return klass == mono_defaults.threadabortexception_class;
}
-/*
- * NOTE: this function can be called also for threads different from the current one:
- * make sure no code called from it will ever assume it is run on the thread that is
- * getting cleaned up.
- */
-static void thread_cleanup (MonoInternalThread *thread)
-{
- gboolean ret;
-
- g_assert (thread != NULL);
-
- if (thread->abort_state_handle) {
- mono_gchandle_free (thread->abort_state_handle);
- thread->abort_state_handle = 0;
- }
- thread->abort_exc = NULL;
- thread->current_appcontext = NULL;
-
- /*
- * This is necessary because otherwise we might have
- * cross-domain references which will not get cleaned up when
- * the target domain is unloaded.
- */
- if (thread->cached_culture_info) {
- int i;
- for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
- mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
- }
-
- /*
- * thread->synch_cs can be NULL if this was called after
- * ves_icall_System_Threading_InternalThread_Thread_free_internal.
- * This can happen only during shutdown.
- * The shutting_down flag is not always set, so we can't assert on it.
- */
- if (thread->synch_cs)
- LOCK_THREAD (thread);
-
- thread->state |= ThreadState_Stopped;
- thread->state &= ~ThreadState_Background;
-
- if (thread->synch_cs)
- UNLOCK_THREAD (thread);
-
- /*
- An interruption request has leaked to cleanup. Adjust the global counter.
-
- This can happen is the abort source thread finds the abortee (this) thread
- in unmanaged code. If this thread never trips back to managed code or check
- the local flag it will be left set and positively unbalance the global counter.
-
- Leaving the counter unbalanced will cause a performance degradation since all threads
- will now keep checking their local flags all the time.
- */
- if (InterlockedExchange (&thread->interruption_requested, 0))
- InterlockedDecrement (&thread_interruption_requested);
-
- mono_threads_lock ();
-
- if (!threads) {
- ret = FALSE;
- } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
- /* We have to check whether the thread object for the
- * tid is still the same in the table because the
- * thread might have been destroyed and the tid reused
- * in the meantime, in which case the tid would be in
- * the table, but with another thread object.
- */
- ret = FALSE;
- } else {
- mono_g_hash_table_remove (threads, (gpointer)thread->tid);
- ret = TRUE;
- }
-
- mono_threads_unlock ();
-
- /* Don't close the handle here, wait for the object finalizer
- * to do it. Otherwise, the following race condition applies:
- *
- * 1) Thread exits (and thread_cleanup() closes the handle)
- *
- * 2) Some other handle is reassigned the same slot
- *
- * 3) Another thread tries to join the first thread, and
- * blocks waiting for the reassigned handle to be signalled
- * (which might never happen). This is possible, because the
- * thread calling Join() still has a reference to the first
- * thread's object.
- */
-
- /* if the thread is not in the hash it has been removed already */
- if (!ret) {
- if (thread == mono_thread_internal_current ()) {
- mono_domain_unset ();
- mono_memory_barrier ();
- }
- if (mono_thread_cleanup_fn)
- mono_thread_cleanup_fn (thread_get_tid (thread));
- return;
- }
- mono_release_type_locks (thread);
-
- /* Can happen when we attach the profiler helper thread in order to heapshot. */
- if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
- mono_profiler_thread_end (thread->tid);
-
- mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
-
- if (thread == mono_thread_internal_current ()) {
- /*
- * This will signal async signal handlers that the thread has exited.
- * The profiler callback needs this to be set, so it cannot be done earlier.
- */
- mono_domain_unset ();
- mono_memory_barrier ();
- }
-
- if (thread == mono_thread_internal_current ())
- mono_thread_pop_appdomain_ref ();
-
- thread->cached_culture_info = NULL;
-
- mono_free_static_data (thread->static_data);
- thread->static_data = NULL;
- ref_stack_destroy (thread->appdomain_refs);
- thread->appdomain_refs = NULL;
-
- if (mono_thread_cleanup_fn)
- mono_thread_cleanup_fn (thread_get_tid (thread));
-
- if (mono_gc_is_moving ()) {
- MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
- thread->thread_pinning_ref = NULL;
- }
-
- g_assert (thread->suspended);
- mono_os_event_destroy (thread->suspended);
- g_free (thread->suspended);
- thread->suspended = NULL;
-}
-
/*
* A special static data offset (guint32) consists of 3 parts:
*
/* If the thread calls ExitThread at all, this remaining code
* will not be executed, but the main thread will eventually
- * call thread_cleanup() on this thread's behalf.
+ * call mono_thread_detach_internal() on this thread's behalf.
*/
THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
/* Do any cleanup needed for apartment state. This
- * cannot be done in thread_cleanup since thread_cleanup could be
- * called for a thread other than the current thread.
+ * cannot be done in mono_thread_detach_internal since
+ * mono_thread_detach_internal could be called for a
+ * thread other than the current thread.
