);
3085 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3088 if (ret < wait->num) {
3089 MonoInternalThread *internal;
3091 internal = wait->threads [ret];
3093 mono_threads_lock ();
3094 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3095 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3096 mono_threads_unlock ();
3100 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3102 struct wait_data *wait=(struct wait_data *)user;
3104 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3105 MonoInternalThread *thread=(MonoInternalThread *)value;
3107 /* Ignore background threads, we abort them later */
3108 /* Do not lock here since it is not needed and the caller holds threads_lock */
3109 if (thread->state & ThreadState_Background) {
3110 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3111 return; /* just leave, ignore */
3114 if (mono_gc_is_finalizer_internal_thread (thread)) {
3115 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3119 if (thread == mono_thread_internal_current ()) {
3120 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3124 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3125 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3129 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3130 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3134 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3135 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3136 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3137 wait->threads[wait->num]=thread;
3140 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3142 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3147 /* Just ignore the rest, we can't do anything with
3154 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3156 struct wait_data *wait=(struct wait_data *)user;
3157 MonoNativeThreadId self = mono_native_thread_id_get ();
3158 MonoInternalThread *thread = (MonoInternalThread *)value;
3160 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3163 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3165 if (mono_gc_is_finalizer_internal_thread (thread))
3168 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3169 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3170 wait->threads[wait->num] = thread;
3173 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3174 mono_thread_internal_abort (thread);
3181 * mono_threads_set_shutting_down:
3183 * Is called by a thread that wants to shut down Mono. If the runtime is already
3184 * shutting down, the calling thread is suspended/stopped, and this function never
3188 mono_threads_set_shutting_down (void)
3190 MonoInternalThread *current_thread = mono_thread_internal_current ();
3192 mono_threads_lock ();
3194 if (shutting_down) {
3195 mono_threads_unlock ();
3197 /* Make sure we're properly suspended/stopped */
3199 LOCK_THREAD (current_thread);
3201 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3202 UNLOCK_THREAD (current_thread);
3203 mono_thread_execute_interruption ();
3205 UNLOCK_THREAD (current_thread);
3208 /*since we're killing the thread, detach it.*/
3209 mono_thread_detach_internal (current_thread);
3211 /* Wake up other threads potentially waiting for us */
3212 mono_thread_info_exit (0);
3214 shutting_down = TRUE;
3216 /* Not really a background state change, but this will
3217 * interrupt the main thread if it is waiting for all
3218 * the other threads.
3220 mono_os_event_set (&background_change_event);
3222 mono_threads_unlock ();
3226 void mono_thread_manage (void)
3228 struct wait_data wait_data;
3229 struct wait_data *wait = &wait_data;
3231 memset (wait, 0, sizeof (struct wait_data));
3232 /* join each thread that's still running */
3233 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3235 mono_threads_lock ();
3237 THREAD_DEBUG (g_message("%s: No threads", __func__));
3238 mono_threads_unlock ();
3241 mono_threads_unlock ();
3244 mono_threads_lock ();
3245 if (shutting_down) {
3246 /* somebody else is shutting down */
3247 mono_threads_unlock ();
3250 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3251 mono_g_hash_table_foreach (threads, print_tids, NULL));
3253 mono_os_event_reset (&background_change_event);
3255 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3256 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3257 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3258 mono_threads_unlock ();
3260 /* Something to wait for */
3261 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3262 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3263 } while(wait->num>0);
3265 /* Mono is shutting down, so just wait for the end */
3266 if (!mono_runtime_try_shutdown ()) {
3267 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3268 mono_thread_suspend (mono_thread_internal_current ());
3269 mono_thread_execute_interruption ();
3273 * Remove everything but the finalizer thread and self.
3274 * Also abort all the background threads
3277 mono_threads_lock ();
3280 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3281 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3282 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3284 mono_threads_unlock ();
3286 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3287 if (wait->num > 0) {
3288 /* Something to wait for */
3289 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3291 } while (wait->num > 0);
3294 * give the subthreads a chance to really quit (this is mainly needed
3295 * to get correct user and system times from getrusage/wait/time(1)).
3296 * This could be removed if we avoid pthread_detach() and use pthread_join().
3298 mono_thread_info_yield ();
3302 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3304 MonoInternalThread *thread = (MonoInternalThread*)value;
3305 struct wait_data *wait = (struct wait_data*)user_data;
3308 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3310 * This needs no locking.
3312 if ((thread->state & ThreadState_Suspended) != 0 ||
3313 (thread->state & ThreadState_Stopped) != 0)
3316 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3317 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3318 wait->threads [wait->num] = thread;
3324 * mono_thread_suspend_all_other_threads:
3326 * Suspend all managed threads except the finalizer thread and this thread. It is
3327 * not possible to resume them later.
3329 void mono_thread_suspend_all_other_threads (void)
3331 struct wait_data wait_data;
3332 struct wait_data *wait = &wait_data;
3334 MonoNativeThreadId self = mono_native_thread_id_get ();
3335 guint32 eventidx = 0;
3336 gboolean starting, finished;
3338 memset (wait, 0, sizeof (struct wait_data));
3340 * The other threads could be in an arbitrary state at this point, i.e.
3341 * they could be starting up, shutting down etc. This means that there could be
3342 * threads which are not even in the threads hash table yet.
