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/jni/jfrJavaSupport.hpp"
27 #include "jfr/periodic/jfrThreadCPULoadEvent.hpp"
28 #include "jfr/recorder/jfrRecorder.hpp"
29 #include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"
30 #include "jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp"
31 #include "jfr/recorder/service/jfrOptionSet.hpp"
32 #include "jfr/recorder/storage/jfrStorage.hpp"
33 #include "jfr/recorder/stacktrace/jfrStackTraceRepository.hpp"
34 #include "jfr/support/jfrThreadLocal.hpp"
35 #include "memory/allocation.inline.hpp"
36 #include "runtime/os.hpp"
37 #include "runtime/thread.inline.hpp"
38
39 /* This data structure is per thread and only accessed by the thread itself, no locking required */
40 JfrThreadLocal::JfrThreadLocal() :
41 _java_event_writer(NULL),
42 _java_buffer(NULL),
43 _native_buffer(NULL),
44 _shelved_buffer(NULL),
45 _stackframes(NULL),
46 _trace_id(JfrTraceId::assign_thread_id()),
47 _thread_cp(),
48 _data_lost(0),
49 _stack_trace_id(max_julong),
50 _user_time(0),
51 _cpu_time(0),
52 _wallclock_time(os::javaTimeNanos()),
53 _stack_trace_hash(0),
54 _stackdepth(0),
55 _entering_suspend_flag(0),
56 _dead(false) {}
57
58 u8 JfrThreadLocal::add_data_lost(u8 value) {
59 _data_lost += value;
60 return _data_lost;
61 }
62
63 bool JfrThreadLocal::has_thread_checkpoint() const {
64 return _thread_cp.valid();
65 }
66
67 void JfrThreadLocal::set_thread_checkpoint(const JfrCheckpointBlobHandle& ref) {
68 assert(!_thread_cp.valid(), "invariant");
69 _thread_cp = ref;
70 }
71
72 const JfrCheckpointBlobHandle& JfrThreadLocal::thread_checkpoint() const {
73 return _thread_cp;
74 }
75
76 void JfrThreadLocal::set_dead() {
77 assert(!is_dead(), "invariant");
78 _dead = true;
79 }
80
81 void JfrThreadLocal::on_exit(JavaThread* thread) {
82 if (JfrRecorder::is_recording()) {
83 JfrCheckpointManager::write_thread_checkpoint(thread);
84 JfrThreadCPULoadEvent::send_event_for_thread(thread);
85 }
86 thread->jfr_thread_local()->set_dead();
87 }
88
89 void JfrThreadLocal::on_destruct(Thread* thread) {
90 JfrThreadLocal* const tl = thread->jfr_thread_local();
91 if (tl->has_native_buffer()) {
92 release(tl->native_buffer(), thread);
93 }
94 if (tl->has_java_buffer()) {
95 release(tl->java_buffer(), thread);
96 }
97 assert(tl->shelved_buffer() == NULL, "invariant");
98 if (thread->jfr_thread_local()->has_java_event_writer()) {
99 JfrJavaSupport::destroy_global_jni_handle(tl->java_event_writer());
100 }
101 destroy_stackframes(thread);
102 }
103
104 JfrBuffer* JfrThreadLocal::acquire(Thread* thread, size_t size) {
105 return JfrStorage::acquire_thread_local(thread, size);
106 }
107
108 void JfrThreadLocal::release(JfrBuffer* buffer, Thread* thread) {
109 assert(buffer != NULL, "invariant");
110 JfrStorage::release_thread_local(buffer, thread);
111 }
112
113 JfrBuffer* JfrThreadLocal::install_native_buffer() const {
114 assert(!has_native_buffer(), "invariant");
115 _native_buffer = acquire(Thread::current());
116 return _native_buffer;
117 }
118
119 JfrBuffer* JfrThreadLocal::install_java_buffer() const {
120 assert(!has_java_buffer(), "invariant");
121 assert(!has_java_event_writer(), "invariant");
122 _java_buffer = acquire(Thread::current());
123 return _java_buffer;
124 }
125
126 JfrStackFrame* JfrThreadLocal::install_stackframes() const {
127 assert(_stackframes == NULL, "invariant");
128 _stackdepth = (u4)JfrOptionSet::stackdepth();
129 guarantee(_stackdepth > 0, "Stackdepth must be > 0");
130 _stackframes = NEW_C_HEAP_ARRAY(JfrStackFrame, _stackdepth, mtTracing);
131 return _stackframes;
132 }
133
134 void JfrThreadLocal::destroy_stackframes(Thread* thread) {
135 assert(thread != NULL, "invariant");
136 JfrStackFrame* frames = thread->jfr_thread_local()->stackframes();
137 if (frames != NULL) {
138 FREE_C_HEAP_ARRAY(JfrStackFrame, frames, mtTracing);
139 thread->jfr_thread_local()->set_stackframes(NULL);
140 }
141 }