Tue, 11 Nov 2014 11:05:41 +0100
8056071: compiler/whitebox/IsMethodCompilableTest.java fails with 'method() is not compilable after 3 iterations'
Summary: Always use MDO if valid and always compile trivial methods with C1 if available.
Reviewed-by: kvn, iveresov
1 /*
2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "runtime/interfaceSupport.hpp"
27 #include "runtime/javaCalls.hpp"
28 #include "runtime/serviceThread.hpp"
29 #include "runtime/mutexLocker.hpp"
30 #include "prims/jvmtiImpl.hpp"
31 #include "services/allocationContextService.hpp"
32 #include "services/gcNotifier.hpp"
33 #include "services/diagnosticArgument.hpp"
34 #include "services/diagnosticFramework.hpp"
36 ServiceThread* ServiceThread::_instance = NULL;
38 void ServiceThread::initialize() {
39 EXCEPTION_MARK;
41 instanceKlassHandle klass (THREAD, SystemDictionary::Thread_klass());
42 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK);
44 const char* name = JDK_Version::is_gte_jdk17x_version() ?
45 "Service Thread" : "Low Memory Detector";
47 Handle string = java_lang_String::create_from_str(name, CHECK);
49 // Initialize thread_oop to put it into the system threadGroup
50 Handle thread_group (THREAD, Universe::system_thread_group());
51 JavaValue result(T_VOID);
52 JavaCalls::call_special(&result, thread_oop,
53 klass,
54 vmSymbols::object_initializer_name(),
55 vmSymbols::threadgroup_string_void_signature(),
56 thread_group,
57 string,
58 CHECK);
60 {
61 MutexLocker mu(Threads_lock);
62 ServiceThread* thread = new ServiceThread(&service_thread_entry);
64 // At this point it may be possible that no osthread was created for the
65 // JavaThread due to lack of memory. We would have to throw an exception
66 // in that case. However, since this must work and we do not allow
67 // exceptions anyway, check and abort if this fails.
68 if (thread == NULL || thread->osthread() == NULL) {
69 vm_exit_during_initialization("java.lang.OutOfMemoryError",
70 "unable to create new native thread");
71 }
73 java_lang_Thread::set_thread(thread_oop(), thread);
74 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
75 java_lang_Thread::set_daemon(thread_oop());
76 thread->set_threadObj(thread_oop());
77 _instance = thread;
79 Threads::add(thread);
80 Thread::start(thread);
81 }
82 }
84 void ServiceThread::service_thread_entry(JavaThread* jt, TRAPS) {
85 while (true) {
86 bool sensors_changed = false;
87 bool has_jvmti_events = false;
88 bool has_gc_notification_event = false;
89 bool has_dcmd_notification_event = false;
90 bool acs_notify = false;
91 JvmtiDeferredEvent jvmti_event;
92 {
93 // Need state transition ThreadBlockInVM so that this thread
94 // will be handled by safepoint correctly when this thread is
95 // notified at a safepoint.
97 // This ThreadBlockInVM object is not also considered to be
98 // suspend-equivalent because ServiceThread is not visible to
99 // external suspension.
101 ThreadBlockInVM tbivm(jt);
103 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
104 while (!(sensors_changed = LowMemoryDetector::has_pending_requests()) &&
105 !(has_jvmti_events = JvmtiDeferredEventQueue::has_events()) &&
106 !(has_gc_notification_event = GCNotifier::has_event()) &&
107 !(has_dcmd_notification_event = DCmdFactory::has_pending_jmx_notification()) &&
108 !(acs_notify = AllocationContextService::should_notify())) {
109 // wait until one of the sensors has pending requests, or there is a
110 // pending JVMTI event or JMX GC notification to post
111 Service_lock->wait(Mutex::_no_safepoint_check_flag);
112 }
114 if (has_jvmti_events) {
115 jvmti_event = JvmtiDeferredEventQueue::dequeue();
116 }
117 }
119 if (has_jvmti_events) {
120 jvmti_event.post();
121 }
123 if (sensors_changed) {
124 LowMemoryDetector::process_sensor_changes(jt);
125 }
127 if(has_gc_notification_event) {
128 GCNotifier::sendNotification(CHECK);
129 }
131 if(has_dcmd_notification_event) {
132 DCmdFactory::send_notification(CHECK);
133 }
135 if (acs_notify) {
136 AllocationContextService::notify(CHECK);
137 }
138 }
139 }
141 bool ServiceThread::is_service_thread(Thread* thread) {
142 return thread == _instance;
143 }