3346 * First we set a barrier which will be checked by all threads before they
3347 * are added to the threads hash table, and they will exit if the flag is set.
3348 * This ensures that no threads could be added to the hash later.
3349 * We will use shutting_down as the barrier for now.
3351 g_assert (shutting_down);
3354 * We make multiple calls to WaitForMultipleObjects since:
3355 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3356 * - some threads could exit without becoming suspended
3361 * Make a copy of the hashtable since we can't do anything with
3362 * threads while threads_mutex is held.
3365 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3366 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3367 mono_threads_lock ();
3368 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3369 mono_threads_unlock ();
3372 /* Get the suspended events that we'll be waiting for */
3373 for (i = 0; i < wait->num; ++i) {
3374 MonoInternalThread *thread = wait->threads [i];
3376 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3377 || mono_gc_is_finalizer_internal_thread (thread)
3378 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3380 mono_threads_close_thread_handle (wait->handles [i]);
3381 wait->threads [i] = NULL;
3385 LOCK_THREAD (thread);
3387 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3388 UNLOCK_THREAD (thread);
3389 mono_threads_close_thread_handle (wait->handles [i]);
3390 wait->threads [i] = NULL;
3396 /* Convert abort requests into suspend requests */
3397 if ((thread->state & ThreadState_AbortRequested) != 0)
3398 thread->state &= ~ThreadState_AbortRequested;
3400 thread->state |= ThreadState_SuspendRequested;
3401 mono_os_event_reset (thread->suspended);
3403 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3404 async_suspend_internal (thread, TRUE);
3406 mono_threads_close_thread_handle (wait->handles [i]);
3407 wait->threads [i] = NULL;
3409 if (eventidx <= 0) {
3411 * If there are threads which are starting up, we wait until they
3412 * are suspended when they try to register in the threads hash.
3413 * This is guaranteed to finish, since the threads which can create new
3414 * threads get suspended after a while.
3415 * FIXME: The finalizer thread can still create new threads.
3417 mono_threads_lock ();
3418 if (threads_starting_up)
3419 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3422 mono_threads_unlock ();
3424 mono_thread_info_sleep (100, NULL);
3432 MonoInternalThread *thread;
3433 MonoStackFrameInfo *frames;
3434 int nframes, max_frames;
3435 int nthreads, max_threads;
3436 MonoInternalThread **threads;
3437 } ThreadDumpUserData;
3439 static gboolean thread_dump_requested;
3441 /* This needs to be async safe */
3443 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3445 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3447 if (ud->nframes < ud->max_frames) {
3448 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3455 /* This needs to be async safe */
3456 static SuspendThreadResult
3457 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3459 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3460 MonoInternalThread *thread = user_data->thread;
3463 /* This no longer works with remote unwinding */
3464 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3465 mono_thread_internal_describe (thread, text);
3466 g_string_append (text, "\n");
3469 if (thread == mono_thread_internal_current ())
3470 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3472 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3474 return MonoResumeThread;
3478 int nthreads, max_threads;
3479 MonoInternalThread **threads;
3480 } CollectThreadsUserData;
3483 collect_thread (gpointer key, gpointer value, gpointer user)
3485 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3486 MonoInternalThread *thread = (MonoInternalThread *)value;
3488 if (ud->nthreads < ud->max_threads)
3489 ud->threads [ud->nthreads ++] = thread;
3493 * Collect running threads into the THREADS array.
3494 * THREADS should be an array allocated on the stack.
3497 collect_threads (MonoInternalThread **thread_array, int max_threads)
3499 CollectThreadsUserData ud;
3501 memset (&ud, 0, sizeof (ud));
3502 /* This array contains refs, but its on the stack, so its ok */
3503 ud.threads = thread_array;
3504 ud.max_threads = max_threads;
3506 mono_threads_lock ();
3507 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3508 mono_threads_unlock ();
3514 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3516 GString* text = g_string_new (0);
3518 GError *error = NULL;
3521 ud->thread = thread;
3524 /* Collect frames for the thread */
3525 if (thread == mono_thread_internal_current ()) {
3526 get_thread_dump (mono_thread_info_current (), ud);
3528 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3532 * Do all the non async-safe work outside of get_thread_dump.