* mono_thread_cleanup_apartment_state cleans up apartment
* for the current thead */
mono_thread_cleanup_apartment_state ();
void
mono_thread_detach_internal (MonoInternalThread *thread)
{
- g_return_if_fail (thread != NULL);
+ gboolean removed;
+
+ g_assert (thread != NULL);
THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
mono_w32mutex_abandon ();
#endif
- thread_cleanup (thread);
+ if (thread->abort_state_handle) {
+ mono_gchandle_free (thread->abort_state_handle);
+ thread->abort_state_handle = 0;
+ }
+
+ thread->abort_exc = NULL;
+ thread->current_appcontext = NULL;
+
+ /*
+ * This is necessary because otherwise we might have
+ * cross-domain references which will not get cleaned up when
+ * the target domain is unloaded.
+ */
+ if (thread->cached_culture_info) {
+ int i;
+ for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
+ mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
+ }
+
+ /*
+ * thread->synch_cs can be NULL if this was called after
+ * ves_icall_System_Threading_InternalThread_Thread_free_internal.
+ * This can happen only during shutdown.
+ * The shutting_down flag is not always set, so we can't assert on it.
+ */
+ if (thread->synch_cs)
+ LOCK_THREAD (thread);
+
+ thread->state |= ThreadState_Stopped;
+ thread->state &= ~ThreadState_Background;
+
+ if (thread->synch_cs)
+ UNLOCK_THREAD (thread);
+
+ /*
+ An interruption request has leaked to cleanup. Adjust the global counter.
+
+ This can happen is the abort source thread finds the abortee (this) thread
+ in unmanaged code. If this thread never trips back to managed code or check
+ the local flag it will be left set and positively unbalance the global counter.
+
+ Leaving the counter unbalanced will cause a performance degradation since all threads
+ will now keep checking their local flags all the time.
+ */
+ if (InterlockedExchange (&thread->interruption_requested, 0) != 0)
+ InterlockedDecrement (&thread_interruption_requested);
+
+ mono_threads_lock ();
+
+ if (!threads) {
+ removed = FALSE;
+ } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
+ /* We have to check whether the thread object for the
+ * tid is still the same in the table because the
+ * thread might have been destroyed and the tid reused
+ * in the meantime, in which case the tid would be in
+ * the table, but with another thread object.
+ */
+ removed = FALSE;
+ } else {
+ mono_g_hash_table_remove (threads, (gpointer)thread->tid);
+ removed = TRUE;
+ }
+
+ mono_threads_unlock ();
+
+ /* Don't close the handle here, wait for the object finalizer
+ * to do it. Otherwise, the following race condition applies:
+ *
+ * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
+ *
+ * 2) Some other handle is reassigned the same slot
+ *
+ * 3) Another thread tries to join the first thread, and
+ * blocks waiting for the reassigned handle to be signalled
+ * (which might never happen). This is possible, because the
+ * thread calling Join() still has a reference to the first
+ * thread's object.
+ */
+
+ /* if the thread is not in the hash it has been removed already */
+ if (!removed) {
+ mono_domain_unset ();
+ mono_memory_barrier ();
+
+ if (mono_thread_cleanup_fn)
+ mono_thread_cleanup_fn (thread_get_tid (thread));
+
+ goto done;
+ }
+
+ mono_release_type_locks (thread);
+
+ /* Can happen when we attach the profiler helper thread in order to heapshot. */
+ if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
+ mono_profiler_thread_end (thread->tid);
+ mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
+
+ /*
+ * This will signal async signal handlers that the thread has exited.
+ * The profiler callback needs this to be set, so it cannot be done earlier.
+ */
+ mono_domain_unset ();
+ mono_memory_barrier ();
+
+ if (thread == mono_thread_internal_current ())
+ mono_thread_pop_appdomain_ref ();
+
+ thread->cached_culture_info = NULL;
+
+ mono_free_static_data (thread->static_data);
+ thread->static_data = NULL;
+ ref_stack_destroy (thread->appdomain_refs);
+ thread->appdomain_refs = NULL;
+
+ if (mono_thread_cleanup_fn)
+ mono_thread_cleanup_fn (thread_get_tid (thread));
+
+ if (mono_gc_is_moving ()) {
+ MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
+ thread->thread_pinning_ref = NULL;
+ }
+
+ g_assert (thread->suspended);
+ mono_os_event_destroy (thread->suspended);
+ g_free (thread->suspended);
+ thread->suspended = NULL;
+
+done:
SET_CURRENT_OBJECT (NULL);
mono_domain_unset ();
THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
/*
- * Since threads keep a reference to their thread object while running, by the time this function is called,
- * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
- * when thread_cleanup () can be called after this.
+ * Since threads keep a reference to their thread object while running, by
+ * the time this function is called, the thread has already exited/detached,
+ * i.e. mono_thread_detach_internal () has ran. The exception is during
+ * shutdown, when mono_thread_detach_internal () can be called after this.
*/
if (this_obj->handle) {
mono_threads_close_thread_handle (this_obj->handle);
projects / mono.git / commitdiff