1 /*
2 * Copyright (c) 2012, 2018, 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 */
24
25 #include "precompiled.hpp"
26 #include "jfr/jfrEvents.hpp"
27 #include "jfr/jni/jfrJavaSupport.hpp"
28 #include "jfr/periodic/jfrThreadCPULoadEvent.hpp"
29 #include "jfr/recorder/jfrRecorder.hpp"
30 #include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"
31 #include "jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp"
32 #include "jfr/recorder/service/jfrOptionSet.hpp"
33 #include "jfr/recorder/storage/jfrStorage.hpp"
34 #include "jfr/recorder/stacktrace/jfrStackTraceRepository.hpp"
35 #include "jfr/support/jfrThreadLocal.hpp"
36 #include "memory/allocation.inline.hpp"
37 #include "runtime/os.hpp"
38 #include "runtime/thread.inline.hpp"
39 #include "utilities/sizes.hpp"
40
41 /* This data structure is per thread and only accessed by the thread itself, no locking required */
42 JfrThreadLocal::JfrThreadLocal() :
43 _java_event_writer(NULL),
44 _java_buffer(NULL),
45 _native_buffer(NULL),
46 _shelved_buffer(NULL),
47 _stackframes(NULL),
48 _trace_id(JfrTraceId::assign_thread_id()),
49 _thread_cp(),
50 _data_lost(0),
51 _stack_trace_id(max_julong),
52 _user_time(0),
53 _cpu_time(0),
54 _wallclock_time(os::javaTimeNanos()),
55 _stack_trace_hash(0),
56 _stackdepth(0),
57 _entering_suspend_flag(0),
58 _dead(false) {
59
60 Thread* thread = Thread::current_or_null();
61 _parent_trace_id = thread != NULL ? thread->jfr_thread_local()->trace_id() : (traceid)0;
62 }
63
64 u8 JfrThreadLocal::add_data_lost(u8 value) {
65 _data_lost += value;
66 return _data_lost;
67 }
68
69 bool JfrThreadLocal::has_thread_checkpoint() const {
70 return _thread_cp.valid();
71 }
72
73 void JfrThreadLocal::set_thread_checkpoint(const JfrCheckpointBlobHandle& ref) {
74 assert(!_thread_cp.valid(), "invariant");
75 _thread_cp = ref;
76 }
77
78 const JfrCheckpointBlobHandle& JfrThreadLocal::thread_checkpoint() const {
79 return _thread_cp;
80 }
81
82 static void send_java_thread_start_event(JavaThread* jt) {
83 EventThreadStart event;
84 event.set_thread(jt->jfr_thread_local()->thread_id());
85 event.set_parentThread(jt->jfr_thread_local()->parent_thread_id());
86 event.commit();
87 }
88
89 void JfrThreadLocal::on_start(Thread* t) {
90 assert(t != NULL, "invariant");
91 assert(Thread::current() == t, "invariant");
92 if (JfrRecorder::is_recording()) {
93 if (t->is_Java_thread()) {
94 send_java_thread_start_event((JavaThread*)t);
95 }
96 }
97 if (t->jfr_thread_local()->has_cached_stack_trace()) {
98 t->jfr_thread_local()->clear_cached_stack_trace();
99 }
100 }
101
102 static void send_java_thread_end_events(traceid id, JavaThread* jt) {
103 assert(jt != NULL, "invariant");
104 assert(Thread::current() == jt, "invariant");
105 assert(jt->jfr_thread_local()->trace_id() == id, "invariant");
106 EventThreadEnd event;
107 event.set_thread(id);
108 event.commit();
109 JfrThreadCPULoadEvent::send_event_for_thread(jt);
110 }
111
112 void JfrThreadLocal::release(JfrThreadLocal* tl, Thread* t) {
113 assert(tl != NULL, "invariant");
114 assert(t != NULL, "invariant");
115 assert(Thread::current() == t, "invariant");
116 assert(!tl->is_dead(), "invariant");
117 assert(tl->shelved_buffer() == NULL, "invariant");
118 if (tl->has_native_buffer()) {
119 JfrStorage::release_thread_local(tl->native_buffer(), t);
120 }
121 if (tl->has_java_buffer()) {
122 JfrStorage::release_thread_local(tl->java_buffer(), t);
123 }
124 if (tl->has_java_event_writer()) {
125 assert(t->is_Java_thread(), "invariant");
126 JfrJavaSupport::destroy_global_jni_handle(tl->java_event_writer());
127 }
128 if (tl->_stackframes != NULL) {
129 FREE_C_HEAP_ARRAY(JfrStackFrame, tl->_stackframes, mtTracing);
130 }
131 tl->_dead = true;
132 }
133
134 void JfrThreadLocal::on_exit(Thread* t) {
135 assert(t != NULL, "invariant");
136 JfrThreadLocal * const tl = t->jfr_thread_local();
137 assert(!tl->is_dead(), "invariant");
138 if (JfrRecorder::is_recording()) {
139 if (t->is_Java_thread()) {
140 send_java_thread_end_events(tl->thread_id(), (JavaThread*)t);
141 }
142 }
143 release(tl, Thread::current()); // because it could be that Thread::current() != t
144 }
145
146 JfrBuffer* JfrThreadLocal::install_native_buffer() const {
147 assert(!has_native_buffer(), "invariant");
148 _native_buffer = JfrStorage::acquire_thread_local(Thread::current());
149 return _native_buffer;
150 }
151
152 JfrBuffer* JfrThreadLocal::install_java_buffer() const {
153 assert(!has_java_buffer(), "invariant");
154 assert(!has_java_event_writer(), "invariant");
155 _java_buffer = JfrStorage::acquire_thread_local(Thread::current());
156 return _java_buffer;
157 }
158
159 JfrStackFrame* JfrThreadLocal::install_stackframes() const {
160 assert(_stackframes == NULL, "invariant");
161 _stackframes = NEW_C_HEAP_ARRAY(JfrStackFrame, stackdepth(), mtTracing);
162 return _stackframes;
163 }
164
165 ByteSize JfrThreadLocal::trace_id_offset() {
166 return in_ByteSize(offset_of(JfrThreadLocal, _trace_id));
167 }
168
169 ByteSize JfrThreadLocal::java_event_writer_offset() {
170 return in_ByteSize(offset_of(JfrThreadLocal, _java_event_writer));
171 }
172
173 u4 JfrThreadLocal::stackdepth() const {
174 return _stackdepth != 0 ? _stackdepth : (u4)JfrOptionSet::stackdepth();
175 }