3535 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3537 g_string_append_printf (text, "\n\"%s\"", name);
3540 else if (thread->threadpool_thread) {
3541 g_string_append (text, "\n\"<threadpool thread>\"");
3543 g_string_append (text, "\n\"<unnamed thread>\"");
3546 for (i = 0; i < ud->nframes; ++i) {
3547 MonoStackFrameInfo *frame = &ud->frames [i];
3548 MonoMethod *method = NULL;
3550 if (frame->type == FRAME_TYPE_MANAGED)
3551 method = mono_jit_info_get_method (frame->ji);
3554 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3555 g_string_append_printf (text, " %s\n", location);
3558 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3562 fprintf (stdout, "%s", text->str);
3564 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3565 OutputDebugStringA(text->str);
3568 g_string_free (text, TRUE);
3573 mono_threads_perform_thread_dump (void)
3575 ThreadDumpUserData ud;
3576 MonoInternalThread *thread_array [128];
3577 int tindex, nthreads;
3579 if (!thread_dump_requested)
3582 printf ("Full thread dump:\n");
3584 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3585 nthreads = collect_threads (thread_array, 128);
3587 memset (&ud, 0, sizeof (ud));
3588 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3589 ud.max_frames = 256;
3591 for (tindex = 0; tindex < nthreads; ++tindex)
3592 dump_thread (thread_array [tindex], &ud);
3596 thread_dump_requested = FALSE;
3599 /* Obtain the thread dump of all threads */
3601 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3604 ThreadDumpUserData ud;
3605 MonoInternalThread *thread_array [128];
3606 MonoDomain *domain = mono_domain_get ();
3607 MonoDebugSourceLocation *location;
3608 int tindex, nthreads;
3612 *out_threads = NULL;
3613 *out_stack_frames = NULL;
3615 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3616 nthreads = collect_threads (thread_array, 128);
3618 memset (&ud, 0, sizeof (ud));
3619 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3620 ud.max_frames = 256;
3622 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3625 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3629 for (tindex = 0; tindex < nthreads; ++tindex) {
3630 MonoInternalThread *thread = thread_array [tindex];
3631 MonoArray *thread_frames;
3637 /* Collect frames for the thread */
3638 if (thread == mono_thread_internal_current ()) {
3639 get_thread_dump (mono_thread_info_current (), &ud);
3641 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3644 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3646 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3649 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3651 for (i = 0; i < ud.nframes; ++i) {
3652 MonoStackFrameInfo *frame = &ud.frames [i];
3653 MonoMethod *method = NULL;
3654 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3658 sf->native_offset = frame->native_offset;
3660 if (frame->type == FRAME_TYPE_MANAGED)
3661 method = mono_jit_info_get_method (frame->ji);
3664 sf->method_address = (gsize) frame->ji->code_start;
3666 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3669 MONO_OBJECT_SETREF (sf, method, rm);
3671 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3673 sf->il_offset = location->il_offset;
3675 if (location && location->source_file) {
3676 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3677 sf->line = location->row;
3678 sf->column = location->column;
3680 mono_debug_free_source_location (location);
3685 mono_array_setref (thread_frames, i, sf);
3691 return is_ok (error);
3695 * mono_threads_request_thread_dump:
3697 * Ask all threads except the current to print their stacktrace to stdout.
3700 mono_threads_request_thread_dump (void)
3702 /*The new thread dump code runs out of the finalizer thread. */
3703 thread_dump_requested = TRUE;
3704 mono_gc_finalize_notify ();
3709 gint allocated; /* +1 so that refs [allocated] == NULL */
3713 typedef struct ref_stack RefStack;
3716 ref_stack_new (gint initial_size)
3720 initial_size = MAX (initial_size, 16) + 1;
3721 rs = g_new0 (RefStack, 1);
3722 rs->refs = g_new0 (gpointer, initial_size);
3723 rs->allocated = initial_size;
3728 ref_stack_destroy (gpointer ptr)
3730 RefStack *rs = (RefStack *)ptr;
3739 ref_stack_push (RefStack *rs, gpointer ptr)
3741 g_assert (rs != NULL);
3743 if (rs->bottom >= rs->allocated) {
3744 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3745 rs->allocated <<= 1;
3746 rs->refs [rs->allocated] = NULL;
3748 rs->refs [rs->bottom++] = ptr;
3752 ref_stack_pop (RefStack *rs)
3754 if (rs == NULL || rs->bottom == 0)
3758 rs->refs [rs->bottom] = NULL;
3762 ref_stack_find (RefStack *rs, gpointer ptr)
3769 for (refs = rs->refs; refs && *refs; refs++) {
3777 * mono_thread_push_appdomain_ref:
3779 * Register that the current thread may have references to objects in domain
3780 * @domain on its stack. Each call to this function should be paired with a
3781 * call to pop_appdomain_ref.
3784 mono_thread_push_appdomain_ref (MonoDomain *domain)
3786 MonoInternalThread *thread = mono_thread_internal_current ();
3789 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3790 SPIN_LOCK (thread->lock_thread_id);
3791 if (thread->appdomain_refs == NULL)
3792 thread->appdomain_refs = ref_stack_new (16);
3793 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3794 SPIN_UNLOCK (thread->lock_thread_id);
3799 mono_thread_pop_appdomain_ref (void)
3801 MonoInternalThread *thread = mono_thread_internal_current ();
3804 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3805 SPIN_LOCK (thread->lock_thread_id);
3806 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3807 SPIN_UNLOCK (thread->lock_thread_id);
3812 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3815 SPIN_LOCK (thread->lock_thread_id);
3816 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3817 SPIN_UNLOCK (thread->lock_thread_id);
3822 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3824 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3827 typedef struct abort_appdomain_data {
3828 struct wait_data wait;
3830 } abort_appdomain_data;
3833 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3835 MonoInternalThread *thread = (MonoInternalThread*)value;
3836 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3837 MonoDomain *domain = data->domain;
3839 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3840 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3842 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3843 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3844 data->wait.threads [data->wait.num] = thread;
3847 /* Just ignore the rest, we can't do anything with
3855 * mono_threads_abort_appdomain_threads:
3857 * Abort threads which has references to the given appdomain.
