// Starts the Attach Listener thread void AttachListener::init() { EXCEPTION_MARK; klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); instanceKlassHandle klass (THREAD, k); instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); const char thread_name[] = "Attach Listener"; Handle string = java_lang_String::create_from_str(thread_name, CHECK); // Initialize thread_oop to put it into the system threadGroup Handle thread_group (THREAD, Universe::system_thread_group()); JavaValue result(T_VOID); JavaCalls::call_special(&result, thread_oop, klass, vmSymbols::object_initializer_name(), vmSymbols::threadgroup_string_void_signature(), thread_group, string, CHECK); KlassHandle group(THREAD, SystemDictionary::ThreadGroup_klass()); JavaCalls::call_special(&result, thread_group, group, vmSymbols::add_method_name(), vmSymbols::thread_void_signature(), thread_oop, // ARG 1 CHECK); { MutexLocker mu(Threads_lock); JavaThread* listener_thread = new JavaThread(&attach_listener_thread_entry); // Check that thread and osthread were created if (listener_thread == NULL || listener_thread->osthread() == NULL) { vm_exit_during_initialization("java.lang.OutOfMemoryError", "unable to create new native thread"); } java_lang_Thread::set_thread(thread_oop(), listener_thread); java_lang_Thread::set_daemon(thread_oop()); listener_thread->set_threadObj(thread_oop()); Threads::add(listener_thread); Thread::start(listener_thread); } }
SurrogateLockerThread* SurrogateLockerThread::make(TRAPS) { klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_Thread(), true, CHECK_NULL); instanceKlassHandle klass (THREAD, k); instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL); const char thread_name[] = "Surrogate Locker Thread (CMS)"; Handle string = java_lang_String::create_from_str(thread_name, CHECK_NULL); // Initialize thread_oop to put it into the system threadGroup Handle thread_group (THREAD, Universe::system_thread_group()); JavaValue result(T_VOID); JavaCalls::call_special(&result, thread_oop, klass, vmSymbolHandles::object_initializer_name(), vmSymbolHandles::threadgroup_string_void_signature(), thread_group, string, CHECK_NULL); SurrogateLockerThread* res; { MutexLocker mu(Threads_lock); res = new SurrogateLockerThread(); // At this point it may be possible that no osthread was created for the // JavaThread due to lack of memory. We would have to throw an exception // in that case. However, since this must work and we do not allow // exceptions anyway, check and abort if this fails. if (res == NULL || res->osthread() == NULL) { vm_exit_during_initialization("java.lang.OutOfMemoryError", "unable to create new native thread"); } java_lang_Thread::set_thread(thread_oop(), res); java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); java_lang_Thread::set_daemon(thread_oop()); res->set_threadObj(thread_oop()); Threads::add(res); Thread::start(res); } os::yield(); // This seems to help with initial start-up of SLT return res; }
void ServiceThread::initialize() { EXCEPTION_MARK; instanceKlassHandle klass (THREAD, SystemDictionary::Thread_klass()); instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); const char* name = JDK_Version::is_gte_jdk17x_version() ? "Service Thread" : "Low Memory Detector"; Handle string = java_lang_String::create_from_str(name, CHECK); // Initialize thread_oop to put it into the system threadGroup Handle thread_group (THREAD, Universe::system_thread_group()); JavaValue result(T_VOID); JavaCalls::call_special(&result, thread_oop, klass, vmSymbols::object_initializer_name(), vmSymbols::threadgroup_string_void_signature(), thread_group, string, CHECK); { MutexLocker mu(Threads_lock); ServiceThread* thread = new ServiceThread(&service_thread_entry); // At this point it may be possible that no osthread was created for the // JavaThread due to lack of memory. We would have to throw an exception // in that case. However, since this must work and we do not allow // exceptions anyway, check and abort if this fails. if (thread == NULL || thread->osthread() == NULL) { vm_exit_during_initialization("java.lang.OutOfMemoryError", "unable to create new native thread"); } java_lang_Thread::set_thread(thread_oop(), thread); java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); java_lang_Thread::set_daemon(thread_oop()); thread->set_threadObj(thread_oop()); _instance = thread; Threads::add(thread); Thread::start(thread); } }