3860 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3862 #ifdef __native_client__
3866 abort_appdomain_data user_data;
3868 int orig_timeout = timeout;
3871 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3873 start_time = mono_msec_ticks ();
3875 mono_threads_lock ();
3877 user_data.domain = domain;
3878 user_data.wait.num = 0;
3879 /* This shouldn't take any locks */
3880 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3881 mono_threads_unlock ();
3883 if (user_data.wait.num > 0) {
3884 /* Abort the threads outside the threads lock */
3885 for (i = 0; i < user_data.wait.num; ++i)
3886 mono_thread_internal_abort (user_data.wait.threads [i]);
3889 * We should wait for the threads either to abort, or to leave the
3890 * domain. We can't do the latter, so we wait with a timeout.
3892 wait_for_tids (&user_data.wait, 100, FALSE);
3895 /* Update remaining time */
3896 timeout -= mono_msec_ticks () - start_time;
3897 start_time = mono_msec_ticks ();
3899 if (orig_timeout != -1 && timeout < 0)
3902 while (user_data.wait.num > 0);
3904 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3910 * mono_thread_get_undeniable_exception:
3912 * Return an exception which needs to be raised when leaving a catch clause.
3913 * This is used for undeniable exception propagation.
3916 mono_thread_get_undeniable_exception (void)
3918 MonoInternalThread *thread = mono_thread_internal_current ();
3920 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3923 // We don't want to have our exception effect calls made by
3924 // the catching block
3926 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3930 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3931 * exception if the thread no longer references a dying appdomain.
3933 thread->abort_exc->trace_ips = NULL;
3934 thread->abort_exc->stack_trace = NULL;
3935 return thread->abort_exc;
3938 #if MONO_SMALL_CONFIG
3939 #define NUM_STATIC_DATA_IDX 4
3940 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3944 #define NUM_STATIC_DATA_IDX 8
3945 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3946 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3950 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3951 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3954 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3956 gpointer *static_data = (gpointer *)addr;
3958 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3959 void **ptr = (void **)static_data [i];
3964 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3965 void **p = ptr + idx;
3968 mark_func ((MonoObject**)p, gc_data);
3974 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3976 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3980 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3982 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3986 * mono_alloc_static_data
3988 * Allocate memory blocks for storing threads or context static data
3991 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3993 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3996 gpointer* static_data = *static_data_ptr;
3998 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3999 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4001 if (mono_gc_user_markers_supported ()) {
4002 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4003 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4005 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4006 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4009 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4010 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4011 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4012 *static_data_ptr = static_data;
4013 static_data [0] = static_data;
4016 for (i = 1; i <= idx; ++i) {
4017 if (static_data [i])
4020 if (mono_gc_user_markers_supported ())
4021 static_data [i] = g_malloc0 (static_data_size [i]);
4023 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4024 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4025 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4030 mono_free_static_data (gpointer* static_data)
4033 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4034 gpointer p = static_data [i];
4038 * At this point, the static data pointer array is still registered with the
4039 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4040 * data. Freeing the individual arrays without first nulling their slots
4041 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4042 * such an already freed array. See bug #13813.
4044 static_data [i] = NULL;
4045 mono_memory_write_barrier ();
4046 if (mono_gc_user_markers_supported ())
4049 mono_gc_free_fixed (p);
4051 mono_gc_free_fixed (static_data);
4055 * mono_init_static_data_info
4057 * Initializes static data counters
4059 static void mono_init_static_data_info (StaticDataInfo *static_data)
4061 static_data->idx = 0;
4062 static_data->offset = 0;
4063 static_data->freelist = NULL;
4067 * mono_alloc_static_data_slot
4069 * Generates an offset for static data. static_data contains the counters
4070 * used to generate it.
4073 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4075 if (!static_data->idx && !static_data->offset) {
4077 * we use the first chunk of the first allocation also as
4078 * an array for the rest of the data
4080 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4082 static_data->offset += align - 1;
4083 static_data->offset &= ~(align - 1);
4084 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4085 static_data->idx ++;
4086 g_assert (size <= static_data_size [static_data->idx]);
4087 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4088 static_data->offset = 0;
4090 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4091 static_data->offset += size;
4096 * LOCKING: requires that threads_mutex is held
4099 context_adjust_static_data (MonoAppContext *ctx)
4101 if (context_static_info.offset || context_static_info.idx > 0) {
4102 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4103 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4104 ctx->data->static_data = ctx->static_data;
4109 * LOCKING: requires that threads_mutex is held
4112 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4114 MonoInternalThread *thread = (MonoInternalThread *)value;
4115 guint32 offset = GPOINTER_TO_UINT (user);
4117 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4121 * LOCKING: requires that threads_mutex is held
4124 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4126 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4131 guint32 offset = GPOINTER_TO_UINT (user);
4132 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4133 ctx->data->static_data = ctx->static_data;
4136 static StaticDataFreeList*
4137 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4139 StaticDataFreeList* prev = NULL;
4140 StaticDataFreeList* tmp = static_data->freelist;
4142 if (tmp->size == size) {
4144 prev->next = tmp->next;
4146 static_data->freelist = tmp->next;
4155 #if SIZEOF_VOID_P == 4
4162 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4164 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4166 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4167 MonoBitSet *rb = sets [idx];
4168 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4169 offset /= sizeof (uintptr_t);
4170 /* offset is now the bitmap offset */
4171 for (int i = 0; i < numbits; ++i) {
4172 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4173 mono_bitset_set_fast (rb, offset + i);
4178 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4180 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4181 MonoBitSet *rb = sets [idx];
4182 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4183 offset /= sizeof (uintptr_t);
4184 /* offset is now the bitmap offset */
4185 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4186 mono_bitset_clear_fast (rb, offset + i);
4190 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4192 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4194 StaticDataInfo *info;
4197 if (static_type == SPECIAL_STATIC_THREAD) {
4198 info = &thread_static_info;
4199 sets = thread_reference_bitmaps;
4201 info = &context_static_info;
4202 sets = context_reference_bitmaps;
4205 mono_threads_lock ();
4207 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4211 offset = item->offset;
4214 offset = mono_alloc_static_data_slot (info, size, align);
4217 update_reference_bitmap (sets, offset, bitmap, numbits);
4219 if (static_type == SPECIAL_STATIC_THREAD) {
4220 /* This can be called during startup */
4221 if (threads != NULL)
4222 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4224 if (contexts != NULL)
4225 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4227 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4230 mono_threads_unlock ();
4236 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4238 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4240 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4241 return get_thread_static_data (thread, offset);
4243 return get_context_static_data (thread->current_appcontext, offset);
4248 mono_get_special_static_data (guint32 offset)
4250 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4259 * LOCKING: requires that threads_mutex is held
4262 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4264 MonoInternalThread *thread = (MonoInternalThread *)value;
4265 OffsetSize *data = (OffsetSize *)user;
4266 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4267 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4270 if (!thread->static_data || !thread->static_data [idx])
4272 ptr = ((char*) thread->static_data [idx]) + off;
4273 mono_gc_bzero_atomic (ptr, data->size);
4277 * LOCKING: requires that threads_mutex is held
4280 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4282 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4287 OffsetSize *data = (OffsetSize *)user;
4288 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4289 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4292 if (!ctx->static_data || !ctx->static_data [idx])
4295 ptr = ((char*) ctx->static_data [idx]) + off;
4296 mono_gc_bzero_atomic (ptr, data->size);
4300 do_free_special_slot (guint32 offset, guint32 size)
4302 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4304 StaticDataInfo *info;
4306 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4307 info = &thread_static_info;
4308 sets = thread_reference_bitmaps;
4310 info = &context_static_info;
4311 sets = context_reference_bitmaps;
4314 guint32 data_offset = offset;
4315 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4316 OffsetSize data = { data_offset, size };
4318 clear_reference_bitmap (sets, data.offset, data.size);
4320 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4321 if (threads != NULL)
4322 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4324 if (contexts != NULL)
4325 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4328 if (!mono_runtime_is_shutting_down ()) {
4329 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4331 item->offset = offset;
4334 item->next = info->freelist;
4335 info->freelist = item;
4340 do_free_special (gpointer key, gpointer value, gpointer data)
4342 MonoClassField *field = (MonoClassField *)key;
4343 guint32 offset = GPOINTER_TO_UINT (value);
4346 size = mono_type_size (field->type, &align);
4347 do_free_special_slot (offset, size);
4351 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4353 mono_threads_lock ();
4355 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4357 mono_threads_unlock ();
4361 static void CALLBACK dummy_apc (ULONG_PTR param)
4367 * mono_thread_execute_interruption
4369 * Performs the operation that the requested thread state requires (abort,
4372 static MonoException*
4373 mono_thread_execute_interruption (void)
4375 MonoInternalThread *thread = mono_thread_internal_current ();
4376 MonoThread *sys_thread = mono_thread_current ();
4378 LOCK_THREAD (thread);
4380 /* MonoThread::interruption_requested can only be changed with atomics */
4381 if (mono_thread_clear_interruption_requested (thread)) {
4382 /* this will consume pending APC calls */
4384 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4386 InterlockedDecrement (&thread_interruption_requested);
4388 /* Clear the interrupted flag of the thread so it can wait again */
4389 mono_thread_info_clear_self_interrupt ();
4392 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4393 if (sys_thread->pending_exception) {
4396 exc = sys_thread->pending_exception;
4397 sys_thread->pending_exception = NULL;
4399 UNLOCK_THREAD (thread);
4401 } else if (thread->state & (ThreadState_AbortRequested)) {
4402 UNLOCK_THREAD (thread);
4403 g_assert (sys_thread->pending_exception == NULL);
4404 if (thread->abort_exc == NULL) {
4406 * This might be racy, but it has to be called outside the lock
4407 * since it calls managed code.
4409 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4411 return thread->abort_exc;
4412 } else if (thread->state & (ThreadState_SuspendRequested)) {
4413 /* calls UNLOCK_THREAD (thread) */
4414 self_suspend_internal ();
4416 } else if (thread->thread_interrupt_requested) {
4418 thread->thread_interrupt_requested = FALSE;
4419 UNLOCK_THREAD (thread);
4421 return(mono_get_exception_thread_interrupted ());
4424 UNLOCK_THREAD (thread);
4430 * mono_thread_request_interruption
4432 * A signal handler can call this method to request the interruption of a
4433 * thread. The result of the interruption will depend on the current state of
4434 * the thread. If the result is an exception that needs to be throw, it is
4435 * provided as return value.
4438 mono_thread_request_interruption (gboolean running_managed)
4440 MonoInternalThread *thread = mono_thread_internal_current ();
4442 /* The thread may already be stopping */
4446 if (!mono_thread_set_interruption_requested (thread))
4448 InterlockedIncrement (&thread_interruption_requested);
4450 if (!running_managed || is_running_protected_wrapper ()) {
4451 /* Can't stop while in unmanaged code. Increase the global interruption
4452 request count. When exiting the unmanaged method the count will be
4453 checked and the thread will be interrupted. */
4455 /* this will awake the thread if it is in WaitForSingleObject
4457 /* Our implementation of this function ignores the func argument */
4459 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4461 mono_thread_info_self_interrupt ();
4466 return mono_thread_execute_interruption ();
4470 /*This function should be called by a thread after it has exited all of
4471 * its handle blocks at interruption time.*/
4473 mono_thread_resume_interruption (void)
4475 MonoInternalThread *thread = mono_thread_internal_current ();
4476 gboolean still_aborting;
4478 /* The thread may already be stopping */
4482 LOCK_THREAD (thread);
4483 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4484 UNLOCK_THREAD (thread);
4486 /*This can happen if the protected block called Thread::ResetAbort*/
4487 if (!still_aborting)
4490 if (!mono_thread_set_interruption_requested (thread))
4492 InterlockedIncrement (&thread_interruption_requested);
4494 mono_thread_info_self_interrupt ();
4496 return mono_thread_execute_interruption ();
4499 gboolean mono_thread_interruption_requested ()
4501 if (thread_interruption_requested) {
4502 MonoInternalThread *thread = mono_thread_internal_current ();
4503 /* The thread may already be stopping */
4505 return mono_thread_get_interruption_requested (thread);
4510 static MonoException*
4511 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4513 MonoInternalThread *thread = mono_thread_internal_current ();
4515 /* The thread may already be stopping */
4518 if (!mono_thread_get_interruption_requested (thread))
4520 if (!bypass_abort_protection && is_running_protected_wrapper ())
4523 return mono_thread_execute_interruption ();
4527 * Performs the interruption of the current thread, if one has been requested,
4528 * and the thread is not running a protected wrapper.
4529 * Return the exception which needs to be thrown, if any.
4532 mono_thread_interruption_checkpoint (void)
4534 return mono_thread_interruption_checkpoint_request (FALSE);
4538 * Performs the interruption of the current thread, if one has been requested.
4539 * Return the exception which needs to be thrown, if any.
4542 mono_thread_force_interruption_checkpoint_noraise (void)
4544 return mono_thread_interruption_checkpoint_request (TRUE);
4548 * mono_set_pending_exception:
4550 * Set the pending exception of the current thread to EXC.
4551 * The exception will be thrown when execution returns to managed code.
4554 mono_set_pending_exception (MonoException *exc)
4556 MonoThread *thread = mono_thread_current ();
4558 /* The thread may already be stopping */
4562 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4564 mono_thread_request_interruption (FALSE);
4568 * mono_thread_interruption_request_flag:
4570 * Returns the address of a flag that will be non-zero if an interruption has
4571 * been requested for a thread. The thread to interrupt may not be the current
4572 * thread, so an additional call to mono_thread_interruption_requested() or
4573 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4576 gint32* mono_thread_interruption_request_flag ()
4578 return &thread_interruption_requested;
4582 mono_thread_init_apartment_state (void)
4585 MonoInternalThread* thread = mono_thread_internal_current ();
4587 /* Positive return value indicates success, either
4588 * S_OK if this is first CoInitialize call, or
4589 * S_FALSE if CoInitialize already called, but with same
4590 * threading model. A negative value indicates failure,
4591 * probably due to trying to change the threading model.
4593 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4594 ? COINIT_APARTMENTTHREADED
4595 : COINIT_MULTITHREADED) < 0) {
4596 thread->apartment_state = ThreadApartmentState_Unknown;
4602 mono_thread_cleanup_apartment_state (void)
4605 MonoInternalThread* thread = mono_thread_internal_current ();
4607 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4614 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4616 LOCK_THREAD (thread);
4617 thread->state |= state;
4618 UNLOCK_THREAD (thread);
4622 * mono_thread_test_and_set_state:
4624 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4626 * Returns TRUE is @set was OR'd in.
4629 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4631 LOCK_THREAD (thread);
4633 if ((thread->state & test) != 0) {
4634 UNLOCK_THREAD (thread);
4638 thread->state |= set;
4639 UNLOCK_THREAD (thread);
4645 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4647 LOCK_THREAD (thread);
4648 thread->state &= ~state;
4649 UNLOCK_THREAD (thread);
4653 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4655 gboolean ret = FALSE;
4657 LOCK_THREAD (thread);
4659 if ((thread->state & test) != 0) {
4663 UNLOCK_THREAD (thread);
4669 self_interrupt_thread (void *_unused)
4672 MonoThreadInfo *info;
4674 exc = mono_thread_execute_interruption ();
4676 if (mono_threads_is_coop_enabled ()) {
4677 /* We can return from an async call in coop, as
4678 * it's simply called when exiting the safepoint */
4682 g_error ("%s: we can't resume from an async call", __func__);
4685 info = mono_thread_info_current ();
4687 /* We must use _with_context since we didn't trampoline into the runtime */
4688 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. */
4692 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4696 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4700 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4702 MonoJitInfo **dest = (MonoJitInfo **)data;
4708 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4710 MonoJitInfo *ji = NULL;
4715 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4716 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4717 * where we hold runtime locks.
4719 if (!mono_threads_is_coop_enabled ())
4720 mono_thread_info_set_is_async_context (TRUE);
4721 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4722 if (!mono_threads_is_coop_enabled ())
4723 mono_thread_info_set_is_async_context (FALSE);
4728 MonoInternalThread *thread;
4729 gboolean install_async_abort;
4730 MonoThreadInfoInterruptToken *interrupt_token;
4733 static SuspendThreadResult
4734 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4736 AbortThreadData *data = (AbortThreadData *)ud;
4737 MonoInternalThread *thread = data->thread;
4738 MonoJitInfo *ji = NULL;
4739 gboolean protected_wrapper;
4740 gboolean running_managed;
4742 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4743 return MonoResumeThread;
4745 /*someone is already interrupting it*/
4746 if (!mono_thread_set_interruption_requested (thread))
4747 return MonoResumeThread;
4749 InterlockedIncrement (&thread_interruption_requested);
4751 ji = mono_thread_info_get_last_managed (info);
4752 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4753 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4755 if (!protected_wrapper && running_managed) {
4756 /*We are in managed code*/
4757 /*Set the thread to call */
4758 if (data->install_async_abort)
4759 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4760 return MonoResumeThread;
4763 * This will cause waits to be broken.
4764 * It will also prevent the thread from entering a wait, so if the thread returns
4765 * from the wait before it receives the abort signal, it will just spin in the wait
4766 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4769 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4771 return MonoResumeThread;
4776 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4778 AbortThreadData data;
4780 g_assert (thread != mono_thread_internal_current ());
4782 data.thread = thread;
4783 data.install_async_abort = install_async_abort;
4784 data.interrupt_token = NULL;
4786 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4787 if (data.interrupt_token)
4788 mono_thread_info_finish_interrupt (data.interrupt_token);
4789 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4793 self_abort_internal (MonoError *error)
4799 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4800 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4803 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.
4805 exc = mono_thread_request_interruption (TRUE);
4807 mono_error_set_exception_instance (error, exc);
4809 mono_thread_info_self_interrupt ();
4813 MonoInternalThread *thread;
4815 MonoThreadInfoInterruptToken *interrupt_token;
4816 } SuspendThreadData;
4818 static SuspendThreadResult
4819 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4821 SuspendThreadData *data = (SuspendThreadData *)ud;
4822 MonoInternalThread *thread = data->thread;
4823 MonoJitInfo *ji = NULL;
4824 gboolean protected_wrapper;
4825 gboolean running_managed;
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 (running_managed && !protected_wrapper) {
4832 if (mono_threads_is_coop_enabled ()) {
4833 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4834 return MonoResumeThread;
4836 thread->state &= ~ThreadState_SuspendRequested;
4837 thread->state |= ThreadState_Suspended;
4838 return KeepSuspended;
4841 if (mono_thread_set_interruption_requested (thread))
4842 InterlockedIncrement (&thread_interruption_requested);
4843 if (data->interrupt)
4844 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4846 return MonoResumeThread;
4850 /* LOCKING: called with @thread synch_cs held, and releases it */
4852 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4854 SuspendThreadData data;
4856 g_assert (thread != mono_thread_internal_current ());
4858 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4860 thread->self_suspended = FALSE;
4862 data.thread = thread;
4863 data.interrupt = interrupt;
4864 data.interrupt_token = NULL;
4866 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4867 if (data.interrupt_token)
4868 mono_thread_info_finish_interrupt (data.interrupt_token);
4870 UNLOCK_THREAD (thread);
4873 /* LOCKING: called with @thread synch_cs held, and releases it */
4875 self_suspend_internal (void)
4877 MonoInternalThread *thread;
4879 MonoOSEventWaitRet res;
4881 thread = mono_thread_internal_current ();
4883 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4885 thread->self_suspended = TRUE;
4887 thread->state &= ~ThreadState_SuspendRequested;
4888 thread->state |= ThreadState_Suspended;
4890 UNLOCK_THREAD (thread);
4892 event = thread->suspended;
4895 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4896 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4901 suspend_for_shutdown_async_call (gpointer unused)
4904 mono_thread_info_yield ();
4907 static SuspendThreadResult
4908 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4910 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4911 return MonoResumeThread;
4915 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4917 g_assert (thread != mono_thread_internal_current ());
4919 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4923 * mono_thread_is_foreign:
4924 * @thread: the thread to query
4926 * This function allows one to determine if a thread was created by the mono runtime and has
4927 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4929 * Returns: TRUE if @thread was not created by the runtime.
4932 mono_thread_is_foreign (MonoThread *thread)
4934 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4935 return info->runtime_thread == FALSE;
4939 * mono_add_joinable_thread:
4941 * Add TID to the list of joinable threads.
4942 * LOCKING: Acquires the threads lock.
4945 mono_threads_add_joinable_thread (gpointer tid)
4949 * We cannot detach from threads because it causes problems like
4950 * 2fd16f60/r114307. So we collect them and join them when
4951 * we have time (in he finalizer thread).
4953 joinable_threads_lock ();
4954 if (!joinable_threads)
4955 joinable_threads = g_hash_table_new (NULL, NULL);
4956 g_hash_table_insert (joinable_threads, tid, tid);
4957 joinable_thread_count ++;
4958 joinable_threads_unlock ();
4960 mono_gc_finalize_notify ();
4965 * mono_threads_join_threads:
4967 * Join all joinable threads. This is called from the finalizer thread.
4968 * LOCKING: Acquires the threads lock.
4971 mono_threads_join_threads (void)
4974 GHashTableIter iter;
4981 if (!joinable_thread_count)
4985 joinable_threads_lock ();
4987 if (g_hash_table_size (joinable_threads)) {
4988 g_hash_table_iter_init (&iter, joinable_threads);
4989 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4990 thread = (pthread_t)tid;
4991 g_hash_table_remove (joinable_threads, key);
4992 joinable_thread_count --;
4995 joinable_threads_unlock ();
4997 if (thread != pthread_self ()) {
4999 /* This shouldn't block */
5000 mono_threads_join_lock ();
5001 mono_native_thread_join (thread);
5002 mono_threads_join_unlock ();
5015 * Wait for thread TID to exit.
5016 * LOCKING: Acquires the threads lock.
5019 mono_thread_join (gpointer tid)
5023 gboolean found = FALSE;
5025 joinable_threads_lock ();
5026 if (!joinable_threads)
5027 joinable_threads = g_hash_table_new (NULL, NULL);
5028 if (g_hash_table_lookup (joinable_threads, tid)) {
5029 g_hash_table_remove (joinable_threads, tid);
5030 joinable_thread_count --;
5033 joinable_threads_unlock ();
5036 thread = (pthread_t)tid;
5038 mono_native_thread_join (thread);
5044 mono_thread_internal_unhandled_exception (MonoObject* exc)
5046 MonoClass *klass = exc->vtable->klass;
5047 if (is_threadabort_exception (klass)) {
5048 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5049 } else if (!is_appdomainunloaded_exception (klass)
5050 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5051 mono_unhandled_exception (exc);
5052 if (mono_environment_exitcode_get () == 1) {
5053 mono_environment_exitcode_set (255);
5054 mono_invoke_unhandled_exception_hook (exc);
5055 g_assert_not_reached ();
5061 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5064 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5065 mono_error_set_pending_exception (&error);
5069 * mono_threads_attach_coop: called by native->managed wrappers
5073 * - @return: the original domain which needs to be restored, or NULL.
5076 * - @dummy: contains the original domain
5077 * - @return: a cookie containing current MonoThreadInfo*.
5080 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5083 gboolean fresh_thread = FALSE;
5086 /* Happens when called from AOTed code which is only used in the root domain. */
5087 domain = mono_get_root_domain ();
5092 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5093 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5094 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5095 * we're only responsible for making the cookie. */
5096 if (mono_threads_is_coop_enabled ()) {
5097 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5098 fresh_thread = !info || !mono_thread_info_is_live (info);
5101 if (!mono_thread_internal_current ()) {
5102 mono_thread_attach_full (domain, FALSE);
5105 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5108 orig = mono_domain_get ();
5110 mono_domain_set (domain, TRUE);
5112 if (!mono_threads_is_coop_enabled ())
5113 return orig != domain ? orig : NULL;
5117 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5118 * return the right cookie. */
5119 return mono_threads_enter_gc_unsafe_region_cookie ();
5122 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5123 return mono_threads_enter_gc_unsafe_region (dummy);
5128 * mono_threads_detach_coop: called by native->managed wrappers
5131 * - @cookie: the original domain which needs to be restored, or NULL.
5135 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5136 * - @dummy: contains the original domain
5139 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5141 MonoDomain *domain, *orig;
5143 if (!mono_threads_is_coop_enabled ()) {
5144 orig = (MonoDomain*) cookie;
5146 mono_domain_set (orig, TRUE);
5148 orig = (MonoDomain*) *dummy;
5150 domain = mono_domain_get ();
5153 /* it won't do anything if cookie is NULL
5154 * thread state RUNNING -> (RUNNING|BLOCKING) */
5155 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5157 if (orig != domain) {
5159 mono_domain_unset ();
5161 mono_domain_set (orig, TRUE);
5167 mono_thread_try_resume_interruption (void)
5169 MonoInternalThread *thread;
5171 thread = mono_thread_internal_current ();
5172 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
5174 if (mono_thread_get_abort_prot_block_count (thread) > 0 || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5177 return mono_thread_resume_interruption ();
5181 /* Returns TRUE if the current thread is ready to be interrupted. */
5183 mono_threads_is_ready_to_be_interrupted (void)
5185 MonoInternalThread *thread;
5187 thread = mono_thread_internal_current ();
5188 LOCK_THREAD (thread);
5189 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5190 UNLOCK_THREAD (thread);
5194 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5195 UNLOCK_THREAD (thread);
5199 UNLOCK_THREAD (thread);
5205 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5207 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5209 if (internal->thread_info) {
5210 g_string_append (text, ", state : ");
5211 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5214 if (internal->owned_mutexes) {
5217 g_string_append (text, ", owns : [");
5218 for (i = 0; i < internal->owned_mutexes->len; i++)
5219 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5220 g_string_append (text, "]");
5225 mono_thread_internal_is_current (MonoInternalThread *internal)
5227 g_assert (internal);
5228 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));